/* ========================================================================
   EA7JYN APRS — Premium theme
   Dark + Light modes, glassmorphism, smooth animations
   ======================================================================== */

/* --- Dark theme (default) --- */
:root,
[data-theme="dark"] {
    --bg-base: #06060c;
    --bg-surface: rgba(20, 22, 35, 0.6);
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --bg-elevated: rgba(255, 255, 255, 0.08);
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.16);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #22d3ee;
    --accent-2: #a78bfa;
    --success: #4ade80;
    --warn: #facc15;
    --danger: #f87171;
    --glow: rgba(34, 211, 238, 0.15);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --grid-color: rgba(255, 255, 255, 0.03);
    --leaflet-popup-bg: #1a1a2e;
}

/* --- Light theme --- */
[data-theme="light"] {
    --bg-base: #f1f5f9;
    --bg-surface: rgba(255, 255, 255, 0.7);
    --bg-card: rgba(255, 255, 255, 0.65);
    --bg-card-hover: rgba(255, 255, 255, 0.85);
    --bg-elevated: rgba(255, 255, 255, 0.95);
    --border: rgba(15, 23, 42, 0.08);
    --border-strong: rgba(15, 23, 42, 0.16);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent: #0891b2;
    --accent-2: #7c3aed;
    --success: #16a34a;
    --warn: #ca8a04;
    --danger: #dc2626;
    --glow: rgba(8, 145, 178, 0.1);
    --shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
    --grid-color: rgba(15, 23, 42, 0.04);
    --leaflet-popup-bg: #ffffff;
}

/* --- Base --- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Subtle grid background */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: 0;
}

[data-theme="dark"] body::before {
    mask-image: radial-gradient(ellipse at top, black 0%, transparent 60%);
}

.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; }

/* --- Layout --- */
.sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 240px;
    background: var(--bg-surface);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

.brand-mark {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    color: #0a0a0f;
    font-weight: 800;
    font-size: 20px;
    box-shadow: 0 4px 16px var(--glow);
}

.brand-title {
    font-weight: 700;
    font-size: 16px;
    letter-spacing: -0.01em;
}

.brand-sub {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 10px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.15s ease;
    position: relative;
}

.nav-item svg {
    width: 18px; height: 18px;
    flex-shrink: 0;
}

.nav-item:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(34, 211, 238, 0.12), rgba(167, 139, 250, 0.08));
    color: var(--accent);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0; top: 8px; bottom: 8px;
    width: 3px;
    background: linear-gradient(180deg, var(--accent), var(--accent-2));
    border-radius: 0 2px 2px 0;
}

[data-theme="light"] .nav-item.active {
    background: linear-gradient(90deg, rgba(8, 145, 178, 0.12), rgba(124, 58, 237, 0.06));
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

.theme-toggle {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.15s ease;
    font-size: 13px;
    font-weight: 500;
}

.theme-toggle:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-strong);
}

.theme-toggle svg {
    width: 16px; height: 16px;
}

[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

.main-content {
    margin-left: 240px;
    padding: 32px 40px;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* --- Cards --- */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
    border-color: var(--border-strong);
}

.card-glow {
    box-shadow: 0 0 60px var(--glow);
}

/* --- Page header --- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-title {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 4px;
}

/* --- Stat cards --- */
.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.5;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-strong);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.stat-unit {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 4px;
}

/* --- Tables --- */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 13px;
}

.data-table thead th {
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 11px;
    text-align: left;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
}

.data-table thead th.text-center { text-align: center; }

.data-table tbody tr {
    transition: background 0.15s ease;
}

.data-table tbody tr:hover {
    background: var(--bg-card-hover);
}

.data-table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.callsign {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    color: var(--accent);
}

.rssi-good { color: var(--success); }
.rssi-warn { color: var(--warn); }
.rssi-bad  { color: var(--danger); }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.15s ease;
    text-decoration: none;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #06060c;
    box-shadow: 0 4px 16px var(--glow);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px var(--glow);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-ghost {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-strong);
}

.btn svg { width: 16px; height: 16px; }

/* --- Select --- */
.select {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: 10px;
    padding: 8px 14px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: border-color 0.15s ease;
    min-width: 140px;
}

.select:hover, .select:focus {
    border-color: var(--accent);
    outline: none;
}

/* --- Section title --- */
.section-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* --- Map --- */
.map-container {
    height: 480px;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.leaflet-container {
    background: var(--bg-base);
    font-family: inherit;
}

[data-theme="dark"] .leaflet-popup-content-wrapper,
[data-theme="dark"] .leaflet-popup-tip {
    background: var(--leaflet-popup-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
}

[data-theme="light"] .leaflet-popup-content-wrapper,
[data-theme="light"] .leaflet-popup-tip {
    background: var(--leaflet-popup-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.popup-callsign {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    color: var(--accent);
    font-size: 14px;
}

.popup-info {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* --- Pulse indicator (LIVE) --- */
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.85); }
}

.pulse-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 12px var(--success);
    animation: pulse-dot 2s ease-in-out infinite;
    display: inline-block;
}

/* --- Live badge --- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-live {
    background: rgba(74, 222, 128, 0.12);
    color: var(--success);
    border: 1px solid rgba(74, 222, 128, 0.3);
}

.badge-info {
    background: rgba(34, 211, 238, 0.12);
    color: var(--accent);
    border: 1px solid rgba(34, 211, 238, 0.3);
}

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

.empty-state svg {
    width: 48px; height: 48px;
    margin: 0 auto 16px;
    opacity: 0.5;
}

/* --- Loading dots --- */
.loading-dots {
    display: inline-block;
    width: 16px; height: 16px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* --- Animations on entrance --- */
@keyframes fade-in-up {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fade-in-up 0.4s ease backwards;
}

.animate-in:nth-child(1) { animation-delay: 0ms; }
.animate-in:nth-child(2) { animation-delay: 50ms; }
.animate-in:nth-child(3) { animation-delay: 100ms; }
.animate-in:nth-child(4) { animation-delay: 150ms; }
.animate-in:nth-child(5) { animation-delay: 200ms; }
.animate-in:nth-child(6) { animation-delay: 250ms; }

/* --- Responsive --- */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
        padding: 20px 16px;
    }
}

/* --- Mobile menu button (hidden on desktop) --- */
.mobile-menu {
    display: none;
    position: fixed;
    top: 16px; left: 16px;
    z-index: 200;
    width: 40px; height: 40px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

@media (max-width: 768px) {
    .mobile-menu { display: flex; }
}

/* --- Form --- */
.form-input {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 14px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    width: 100%;
    transition: border-color 0.15s ease;
}

.form-input:focus {
    border-color: var(--accent);
    outline: none;
}

/* --- Custom marker dot (for maps) --- */
.marker-dot {
    width: 14px; height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg-base);
    box-shadow: 0 0 12px var(--accent);
    transition: transform 0.15s ease;
}

.marker-dot:hover {
    transform: scale(1.3);
}

/* Filter panel */
.filter-label {
    display: block;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}
.filter-input {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 13px;
    font-family: inherit;
    color-scheme: dark;
    min-width: 150px;
}
.filter-input:focus {
    outline: none;
    border-color: var(--accent);
}
.filter-range {
    width: 140px;
    accent-color: var(--accent);
    cursor: pointer;
}
.filter-summary {
    font-size: 12px;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
    margin-left: auto;
}