/* =========================================================
   Ai-folio — terminal-native stylesheet
   design tokens: warm dark canvas, IBM Plex Mono, sharp edges,
   single accent, flat surfaces, no shadows
   ========================================================= */

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

:root {
    /* surface ramp — terminal cells, no flat black */
    --bg:           #201d1d;
    --bg-alt:       #181515;
    --surface:      #2a2626;
    --surface-2:    #302c2c;
    --surface-input:#1a1717;

    /* ink ramp */
    --ink:          #fdfcfc;
    --ink-2:        #d2cfce;
    --muted:        #9a9898;
    --dim:          #646262;

    /* borders — warm transparent dark */
    --border:       rgba(253, 252, 252, 0.08);
    --border-2:     rgba(253, 252, 252, 0.14);
    --border-strong:#464343;

    /* single accent (blue) + apple semantic ramp */
    --accent:       #007aff;
    --accent-hov:   #0056b3;
    --accent-act:   #004085;
    --on-accent:    #fdfcfc;

    --success:      #30d158;
    --warning:      #ff9f0a;
    --danger:       #ff3b30;

    /* tag colors — only used inside brackets, never on chrome */
    --tag-models:   #5ac8fa;
    --tag-news:     #ff9f0a;
    --tag-arch:     #bd93f9;

    /* type */
    --mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--mono);
    font-size: 14px;
    line-height: 1.55;
    color: var(--ink);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "calt" 0, "liga" 0;  /* keep mono grid honest */
}

a { color: inherit; text-decoration: none; }

::selection { background: var(--accent); color: var(--on-accent); }

/* =========================================================
   topbar
   ========================================================= */
.topbar {
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(8px);
}

.topbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.brand {
    display: inline-flex;
    align-items: baseline;
    gap: 0.5rem;
    font-weight: 600;
}

.brand-mark { color: var(--accent); }
.brand-name { color: var(--ink); white-space: nowrap; }
.brand-sub  {
    color: var(--muted);
    font-weight: 400;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 13px;
}

.nav a {
    color: var(--ink-2);
    transition: color 0.1s ease;
    white-space: nowrap;
}

.nav a:hover { color: var(--accent); }

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0 0 rgba(48, 209, 88, 0.4);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%   { box-shadow: 0 0 0 0 rgba(48, 209, 88, 0.4); }
    70%  { box-shadow: 0 0 0 6px rgba(48, 209, 88, 0); }
    100% { box-shadow: 0 0 0 0 rgba(48, 209, 88, 0); }
}

/* =========================================================
   hero terminal
   ========================================================= */
.hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 1rem;
}

.terminal {
    background: var(--bg-alt);
    border: 1px solid var(--border-2);
    border-radius: 6px;
    overflow: hidden;
}

.terminal-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border-2);
    font-size: 12px;
    color: var(--muted);
}

.terminal-bar .dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    display: inline-block;
}

.dot-r { background: #ff5f57; }
.dot-y { background: #febc2e; }
.dot-g { background: #28c840; }

.terminal-title {
    margin-left: 0.75rem;
    flex: 1;
    text-align: center;
    color: var(--dim);
}

.terminal-body {
    padding: 1.75rem 1.75rem 2.25rem;
}

.t-line {
    font-size: 13px;
    line-height: 1.7;
    color: var(--ink-2);
}

.t-line.muted { color: var(--muted); }

.prompt { color: var(--success); user-select: none; }
.cmd    { color: var(--ink); }
.flag   { color: var(--accent); }
.str    { color: var(--warning); }
.ok     { color: var(--success); }

.kbd {
    display: inline-block;
    padding: 0 0.4rem;
    border: 1px solid var(--border-strong);
    border-radius: 3px;
    background: var(--surface);
    color: var(--ink);
    font-size: 11px;
    line-height: 1.4;
}

.t-h1 {
    font-size: clamp(1.8rem, 5vw, 3rem);
    line-height: 1.1;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 1.25rem 0 1rem;
    color: var(--ink);
}

.t-h1 em {
    font-style: italic;
    font-weight: 400;
    color: var(--accent);
}

.t-sub {
    color: var(--muted);
    font-size: 14px;
    max-width: 640px;
    line-height: 1.65;
    margin-bottom: 1.5rem;
}

.t-actions {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin: 1rem 0 1.5rem;
}

.t-meta {
    color: var(--muted);
    font-size: 12px;
    margin-top: 0.75rem;
}

/* =========================================================
   buttons
   ========================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1rem;
    border: 1px solid var(--border-strong);
    border-radius: 4px;
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 500;
    line-height: 1.2;
    cursor: pointer;
    transition: all 0.1s ease;
    background: transparent;
    color: var(--ink);
}

.btn-primary {
    background: var(--accent);
    color: var(--on-accent);
    border-color: var(--accent);
}

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

.btn-primary:active { background: var(--accent-act); border-color: var(--accent-act); }

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* =========================================================
   section heads
   ========================================================= */
.section-head {
    max-width: 1200px;
    margin: 2.5rem auto 1rem;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 13px;
    color: var(--muted);
    border-bottom: 1px dashed var(--border-2);
    padding-bottom: 0.6rem;
}

.head-right {
    margin-left: auto;
    font-size: 12px;
    color: var(--dim);
}

/* =========================================================
   featured
   ========================================================= */
.featured, .filters-bar, .newsletter {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.featured-card {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 0;
    background: var(--bg-alt);
    border: 1px solid var(--border-2);
    border-radius: 6px;
    overflow: hidden;
}

.featured-main {
    padding: 2rem 2.25rem;
    border-right: 1px solid var(--border-2);
}

.featured-aside {
    background: var(--surface-input);
    padding: 1.5rem 1.75rem;
    font-size: 13px;
}

.aside-title {
    color: var(--muted);
    font-size: 12px;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px dashed var(--border-2);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 0.45rem 0;
    border-bottom: 1px dashed var(--border);
    color: var(--muted);
}

.stat-row:last-child { border-bottom: none; }

.stat-val {
    color: var(--ink);
    font-weight: 500;
}

/* =========================================================
   post meta, badges, titles
   ========================================================= */
.meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.meta-sep { color: var(--dim); }

.badge {
    display: inline-block;
    padding: 0.1rem 0.4rem;
    font-size: 11px;
    font-weight: 500;
    border-radius: 3px;
    background: var(--surface);
    color: var(--ink-2);
}

.badge-models { color: var(--tag-models); }
.badge-news   { color: var(--tag-news); }
.badge-arch   { color: var(--tag-arch); }
.badge-repos  { color: var(--success); }

.post-title {
    font-size: 1.5rem;
    line-height: 1.2;
    font-weight: 600;
    letter-spacing: -0.015em;
    color: var(--ink);
    margin: 0.5rem 0 0.75rem;
}

.post-title.big {
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    line-height: 1.1;
}

.post-title em {
    font-style: italic;
    font-weight: 400;
    color: var(--accent);
}

.post-excerpt {
    color: var(--ink-2);
    font-size: 14px;
    line-height: 1.65;
    margin-bottom: 1rem;
}

.post-actions, .post-foot {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 13px;
    margin-top: 1rem;
}

.post-foot { justify-content: space-between; }

.read-link {
    color: var(--accent);
    font-weight: 500;
}

.read-link:hover { text-decoration: underline; }

.muted { color: var(--muted); }

/* =========================================================
   filters
   ========================================================= */
.filters {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
    padding: 0 0 0.5rem;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border-2);
    color: var(--ink-2);
    font-family: var(--mono);
    font-size: 12px;
    padding: 0.35rem 0.7rem;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.1s ease;
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.filter-btn.active {
    background: var(--accent);
    color: var(--on-accent);
    border-color: var(--accent);
}

.filter-meta {
    margin-left: auto;
    color: var(--dim);
    font-size: 12px;
}

/* =========================================================
   post grid
   ========================================================= */
.post-grid {
    max-width: 1200px;
    margin: 0 auto 3rem;
    padding: 0 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1px;
    background: var(--border-2);
    border: 1px solid var(--border-2);
    border-radius: 6px;
    overflow: hidden;
}

.post-grid.plain {
    background: transparent;
    border: none;
    border-radius: 0;
    overflow: visible;
    gap: 1rem;
}

.post-grid.plain .post-card {
    border: 1px solid var(--border-2);
    border-radius: 6px;
}

.post-grid.hidden { display: none; }

.post-card {
    background: var(--bg-alt);
    padding: 1.5rem 1.5rem 1.25rem;
    transition: background 0.1s ease;
    display: flex;
    flex-direction: column;
}

.post-card.hidden { display: none; }

.post-card:hover {
    background: var(--surface);
}

.post-card .post-title {
    font-size: 1.05rem;
    margin: 0.4rem 0 0.6rem;
}

.post-card .post-excerpt {
    font-size: 13px;
    color: var(--muted);
    flex: 1;
}

.post-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 0.4rem;
}

.post-date { color: var(--dim); }

/* =========================================================
   trending repos
   ========================================================= */
.repos {
    max-width: 1200px;
    margin: 0 auto 3rem;
    padding: 0 1.5rem;
}

.repo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1px;
    background: var(--border-2);
    border: 1px solid var(--border-2);
    border-radius: 6px;
    overflow: hidden;
}

.repo-card {
    background: var(--bg-alt);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    transition: background 0.1s ease;
}

.repo-card:hover { background: var(--surface); }

.repo-card .post-title { font-size: 1rem; margin: 0.4rem 0 0.6rem; }
.repo-card .post-title a { color: var(--ink); }
.repo-card .post-title a:hover { color: var(--accent); }
.repo-card .post-excerpt { font-size: 13px; color: var(--muted); flex: 1; }

.badge-repos { color: var(--success); }

/* =========================================================
   newsletter
   ========================================================= */
.newsletter-card {
    background: var(--bg-alt);
    border: 1px solid var(--border-2);
    border-radius: 6px;
    padding: 2.25rem 2rem 2rem;
    margin-bottom: 3rem;
}

.newsletter-card .post-title { margin-top: 0.75rem; }

.newsletter-form {
    display: flex;
    align-items: stretch;
    gap: 0;
    max-width: 540px;
    margin: 1.5rem 0 0.75rem;
    background: var(--surface-input);
    border: 1px solid var(--border-strong);
    border-radius: 4px;
    overflow: hidden;
}

.form-prompt {
    padding: 0 0.6rem 0 0.85rem;
    display: flex;
    align-items: center;
    color: var(--success);
    font-size: 13px;
}

.newsletter-form input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--ink);
    font-family: var(--mono);
    font-size: 13px;
    padding: 0.65rem 0.5rem;
    outline: none;
    min-width: 0;
}

.newsletter-form input::placeholder { color: var(--dim); }

.newsletter-form .btn {
    border: none;
    border-left: 1px solid var(--border-strong);
    border-radius: 0;
    padding: 0.65rem 1.1rem;
}

.newsletter-form input:focus + .btn,
.newsletter-form input:focus { }

/* =========================================================
   footer
   ========================================================= */
footer {
    border-top: 1px solid var(--border-2);
    background: var(--bg-alt);
    margin-top: 2rem;
}

.footer-top {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 1.5rem;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
}

.footer-brand p {
    margin-top: 0.75rem;
    max-width: 320px;
    line-height: 1.6;
}

.footer-cols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.col-title {
    color: var(--muted);
    font-size: 12px;
    margin-bottom: 0.85rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px dashed var(--border-2);
}

.footer-cols ul { list-style: none; }

.footer-cols li { margin-bottom: 0.45rem; }

.footer-cols a {
    color: var(--ink-2);
    font-size: 13px;
    transition: color 0.1s ease;
}

.footer-cols a:hover { color: var(--accent); }

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    border-top: 1px dashed var(--border-2);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--muted);
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* =========================================================
   responsive
   ========================================================= */
@media (max-width: 900px) {
    .featured-card { grid-template-columns: 1fr; }
    .featured-main { border-right: none; border-bottom: 1px solid var(--border-2); }
    .footer-top { grid-template-columns: 1fr; gap: 2rem; }
    .footer-cols { grid-template-columns: repeat(3, 1fr); }
    .nav { gap: 1rem; font-size: 12px; }
    .terminal-title { display: none; }
}

@media (max-width: 640px) {
    .topbar-inner { flex-direction: column; align-items: flex-start; gap: 0.5rem; padding: 0.75rem 1rem; }
    .brand { max-width: 100%; }
    .brand-sub { flex: 1; }
    .nav { width: 100%; overflow-x: auto; }
    .hero { padding: 1.5rem 1rem 0.5rem; }
    .terminal-body { padding: 1.25rem 1rem 1.75rem; }
    .post-grid, .repo-grid { grid-template-columns: 1fr; }
    .footer-cols { grid-template-columns: 1fr 1fr; }
    .newsletter-form { flex-wrap: wrap; border-radius: 4px; }
    .newsletter-form input { flex: 1 1 100%; padding: 0.75rem 0.85rem; }
    .newsletter-form .btn { border-left: none; border-top: 1px solid var(--border-strong); flex: 1 1 100%; justify-content: center; }
    .section-head { padding: 0 1rem 0.6rem; flex-wrap: wrap; }
    .featured, .filters-bar, .newsletter, .post-grid, .repos { padding-left: 1rem; padding-right: 1rem; }
}