/* =============================================================
   Where To Breathe — Greece Air Quality Monitor
   Main Stylesheet
   ============================================================= */

/* ===== CSS Variables ===== */
:root {
    --bg-primary: #f0f4f8;
    --bg-card: #ffffff;
    --bg-header: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    --accent-green: #38a169;
    --accent-yellow: #d69e2e;
    --accent-orange: #dd6b20;
    --accent-red: #e53e3e;
    --accent-purple: #805ad5;
    --accent-blue: #3182ce;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== Header ===== */
.header {
    background: var(--bg-header);
    color: white;
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 2000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-brand svg {
    width: 32px;
    height: 32px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.header-brand h1 {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.header-brand .subtitle {
    font-size: 0.75rem;
    opacity: 0.7;
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.header-status {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.8rem;
}

.live-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(56, 161, 105, 0.2);
    border: 1px solid rgba(56, 161, 105, 0.4);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 500;
}

.live-dot {
    width: 8px;
    height: 8px;
    background: #38a169;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(0.8);
    }
}

.last-updated {
    opacity: 0.6;
}

/* ===== Main Layout ===== */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

/* ===== Stats Bar ===== */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-info {
    flex: 1;
}

.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    font-weight: 600;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.2;
}

.stat-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== Content Grid ===== */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    grid-template-rows: auto auto;
    gap: 24px;
    margin-bottom: 24px;
}

/* ===== Cards ===== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h2 {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-header h2 svg {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.card-body {
    padding: 20px;
}

/* ===== Map ===== */
.map-card {
    display: flex;
    flex-direction: column;
    grid-row: 1;
    grid-column: 1;
}

.map-card .card-body {
    padding: 0;
    flex: 1;
    min-height: 300px;
}

#map {
    height: 100%;
    width: 100%;
}

/* ===== Sidebar ===== */
.sidebar {
    display: contents;
}

#weather-card {
    grid-column: 2;
    grid-row: 1;
}

#aqi-card {
    grid-column: 2;
    grid-row: 2;
    align-self: stretch;
}

#forecast-section {
    grid-column: 1;
    grid-row: 2;
    align-self: stretch;
    margin-bottom: 0;
    display: flex;
    flex-direction: column;
}

#forecast-section > .card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

#forecast-section .forecast-grid {
    flex: 1;
}

/* ===== Weather Panel ===== */
.weather-panel {
    text-align: center;
    padding: 24px 20px;
}

.weather-location {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.weather-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.weather-main {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
}

.weather-main img {
    width: 80px;
    height: 80px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.weather-temp-big {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
}

.weather-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: capitalize;
    margin-bottom: 20px;
}

.weather-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.weather-detail {
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    padding: 12px;
    text-align: center;
}

.weather-detail-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 4px;
}

.weather-detail-value {
    font-size: 1.1rem;
    font-weight: 600;
}

/* ===== AQI Gauge ===== */
.aqi-panel {
    padding: 24px 20px;
    text-align: center;
}

.aqi-gauge {
    position: relative;
    width: 160px;
    height: 160px;
    margin: 0 auto 16px;
}

.aqi-gauge-circle {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    border: 8px solid;
    transition: var(--transition);
}

.aqi-gauge-value {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
}

.aqi-gauge-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

.aqi-gauge-category {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.aqi-gauge-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    max-width: 250px;
    margin: 0 auto;
}

/* ===== Pollutant Cards ===== */
.pollutants-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.pollutant-card {
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    padding: 14px;
    text-align: center;
    border: 2px solid transparent;
    transition: var(--transition);
}

.pollutant-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.pollutant-name {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 6px;
}

.pollutant-value {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.pollutant-unit {
    font-size: 0.65rem;
    color: var(--text-muted);
}

.pollutant-bar {
    height: 4px;
    border-radius: 2px;
    background: #e2e8f0;
    margin-top: 8px;
    overflow: hidden;
}

.pollutant-bar-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.8s ease;
}

/* ===== Sensitivity Section ===== */
.sensitivity-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

.sensitivity-card .card-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sensitivity-options {
    display: flex;
    gap: 8px;
}

.sensitivity-btn {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    text-align: center;
}

.sensitivity-btn:hover {
    border-color: var(--accent-blue);
}

.sensitivity-btn.active {
    border-color: var(--accent-blue);
    background: rgba(49, 130, 206, 0.08);
    color: var(--accent-blue);
}

.sensitivity-btn .btn-icon {
    font-size: 1.3rem;
    margin-bottom: 4px;
    display: block;
}

/* ===== Results Panel ===== */
.result-panel {
    border-radius: var(--radius-md);
    padding: 20px;
    display: none;
    border: 2px solid;
    transition: var(--transition);
}

.result-panel.show {
    display: block;
    animation: slideIn 0.4s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-panel.good {
    background: rgba(56, 161, 105, 0.08);
    border-color: var(--accent-green);
}

.result-panel.moderate-result {
    background: rgba(214, 158, 46, 0.08);
    border-color: var(--accent-yellow);
}

.result-panel.poor {
    background: rgba(229, 62, 62, 0.08);
    border-color: var(--accent-red);
}

.result-header {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.result-message {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== Forecast Section ===== */
.forecast-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
}

.forecast-card {
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    padding: 12px 8px;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.forecast-card:hover,
.forecast-card.active {
    border-color: var(--accent-blue);
    background: rgba(49, 130, 206, 0.05);
}

.forecast-day {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.forecast-icon img {
    width: 40px;
    height: 40px;
    margin: 4px 0;
}

.forecast-temp {
    font-size: 1rem;
    font-weight: 700;
}

.forecast-aqi {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
    display: inline-block;
    margin-top: 6px;
}

/* ===== Chart ===== */
.chart-container {
    position: relative;
    height: 250px;
    width: 100%;
}

/* ===== Loading State ===== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    z-index: 9999;
    transition: opacity 0.5s;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    margin-top: 16px;
    font-weight: 500;
    color: var(--text-secondary);
}

.loading-sub {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
    opacity: 0.4;
}

.empty-state p {
    font-size: 0.9rem;
}

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

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

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: #cbd5e0;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a0aec0;
}

/* ===== Leaflet Popup Override ===== */
.leaflet-popup-content-wrapper {
    border-radius: var(--radius-sm) !important;
    box-shadow: var(--shadow-md) !important;
    font-family: 'Inter', sans-serif !important;
}

.leaflet-popup-content {
    margin: 12px 16px !important;
    line-height: 1.5 !important;
}

.popup-title {
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.popup-aqi {
    font-size: 0.8rem;
    margin-bottom: 2px;
}

.popup-weather {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.popup-badge {
    display: inline-block;
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 600;
}

/* ===== Refresh Button ===== */
.refresh-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.refresh-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.refresh-btn svg {
    width: 14px;
    height: 14px;
}

.refresh-btn.spinning svg {
    animation: spin 1s linear infinite;
}

/* ===== Marker Label ===== */
.marker-label {
    background: rgba(255, 255, 255, 0.9) !important;
    border: none !important;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15) !important;
    font-family: 'Inter', sans-serif !important;
    font-size: 0.7rem !important;
    font-weight: 600 !important;
    padding: 2px 6px !important;
    border-radius: 4px !important;
}

/* ===== Error Banner ===== */
.error-banner {
    background: rgba(229, 62, 62, 0.1);
    border: 1px solid rgba(229, 62, 62, 0.3);
    color: #e53e3e;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    display: none;
    font-size: 0.85rem;
}

.error-banner.show {
    display: block;
}

/* ===== AQI Color Utilities ===== */
.bg-good {
    background: rgba(56, 161, 105, 0.15);
    color: #38a169;
}

.bg-fair {
    background: rgba(72, 187, 120, 0.15);
    color: #38a169;
}

.bg-moderate {
    background: rgba(214, 158, 46, 0.15);
    color: #d69e2e;
}

.bg-poor {
    background: rgba(221, 107, 32, 0.15);
    color: #dd6b20;
}

.bg-very-poor {
    background: rgba(229, 62, 62, 0.15);
    color: #e53e3e;
}

.bg-extremely-poor {
    background: rgba(128, 90, 213, 0.15);
    color: #805ad5;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .content-grid {
        grid-template-columns: 1fr;
    }

    .header-inner {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

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

    .map-card {
        grid-row: auto;
        grid-column: auto;
    }

    #weather-card,
    #aqi-card,
    #forecast-section {
        grid-row: auto;
        grid-column: auto;
    }

    .map-card .card-body {
        min-height: 350px;
    }

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

@media (max-width: 600px) {
    .main-container {
        padding: 12px;
    }

    .stats-bar {
        grid-template-columns: 1fr;
    }

    .sensitivity-options {
        flex-direction: column;
    }

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

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