* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background: #0a1620; min-height: 100vh; display: flex; align-items: center; justify-content: center;
    padding: 16px; color: #ffffff;
}

/* 主容器 */
.app-container {
    max-width: 520px; width: 100%;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-radius: 48px;
    padding: 24px 20px 32px;
    border: 0.5px solid rgba(255, 255, 255, 0.15);
    transition: background 0.8s ease;
    box-shadow: 0 25px 50px -8px rgba(0, 0, 0, 0.6), 0 0 0 0.5px rgba(255, 255, 255, 0.08) inset;
}

/* 动态背景 */
.clear-bg { background: linear-gradient(135deg, #1b4a7a, #0d2137); }
.cloudy-bg { background: linear-gradient(135deg, #2c3e50, #1a2639); }
.rain-bg { background: linear-gradient(135deg, #163a5f, #0b1728); }
.snow-bg { background: linear-gradient(135deg, #2c3e50, #15263b); }
.fog-bg { background: linear-gradient(135deg, #1e2d3d, #0f1a28); }
.default-bg { background: linear-gradient(145deg, rgba(20, 40, 60, 0.85), rgba(8, 20, 35, 0.9)); }

/* 导航栏 */
.nav-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; padding: 0 4px; }
.location-section { display: flex; align-items: center; gap: 8px; }
.location-badge {
    display: flex; align-items: center; gap: 6px; background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px); padding: 8px 16px; border-radius: 40px;
    border: 0.5px solid rgba(255, 255, 255, 0.2);
}
.location-icon { font-size: 18px; color: #7FB4FF; }
#cityDisplay { font-size: 1rem; font-weight: 500; }
.header-controls { display: flex; gap: 8px; }
.icon-btn {
    background: rgba(255, 255, 255, 0.08); border: none; width: 42px; height: 42px;
    border-radius: 30px; display: flex; align-items: center; justify-content: center;
    color: rgba(255, 255, 255, 0.9); font-size: 1.1rem; cursor: pointer;
    backdrop-filter: blur(10px); border: 0.5px solid rgba(255, 255, 255, 0.15);
    transition: all 0.2s;
}
.icon-btn:hover { background: rgba(255, 255, 255, 0.18); transform: scale(0.95); }
.auto-refresh-btn.active { color: #7FB4FF; }

/* 骨架屏 */
.skeleton-container { padding: 20px 0; }
.skeleton-icon { width: 100px; height: 100px; margin: 0 auto 20px; background: rgba(255,255,255,0.08); border-radius: 50%; }
.skeleton-temp { width: 150px; height: 40px; margin: 0 auto 15px; background: rgba(255,255,255,0.08); border-radius: 8px; }
.skeleton-row { width: 80%; height: 15px; margin: 10px auto; background: rgba(255,255,255,0.05); border-radius: 4px; }
.skeleton-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 10px; margin-top: 25px; }
.skeleton-grid div { height: 60px; background: rgba(255,255,255,0.05); border-radius: 12px; }

/* 主内容 */
.main-content { display: flex; flex-direction: column; gap: 20px; }

/* 实时天气卡 */
.current-weather-card { display: flex; flex-direction: column; align-items: center; margin-bottom: 15px; }
.weather-icon-large { font-size: 5rem; margin-bottom: 4px; filter: drop-shadow(0 12px 18px rgba(0,0,0,0.5)); animation: float-icon 6s infinite ease-in-out; }
@keyframes float-icon { 0%,100%{transform:translateY(0);} 50%{transform:translateY(-6px);} }
.temperature-main { display: flex; align-items: flex-start; justify-content: center; margin-bottom: 4px; }
#tempNow { font-size: 5rem; font-weight: 300; letter-spacing: -0.03em; line-height: 1; }
.temp-unit-large { font-size: 1.8rem; font-weight: 300; margin-left: 2px; opacity: 0.8; }
.weather-desc-main { font-size: 1.5rem; font-weight: 450; margin-bottom: 4px; }
.feels-like-main { font-size: 0.95rem; opacity: 0.8; margin-bottom: 12px; }
.air-quality-tag {
    background: rgba(127, 180, 255, 0.2); backdrop-filter: blur(10px); padding: 6px 18px; border-radius: 30px; font-size: 0.9rem;
    border: 0.5px solid rgba(127,180,255,0.4); display: flex; align-items: center; gap: 6px; margin-bottom: 10px;
}
.sun-times { display: flex; gap: 20px; font-size: 0.85rem; opacity: 0.8; margin-bottom: 8px; }
.sun-times i { margin-right: 4px; color: #FFD966; }

/* 指标网格 */
.metrics-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; background: rgba(20, 35, 55, 0.5);
    backdrop-filter: blur(15px); border-radius: 28px; padding: 16px 8px; border: 0.5px solid rgba(255,255,255,0.1);
}
.metric-item { display: flex; flex-direction: column; align-items: center; }
.metric-icon { font-size: 1.2rem; margin-bottom: 4px; color: #7FB4FF; }
.metric-value { font-size: 1.1rem; font-weight: 500; }
.metric-label { font-size: 0.65rem; opacity: 0.7; text-transform: uppercase; letter-spacing: 0.3px; }

/* 预报卡片 */
.daily-section, .hourly-section { margin-bottom: 10px; }
.section-header { display: flex; justify-content: space-between; align-items: baseline; padding: 0 6px; margin-bottom: 10px; }
.section-header h3 { font-weight: 500; font-size: 1rem; opacity: 0.9; }
.daily-scroll, .hourly-scroll { display: flex; gap: 12px; overflow-x: auto; padding: 8px 0 12px; scrollbar-width: none; -ms-overflow-style: none; }
.daily-scroll::-webkit-scrollbar, .hourly-scroll::-webkit-scrollbar { display: none; }
.daily-card, .hourly-card {
    min-width: 70px; background: rgba(255, 255, 255, 0.06); backdrop-filter: blur(8px); border-radius: 20px;
    padding: 12px 6px; display: flex; flex-direction: column; align-items: center; border: 0.5px solid rgba(255, 255, 255, 0.1);
}
.daily-day { font-size: 0.8rem; font-weight: 500; margin-bottom: 4px; }
.daily-icon { font-size: 1.8rem; margin-bottom: 4px; }
.daily-temp { font-size: 0.85rem; }
.daily-temp span { font-size: 0.7rem; opacity: 0.7; }
.hourly-time { font-size: 0.85rem; font-weight: 500; margin-bottom: 6px; }
.hourly-icon { font-size: 1.5rem; margin-bottom: 6px; }
.hourly-temp { font-size: 1rem; font-weight: 500; }
.hourly-pop { font-size: 0.7rem; margin-top: 4px; }
.highlight-rain { color: #7FB4FF; font-weight: 600; }

/* 底部状态 */
.status-footer {
    margin-top: 18px; display: flex; justify-content: space-between; align-items: center; padding-top: 12px;
    border-top: 0.5px solid rgba(255, 255, 255, 0.1); font-size: 0.75rem; opacity: 0.7;
}

.spinner {
    display: inline-block; width: 1rem; height: 1rem; border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff; border-radius: 50%; animation: spin 0.8s linear infinite; vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 桌面双栏布局 */
@media (min-width: 768px) {
    body { padding: 40px; }
    .app-container { max-width: 900px; border-radius: 56px; padding: 32px 28px 38px; }
    .nav-header { margin-bottom: 32px; }
    .main-content { flex-direction: row; gap: 24px; }
    .left-panel { flex: 1.2; display: flex; flex-direction: column; align-items: center; }
    .right-panel { flex: 2; display: flex; flex-direction: column; gap: 20px; }
    .weather-icon-large { font-size: 6.5rem; }
    #tempNow { font-size: 6rem; }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); padding: 20px 16px; max-width: 100%; }
    .metric-value { font-size: 1.3rem; }
    .daily-card, .hourly-card { min-width: 80px; padding: 14px 8px; }
    .hourly-scroll { flex-wrap: wrap; overflow-x: visible; gap: 10px; }
    .hourly-card { min-width: 80px; }
}