/* =========================
   CSS RESET & VARIABLES
========================= */
*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    --bg-dark: #020617;
    --bg-glass: rgba(15, 23, 42, 0.65);
    --border-glass: rgba(255, 255, 255, 0.08);

    --text-main: #f8fafc;
    --text-muted: #94a3b8;

    --accent: #38bdf8;
    --warning: #f59e0b;
    --danger: #ef4444;

    --radius-lg: 20px;
    --radius-md: 12px;
}

/* =========================
   BASE
========================= */
html, body {
    margin: 0;
    padding: 0;
}

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

/* =========================
   WEATHER SCENE LAYER
========================= */
.weather-scene {
    position: fixed;
    inset: 0;
    z-index: -1;
    background: linear-gradient(
        to bottom,
        #020617 0%,
        #020617 40%,
        #020617 100%
    );
    overflow: hidden;
}

/* =========================
   APP CONTAINER
========================= */
.app {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px;
}

/* =========================
   HEADER
========================= */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.app-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin: 0;
}

.app-title span {
    color: var(--accent);
}

.subtitle {
    margin-top: 8px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* =========================
   CURRENT WEATHER CARD
========================= */
.current-weather {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.6);
    margin-bottom: 40px;
}

.location {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.temperature {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1;
}

.temperature sup {
    font-size: 1.5rem;
}

.condition {
    margin-top: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
}

.meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
    margin-top: 24px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* =========================
   ALERTS
========================= */
.alerts {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 32px;
    color: #fecaca;
    font-size: 0.9rem;
}

/* =========================
   FORECAST
========================= */
.forecast h2 {
    margin-bottom: 16px;
    font-size: 1.3rem;
}

.forecast-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
}

.forecast-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: center;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.forecast-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

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

.forecast-temp {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 8px;
}

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

/* =========================
   FOOTER
========================= */
footer {
    margin-top: 60px;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

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

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 768px) {
    .app {
        padding: 16px;
    }

    .app-title {
        font-size: 1.7rem;
    }

    .temperature {
        font-size: 3.2rem;
    }
}

@media (max-width: 480px) {
    .current-weather {
        padding: 24px 16px;
    }

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