@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Dark Theme (Default) */
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d2e;
    --bg-card: #1e2235;
    --bg-card-hover: #252a42;
    --border: #2a2f45;
    --text-primary: #e8eaed;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --green: #22c55e;
    --yellow: #eab308;
    --orange: #f97316;
    --red: #ef4444;
    --cyan: #06b6d4;
    --purple: #8b5cf6;
    --gradient-1: linear-gradient(135deg, #3b82f6, #8b5cf6);
    --gradient-2: linear-gradient(135deg, #22c55e, #06b6d4);
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);

    /* Used for chart axes */
    --chart-grid: rgba(255, 255, 255, 0.04);
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --border: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent: #0ea5e9;
    --accent-glow: rgba(14, 165, 233, 0.15);
    --green: #16a34a;
    --yellow: #ca8a04;
    --orange: #ea580c;
    --red: #dc2626;
    --cyan: #0891b2;
    --purple: #7c3aed;
    --gradient-1: linear-gradient(135deg, #0ea5e9, #7c3aed);
    --gradient-2: linear-gradient(135deg, #16a34a, #0891b2);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
    --chart-grid: rgba(0, 0, 0, 0.04);
}

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

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

a {
    color: var(--accent);
    text-decoration: none;
}

/* ── Layout ─────────────────────────────── */
.app-header {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-bottom: 1px solid var(--border);
    padding: 20px 32px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.header-brand {
    min-width: 0;
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.app-header .subtitle {
    font-size: .85rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.header-actions {
    display: flex;
    align-items: center;
    justify-self: end;
    justify-content: flex-end;
    gap: 12px;
    min-width: 0;
}

.header-update {
    font-size: .8rem;
    color: var(--text-muted);
    text-align: right;
    line-height: 1.3;
    white-space: nowrap;
}

.btn.header-theme-toggle {
    padding: 4px 8px;
    font-size: 1.2rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    flex: 0 0 auto;
    justify-content: center;
    line-height: 1;
    min-width: 42px;
}

.btn.header-theme-toggle:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    justify-self: center;
    gap: 8px;
    font-size: .85rem;
    color: var(--text-muted);
    min-width: 0;
    max-width: min(48vw, 44rem);
    white-space: nowrap;
    overflow: hidden;
}

.breadcrumb span {
    cursor: pointer;
    transition: color .2s;
    white-space: nowrap;
}

.breadcrumb span:hover {
    color: var(--accent);
}

.breadcrumb .sep {
    color: var(--text-muted);
}

.breadcrumb .current {
    color: var(--text-primary);
    font-weight: 500;
    display: inline-block;
    max-width: min(42vw, 34ch);
    overflow: hidden;
    text-overflow: ellipsis;
    vertical-align: bottom;
}

.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px 32px 64px;
}

.view {
    display: none;
    animation: fadeIn .3s ease;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px)
    }

    to {
        opacity: 1;
        transform: translateY(0)
    }
}

/* ── Cards ──────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all .25s;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.card-grid {
    display: grid;
    gap: 20px;
    margin-bottom: 28px;
}

.card-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.card-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media(max-width:900px) {
    .app-header {
        grid-template-columns: 1fr auto;
        grid-template-areas:
            "brand actions"
            "breadcrumb breadcrumb";
        align-items: start;
    }

    .header-brand {
        grid-area: brand;
    }

    .header-actions {
        grid-area: actions;
        gap: 10px;
    }

    .breadcrumb {
        grid-area: breadcrumb;
        justify-content: flex-start;
        padding-top: 4px;
    }

    .breadcrumb .current {
        max-width: 100%;
    }

    .card-grid-2,
    .card-grid-3,
    .card-grid-4 {
        grid-template-columns: 1fr;
    }
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    margin: 8px 0 4px;
}

.stat-label {
    font-size: .8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: .5px;
}

.stat-sub {
    font-size: .75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ── Location Cards ─────────────────────── */
.location-card {
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.location-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity .3s;
}

.location-card:hover::before {
    opacity: 1;
}

.location-card .city-name {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.location-card .city-name .emoji {
    font-size: 1.6rem;
}

.location-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.location-info .info-item {
    text-align: center;
    padding: 10px;
    background: rgba(255, 255, 255, .03);
    border-radius: 8px;
}

.location-info .info-item .val {
    font-size: 1.4rem;
    font-weight: 700;
}

.location-info .info-item .lbl {
    font-size: .7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: 2px;
}

/* ── Section Titles ─────────────────────── */
.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title .icon {
    font-size: 1.2rem;
}

/* ── Map ────────────────────────────────── */
.map-container {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    margin-bottom: 28px;
    height: 350px;
}

.map-container.detail-map {
    height: 400px;
}

/* ── Table ──────────────────────────────── */
.table-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
    align-items: center;
}

.table-controls select,
.table-controls input {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 8px 14px;
    border-radius: 8px;
    font-size: .85rem;
    font-family: inherit;
    transition: border-color .2s;
}

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

.table-controls input {
    flex: 1;
    min-width: 200px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .85rem;
}

.data-table thead th {
    text-align: left;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border);
    font-weight: 600;
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}

.data-table thead th:hover {
    color: var(--accent);
}

.data-table thead th .sort-icon {
    margin-left: 4px;
    font-size: .7rem;
}

.data-table tbody tr {
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background .2s;
}

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

.data-table tbody td {
    padding: 12px 16px;
}

.pf-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: .75rem;
    font-weight: 600;
}

/* ── pF Status Cards ────────────────────── */
.pf-status-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    margin-bottom: 28px;
}

@media(max-width:900px) {
    .pf-status-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.pf-status-card {
    text-align: center;
    padding: 16px 8px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-card);
}

.pf-status-card .count {
    font-size: 2rem;
    font-weight: 800;
}

.pf-status-card .label {
    font-size: .7rem;
    color: var(--text-secondary);
    margin-top: 4px;
    text-transform: uppercase;
}

/* ── Sensor Detail ──────────────────────── */
.detail-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.detail-header h2 {
    font-size: 1.4rem;
    font-weight: 700;
}

.detail-meta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.meta-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: .8rem;
    color: var(--text-secondary);
}

.meta-chip .chip-val {
    color: var(--text-primary);
    font-weight: 500;
}

.chart-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 24px;
    position: relative;
}

.chart-container canvas {
    width: 100% !important;
    height: 300px !important;
}

/* ── Buttons ────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: .85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
    font-family: inherit;
}

.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--gradient-1);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(59, 130, 246, .3);
}

.btn-primary:disabled {
    opacity: .5;
    cursor: not-allowed;
    transform: none;
}

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

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

.btn-back {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    font-size: .85rem;
    cursor: pointer;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 16px;
}

.btn-back:hover {
    color: var(--text-primary);
}

/* ── Info Cards Row ─────────────────────── */
.info-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
}

.info-card h4 {
    font-size: .8rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: .5px;
    margin-bottom: 8px;
}

.info-card ul {
    list-style: none;
}

.info-card ul li {
    font-size: .85rem;
    padding: 4px 0;
    display: flex;
    justify-content: space-between;
}

.info-card ul li .count {
    font-weight: 600;
    color: var(--accent);
}

/* ── Loading ────────────────────────────── */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    flex-direction: column;
    gap: 16px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin .8s linear infinite;
}

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

.loading-text {
    font-size: .9rem;
    color: var(--text-secondary);
}

/* ── Tooltip for map markers ────────────── */
.leaflet-popup-content-wrapper {
    background: var(--bg-card) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border) !important;
    border-radius: 8px !important;
}

.leaflet-popup-tip {
    background: var(--bg-card) !important;
}

.leaflet-popup-content {
    font-family: 'Inter', sans-serif !important;
    font-size: .85rem !important;
}