/* SportNexus CE-0001 - Dark Glassmorphism */
:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: rgba(30, 41, 59, 0.6);
    --border: rgba(99, 102, 241, 0.2);
    --border-hover: rgba(99, 102, 241, 0.5);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --green: #22c55e;
    --red: #ef4444;
    --yellow: #eab308;
    --blue: #3b82f6;
    --gradient: linear-gradient(135deg, #6366f1 0%, #22c55e 100%);
    --glass: rgba(30, 41, 59, 0.4);
    --glass-border: rgba(99, 102, 241, 0.15);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --radius: 16px;
    --radius-sm: 10px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated background */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(34, 197, 94, 0.06) 0%, transparent 50%);
    animation: bgFloat 20s ease-in-out infinite;
    z-index: -1;
}

@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-2%, -2%); }
}

/* ---- Login ---- */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background: var(--glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow);
}

.login-card h1 {
    font-size: 2.1875rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
    margin-bottom: 8px;
}

.login-card .subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 0.9rem;
}

/* ---- Forms ---- */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color 0.2s;
    outline: none;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--accent);
}

.form-group textarea { resize: vertical; min-height: 80px; }

/* ---- Buttons ---- */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    width: 100%;
    justify-content: center;
}

.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: 8px;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.btn-outline:hover { border-color: var(--accent); }

.btn-green { background: var(--green); color: white; }
.btn-red { background: var(--red); color: white; }
.btn-blue { background: var(--blue); color: white; }
.btn-accent { background: var(--accent); color: white; }

.btn-icon {
    padding: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-icon:hover { border-color: var(--accent); color: var(--accent); }

/* ---- Layout ---- */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--glass);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--glass-border);
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform 0.3s;
}

.sidebar-brand {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    padding: 0 8px 24px;
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 16px;
}

.sidebar-brand small {
    display: block;
    font-size: 0.7rem;
    -webkit-text-fill-color: var(--text-muted);
    font-weight: 400;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.nav-item:hover { background: var(--bg-secondary); color: var(--text-primary); }
.nav-item.active { background: rgba(99, 102, 241, 0.15); color: var(--accent-light); font-weight: 600; }
.nav-item .nav-icon { font-size: 1.1rem; width: 24px; text-align: center; }

.sidebar-footer {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--glass-border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.user-name { font-size: 0.85rem; font-weight: 600; }
.user-role { font-size: 0.7rem; color: var(--text-muted); }

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 32px;
    min-height: 100vh;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.page-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

/* ---- Cards ---- */
.glass-card {
    background: var(--glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

/* ---- Stats ---- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ---- Tables ---- */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 12px 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--glass-border);
}

td {
    padding: 12px 16px;
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(99, 102, 241, 0.08);
}

tr:hover td { background: rgba(99, 102, 241, 0.05); }

/* ---- Tags / Badges ---- */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-green { background: rgba(34, 197, 94, 0.15); color: var(--green); }
.badge-red { background: rgba(239, 68, 68, 0.15); color: var(--red); }
.badge-yellow { background: rgba(234, 179, 8, 0.15); color: var(--yellow); }
.badge-blue { background: rgba(59, 130, 246, 0.15); color: var(--blue); }
.badge-purple { background: rgba(99, 102, 241, 0.15); color: var(--accent); }

/* ---- Hierarchy Tree ---- */
.tree-level {
    margin-left: 24px;
    border-left: 2px solid var(--glass-border);
    padding-left: 16px;
}

.tree-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 4px;
    transition: all 0.2s;
    cursor: pointer;
}

.tree-item:hover { background: var(--bg-secondary); }

.tree-item-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.tree-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.2s;
}

.tree-toggle.open { transform: rotate(90deg); }

.tree-actions {
    display: flex;
    gap: 6px;
    opacity: 0;
    transition: opacity 0.2s;
}

.tree-item:hover .tree-actions { opacity: 1; }

/* ---- RSVP Chart ---- */
.rsvp-chart {
    display: flex;
    height: 12px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--bg-secondary);
    margin: 8px 0;
}

.rsvp-bar-green { background: var(--green); }
.rsvp-bar-red { background: var(--red); }
.rsvp-bar-yellow { background: var(--yellow); }

.rsvp-legend {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.rsvp-legend span::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 6px;
    vertical-align: middle;
}

.legend-confirmed::before { background: var(--green); }
.legend-declined::before { background: var(--red); }
.legend-pending::before { background: var(--yellow); }

/* ---- Toggle / Checkbox ---- */
.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    cursor: pointer;
}

.toggle-switch input { display: none; }

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--text-muted);
    top: 2px;
    left: 2px;
    transition: all 0.2s;
}

.toggle-switch input:checked + .toggle-slider { background: var(--green); border-color: var(--green); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(20px); background: white; }

/* ---- Modal ---- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 32px;
    width: 100%;
    max-width: 500px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.modal h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.modal-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    justify-content: flex-end;
}

/* ---- Toast ---- */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 14px 20px;
    font-size: 0.9rem;
    box-shadow: var(--shadow);
    animation: toastIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast-success { border-left: 3px solid var(--green); }
.toast-error { border-left: 3px solid var(--red); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ---- Tabs (Event type filter) ---- */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.tab {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.tab.active, .tab:hover {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-light);
    border-color: var(--accent);
}

/* ---- Empty State ---- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state .icon { font-size: 3rem; margin-bottom: 16px; }
.empty-state p { font-size: 0.9rem; }

/* ---- Page visibility ---- */
.page { display: none; }
.page.active { display: block; }

/* ---- Hamburger (mobile) ---- */
.hamburger {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 200;
    padding: 10px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1.3rem;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .hamburger { display: block; }
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; padding: 16px; padding-top: 60px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .page-header { flex-direction: column; gap: 12px; align-items: flex-start; }
    .modal { margin: 10px; padding: 20px; }
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ---- Loading ---- */
.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 40px auto;
}

@keyframes spin { to { transform: rotate(360deg); } }