/* ============================================================
   Red de Estaciones Meteorologicas - Landing Page Styles
   Dark theme, responsive, matching dashboard aesthetic
   ============================================================ */

:root {
    --bg: #0f1923;
    --bg-alt: #141e2a;
    --card: #1a2634;
    --card-hover: #1e2d3e;
    --card-border: #2a3a4d;
    --card-border-hover: #4fc3f7;
    --accent: #4fc3f7;
    --accent-hover: #81d4fa;
    --accent-glow: rgba(79, 195, 247, 0.15);
    --text: #e0e6ed;
    --text-muted: #8899aa;
    --text-dim: #566676;
    --green: #66bb6a;
    --yellow: #ffa726;
    --gray: #546e7a;
    --red: #ef5350;
    --temp-color: #ff7043;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --transition: 0.2s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: var(--accent-hover);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================================
   HEADER
   ============================================================ */

.site-header {
    background: linear-gradient(135deg, #0d1520 0%, #162638 50%, #0d1520 100%);
    border-bottom: 1px solid var(--card-border);
    padding: 48px 0 40px;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
}

.header-title h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.header-subtitle {
    font-size: 1.1rem;
    color: var(--accent);
    font-weight: 500;
    margin-top: 4px;
}

.header-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    background: rgba(26, 38, 52, 0.7);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 16px 28px;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

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

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--card-border);
}

/* ============================================================
   MAP
   ============================================================ */

.map-section {
    padding: 32px 0 0;
}

#map {
    width: 100%;
    height: 400px;
    border-radius: var(--radius);
    border: 1px solid var(--card-border);
    z-index: 1;
}

/* Leaflet dark theme overrides */
.leaflet-tile-pane {
    filter: brightness(0.85) contrast(1.1) saturate(0.8);
}

.leaflet-popup-content-wrapper {
    background: var(--card);
    color: var(--text);
    border-radius: var(--radius-sm);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
}

.leaflet-popup-content {
    margin: 14px 18px;
    font-size: 0.9rem;
    line-height: 1.6;
}

.leaflet-popup-tip {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-top: none;
    border-left: none;
}

.leaflet-popup-content a {
    color: var(--accent);
}

.leaflet-popup-content .popup-name {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 4px;
}

.leaflet-popup-content .popup-location {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.leaflet-popup-content .popup-metrics {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}

.leaflet-popup-content .popup-metric {
    font-size: 0.85rem;
}

.leaflet-popup-content .popup-metric strong {
    color: var(--accent);
}

.leaflet-popup-content .popup-link {
    display: inline-block;
    margin-top: 4px;
    font-size: 0.85rem;
    font-weight: 500;
}

.leaflet-control-zoom a {
    background: var(--card) !important;
    color: var(--text) !important;
    border-color: var(--card-border) !important;
}

.leaflet-control-zoom a:hover {
    background: var(--card-hover) !important;
}

.leaflet-control-attribution {
    background: rgba(15, 25, 35, 0.8) !important;
    color: var(--text-dim) !important;
}

.leaflet-control-attribution a {
    color: var(--text-muted) !important;
}

.map-legend {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.legend-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.legend-dot.online {
    background: var(--green);
    box-shadow: 0 0 6px var(--green);
}

.legend-dot.stale {
    background: var(--yellow);
    box-shadow: 0 0 6px var(--yellow);
}

.legend-dot.offline {
    background: var(--gray);
}

/* ============================================================
   SEARCH / FILTER
   ============================================================ */

.filter-section {
    padding: 24px 0;
}

.filter-bar {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.filter-search {
    flex: 1;
    min-width: 250px;
    position: relative;
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dim);
    pointer-events: none;
}

.filter-search input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.95rem;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.filter-search input::placeholder {
    color: var(--text-dim);
}

.filter-search input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.filter-select {
    min-width: 220px;
}

.filter-select select {
    width: 100%;
    padding: 12px 16px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.95rem;
    cursor: pointer;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%238899aa'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.filter-select select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.filter-select select option {
    background: var(--card);
    color: var(--text);
}

/* ============================================================
   STATION CARDS GRID
   ============================================================ */

.stations-section {
    padding: 0 0 48px;
}

.stations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.station-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 24px;
    cursor: pointer;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    text-decoration: none;
    color: inherit;
    display: block;
}

.station-card:hover {
    border-color: var(--card-border-hover);
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-2px);
    color: inherit;
}

.station-card.dimmed {
    opacity: 0.6;
}

.card-header {
    margin-bottom: 16px;
}

.card-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 2px;
}

.card-location {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.card-status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 4px;
    flex-shrink: 0;
}

.card-status-dot.online {
    background: var(--green);
    box-shadow: 0 0 4px var(--green);
}

.card-status-dot.stale {
    background: var(--yellow);
    box-shadow: 0 0 4px var(--yellow);
}

.card-status-dot.offline {
    background: var(--gray);
}

.card-body {
    display: flex;
    align-items: flex-end;
    gap: 20px;
}

.card-temp {
    font-size: 3rem;
    font-weight: 700;
    color: var(--temp-color);
    line-height: 1;
    letter-spacing: -1px;
}

.card-temp .unit {
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--text-muted);
    vertical-align: super;
}

.card-metrics {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.card-metric {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.card-metric svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.card-metric .metric-value {
    color: var(--text);
    font-weight: 500;
}

.card-footer {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-updated {
    font-size: 0.8rem;
    color: var(--text-dim);
}

.card-hardware {
    font-size: 0.75rem;
    color: var(--text-dim);
    background: rgba(79, 195, 247, 0.08);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Loading state */
.loading-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 60px 20px;
    color: var(--text-muted);
}

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

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

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

.empty-state svg {
    margin-bottom: 16px;
    opacity: 0.4;
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.text-muted {
    color: var(--text-dim);
    font-size: 0.9rem;
}

/* ============================================================
   CTA
   ============================================================ */

.cta-section {
    background: linear-gradient(135deg, rgba(79, 195, 247, 0.1) 0%, rgba(79, 195, 247, 0.05) 100%);
    border-top: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
    padding: 56px 0;
}

.cta-content {
    text-align: center;
    max-width: 560px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

.cta-content p {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 28px;
    line-height: 1.7;
}

.btn-primary {
    display: inline-block;
    padding: 14px 36px;
    background: var(--accent);
    color: #0f1923;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    text-decoration: none;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #0f1923;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(79, 195, 247, 0.3);
}

/* ============================================================
   CONNECTION INFO
   ============================================================ */

.info-section {
    padding: 56px 0;
}

.info-section h3 {
    text-align: center;
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 32px;
    color: var(--text);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

.info-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 28px;
    text-align: center;
}

.info-icon {
    color: var(--accent);
    margin-bottom: 16px;
    display: flex;
    justify-content: center;
}

.info-card h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.info-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
    border-top: 1px solid var(--card-border);
    padding: 36px 0;
    background: var(--bg-alt);
}

.footer-content {
    text-align: center;
}

.footer-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.footer-subtitle {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 12px;
}

.footer-admin {
    font-size: 0.8rem;
    color: var(--text-dim);
    opacity: 0.5;
    transition: opacity var(--transition);
}

.footer-admin:hover {
    opacity: 1;
    color: var(--text-muted);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
    .site-header {
        padding: 32px 0 28px;
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    .header-title h1 {
        font-size: 1.5rem;
    }

    .header-stats {
        width: 100%;
        justify-content: center;
        padding: 12px 20px;
    }

    #map {
        height: 300px;
        border-radius: var(--radius-sm);
    }

    .filter-bar {
        flex-direction: column;
    }

    .filter-search,
    .filter-select {
        min-width: unset;
        width: 100%;
    }

    .stations-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .card-temp {
        font-size: 2.5rem;
    }

    .cta-section {
        padding: 40px 0;
    }

    .cta-content h2 {
        font-size: 1.3rem;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .map-legend {
        gap: 12px;
        font-size: 0.8rem;
    }
}

@media (max-width: 400px) {
    .container {
        padding: 0 16px;
    }

    .header-title h1 {
        font-size: 1.3rem;
    }

    .card-body {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .stat-value {
        font-size: 1.4rem;
    }
}