@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* Tasarım Sistemi & CSS Değişkenleri */
:root {
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Açık Tema Değişkenleri (Varsayılan) */
    --bg-app: #f4f6fa;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-sidebar: #ffffff;
    --border-color: rgba(226, 232, 240, 0.8);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 40px -15px rgba(99, 102, 241, 0.1);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --glass-blur: 16px;
}

[data-theme="dark"] {
    /* Koyu Tema Değişkenleri */
    --bg-app: #090a0f;
    --bg-card: rgba(17, 18, 28, 0.75);
    --bg-sidebar: #11121d;
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
}

/* Genel Sıfırlama ve Temel Kurallar */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-app);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* Scrollbar Özelleştirme */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Uygulama Düzeni (Sidebar + Main Content) */
.app-container {
    display: flex;
    width: 100%;
    min-height: 100vh;
    position: relative;
}

/* Yan Menü (Sidebar) */
.sidebar {
    width: 280px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
}

.brand-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
    width: 100%;
}

.app-logo {
    max-height: 75px;
    max-width: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.app-logo:hover {
    transform: scale(1.05);
}

.logo-light-theme {
    display: block;
}
.logo-dark-theme {
    display: none;
}

[data-theme="dark"] .logo-light-theme {
    display: none;
}
[data-theme="dark"] .logo-dark-theme {
    display: block;
}

.nav-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-item i {
    font-size: 1.25rem;
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: rgba(99, 102, 241, 0.05);
}

.nav-item.active {
    color: #ffffff;
    background: var(--primary-gradient);
    box-shadow: var(--shadow-lg);
}

.sidebar-footer {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.theme-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 500;
    font-family: var(--font-body);
}

.theme-toggle-btn:hover {
    background-color: rgba(99, 102, 241, 0.05);
}

/* Ana İçerik Alanı */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 2.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Sayfa Başlığı ve Üst Bar */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.page-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Sekmeler / Tab İçerikleri */
.tab-content {
    display: none;
    animation: fadeIn 0.4s ease-out forwards;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Cam Efektli Kartlar (Glassmorphic Cards) */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

/* İstatistik Kartları Grid Yapısı */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.75rem;
    position: relative;
    overflow: hidden;
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: #fff;
}

.stat-icon.total {
    background: var(--primary-gradient);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

.stat-icon.pending {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3);
}

.stat-icon.completed {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
}

.stat-icon.overdue {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    box-shadow: 0 8px 20px rgba(239, 68, 68, 0.3);
}

.stat-details {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: 0.25rem;
}

/* Filtre Paneli */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
}

.search-input-wrapper {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-input-wrapper i {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-input {
    width: 100%;
    padding: 0.85rem 1.25rem 0.85rem 3rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.filters-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.select-filter {
    padding: 0.85rem 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--bg-sidebar);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    cursor: pointer;
    min-width: 150px;
}

.select-filter:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Buton Stilleri */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.5rem;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

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

.btn-secondary:hover {
    background-color: var(--text-secondary);
    color: #ffffff;
}

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

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
}

/* Tablolar */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    margin-top: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.modern-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

.modern-table th {
    background-color: rgba(99, 102, 241, 0.05);
    padding: 1.25rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.modern-table td {
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

.modern-table tbody tr:hover {
    background-color: rgba(99, 102, 241, 0.02);
}

/* Badge Stilleri (Durum Etiketleri) */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.75rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    gap: 0.35rem;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}

.badge.status-nakista {
    background-color: var(--warning-bg);
    color: var(--warning);
}

.badge.status-nakista .badge-dot {
    background-color: var(--warning);
}

.badge.status-gerigeldi {
    background-color: var(--success-bg);
    color: var(--success);
}

.badge.status-gerigeldi .badge-dot {
    background-color: var(--success);
}

.badge.status-gecikti {
    background-color: var(--danger-bg);
    color: var(--danger);
}

.badge.status-gecikti .badge-dot {
    background-color: var(--danger);
}

/* Formlar ve Girdiler */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-input, .form-textarea, .form-select {
    width: 100%;
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--bg-sidebar);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Tanımlamalar Paneli Düzeni (Split layout) */
.settings-categories-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

@media (max-width: 1024px) {
    .settings-categories-grid {
        grid-template-columns: 1fr;
        gap: 1.75rem;
    }
}

.list-group {
    list-style: none;
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.list-group-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background-color: rgba(99, 102, 241, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

/* Nakışçı Portalı Arayüzü */
.portal-selection {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
    gap: 1.5rem;
}

.portal-avatar-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 2rem;
    width: 100%;
}

.portal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem 2rem;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    min-width: 180px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.portal-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.portal-card-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 1.5rem;
}

.portal-card-title {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.portal-active-view {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

/* Bildirim Kutusu (Toast / Modal) */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--bg-sidebar);
    border-left: 4px solid var(--primary-color);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 1000;
    transform: translateY(150%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast.show {
    transform: translateY(0);
}

.toast.success {
    border-left-color: var(--success);
}

.toast.danger {
    border-left-color: var(--danger);
}

/* Responsive Tasarım Ayarları (Küçük Ekranlar) */
@media (max-width: 768px) {
    .sidebar {
        width: 70px;
        padding: 2rem 0.5rem;
        align-items: center;
    }
    
    .brand-name {
        display: none;
    }
    
    .nav-item span {
        display: none;
    }
    
    .nav-item {
        justify-content: center;
        padding: 1rem;
    }
    
    .main-content {
        margin-left: 70px;
        padding: 1.5rem;
    }
    
    .theme-toggle-btn span {
        display: none;
    }
    
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }
}

/* Giriş Ekranı (Login Screen) Stilleri */
.login-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-app);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.1) 0px, transparent 50%);
}

.login-box {
    width: 100%;
    max-width: 450px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 3rem 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    background-color: var(--bg-card);
}

.login-logo {
    width: 64px;
    height: 64px;
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 2rem;
    font-weight: 800;
    font-family: var(--font-heading);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.35);
    margin-bottom: 1.5rem;
}

.login-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    letter-spacing: -0.5px;
}

.login-subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-weight: 500;
}

.login-tabs {
    display: flex;
    width: 100%;
    background-color: rgba(99, 102, 241, 0.05);
    padding: 0.35rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.login-tab {
    flex: 1;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

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

.login-tab.active {
    background-color: var(--bg-sidebar);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.login-form {
    width: 100%;
}

/* Dashboard Grid Layout (Split-Panel) */
.dashboard-grid-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 1024px) {
    .dashboard-grid-layout {
        grid-template-columns: 1fr;
    }
}

#dashboard-balance-table tr {
    cursor: pointer;
    transition: background-color 0.2s, border-left-color 0.2s;
}

#dashboard-balance-table tr:hover {
    background-color: rgba(99, 102, 241, 0.05) !important;
}

#dashboard-balance-table tr.selected {
    background-color: rgba(99, 102, 241, 0.1) !important;
    border-left: 4px solid var(--primary-color);
}