/* ===========================================
   Easter Date Calculator - CSS Styles
   Pure CSS for LAMP server deployment
   =========================================== */

/* CSS Variables */
:root {
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-background: #0f0f23;
    --color-surface: #1a1a2e;
    --color-surface-light: #252542;
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-accent: #f59e0b;
    --color-success: #10b981;
    --color-past: #64748b;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--color-background) 0%, #1a1a3e 50%, var(--color-background) 100%);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 2.5rem;
    padding: 2rem 0;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    text-wrap: balance;
}

.subtitle {
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

/* Year Selector */
.year-selector {
    background: var(--color-surface);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    text-align: center;
}

.selector-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.selector-form label {
    font-weight: 600;
    color: var(--color-text);
}

.form-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-surface-light);
    border: 1px solid var(--color-primary);
    border-radius: var(--border-radius-sm);
    color: var(--color-primary-light);
    font-size: 1.25rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.nav-btn:hover:not(.disabled) {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.nav-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    border-color: var(--color-past);
    color: var(--color-past);
}

select {
    appearance: none;
    background: var(--color-surface-light) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23818cf8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E") no-repeat right 12px center;
    border: 1px solid var(--color-primary);
    border-radius: var(--border-radius-sm);
    color: var(--color-text);
    font-size: 1.125rem;
    font-weight: 600;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 120px;
}

select:hover, select:focus {
    border-color: var(--color-primary-light);
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.submit-btn {
    background: var(--color-primary);
    border: none;
    border-radius: var(--border-radius-sm);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.submit-btn:hover {
    background: var(--color-primary-dark);
}

.today-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--color-primary-light);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s ease;
}

.today-link:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

/* Featured Card */
.featured-card {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.featured-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    pointer-events: none;
}

.featured-year {
    font-size: 1.25rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.featured-date {
    font-size: 2.25rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.25rem;
    text-wrap: balance;
}

.featured-day {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1rem;
}

.status-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
}

.status-today {
    background: var(--color-accent);
    color: #1a1a2e;
}

.status-past {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.status-future {
    background: rgba(16, 185, 129, 0.3);
    color: #6ee7b7;
}

/* Range Section */
.range-section {
    background: var(--color-surface);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.range-section h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: var(--color-text);
    text-align: center;
}

.table-container {
    overflow-x: auto;
}

.easter-table {
    width: 100%;
    border-collapse: collapse;
}

.easter-table th,
.easter-table td {
    padding: 0.875rem 1rem;
    text-align: left;
}

.easter-table th {
    background: var(--color-surface-light);
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--color-primary);
}

.easter-table th:first-child {
    border-radius: var(--border-radius-sm) 0 0 0;
}

.easter-table th:last-child {
    border-radius: 0 var(--border-radius-sm) 0 0;
}

.easter-table td {
    border-bottom: 1px solid var(--color-surface-light);
}

.easter-table tr:last-child td {
    border-bottom: none;
}

.easter-table tr:hover {
    background: var(--color-surface-light);
}

.easter-table tr.selected-row {
    background: rgba(99, 102, 241, 0.15);
}

.easter-table tr.selected-row:hover {
    background: rgba(99, 102, 241, 0.2);
}

.year-cell a {
    color: var(--color-primary-light);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.year-cell a:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

.date-cell {
    color: var(--color-text);
}

.status-cell {
    text-align: right;
}

.table-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-today {
    background: var(--color-accent);
    color: #1a1a2e;
}

.badge-past {
    background: var(--color-surface-light);
    color: var(--color-text-muted);
}

.badge-future {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-success);
}

/* Info Section */
.info-section {
    margin-bottom: 2rem;
}

.info-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: var(--color-text);
    text-align: center;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.info-card {
    background: var(--color-surface);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.info-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary-light);
    margin-bottom: 0.75rem;
}

.info-card p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    line-height: 1.7;
}

/* Footer */
.footer {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--color-surface-light);
    color: var(--color-text-muted);
}

.footer p {
    margin-bottom: 0.25rem;
}

.footer-note {
    font-size: 0.75rem;
    color: var(--color-past);
}

/* Responsive Design */
@media (max-width: 640px) {
    .container {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 1.875rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .featured-card {
        padding: 1.5rem;
    }
    
    .featured-date {
        font-size: 1.75rem;
    }
    
    .easter-table th,
    .easter-table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.875rem;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .year-selector,
    .nav-btn,
    .today-link {
        display: none;
    }
    
    .featured-card {
        background: #f0f0f0;
        color: black;
    }
    
    .featured-date,
    .featured-day,
    .featured-year {
        color: black;
    }
}