/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color palette */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    
    --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-50: #f0fdf4;
    --success-500: #22c55e;
    --success-600: #16a34a;
    
    --warning-50: #fffbeb;
    --warning-500: #f59e0b;
    --warning-600: #d97706;
    
    --error-50: #fef2f2;
    --error-500: #ef4444;
    --error-600: #dc2626;
    
    /* Theme colors - Light mode (matching pegboard) */
    --bg: #f7f9fc;
    --fg: #0b1220;
    --muted: #667085;
    --panel: #ffffff;
    --panel-border: #e5e7eb;
    --accent: #3b82f6;
    --good: #16a34a;
    --warn: #ea580c;
    --bad: #dc2626;
    --shadow: 0 6px 14px rgba(8, 15, 35, 0.08);
    
    /* Semantic colors */
    --primary-color: var(--accent);
    --primary-dark: #2563eb;
    --primary-rgb: 59, 130, 246;
    --secondary-color: var(--gray-500);
    --success-color: var(--good);
    --warning-color: var(--warn);
    --danger-color: var(--bad);
    
    /* Background colors */
    --background-primary: var(--bg);
    --background-secondary: var(--gray-50);
    --card-bg: var(--panel);
    --input-bg: var(--panel);
    
    /* Text colors */
    --text-primary: var(--fg);
    --text-secondary: var(--muted);
    --text-muted: var(--gray-400);
    
    /* Border colors */
    --border-color: var(--panel-border);
    --border-light: var(--gray-100);
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    
    /* Typography */
    --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Monaco, Inconsolata, 'Roboto Mono', monospace;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;
}

body {
    font-family: var(--font-sans);
    background-color: var(--background-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: var(--spacing-4);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    background: none;
    font-family: inherit;
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--gray-100);
    border-color: var(--gray-400);
}

.btn-secondary:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 1px;
}

.btn-xs {
    padding: 4px 8px;
    font-size: 0.7rem;
    min-height: 24px;
}

[data-theme="dark"] .btn-secondary {
    background: var(--gray-700);
    color: var(--gray-100);
    border-color: var(--gray-500);
}

[data-theme="dark"] .btn-secondary:hover:not(:disabled) {
    background: var(--gray-600);
    border-color: var(--gray-400);
    color: #fff;
}

[data-theme="dark"] .btn-secondary:focus {
    outline: 2px solid var(--primary-600);
    outline-offset: 1px;
}

[data-theme="dark"] .btn-success {
    background-color: var(--success-600);
    color: white;
    border-color: var(--success-600);
}

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

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

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

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

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

.btn-sm {
    padding: var(--spacing-1) var(--spacing-3);
    font-size: 0.75rem;
}

.btn-xs {
    padding: 4px 8px;
    font-size: 0.7rem;
    min-height: 24px;
}

.btn-lg {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: 1rem;
}

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

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

[data-theme="dark"] .btn-ghost:hover {
    background: var(--gray-800);
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.btn-icon svg {
    width: 16px;
    height: 16px;
    pointer-events: none;
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-4);
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-2);
    color: var(--gray-700);
}

.form-input {
    display: block;
    width: 100%;
    padding: var(--spacing-3);
    font-size: 0.875rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    background-color: white;
    transition: border-color var(--transition-fast);
}

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

.form-input:invalid {
    border-color: var(--error-500);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-select {
    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 var(--spacing-2) center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: var(--spacing-8);
}

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

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

.card-footer {
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--gray-200);
    background-color: var(--gray-50);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table th,
.table td {
    padding: var(--spacing-3) var(--spacing-4);
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.table th {
    font-weight: 600;
    color: var(--gray-700);
    background-color: var(--gray-50);
}

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

/* Loading spinner */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-left-color: var(--primary-600);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-4);
}

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

/* Notification */
.notification {
    position: fixed;
    top: var(--spacing-4);
    right: var(--spacing-4);
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    max-width: 400px;
    animation: slideIn 300ms ease;
}

.notification.success {
    border-color: var(--success-500);
    background-color: var(--success-50);
}

.notification.error {
    border-color: var(--error-500);
    background-color: var(--error-50);
}

.notification.warning {
    border-color: var(--warning-500);
    background-color: var(--warning-50);
}

.notification-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4);
    gap: var(--spacing-4);
}

.notification-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--gray-500);
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Responsive breakpoints */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-3);
    }
    
    h1 { font-size: 1.875rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
}

[data-theme="dark"] {
    /* Dark theme colors matching pegboard */
    --bg: #0b1220;
    --fg: #e6e8ee;
    --muted: #9aa3b2;
    --panel: #0f172a;
    --panel-border: #1f2937;
    --accent: #a78bfa;
    --good: #22c55e;
    --warn: #fb923c;
    --bad: #f87171;
    --shadow: 0 8px 18px rgba(0,0,0,0.35);
    
    /* Override semantic colors for dark mode */
    --primary-color: var(--accent);
    --primary-dark: #8b5cf6;
    --primary-rgb: 167, 139, 250;
    --secondary-color: #6b7280;
    --success-color: var(--good);
    --warning-color: var(--warn);
    --danger-color: var(--bad);
    
    /* Background colors */
    --background-primary: var(--bg);
    --background-secondary: #111827;
    --card-bg: var(--panel);
    --input-bg: #1f2937;
    
    /* Text colors */
    --text-primary: var(--fg);
    --text-secondary: var(--muted);
    --text-muted: #6b7280;
    
    /* Border colors */
    --border-color: var(--panel-border);
    --border-light: #374151;
    
    /* Update color palette for dark mode */
    --gray-50: #1f2937;
    --gray-100: #374151;
    --gray-200: #4b5563;
    --gray-300: #6b7280;
    --gray-400: #9ca3af;
    --gray-500: #d1d5db;
    --gray-600: #e5e7eb;
    --gray-700: #f3f4f6;
    --gray-800: #f9fafb;
    --gray-900: #ffffff;
}

/* Dev Auth Panel */
.dev-auth-panel {
    position: fixed;
    top: 8px;
    right: 8px;
    z-index: 2000;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 10px 12px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 230px;
}

.dev-auth-panel h4 {
    margin: 0;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 600;
}

.dev-auth-users {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 6px;
}

.dev-auth-users button {
    font-size: 0.675rem;
    padding: 4px 6px;
    line-height: 1.1;
}

.dev-auth-current {
    font-size: 0.7rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.dev-auth-close {
    position: absolute;
    top: 4px;
    right: 6px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 12px;
}

[data-theme="dark"] .dev-auth-panel {
    background: var(--gray-800);
}