/* ============================================
   Stok Takip Sistemi - Modern CSS Design System
   ============================================ */

/* === CSS Variables (Design Tokens) === */
:root {
    /* Colors - Premium Palette */
    --primary-50: #eef2ff;
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;
    --primary-300: #a5b4fc;
    --primary-400: #818cf8;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-800: #3730a3;
    --primary-900: #312e81;

    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-tertiary: var(--gray-500);
    --border-color: var(--gray-200);
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --border-color: #334155;
}

/* === Base Styles === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background var(--transition-base), color var(--transition-base);
}

/* === Container === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

/* === Header === */
.header {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-800) 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-2xl);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-icon {
    font-size: 2.5rem;
}

.logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
}

/* === Theme Toggle === */
.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: 1.25rem;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

/* === Card === */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    margin-bottom: var(--spacing-xl);
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
}

.card:hover {
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* === Form === */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input {
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

/* === Buttons === */
.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: inherit;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-800) 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-success:hover:not(:disabled) {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-danger:hover:not(:disabled) {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-300);
    transform: translateY(-2px);
}

.btn-group {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* === Table === */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-primary);
}

.table thead {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    color: white;
}

.table th {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.table td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.table tbody tr {
    transition: all var(--transition-fast);
}

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

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

/* === Search Bar === */
.search-container {
    margin-bottom: var(--spacing-lg);
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* === Toast Notifications === */
.toast {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    color: white;
    font-weight: 600;
    box-shadow: var(--shadow-xl);
    z-index: 1000;
    animation: slideIn var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    max-width: 400px;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.toast-error {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.toast-info {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
}

/* === Action Buttons === */
.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-icon {
    padding: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
}

.btn-icon:hover {
    color: var(--primary-600);
    background: var(--bg-secondary);
    transform: scale(1.1);
}

.btn-icon.delete:hover {
    color: var(--error);
}

/* === Empty State === */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-tertiary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

/* === Loading Spinner === */
.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-600);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: var(--spacing-xl) auto;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* === Responsive Design === */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.5rem;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .btn-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .table-container {
        font-size: 0.875rem;
    }

    .table th,
    .table td {
        padding: var(--spacing-sm);
    }

    .toast {
        right: var(--spacing-md);
        left: var(--spacing-md);
        max-width: none;
    }
}

/* === Utility Classes === */
.text-center {
    text-align: center;
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.hidden {
    display: none !important;
}