:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --bg: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
    --card-bg: rgba(255, 255, 255, 0.1);
    --text: #f8fafc;
    --text-secondary: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg);
    background-attachment: fixed;
    color: var(--text);
    min-height: 100vh;
}

.app {
    max-width: 480px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    margin-bottom: 24px;
}

header h1 {
    font-size: 1.75rem;
    margin-bottom: 4px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

main {
    flex: 1;
}

.refresh-btn {
    width: 100%;
    padding: 16px 24px;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.refresh-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(14, 165, 233, 0.3);
}

.refresh-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.refresh-btn .icon {
    font-size: 1.3rem;
}

.loading {
    text-align: center;
    padding: 48px 24px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}

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

.error {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    margin-top: 24px;
}

.error-detail {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 8px;
}

.weather {
    margin-top: 24px;
}

.timestamp {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.station-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
}

.station-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.station-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.station-id {
    color: var(--text-secondary);
    font-size: 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 8px;
    border-radius: 4px;
}

.data-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
}

.data-row .emoji {
    font-size: 1.5rem;
}

.data-row .value {
    font-size: 1.5rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.data-row .unit {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.data-row.secondary {
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 4px 0;
}

.data-row.secondary .value {
    font-size: 1rem;
    font-weight: 500;
    margin-left: auto;
}

footer {
    text-align: center;
    padding-top: 24px;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

footer p {
    margin: 4px 0;
}

.hidden {
    display: none !important;
}

/* Animation for cards */
.station-card {
    animation: fadeInUp 0.4s ease-out;
}

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

.station-card:nth-child(2) {
    animation-delay: 0.1s;
}