/* ===== CSS Variables & Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #232340;
    --bg-card-hover: #2a2a4a;
    --text-primary: #e8e8f0;
    --text-secondary: #a0a0b8;
    --text-muted: #6a6a82;
    --accent-gold: #f0c040;
    --accent-amber: #ffa726;
    --accent-shukla: #f5d742;
    --accent-krishna: #5b7fff;
    --border-color: #2e2e4a;
    --success: #4caf50;
    --error: #ef5350;
    --font-mono: 'Consolas', 'Courier New', 'Source Code Pro', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', system-ui, sans-serif;
    --radius: 8px;
}

html { font-size: 16px; }
body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== Header ===== */
header {
    text-align: center;
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}
header h1 {
    font-size: 1.3rem;
    color: var(--accent-gold);
    font-weight: 700;
    letter-spacing: 0.02em;
}
header .subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

/* ===== Main Layout ===== */
.layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 1.25rem;
    padding: 1.25rem;
    max-width: 1600px;
    margin: 0 auto;
}
@media (max-width: 900px) {
    .layout { grid-template-columns: 1fr; }
}

/* ===== Panel ===== */
.panel {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.25rem;
    border: 1px solid var(--border-color);
}
.panel h2 {
    font-size: 1.05rem;
    margin-bottom: 1rem;
    color: var(--accent-amber);
    font-weight: 600;
}

/* ===== Form ===== */
.form-row {
    display: flex;
    gap: 0.6rem;
    margin-bottom: 0.6rem;
}
.form-row label {
    flex: 1;
    display: flex;
    flex-direction: column;
    font-size: 0.75rem;
    color: var(--text-secondary);
    gap: 0.2rem;
}
.form-row input,
.form-row select {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.45rem 0.55rem;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: var(--font-mono);
    transition: border-color 0.15s;
}
.form-row input:focus,
.form-row select:focus {
    outline: none;
    border-color: var(--accent-gold);
}

input[type="date"], input[type="time"] {
    color-scheme: dark;
}

#map-container {
    height: 200px;
    margin: 0.6rem 0;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
}
#map { height: 100%; width: 100%; }

#calc-btn {
    width: 100%;
    padding: 0.7rem;
    background: var(--accent-gold);
    color: #1a1a2e;
    border: none;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.2s;
    margin-top: 0.5rem;
}
#calc-btn:hover { opacity: 0.85; }
#calc-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Locate button */
.locate-btn {
    flex: 1;
    padding: 0.45rem 0.6rem;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--font-sans);
}
.locate-btn:hover {
    border-color: var(--accent-amber);
    background: var(--bg-card-hover);
}
.locate-btn.locating {
    animation: pulse 1s infinite;
    color: var(--accent-amber);
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* Export buttons */
.export-btn {
    padding: 0.4rem 0.8rem;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.78rem;
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--font-sans);
}
.export-btn:hover {
    border-color: var(--accent-gold);
    background: var(--bg-card-hover);
    color: var(--accent-gold);
}

/* ===== Tabs ===== */
#tabs {
    display: flex;
    gap: 0.2rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0;
    flex-wrap: wrap;
    overflow-x: auto;
}
.tab {
    background: transparent;
    border: none;
    padding: 0.45rem 0.75rem;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.8rem;
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
    white-space: nowrap;
    font-family: var(--font-sans);
}
.tab:hover { color: var(--text-primary); }
.tab.active {
    color: var(--accent-gold);
    border-bottom-color: var(--accent-gold);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== Panchanga Cards ===== */
#panchanga-cards {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.panchanga-card {
    flex: 1;
    min-width: 150px;
    max-width: 220px;
    background: var(--bg-card);
    border-radius: 10px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform 0.15s, box-shadow 0.15s;
}
.panchanga-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.panchanga-card .card-icon { font-size: 1.8rem; margin-bottom: 0.35rem; line-height: 1; }
.panchanga-card .card-title {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.15rem;
}
.panchanga-card .card-name {
    font-size: 0.95rem;
    font-weight: 700;
    margin: 0.15rem 0;
    color: var(--text-primary);
}
.panchanga-card .card-chinese {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 0.1rem;
}
.panchanga-card .card-detail {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}
.panchanga-card .progress-bar {
    height: 4px;
    background: var(--bg-primary);
    border-radius: 2px;
    margin-top: 0.45rem;
    overflow: hidden;
}
.panchanga-card .progress-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.5s ease;
}
.progress-shukla { background: var(--accent-shukla); }
.progress-krishna { background: var(--accent-krishna); }

/* ===== Data Tables ===== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    font-size: 0.82rem;
}
.data-table th {
    background: var(--bg-card);
    padding: 0.45rem 0.6rem;
    text-align: left;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 0.75rem;
    position: sticky;
    top: 0;
}
.data-table td {
    padding: 0.35rem 0.6rem;
    border-bottom: 1px solid var(--border-color);
}
.data-table tr:hover td { background: var(--bg-card-hover); }
.data-table .retro { color: var(--error); }
.data-table .number-cell { text-align: right; font-variant-numeric: tabular-nums; }

/* ===== Info grid ===== */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
}
.info-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
}
.info-card .info-label { font-size: 0.7rem; color: var(--text-muted); }
.info-card .info-value { font-size: 0.9rem; font-weight: 600; margin-top: 0.15rem; }
.info-card .info-sub { font-size: 0.72rem; color: var(--text-secondary); margin-top: 0.1rem; }

/* ===== Loading ===== */
#loading-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15,15,26,0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 1rem;
}
#loading-overlay.visible { display: flex; }
.spinner {
    width: 40px; height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-gold);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Empty state ===== */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 3rem; margin-bottom: 0.5rem; }
.empty-state .empty-text { font-size: 0.9rem; }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }