/*
 * =====================================================
 * CHI ATTENDANCE - DESIGN SYSTEM
 * Modern Glassmorphism + Enterprise Components
 * =====================================================
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* =====================================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ===================================================== */
:root {
    /* PRIMARY PALETTE */
    --color-primary: #6366F1;
    --color-primary-hover: #4F46E5;
    --color-primary-light: #EEF2FF;
    --color-primary-dark: #3730A3;
    --color-primary-rgb: 99, 102, 241;

    /* SECONDARY */
    --color-secondary: #64748B;
    --color-secondary-hover: #475569;
    --color-secondary-light: #F1F5F9;

    /* ACCENT */
    --color-accent: #22C55E;
    --color-accent-hover: #16A34A;
    --color-accent-light: #DCFCE7;

    /* STATUS COLORS */
    --color-warning: #F59E0B;
    --color-warning-light: #FEF3C7;
    --color-error: #EF4444;
    --color-error-light: #FEE2E2;
    --color-info: #3B82F6;
    --color-info-light: #DBEAFE;

    /* BACKGROUNDS */
    --color-bg: #F8FAFC;
    --color-surface: #FFFFFF;
    --color-surface-hover: #F1F5F9;

    /* DARK THEME (Sidebar/Login Left) */
    --dark-bg: #0F172A;
    --dark-bg-secondary: #1E293B;
    --dark-surface: rgba(255, 255, 255, 0.05);
    --dark-border: rgba(255, 255, 255, 0.1);
    --dark-text: #F1F5F9;
    --dark-text-muted: #94A3B8;

    /* BORDERS */
    --color-border: #E2E8F0;
    --color-border-light: #F1F5F9;

    /* TEXT COLORS */
    --color-text-primary: #0F172A;
    --color-text-secondary: #475569;
    --color-text-muted: #94A3B8;
    --color-text-inverse: #FFFFFF;

    /* GLASSMORPHISM */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    --glass-blur: 16px;

    /* TYPOGRAPHY */
    --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;

    /* SPACING (4px base) */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* BORDER RADIUS */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;

    /* SHADOWS */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --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);

    /* TRANSITIONS */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* LAYOUT */
    --sidebar-width: 260px;
    --content-max-width: 1400px;
}

/* =====================================================
   BASE RESET
   ===================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

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

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

img { max-width: 100%; height: auto; }

/* =====================================================
   BUTTON SYSTEM
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 10px 20px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1.5;
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
    outline: none;
}
.btn:focus-visible { box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.3); }

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}
.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.35);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border-color: var(--color-border);
}
.btn-secondary:hover { background: var(--color-surface-hover); }

.btn-success {
    background: var(--color-accent);
    color: var(--color-text-inverse);
}
.btn-success:hover { background: var(--color-accent-hover); }

.btn-danger {
    background: var(--color-error);
    color: var(--color-text-inverse);
}
.btn-danger:hover { background: #DC2626; }

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}
.btn-ghost:hover { background: var(--color-surface-hover); color: var(--color-text-primary); }

.btn-sm { padding: 6px 14px; font-size: var(--font-size-xs); }
.btn-lg { padding: 14px 28px; font-size: var(--font-size-base); }
.btn-block { width: 100%; }

/* =====================================================
   CARD SYSTEM
   ===================================================== */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}
.card:hover { box-shadow: var(--shadow-md); }
.card-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--color-border);
}
.card-body { padding: var(--space-6); }
.card-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
}

/* =====================================================
   FORM SYSTEM
   ===================================================== */
.form-group { margin-bottom: var(--space-5); }
.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}
.form-control {
    width: 100%;
    padding: 11px 16px;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    outline: none;
}
.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(var(--color-primary-rgb), 0.12);
}
.form-control::placeholder { color: var(--color-text-muted); }
.form-control[readonly] { background: var(--color-bg); color: var(--color-text-secondary); }

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 38px;
}

textarea.form-control { min-height: 100px; resize: vertical; }
.form-error { font-size: var(--font-size-sm); color: var(--color-error); margin-top: var(--space-1); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }

/* =====================================================
   TABLE SYSTEM
   ===================================================== */
.table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    background: var(--color-surface);
}
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}
.table th {
    text-align: left;
    padding: 14px 18px;
    background: var(--color-bg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}
.table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: var(--color-surface-hover); }

/* =====================================================
   BADGE SYSTEM
   ===================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    letter-spacing: 0.02em;
}
.badge-primary { background: var(--color-primary-light); color: var(--color-primary); }
.badge-success { background: var(--color-accent-light); color: #16A34A; }
.badge-warning { background: var(--color-warning-light); color: #D97706; }
.badge-danger { background: var(--color-error-light); color: var(--color-error); }
.badge-leave { background: #E0F2FE; color: #0284C7; }
.badge-info { background: var(--color-info-light); color: var(--color-info); }
.badge-secondary { background: var(--color-secondary-light); color: var(--color-secondary); }

/* =====================================================
   ALERT SYSTEM
   ===================================================== */
.alert {
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}
.alert-success { background: var(--color-accent-light); color: #166534; border-left: 4px solid var(--color-accent); }
.alert-error { background: var(--color-error-light); color: #991B1B; border-left: 4px solid var(--color-error); }
.alert-warning { background: var(--color-warning-light); color: #92400E; border-left: 4px solid var(--color-warning); }
.alert-info { background: var(--color-info-light); color: #1E40AF; border-left: 4px solid var(--color-info); }

/* =====================================================
   STAT CARDS
   ===================================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-5);
    margin-bottom: var(--space-6);
}
.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-5) var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    transition: all var(--transition-normal);
}
.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.stat-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}
.stat-icon.primary { background: var(--color-primary-light); color: var(--color-primary); }
.stat-icon.success { background: var(--color-accent-light); color: var(--color-accent); }
.stat-icon.warning { background: var(--color-warning-light); color: var(--color-warning); }
.stat-icon.danger { background: var(--color-error-light); color: var(--color-error); }
.stat-content h4 { font-size: var(--font-size-2xl); font-weight: var(--font-weight-bold); margin: 0; }
.stat-content p { font-size: var(--font-size-sm); color: var(--color-text-muted); margin: 0; }

/* =====================================================
   UTILITY CLASSES
   ===================================================== */
.text-primary { color: var(--color-primary) !important; }
.text-success { color: var(--color-accent) !important; }
.text-danger { color: var(--color-error) !important; }
.text-warning { color: var(--color-warning) !important; }
.text-muted { color: var(--color-text-muted) !important; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.hidden { display: none !important; }

/* =====================================================
   ANIMATIONS
   ===================================================== */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideDown { from { opacity: 0; transform: translateY(-16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }

.animate-fade-in { animation: fadeIn 0.4s ease forwards; }
.animate-slide-up { animation: slideUp 0.4s ease forwards; }
.animate-scale-in { animation: scaleIn 0.3s ease forwards; }

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 768px) {
    .form-row { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr; }
    .hidden-mobile { display: none !important; }
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }
* { scrollbar-width: thin; scrollbar-color: var(--color-border) transparent; }

/* Password field + eye toggle (used globally: admin, register, profile, users) */
.pwd-input-wrap { position: relative; display: block; }
.pwd-input-wrap input { padding-right: 42px; }
.pwd-eye-btn,
.auth-eye-btn {
    position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
    background: none; border: none; color: var(--color-text-muted); cursor: pointer;
    font-size: 0.95rem; padding: 4px; transition: color 0.2s; line-height: 1;
}
.pwd-eye-btn:hover,
.auth-eye-btn:hover { color: var(--color-text-secondary); }