/* ============================================
   Grukul LMS Admin Theme - Custom Styles
   Unique Dark Theme with Glassmorphism
   ============================================ */

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --dark-bg: #0f172a;
    --dark-card: #1e293b;
    --dark-border: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
}

/* ========== Login Page Styles ========== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    top: -250px;
    right: -250px;
    animation: float 20s infinite ease-in-out;
}

.login-container::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    bottom: -200px;
    left: -200px;
    animation: float 15s infinite ease-in-out reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(30px, -30px) rotate(180deg); }
}

.login-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    width: 100%;
    max-width: 450px;
    position: relative;
    z-index: 1;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-container {
    text-align: center;
    margin-bottom: 30px;
}

.logo-container img {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.2);
    padding: 15px;
    margin-bottom: 15px;
}

.login-title {
    font-size: 32px;
    font-weight: 700;
    color: white;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.login-subtitle {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

.form-group {
    margin-bottom: 25px;
}

/* Scope form-control light theme to login only - dashboard uses dark text on light bg */
.lms-login-container .form-control {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    padding: 12px 20px;
    color: white;
    font-size: 15px;
    transition: all 0.3s ease;
}

.lms-login-container .form-control::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.lms-login-container .form-control:focus {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    color: white;
    box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.25);
}

.input-icon {
    position: relative;
}

.input-icon i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: rgba(255, 255, 255, 0.7);
}

.input-icon .form-control {
    padding-left: 45px;
}

.btn-login {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 12px;
    padding: 12px;
    font-size: 16px;
    font-weight: 600;
    color: white;
    width: 100%;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

/* ========== Dashboard Styles ========== */
.sidebar {
    background: var(--dark-bg);
    min-height: 100vh;
    width: 260px;
    position: fixed;
    left: 0;
    top: 0;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.sidebar-header {
    padding: 25px 20px;
    border-bottom: 1px solid var(--dark-border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-logo {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 20px;
}

.sidebar-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-nav {
    padding: 20px 0;
}

.nav-item {
    margin: 5px 15px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.3s ease;
    font-size: 15px;
}

.nav-link:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    transform: translateX(5px);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.nav-link i {
    font-size: 18px;
    width: 20px;
}

.main-content {
    margin-left: 260px;
    min-height: 100vh;
    background: #f8f9fa;
    transition: all 0.3s ease;
}

.topbar {
    background: white;
    padding: 20px 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 999;
}

.page-title {
    font-size: 24px;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.notification-btn {
    position: relative;
    background: none;
    border: none;
    font-size: 20px;
    color: #64748b;
    cursor: pointer;
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    width: 8px;
    height: 8px;
    background: var(--danger);
    border-radius: 50%;
    border: 2px solid white;
}

.content-area {
    padding: 30px;
}

/* ========== Stats Cards ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 15px;
}

.stat-icon.primary { background: rgba(99, 102, 241, 0.1); color: var(--primary-color); }
.stat-icon.success { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.stat-icon.warning { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.stat-icon.danger { background: rgba(239, 68, 68, 0.1); color: var(--danger); }

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 5px;
}

.stat-label {
    color: #64748b;
    font-size: 14px;
    margin-bottom: 10px;
}

.stat-change {
    font-size: 13px;
    font-weight: 600;
}

.stat-change.positive { color: var(--success); }
.stat-change.negative { color: var(--danger); }

/* ========== Data Table ========== */
.data-card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.table {
    margin-bottom: 0;
}

.table thead th {
    border-bottom: 2px solid #e2e8f0;
    color: #64748b;
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 15px;
}

.table tbody td {
    padding: 15px;
    vertical-align: middle;
    border-bottom: 1px solid #f1f5f9;
    color: #334155;
}

.table tbody tr:hover {
    background: #f8fafc;
}

.badge {
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.badge-warning { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.badge-danger { background: rgba(239, 68, 68, 0.1); color: var(--danger); }
.badge-info { background: rgba(59, 130, 246, 0.1); color: var(--info); }
.badge-primary { background: rgba(99, 102, 241, 0.1); color: var(--primary-color); }

/* ========== Buttons ========== */
.btn-action {
    padding: 8px 15px;
    border-radius: 8px;
    border: none;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-action.btn-edit {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

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

.btn-action.btn-delete {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

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

.btn-primary-custom {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
    color: white;
}

/* ========== User Avatar ========== */
.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
    font-size: 14px;
}

.avatar-gradient-1 { background: linear-gradient(135deg, #667eea, #764ba2); }
.avatar-gradient-2 { background: linear-gradient(135deg, #f093fb, #f5576c); }
.avatar-gradient-3 { background: linear-gradient(135deg, #4facfe, #00f2fe); }
.avatar-gradient-4 { background: linear-gradient(135deg, #43e97b, #38f9d7); }

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .main-content {
        margin-left: 0;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== Animations ========== */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ========== Search Box ========== */
.search-box {
    position: relative;
    margin-bottom: 25px;
}

.search-box input {
    padding-left: 45px;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
}

.search-box i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
}