:root {
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --secondary: #64748b;
    --accent: #10b981;
    --danger: #ef4444;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
    --font-sans: 'Inter', sans-serif;
    --font-display: 'Outfit', sans-serif;
    --radius: 12px;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    padding-bottom: 60px;
}

/* Typography */
h1, h2, h3 { font-family: var(--font-display); }
h1 { font-size: 2rem; font-weight: 900; background: linear-gradient(to right, #3b82f6, #10b981); -webkit-background-clip: text; color: transparent; }
h2 { font-size: 1.5rem; margin-bottom: 1rem; }
h3 { font-size: 1.2rem; margin-bottom: 0.5rem; color: var(--text-muted); }

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* Header */
.app-header {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border);
    padding: 1rem;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

select {
    background: var(--bg-card);
    color: var(--text-main);
    border: 1px solid var(--border);
    padding: 0.5rem;
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-weight: 600;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.third-status-banner {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: var(--radius);
    text-align: center;
    font-weight: 800;
    font-family: var(--font-display);
    font-size: 1.2rem;
}
.third-status-banner.error {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

/* Groups Grid */
.groups-section { margin-bottom: 2rem; overflow: hidden; }
.groups-grid {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 1rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
}
.groups-grid::-webkit-scrollbar { display: none; /* Safari/Chrome */ }

@media (min-width: 768px) {
    .groups-grid { 
        display: grid; 
        grid-template-columns: repeat(2, 1fr); 
        overflow: visible; 
        padding-bottom: 0;
    }
}
@media (min-width: 1024px) {
    .groups-grid { grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
}

.group-card {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    overflow: hidden;
    flex: 0 0 85%;
    scroll-snap-align: center;
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

@media (min-width: 768px) {
    .group-card { flex: auto; scroll-snap-align: none; }
}

.group-header {
    background: linear-gradient(180deg, rgba(255,255,255,0.06), transparent);
    padding: 0.8rem 1rem;
    font-weight: 800;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    color: #fff;
    letter-spacing: 0.05em;
    font-size: 1.1rem;
}

.team-row {
    display: flex;
    align-items: center;
    padding: 0.65rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
}
.team-row:last-child { border-bottom: none; }

.team-info {
    display: flex;
    align-items: center;
    flex: 1;
    gap: 0.75rem;
}
.flag {
    width: 22px; height: 16px; border-radius: 2px;
    object-fit: cover;
    box-shadow: 0 0 0 1px rgba(255,255,255,0.1);
}

.team-actions {
    display: flex;
    gap: 0.25rem;
}
.pos-btn {
    background: rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--text-muted);
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.85rem;
}
.pos-btn:hover { background: rgba(255,255,255,0.1); }
.pos-btn.active-1 { background: #eab308; color: #000; border-color: #eab308; }
.pos-btn.active-2 { background: #94a3b8; color: #000; border-color: #94a3b8; }
.pos-btn.active-3 { background: #cd7f32; color: #fff; border-color: #cd7f32; }

/* Bracket Section - Mobile Stack */
.bracket-section { 
    margin-bottom: 2rem; 
    display: flex; 
    flex-direction: column; 
    gap: 0.75rem; 
}
.bracket-round, .match-list, .bracket-finals-wrap { 
    display: contents; 
}
.bracket-section h3.mobile-only {
    margin-top: 1.5rem;
    margin-bottom: 0.25rem;
    text-align: center;
    color: var(--primary);
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    width: 100%;
}

.match-box {
    background: rgba(30, 41, 59, 0.75);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    font-size: 0.85rem;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.match-team {
    display: flex;
    align-items: center;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    transition: all 0.2s;
}
.match-team:last-child { border-bottom: none; }
.match-team:hover { background: rgba(255,255,255,0.1); }
.match-team.empty { cursor: not-allowed; opacity: 0.4; }
.match-team.winner { background: rgba(16, 185, 129, 0.15); border-left: 3px solid var(--accent); }

.match-team .flag { margin-right: 0.75rem; }
.match-team .name { font-weight: 600; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.match-team .meta { font-size: 0.75rem; color: var(--text-muted); margin-left: 0.5rem; }

/* Desktop Symmetrical Bracket Grid */
@media (min-width: 1024px) {
    .mobile-only { display: none !important; }
    
    .bracket-section {
        display: grid;
        grid-template-columns: repeat(9, 1fr);
        grid-template-rows: repeat(30, minmax(20px, auto));
        gap: 0.35rem 0.5rem;
        align-items: center;
        max-width: 100%;
    }
    
    .match-box {
        max-width: 100%;
        margin: 0;
        border-radius: 6px;
    }
    
    .match-team { padding: 0.35rem 0.5rem; }
    .match-team .name { font-size: 0.75rem; }
    .match-team .flag { width: 16px; height: 11px; margin-right: 0.4rem; }

    /* R32 Left (Col 1) */
    #bracket-r32 .match-box:nth-child(2) { grid-column: 1; grid-row: 1 / span 2; }
    #bracket-r32 .match-box:nth-child(5) { grid-column: 1; grid-row: 5 / span 2; }
    #bracket-r32 .match-box:nth-child(1) { grid-column: 1; grid-row: 9 / span 2; }
    #bracket-r32 .match-box:nth-child(3) { grid-column: 1; grid-row: 13 / span 2; }
    #bracket-r32 .match-box:nth-child(11){ grid-column: 1; grid-row: 17 / span 2; }
    #bracket-r32 .match-box:nth-child(12){ grid-column: 1; grid-row: 21 / span 2; }
    #bracket-r32 .match-box:nth-child(9) { grid-column: 1; grid-row: 25 / span 2; }
    #bracket-r32 .match-box:nth-child(10){ grid-column: 1; grid-row: 29 / span 2; }

    /* R32 Right (Col 9) */
    #bracket-r32 .match-box:nth-child(4) { grid-column: 9; grid-row: 1 / span 2; }
    #bracket-r32 .match-box:nth-child(6) { grid-column: 9; grid-row: 5 / span 2; }
    #bracket-r32 .match-box:nth-child(7) { grid-column: 9; grid-row: 9 / span 2; }
    #bracket-r32 .match-box:nth-child(8) { grid-column: 9; grid-row: 13 / span 2; }
    #bracket-r32 .match-box:nth-child(14){ grid-column: 9; grid-row: 17 / span 2; }
    #bracket-r32 .match-box:nth-child(16){ grid-column: 9; grid-row: 21 / span 2; }
    #bracket-r32 .match-box:nth-child(13){ grid-column: 9; grid-row: 25 / span 2; }
    #bracket-r32 .match-box:nth-child(15){ grid-column: 9; grid-row: 29 / span 2; }

    /* R16 Left (Col 2) */
    #bracket-r16 .match-box:nth-child(1) { grid-column: 2; grid-row: 3 / span 2; }
    #bracket-r16 .match-box:nth-child(2) { grid-column: 2; grid-row: 11 / span 2; }
    #bracket-r16 .match-box:nth-child(5) { grid-column: 2; grid-row: 19 / span 2; }
    #bracket-r16 .match-box:nth-child(6) { grid-column: 2; grid-row: 27 / span 2; }

    /* R16 Right (Col 8) */
    #bracket-r16 .match-box:nth-child(3) { grid-column: 8; grid-row: 3 / span 2; }
    #bracket-r16 .match-box:nth-child(4) { grid-column: 8; grid-row: 11 / span 2; }
    #bracket-r16 .match-box:nth-child(7) { grid-column: 8; grid-row: 19 / span 2; }
    #bracket-r16 .match-box:nth-child(8) { grid-column: 8; grid-row: 27 / span 2; }

    /* QF Left (Col 3) */
    #bracket-qf .match-box:nth-child(1) { grid-column: 3; grid-row: 7 / span 2; }
    #bracket-qf .match-box:nth-child(2) { grid-column: 3; grid-row: 23 / span 2; }

    /* QF Right (Col 7) */
    #bracket-qf .match-box:nth-child(3) { grid-column: 7; grid-row: 7 / span 2; }
    #bracket-qf .match-box:nth-child(4) { grid-column: 7; grid-row: 23 / span 2; }

    /* SF Left (Col 4) */
    #bracket-sf .match-box:nth-child(1) { grid-column: 4; grid-row: 15 / span 2; }

    /* SF Right (Col 6) */
    #bracket-sf .match-box:nth-child(2) { grid-column: 6; grid-row: 15 / span 2; }

    /* Center Final (Col 5) */
    #bracket-final .match-box:nth-child(1) { grid-column: 5; grid-row: 12 / span 2; transform: scale(1.1); box-shadow: 0 0 15px rgba(255,122,0,0.3); }
    #bracket-3p .match-box:nth-child(1) { grid-column: 5; grid-row: 17 / span 2; transform: scale(0.9); opacity: 0.8; }
    
    /* Connectors minimal style */
    .match-box::after, .match-box::before { 
        content: ''; 
        position: absolute; 
        top: 50%; 
        width: 0.5rem; 
        height: 3px; 
        background: rgba(255, 255, 255, 0.95); 
        box-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
        z-index: 10;
    }
    
    /* Outward lines (Right for Left Half, Left for Right Half) */
    #bracket-r32 .match-box:nth-child(2)::after, #bracket-r32 .match-box:nth-child(5)::after, 
    #bracket-r32 .match-box:nth-child(1)::after, #bracket-r32 .match-box:nth-child(3)::after,
    #bracket-r32 .match-box:nth-child(11)::after, #bracket-r32 .match-box:nth-child(12)::after,
    #bracket-r32 .match-box:nth-child(9)::after, #bracket-r32 .match-box:nth-child(10)::after,
    #bracket-r16 .match-box:nth-child(1)::after, #bracket-r16 .match-box:nth-child(2)::after,
    #bracket-r16 .match-box:nth-child(5)::after, #bracket-r16 .match-box:nth-child(6)::after,
    #bracket-qf .match-box:nth-child(1)::after, #bracket-qf .match-box:nth-child(2)::after,
    #bracket-sf .match-box:nth-child(1)::after { right: -0.5rem; }

    #bracket-r32 .match-box:nth-child(4)::after, #bracket-r32 .match-box:nth-child(6)::after, 
    #bracket-r32 .match-box:nth-child(7)::after, #bracket-r32 .match-box:nth-child(8)::after,
    #bracket-r32 .match-box:nth-child(14)::after, #bracket-r32 .match-box:nth-child(16)::after,
    #bracket-r32 .match-box:nth-child(13)::after, #bracket-r32 .match-box:nth-child(15)::after,
    #bracket-r16 .match-box:nth-child(3)::after, #bracket-r16 .match-box:nth-child(4)::after,
    #bracket-r16 .match-box:nth-child(7)::after, #bracket-r16 .match-box:nth-child(8)::after,
    #bracket-qf .match-box:nth-child(3)::after, #bracket-qf .match-box:nth-child(4)::after,
    #bracket-sf .match-box:nth-child(2)::after { left: -0.5rem; }

    /* Inward lines (Left for Left Half, Right for Right Half) */
    #bracket-r16 .match-box:nth-child(1)::before, #bracket-r16 .match-box:nth-child(2)::before,
    #bracket-r16 .match-box:nth-child(5)::before, #bracket-r16 .match-box:nth-child(6)::before,
    #bracket-qf .match-box:nth-child(1)::before, #bracket-qf .match-box:nth-child(2)::before,
    #bracket-sf .match-box:nth-child(1)::before { left: -0.5rem; }
    
    #bracket-r16 .match-box:nth-child(3)::before, #bracket-r16 .match-box:nth-child(4)::before,
    #bracket-r16 .match-box:nth-child(7)::before, #bracket-r16 .match-box:nth-child(8)::before,
    #bracket-qf .match-box:nth-child(3)::before, #bracket-qf .match-box:nth-child(4)::before,
    #bracket-sf .match-box:nth-child(2)::before { right: -0.5rem; }

    #bracket-final .match-box::after, #bracket-final .match-box::before,
    #bracket-3p .match-box::after, #bracket-3p .match-box::before { display: none; }
}

/* Champion */
.champion-section { text-align: center; }
.empty-champ {
    font-size: 3rem; color: var(--text-muted); font-weight: 900;
    padding: 2rem;
}
.champ-display {
    display: flex; flex-direction: column; align-items: center; gap: 1rem;
    padding: 2rem;
}
.champ-display .flag { width: 80px; height: 60px; border-radius: 8px; }
.champ-display .name { font-size: 2.5rem; font-weight: 900; color: #fbbf24; }

/* Buttons & Actions */
.actions-section {
    display: flex; flex-direction: column; gap: 1rem; margin-top: 2rem;
}
@media (min-width: 768px) {
    .actions-section { flex-direction: row; flex-wrap: wrap; justify-content: center; }
}
.btn {
    padding: 1rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    text-align: center;
    transition: opacity 0.2s, transform 0.1s;
    font-family: var(--font-sans);
}
.btn:hover { opacity: 0.9; }
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--primary); color: white; }
.btn-secondary { background: var(--secondary); color: white; }
.btn-danger { background: var(--danger); color: white; }

.app-footer {
    margin-top: 4rem;
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border);
    display: flex; justify-content: center; gap: 1.5rem;
}
.app-footer a { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; }
.app-footer a:hover { color: white; }

/* BracketMaster2026 premium asset layer */
.brand-wrap { display:flex; align-items:center; gap:.75rem; }
.brand-icon { width:44px; height:44px; object-fit:contain; }
.hero-section { position:relative; overflow:hidden; padding:0; min-height:280px; display:grid; grid-template-columns:1fr; background:#050a1f; }
.hero-image { width:100%; height:100%; min-height:280px; object-fit:cover; display:block; opacity:.78; }
.hero-copy { position:absolute; inset:0; z-index:2; display:flex; flex-direction:column; justify-content:space-between; padding:1.25rem; background:linear-gradient(90deg, rgba(5,10,31,.92), rgba(5,10,31,.48), rgba(5,10,31,.12)); }
.hero-logo { max-width:min(560px, 92%); height:auto; object-fit:contain; filter:drop-shadow(0 12px 24px rgba(0,0,0,.55)); }
.countdown-box { align-self:flex-start; background:rgba(3,10,32,.72); border:1px solid rgba(255,255,255,.18); border-radius:18px; padding:1rem; backdrop-filter:blur(10px); box-shadow:0 20px 50px rgba(0,0,0,.35); }
.countdown-title { font-weight:800; margin-bottom:.6rem; color:#fff; letter-spacing:.02em; }
.countdown-grid { display:grid; grid-template-columns:repeat(4, minmax(56px, 1fr)); gap:.6rem; }
.countdown-grid div { text-align:center; border-radius:14px; padding:.6rem .4rem; background:linear-gradient(135deg, rgba(236,0,102,.32), rgba(0,160,255,.24)); border:1px solid rgba(255,255,255,.12); }
.countdown-grid strong { display:block; font-size:1.35rem; line-height:1; color:#fff; font-family:var(--font-display); }
.countdown-grid span { display:block; margin-top:.25rem; font-size:.72rem; color:var(--text-muted); text-transform:uppercase; }
:root { --primary:#00a3ff; --primary-hover:#0086d4; --accent:#ff7a00; --bg-dark:#050a1f; }
h1 { background:linear-gradient(to right, #fff, #00a3ff 48%, #ff7a00); -webkit-background-clip:text; color:transparent; }
.pos-btn.active-1, .pos-btn.active-2, .pos-btn.active-3, .match-team.winner { box-shadow:0 0 0 2px rgba(255,122,0,.35), 0 0 28px rgba(0,163,255,.22); }
@media (max-width: 1023px) {
    .hero-section {
        min-height: 380px;
    }
    .hero-image {
        min-height: 380px;
    }
    .hero-copy {
        align-items: center;
        justify-content: center;
        gap: 1.5rem;
        padding: 1.5rem;
        background: linear-gradient(180deg, rgba(5, 10, 31, 0.92) 0%, rgba(5, 10, 31, 0.6) 100%);
    }
    .hero-logo {
        max-width: min(340px, 85%);
        margin: 0 auto;
    }
    .countdown-box {
        align-self: center;
        width: 100%;
        max-width: 380px;
        padding: 0.75rem 1rem;
    }
    .countdown-grid {
        gap: 0.5rem;
    }
    .countdown-grid strong {
        font-size: 1.2rem;
    }
    .countdown-grid span {
        font-size: 0.65rem;
    }
}

@media (max-width: 640px) {
    .app-header { padding:.75rem; }
    .brand { font-size:1.25rem; }
    .brand-icon { width:34px; height:34px; }
    .hero-section { min-height:360px; }
    .hero-image { min-height:360px; }
    .hero-copy { 
        padding:1rem; 
        align-items: center;
        justify-content: center;
        gap: 1.25rem;
        background:linear-gradient(180deg, rgba(5,10,31,.92), rgba(5,10,31,.75)); 
    }
    .hero-logo {
        max-width: min(280px, 80%);
    }
    .countdown-box { 
        width:100%; 
        max-width: 320px;
        padding: 0.6rem 0.8rem;
    }
    .countdown-grid { gap:.35rem; }
    .countdown-grid strong { font-size:1.05rem; }
    .countdown-grid span { font-size:.62rem; }
}

/* Read Only Prediction Styles */
.rank-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 20px;
    font-size: 0.72rem;
    font-weight: 800;
    border-radius: 4px;
    margin-right: 0.5rem;
    text-transform: uppercase;
}
.pos-badge-1 { background: #eab308; color: #000; }
.pos-badge-2 { background: #94a3b8; color: #000; }
.pos-badge-3 { background: #cd7f32; color: #fff; }
.pos-badge-4 { background: rgba(255, 255, 255, 0.1); color: var(--text-muted); }

.qualify-star {
    font-size: 1.1rem;
    margin-left: auto;
    filter: drop-shadow(0 0 4px rgba(234, 179, 8, 0.5));
}

.team-status-indicator {
    display: flex;
    align-items: center;
    margin-left: auto;
}

.read-only-row {
    justify-content: space-between;
}
.read-only-row.third-qualified {
    background: rgba(16, 185, 129, 0.05);
}

.read-only-team {
    cursor: default !important;
}
.read-only-team:hover {
    background: transparent !important;
}

/* Open Graph Social Card Preview */
.og-card-container {
    margin: 2rem auto;
    max-width: 600px;
    width: 100%;
}
.og-card-title {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
    text-align: center;
}
.og-card-wrapper {
    aspect-ratio: 1200 / 630;
    width: 100%;
    background: radial-gradient(circle at top right, #1e293b, #050a1f);
    border: 2px solid rgba(0, 163, 255, 0.35);
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.5);
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}
.og-card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}
.og-card-branding {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.og-card-logo-icon {
    width: 45px;
    height: 45px;
    object-fit: contain;
}
.og-card-app-name {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 900;
    background: linear-gradient(to right, #fff, #00a3ff, #ff7a00);
    -webkit-background-clip: text;
    color: transparent;
}
.og-card-prediction-id {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
}
.og-card-middle {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    margin: 1.5rem 0;
}
.og-card-champ-label {
    font-family: var(--font-display);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: #ff7a00;
    font-weight: 700;
}
.og-card-champ-flag {
    width: 90px;
    height: 60px;
    border-radius: 6px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.4);
    object-fit: cover;
}
.og-card-champ-name {
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 900;
    color: #fbbf24;
    text-shadow: 0 0 20px rgba(251,191,36,0.3);
}
.og-card-bottom {
    display: flex;
    justify-content: center;
}
.og-card-cta-badge {
    background: linear-gradient(90deg, #00a3ff, #0055ff);
    color: #fff;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 800;
    padding: 0.6rem 2rem;
    border-radius: 30px;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 15px rgba(0,163,255,0.3);
}

.og-card-actions {
    display: flex;
    justify-content: center;
    margin-top: 1rem;
}