:root {
    --primary: #1e3a8a;
    --primary-hover: #1e40af;
    --secondary: #475569;
    --success: #15803d;
    --danger: #b91c1c;
    --warning: #d97706;
    --bg-main: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --judo-blue: #1d4ed8;
    --judo-white: #f1f5f9;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
}

/* Navbar */
.navbar {
    background: #0f172a;
    color: #fff;
    padding: 0.85rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.navbar a { color: #fff; text-decoration: none; }
.navbar-brand { font-size: 1.35rem; font-weight: 700; display: flex; align-items: center; gap: 0.6rem; }
.navbar-brand span { color: #38bdf8; }
.navbar-nav { display: flex; gap: 1.25rem; align-items: center; list-style: none; }
.navbar-nav a { font-size: 0.95rem; font-weight: 500; color: #cbd5e1; transition: color 0.2s; }
.navbar-nav a:hover, .navbar-nav a.active { color: #fff; }

.lang-switch { display: flex; gap: 0.4rem; background: #1e293b; padding: 0.25rem 0.5rem; border-radius: 6px; font-size: 0.85rem; }
.lang-switch a { color: #94a3b8; font-weight: bold; }
.lang-switch a.active { color: #38bdf8; }

/* Layout */
.container { max-width: 1320px; margin: 1.75rem auto; padding: 0 1rem; }
.card {
    background: var(--card-bg);
    border-radius: 10px;
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-bottom: 1.5rem;
    overflow: hidden;
}
.card-header {
    padding: 1rem 1.25rem;
    background: #f8fafc;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
}
.card-body { padding: 1.25rem; }

/* Grid */
.grid { display: grid; gap: 1.25rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

/* Stat card */
.stat-card {
    background: #fff;
    padding: 1.25rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
}
.stat-val { font-size: 2rem; font-weight: 800; color: var(--primary); }
.stat-lbl { color: var(--text-muted); font-size: 0.9rem; text-transform: uppercase; font-weight: 600; }

/* Table */
.table-responsive { width: 100%; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.92rem; }
th { background: #f1f5f9; padding: 0.75rem 1rem; font-weight: 600; color: #475569; border-bottom: 1px solid var(--border); }
td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:hover { background: #f8fafc; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #166534; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #991b1b; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-secondary { background: var(--secondary); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-main); }
.btn-outline:hover { background: #f1f5f9; }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1.1rem; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.88rem; font-weight: 600; margin-bottom: 0.35rem; color: #334155; }
.form-control {
    width: 100%;
    padding: 0.55rem 0.75rem;
    font-size: 0.92rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
    outline: none;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.15); }

/* Badges */
.badge { display: inline-block; padding: 0.25rem 0.5rem; font-size: 0.78rem; font-weight: 700; border-radius: 4px; text-transform: uppercase; }
.badge-primary { background: #dbeafe; color: #1e40af; }
.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-secondary { background: #f1f5f9; color: #475569; }

/* Alerts */
.alert { padding: 0.85rem 1.25rem; border-radius: 8px; margin-bottom: 1.25rem; font-size: 0.92rem; }
.alert-success { background: #dcfce7; color: #14532d; border: 1px solid #bbf7d0; }
.alert-danger { background: #fee2e2; color: #7f1d1d; border: 1px solid #fecaca; }

/* Judo specific styles */
.tatami-card { border-top: 4px solid #f59e0b; }
.tatami-card.active { border-top-color: #10b981; }
.fighter-box { padding: 0.75rem; border-radius: 6px; margin-bottom: 0.5rem; font-weight: 600; display: flex; justify-content: space-between; align-items: center; }
.fighter-white { background: #ffffff; border: 2px solid #cbd5e1; color: #0f172a; }
.fighter-blue { background: #1d4ed8; color: #ffffff; }

/* Bracket */
.bracket-wrapper { display: flex; gap: 2rem; overflow-x: auto; padding: 1.5rem 0; }
.bracket-round { min-width: 250px; display: flex; flex-direction: column; justify-content: space-around; }
.bracket-round-title { font-weight: 700; font-size: 0.95rem; margin-bottom: 1rem; text-align: center; color: var(--secondary); text-transform: uppercase; }
.bracket-match { background: #fff; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 1.5rem; box-shadow: 0 2px 4px rgba(0,0,0,0.04); overflow: hidden; }
.bracket-match-header { background: #f8fafc; padding: 0.4rem 0.75rem; font-size: 0.75rem; font-weight: bold; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; }
.bracket-match-participant { padding: 0.6rem 0.75rem; border-bottom: 1px solid #f1f5f9; font-size: 0.88rem; display: flex; justify-content: space-between; align-items: center; }
.bracket-match-participant.winner { font-weight: 700; background: #f0fdf4; }
.bracket-match-participant:last-child { border-bottom: none; }

@media (max-width: 768px) {
    .navbar { flex-direction: column; gap: 0.75rem; }
    .navbar-nav { flex-wrap: wrap; justify-content: center; }
}