/* Agentic Cover — publications & post pages.
   Light editorial theme, scoped under body.pub-light so the rest of the
   site keeps its dark styling. */

body.pub-light {
    --ink: #16171d;
    --ink-soft: #55565e;
    --ink-faint: #8a8b93;
    --paper: #fcfcfa;
    --hairline: #e3e2db;
    --accent: #2b45ff;
    --accent-soft: #eef0ff;
    --serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
    --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
    --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;

    background-color: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
}

/* Light navbar + footer overrides (style.css paints them dark) */
body.pub-light .navbar {
    background: rgba(252, 252, 250, 0.88);
    border-bottom: 1px solid var(--hairline);
}

body.pub-light .nav-links a {
    color: var(--ink-soft);
}

body.pub-light .nav-links a:hover {
    color: var(--ink);
}

body.pub-light .nav-links a.active {
    color: var(--accent);
}

body.pub-light .hamburger-line {
    background: var(--ink);
}

body.pub-light footer {
    background: var(--paper);
    border-top: 1px solid var(--hairline);
    color: var(--ink-faint);
}

body.pub-light .footer-social a {
    color: var(--ink-soft);
}

/* Layout */
.pub-main {
    max-width: 1080px;
    margin: 0 auto;
    padding: 120px 1.5rem 5rem;
}

/* Hero */
.pub-hero {
    padding: 2.5rem 0 3rem;
    border-bottom: 1px solid var(--ink);
}

.pub-kicker {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.3em;
    color: var(--accent);
    margin-bottom: 1rem;
}

.pub-brand {
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(3rem, 9vw, 5.5rem);
    line-height: 1.02;
    letter-spacing: -0.01em;
    color: var(--ink);
    background: none;
    -webkit-background-clip: initial;
    background-clip: initial;
    -webkit-text-fill-color: var(--ink);
}

.pub-brand-by {
    font-family: var(--serif);
    font-style: italic;
    font-size: 0.45em;
    color: var(--ink-faint);
    -webkit-text-fill-color: var(--ink-faint);
    margin-left: 0.35rem;
}

.pub-tagline {
    max-width: 560px;
    margin-top: 1.25rem;
    color: var(--ink-soft);
    font-size: 1.02rem;
    line-height: 1.6;
}

/* Subscribe band */
.subscribe-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    flex-wrap: wrap;
    border: 1px solid var(--hairline);
    border-top: none;
    background: #fff;
    padding: 1.1rem 1.4rem;
    position: relative;
}

.subscribe-bottom {
    border-top: 1px solid var(--hairline);
    margin-top: 4rem;
}

.subscribe-copy h3 {
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink);
    margin-bottom: 0.2rem;
}

.subscribe-copy h3 i {
    color: var(--accent);
    margin-right: 0.4rem;
}

.subscribe-copy p {
    color: var(--ink-faint);
    font-size: 0.85rem;
}

.subscribe-form {
    display: flex;
    gap: 0;
    flex: 0 1 420px;
    min-width: 260px;
}

.subscribe-form input {
    flex: 1;
    padding: 0.65rem 0.9rem;
    border: 1px solid var(--ink);
    border-right: none;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--mono);
    font-size: 0.85rem;
    outline: none;
    border-radius: 0;
}

.subscribe-form input::placeholder {
    color: var(--ink-faint);
}

.subscribe-form input:focus {
    border-color: var(--accent);
}

.subscribe-form button {
    padding: 0.65rem 1.3rem;
    border: 1px solid var(--ink);
    background: var(--ink);
    color: #fff;
    font-family: var(--mono);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    cursor: pointer;
    border-radius: 0;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.subscribe-form button:hover {
    background: var(--accent);
    border-color: var(--accent);
}

.subscribe-form button:disabled {
    opacity: 0.55;
    cursor: wait;
}

.subscribe-status {
    flex-basis: 100%;
    font-family: var(--mono);
    font-size: 0.75rem;
    min-height: 1em;
    margin: 0;
}

.subscribe-status:empty {
    display: none;
}

.subscribe-status.ok { color: #0a7d43; }
.subscribe-status.err { color: #c92f2f; }

/* Sections */
.pub-section {
    margin-top: 3.5rem;
}

.pub-section-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
}

.pub-section-title {
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-bottom: 0.5rem;
}

.pub-section-title i {
    color: var(--accent);
    margin-right: 0.5rem;
}

/* Tag filter */
.tag-filter {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.tag-btn {
    background: transparent;
    border: 1px solid var(--hairline);
    color: var(--ink-soft);
    padding: 0.25rem 0.7rem;
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.05em;
    cursor: pointer;
    border-radius: 999px;
    transition: all 0.15s ease;
}

.tag-btn:hover {
    border-color: var(--ink);
    color: var(--ink);
}

.tag-btn.active {
    background: var(--ink);
    border-color: var(--ink);
    color: #fff;
}

/* Post rows */
.post-list {
    border-top: 1px solid var(--ink);
}

.post-row {
    display: grid;
    grid-template-columns: 110px 1fr auto;
    gap: 1.5rem;
    align-items: baseline;
    padding: 1.6rem 0.25rem;
    border-bottom: 1px solid var(--hairline);
    text-decoration: none;
    color: var(--ink);
    transition: background 0.15s ease;
}

.post-row:hover {
    background: #fff;
}

.row-date {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-faint);
    white-space: nowrap;
}

.post-row.has-thumb {
    grid-template-columns: 110px 200px 1fr auto;
    align-items: start;
}

.row-thumb img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border: 1px solid var(--hairline);
    display: block;
}

.row-title {
    font-family: var(--serif);
    font-weight: 400;
    font-size: 1.65rem;
    line-height: 1.15;
    letter-spacing: -0.005em;
    margin-bottom: 0.4rem;
    transition: color 0.15s ease;
}

.post-row:hover .row-title {
    color: var(--accent);
}

.featured-list .row-title {
    font-size: 2.1rem;
}

.row-summary {
    color: var(--ink-soft);
    font-size: 0.93rem;
    line-height: 1.55;
    max-width: 640px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.row-tags {
    display: flex;
    gap: 0.9rem;
    flex-wrap: wrap;
    margin-top: 0.55rem;
}

.post-tag {
    font-family: var(--mono);
    font-size: 0.65rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
}

.row-side {
    display: flex;
    align-items: baseline;
    gap: 1.1rem;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-faint);
    white-space: nowrap;
}

.row-arrow {
    color: var(--ink);
    font-size: 1rem;
    transition: transform 0.15s ease, color 0.15s ease;
}

.post-row:hover .row-arrow {
    transform: translateX(4px);
    color: var(--accent);
}

.post-views i {
    margin-right: 0.25rem;
}

/* Single post */
.post-article {
    max-width: 720px;
    margin: 0 auto;
}

.post-loading {
    text-align: center;
    color: var(--ink-faint);
    font-family: var(--mono);
    font-size: 0.85rem;
}

.post-article .post-tags-line {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.25rem;
}

.post-title {
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(2.2rem, 6vw, 3.4rem);
    line-height: 1.08;
    letter-spacing: -0.01em;
    margin: 0 0 1.25rem;
    color: var(--ink);
    background: none;
    -webkit-background-clip: initial;
    background-clip: initial;
    -webkit-text-fill-color: var(--ink);
}

.post-header-meta {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-faint);
    padding-bottom: 1.5rem;
    margin-bottom: 2.25rem;
    border-bottom: 1px solid var(--ink);
}

.post-header-meta i {
    margin-right: 0.35rem;
}

.post-hero {
    margin: 0 0 2.25rem;
}

.post-hero img {
    width: 100%;
    display: block;
    border: 1px solid var(--hairline);
}

.post-hero figcaption {
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    color: var(--ink-faint);
    margin-top: 0.5rem;
}

.post-body {
    font-size: 1.06rem;
    line-height: 1.8;
    color: #2a2b31;
}

.post-body h3 {
    font-family: var(--serif);
    font-weight: 400;
    font-size: 1.6rem;
    color: var(--ink);
    margin: 2.4rem 0 0.8rem;
}

.post-body p {
    margin-bottom: 1.2rem;
}

.post-body ul,
.post-body ol {
    margin: 0 0 1.2rem 1.4rem;
}

.post-body li {
    margin-bottom: 0.6rem;
}

.post-body a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid rgba(43, 69, 255, 0.3);
}

.post-body a:hover {
    border-bottom-color: var(--accent);
}

.post-body strong {
    color: var(--ink);
    font-weight: 600;
}

.post-body em {
    color: var(--ink-soft);
}

.post-signoff {
    font-family: var(--serif);
    font-style: italic;
    font-size: 1.2rem;
    color: var(--ink-soft);
    margin-top: 2.5rem;
}

.post-nav {
    max-width: 720px;
    margin: 2.5rem auto 0;
}

.back-link {
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    color: var(--ink);
    text-decoration: none;
}

.back-link:hover {
    color: var(--accent);
}

.back-link i {
    margin-right: 0.4rem;
}

/* Responsive */
@media (max-width: 720px) {
    .pub-main {
        padding-top: 105px;
    }

    .post-row,
    .post-row.has-thumb {
        grid-template-columns: 1fr;
        gap: 0.4rem;
        padding: 1.3rem 0;
    }

    .row-thumb {
        max-width: 320px;
        margin-bottom: 0.4rem;
    }

    .row-side {
        margin-top: 0.35rem;
    }

    .row-title,
    .featured-list .row-title {
        font-size: 1.5rem;
    }

    .subscribe-box {
        flex-direction: column;
        align-items: stretch;
    }

    .subscribe-form {
        flex-basis: auto;
    }
}