/*
 * Kaşif Ders Dağıtım SaaS - Ana Stil Dosyası
 * Renk Teması: Kırmızı (#E63946), Gri (#6C757D), Turuncu (#F77F00)
 */

:root {
    /* Renk paleti */
    --color-primary: #E63946;      /* Kırmızı - Ana renk */
    --color-primary-dark: #C5303A;
    --color-primary-light: #FF4D5A;

    --color-secondary: #6C757D;    /* Gri - İkincil renk */
    --color-secondary-dark: #5A6268;
    --color-secondary-light: #868E96;

    --color-accent: #F77F00;       /* Turuncu - Vurgu rengi (Kaşif logosu) */
    --color-accent-dark: #D96F00;
    --color-accent-light: #FF9F33;

    --color-success: #06D6A0;
    --color-warning: #FFA500;
    --color-danger: #DC3545;
    --color-info: #17A2B8;

    --color-dark: #343A40;
    --color-light: #F8F9FA;
    --color-white: #FFFFFF;

    /* Gri tonları */
    --gray-100: #F8F9FA;
    --gray-200: #E9ECEF;
    --gray-300: #DEE2E6;
    --gray-400: #CED4DA;
    --gray-500: #ADB5BD;
    --gray-600: #6C757D;
    --gray-700: #495057;
    --gray-800: #343A40;
    --gray-900: #212529;

    /* Typography */
    --font-family-base: 'Segoe UI', 'Roboto', 'Arial', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Border radius */
    --border-radius-sm: 0.25rem;
    --border-radius: 0.375rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 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);

    /* Transitions */
    --transition-base: all 0.3s ease;
}

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

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    color: var(--gray-900);
    background-color: var(--gray-100);
    line-height: 1.6;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(-1 * var(--spacing-md));
}

.col {
    flex: 1;
    padding: var(--spacing-md);
}

.col-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
.col-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
.col-3 { flex: 0 0 25%; max-width: 25%; }
.col-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
.col-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
.col-6 { flex: 0 0 50%; max-width: 50%; }
.col-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
.col-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
.col-9 { flex: 0 0 75%; max-width: 75%; }
.col-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
.col-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
.col-12 { flex: 0 0 100%; max-width: 100%; }

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition-base);
    line-height: 1.5;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--color-secondary-dark);
}

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

.btn-accent:hover {
    background-color: var(--color-accent-dark);
}

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

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

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

/* Cards */
.card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition-base);
}

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

.card-header {
    padding: var(--spacing-lg);
    background-color: var(--gray-100);
    border-bottom: 1px solid var(--gray-300);
    font-weight: 600;
    color: var(--gray-800);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-lg);
    background-color: var(--gray-100);
    border-top: 1px solid var(--gray-300);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--gray-700);
}

.form-control {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--gray-900);
    background-color: var(--color-white);
    border: 1px solid var(--gray-400);
    border-radius: var(--border-radius);
    transition: var(--transition-base);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.1);
}

.form-control.is-invalid {
    border-color: var(--color-danger);
}

.invalid-feedback {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-danger);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-white);
}

.table thead th {
    padding: var(--spacing-md);
    background-color: var(--gray-100);
    border-bottom: 2px solid var(--gray-300);
    font-weight: 600;
    text-align: left;
    color: var(--gray-800);
}

.table tbody td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
}

.table tbody tr:hover {
    background-color: var(--gray-50);
}

.table-striped tbody tr:nth-child(odd) {
    background-color: var(--gray-100);
}

/* Alerts */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.alert-success {
    background-color: #D1F2EB;
    border-left: 4px solid var(--color-success);
    color: #0C5A4B;
}

.alert-danger {
    background-color: #F8D7DA;
    border-left: 4px solid var(--color-danger);
    color: #842029;
}

.alert-warning {
    background-color: #FFF3CD;
    border-left: 4px solid var(--color-warning);
    color: #997404;
}

.alert-info {
    background-color: #D1ECF1;
    border-left: 4px solid var(--color-info);
    color: #0C5460;
}

/* Badge */
.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--border-radius);
    color: var(--color-white);
}

.badge-primary { background-color: var(--color-primary); }
.badge-secondary { background-color: var(--color-secondary); }
.badge-accent { background-color: var(--color-accent); }
.badge-success { background-color: var(--color-success); }
.badge-danger { background-color: var(--color-danger); }
.badge-warning { background-color: var(--color-warning); }

/* Utility Classes */
.text-primary { color: var(--color-primary) !important; }
.text-secondary { color: var(--color-secondary) !important; }
.text-accent { color: var(--color-accent) !important; }
.text-success { color: var(--color-success) !important; }
.text-danger { color: var(--color-danger) !important; }
.text-muted { color: var(--gray-500) !important; }

.bg-primary { background-color: var(--color-primary) !important; }
.bg-secondary { background-color: var(--color-secondary) !important; }
.bg-accent { background-color: var(--color-accent) !important; }
.bg-light { background-color: var(--color-light) !important; }
.bg-white { background-color: var(--color-white) !important; }

.text-center { text-align: center !important; }
.text-right { text-align: right !important; }
.text-left { text-align: left !important; }

.mt-1 { margin-top: var(--spacing-sm) !important; }
.mt-2 { margin-top: var(--spacing-md) !important; }
.mt-3 { margin-top: var(--spacing-lg) !important; }
.mt-4 { margin-top: var(--spacing-xl) !important; }

.mb-1 { margin-bottom: var(--spacing-sm) !important; }
.mb-2 { margin-bottom: var(--spacing-md) !important; }
.mb-3 { margin-bottom: var(--spacing-lg) !important; }
.mb-4 { margin-bottom: var(--spacing-xl) !important; }

.p-1 { padding: var(--spacing-sm) !important; }
.p-2 { padding: var(--spacing-md) !important; }
.p-3 { padding: var(--spacing-lg) !important; }
.p-4 { padding: var(--spacing-xl) !important; }

.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-inline-block { display: inline-block !important; }

/* Admin Sidebar - Modern Design */
.sidebar {
    width: 260px;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: linear-gradient(180deg, #1F2937 0%, #111827 100%);
    color: white;
    overflow-y: auto;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
    z-index: 1000;
    transition: all 0.3s ease;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(79, 70, 229, 0.1);
}

.sidebar-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #4F46E5 0%, #818CF8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    padding: 1rem 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.5rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
    position: relative;
}

.nav-item:hover {
    background: rgba(79, 70, 229, 0.1);
    color: white;
    border-left-color: var(--color-primary-light);
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(79, 70, 229, 0.2) 0%, transparent 100%);
    color: white;
    border-left-color: var(--color-primary);
    font-weight: 600;
}

.nav-item.active .nav-icon {
    transform: scale(1.1);
}

.nav-icon {
    font-size: 1.25rem;
    margin-right: 0.875rem;
    width: 24px;
    text-align: center;
    transition: transform 0.2s ease;
}

.sidebar-footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Main Content Area */
.main-content {
    margin-left: 260px;
    min-height: 100vh;
    background: linear-gradient(135deg, #F3F4F6 0%, #E5E7EB 100%);
}

.header {
    background: white;
    padding: 1rem 2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin: 0;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--gray-50);
    border-radius: 2rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.user-menu:hover {
    background: var(--gray-100);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.user-name {
    font-weight: 600;
    color: var(--color-secondary);
}

.user-icon {
    font-size: 1.5rem;
}

/* Page Content */
.page-content {
    padding: 2rem;
}

/* Card - Modern Design */
.card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1), 0 2px 6px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.card-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
}

.card-body {
    padding: 2rem;
}

/* Buttons - Modern Design */
.btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 0.875rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.4);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

.btn-success {
    background: linear-gradient(135deg, var(--color-success) 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, var(--color-danger) 0%, #DC2626 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
}

/* Table - Modern Design */
.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.table thead {
    background: linear-gradient(135deg, #F9FAFB 0%, #F3F4F6 100%);
}

.table thead th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-weight: 700;
    color: var(--gray-700);
    border-bottom: 2px solid var(--gray-200);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tbody tr {
    transition: all 0.2s ease;
}

.table tbody tr:hover {
    background: var(--gray-50);
    transform: scale(1.01);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.table tbody td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-600);
}

/* Badge - Modern Design */
.badge {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background: linear-gradient(135deg, #D1FAE5 0%, #A7F3D0 100%);
    color: #065F46;
}

.badge-danger {
    background: linear-gradient(135deg, #FEE2E2 0%, #FECACA 100%);
    color: #991B1B;
}

.badge-warning {
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    color: #92400E;
}

.badge-info {
    background: linear-gradient(135deg, #DBEAFE 0%, #BFDBFE 100%);
    color: #1E40AF;
}

.badge-primary {
    background: linear-gradient(135deg, #E0E7FF 0%, #C7D2FE 100%);
    color: #3730A3;
}

.badge-secondary {
    background: linear-gradient(135deg, #F3F4F6 0%, #E5E7EB 100%);
    color: #374151;
}

/* Modal - Modern Design */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

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

.modal-content {
    background: white;
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    animation: slideUp 0.3s ease;
}

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

.modal-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 16px 16px 0 0;
}

.modal-header h3 {
    margin: 0;
    font-weight: 700;
}

.modal-body {
    padding: 2rem;
}

.close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

/* Form Elements - Modern Design */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-size: 0.9375rem;
    transition: all 0.2s ease;
    background: white;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Stats Card - Modern Design */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border-left: 4px solid var(--color-primary);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

/* Alert - Modern Design */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border-left: 4px solid;
    display: flex;
    align-items: start;
    gap: 1rem;
}

.alert-success {
    background: linear-gradient(135deg, #D1FAE5 0%, #A7F3D0 100%);
    border-color: var(--color-success);
    color: #065F46;
}

.alert-danger {
    background: linear-gradient(135deg, #FEE2E2 0%, #FECACA 100%);
    border-color: var(--color-danger);
    color: #991B1B;
}

.alert-warning {
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border-color: var(--color-warning);
    color: #92400E;
}

.alert-info {
    background: linear-gradient(135deg, #DBEAFE 0%, #BFDBFE 100%);
    border-color: var(--color-info);
    color: #1E40AF;
}