/* Custom CSS for Attendance Management System - Modern Aesthetic */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Primary Palette - Deep Ocean */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --primary-light: #a3bffa;
    
    /* Accent Colors */
    --accent-teal: #38b2ac;
    --accent-coral: #fc8181;
    --accent-amber: #f6ad55;
    --accent-emerald: #48bb78;
    
    /* Status Colors */
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --success-color: #10b981;
    --danger-gradient: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);
    --danger-color: #ef4444;
    --warning-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --warning-color: #f59e0b;
    --info-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --info-color: #06b6d4;
    
    /* Neutral Palette */
    --bg-primary: #f7f8fc;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.95);
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #a0aec0;
    --border-color: rgba(0, 0, 0, 0.08);
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
    
    /* Transitions */
    --transition-fast: all 0.15s ease;
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(118, 75, 162, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(56, 178, 172, 0.05) 0%, transparent 40%);
    pointer-events: none;
    z-index: -1;
}

/* ===== NAVBAR STYLES ===== */
.navbar {
    background: var(--primary-gradient) !important;
    box-shadow: var(--shadow-lg);
    padding: 0.75rem 1rem;
    position: sticky;
    top: 0;
    z-index: 1030;
    backdrop-filter: blur(10px);
}

.navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, rgba(255,255,255,0.1) 0%, transparent 50%, rgba(255,255,255,0.1) 100%);
    pointer-events: none;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-base);
}

.navbar-brand:hover {
    transform: scale(1.02);
}

.navbar-brand i {
    font-size: 1.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.nav-link {
    font-weight: 500;
    padding: 0.6rem 1rem !important;
    border-radius: 0.5rem;
    margin: 0 0.15rem;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.25);
}

.nav-link i {
    font-size: 1.1rem;
}

.dropdown-menu {
    border: none;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-xl);
    padding: 0.5rem;
    margin-top: 0.5rem;
    animation: dropdownFadeIn 0.2s ease;
}

@keyframes dropdownFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-item {
    border-radius: 0.5rem;
    padding: 0.6rem 1rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--bg-primary);
}

/* ===== CARD STYLES ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.3px;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background: transparent;
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
}

/* Dashboard Stats Cards */
.card.bg-primary,
.card.bg-success,
.card.bg-info,
.card.bg-danger,
.card.bg-warning {
    border: none;
    position: relative;
    overflow: hidden;
}

.card.bg-primary {
    background: var(--primary-gradient) !important;
}

.card.bg-success {
    background: var(--success-gradient) !important;
}

.card.bg-info {
    background: var(--info-gradient) !important;
}

.card.bg-danger {
    background: var(--danger-gradient) !important;
}

.card.bg-warning {
    background: var(--warning-gradient) !important;
}

.card.bg-primary::before,
.card.bg-success::before,
.card.bg-info::before,
.card.bg-danger::before,
.card.bg-warning::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 60%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.card.bg-primary .card-body,
.card.bg-success .card-body,
.card.bg-info .card-body,
.card.bg-danger .card-body,
.card.bg-warning .card-body {
    position: relative;
    z-index: 1;
}

.card.bg-primary .card-footer,
.card.bg-success .card-footer,
.card.bg-info .card-footer,
.card.bg-danger .card-footer,
.card.bg-warning .card-footer {
    background: rgba(0, 0, 0, 0.15) !important;
    border-top: none;
}

.card.bg-primary .card-footer a,
.card.bg-success .card-footer a,
.card.bg-info .card-footer a {
    transition: var(--transition-fast);
}

.card.bg-primary .card-footer a:hover,
.card.bg-success .card-footer a:hover,
.card.bg-info .card-footer a:hover {
    letter-spacing: 0.5px;
}

/* ===== BUTTON STYLES ===== */
.btn {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 600;
    padding: 0.65rem 1.25rem;
    border-radius: 0.6rem;
    transition: var(--transition-base);
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-primary:hover {
    background: var(--primary-gradient);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

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

.btn-success:hover {
    background: var(--success-gradient);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

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

.btn-danger:hover {
    background: var(--danger-gradient);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

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

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

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

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    border-radius: 0.5rem;
}

.btn-lg {
    padding: 0.9rem 2rem;
    font-size: 1.1rem;
    border-radius: 0.75rem;
}

/* ===== FORM STYLES ===== */
.form-control,
.form-select {
    font-family: 'Plus Jakarta Sans', sans-serif;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 0.6rem;
    font-size: 0.95rem;
    transition: var(--transition-base);
    background: var(--bg-secondary);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15);
    outline: none;
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-label {
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.form-floating > .form-control,
.form-floating > .form-select {
    height: calc(3.5rem + 4px);
    padding: 1rem;
}

.form-floating > label {
    padding: 1rem;
    color: var(--text-muted);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* ===== TABLE STYLES ===== */
.table {
    font-size: 0.95rem;
}

.table thead th {
    background: var(--bg-primary);
    border-bottom: 2px solid var(--border-color);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    padding: 1rem;
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-color);
}

.table-hover tbody tr {
    transition: var(--transition-fast);
}

.table-hover tbody tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
    background-color: rgba(0, 0, 0, 0.02);
}

/* ===== BADGE STYLES ===== */
.badge {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 600;
    padding: 0.45em 0.85em;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    letter-spacing: 0.3px;
}

.badge.bg-success {
    background: var(--success-gradient) !important;
}

.badge.bg-danger {
    background: var(--danger-gradient) !important;
}

.badge.bg-warning {
    background: var(--warning-gradient) !important;
    color: white !important;
}

.badge.bg-info {
    background: var(--info-gradient) !important;
}

.badge.bg-primary {
    background: var(--primary-gradient) !important;
}

/* ===== ALERT STYLES ===== */
.alert {
    border: none;
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(56, 239, 125, 0.15) 100%);
    color: #047857;
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.15) 0%, rgba(244, 92, 67, 0.15) 100%);
    color: #b91c1c;
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(251, 191, 36, 0.15) 100%);
    color: #92400e;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(0, 242, 254, 0.15) 100%);
    color: #0e7490;
    border-left: 4px solid var(--info-color);
}

/* ===== LIST GROUP STYLES ===== */
.list-group-item {
    border: none;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.25rem;
    transition: var(--transition-fast);
}

.list-group-item:last-child {
    border-bottom: none;
}

.list-group-item:hover {
    background: rgba(102, 126, 234, 0.05);
}

.list-group-item-action {
    color: var(--text-primary);
}

/* ===== FOOTER STYLES ===== */
footer {
    background: #f8fafc !important;
    border-top: 1px solid #e2e8f0;
    color: #64748b;
    padding: 1.25rem 0;
    margin-top: auto;
}

footer p {
    margin: 0;
    font-size: 0.875rem;
    font-weight: 500;
}

/* ===== UTILITY CLASSES ===== */
.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: var(--primary-gradient);
}

.shadow-glow {
    box-shadow: var(--shadow-glow);
}

.rounded-xl {
    border-radius: 1rem;
}

.rounded-2xl {
    border-radius: 1.5rem;
}

/* ===== PAGE HEADER ===== */
.page-header {
    margin-bottom: 2rem;
}

.page-header h2 {
    font-weight: 800;
    font-size: 1.75rem;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.page-header h2 i {
    color: var(--primary-color);
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-top: 0.25rem;
}

/* ===== STAT ICON ANIMATION ===== */
.stat-icon {
    font-size: 3rem;
    opacity: 0.5;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ===== RESPONSIVE STYLES ===== */
@media (max-width: 992px) {
    .navbar-collapse {
        background: rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(10px);
        padding: 1rem;
        border-radius: 0.75rem;
        margin-top: 0.5rem;
    }
}

@media (max-width: 768px) {
    .page-header h2 {
        font-size: 1.5rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .table-responsive {
        font-size: 0.85rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
    }
    
    .stat-icon {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1.1rem;
    }
    
    .nav-link {
        padding: 0.5rem 0.75rem !important;
        font-size: 0.9rem;
    }
    
    .page-header h2 {
        font-size: 1.25rem;
    }
}

/* ===== LOADING SPINNER ===== */
.spinner-border {
    border-color: var(--primary-light);
    border-right-color: var(--primary-color);
}

/* ===== LOGIN PAGE SPECIFIC ===== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: 
        radial-gradient(circle at 30% 70%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(255,255,255,0.15) 0%, transparent 40%);
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 1.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== ANIMATIONS FOR DASHBOARD ===== */
.fade-in {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-up {
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }

/* ===== MODAL STYLES ===== */
.modal-content {
    border: none;
    border-radius: 1rem;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
}

/* ===== PAGINATION ===== */
.pagination .page-link {
    border: none;
    color: var(--text-secondary);
    padding: 0.6rem 1rem;
    margin: 0 0.15rem;
    border-radius: 0.5rem;
    transition: var(--transition-fast);
}

.pagination .page-link:hover {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
}

.pagination .page-item.active .page-link {
    background: var(--primary-gradient);
    color: white;
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h5 {
    color: var(--text-secondary);
    font-weight: 600;
}