/* Time Notification App Styles */

:root {
    --primary-color: #007bff;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --secondary-color: #6c757d;
    --light-bg: #f8f9fa;
    --dark-text: #333;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--dark-text);
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, var(--primary-color), #0056b3);
    color: white;
    text-align: center;
    padding: 2rem;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.clock-section {
    background: var(--light-bg);
    padding: 2rem;
    text-align: center;
    border-bottom: 1px solid #e9ecef;
}

.digital-clock {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.date-display {
    font-size: 1.2rem;
    color: var(--secondary-color);
    font-weight: 500;
}

.status-section {
    padding: 1.5rem 2rem;
    text-align: center;
}

.status {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.status.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.status.warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.status.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.controls-section {
    padding: 2rem;
    background: white;
}

.button-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 140px;
    justify-content: center;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0);
}

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

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

.btn-primary:hover:not(:disabled) {
    background: #0056b3;
}

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

.btn-success:hover:not(:disabled) {
    background: #218838;
}

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

.btn-danger:hover:not(:disabled) {
    background: #c82333;
}

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

.btn-secondary:hover:not(:disabled) {
    background: #5a6268;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    min-width: auto;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.settings-section {
    padding: 2rem;
    background: var(--light-bg);
    border-top: 1px solid #e9ecef;
}

.setting-group {
    margin-bottom: 2rem;
}

.setting-group:last-child {
    margin-bottom: 0;
}

.setting-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--dark-text);
}

.input-group {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.input-group input {
    flex: 1;
    min-width: 200px;
    padding: 0.8rem;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.preset-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.info-section {
    padding: 2rem;
    background: white;
}

.info-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.info-section h4 {
    color: var(--success-color);
    margin: 1.5rem 0 1rem 0;
    font-size: 1.2rem;
}

.info-section ul {
    list-style: none;
    padding-left: 0;
}

.info-section li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.info-section li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.features {
    margin-top: 2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.feature-item {
    background: var(--light-bg);
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    border: 1px solid #e9ecef;
    transition: transform 0.2s ease;
}

.feature-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

footer {
    background: var(--dark-text);
    color: white;
    text-align: center;
    padding: 1.5rem;
    font-size: 0.9rem;
}

small {
    color: var(--secondary-color);
    font-size: 0.85rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        margin: 0;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .digital-clock {
        font-size: 2.5rem;
    }
    
    .button-group {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .input-group input {
        min-width: auto;
    }
    
    .preset-buttons {
        justify-content: center;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    header {
        padding: 1.5rem;
    }
    
    .clock-section {
        padding: 1.5rem;
    }
    
    .controls-section,
    .settings-section,
    .info-section {
        padding: 1.5rem;
    }
    
    .digital-clock {
        font-size: 2rem;
    }
}

/* Animation for clock updates */
.clock-update {
    animation: pulse 0.5s ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Loading animation */
@keyframes loading {
    0%, 80%, 100% { opacity: 0.6; }
    40% { opacity: 1; }
}

.loading {
    animation: loading 1.4s infinite ease-in-out;
}