/* ==========================================================================
   Splitwise Dashboard v2 — Dark Glassmorphism + Awards + Heatmap
   ========================================================================== */

:root {
    --bg-primary: #06060b;
    --bg-secondary: #0d0d14;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.05);
    --border-card: rgba(255, 255, 255, 0.06);
    --border-card-hover: rgba(255, 255, 255, 0.12);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-indigo: #6366f1;
    --accent-violet: #8b5cf6;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --shadow-card: 0 4px 30px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.08);
    --font: 'Inter', system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}
body::before {
    content: '';
    position: fixed; inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, rgba(99,102,241,0.06), transparent),
        radial-gradient(ellipse 60% 50% at 80% 100%, rgba(139,92,246,0.04), transparent);
    pointer-events: none; z-index: 0;
}
.app { position: relative; z-index: 1; }

/* --- Loading / Error --- */
.loading, .error-state {
    display: flex; flex-direction: column; align-items: center;
    justify-content: center; height: 100vh; gap: 20px;
    color: var(--text-secondary); text-align: center; padding: 40px;
}
.loading-spinner {
    width: 48px; height: 48px;
    border: 3px solid var(--border-card);
    border-top-color: var(--accent-indigo);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.error-icon { font-size: 4rem; }
.error-state code {
    background: rgba(255,255,255,0.06); padding: 4px 10px;
    border-radius: var(--radius-sm); color: var(--accent-indigo);
}

/* --- Dashboard --- */
.dashboard {
    max-width: 1320px; margin: 0 auto;
    padding: 32px 24px 64px;
    display: flex; flex-direction: column; gap: 24px;
}

/* --- Header --- */
.header {
    display: flex; align-items: flex-end; justify-content: space-between;
    gap: 16px; padding-bottom: 8px;
    border-bottom: 1px solid var(--border-card);
    animation: fadeSlideUp 0.6s ease-out both;
}
.header h1 {
    font-size: 1.8rem; font-weight: 800; letter-spacing: -0.03em;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.header-subtitle { color: var(--text-secondary); font-size: 0.9rem; margin-top: 2px; }
.period-badge {
    background: var(--bg-card); border: 1px solid var(--border-card);
    padding: 6px 16px; border-radius: 100px; font-size: 0.8rem;
    color: var(--text-secondary); white-space: nowrap; backdrop-filter: blur(12px);
}
.header-right { display: flex; align-items: center; gap: 10px; }
.currency-toggle { display: flex; gap: 4px; }
.currency-btn {
    background: var(--bg-card); border: 1px solid var(--border-card);
    color: var(--text-muted); padding: 5px 14px; border-radius: 100px;
    font-size: 0.78rem; font-weight: 600; cursor: pointer;
    font-family: var(--font); transition: all 0.2s ease;
}
.currency-btn:hover { color: var(--text-secondary); border-color: var(--border-card-hover); }
.currency-btn.active {
    background: var(--accent-indigo); border-color: var(--accent-indigo);
    color: #fff;
}

/* --- KPI Cards --- */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.kpi-card {
    background: var(--bg-card); border: 1px solid var(--border-card);
    border-radius: var(--radius-md); padding: 24px;
    backdrop-filter: blur(20px); box-shadow: var(--shadow-card);
    transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    animation: fadeSlideUp 0.6s ease-out both;
    animation-delay: calc(var(--delay,0) * 0.08s);
}
.kpi-card:hover {
    background: var(--bg-card-hover); border-color: var(--border-card-hover);
    transform: translateY(-2px); box-shadow: var(--shadow-card), var(--shadow-glow);
}
.kpi-icon { font-size: 1.6rem; margin-bottom: 12px; }
.kpi-value {
    font-size: 1.6rem; font-weight: 700; letter-spacing: -0.02em;
    color: var(--text-primary); margin-bottom: 4px;
}
.kpi-label {
    font-size: 0.78rem; color: var(--text-secondary);
    font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em;
}

/* --- Cards --- */
.card {
    background: var(--bg-card); border: 1px solid var(--border-card);
    border-radius: var(--radius-lg); padding: 28px;
    backdrop-filter: blur(20px); box-shadow: var(--shadow-card);
    animation: fadeSlideUp 0.6s ease-out both;
    animation-delay: calc(var(--delay,0) * 0.08s);
}
.card-full { width: 100%; }
.card-title {
    font-size: 1.1rem; font-weight: 600; margin-bottom: 20px;
    color: var(--text-primary); letter-spacing: -0.01em;
}
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.chart-container { position: relative; width: 100%; }
.chart-wide { height: 320px; }
.chart-square { height: 340px; }

/* --- Awards --- */
.awards-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
}
.award-card {
    display: flex; align-items: center; gap: 14px;
    padding: 16px 18px; border-radius: var(--radius-md);
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border-card);
    transition: all 0.25s ease;
    animation: fadeSlideUp 0.5s ease-out both;
    animation-delay: calc(var(--i,0) * 0.06s);
}
.award-card:hover {
    background: rgba(255,255,255,0.04);
    border-color: var(--border-card-hover);
    transform: translateY(-2px);
}
.award-emoji {
    font-size: 2rem; width: 52px; height: 52px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 14px; flex-shrink: 0;
}
.award-info { flex: 1; min-width: 0; }
.award-title {
    font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: 0.06em; margin-bottom: 2px;
}
.award-winner {
    font-size: 1.15rem; font-weight: 700; color: var(--text-primary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.award-detail {
    font-size: 0.78rem; color: var(--text-muted); margin-top: 1px;
}

/* --- Heatmap --- */
.heatmap-wrapper {
    overflow-x: auto; padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
}
.heatmap-months {
    display: flex; gap: 0; padding-left: 0;
    margin-bottom: 6px; font-size: 0.7rem;
    color: var(--text-muted); font-weight: 500;
}
.heatmap-months span {
    text-align: center;
}
.heatmap-grid {
    display: grid;
    grid-template-rows: repeat(7, 14px);
    grid-auto-flow: column;
    grid-auto-columns: 14px;
    gap: 3px;
}
.heatmap-cell {
    width: 14px; height: 14px;
    border-radius: 3px;
    transition: all 0.15s ease;
    cursor: default;
}
.heatmap-cell[data-amount] { cursor: pointer; }
.heatmap-cell:hover { transform: scale(1.4); z-index: 1; }
.heatmap-cell[style*="--intensity:0"] { background: rgba(255,255,255,0.04); }
.heatmap-cell[style*="--intensity:1"] { background: rgba(99,102,241,0.25); }
.heatmap-cell[style*="--intensity:2"] { background: rgba(99,102,241,0.45); }
.heatmap-cell[style*="--intensity:3"] { background: rgba(99,102,241,0.65); }
.heatmap-cell[style*="--intensity:4"] { background: rgba(99,102,241,0.9); }
.heatmap-legend {
    display: flex; align-items: center; gap: 6px;
    margin-top: 12px; font-size: 0.7rem; color: var(--text-muted);
}
.heatmap-legend-cells { display: flex; gap: 3px; }
.heatmap-tooltip {
    position: fixed; padding: 8px 12px;
    background: rgba(13,13,20,0.96); border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px; font-size: 0.78rem; color: var(--text-primary);
    pointer-events: none; z-index: 100; display: none;
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
}

/* --- Table --- */
.table-wrapper { overflow-x: auto; }
.expenses-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.expenses-table th {
    text-align: left; padding: 10px 14px; font-weight: 600;
    font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em;
    color: var(--text-muted); border-bottom: 1px solid var(--border-card);
}
.expenses-table td {
    padding: 12px 14px; border-bottom: 1px solid rgba(255,255,255,0.03);
    color: var(--text-secondary);
}
.expenses-table tbody tr {
    transition: background 0.15s; animation: fadeIn 0.3s ease-out both;
    animation-delay: calc(var(--row,0) * 0.03s);
}
.expenses-table tbody tr:hover { background: rgba(255,255,255,0.03); }
.expenses-table td:nth-child(3),
.expenses-table td:nth-child(4) {
    font-weight: 600; font-variant-numeric: tabular-nums; color: var(--text-primary);
}
.td-description {
    max-width: 260px; white-space: nowrap; overflow: hidden;
    text-overflow: ellipsis; color: var(--text-primary) !important; font-weight: 500 !important;
}
.td-rank { color: var(--text-muted) !important; font-weight: 600 !important; font-size: 0.78rem; }
.td-category {
    display: inline-block; background: rgba(99,102,241,0.1);
    color: var(--accent-indigo); padding: 2px 8px; border-radius: 100px;
    font-size: 0.72rem; font-weight: 500; white-space: nowrap;
}

/* --- Banker Section --- */
.banker-section { border-color: rgba(99,102,241,0.15); }
.banker-subtitle {
    color: var(--text-secondary); font-size: 0.9rem;
    margin: -12px 0 20px; line-height: 1.5;
}
.banker-kpis {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 14px; margin-bottom: 24px;
}
.banker-kpi {
    padding: 20px; border-radius: var(--radius-md);
    border: 1px solid var(--border-card);
    background: rgba(255,255,255,0.02); text-align: center;
}
.banker-kpi-icon { font-size: 1.8rem; margin-bottom: 8px; }
.banker-kpi-value {
    font-size: 1.5rem; font-weight: 700;
    color: var(--text-primary); letter-spacing: -0.02em;
}
.banker-kpi-label {
    font-size: 0.72rem; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: 0.04em;
    margin-top: 4px;
}
.banker-kpi-sublabel { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }
.banker-kpi.highlight-red { border-color: rgba(244,63,94,0.3); background: rgba(244,63,94,0.05); }
.banker-kpi.highlight-red .banker-kpi-value { color: #f43f5e; }
.banker-kpi.highlight-amber { border-color: rgba(245,158,11,0.3); background: rgba(245,158,11,0.05); }
.banker-kpi.highlight-amber .banker-kpi-value { color: #f59e0b; }
.banker-kpi.highlight-green { border-color: rgba(16,185,129,0.3); background: rgba(16,185,129,0.05); }
.banker-kpi.highlight-green .banker-kpi-value { color: #10b981; }
.banker-disclaimer {
    margin-top: 16px; font-size: 0.75rem; color: var(--text-muted);
    font-style: italic; text-align: center;
}
.debtor-section { border-color: rgba(244,63,94,0.15); }

/* --- Footer --- */
.footer {
    text-align: center; padding: 24px 0 0;
    color: var(--text-muted); font-size: 0.8rem;
    border-top: 1px solid var(--border-card);
}

/* --- Animations --- */
@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* --- Responsive --- */
@media (max-width: 900px) {
    .kpi-grid { grid-template-columns: repeat(2, 1fr); }
    .two-col { grid-template-columns: 1fr; }
    .header { flex-direction: column; align-items: flex-start; }
    .awards-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}
@media (max-width: 520px) {
    .dashboard { padding: 16px 12px 48px; gap: 16px; }
    .kpi-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .kpi-card { padding: 16px; }
    .kpi-value { font-size: 1.3rem; }
    .card { padding: 18px; border-radius: var(--radius-md); }
    .chart-wide { height: 240px; }
    .chart-square { height: 280px; }
    .header h1 { font-size: 1.4rem; }
    .awards-grid { grid-template-columns: 1fr; }
}