/* Modern CRM Styles - Updated Color Palette */
:root {
    --blue: #5438dc;
    --indigo: #564ab1;
    --purple: #5664d2;
    --red: #ff3d60;
    --orange: #f1734f;
    --yellow: #fcb92c;
    --green: #1cbb8c;
    --teal: #050505;
    --cyan: #4aa3ff;
    --white: #fff;
    --gray: #74788d;
    --gray-dark: #343a40;
    --primary: #252b3b;
    --secondary: #74788d;
    --success: #1cbb8c;
    --info: #4aa3ff;
    --warning: #fcb92c;
    --danger: #ff3d60;
    --light: #eff2f7;
    --dark: #343a40;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--light);
    color: var(--primary);
    line-height: 1.6;
}

/* Sidebar Styles */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 260px;
    height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--indigo) 100%);
    color: var(--white);
    padding: 0;
    z-index: 1000;
    box-shadow: 4px 0 15px rgba(0,0,0,0.1);
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

.sidebar-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--white);
}

.sidebar-header p {
    opacity: 0.8;
    font-size: 0.9rem;
    color: var(--light);
}

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

.nav-item {
    display: block;
    padding: 12px 24px;
    color: rgba(255,255,255,0.9);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255,255,255,0.1);
    color: var(--white);
    border-left-color: var(--warning);
    transform: translateX(4px);
}

.nav-item.active {
    background: rgba(255,255,255,0.15);
    color: var(--white);
    border-left-color: var(--success);
    font-weight: 600;
}

.nav-item i {
    margin-right: 12px;
    width: 18px;
    text-align: center;
}

/* Main Content */
.main-content {
    margin-left: 260px;
    min-height: 100vh;
    background-color: var(--light);
}

/* Header */
.header {
    background: var(--white);
    padding: 16px 32px;
    border-bottom: 1px solid #e2e8f0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title {
    flex: 1;
}

.header-title h1 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.header-title p {
    color: var(--gray);
    font-size: 0.95rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn {
    padding: 8px 16px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 500;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--blue), var(--indigo));
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(84, 56, 220, 0.4);
}

.btn-secondary {
    background: var(--light);
    color: var(--gray);
    border: 1px solid #e2e8f0;
}

.btn-secondary:hover {
    background: #e2e8f0;
}

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

.btn-danger:hover {
    background: #e6345a;
}

/* Content Area */
.content {
    padding: 32px;
}

/* Cards */
.card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border: 1px solid #e2e8f0;
    overflow: hidden;
}

.card-header {
    padding: 24px 24px 0;
    border-bottom: 1px solid #f1f5f9;
}

.card-body {
    padding: 24px;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
}

.card-subtitle {
    color: var(--gray);
    font-size: 0.9rem;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--white);
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border: 1px solid #e2e8f0;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--blue), var(--purple));
}

.stat-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.stat-info {
    flex: 1;
}

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.stat-info p {
    color: var(--gray);
    font-size: 0.9rem;
    font-weight: 500;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.stat-icon.blue { 
    background: linear-gradient(135deg, var(--blue), var(--indigo)); 
    color: var(--white); 
}
.stat-icon.green { 
    background: linear-gradient(135deg, var(--success), #16a085); 
    color: var(--white); 
}
.stat-icon.purple { 
    background: linear-gradient(135deg, var(--purple), var(--indigo)); 
    color: var(--white); 
}
.stat-icon.orange { 
    background: linear-gradient(135deg, var(--warning), var(--orange)); 
    color: var(--white); 
}

/* Form Styles */
.form-section {
    margin-bottom: 32px;
}

.form-section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--light);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--dark);
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.form-label.required::after {
    content: ' *';
    color: var(--danger);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    background: var(--white);
    color: var(--primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(84, 56, 220, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

/* Table Styles */
.table-container {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border: 1px solid #e2e8f0;
}

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

.table th {
    background: var(--light);
    padding: 16px;
    text-align: left;
    font-weight: 600;
    color: var(--dark);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid #e5e7eb;
}

.table td {
    padding: 16px;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
    color: var(--primary);
}

.table tr:hover {
    background: #f9fafb;
}

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

/* Status Badge */
.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-aktif {
    background: rgba(28, 187, 140, 0.1);
    color: var(--success);
}

.status-pasif {
    background: rgba(116, 120, 141, 0.1);
    color: var(--gray);
}

.status-beklemede {
    background: rgba(252, 185, 44, 0.1);
    color: var(--warning);
}

/* Search and Filter */
.search-filter {
    background: var(--white);
    padding: 24px;
    border-radius: 12px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border: 1px solid #e2e8f0;
}

.search-filter-row {
    display: flex;
    gap: 16px;
    align-items: end;
}

.search-input {
    flex: 1;
    position: relative;
}

.search-input input {
    width: 100%;
    padding: 12px 16px 12px 48px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.95rem;
}

.search-input i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 8px;
}

.action-btn {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.action-btn.view {
    background: rgba(84, 56, 220, 0.1);
    color: var(--blue);
}

.action-btn.edit {
    background: rgba(28, 187, 140, 0.1);
    color: var(--success);
}

.action-btn.delete {
    background: rgba(255, 61, 96, 0.1);
    color: var(--danger);
}

.action-btn:hover {
    transform: scale(1.1);
}

/* Type Indicator */
.type-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 12px;
}

.type-music { background: var(--blue); }
.type-ballet { background: var(--purple); }

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--indigo) 100%);
    padding: 20px;
}

.login-card {
    background: var(--white);
    padding: 48px 40px;
    border-radius: 16px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--blue), var(--indigo));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.login-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.login-header p {
    color: var(--gray);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content {
        padding: 20px;
    }
    
    .header {
        padding: 16px 20px;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .search-filter-row {
        flex-direction: column;
        align-items: stretch;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

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

.fade-in {
    animation: fadeInUp 0.5s ease-out;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-4 { margin-top: 1rem; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: 1rem; }
.hidden { display: none; }