/* VIQRC Hong Kong Cup 2026 - Mobile-first responsive styles */
:root {
    --color-primary: #c8102e;
    --color-primary-dark: #9a0c23;
    --color-secondary: #00205b;
    --color-accent: #0072ce;
    --color-bg: #f5f5f5;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-muted: #555;
    --font-sans: 'Outfit', 'Noto Sans TC', system-ui, sans-serif;
    --font-body: 'Noto Sans TC', 'Outfit', system-ui, sans-serif;
    --container-max: 960px;
    --header-height: 56px;
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 20px rgba(0,0,0,0.12);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-surface);
    box-shadow: var(--shadow);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--header-height);
}
.logo {
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--color-secondary);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 60%;
}
.logo:hover { color: var(--color-primary); }
.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}
.nav-toggle span {
    display: block;
    height: 2px;
    background: var(--color-secondary);
    border-radius: 1px;
    transition: transform 0.2s, opacity 0.2s;
}
.site-header.is-open .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.site-header.is-open .nav-toggle span:nth-child(2) { opacity: 0; }
.site-header.is-open .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}
.main-nav { display: none; }
.site-header.is-open .main-nav { display: block; }
.main-nav ul {
    list-style: none;
    margin: 0;
    padding: var(--space-md) 0;
}
.main-nav a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--radius);
}
.main-nav a:hover, .main-nav a.active { background: var(--color-bg); color: var(--color-primary); }
.nav-cta { font-weight: 600; color: var(--color-primary) !important; }
.lang-switch { margin-top: var(--space-sm); padding-top: var(--space-sm); border-top: 1px solid #eee; }
.lang-switch a { display: inline-block; }
.lang-switch .active { font-weight: 600; color: var(--color-secondary); }

@media (min-width: 768px) {
    .nav-toggle { display: none; }
    .main-nav { display: block; }
    .main-nav ul {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: var(--space-xs);
        padding: 0;
    }
    .main-nav li { margin: 0; }
    .lang-switch { margin-top: 0; padding-top: 0; border-top: none; margin-left: var(--space-sm); }
}

/* Main */
.main-content { min-height: calc(100vh - var(--header-height) - 120px); padding-bottom: var(--space-2xl); }

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--color-secondary) 0%, #003366 100%);
    color: #fff;
    padding: var(--space-2xl) 0;
    text-align: center;
}
.hero h1 {
    margin: 0 0 var(--space-sm);
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.3;
}
.hero-subtitle {
    margin: 0 0 var(--space-xs);
    font-size: 1rem;
    opacity: 0.95;
}
.hero-meta {
    margin: 0 0 var(--space-lg);
    font-size: 0.95rem;
    opacity: 0.9;
}
.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
}
@media (min-width: 768px) {
    .hero { padding: var(--space-2xl) 0; }
    .hero h1 { font-size: 2rem; }
    .hero-subtitle { font-size: 1.15rem; }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius);
    transition: background 0.2s, transform 0.1s;
    border: none;
    cursor: pointer;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; }
.btn-secondary {
    background: var(--color-surface);
    color: var(--color-secondary);
    box-shadow: var(--shadow);
}
.btn-secondary:hover { background: #eee; color: var(--color-secondary); }

/* Sections */
.section {
    padding: var(--space-xl) 0;
}
.section:nth-child(even) { background: var(--color-surface); }
.section h2 {
    margin: 0 0 var(--space-lg);
    font-family: var(--font-sans);
    font-size: 1.35rem;
    color: var(--color-secondary);
}
.section p { margin: 0 0 var(--space-md); }
.section ul { margin: 0 0 var(--space-md); padding-left: 1.25rem; }
.section li { margin-bottom: var(--space-xs); }
.link-cta {
    font-weight: 600;
    color: var(--color-accent);
    text-decoration: none;
}
.link-cta:hover { text-decoration: underline; }

/* Info grid (event details) */
.info-grid {
    display: grid;
    gap: var(--space-sm) var(--space-lg);
    margin: 0;
}
.info-grid dt {
    font-weight: 600;
    color: var(--color-text-muted);
}
.info-grid dd { margin: 0; }
@media (min-width: 600px) {
    .info-grid { grid-template-columns: auto 1fr; }
}

.organizer-list {
    list-style: none;
    padding-left: 0;
    margin: var(--space-md) 0;
}
.organizer-list li { margin-bottom: var(--space-sm); }

/* Awards table */
.table-wrap {
    overflow-x: auto;
    margin-top: var(--space-md);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.awards-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.awards-table th,
.awards-table td {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    border-bottom: 1px solid #eee;
}
.awards-table th {
    background: var(--color-secondary);
    color: #fff;
    font-weight: 600;
}
.awards-table tbody tr:hover { background: rgba(0,0,0,0.02); }
.awards-table td:first-child { font-weight: 500; }

/* Footer */
.site-footer {
    background: var(--color-secondary);
    color: #fff;
    padding: var(--space-xl) 0 var(--space-lg);
    margin-top: var(--space-2xl);
}
.site-footer a { color: #b3d4fc; text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.footer-contact h2 {
    margin: 0 0 var(--space-md);
    font-size: 1.1rem;
}
.footer-contact p { margin: 0 0 var(--space-sm); }
.footer-copy {
    margin: var(--space-lg) 0 0;
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255,255,255,0.2);
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Invitational page */
.invitational-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    padding: var(--space-2xl) 0;
    text-align: center;
}
.invitational-hero h1 { margin: 0 0 var(--space-sm); font-size: 1.5rem; }
.invitational-hero .lead { margin: 0; font-size: 1.05rem; opacity: 0.95; }
@media (min-width: 768px) {
    .invitational-hero h1 { font-size: 2rem; }
}
.cards {
    display: grid;
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}
.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: var(--space-lg);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--color-accent);
}
.card h3 { margin: 0 0 var(--space-sm); color: var(--color-secondary); font-size: 1.2rem; }
.card .date { font-weight: 600; color: var(--color-primary); margin-bottom: var(--space-sm); }
.card p { margin: 0 0 var(--space-md); }
.card p:last-child { margin-bottom: 0; }
.invitational-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}
@media (min-width: 768px) {
    .cards { grid-template-columns: 1fr 1fr; }
}

/* Register form */
.register-intro {
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background: #e8f4fc;
    border-radius: var(--radius);
    border-left: 4px solid var(--color-accent);
}
.form-block {
    max-width: 560px;
    margin: 0 auto var(--space-xl);
    padding: var(--space-xl);
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}
.form-group {
    margin-bottom: var(--space-lg);
}
.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
    color: var(--color-text);
}
.form-group label .required { color: var(--color-primary); }
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-body);
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: var(--radius);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0,114,206,0.15);
}
.form-group textarea { min-height: 100px; resize: vertical; }
.form-group .hint { font-size: 0.85rem; color: var(--color-text-muted); margin-top: var(--space-xs); }
.form-error { font-size: 0.9rem; color: var(--color-primary); margin-top: var(--space-xs); }
.form-actions { margin-top: var(--space-xl); }
.form-actions .btn { min-width: 140px; }
.msg {
    padding: var(--space-lg);
    border-radius: var(--radius);
    margin-bottom: var(--space-lg);
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}
.msg.success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.msg.error { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }

/* Tournament info page */
.tournament-hero {
    background: linear-gradient(135deg, var(--color-secondary) 0%, #003366 100%);
    color: #fff;
    padding: var(--space-xl) 0;
    text-align: center;
}
.tournament-hero h1 {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.45;
}
@media (min-width: 768px) {
    .tournament-hero { padding: var(--space-2xl) 0; }
    .tournament-hero h1 { font-size: 1.5rem; }
}
.section-tournament-quick { padding-top: var(--space-lg); padding-bottom: 0; }
.tournament-quick-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: var(--space-md);
}
@media (min-width: 600px) {
    .tournament-quick-links { grid-template-columns: repeat(3, 1fr); }
}
.tournament-quick-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
    padding: var(--space-lg);
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-decoration: none;
    color: var(--color-text);
    border: 2px solid transparent;
    transition: border-color 0.2s, box-shadow 0.2s;
    height: 100%;
}
.tournament-quick-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
    color: var(--color-text);
}
.tournament-quick-card--info {
    border-left: 4px solid var(--color-primary);
}
.tournament-quick-title {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--color-secondary);
}
.tournament-quick-meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}
.tournament-prose h2 {
    margin-top: var(--space-xl);
}
.tournament-prose h2:first-child { margin-top: 0; }
.tournament-subheading {
    margin: var(--space-xl) 0 var(--space-md);
    font-family: var(--font-sans);
    font-size: 1.15rem;
    color: var(--color-secondary);
}
.tournament-basic-list {
    list-style: none;
    padding-left: 0;
    margin: 0 0 var(--space-md);
}
.tournament-basic-list li {
    margin-bottom: var(--space-sm);
    padding-left: 0;
}
.agenda-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}
.agenda-table th,
.agenda-table td {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    border-bottom: 1px solid #eee;
    vertical-align: top;
}
.agenda-table th {
    background: var(--color-secondary);
    color: #fff;
    font-weight: 600;
}
.agenda-table tbody tr:hover { background: rgba(0,0,0,0.02); }
.tournament-awards-list {
    columns: 1;
    margin: var(--space-md) 0 0;
}
@media (min-width: 600px) {
    .tournament-awards-list { columns: 2; gap: var(--space-xl); }
}
.tournament-awards-list li {
    break-inside: avoid;
    margin-bottom: var(--space-xs);
}

/* Seating / preparation room table */
.seating-lead-en {
    font-size: 0.95rem;
    font-weight: 400;
    opacity: 0.95;
    margin: var(--space-sm) 0 0;
    line-height: 1.45;
}
.seating-note {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin: 0 0 var(--space-md);
}
.seating-table-wrap { margin-top: var(--space-sm); }
.seating-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}
.seating-table th,
.seating-table td {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    border-bottom: 1px solid #eee;
    vertical-align: top;
}
.seating-table th {
    background: var(--color-secondary);
    color: #fff;
    font-weight: 600;
}
.seating-table thead .th-zh { display: block; }
.seating-table thead .th-en {
    display: block;
    font-size: 0.68rem;
    font-weight: 400;
    opacity: 0.9;
    margin-top: 0.2rem;
    line-height: 1.3;
}
.seating-table tbody tr:hover { background: rgba(0,0,0,0.02); }
.seating-table td { word-break: break-word; }
.register-closed-msg { margin-top: var(--space-md); }
.register-closed-msg p:last-child { margin-bottom: 0; }
@media (max-width: 767px) {
    .seating-table { font-size: 0.75rem; }
    .seating-table th,
    .seating-table td { padding: var(--space-xs) var(--space-sm); }
}