/**
 * News-Agent Light Theme CSS
 * Standard-Light-Theme für die gesamte Anwendung
 * 
 * @author News-Agent Team
 * @date 2024-01-XX
 * @version 1.0.0
 * @lastModified 2024-01-XX
 */

/* ==========================================================================
   Base Styles & Variables
   ========================================================================== */

:root {
    /* Primary Colors */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;

    /* Gray Colors */
    --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 Colors */
    --success-50: #ecfdf5;
    --success-100: #d1fae5;
    --success-500: #10b981;
    --success-600: #059669;
    --success-700: #047857;

    /* Warning Colors */
    --warning-50: #fffbeb;
    --warning-100: #fef3c7;
    --warning-500: #f59e0b;
    --warning-600: #d97706;
    --warning-700: #b45309;

    /* Error Colors */
    --error-50: #fef2f2;
    --error-100: #fee2e2;
    --error-500: #ef4444;
    --error-600: #dc2626;
    --error-700: #b91c1c;

    /* Typography */
    --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --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 ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ==========================================================================
   Global Styles
   ========================================================================== */

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family-sans);
    line-height: 1.6;
    color: var(--gray-900);
    background-color: var(--gray-50);
}

/* ==========================================================================
   Custom Components
   ========================================================================== */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary {
    background-color: var(--primary-600);
    color: white;
    border-color: var(--primary-600);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-700);
    border-color: var(--primary-700);
}

.btn-primary:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background-color: white;
    color: var(--gray-700);
    border-color: var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-danger {
    background-color: var(--error-600);
    color: white;
    border-color: var(--error-600);
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--error-700);
    border-color: var(--error-700);
}

.btn-success {
    background-color: var(--success-600);
    color: white;
    border-color: var(--success-600);
}

.btn-success:hover:not(:disabled) {
    background-color: var(--success-700);
    border-color: var(--success-700);
}

/* Form Controls */
.form-input {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    background-color: white;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input:disabled {
    background-color: var(--gray-100);
    cursor: not-allowed;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--spacing-xs);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

/* Custom Dropdown */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: white;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    cursor: pointer;
    min-width: 200px;
    justify-content: space-between;
}

.dropdown-toggle:hover {
    border-color: var(--gray-400);
}

.dropdown-toggle.active {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    margin-top: var(--spacing-xs);
    max-height: 300px;
    overflow-y: auto;
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--gray-900);
    text-decoration: none;
    border: none;
    background: none;
    cursor: pointer;
    text-align: left;
    transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--gray-100);
}

.dropdown-item.selected {
    background-color: var(--primary-50);
    color: var(--primary-700);
}

/* Cards */
.card {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    background-color: var(--gray-50);
}

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

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
    background-color: var(--gray-50);
}

/* Badges/Tags */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.badge-primary {
    background-color: var(--primary-100);
    color: var(--primary-800);
}

.badge-success {
    background-color: var(--success-100);
    color: var(--success-700);
}

.badge-warning {
    background-color: var(--warning-100);
    color: var(--warning-700);
}

.badge-error {
    background-color: var(--error-100);
    color: var(--error-700);
}

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

/* Status Indicators */
.status-indicator {
    display: inline-flex;
    align-items: center;
    font-size: 0.875rem;
}

.status-indicator::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: var(--spacing-sm);
}

.status-indicator.status-online::before {
    background-color: var(--success-500);
}

.status-indicator.status-offline::before {
    background-color: var(--gray-400);
}

.status-indicator.status-warning::before {
    background-color: var(--warning-500);
}

.status-indicator.status-error::before {
    background-color: var(--error-500);
}

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

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.table th {
    background-color: var(--gray-50);
    font-weight: 600;
    color: var(--gray-900);
}

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

/* Navigation */
.nav-tabs {
    display: flex;
    border-bottom: 1px solid var(--gray-200);
}

.nav-tab {
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--gray-600);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
}

.nav-tab:hover {
    color: var(--gray-900);
    border-bottom-color: var(--gray-300);
}

.nav-tab.active {
    color: var(--primary-600);
    border-bottom-color: var(--primary-600);
    font-weight: 500;
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
}

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

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* Alert Messages */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid;
    margin-bottom: var(--spacing-md);
}

.alert-info {
    background-color: var(--primary-50);
    border-color: var(--primary-200);
    color: var(--primary-700);
}

.alert-success {
    background-color: var(--success-50);
    border-color: var(--success-200);
    color: var(--success-700);
}

.alert-warning {
    background-color: var(--warning-50);
    border-color: var(--warning-200);
    color: var(--warning-700);
}

.alert-error {
    background-color: var(--error-50);
    border-color: var(--error-200);
    color: var(--error-700);
}

/* Loading Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-200);
    border-top: 2px solid var(--primary-600);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Progress Bar */
.progress {
    width: 100%;
    height: 8px;
    background-color: var(--gray-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary-600);
    transition: width var(--transition-normal);
}

/* Utility Classes */
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

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

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Responsive Design */
@media (max-width: 768px) {
    .modal {
        margin: var(--spacing-md);
        max-width: calc(100vw - 2rem);
    }

    .nav-tabs {
        flex-wrap: wrap;
    }

    .nav-tab {
        padding: var(--spacing-sm) var(--spacing-md);
    }

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

/* Dark Mode Support (für spätere Implementierung) */
@media (prefers-color-scheme: dark) {
    /* Dark mode styles würden hier implementiert werden */
}

/* Print Styles */
@media print {
    .btn, .modal, .dropdown {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
}