/* ============================================
   Design Tokens
   ============================================ */
:root {
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-muted: #57606a;
    --color-link: #0366d6;
    --color-link-hover: #024ea4;
    --color-border: #d0d7de;
    --color-accent: #0366d6;
    --color-accent-light: #ddf4ff;
    --color-danger: #d1242f;
    --color-success: #1a7f37;

    --font-body: 'Atkinson Hyperlegible', system-ui, -apple-system, sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;

    --max-width: 48rem;
    --radius: 6px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 3rem;
}

/* ============================================
   Reset
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-link);
    text-decoration: none;
}
a:hover {
    color: var(--color-link-hover);
    text-decoration: underline;
}

/* ============================================
   Layout
   ============================================ */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   Component: NavBar
   Partial: layouts/application.html.erb
   ============================================ */
.navbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    margin-bottom: var(--spacing-xl);
}
.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.navbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    font-family: var(--font-mono);
}
.navbar-brand:hover {
    color: var(--color-accent);
    text-decoration: none;
}
.navbar-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* ============================================
   Component: Flash Messages
   Partial: layouts/_flash.html.erb
   ============================================ */
.flash {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-lg);
    border: 1px solid;
}
.flash-notice {
    background: var(--color-accent-light);
    border-color: var(--color-accent);
    color: var(--color-text);
}
.flash-alert {
    background: #ffeef0;
    border-color: var(--color-danger);
    color: var(--color-danger);
}

/* ============================================
   Component: LinkCard
   Partial: links/_link.html.erb
   ============================================ */
.links-header {
    margin-bottom: var(--spacing-lg);
}
.links-header h1 {
    font-size: 1.5rem;
}

.link-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.link-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--spacing-lg);
    transition: border-color 150ms ease;
}
.link-card:hover {
    border-color: var(--color-accent);
}

.link-card-header {
    margin-bottom: var(--spacing-sm);
}
.link-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.3;
}
.link-card-title a {
    color: var(--color-text);
}
.link-card-title a:hover {
    color: var(--color-accent);
    text-decoration: none;
}
.link-card-domain {
    font-size: 0.8rem;
    color: var(--color-muted);
    font-family: var(--font-mono);
}
.link-card-repo {
    font-size: 0.8rem;
    font-family: var(--font-mono);
    margin-left: var(--spacing-sm);
}

.link-card-description {
    color: var(--color-muted);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.link-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.tag {
    display: inline-block;
    background: var(--color-accent-light);
    color: var(--color-accent);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px var(--spacing-sm);
    border-radius: var(--radius);
}

.link-card-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}
.link-action {
    font-size: 0.8rem;
    color: var(--color-muted);
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    padding: 0;
}
.link-action:hover {
    color: var(--color-accent);
    text-decoration: none;
}
.link-action-danger:hover {
    color: var(--color-danger);
}

/* ============================================
   Component: LinkDetail
   Partial: links/show.html.erb
   ============================================ */
.link-detail {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--spacing-xl);
}
.link-detail h1 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}
.link-detail-url {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-muted);
    margin-bottom: var(--spacing-lg);
    word-break: break-all;
}
.link-detail-repo {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-lg);
}
.link-detail-description {
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}
.link-detail-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* ============================================
   Component: Empty State
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: var(--color-muted);
}
.empty-state p {
    margin-bottom: var(--spacing-md);
}

/* ============================================
   Forms
   Partial: links/_form.html.erb
   ============================================ */
.form .field {
    margin-bottom: var(--spacing-lg);
}
.form .field label {
    display: block;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}
.form .field input,
.form .field textarea,
.form .field select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    background: var(--color-surface);
    color: var(--color-text);
}
.form .field input:focus,
.form .field textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-light);
}
.form .actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.form-errors {
    background: #ffeef0;
    border: 1px solid var(--color-danger);
    border-radius: var(--radius);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    color: var(--color-danger);
}
.form-errors h2 {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
}
.form-errors ul {
    padding-left: var(--spacing-lg);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    border: 1px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 150ms ease, border-color 150ms ease;
    text-decoration: none;
}
.btn:hover {
    text-decoration: none;
}
.btn-primary {
    background: var(--color-accent);
    color: white;
}
.btn-primary:hover {
    background: var(--color-link-hover);
    color: white;
}
.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border);
}
.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-text);
}
.btn-danger {
    background: var(--color-surface);
    color: var(--color-danger);
    border-color: var(--color-danger);
}
.btn-danger:hover {
    background: var(--color-danger);
    color: white;
}
.btn-sm {
    font-size: 0.8rem;
    padding: var(--spacing-xs) var(--spacing-md);
}

/* ============================================
   Responsive — mobile-first, one breakpoint
   ============================================ */
@media (min-width: 600px) {
    .link-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}