:root {
    --primary-red: #A80000;
    --primary-gold: #D4AF37;
    --heritage-emerald: #0F382C;
    --deep-navy: #0A192F;
    --neutral-bg: #FAFAFA;
    --white: #FFFFFF;
    --text-main: #333333;
    --text-muted: #666666;
    
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    
    --transition: all 0.3s ease;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-main);
    background-color: var(--neutral-bg);
    line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--deep-navy);
}

/* Utility */
.section {
    padding: 100px 5%;
    max-width: 1400px;
    margin: 0 auto;
}
.alt-bg {
    background-color: var(--white);
}
.section-header {
    text-align: center;
    margin-bottom: 60px;
}
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: 15px;
}
.title-divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--primary-red), var(--primary-gold));
    margin: 0 auto 20px;
    border-radius: 2px;
}
.section-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255,255,255,0.2);
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    transition: var(--transition);
}
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    padding: 10px 0;
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    max-width: 1400px;
    margin: 0 auto;
    transition: padding 0.3s ease;
}
.navbar.scrolled .nav-container {
    padding: 10px 5%;
}
.logos {
    display: flex;
    align-items: center;
    gap: 20px;
}
.logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    color: var(--primary-red);
    line-height: 1.2;
    white-space: nowrap;
}
.logo-text span {
    display: block;
    color: var(--primary-gold);
    font-size: 0.8rem;
}
.logo-text.right {
    border-left: 2px solid var(--primary-gold);
    padding-left: 20px;
}
.nav-links {
    display: flex;
    gap: 20px;
}
.nav-links a {
    text-decoration: none;
    color: var(--deep-navy);
    font-weight: 500;
    font-size: 0.95rem;
    white-space: nowrap;
    transition: var(--transition);
    position: relative;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--primary-red);
    transition: var(--transition);
}
.nav-links a:hover {
    color: var(--primary-red);
}
.nav-links a:hover::after {
    width: 100%;
}
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-red);
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 5% 60px;
    overflow: hidden;
}
.hero.banner-only {
    min-height: unset;
    height: auto;
    padding: 0;
    display: block;
}
.hero.banner-only .hero-bg {
    position: relative;
    width: 100%;
    height: auto;
}
.hero.banner-only .hero-img {
    position: relative;
    width: 100%;
    height: auto;
    object-fit: contain;
    transform: none;
    animation: none;
    display: block;
}
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}
.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transform: scale(1.05);
    animation: slowZoom 20s infinite alternate ease-in-out;
}
@keyframes slowZoom {
    0% { transform: scale(1.05); }
    100% { transform: scale(1.15); }
}
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.15); /* Rất nhẹ để giữ nguyên hình gốc */
}
.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 1000px;
    color: var(--white);
    animation: fadeInUp 1s ease-out forwards;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8), 0 0 20px rgba(0, 0, 0, 0.5);
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.badge {
    display: inline-block;
    padding: 8px 24px;
    background: rgba(212, 175, 55, 0.2);
    border: 1px solid var(--primary-gold);
    border-radius: 50px;
    color: var(--primary-gold);
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 20px;
}
.hero-title {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--white);
    text-shadow: 0 4px 15px rgba(0,0,0,0.3);
}
.hero-title span {
    font-size: 2.2rem;
    color: var(--primary-gold);
    font-weight: 600;
}
.hero-subtitle {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 50px;
    opacity: 0.9;
    font-weight: 300;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 50px;
}
.metric-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 25px 15px;
    border-radius: 16px;
    transition: var(--transition);
}
.metric-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-gold);
}
.metric-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-gold);
    margin-bottom: 10px;
    line-height: 1;
}
.metric-label {
    font-size: 0.9rem;
    font-weight: 500;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 35px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    font-size: 1.1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.hero-ctas {
    display: flex;
    gap: 20px;
    justify-content: center;
}
.btn-primary {
    background: var(--primary-red);
    color: var(--white);
    box-shadow: 0 8px 25px rgba(168, 0, 0, 0.4);
}
.btn-primary:hover {
    background: #8b0000;
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(168, 0, 0, 0.5);
}
.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}
.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-red);
    transform: translateY(-3px);
}

/* Achievements */
.tabs-container {
    max-width: 1000px;
    margin: 0 auto;
}
.tabs-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}
.tab-btn {
    padding: 12px 25px;
    background: var(--white);
    border: 1px solid #ddd;
    border-radius: 50px;
    font-family: var(--font-body);
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}
.tab-btn:hover {
    border-color: var(--primary-gold);
    color: var(--primary-gold);
}
.tab-btn.active {
    background: var(--primary-red);
    color: var(--white);
    border-color: var(--primary-red);
    box-shadow: 0 4px 15px rgba(168, 0, 0, 0.3);
}

.tabs-content {
    background: var(--white);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-soft);
}
.tab-pane {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}
.tab-pane.active {
    display: block;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.season-highlight {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid #eee;
}
.season-highlight h3 {
    font-size: 1.8rem;
    color: var(--heritage-emerald);
    margin-bottom: 10px;
}
.season-highlight p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.awards-list {
    display: grid;
    gap: 20px;
}
.award-item {
    display: flex;
    align-items: center;
    gap: 30px;
    padding: 25px;
    border-radius: 16px;
    background: var(--neutral-bg);
    border-left: 5px solid transparent;
    transition: var(--transition);
}
.award-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-soft);
    background: var(--white);
}

.award-item.gold { border-color: #FFD700; }
.award-item.silver { border-color: #C0C0C0; }
.award-item.bronze { border-color: #CD7F32; }
.award-item.merit { border-color: var(--primary-red); }
.award-item.special { border-color: var(--heritage-emerald); }

.award-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--white);
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    flex-shrink: 0;
}
.gold .award-icon { color: #FFD700; }
.silver .award-icon { color: #C0C0C0; }
.bronze .award-icon { color: #CD7F32; }
.merit .award-icon { color: var(--primary-red); }
.special .award-icon { color: var(--heritage-emerald); }

.award-avatar {
    flex-shrink: 0;
    width: 200px;
    height: 200px;
}
.award-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 16px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    display: block;
    object-fit: cover;
    object-position: top;
    border: 3px solid transparent;
}
.gold .award-avatar img { border-color: #FFD700; }
.silver .award-avatar img { border-color: #C0C0C0; }
.bronze .award-avatar img { border-color: #CD7F32; }
.merit .award-avatar img { border-color: var(--primary-red); }
.special .award-avatar img { border-color: var(--heritage-emerald); }

/* Keep original proportions for Season 1 */
#season1 .award-avatar {
    width: 240px;
    height: auto;
}
#season1 .award-avatar img {
    height: auto;
    border-radius: 12px;
    object-fit: contain;
    object-position: center;
}

.award-details h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}
.award-details h4 span {
    font-weight: 400;
    color: var(--text-muted);
    font-size: 1rem;
    font-family: var(--font-body);
}
.award-main {
    color: var(--primary-red);
    font-size: 1.1rem;
    margin-bottom: 8px;
}
.award-sub {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

/* Sponsors */
.gratitude-content {
    max-width: 900px;
    margin: 0 auto;
}
.gratitude-card {
    background: linear-gradient(135deg, var(--deep-navy), var(--heritage-emerald));
    color: var(--white);
    padding: 50px;
    border-radius: 24px;
    text-align: center;
    box-shadow: var(--shadow-hover);
    margin-bottom: 40px;
}
.gratitude-card .icon-wrap {
    font-size: 3rem;
    color: var(--primary-gold);
    margin-bottom: 20px;
}
.director-avatar {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 25px;
    border: 4px solid var(--primary-gold);
    display: block;
    box-shadow: var(--shadow-soft);
}
.gratitude-card p {
    font-size: 1.2rem;
    margin-bottom: 20px;
}
.gratitude-card .highlight-text {
    font-weight: 300;
    opacity: 0.9;
    font-size: 1.1rem;
    line-height: 1.8;
}
.gratitude-logos {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
}
.g-item {
    background: var(--white);
    padding: 20px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
    font-weight: 600;
    color: var(--deep-navy);
    text-align: center;
    transition: var(--transition);
}
.g-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    color: var(--primary-red);
}

/* Organizers */
.organizer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 40px auto 0;
}
.organizer-card {
    background: var(--white);
    border-radius: 20px;
    padding: 20px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    border: 1px solid rgba(168, 0, 0, 0.05);
}
.organizer-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(168, 0, 0, 0.2);
}
.organizer-avatar {
    width: 240px;
    height: 240px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 15px;
    border: 3px solid var(--primary-gold);
}
.organizer-card h4 {
    color: var(--primary-red);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 5px;
}

/* Faculty Section */
.dark {
    background-color: var(--deep-navy);
    color: var(--white);
}
.section-header.light .section-title {
    color: var(--primary-gold);
}
.section-header.light .section-desc {
    color: var(--primary-gold);
}
.light-divider {
    background: linear-gradient(to right, var(--primary-gold), #fff);
}
.faculty-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    max-width: 1100px;
    margin: 0 auto;
}
.faculty-container.single-column {
    grid-template-columns: 1fr;
    max-width: 800px;
}
.faculty-box {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 40px;
    border-radius: 24px;
    backdrop-filter: blur(10px);
}
.faculty-box h3 {
    color: var(--primary-gold);
    font-size: 1.5rem;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 15px;
}
.faculty-box p {
    color: rgba(255,255,255,0.85);
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
}
.faculty-box strong {
    color: var(--white);
}

/* Coaches Section */
.coaches-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 40px auto 0;
}
.coach-poster-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
}
.coach-poster-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
    border-color: rgba(212, 175, 55, 0.3);
}
.poster-wrap {
    width: 100%;
    aspect-ratio: 3/4;
    overflow: hidden;
    border-bottom: 3px solid var(--primary-gold);
}
.poster-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform 0.5s ease;
}
.coach-poster-card:hover .poster-img {
    transform: scale(1.05);
}
.coach-info {
    padding: 25px;
    text-align: center;
}
.coach-info h4 {
    color: var(--primary-gold);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 10px;
}
.coach-info p {
    color: var(--primary-gold);
    font-size: 1.05rem;
    line-height: 1.6;
    margin: 0;
}
.coach-item h4 {
    color: var(--white);
    font-size: 1.2rem;
    margin-bottom: 10px;
}

/* Testimonials */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 40px auto 0;
}
.t-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 24px;
    box-shadow: var(--shadow-soft);
    position: relative;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.t-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}
.quote-icon {
    position: absolute;
    top: 30px;
    right: 30px;
    font-size: 2rem;
    color: rgba(212, 175, 55, 0.2);
}
.quote-text {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-main);
    margin-bottom: 30px;
    position: relative;
    z-index: 1;
}
.t-author {
    display: flex;
    align-items: center;
    gap: 15px;
}
.author-img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-gold);
}
.author-placeholder {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--neutral-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1.5rem;
    border: 2px solid #ddd;
}
.author-info h5 {
    font-size: 1rem;
    margin-bottom: 4px;
}
.author-info span {
    font-size: 0.85rem;
    color: var(--primary-red);
    font-weight: 500;
}

/* Footer */
.footer {
    background-color: var(--primary-red);
    color: var(--white);
    padding: 80px 5% 40px;
    text-align: center;
}
.footer-org {
    color: var(--primary-gold);
    font-size: 1.8rem;
    margin-bottom: 10px;
}
.footer-sub {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 30px;
}
.footer-contact {
    margin-bottom: 40px;
    font-size: 1.1rem;
}
.footer-contact i {
    color: var(--primary-gold);
    margin-right: 10px;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.2);
    padding-top: 30px;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Media Gallery */
.season-media {
    margin-top: 50px;
    padding-top: 40px;
    border-top: 1px dashed #ddd;
}
.media-title {
    font-size: 1.4rem;
    color: var(--deep-navy);
    margin-bottom: 25px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}
.media-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}
.media-item {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    aspect-ratio: 4/3;
}
.media-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1), filter 0.5s ease;
}
.media-item:hover img {
    transform: scale(1.12) rotate(3deg);
    filter: brightness(1.05);
}
.media-video {
    margin: 0 auto;
    max-width: 800px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-hover);
    background: #000;
}
.media-video video {
    width: 100%;
    display: block;
}

/* Responsive */
@media (max-width: 992px) {
    .hero-title { font-size: 2.8rem; }
    .hero-title span { font-size: 1.8rem; }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); }
    .faculty-container { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        align-items: center;
        padding-top: 40px;
        transition: var(--transition);
    }
    .nav-links.active { left: 0; }
    .mobile-menu-btn { display: block; }
    
    .hero-title { font-size: 2.2rem; }
    .hero-title span { font-size: 1.5rem; }
    .hero-ctas { flex-direction: column; }
    
    .section { padding: 60px 5%; }
    .media-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .metrics-grid { grid-template-columns: 1fr; }
    .tab-btn { width: 100%; }
    .award-item { flex-direction: column; text-align: center; align-items: center; }
    .media-grid { grid-template-columns: 1fr; }
}