/* ===== JetBrains Mono ===== */
@font-face {
    font-family: 'JetBrains Mono';
    src: url('/static/fonts/JetBrainsMono-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'JetBrains Mono';
    src: url('/static/fonts/JetBrainsMono-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'JetBrains Mono';
    src: url('/static/fonts/JetBrainsMono-Italic.woff2') format('woff2');
    font-weight: 400;
    font-style: italic;
    font-display: swap;
}

/* ===== CSS Custom Properties ===== */
:root {
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", monospace;

    --bg: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-tertiary: #eef1f5;
    --fg: #1f2328;
    --fg-muted: #656d76;
    --fg-subtle: #8b949e;
    --border: #d1d9e0;
    --border-muted: #e1e4e8;

    --color-open: #1a7f37;
    --color-closed: #cf222e;
    --color-merged: #8250df;

    --color-accent: #0969da;
    --color-accent-hover: #0550ae;

    --diff-add-bg: #dafbe1;
    --diff-add-line-bg: #ccffd8;
    --diff-del-bg: #ffebe9;
    --diff-del-line-bg: #ffd7d5;
    --diff-hunk-bg: #ddf4ff;
    --diff-hunk-fg: #656d76;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
    --radius: 6px;
    --radius-lg: 8px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0d1117;
        --bg-secondary: #161b22;
        --bg-tertiary: #1c2128;
        --fg: #e6edf3;
        --fg-muted: #8b949e;
        --fg-subtle: #6e7681;
        --border: #30363d;
        --border-muted: #21262d;

        --color-open: #3fb950;
        --color-closed: #f85149;
        --color-merged: #a371f7;

        --color-accent: #58a6ff;
        --color-accent-hover: #79c0ff;

        --diff-bg: #2b2b2b;
        --diff-add-bg: #2d3b2d;
        --diff-add-line-bg: #364736;
        --diff-del-bg: #3c2b2b;
        --diff-del-line-bg: #4b3536;
        --diff-hunk-bg: #32383d;
        --diff-hunk-fg: #808080;

        --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
        --shadow-md: 0 2px 8px rgba(0,0,0,0.4);
    }
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
    color: var(--fg);
    background: var(--bg);
    -webkit-text-size-adjust: 100%;
}

body { min-height: 100vh; }

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

code, pre { font-family: var(--font-mono); font-size: 0.875em; font-variant-ligatures: contextual; }
code { background: var(--bg-tertiary); padding: 0.15em 0.4em; border-radius: 3px; }

img { max-width: 100%; }

/* ===== Navigation ===== */
.top-nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 16px;
    height: 48px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--fg);
    letter-spacing: -0.5px;
}
.nav-brand:hover { text-decoration: none; color: var(--color-accent); }

.breadcrumbs { display: flex; align-items: center; gap: 6px; font-size: 0.875rem; }
.breadcrumbs .sep { color: var(--fg-muted); }

.nav-right { margin-left: auto; }
.nav-link { font-size: 0.875rem; color: var(--fg-muted); }
.nav-link:hover { color: var(--fg); }

.btn-login {
    background: var(--color-accent);
    color: #fff !important;
    padding: 6px 14px;
    border-radius: var(--radius);
    font-weight: 500;
}
.btn-login:hover { background: var(--color-accent-hover); text-decoration: none; }

/* ===== Container ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px 16px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    color: var(--fg);
    cursor: pointer;
    text-decoration: none;
    transition: background 0.1s, border-color 0.1s;
}
.btn:hover { background: var(--bg-tertiary); text-decoration: none; border-color: var(--fg-subtle); }

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}
.btn-primary:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); color: #fff; }

.btn-sm { padding: 3px 10px; font-size: 0.8rem; }
.btn-lg { padding: 10px 24px; font-size: 1rem; }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-ghost:hover { background: var(--bg-tertiary); }

/* ===== Hero ===== */
.hero {
    text-align: center;
    padding: 120px 20px 80px;
}
.hero h1 { font-size: 2.5rem; font-weight: 800; letter-spacing: -1px; margin-bottom: 12px; }
.hero-sub { font-size: 1.2rem; color: var(--fg-muted); margin-bottom: 32px; }

/* ===== Avatars ===== */
.avatar { border-radius: 50%; vertical-align: middle; }
.avatar-xs { width: 18px; height: 18px; }
.avatar-sm { width: 28px; height: 28px; }
.avatar-md { width: 40px; height: 40px; }

/* ===== Badges ===== */
.badge {
    display: inline-block;
    padding: 1px 8px;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 12px;
    line-height: 1.6;
}
.badge-private { background: var(--bg-tertiary); color: var(--fg-muted); }

.label {
    display: inline-block;
    padding: 1px 8px;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 12px;
    color: #fff;
    line-height: 1.6;
}

/* ===== Page Header ===== */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}
.page-header h1 { font-size: 1.5rem; font-weight: 700; }

/* ===== State Tabs ===== */
.state-tabs { display: flex; gap: 2px; }
.state-tab {
    padding: 6px 14px;
    font-size: 0.875rem;
    border-radius: var(--radius);
    color: var(--fg-muted);
}
.state-tab:hover { text-decoration: none; background: var(--bg-tertiary); }
.state-tab.active { background: var(--color-accent); color: #fff; }

/* ===== Org Sections ===== */
.org-section {
    margin-bottom: 20px;
}

.org-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--bg-secondary);
    list-style: none;
    user-select: none;
}

summary.org-header { padding: 14px 12px; }
.org-header::-webkit-details-marker { display: none; }

.org-header::before {
    content: "▶";
    font-size: 0.65rem;
    color: var(--fg-muted);
    transition: transform 0.15s;
}

.org-section[open] > .org-header::before {
    transform: rotate(90deg);
}

.org-header:hover { background: var(--bg-tertiary); }

.org-name { flex: 1; }

.org-count {
    background: var(--bg-tertiary);
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--fg-muted);
}

.org-section > .repo-list {
    margin-top: 8px;
    margin-left: 0;
}

/* ===== Repo Search ===== */
.repo-search {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}
.repo-search input[type="text"] {
    flex: 1;
    padding: 8px 12px;
    font-size: 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--fg);
}
.repo-search input[type="text"]:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(9,105,218,0.15);
}

/* ===== Repo List ===== */
.repo-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 12px;
}

.repo-card {
    display: block;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--bg);
    transition: border-color 0.15s, box-shadow 0.15s;
    color: var(--fg);
}
.repo-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow-md); text-decoration: none; }

.repo-card-header { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.repo-fullname { font-weight: 600; font-size: 0.95rem; }
.repo-desc { color: var(--fg-muted); font-size: 0.85rem; margin-bottom: 8px; }
.repo-meta { display: flex; gap: 12px; font-size: 0.8rem; color: var(--fg-subtle); }
.repo-lang { font-weight: 500; }

/* ===== PR List ===== */
.pr-list { display: flex; flex-direction: column; gap: 1px; background: var(--border-muted); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); }

.pr-card {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg);
    color: var(--fg);
    transition: background 0.1s;
}
.pr-card:hover { background: var(--bg-secondary); text-decoration: none; }

.pr-status-icon { font-size: 0.7rem; margin-top: 5px; }
.pr-info { flex: 1; min-width: 0; }
.pr-title-row { display: flex; gap: 8px; align-items: baseline; }
.pr-title { font-weight: 600; }
.pr-number { color: var(--fg-muted); font-weight: 400; }
.pr-meta { font-size: 0.8rem; color: var(--fg-muted); margin-top: 2px; display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.pr-comments { margin-left: 8px; }
.pr-labels { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; align-self: center; }

/* ===== PR Detail Header ===== */
.pr-header-detail { margin-bottom: 20px; }
.pr-title-main { font-size: 1.6rem; font-weight: 700; line-height: 1.3; }
.pr-number-lg { color: var(--fg-muted); font-weight: 400; }

.pr-header-meta { display: flex; align-items: center; gap: 10px; margin-top: 8px; flex-wrap: wrap; }

.pr-state-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #fff;
}
.pr-state-badge.state-open { background: var(--color-open); }
.pr-state-badge.state-closed { background: var(--color-closed); }
.pr-state-badge[data-merged="true"] { background: var(--color-merged); }

.pr-branch-info { font-size: 0.875rem; color: var(--fg-muted); display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.pr-branch-info code { font-size: 0.8rem; }

/* ===== Tabs ===== */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
}

.tab {
    padding: 10px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--fg-muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.tab:hover { text-decoration: none; color: var(--fg); border-bottom-color: var(--border); }
.tab.active { color: var(--fg); border-bottom-color: var(--color-accent); }
.tab-count {
    background: var(--bg-tertiary);
    padding: 0 7px;
    border-radius: 10px;
    font-size: 0.75rem;
    min-width: 20px;
    text-align: center;
}

/* ===== Conversation / Comments ===== */
.conversation { max-width: 900px; }

.comment-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    overflow: hidden;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}
.comment-time { color: var(--fg-subtle); }

.comment-body { padding: 16px; }

.markdown-body { line-height: 1.6; }
.markdown-body p { margin-bottom: 12px; }
.markdown-body p:last-child { margin-bottom: 0; }
.markdown-body pre { background: var(--bg-secondary); padding: 12px; border-radius: var(--radius); overflow-x: auto; margin: 12px 0; }
.markdown-body pre code { background: none; padding: 0; }
.markdown-body ul, .markdown-body ol { padding-left: 24px; margin: 8px 0; }
.markdown-body blockquote { border-left: 3px solid var(--border); padding-left: 12px; color: var(--fg-muted); margin: 8px 0; }
.markdown-body img { border-radius: var(--radius); }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { margin: 16px 0 8px; }
.markdown-body table { border-collapse: collapse; margin: 12px 0; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border); padding: 6px 12px; }
.markdown-body th { background: var(--bg-secondary); }

.review-state-badge {
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}
.review-state-badge.review-approved { background: #dafbe1; color: #1a7f37; }
.review-state-badge.review-changes_requested { background: #ffebe9; color: #cf222e; }
.review-state-badge.review-commented { background: var(--bg-tertiary); color: var(--fg-muted); }

@media (prefers-color-scheme: dark) {
    .review-state-badge.review-approved { background: #12261e; color: #3fb950; }
    .review-state-badge.review-changes_requested { background: #2a1216; color: #f85149; }
}

/* ===== Forms ===== */
.comment-form-container, .review-form-container {
    margin-top: 20px;
}

.review-form-container { border-top: 1px solid var(--border); padding-top: 20px; }
.review-form-container h3 { font-size: 1rem; margin-bottom: 12px; }

textarea {
    width: 100%;
    padding: 10px 12px;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--fg);
    resize: vertical;
    line-height: 1.5;
}
textarea:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(9,105,218,0.15); }

.form-actions { margin-top: 8px; display: flex; justify-content: flex-end; }

.review-options {
    display: flex;
    gap: 16px;
    margin: 12px 0;
    flex-wrap: wrap;
}

.review-option {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.875rem;
}
.review-option-label.approve { color: var(--color-open); font-weight: 500; }
.review-option-label.changes { color: var(--color-closed); font-weight: 500; }

/* ===== File Navigation ===== */
.file-nav {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding: 8px 0;
}
.file-nav-name { flex: 1; font-weight: 600; text-align: center; font-size: 0.875rem; }

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--fg-muted);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .container { padding: 16px 12px; }
    .hero h1 { font-size: 1.8rem; }
    .hero { padding: 60px 16px 40px; }
    .repo-list { grid-template-columns: 1fr; }
    .pr-title-main { font-size: 1.2rem; }
    .pr-header-meta { font-size: 0.8rem; }
    .breadcrumbs { font-size: 0.75rem; }
    .nav-inner { padding: 0 12px; gap: 8px; }
    .tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; }
}