/* ============================================
   Critique Design System
   ============================================ */

:root {
    /* Colors */
    --background: #fafafa;
    --surface: #ffffff;
    --surface-muted: #f5f5f5;
    --text-primary: #111111;
    --text-secondary: #555555;
    --text-muted: #888888;
    --border: #e0e0e0;
    --border-light: #eeeeee;
    --primary: #1a1a1a;
    --primary-hover: #333333;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --success: #16a34a;
    --success-bg: #f0fdf4;
    --success-border: #86efac;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --warning-border: #fcd34d;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --danger-border: #fca5a5;
    --focus: #2563eb;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.75rem;
    --leading-tight: 1.25;
    --leading-normal: 1.6;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-8: 3rem;

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
}

/* ============================================
   Base
   ============================================ */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--background);
    color: var(--text-primary);
    line-height: var(--leading-normal);
    min-height: 100vh;
    overflow-wrap: break-word;
    word-break: break-word;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ============================================
   Layout
   ============================================ */

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-6) var(--space-5);
}

.container-wide {
    max-width: 860px;
    margin: 0 auto;
    padding: var(--space-6) var(--space-5);
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    padding: var(--space-4) var(--space-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: var(--text-lg);
    color: var(--text-primary);
    text-decoration: none;
}

.navbar-brand:hover {
    text-decoration: none;
}

.navbar-brand svg {
    display: block;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.navbar-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--text-sm);
}

.navbar-nav a:hover {
    color: var(--text-primary);
    text-decoration: none;
}

.navbar-nav a[aria-current="page"] {
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================
   Buttons
   ============================================ */


/* Compact navbar button */
.btn-nav {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    line-height: 1.4;
    text-decoration: none;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-primary);
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.btn-nav:hover {
    background: var(--surface-muted);
    text-decoration: none;
}

.btn-nav svg {
    flex-shrink: 0;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    border: 1px solid transparent;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
    line-height: 1.4;
}

.btn:hover {
    text-decoration: none;
}

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

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

.btn-primary:hover {
    background: var(--accent-hover);
}

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

.btn-secondary:hover {
    background: var(--surface-muted);
}

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

.btn-danger:hover {
    background: #b91c1c;
}

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

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

/* ============================================
   Forms
   ============================================ */

.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-primary);
}

.form-helper {
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin-top: var(--space-1);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-family: inherit;
    background: var(--surface);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
}

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

.form-input::placeholder,
.form-textarea::placeholder {
    color: #999999;
}

/* ============================================
   Cards
   ============================================ */

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
}

.card + .card {
    margin-top: var(--space-5);
}

/* ============================================
   Alerts
   ============================================ */

.alert {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    margin-top: var(--space-3);
}

.alert-success {
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: #166534;
}

.alert-error {
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: #991b1b;
}

.alert-warning {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: #92400e;
}

/* ============================================
   Loading / Empty / Error states
   ============================================ */

.loading-state,
.empty-state,
.error-state {
    text-align: center;
    padding: var(--space-8) var(--space-4);
    color: var(--text-secondary);
}

.loading-spinner {
    display: inline-block;
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-light);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: var(--space-4);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.empty-state h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.error-state {
    color: var(--danger);
}

/* ============================================
   Badge
   ============================================ */

.badge {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    border-radius: 999px;
    font-size: var(--text-xs);
    font-weight: 600;
    background: var(--surface-muted);
    color: var(--text-secondary);
}

/* ============================================
   Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 600px) {
    .container,
    .container-wide {
        padding: var(--space-4) var(--space-3);
    }

    .navbar {
        padding: var(--space-3) var(--space-4);
    }

    .navbar-nav {
        gap: var(--space-3);
    }

    .card {
        padding: var(--space-4);
    }
}