@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700;800;900&family=Noto+Sans:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #0F5E8C;
    --primary-dark: #0F172A;
    --secondary-color: #D69E2E;
    --background: #F8FAFC;
    --surface: #FFFFFF;
    --surface-soft: #EAF6FB;
    --text-primary: #020617;
    --text-secondary: #475569;
    --border: #D9E7EF;
    --success: #157F5B;
    --danger: #B42318;
    --shadow-sm: 0 8px 20px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 16px 40px rgba(15, 23, 42, 0.1);
    --shadow-lg: 0 22px 60px rgba(15, 23, 42, 0.14);
    --radius: 8px;
    --transition: 180ms ease;
}

body {
    background: var(--background);
    color: var(--text-primary);
    font-family: 'Be Vietnam Pro', 'Noto Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.65;
}

.contest-home {
    max-width: 1180px;
    margin: 0 auto;
}

.contest-home h1,
.contest-home h2,
.contest-home h3,
.modal-title {
    color: var(--primary-dark);
    font-family: 'Be Vietnam Pro', 'Noto Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    letter-spacing: 0;
}

.hero-section {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.75fr);
    gap: 2rem;
    align-items: center;
    padding: clamp(1.5rem, 3vw, 3rem);
    background:
        linear-gradient(135deg, rgba(234, 246, 251, 0.95), rgba(255, 255, 255, 0.96)),
        radial-gradient(circle at 10% 10%, rgba(214, 158, 46, 0.18), transparent 28%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    animation: uiFadeUp 520ms ease both;
}

.eyebrow,
.section-kicker {
    color: var(--primary-color);
    display: inline-flex;
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}

.hero-copy h1 {
    font-size: clamp(2.1rem, 4.5vw, 4.4rem);
    font-weight: 900;
    line-height: 1.08;
    margin-bottom: 1.25rem;
    max-width: 820px;
}

.hero-lead {
    color: var(--text-secondary);
    font-size: clamp(1.05rem, 2vw, 1.28rem);
    margin-bottom: 1.5rem;
    max-width: 760px;
}

.hero-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
    margin: 1.5rem 0;
}

.hero-meta div,
.time-box,
.info-panel,
.prize-card,
.contact-card,
.status-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.hero-meta div {
    padding: 1rem;
}

.hero-meta div:hover,
.info-panel:hover,
.prize-card:hover,
.contact-card:hover {
    border-color: rgba(15, 94, 140, 0.28);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.meta-label,
.time-box span,
.counter span {
    color: var(--text-secondary);
    display: block;
    font-size: 0.82rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
}

.hero-meta strong {
    color: var(--primary-dark);
    font-size: 1rem;
}

.hero-visual {
    min-height: 420px;
    position: relative;
}

.hero-visual img {
    border-radius: var(--radius);
    height: 100%;
    min-height: 420px;
    object-fit: cover;
    width: 100%;
    box-shadow: var(--shadow-sm);
}

.hero-badge {
    align-items: center;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    bottom: 1rem;
    box-shadow: var(--shadow-sm);
    color: var(--primary-dark);
    display: flex;
    font-weight: 800;
    gap: 0.6rem;
    left: 1rem;
    padding: 0.9rem 1rem;
    position: absolute;
    right: 1rem;
}

.hero-badge i {
    color: var(--success);
    font-size: 1.4rem;
}

.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.6rem;
}

.btn-thamgia,
.btn-thele,
.btn-submit {
    align-items: center;
    border-radius: var(--radius);
    cursor: pointer;
    display: inline-flex;
    font-weight: 900;
    justify-content: center;
    min-height: 48px;
    padding: 0.85rem 1.4rem;
    text-decoration: none;
    transition: background-color var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
}

.btn-thamgia {
    background: var(--primary-color);
    border: 1px solid var(--primary-color);
    color: #FFFFFF;
}

.btn-thamgia:hover,
.btn-thamgia:focus-visible {
    background: #0A4E76;
    border-color: #0A4E76;
    box-shadow: 0 0 0 4px rgba(15, 94, 140, 0.18);
    color: #FFFFFF;
}

.btn-thamgia.disabled {
    background: #94A3B8;
    border-color: #94A3B8;
    cursor: not-allowed;
}

.btn-thele {
    background: #FFFFFF;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-thele:hover,
.btn-thele:focus-visible {
    background: var(--surface-soft);
    box-shadow: 0 0 0 4px rgba(15, 94, 140, 0.12);
    color: var(--primary-dark);
}

.status-section,
.info-grid,
.rankings,
.faq,
.prizes,
.contact-info {
    margin-top: 2rem;
}

.status-card {
    padding: clamp(1.25rem, 2vw, 2rem);
    box-shadow: var(--shadow-sm);
    animation: uiFadeUp 520ms ease 80ms both;
}

.status-card h2,
.section-heading h2 {
    font-size: clamp(1.8rem, 3vw, 2.7rem);
    margin-bottom: 1.2rem;
}

.counter {
    display: grid;
    gap: 0.8rem;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-bottom: 1.25rem;
}

.counter-item {
    background: linear-gradient(145deg, #0F172A, #0F5E8C);
    border-radius: var(--radius);
    color: #FFFFFF;
    padding: 1.1rem;
    text-align: center;
}

.counter-item p {
    color: #FFFFFF;
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 900;
    line-height: 1;
    margin: 0 0 0.35rem;
}

.counter-item span {
    color: #CBD5E1;
    margin: 0;
}

.timeline-grid,
.info-grid,
.prize-grid {
    display: grid;
    gap: 1rem;
}

.timeline-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.time-box {
    padding: 1rem;
}

.time-box strong {
    color: var(--primary-dark);
    font-size: 1.08rem;
}

.section-heading {
    margin-bottom: 1rem;
}

.info-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-grid .section-heading,
.rankings .section-heading,
.faq .section-heading,
.prizes .section-heading {
    grid-column: 1 / -1;
}

.info-panel,
.prize-card,
.contact-card {
    padding: 1.35rem;
    box-shadow: var(--shadow-sm);
}

.info-panel i,
.prize-card-header i,
.contact-card > i {
    color: var(--primary-color);
    font-size: 1.65rem;
    margin-bottom: 0.9rem;
}

.info-panel h3,
.prize-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.7rem;
}

.info-panel p,
.contact-card p,
.accordion-body {
    color: var(--text-secondary);
}

.ranking-card,
.widget-chart {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.ranking-title,
.widget-chart .widget-title {
    background: var(--primary-dark);
    color: #FFFFFF !important;
    font-family: 'Be Vietnam Pro', 'Noto Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 1rem;
    font-weight: 900;
    margin: 0;
    padding: 1rem 1.15rem;
}

.accordion-item {
    border: 1px solid var(--border);
    border-radius: var(--radius) !important;
    box-shadow: var(--shadow-sm);
    margin-bottom: 0.85rem;
    overflow: hidden;
}

.accordion-button {
    background: #FFFFFF;
    color: var(--primary-dark);
    font-weight: 900;
    padding: 1rem 1.15rem;
}

.accordion-button:not(.collapsed) {
    background: var(--primary-dark);
    color: #FFFFFF;
}

.accordion-button:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(15, 94, 140, 0.16);
}

.accordion-body {
    background: #FFFFFF;
    padding: 1.25rem;
}

.faq-list li {
    margin-bottom: 0.7rem;
}

.faq-list a {
    color: var(--primary-dark);
    display: inline-flex;
    font-weight: 700;
    gap: 0.15rem;
    text-decoration: none;
}

.faq-list a:hover,
.faq-list a:focus-visible {
    color: var(--primary-color);
    text-decoration: underline;
}

.prize-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.prize-card {
    background:
        linear-gradient(180deg, rgba(234, 246, 251, 0.72), rgba(255, 255, 255, 1) 38%),
        #FFFFFF;
    min-height: 100%;
    position: relative;
    overflow: hidden;
}

.prize-card::after {
    background: linear-gradient(180deg, #D69E2E, #0F5E8C);
    content: "";
    inset: 0 auto 0 0;
    position: absolute;
    width: 4px;
}

.prize-card-header {
    align-items: center;
    border-bottom: 1px solid var(--border);
    display: flex;
    gap: 0.75rem;
    margin: -0.2rem 0 0.9rem;
    padding-bottom: 0.9rem;
    position: relative;
    z-index: 1;
}

.prize-card-header i {
    margin: 0;
}

.prize-card ul {
    margin: 0;
    padding: 0;
}

.prize-card li {
    align-items: center;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.95rem 0;
    position: relative;
    z-index: 1;
}

.prize-card li:last-child {
    border-bottom: 0;
}

.prize-card li span {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 700;
    padding: 0;
}

.prize-card li strong {
    background: #EAF6FB;
    border-radius: 999px;
    color: var(--primary-color);
    min-width: 76px;
    padding: 0.42rem 0.75rem;
    text-align: center;
}

.contact-card {
    align-items: flex-start;
    display: flex;
    gap: 1rem;
}

.modal-header {
    background: var(--primary-dark);
    color: #FFFFFF;
}

.modal-header .modal-title {
    color: #FFFFFF;
}

@media (max-width: 992px) {
    .hero-section {
        grid-template-columns: 1fr;
    }

    .hero-visual,
    .hero-visual img {
        min-height: 320px;
    }

    .info-grid,
    .timeline-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .contest-home {
        padding: 0 0.25rem;
    }

    .hero-meta,
    .counter,
    .timeline-grid,
    .info-grid,
    .prize-grid {
        grid-template-columns: 1fr;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn-thamgia,
    .btn-thele {
        width: 100%;
    }

    .hero-visual,
    .hero-visual img {
        min-height: 260px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}

@keyframes uiFadeUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}