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

:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-card: #0f3460;
    --accent: #e94560;
    --accent-warm: #ff6b35;
    --accent-cool: #4da8da;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --success: #4ade80;
    --danger: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    padding: 30px 0;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 5px;
    background: linear-gradient(90deg, var(--accent-warm), var(--accent-cool));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

main {
    flex: 1;
}

.settings-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.settings-card h2 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 10px;
}

.device-info {
    background: rgba(0, 0, 0, 0.2);
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.device-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 6px 0;
}

.device-info strong {
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.2);
}

.form-group input[type="time"] {
    font-size: 1.5rem;
    text-align: center;
    font-weight: 600;
}

.time-display {
    text-align: center;
    margin-top: 20px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
}

.time-display #currentTime {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: 'SF Mono', Monaco, monospace;
    display: block;
}

.time-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.phase-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.phase {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
}

.phase-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    flex-shrink: 0;
}

.phase-icon.warm {
    background: linear-gradient(135deg, #ff6b35, #f7931e, #ffcc00);
    box-shadow: 0 0 20px rgba(255, 107, 53, 0.5);
}

.phase-icon.cool {
    background: linear-gradient(135deg, #4da8da, #6ec1e4, #87ceeb);
    box-shadow: 0 0 20px rgba(77, 168, 218, 0.5);
}

.phase-details h3 {
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.phase-details p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 2px 0;
}

.phase-color {
    font-style: italic;
}

.alarm-toggle {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.1);
    transition: 0.4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
}

input:checked + .slider {
    background: linear-gradient(90deg, var(--accent-warm), var(--accent));
}

input:checked + .slider:before {
    transform: translateX(26px);
}

#alarmStatus {
    font-size: 1.1rem;
    font-weight: 600;
}

.alarm-info {
    background: rgba(0, 0, 0, 0.2);
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 20px;
}

.alarm-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 6px 0;
}

.alarm-info strong {
    color: var(--text-primary);
}

.progress-section {
    margin-bottom: 20px;
}

.progress-section h3 {
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.progress-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-warm), var(--accent-cool));
    border-radius: 4px;
    transition: width 0.5s ease;
}

#progressText {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.current-state {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.current-state strong {
    color: var(--text-primary);
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn {
    padding: 16px 24px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-warm), var(--accent));
    color: white;
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(233, 69, 96, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.status {
    margin-top: 12px;
    padding: 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    text-align: center;
}

.status.success {
    background: rgba(74, 222, 128, 0.2);
    color: var(--success);
}

.status.error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.status:empty {
    display: none;
}

.hidden {
    display: none !important;
}

footer {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

@media (max-width: 400px) {
    .container {
        padding: 12px;
    }
    
    header h1 {
        font-size: 1.6rem;
    }
    
    .settings-card {
        padding: 18px;
    }
    
    .time-display #currentTime {
        font-size: 2rem;
    }
}

/* Animation for active sunrise */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.sunrise-active {
    animation: pulse 2s infinite;
}