/* ==========================================================================
   School Attendance System - Core Design System & Global Styles
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
    /* Color Palette - Vibrant Indigo & Emerald */
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --primary-glow: rgba(79, 70, 229, 0.25);
    
    --success: #10b981;
    --success-hover: #059669;
    --success-light: #ecfdf5;
    --success-glow: rgba(16, 185, 129, 0.25);
    
    --warning: #f59e0b;
    --warning-hover: #d97706;
    --warning-light: #fffbeb;
    --warning-glow: rgba(245, 158, 11, 0.25);
    
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --danger-light: #fef2f2;
    --danger-glow: rgba(239, 68, 68, 0.25);

    --info: #0ea5e9;
    --info-light: #f0f9ff;

    /* Neutrals */
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-surface: #f1f5f9;
    --border-color: #e2e8f0;
    --border-subtle: #edf2f7;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;

    /* Shadows & Glassmorphism */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    --shadow-glow: 0 0 25px rgba(79, 70, 229, 0.35);

    /* Typography */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Layout & Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bg-main: #0b0f19;
    --bg-card: #111827;
    --bg-surface: #1e293b;
    --border-color: #1f293d;
    --border-subtle: #172033;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --primary-light: rgba(79, 70, 229, 0.15);
    --success-light: rgba(16, 185, 129, 0.15);
    --warning-light: rgba(245, 158, 11, 0.15);
    --danger-light: rgba(239, 68, 68, 0.15);
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.25;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-hover);
}

/* Button Component */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px var(--primary-glow);
    color: #fff;
}

.btn-success {
    background: var(--success);
    color: #ffffff;
    box-shadow: 0 4px 12px var(--success-glow);
}

.btn-success:hover {
    background: var(--success-hover);
    color: #fff;
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: var(--bg-surface);
    border-color: var(--text-muted);
}

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

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

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

/* Status Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-on-time {
    background: var(--success-light);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-late {
    background: var(--warning-light);
    color: var(--warning-hover);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-undertime {
    background: #ffedd5;
    color: #c2410c;
    border: 1px solid rgba(194, 65, 12, 0.3);
}

.badge-in {
    background: var(--primary-light);
    color: var(--primary);
    border: 1px solid rgba(79, 70, 229, 0.3);
}

.badge-out {
    background: #ede9fe;
    color: #7c3aed;
    border: 1px solid rgba(124, 58, 237, 0.3);
}

.badge-none {
    background: var(--bg-surface);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

/* Card Component */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* Form Controls */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.form-control {
    width: 100%;
    padding: 0.65rem 0.875rem;
    font-size: 0.9rem;
    font-family: var(--font-body);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Glassmorphism utility */
.glass-panel {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

[data-theme="dark"] .glass-panel {
    background: rgba(17, 24, 39, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.08);
}