/**
 * Digisat CMS - Ana Stil Dosyası
 * UX/UI Tasarım Sistemi'ne göre hazırlanmıştır
 */

/* ============================================
   CSS VARIABLES (Design Tokens)
   ============================================ */

:root {
    /* Renk Paleti */
    --color-primary: #007dba;
    --color-primary-dark: #005a8a;
    --color-primary-light: #4db8e8;
    
    --color-secondary: #DC3300;
    --color-secondary-dark: #a32800;
    --color-secondary-light: #ff6b35;
    
    /* Nötr Renkler */
    --color-text-primary: #333333;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-border: #e7e7e7;
    --color-border-dark: #cccccc;
    
    /* Arka Plan Renkleri */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #f2f2f2;
    
    /* Durum Renkleri */
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-error: #dc3545;
    --color-info: #17a2b8;
    
    /* Spacing Scale (8-point grid) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms;
    --transition-base: 300ms;
    --transition-slow: 500ms;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    margin: 0;
    padding: 0;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin: 0 0 var(--space-4) 0;
    color: var(--color-text-primary);
}

h1 { font-size: 2.25rem; }      /* 36px */
h2 { font-size: 1.875rem; }     /* 30px */
h3 { font-size: 1.5rem; }       /* 24px */
h4 { font-size: 1.25rem; }      /* 20px */
h5 { font-size: 1.125rem; }     /* 18px */
h6 { font-size: 1rem; }         /* 16px */

p {
    margin: 0 0 var(--space-4) 0;
}

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

a:hover {
    color: var(--color-primary-dark);
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.container-sm { max-width: 640px; }
.container-md { max-width: 768px; }
.container-lg { max-width: 1024px; }

.section {
    padding: var(--space-16) 0;
}

.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

.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-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    gap: var(--space-2);
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--color-secondary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 1.125rem;
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 500;
    color: var(--color-text-primary);
    font-size: 0.875rem;
}

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

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 125, 186, 0.1);
}

.form-input-error,
.form-select-error,
.form-textarea-error {
    border-color: var(--color-error);
}

.form-helper {
    display: block;
    margin-top: var(--space-2);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.form-error {
    display: block;
    margin-top: var(--space-2);
    font-size: 0.875rem;
    color: var(--color-error);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.card-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-border);
}

.card-body {
    padding: var(--space-6);
}

.card-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

.card-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.card-image {
    width: 100%;
    height: auto;
    display: block;
}

/* ============================================
   BADGES & TAGS
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.badge-primary { background: var(--color-primary); color: white; }
.badge-secondary { background: var(--color-secondary); color: white; }
.badge-success { background: var(--color-success); color: white; }
.badge-warning { background: var(--color-warning); color: var(--color-text-primary); }
.badge-error { background: var(--color-error); color: white; }
.badge-info { background: var(--color-info); color: white; }

/* ============================================
   ALERTS
   ============================================ */

.alert {
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    border: 1px solid transparent;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-color: #ffeaa7;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-color: #bee5eb;
}

/* ============================================
   TABLES
   ============================================ */

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

.table th,
.table td {
    padding: var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.table th {
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
}

.table tr:hover {
    background: var(--color-bg-secondary);
}

.table-responsive {
    overflow-x: auto;
}

/* ============================================
   MODAL
   ============================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--space-4);
}

.modal-content {
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.modal-close:hover {
    background: var(--color-bg-tertiary);
}

.modal-body {
    padding: var(--space-6);
}

.modal-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: var(--space-4);
    justify-content: flex-end;
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--space-2);
}

.nav-link {
    padding: var(--space-3) var(--space-4);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: var(--color-bg-secondary);
}

/* ============================================
   BREADCRUMB
   ============================================ */

.breadcrumb {
    display: flex;
    list-style: none;
    margin: 0 0 var(--space-4) 0;
    padding: var(--space-4) 0;
    gap: var(--space-2);
}

.breadcrumb-item {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.breadcrumb-item:not(:last-child)::after {
    content: '/';
    margin-left: var(--space-2);
}

.breadcrumb-item a {
    color: var(--color-text-secondary);
}

.breadcrumb-item a:hover {
    color: var(--color-primary);
}

/* ============================================
   PAGINATION
   ============================================ */

.pagination {
    display: flex;
    list-style: none;
    margin: var(--space-8) 0 0 0;
    padding: 0;
    gap: var(--space-2);
}

.pagination-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition-base);
}

.pagination-item:hover,
.pagination-item.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* ============================================
   UTILITIES
   ============================================ */

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

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.hidden { display: none; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    html { font-size: 14px; }
    
    .grid-cols-3,
    .grid-cols-4 { grid-template-columns: 1fr; }
    
    .grid-cols-2 { grid-template-columns: 1fr; }
    
    .section { padding: var(--space-12) 0; }
    
    .table {
        font-size: 0.875rem;
    }
    
    .table th,
    .table td {
        padding: var(--space-2) var(--space-3);
    }
}

@media (max-width: 480px) {
    .btn {
        width: 100%;
    }
    
    .modal-content {
        margin: var(--space-4);
        max-height: calc(100vh - var(--space-8));
    }
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

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

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

.animate-fadeIn {
    animation: fadeIn var(--transition-base);
}

.animate-slideUp {
    animation: slideUp var(--transition-base);
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--space-2) var(--space-4);
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}