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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    font-size: 15px;
    background: #f0f2f5;
    color: #1a1a2e;
}

.header {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #fff;
    padding: 20px 24px 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.header h1 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 14px;
    letter-spacing: -0.3px;
}

.nav-buttons {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.nav-buttons form {
    display: inline;
}

.nav-btn {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.2);
    padding: 7px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.nav-btn {
    text-decoration: none;
}

.nav-btn:hover {
    background: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.4);
}

.nav-btn.active {
    background: #4fc3f7;
    border-color: #4fc3f7;
    color: #1a1a2e;
    font-weight: 600;
}

.dashboard {
    padding: 16px 24px;
}

.current-readings {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.reading-card {
    background: #fff;
    border-radius: 10px;
    padding: 14px 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    transition: transform 0.15s, box-shadow 0.15s;
}

.reading-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.reading-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #8e99a4;
    margin-bottom: 4px;
    font-weight: 600;
}

.reading-value {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a2e;
}

.reading-unit {
    font-size: 13px;
    font-weight: 400;
    color: #8e99a4;
}

.reading-card.temp { border-left: 4px solid #f44336; }
.reading-card.dewpoint { border-left: 4px solid #1976d2; }
.reading-card.wind { border-left: 4px solid #78909c; }
.reading-card.gust { border-left: 4px solid #b0bec5; }
.reading-card.humidity { border-left: 4px solid #81c784; }
.reading-card.pressure { border-left: 4px solid #8d6e63; }
.reading-card.rain { border-left: 4px solid #64b5f6; }
.reading-card.rain-intensity { border-left: 4px solid #1565c0; }
.reading-card.uv { border-left: 4px solid #ff9800; }
.reading-card.solar { border-left: 4px solid #ffb74d; }

.last-update {
    font-size: 12px;
    color: #8e99a4;
    margin-bottom: 14px;
    padding-left: 2px;
}

.chart-container {
    background: #fff;
    border-radius: 10px;
    padding: 12px;
    margin-bottom: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.rain-charts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

.charts-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 60px 20px;
    color: #8e99a4;
    font-size: 14px;
}

.charts-loading .spinner {
    width: 22px;
    height: 22px;
    border: 3px solid #d6dbe0;
    border-top-color: #4fc3f7;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.date-picker-form {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

.date-input {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.2);
    padding: 7px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-family: inherit;
    color-scheme: dark;
}

.date-separator {
    color: rgba(255,255,255,0.5);
    font-size: 14px;
}

.records-section {
    margin-top: 20px;
}

.records-section h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 14px;
    color: #1a1a2e;
}


.record-time {
    font-size: 11px;
    color: #b0b8c1;
    margin-top: 4px;
}

@media (max-width: 768px) {
    .header { padding: 16px; }
    .dashboard { padding: 12px; }
    .current-readings { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .rain-charts { grid-template-columns: 1fr; }
    .reading-value { font-size: 18px; }
    .nav-btn { padding: 6px 12px; font-size: 12px; }
    .date-picker-form { flex-wrap: wrap; }
}