/* ============================================
   Weather Station — Design System
   ============================================
   Modern glassmorphism dashboard with dark/light theme
   ============================================ */

/* ─── CSS Custom Properties (Design Tokens) ─── */
:root {
    /* Dark theme (default) */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: rgba(30, 41, 59, 0.7);
    --bg-card-hover: rgba(30, 41, 59, 0.85);
    --bg-glass: rgba(15, 23, 42, 0.6);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-color: rgba(148, 163, 184, 0.12);
    --border-glow: rgba(56, 189, 248, 0.2);

    --accent-blue: #38bdf8;
    --accent-cyan: #22d3ee;
    --accent-green: #4ade80;
    --accent-yellow: #facc15;
    --accent-orange: #fb923c;
    --accent-red: #f87171;
    --accent-purple: #a78bfa;
    --accent-pink: #f472b6;

    --gradient-primary: linear-gradient(135deg, #0ea5e9, #8b5cf6);
    --gradient-warm: linear-gradient(135deg, #f97316, #ef4444);
    --gradient-cool: linear-gradient(135deg, #06b6d4, #3b82f6);
    --gradient-nature: linear-gradient(135deg, #10b981, #3b82f6);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(56, 189, 248, 0.15);

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    --header-height: 72px;
}

/* ─── Light Theme ─── */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #e2e8f0;
    --bg-card: rgba(255, 255, 255, 0.75);
    --bg-card-hover: rgba(255, 255, 255, 0.9);
    --bg-glass: rgba(248, 250, 252, 0.7);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --border-color: rgba(148, 163, 184, 0.2);
    --border-glow: rgba(14, 165, 233, 0.15);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 30px rgba(14, 165, 233, 0.1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ─── Animated Background ─── */
.bg-gradient {
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(56, 189, 248, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 80% 20%, rgba(139, 92, 246, 0.06), transparent),
        radial-gradient(ellipse 50% 60% at 50% 80%, rgba(16, 185, 129, 0.04), transparent);
    animation: bgShift 20s ease-in-out infinite alternate;
}

@keyframes bgShift {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
    100% { opacity: 1; transform: scale(1); }
}

.bg-particles {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--accent-blue);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat linear infinite;
}

@keyframes particleFloat {
    0% { opacity: 0; transform: translateY(100vh) scale(0); }
    10% { opacity: 0.6; }
    90% { opacity: 0.6; }
    100% { opacity: 0; transform: translateY(-10vh) scale(1); }
}

/* ─── Header ─── */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    background: var(--bg-glass);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-left {
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-icon {
    font-size: 2rem;
    filter: drop-shadow(0 2px 8px rgba(56, 189, 248, 0.3));
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

.logo-text h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
    letter-spacing: 0.02em;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.last-update {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.pulse-dot.error {
    background: var(--accent-red);
}

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

.theme-toggle {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--bg-card);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-blue);
    transform: rotate(20deg);
}

/* ─── Main Content ─── */
.main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 32px 24px;
}

/* ─── Card Base ─── */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(16px) saturate(1.3);
    -webkit-backdrop-filter: blur(16px) saturate(1.3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.card-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover .card-glow {
    opacity: 1;
}

.temperature-card .card-glow { background: var(--gradient-warm); }
.humidity-card .card-glow { background: var(--gradient-cool); }
.pressure-card .card-glow { background: var(--gradient-nature); }

.card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.card-icon {
    font-size: 1.3rem;
}

.card-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ─── Hero Cards ─── */
.hero-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

.hero-card .card-value {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 12px;
}

.value-number {
    font-size: 3rem;
    font-weight: 800;
    font-family: var(--font-mono);
    letter-spacing: -0.03em;
    line-height: 1;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.temperature-card .value-number {
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    background-clip: text;
}

.humidity-card .value-number {
    background: var(--gradient-cool);
    -webkit-background-clip: text;
    background-clip: text;
}

.pressure-card .value-number {
    background: var(--gradient-nature);
    -webkit-background-clip: text;
    background-clip: text;
}

.value-unit {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-muted);
}

.card-detail {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.detail-sep {
    opacity: 0.4;
}

/* Humidity bar */
.humidity-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
}

.humidity-fill {
    height: 100%;
    background: var(--gradient-cool);
    border-radius: 3px;
    transition: width var(--transition-slow);
}

/* Pressure trend */
.trend-icon {
    font-size: 1.1rem;
    transition: transform var(--transition-normal);
}

.trend-rising .trend-icon { transform: rotate(-45deg); color: var(--accent-red); }
.trend-falling .trend-icon { transform: rotate(45deg); color: var(--accent-blue); }
.trend-stable .trend-icon { color: var(--accent-green); }

/* ─── Secondary Cards ─── */
.secondary-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}

/* Wind Card */
.wind-content {
    display: flex;
    align-items: center;
    gap: 20px;
}

.wind-compass {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
}

.compass-svg {
    width: 100%;
    height: 100%;
}

.compass-ring {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 1;
}

.compass-ring-inner {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 0.5;
    stroke-dasharray: 2 4;
}

.compass-text {
    fill: var(--text-muted);
    font-size: 9px;
    font-weight: 600;
    text-anchor: middle;
    dominant-baseline: central;
    font-family: var(--font-sans);
}

.compass-text.cardinal {
    fill: var(--text-secondary);
    font-size: 10px;
    font-weight: 700;
}

.compass-arrow {
    stroke: var(--accent-cyan);
    stroke-width: 2.5;
    stroke-linecap: round;
    filter: drop-shadow(0 0 4px rgba(34, 211, 238, 0.5));
}

.compass-arrowhead {
    fill: var(--accent-cyan);
    filter: drop-shadow(0 0 4px rgba(34, 211, 238, 0.5));
}

.compass-center {
    fill: var(--text-secondary);
}

#compassArrow {
    transition: transform var(--transition-slow);
}

.wind-data {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.wind-speed {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.wind-value {
    font-size: 2rem;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--accent-cyan);
}

.wind-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.wind-gust {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
}

.wind-gust-label {
    color: var(--text-muted);
}

.wind-gust-value {
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-weight: 500;
}

.wind-direction-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Rain Card */
.rain-content {
    position: relative;
    min-height: 80px;
}

.rain-value-main {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.rain-card .value-number {
    font-size: 2.5rem;
    background: var(--gradient-cool);
    -webkit-background-clip: text;
    background-clip: text;
}

.rain-drops {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.rain-drops.active {
    opacity: 1;
}

.rain-drop {
    position: absolute;
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--accent-blue));
    border-radius: 0 0 2px 2px;
    animation: rainFall linear infinite;
    opacity: 0.4;
}

@keyframes rainFall {
    0% { transform: translateY(-20px); opacity: 0; }
    20% { opacity: 0.4; }
    100% { transform: translateY(100px); opacity: 0; }
}

/* UV Card */
.uv-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.uv-gauge {
    width: 100%;
}

.uv-gauge-bar {
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(90deg,
        #4ade80 0%,
        #facc15 25%,
        #fb923c 50%,
        #ef4444 75%,
        #a855f7 100%
    );
    position: relative;
    overflow: visible;
}

.uv-gauge-fill {
    position: absolute;
    inset: 0;
    border-radius: 4px;
}

.uv-gauge-marker {
    position: absolute;
    top: 50%;
    width: 16px;
    height: 16px;
    background: white;
    border: 3px solid var(--accent-yellow);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    left: 0%;
    transition: left var(--transition-slow);
    box-shadow: 0 0 8px rgba(250, 204, 21, 0.5);
}

.uv-gauge-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.uv-value-display {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.uv-number {
    font-size: 2rem;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--accent-yellow);
}

.uv-level {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: var(--radius-sm);
    background: rgba(250, 204, 21, 0.15);
    color: var(--accent-yellow);
}

.uv-level.low { background: rgba(74, 222, 128, 0.15); color: var(--accent-green); }
.uv-level.moderate { background: rgba(250, 204, 21, 0.15); color: var(--accent-yellow); }
.uv-level.high { background: rgba(251, 146, 60, 0.15); color: var(--accent-orange); }
.uv-level.very-high { background: rgba(248, 113, 113, 0.15); color: var(--accent-red); }
.uv-level.extreme { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); }

/* Illuminance Card */
.illuminance-card .value-number {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--accent-yellow), var(--accent-orange));
    -webkit-background-clip: text;
    background-clip: text;
}

.illuminance-text {
    font-weight: 500;
}

/* ─── Charts Section ─── */
.charts-section {
    margin-top: 16px;
}

.charts-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.section-title {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.time-range-selector {
    display: flex;
    gap: 4px;
    padding: 4px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    backdrop-filter: blur(8px);
}

.range-btn {
    padding: 6px 14px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.range-btn:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.range-btn.active {
    background: var(--accent-blue);
    color: #0f172a;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.chart-card {
    padding: 20px;
}

.chart-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.chart-container {
    position: relative;
    height: 240px;
}

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

/* ─── Footer ─── */
.footer {
    margin-top: 48px;
    padding: 24px;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-content p {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.footer-sub {
    margin-top: 4px;
    font-size: 0.72rem !important;
    opacity: 0.6;
}

/* ─── Loading & Error States ─── */
.card.loading {
    position: relative;
}

.card.loading::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg,
        transparent,
        rgba(56, 189, 248, 0.05),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.card.error {
    border-color: rgba(248, 113, 113, 0.3);
}

/* ─── Responsive Design ─── */
@media (max-width: 1200px) {
    .secondary-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .hero-cards {
        grid-template-columns: 1fr;
    }

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

    .value-number {
        font-size: 2.5rem;
    }
}

@media (max-width: 640px) {
    .main {
        padding: 16px 12px;
    }

    .header-content {
        padding: 0 12px;
    }

    .logo-text h1 {
        font-size: 1rem;
    }

    .secondary-cards {
        grid-template-columns: 1fr;
    }

    .wind-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .charts-header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .time-range-selector {
        width: 100%;
        justify-content: space-between;
    }

    .range-btn {
        flex: 1;
        text-align: center;
    }

    .card {
        padding: 18px;
    }

    .chart-container {
        height: 200px;
    }
}

/* ─── Animations ─── */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Card entrance animation */
.card {
    animation: cardFadeIn 0.6s ease-out both;
}

.hero-cards .card:nth-child(1) { animation-delay: 0.1s; }
.hero-cards .card:nth-child(2) { animation-delay: 0.2s; }
.hero-cards .card:nth-child(3) { animation-delay: 0.3s; }
.secondary-cards .card:nth-child(1) { animation-delay: 0.35s; }
.secondary-cards .card:nth-child(2) { animation-delay: 0.4s; }
.secondary-cards .card:nth-child(3) { animation-delay: 0.45s; }
.secondary-cards .card:nth-child(4) { animation-delay: 0.5s; }

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Value update flash */
.value-flash {
    animation: flashUpdate 0.6s ease-out;
}

@keyframes flashUpdate {
    0% { opacity: 0.6; transform: scale(0.95); }
    50% { opacity: 1; transform: scale(1.02); }
    100% { opacity: 1; transform: scale(1); }
}