/* ========================================================
   CertifyPro - Modern Design System & CSS Variables
   Dark & Light Mode, Responsive, Animations & Micro-interactions
   ======================================================== */

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

:root {
    /* Light Mode Palette */
    --bg-body: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-alt: #f1f5f9;
    --bg-sidebar: #0f172a;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --border-subtle: #f1f5f9;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;

    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --primary-glow: rgba(37, 99, 235, 0.2);

    --success: #10b981;
    --success-light: #ecfdf5;
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --info: #06b6d4;
    --info-light: #ecfeff;
    --purple: #8b5cf6;
    --purple-light: #f5f3ff;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --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);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-width: 270px;
    --header-height: 70px;
}

[data-theme="dark"] {
    /* Dark Mode Palette */
    --bg-body: #0b0f19;
    --bg-surface: #111827;
    --bg-surface-alt: #1f2937;
    --bg-sidebar: #080c14;
    --bg-card: #131c2e;
    --border-color: #1e293b;
    --border-subtle: #172033;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-inverse: #0f172a;

    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-light: rgba(59, 130, 246, 0.15);
    --primary-glow: rgba(59, 130, 246, 0.35);

    --success-light: rgba(16, 185, 129, 0.15);
    --warning-light: rgba(245, 158, 11, 0.15);
    --danger-light: rgba(239, 68, 68, 0.15);
    --info-light: rgba(6, 182, 212, 0.15);
    --purple-light: rgba(139, 92, 246, 0.15);

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
}

/* ========================================================
   Temel Sıfırlamalar ve Tipografi
   ======================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.5;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease, color 0.3s ease;
}

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

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

/* ========================================================
   Ana Düzen (Layout)
   ======================================================== */
.app-layout {
    display: flex;
    min-height: 100vh;
    width: 100%;
}

/* Kenar Çubuğu (Sidebar) */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    color: #cbd5e1;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 4px 0 15px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.5px;
}

.sidebar-logo i {
    color: var(--primary);
    font-size: 22px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-section-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #64748b;
    padding: 14px 14px 6px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: #94a3b8;
    border-radius: var(--radius-md);
    font-weight: 500;
    margin-bottom: 4px;
    transition: var(--transition);
}

.nav-link i {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.nav-link:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.06);
}

.nav-link.active {
    color: #ffffff;
    background: var(--primary);
    box-shadow: 0 4px 12px var(--primary-glow);
    font-weight: 600;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.2);
}

.user-snippet {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.user-info {
    flex: 1;
    overflow: hidden;
}

.user-name {
    font-size: 13px;
    font-weight: 600;
    color: #ffffff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role-badge {
    font-size: 10px;
    color: #94a3b8;
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    display: inline-block;
}

/* Ana İçerik Alanı */
.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Üst Başlık (Navbar) */
.topbar {
    height: var(--header-height);
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    position: sticky;
    top: 0;
    z-index: 90;
    transition: background-color 0.3s ease;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-primary);
    cursor: pointer;
    padding: 6px;
}

.page-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 15px;
}

.btn-icon:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-light);
}

/* Ana İçerik Konteyneri */
.content-body {
    padding: 28px;
    flex: 1;
}

/* ========================================================
   Kartlar ve İstatistikler
   ======================================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    margin-bottom: 24px;
    transition: var(--transition);
}

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

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-subtle);
}

.card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* İstatistik Izgarası */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 18px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

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

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stat-icon.primary { background: var(--primary-light); color: var(--primary); }
.stat-icon.success { background: var(--success-light); color: var(--success); }
.stat-icon.warning { background: var(--warning-light); color: var(--warning); }
.stat-icon.danger { background: var(--danger-light); color: var(--danger); }
.stat-icon.purple { background: var(--purple-light); color: var(--purple); }

.stat-value {
    font-size: 26px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.1;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 4px;
}

/* ========================================================
   Formlar ve Giriş Elemanları
   ======================================================== */
.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-label .required {
    color: var(--danger);
}

.form-control, .form-select {
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    color: var(--text-primary);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
    outline: none;
    font-family: inherit;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

textarea.form-control {
    min-height: 90px;
    resize: vertical;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
}

/* ========================================================
   Butonlar
   ======================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 18px;
    font-size: 13px;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    color: #ffffff;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-secondary {
    background: var(--bg-surface-alt);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-secondary:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

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

.btn-success:hover {
    background: #059669;
    color: #ffffff;
}

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

.btn-danger:hover {
    background: #dc2626;
    color: #ffffff;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: var(--radius-sm);
}

.btn-group {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* ========================================================
   Tablolar
   ======================================================== */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    border-radius: var(--radius-md);
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 13px;
}

.table th {
    background: var(--bg-surface-alt);
    color: var(--text-secondary);
    font-weight: 600;
    padding: 12px 16px;
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

.table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: middle;
}

.table tr:hover td {
    background-color: var(--bg-surface-alt);
}

/* Rozetler (Badges) */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
}

.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-secondary { background: var(--bg-surface-alt); color: var(--text-muted); }
.badge-primary { background: var(--primary-light); color: var(--primary); }

/* ========================================================
   Filtre ve Arama Çubuğu
   ======================================================== */
.filter-bar {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px 20px;
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: flex-end;
}

.filter-item {
    flex: 1;
    min-width: 180px;
}

/* ========================================================
   Sekmeler (Tabs)
   ======================================================== */
.nav-tabs {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
    overflow-x: auto;
}

.tab-link {
    padding: 10px 18px;
    font-weight: 600;
    font-size: 13px;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
}

.tab-link:hover {
    color: var(--primary);
}

.tab-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* ========================================================
   Bildirimler & Flash Mesajları
   ======================================================== */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    animation: slideIn 0.3s ease-out;
}

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }
.toast-warning { border-left: 4px solid var(--warning); }
.toast-info { border-left: 4px solid var(--primary); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ========================================================
   Doğrulama Sayfası (verify.php) İçin Özel Stiller
   ======================================================== */
.verify-container {
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
}

.verify-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.verify-header {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: #ffffff;
    padding: 35px 25px;
    text-align: center;
}

.verify-badge-large {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 700;
    margin-top: 15px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* ========================================================
   Mobil Uyumluluk (Responsive Media Queries)
   ======================================================== */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

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

    .menu-toggle {
        display: block;
    }

    .content-body {
        padding: 20px 16px;
    }
}

@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .topbar {
        padding: 0 16px;
    }

    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-group {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }
}

/* ========================================================
   Sayfalama (Pagination)
   ======================================================== */
.pagination-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
    padding: 12px 18px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-surface);
}

.pagination {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 4px;
    align-items: center;
}

.pagination .page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.15s ease;
    cursor: pointer;
}

.pagination .page-link:hover {
    background: var(--bg-surface-alt);
    border-color: var(--primary);
    color: var(--primary);
}

.pagination .active .page-link {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    cursor: default;
}

.pagination .disabled .page-link {
    opacity: 0.45;
    cursor: not-allowed;
    background: transparent;
    border-color: var(--border-color);
}