/**
 * Main Stylesheet - Training Management System
 * University of Technology and Education - Da Nang University
 * Author: nnkhanh-dev
 * Version: 1.0.0
 */

/* ===== IMPORTS ===== */
@import url('./variables.css');

/* ===== CSS RESET ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== BASE STYLES ===== */
html {
    scroll-behavior: smooth;
}


img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

input,
button,
textarea,
select {
    font: inherit;
    border: none;
    background: none;
    outline: none;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

ul,
ol {
    list-style: none;
}

strong {
    color: var(--color-secondary);
    font-weight: 700;
}

/* ===== UTILITY CLASSES ===== */
.text-ellipsis {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.text-ellipsis-1 {
    -webkit-line-clamp: 1;
    line-clamp: 1;
    line-height: 1.5em;
    min-height: 1.5em;
    max-height: 1.5em;
}

.text-ellipsis-2 {
    -webkit-line-clamp: 2;
    line-clamp: 2;
    line-height: 1.5em;
    min-height: 3em;
    max-height: 3em;
}

.text-ellipsis-3 {
    -webkit-line-clamp: 3;
    line-clamp: 3;
    line-height: 1.5em;
    min-height: 4.5em;
    max-height: 4.5em;
}

/* ===== ANIMATIONS ===== */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse-button {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7);
    }

    50% {
        box-shadow: 0 0 0 8px rgba(255, 255, 255, 0);
    }
}

@keyframes pulse-button-white {
    0%, 100% {
        box-shadow: 0 0 0 0 var(--color-primary);
    }

    50% {
        box-shadow: 0 0 0 8px rgba(255, 255, 255, 0.1);
    }
}

/* ===== HEADER ===== */
.site-header {
    position: relative;
    z-index: 1000;
    background: white;
}

/* Main Header */
.header-main {
    background: white;
    padding: 4px 0;
}

    .header-main .row {
        margin: 0;
    }

/* Logo - Large & Prominent */
.site-logo img {
    width: initial;
    max-width: 450px;
    height: auto;
    transition: transform 0.3s ease;
}

.site-logo:hover img {
    transform: scale(1.01);
}

@media (max-width: 991.98px) {
    .site-logo {
        width: 100%;
        max-width: 100%;
    }

        .site-logo img {
            width: 100%;
            max-width: 100%;
        }
}

/* Header Right Side */
.header-right {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* Top Row - Quick Links + Login */
.header-top-row {
    padding-bottom: 4px;
}

.topbar-links {
    display: flex;
    gap: 10px;
    align-items: center;
}

.topbar-link {
    color: #666;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    padding: 2px 6px;
    border-radius: 3px;
}

    .topbar-link:hover {
        background: #f5f5f5;
        color: var(--color-primary);
    }

    .topbar-link i {
        font-size: 0.8rem;
    }

.topbar-login {
    color: white;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border: none;
    border-radius: 15px;
    background: var(--color-primary);
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.8rem;
}

    .topbar-login:hover {
        background: var(--color-secondary);
    }

    .topbar-login svg {
        width: 14px;
        height: 14px;
        fill: currentColor;
    }

/* Bottom Row - Search */
.header-bottom-row {
    padding-top: 2px;
}

/* Header Search */
.header-search {
    position: relative;
}

.search-form {
    display: flex;
    align-items: center;
    background: #f8f9fa;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
}

    .search-form:focus-within {
        background: white;
        border-color: var(--color-primary);
        box-shadow: 0 1px 5px rgba(25, 118, 210, 0.1);
    }

.search-input {
    border: none;
    outline: none;
    padding: 6px 12px;
    background: transparent;
    flex: 1;
    min-width: 240px;
    font-size: 0.85rem;
}

    .search-input::placeholder {
        color: #adb5bd;
    }

.search-btn {
    background: var(--color-primary);
    border: none;
    padding: 10px 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

    .search-btn:hover {
        background: var(--color-secondary);
    }

    .search-btn svg {
        width: 16px;
        height: 16px;
        fill: white;
    }

/* Mobile Menu Toggle */
.navbar__toggle {
    display: flex;
    flex-direction: column;
    gap: 3px;
    background: var(--color-primary);
    border: none;
    padding: 8px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

    .navbar__toggle span {
        display: block;
        width: 20px;
        height: 2px;
        background: white;
        border-radius: 2px;
        transition: all 0.3s ease;
    }

    .navbar__toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(3px, 4px);
    }

    .navbar__toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .navbar__toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(3px, -4px);
    }

/* ===== NAVIGATION ===== */
.main-nav {
    background: var(--color-primary);
    position: sticky;
    top: 0;
    z-index: 999;
}

/* Desktop Menu */
.navbar__content--expand {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
}

    .navbar__content--expand > li {
        position: relative;
    }

        .navbar__content--expand > li > a {
            color: white !important;
            text-decoration: none;
            padding: 15px 20px;
            display: flex;
            align-items: center;
            gap: 7px;
            font-weight: 500;
            font-size: 1.1rem;
            font-weight: 400;
            transition: all 0.3s ease;
            border-radius: 6px;
            white-space: nowrap;
        }

            .navbar__content--expand > li > a:hover {
                background: rgba(255, 255, 255, 0.15);
                color: #ffd54f;
            }

            .navbar__content--expand > li > a i.fa-home {
                font-size: 1.1rem;
            }

            .navbar__content--expand > li > a i.fa-chevron-down {
                font-size: 0.75rem;
                transition: transform 0.3s ease;
            }

        .navbar__content--expand > li.has-submenu:hover > a i.fa-chevron-down {
            transform: rotate(180deg);
        }

/* Submenu */
.has-submenu {
    position: relative;
}

.submenu {
    list-style: none;
    padding: 10px 0;
    margin: 0;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 260px;
    background: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border-radius: 12px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu li {
    margin: 0 12px !important;
    width: calc(100% - 24px);
}

    .submenu li a {
        color: var(--color-secondary);
        text-decoration: none;
        padding: 12px 20px;
        display: block;
        transition: all 0.3s ease;
        border-left: 3px solid transparent;
        font-size: 1rem;
    }

        .submenu li a:hover {
            background: #f5f7fa;
            border-left-color: var(--color-primary);
            color: var(--color-primary);
            padding-left: 28px;
        }

    .submenu li:first-child a {
        border-top-left-radius: 12px;
        border-top-right-radius: 12px;
    }

    .submenu li:last-child a {
        border-bottom-left-radius: 12px;
        border-bottom-right-radius: 12px;
    }

/* Mobile Menu */
.mobile-menu-wrapper {
    display: none;
    width: 100%;
    background: white;
    padding: 0;
}

    .mobile-menu-wrapper.active {
        display: block;
    }

/* Show wrapper on mobile, but hide content by default */
@media (max-width: 991.98px) {
    .mobile-menu-wrapper {
        display: block;
    }

        .mobile-menu-wrapper .mobile-search,
        .mobile-menu-wrapper .navbar__content {
            display: none;
        }

        .mobile-menu-wrapper.active .mobile-search,
        .mobile-menu-wrapper.active .navbar__content {
            display: block;
        }
}

.mobile-search {
    padding: 15px 20px;
    border-bottom: 1px solid #e9ecef;
    border-top: 1px solid #e9ecef;
}

    .mobile-search .search-form {
        background: #f8f9fa;
        border: 1px solid #e9ecef;
    }

    .mobile-search .search-input {
        color: var(--color-secondary);
        min-width: auto;
    }

        .mobile-search .search-input::placeholder {
            color: #adb5bd;
        }

.navbar__content {
    list-style: none;
    padding: 0;
    margin: 0 !important;
    background: white;
}

    .navbar__content li {
        margin: 0 !important;
    }

    .navbar__content > li > a {
        color: var(--color-secondary);
        text-decoration: none;
        padding: 15px 20px;
        display: flex;
        align-items: center;
        gap: 10px;
        border-bottom: 1px solid #e9ecef;
        transition: all 0.3s ease;
        font-weight: 500;
        font-size: 1rem;
    }

        .navbar__content > li > a i {
            font-size: 1rem;
        }

        .navbar__content > li > a:hover {
            background: #f8f9fa;
            color: var(--color-primary);
            padding-left: 30px;
        }

/* Mobile Submenu */
.has-submenu-mobile {
    position: relative;
}

    .has-submenu-mobile > a i.fa-chevron-down {
        margin-left: auto;
        font-size: 0.8rem;
        transition: transform 0.3s ease;
    }

.submenu-mobile {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    background: #f8f9fa;
    transition: max-height 0.3s ease;
}

.has-submenu-mobile.active .submenu-mobile {
    max-height: 500px;
}

.has-submenu-mobile.active > a i.fa-chevron-down {
    transform: rotate(180deg);
}

.submenu-mobile li a {
    color: var(--color-secondary);
    text-decoration: none;
    padding: 12px 20px 12px 40px;
    display: block;
    border-bottom: 1px solid #e9ecef;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

    .submenu-mobile li a:hover {
        background: white;
        color: var(--color-primary);
        padding-left: 50px;
    }

/* Mobile Menu Overlay - Not needed anymore but keep for compatibility */
.mobile-menu-overlay {
    display: none;
}

@media (min-width: 992px) {
    .mobile-menu-wrapper,
    .mobile-menu-overlay {
        display: none !important;
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.navbar__toggle::before {
    top: -9px;
}

.navbar__toggle::after {
    top: 9px;
}

/* Navigation Content (Mobile) */
.navbar__content {
    width: 100%;
    display: none;
    margin: var(--spacing-md) 0;
    padding: 0 var(--spacing-md);
}

    .navbar__content.active {
        display: block;
    }

    .navbar__content li {
        margin: var(--spacing-sm) 0;
    }

    .navbar__content a {
        color: white;
        display: block;
        padding: var(--spacing-xs) 0;
    }

/* Navigation Content Expanded (Desktop) */
.navbar__content--expand {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 0;
}

    .navbar__content--expand li {
        display: inline-block;
        margin: 0 var(--spacing-md);
    }

    .navbar__content--expand a {
        color: white;
        font-size: larger;
    }

/* ===== HEADER EXTENSION ===== */
.header__extension a {
    color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 var(--spacing-sm);
    transition: color 0.3s ease;
}

    .header__extension a svg {
        fill: rgba(0, 0, 0, 0.8);
        width: 20px;
        margin-right: var(--spacing-xs);
        transition: fill 0.3s ease;
    }

    .header__extension a:hover {
        color: var(--color-primary);
    }

        .header__extension a:hover svg {
            fill: var(--color-primary);
        }

/* Search Form */
.header__extension form {
    display: flex;
    width: 200px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

@media (min-width: 992px) {
    .header__extension form {
        width: 300px;
        height: 40px;
    }
}

.header__extension input {
    background-color: white;
    width: 80%;
    padding: 6px 12px;
}

.header__extension button {
    background-color: white;
    aspect-ratio: 1/1;
    width: 20%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

    .header__extension button svg {
        fill: gray;
        width: 20px;
    }

/* ===== BANNER / HERO ===== */
.banner {
    width: 100%;
    overflow: hidden;
    aspect-ratio: 4/3;
}

@media (min-width: 768px) {
    .banner {
        width: 100%;
        height: 100vh;
    }
}

.banner img {
    width: 100%;
    height: 100%;
    object-fit: fill;
    object-position: center;
}

/* ===== SECTIONS ===== */
section {
    padding: calc(var(--spacing-xl) * 2) 0;
    position: relative;
    overflow: hidden;
}

/* Hero Section */
.section--hero {
    padding: 0;
    position: relative;
}

.section__overlay {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.3));
    backdrop-filter: blur(2px);
}

.overlay__content {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    padding: var(--spacing-md);
}

.hero__title {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

.hero__subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xl);
}


.bg--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)) !important;
    color: white !important;
    position: relative;
}

/* Văn bằng minh họa image container and image fit */
.w-100.h-100.d-flex.align-items-center {
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

    .w-100.h-100.d-flex.align-items-center img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center;
        display: block;
        transition: transform 0.3s ease;
    }

    .w-100.h-100.d-flex.align-items-center:hover img {
        transform: scale(1.05);
    }

.bg--primary svg {
    fill: white !important;
}

.bg--gray {
    background-color: var(--color-gray) !important;
    color: var(--color-secondary) !important;
    position: relative;
}

.bg--tech {
    background-color: var(--color-gray) !important;
    color: var(--color-secondary) !important;
    position: relative;
    overflow: hidden;
    color: white !important;
}

    .bg--tech svg {
        fill: white !important;
    }

    .bg--tech::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('../assets/images/tech_background.jpg');
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        opacity: 1;
        z-index: 0;
    }

    .bg--tech > * {
        position: relative;
        z-index: 1;
    }



    .bg--gray .section__header, .bg--light .section__header, .bg--tech .section__header {
        background: linear-gradient(135deg, rgba(0,40,120,0.1), rgba(55,130,245,0.05));
        border: 1px solid rgba(0,40,120,0.1);
        box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
        width: 100%;
    }

@media (min-width: 992px) {
    .bg--gray .section__header, .bg--light .section__header, .bg--tech .section__header {
        width: initial;
    }
}

.bg--gray .section__header::before, .bg--light .section__header::before, .bg--tech .section__header::before {
    background: radial-gradient(circle, rgba(0,40,120,0.1) 0%, transparent 70%);
    z-index: 1;
}

.bg--gray .section__header::after, .bg--light .section__header::after, .bg--tech .section__header::after {
    background: linear-gradient(90deg, transparent, rgba(0,40,120,0.2), transparent);
    z-index: 1;
}

.bg--gray svg, .bg--light svg {
    fill: var(--color-secondary) !important;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.bg--light {
    background: linear-gradient(135deg, #ffffff, #f8f9fa) !important;
    color: var(--color-secondary) !important;
    position: relative;
}

/* ===== HEADER COLOR VARIANTS ===== */

/* Primary Header - Màu xanh chủ đạo */
.primary__header {
    background-color: var(--color-primary) !important;
    color: var(--color-white) !important;
}

    .primary__header svg {
        fill: var(--color-white) !important;
    }

/* Secondary Header - Màu xanh đậm */
.secondary__header {
    background-color: var(--color-secondary) !important;
    color: var(--color-white) !important;
}

    .secondary__header svg {
        fill: var(--color-white) !important;
    }

/* Success Header - Màu xanh lá (thành công) */
.success__header {
    background-color: var(--color-success) !important;
    color: var(--color-white) !important;
}

    .success__header svg {
        fill: var(--color-white) !important;
    }

/* Warning Header - Màu vàng (cảnh báo) */
.warning__header {
    background-color: var(--color-warning) !important;
    color: var(--color-dark) !important;
}

    .warning__header svg {
        fill: var(--color-danger) !important;
    }

/* Danger Header - Màu đỏ (nguy hiểm) */
.danger__header {
    background-color: var(--color-danger) !important;
    color: var(--color-white) !important;
}

    .danger__header svg {
        fill: var(--color-white) !important;
    }

/* Info Header - Màu xanh dương nhạt (thông tin) */
.info__header {
    background-color: var(--color-info) !important;
    color: var(--color-white) !important;
}

    .info__header svg {
        fill: var(--color-white) !important;
    }

/* Light Header - Màu sáng */
.light__header {
    background-color: var(--color-light) !important;
    color: var(--color-dark) !important;
    border: 1px solid var(--color-gray);
}

    .light__header svg {
        fill: var(--color-primary) !important;
    }

/* Dark Header - Màu tối */
.dark__header {
    background-color: var(--color-dark) !important;
    color: var(--color-white) !important;
}

    .dark__header svg {
        fill: var(--color-white) !important;
    }

/* Gradient Header - Gradient chủ đạo */
.gradient__header {
    background: var(--gradient-primary) !important;
    color: var(--color-white) !important;
}

    .gradient__header svg {
        fill: var(--color-white) !important;
    }

/* Muted Header - Màu nhạt, dịu */
.muted__header {
    background-color: var(--color-gray) !important;
    color: var(--color-secondary) !important;
}

    .muted__header svg {
        fill: var(--color-secondary) !important;
    }

/* ===== CERTIFICATE LOOKUP FORM ===== */
.certificate-lookup-form {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
    margin-top: 0px !important;
    min-height: 580px;
    display: flex;
    flex-direction: column;
}

    .certificate-lookup-form:hover {
        box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
    }

.certificate-lookup-form__header {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1565c0 100%);
    padding: 0.75rem 1.25rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

    .certificate-lookup-form__header::before {
        content: '';
        position: absolute;
        top: -50%;
        right: -50%;
        width: 200px;
        height: 200px;
        background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
        animation: float 6s ease-in-out infinite;
    }

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }

    50% {
        transform: translate(-20px, 20px) rotate(180deg);
    }
}

.certificate-lookup-form__header i {
    width: 28px;
    height: 28px;
    fill: #ffd700 !important;
    margin-bottom: 0.3rem;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.certificate-lookup-form__header h3 {
    color: white;
    font-size: 1rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: 0.8px;
    text-transform: uppercase;
}

.certificate-lookup-form__body {
    padding: 1rem 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

    .certificate-lookup-form__body .form-group {
        margin-bottom: 0.7rem;
    }

    .certificate-lookup-form__body .form-label {
        display: flex;
        align-items: center;
        gap: 0.45rem;
        font-weight: 600;
        font-size: 0.85rem;
        color: var(--color-secondary);
        margin-bottom: 0.3rem;
    }

        .certificate-lookup-form__body .form-label i {
            color: var(--color-primary);
            font-size: 0.9rem;
        }

    .certificate-lookup-form__body .form-control {
        width: 100%;
        padding: 0.55rem 0.8rem;
        border: 2px solid #e9ecef;
        border-radius: 8px;
        font-size: 0.88rem;
        transition: all 0.3s ease;
        background: #f8f9fa;
    }

        .certificate-lookup-form__body .form-control:focus {
            outline: none;
            border-color: var(--color-primary);
            background: white;
            box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
        }

        .certificate-lookup-form__body .form-control::placeholder {
            color: #adb5bd;
            font-size: 0.85rem;
        }

.certificate-lookup-form__submit {
    width: 100%;
    padding: 0.7rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, #1565c0 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 0.92rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 0;
    position: relative;
    overflow: hidden;
}

    .certificate-lookup-form__submit::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
        transition: left 0.5s ease;
    }

    .certificate-lookup-form__submit:hover::before {
        left: 100%;
    }

    .certificate-lookup-form__submit:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(25, 118, 210, 0.3);
    }

    .certificate-lookup-form__submit:active {
        transform: translateY(0);
    }

    .certificate-lookup-form__submit svg {
        width: 16px;
        height: 16px;
        fill: white !important;
    }

@media (max-width: 991.98px) {
    .certificate-lookup-form {
        margin-top: 2rem;
    }
}

/* ===== QUICK ACCESS CARDS ===== */
.quick-access-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #e9ecef 100%);
    position: relative;
    overflow: hidden;
    padding-top: 2rem !important;
    padding-bottom: 2rem !important;
}

    .quick-access-section::before {
        content: '';
        position: absolute;
        top: -50%;
        right: -20%;
        width: 500px;
        height: 500px;
        background: radial-gradient(circle, rgba(25, 118, 210, 0.05) 0%, transparent 70%);
        pointer-events: none;
    }

    .quick-access-section::after {
        content: '';
        position: absolute;
        bottom: -50%;
        left: -20%;
        width: 500px;
        height: 500px;
        background: radial-gradient(circle, rgba(76, 175, 80, 0.05) 0%, transparent 70%);
        pointer-events: none;
    }

.quick-access-card {
    display: flex;
    align-items: center;
    gap: 0;
    position: relative;
    padding: 1.5rem;
    border-radius: 16px;
    background: white;
    text-decoration: none;
    color: white;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    height: 100%;
    min-height: 100px;
}

    .quick-access-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
        opacity: 0;
        transition: opacity 0.4s ease;
    }

    .quick-access-card:hover {
        transform: translateY(-10px) scale(1.02);
        box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        text-decoration: none;
        color: white;
    }

        .quick-access-card:hover::before {
            opacity: 1;
        }

/* Blue Card - Giảng Viên */
.quick-access-card--blue {
    background: linear-gradient(135deg, #1976d2 0%, #0d47a1 100%);
}

    .quick-access-card--blue:hover {
        background: linear-gradient(135deg, #2196f3 0%, #1565c0 100%);
    }

/* Green Card - Sinh Viên */
.quick-access-card--green {
    background: linear-gradient(135deg, #4caf50 0%, #2e7d32 100%);
}

    .quick-access-card--green:hover {
        background: linear-gradient(135deg, #66bb6a 0%, #388e3c 100%);
    }

/* Orange Card - Gia Đình */
.quick-access-card--orange {
    background: linear-gradient(135deg, #ff9800 0%, #e65100 100%);
}

    .quick-access-card--orange:hover {
        background: linear-gradient(135deg, #ffa726 0%, #f57c00 100%);
    }

.quick-access-card__icon {
    width: 60px;
    height: 60px;
    flex-shrink: 0;
    margin-bottom: 0.75rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.quick-access-card:hover .quick-access-card__icon {
    transform: rotate(360deg) scale(1.1);
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

.quick-access-card__icon svg {
    width: 32px;
    height: 32px;
    fill: white;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.quick-access-card__content {
    position: relative;
    z-index: 2;
    width: 80%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
}

.quick-access-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    line-height: 1.3;
    flex: 1;
}

.quick-access-card__subtitle {
    display: none;
}

.quick-access-card__arrow {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    margin-left: auto;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.quick-access-card:hover .quick-access-card__arrow {
    transform: translateX(5px);
    background: rgba(255, 255, 255, 0.3);
    border-color: white;
}

.quick-access-card__arrow svg {
    width: 20px;
    height: 20px;
    fill: white;
    transition: transform 0.4s ease;
}

.quick-access-card:hover .quick-access-card__arrow svg {
    transform: translateX(3px);
}

.quick-access-card__bg {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    pointer-events: none;
    transition: all 0.6s ease;
}

.quick-access-card:hover .quick-access-card__bg {
    transform: scale(1.5);
    opacity: 0.8;
}

/* Responsive adjustments */
@media (max-width: 991.98px) {
    .quick-access-card {
        min-height: 110px;
    }

    .quick-access-card__title {
        font-size: 1rem;
    }
}

@media (max-width: 767.98px) {
    .quick-access-card {
        min-height: 100px;
        padding: 1rem;
    }

    .quick-access-card__icon {
        width: 50px;
        height: 50px;
        margin-bottom: 0.5rem;
    }

        .quick-access-card__icon svg {
            width: 26px;
            height: 26px;
        }

    .quick-access-card__content {
        width: 75%;
    }

    .quick-access-card__title {
        font-size: 0.95rem;
        letter-spacing: 0.3px;
    }

    .quick-access-card__arrow {
        width: 40px;
        height: 40px;
    }

        .quick-access-card__arrow svg {
            width: 16px;
            height: 16px;
        }
}

.hero__btn {
    display: flex;
    flex-direction: row;
    background-color: var(--color-primary) !important;
    color: white !important;
    padding: var(--spacing-md);
    position: relative;
    overflow: hidden;
    transition: transform 0.5s ease;
}

    .hero__btn:hover {
        box-shadow: var(--shadow-lg);
        transform: translateY(-2px);
        background-color: var(--color-secondary) !important;
        scale: 1.05;
    }

    .hero__btn svg {
        fill: white !important;
        width: 25px;
        margin-right: var(--spacing-sm);
        animation: float 3s ease-in-out infinite;
    }

    .hero__btn::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 50%);
        animation: rotate 15s linear infinite;
    }

    .hero__btn::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 1px;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    }

.btn__lg--primary {
    background-color: var(--color-primary) !important;
    color: white !important;
    padding: 16px 32px !important;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    font-weight: bold !important;
    border: 1px solid rgba(128, 128, 128, 0.3);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    position: relative;
}

    .btn__lg--primary::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 1px;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    }

.btn__lg--secondary {
    background-color: var(--color-secondary) !important;
    color: white !important;
    padding: 16px 32px !important;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    border: 1px solid rgba(128, 128, 128, 0.3);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    position: relative;
}

    .btn__lg--secondary::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 1px;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    }

.btn--primary {
    background-color: var(--color-primary) !important;
    color: white !important;
    padding: 6px !important;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    border: 1px solid rgba(128, 128, 128, 0.3);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
}

.btn--secondary {
    background-color: var(--color-secondary) !important;
    color: white !important;
    padding: 6px !important;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    border: 1px solid rgba(128, 128, 128, 0.3);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
}

.btn--primary svg {
    fill: white !important;
    width: 20px;
    margin-right: var(--spacing-sm);
}

.btn--secondary svg {
    fill: white !important;
    width: 20px;
    margin-right: var(--spacing-sm);
}

.btn__lg--primary svg {
    fill: white !important;
    width: 30px;
    margin-right: var(--spacing-sm);
    animation: float 3s ease-in-out infinite;
}

.btn__lg--secondary svg {
    fill: white !important;
    width: 30px;
    margin-right: var(--spacing-sm);
    animation: float 3s ease-in-out infinite;
}

.section__header {
    text-transform: uppercase;
    font-weight: bold;
    font-size: var(--font-size-lg);
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    width: 100%;
}

@media (min-width: 992px) {
    .section__header {
        width: initial;
    }
}

.section__header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 50%);
    animation: rotate 15s linear infinite;
}

.section__header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
}

.section__header svg {
    width: 35px;
    margin-right: var(--spacing-md);
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
    animation: float 3s ease-in-out infinite;
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

.card__event, .card__notification {
    width: 100%;
    color: black;
}

    .card__event .card__header, .card__notification .card__header {
        text-transform: uppercase;
        background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
        color: white;
        font-weight: bold;
        display: flex;
        flex-direction: row;
        align-items: center;
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-lg);
        border-radius: var(--border-radius-md);
        box-shadow: var(--shadow-md);
        position: relative;
        overflow: hidden;
        margin-bottom: var(--spacing-md);
    }

        .card__event .card__header::before, .card__notification .card__header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><rect width="100%" height="100%" fill="none"/><circle cx="3" cy="3" r="0.5" fill="rgba(255,255,255,0.1)"/></svg>') repeat;
            opacity: 0.2;
        }

        .card__event .card__header svg, .card__notification .card__header svg {
            fill: white !important;
            width: 30px;
            margin-right: var(--spacing-md);
            filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
            transition: transform 0.3s ease;
        }

        .card__event .card__header:hover svg, .card__notification .card__header:hover svg {
            transform: scale(1.1) rotate(5deg);
        }

    .card__event .card__body, .card__notification .card__body {
        padding: 0px;
    }

.event--main, .card__research {
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    transition: transform 0.3s ease;
}

    .event--main:hover, .card__research:hover {
        transform: translateY(-8px);
    }

        .event--main:hover .event__title, .card__research:hover .card__title {
            color: var(--color-primary) !important;
        }

        .event--main:hover .event__image img, .card__research:hover .card__image img {
            transform: scale(1.05);
        }

        .event--main:hover .event__time svg, .card__research:hover .card__time svg {
            fill: var(--color-primary) !important;
        }

    .event--main .event__image, .card__research .card__image {
        width: 100%;
        aspect-ratio: 4/3;
        overflow: hidden;
    }

    .card__research .card__image {
        aspect-ratio: 3/2;
    }

        .event--main .event__image img, .card__research .card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
            transition: transform 0.3s ease;
        }

    .event--main .event__body, .card__research .card__body {
        padding: var(--spacing-md);
    }

    .event--main .event__summary,
    .card__research .card__summary {
        display: -webkit-box;
        -webkit-line-clamp: 4;
        line-clamp: 4;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
        line-height: 1.5em;
        min-height: calc(1.5em * 4);
        max-height: calc(1.5em * 4);
        color: black;
    }

    .event--main .event__title,
    .event--sub .event__title,
    .card__research .card__title {
        color: var(--color-secondary);
        font-weight: bold;
        margin: 0 0 var(--spacing-sm);
        transition: color 0.3s ease;
        display: -webkit-box;
        -webkit-line-clamp:4;
        line-clamp: 4;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
        line-height: 1.5em;
        min-height: calc(1.5em * 4);
        max-height: calc(1.5em * 4);
    }

    .event--main .event__time, .event--sub .event__time, .card__research .card__time {
        display: flex;
        align-items: center;
        gap: var(--spacing-xs);
        font-size: var(--font-size-sm);
        color: #666;
        font-weight: 500;
    }

        .event--main .event__time svg, .event--sub .event__time svg, .card__research .card__time svg {
            fill: var(--color-secondary) !important;
            width: var(--font-size-lg);
            transition: fill 0.3s ease;
        }

.event--sub {
    display: flex;
    flex-direction: row;
    overflow: hidden;
    padding-bottom: var(--spacing-sm);
    height: calc((100% - 24px) / 4) !important;
    max-height: calc((100% - 24px) / 4) !important;
}

    .event--sub:hover .event__title {
        color: var(--color-primary) !important;
    }
    .event--sub .event__image {
        width: 36%;
        aspect-ratio: 1/1;
        overflow: hidden;
        border-radius: var(--border-radius-md);
        box-shadow: var(--shadow-md);
        transition: width 0.3s ease;
    }

    .event--sub .event__body {
        width: 64%;
        padding: var(--spacing-sm);
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .event--sub .event__image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: center;
    }

    .event--sub .event__time {
        margin: 0px 0px 0px auto;
        font-size: 12px;
    }

.notification {
    width: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: row;
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid rgba(0,0,0,0.2);
    height: 25%;
    max-height: 25%;
}

    .notification:hover .notification__title {
        color: var(--color-primary);
    }

    .notification:hover .notification__time {
        width: 26%;
    }

.notification__time {
    width: 25%;
    aspect-ratio: 1/1;
    overflow: hidden;
    margin: var(--spacing-sm);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    transition: width 0.3s ease;
}

    .notification__time .year {
        height: 50%;
        width: 100%;
        color: white;
        font-weight: bold;
        background-color: var(--color-primary);
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: var(--font-size-lg);
    }

    .notification__time .daymonth {
        height: 50%;
        width: 100%;
        color: var(--color-primary);
        font-weight: bold;
        background-color: white;
        display: flex;
        justify-content: center;
        align-items: center;
        box-shadow: var(--shadow-md);
        font-size: var(--font-size-lg);
    }

.notification__body {
    width: 70%;
    padding: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}


.notification__title {
    color: var(--color-secondary);
    font-weight: bold;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.5em;
    min-height: calc(1.5em * 4);
    max-height: calc(1.5em * 4);
    transition: color 0.3s ease;
}

.notification__summary {
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.5em;
    min-height: calc(1.5em * 4);
    max-height: calc(1.5em * 4);
}

.list__majors {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem; /* khoảng cách giữa các card */
}

.readmore {
    animation: float 3s ease-in-out infinite;
    margin-top: calc(var(--spacing-xl) * 2);
    display: flex;
    justify-content: center;
    align-items: center;
}

    .readmore a {
        text-decoration: none;
        text-transform: uppercase;
        font-weight: bold;
        color: white;
        display: flex;
    }

    .readmore svg {
        fill: white;
        width: 25px;
        margin-left: var(--spacing-sm);
    }

    .readmore a:hover {
        color: var(--color-gray);
    }

        .readmore a:hover svg {
            color: var(--color-gray);
        }

.card__major {
    flex: 1 1 100%;
    position: relative;
    transition: transform 0.3s ease;
}

/* từ md trở lên: 2 card/hàng */
@media (min-width: 768px) {
    .card__major {
        flex: 1 1 calc(50% - 1rem);
    }
}

/* từ xl trở lên: 4 card/hàng */
@media (min-width: 1200px) {
    .card__major {
        flex: 1 1 calc(25% - 1rem);
    }

        .card__major .card__body {
            font-size: smaller;
        }
}

/* Hover effect cho toàn bộ card */
.card__major:hover {
    transform: translateY(-8px);
}

.card__major .card__image {
    width: 100%;
    aspect-ratio: 3/2;
    overflow: hidden;
    border-radius: var(--border-radius-md);
    position: relative;
    box-shadow: var(--shadow-md);
    transition: all 0.4s ease;
}

.card__major:hover .card__image::before {
    opacity: 1;
}

/* Hiệu ứng zoom và brightness cho ảnh */
.card__major .card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s ease, filter 0.4s ease;
}

.card__major:hover .card__image img {
    transform: scale(1.1);
    filter: brightness(1.1);
}

.card__major:hover .card__image {
    box-shadow: var(--shadow-lg);
}

/* Card body với glassmorphism */
.card__major .card__body {
    background: linear-gradient( 135deg, var(--color-primary), var(--color-secondary) );
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm);
    text-transform: uppercase;
    font-weight: bold;
    color: white;
    text-align: center;
    position: absolute;
    bottom: 10px;
    left: 10px;
    right: 10px;
    border-radius: var(--border-radius-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px var(--color-secondary), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    overflow: hidden;
}

    /* Hiệu ứng shimmer cho card body */
    .card__major .card__body::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient( circle, rgba(255, 255, 255, 0.1) 0%, transparent 50% );
        animation: rotate 15s linear infinite;
        pointer-events: none;
    }

/* Hover effect cho card body */
.card__major:hover .card__body {
    background: linear-gradient( 135deg, rgba(55, 130, 245, 1), rgba(0, 40, 120, 1) );
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(31, 38, 135, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.card__major .card__body .card__title {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.5em;
    min-height: 1.5em;
    max-height: 1.5em;
    flex: 1;
    text-align: left;
    position: relative;
    z-index: 1;
    transition: letter-spacing 0.3s ease;
}

.card__major:hover .card__body .card__title {
    letter-spacing: 0.5px;
}

/* Button với hiệu ứng đẹp */
.card__major .card__body a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    z-index: 2;
    flex-shrink: 0;
    cursor: pointer;
}

    /* Hiệu ứng ripple cho button */
    .card__major .card__body a::before {
        content: '';
        position: absolute;
        inset: 0;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.3);
        transform: scale(0);
        transition: transform 0.5s ease;
    }

    .card__major .card__body a:hover::before {
        transform: scale(1.5);
        opacity: 0;
    }

    .card__major .card__body a:hover {
        border-color: white;
        background: rgba(255, 255, 255, 0.2);
        transform: translateX(5px) rotate(0deg);
        box-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
    }

    .card__major .card__body a svg {
        fill: white;
        width: 18px;
        height: 18px;
        transition: transform 0.3s ease;
        position: relative;
        z-index: 1;
        filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    }

    .card__major .card__body a:hover svg {
        transform: translateX(3px);
        filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
    }

/* Animation cho button khi hover card */
.card__major:hover .card__body a {
    animation: pulse-button 1.5s ease-in-out infinite;
}

@keyframes pulse-button {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7);
    }

    50% {
        box-shadow: 0 0 0 8px rgba(255, 255, 255, 0);
    }
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Thêm hiệu ứng corner accent (góc trang trí) */
.card__major .card__image::after {
    content: '';
    position: absolute;
    top: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
    background: linear-gradient( 135deg, rgba(255, 255, 255, 0.3) 0%, transparent 50% );
    border-radius: 0 var(--border-radius-md) 0 var(--border-radius-lg);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 2;
}

.card__major:hover .card__image::after {
    opacity: 1;
}

/* Responsive adjustments */
@media (max-width: 767px) {
    .card__major .card__body {
        padding: var(--spacing-sm) var(--spacing-md);
        bottom: 8px;
        left: 8px;
        right: 8px;
    }

        .card__major .card__body a {
            width: 32px;
            height: 32px;
        }

            .card__major .card__body a svg {
                width: 16px;
                height: 16px;
            }
}

/* Active state khi click */
.card__major:active {
    transform: translateY(-4px) scale(0.98);
}

    .card__major:active .card__body {
        transform: translateY(-2px);
    }

.swiper {
    width: 100%;
    height: 100%;
}

.list__events, .list__notifications {
    overflow-y: scroll;
    height: 524px;
    width: 100%;
    max-height: 524px;
    box-shadow: inset 0 -8px 16px -8px rgba(0,0,0,0.15);
    margin: 0;
    padding: 0;
}

.card__partner {
    display: flex !important;
    flex-direction: row;
    width: 300px !important;
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    background: white;
    position: relative;
    transition: all 0.4s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

    /* Hiệu ứng gradient overlay */
    .card__partner::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient( 135deg, rgba(55, 130, 245, 0.05) 0%, rgba(0, 40, 120, 0.05) 100% );
        opacity: 0;
        transition: opacity 0.4s ease;
        pointer-events: none;
    }

    .card__partner:hover::before {
        opacity: 1;
    }

    /* Hover effects */
    .card__partner:hover {
        transform: translateY(-5px);
        box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(55, 130, 245, 0.1);
        border-color: rgba(55, 130, 245, 0.2);
    }

    /* Image container */
    .card__partner .card__image {
        width: 30%;
        padding: var(--spacing-sm);
        overflow: hidden;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient( 135deg, rgba(248, 249, 250, 0.8), rgba(255, 255, 255, 0.8) );
        position: relative;
        transition: all 0.4s ease;
    }

        /* Decorative border */
        .card__partner .card__image::after {
            content: '';
            position: absolute;
            right: 0;
            top: 10%;
            bottom: 10%;
            width: 2px;
            background: linear-gradient( to bottom, transparent, rgba(55, 130, 245, 0.2), transparent );
            transition: all 0.4s ease;
        }

    .card__partner:hover .card__image::after {
        background: linear-gradient( to bottom, transparent, rgba(55, 130, 245, 0.5), transparent );
        box-shadow: 0 0 10px rgba(55, 130, 245, 0.3);
    }

    /* Image styling */
    .card__partner .card__image img {
        width: 100%;
        height: 100%;
        object-fit: contain;
        object-position: center;
        transition: all 0.4s ease;
        filter: grayscale(20%) brightness(1);
        padding: 5px;
    }

    .card__partner:hover .card__image img {
        transform: scale(1.1);
        filter: grayscale(0%) brightness(1.1);
    }

    /* Body content */
    .card__partner .card__body {
        width: 70%;
        font-weight: 600;
        display: flex;
        justify-content: center;
        align-items: center;
        padding: var(--spacing-md);
        color: var(--color-secondary);
        text-align: center;
        line-height: 1.4;
        font-size: var(--font-size-sm);
        position: relative;
        transition: all 0.4s ease;
    }

        /* Subtle background pattern */
        .card__partner .card__body::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 20% 30%, rgba(55, 130, 245, 0.03) 0%, transparent 50%), radial-gradient(circle at 80% 70%, rgba(0, 40, 120, 0.03) 0%, transparent 50%);
            pointer-events: none;
        }

    .card__partner:hover .card__body {
        color: var(--color-primary);
    }

    /* Hiệu ứng shine khi hover */
    .card__partner::after {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: linear-gradient( 45deg, transparent 30%, rgba(255, 255, 255, 0.3) 50%, transparent 70% );
        transform: rotate(45deg) translateX(-100%);
        transition: transform 0.6s ease;
        pointer-events: none;
    }

    .card__partner:hover::after {
        transform: rotate(45deg) translateX(100%);
    }

    /* Active state */
    .card__partner:active {
        transform: translateY(-2px) scale(0.98);
    }

/* Responsive - Vertical layout for smaller cards */
@media (max-width: 350px) {
    .card__partner {
        flex-direction: column;
        width: 250px !important;
    }

        .card__partner .card__image {
            width: 100%;
            min-height: 100px;
        }

            .card__partner .card__image::after {
                right: 10%;
                left: 10%;
                top: auto;
                bottom: 0;
                width: auto;
                height: 2px;
            }

        .card__partner .card__body {
            width: 100%;
            padding: var(--spacing-md);
        }
}

.list__gradute, .list__warning {
    max-height: 500px;
    height: 500px;
    overflow-y: auto;
    padding: 0 var(--spacing-sm) var(--spacing-sm) 0;
    background-color: white;
    box-shadow: inset 0 -20px 25px -15px rgba(0, 0, 0, 0.3);
}

    .list__gradute::-webkit-scrollbar,
    .list__warning::-webkit-scrollbar {
        width: 6px;
    }

    .list__gradute::-webkit-scrollbar-track,
    .list__warning::-webkit-scrollbar-track {
        background: #f1f1f1;
        border-radius: 10px;
    }

    .list__gradute::-webkit-scrollbar-thumb,
    .list__warning::-webkit-scrollbar-thumb {
        background: var(--color-primary);
        border-radius: 10px;
    }

        .list__gradute::-webkit-scrollbar-thumb:hover,
        .list__warning::-webkit-scrollbar-thumb:hover {
            background: #1565c0;
        }

.warning, .graduate__notification {
    position: relative;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
    border-radius: 12px;
    display: flex;
    flex-direction: row;
    align-items: center;
    padding: 1rem 1.25rem;
    gap: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.warning__content,
.graduate__content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.warning {
    height: calc((100% - 24px) / 4) !important;
    max-height: calc((100% - 24px) / 4) !important;
}

.graduate__notification {
    height: calc((100% - 32px) / 5) !important;
    max-height: calc((100% - 32px) / 5) !important;
}

    .warning::after, .graduate__notification::after {
        content: '';
        position: absolute;
        top: 0;
        right: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, rgba(25, 118, 210, 0.03) 0%, transparent 100%);
        opacity: 0;
        transition: opacity 0.3s ease;
        pointer-events: none;
    }

    .warning:hover::after, .graduate__notification:hover::after {
        opacity: 1;
    }

    .warning:hover, .graduate__notification:hover {
        box-shadow: 0 8px 24px rgba(25, 118, 210, 0.15);
        transform: translateY(-3px);
        border-color: var(--color-primary);
    }

        .warning:hover .warning__title, .graduate__notification:hover .graduate__title {
            color: var(--color-primary) !important;
        }

    .warning::before, .graduate__notification::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 4px;
        height: 100%;
        background: linear-gradient(180deg, var(--color-primary) 0%, #1565c0 100%);
        border-top-left-radius: 12px;
        border-bottom-left-radius: 12px;
        transition: width 0.3s ease;
    }

    .warning:hover::before, .graduate__notification:hover::before {
        width: 6px;
    }

    .warning .warning__title,
    .graduate__notification .graduate__title {
        width: 100%;
        color: var(--color-secondary);
        font-size: 1rem;
        font-weight: 600;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        -webkit-line-clamp: 2;
        line-clamp: 2;
        overflow: hidden;
        text-overflow: ellipsis;
        line-height: 1.5em;
        min-height: calc(1.5em * 2);
        max-height: calc(1.5em * 2);
    }

.warning .warning__title {
    -webkit-line-clamp: 3;
    line-clamp: 3;
    min-height: calc(1.5em * 3);
    max-height: calc(1.5em * 3);
}

@media (min-width: 992px) {
    .graduate__notification .graduate__title {
        font-size: 1.05rem;
        -webkit-line-clamp: 1;
        line-clamp: 1;
    }

    .warning .warning__title {
        font-size: 1.05rem;
        -webkit-line-clamp: 2;
        line-clamp: 2;
    }
}

/* Time display for warning and graduate notification */
.warning .warning__time,
.graduate__notification .graduate__time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #6c757d;
    font-size: 0.875rem;
    font-weight: 500;
    margin: 0;
    transition: color 0.3s ease;
}

.warning:hover .warning__time,
.graduate__notification:hover .graduate__time {
    color: var(--color-primary);
}

.warning .warning__time svg,
.graduate__notification .graduate__time svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
    flex-shrink: 0;
}

.warning .warning__link, .graduate__notification .graduate__link {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(25, 118, 210, 0.05);
    border: 1.5px solid rgba(25, 118, 210, 0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Hover vào card cha → arrow button có hiệu ứng */
.warning:hover .warning__link,
.graduate__notification:hover .graduate__link {
    background: rgba(25, 118, 210, 0.1);
    border-color: var(--color-primary);
    transform: translateX(3px);
    animation: pulse-button-white 1.5s ease-in-out infinite;
}

/* Hover trực tiếp vào arrow → icon di chuyển */
.warning .warning__link:hover svg,
.graduate__notification .graduate__link:hover svg {
    transform: translateX(3px);
}

.warning .warning__link:active, .graduate__notification .graduate__link:active {
    transform: translateX(1px);
}

.warning .warning__link a, .graduate__notification .graduate__link a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    position: relative;
}

.warning a svg, .graduate__notification a svg {
    fill: var(--color-primary);
    width: 16px !important;
    height: 16px !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.8;
}

/* Hover vào card cha hoặc arrow → icon opacity tăng */
.warning:hover .warning__link svg,
.graduate__notification:hover .graduate__link svg,
.warning .warning__link:hover svg,
.graduate__notification .graduate__link:hover svg {
    opacity: 1;
}

.warning::after, .graduate__notification::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
}

/* ===== CARD GRADUATE ===== */
.card__gradute {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: box-shadow 0.3s ease;
}

    .card__gradute:hover {
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    }

    .card__gradute .card__header {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        border-bottom: 1px solid #dee2e6;
        position: relative;
        padding-bottom: var(--spacing-sm);
        background-color: white;
        border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
    }

        .card__gradute .card__header::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--color-primary) 0%, #1565c0 50%, var(--color-primary) 100%);
        }

        .card__gradute .card__header .header__title {
            padding: 0.75rem 1.25rem;
            border-radius: 10px;
            width: 100%;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-secondary);
            background: white;
            border: 2px solid transparent;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
            position: relative;
            overflow: hidden;
            text-align: center;
        }

            .card__gradute .card__header .header__title::before {
                content: '';
                position: absolute;
                top: 0;
                left: -100%;
                width: 100%;
                height: 100%;
                background: linear-gradient(90deg, transparent, rgba(25, 118, 210, 0.1), transparent);
                transition: left 0.5s ease;
            }

            .card__gradute .card__header .header__title:hover::before {
                left: 100%;
            }

            .card__gradute .card__header .header__title:hover {
                background: #f8f9fa;
                border-color: #e9ecef;
                transform: translateY(-2px);
                box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            }

@media (min-width: 992px) {
    .card__gradute .card__header .header__title {
        width: auto;
        flex: 1;
    }

    .card__gradute .card__header {
        gap: 0.75rem;
    }
}

.card__gradute .card__header .header__title.active {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1565c0 100%);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(25, 118, 210, 0.3);
    transform: translateY(-2px);
}

    .card__gradute .card__header .header__title.active::before {
        display: none;
    }


/* Mỗi tab nội dung */
.card__gradute .card__body > div {
    display: none;
    animation: fadeIn 0.4s ease;
}

    .card__gradute .card__body > div.active {
        display: block;
    }

/* Hiệu ứng */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== FOOTER ===== */
.footer__title {
    padding-left: var(--spacing-md);
    border-left: 6px solid white;
    font-size: large;
    color: white;
    font-weight: bold;
    text-transform: uppercase;
}

footer svg {
    fill: white;
    width: 25px;
    min-width: 25px;
    margin-right: var(--spacing-sm);
}

footer a {
    color: white;
}

/* ===== SCROLLBAR STYLING ===== */
.list__events::-webkit-scrollbar,
.list__notifications::-webkit-scrollbar,
.list__gradute::-webkit-scrollbar,
.list__warning::-webkit-scrollbar {
    width: 8px;
}

.list__events::-webkit-scrollbar-track,
.list__notifications::-webkit-scrollbar-track,
.list__gradute::-webkit-scrollbar-track,
.list__warning::-webkit-scrollbar-track {
    background: var(--color-gray);
    border-radius: var(--border-radius-sm);
}

.list__events::-webkit-scrollbar-thumb,
.list__notifications::-webkit-scrollbar-thumb,
.list__gradute::-webkit-scrollbar-thumb,
.list__warning::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--border-radius-sm);
    transition: background 0.3s ease;
}

    .list__events::-webkit-scrollbar-thumb:hover,
    .list__notifications::-webkit-scrollbar-thumb:hover,
    .list__gradute::-webkit-scrollbar-thumb:hover,
    .list__warning::-webkit-scrollbar-thumb:hover {
        background: var(--color-secondary);
    }

/* ===== PRINT STYLES ===== */
@media print {
    nav,
    .hero__btn,
    .btn__lg--primary,
    .btn__lg--secondary,
    .navbar__toggle {
        display: none !important;
    }

    section {
        page-break-inside: avoid;
    }

    a {
        text-decoration: underline;
    }
}

/* ===== ACCESSIBILITY ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus visible for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== SCROLL TO TOP BUTTON ===== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary) 0%, #1565c0 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 15px rgba(25, 118, 210, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 9999;
}

    .scroll-to-top.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .scroll-to-top:hover {
        background: linear-gradient(135deg, #1565c0 0%, var(--color-primary) 100%);
        box-shadow: 0 6px 20px rgba(25, 118, 210, 0.4);
        transform: translateY(-3px);
    }

    .scroll-to-top:active {
        transform: translateY(-1px);
        box-shadow: 0 2px 10px rgba(25, 118, 210, 0.3);
    }

/* Responsive button size */
@media (max-width: 767.98px) {
    .scroll-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
        font-size: 18px;
    }
}

/* ===== STICKY HEADER ON MOBILE ===== */
@media (max-width: 991.98px) {
    .site-header {
        transition: box-shadow 0.3s ease;
    }

        .site-header.sticky {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            width: 100%;
            background: white;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            z-index: 1000;
        }
}
.text-secondary {
    color: #343a40 !important;
}
.row-news {
    display: flex;
    gap: 1rem;
}
.event--main,
.list__events {
    flex: 1;
    max-height: 524px;
    overflow: hidden;
}