/* ============================================================
   synop.stream — Static Site Stylesheet
   A clean, editorial reading experience.
   ============================================================ */

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

:root {
    --color-bg:          #f8f8f7;
    --color-surface:     #ffffff;
    --color-text:        #0f172a;
    --color-text-2:      #475569;
    --color-text-3:      #94a3b8;
    --color-border:      #e5e5e4;
    --color-border-2:    #d4d4d3;
    --color-accent:      #4f46e5;
    --color-accent-hover:#4338ca;
    --color-accent-bg:   #eef2ff;
    --color-video:       #dbeafe;
    --color-video-text:  #1e40af;
    --color-doc:         #fef3c7;
    --color-doc-text:    #92400e;
    --color-tldr-bg:     #f0f9ff;
    --color-tldr-border: #7dd3fc;
    --color-digest-bg:   #fffbeb;
    --color-digest-border:#fcd34d;
    --font-sans:         "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono:         "SF Mono", "Fira Code", Menlo, Consolas, monospace;
    --max-w:             1120px;
    --max-w-prose:       680px;
    --radius:            10px;
    --radius-sm:         6px;
    --shadow-sm:         0 1px 2px rgba(0,0,0,.04);
    --shadow:            0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow-md:         0 4px 12px rgba(0,0,0,.06), 0 1px 3px rgba(0,0,0,.04);
    --shadow-lg:         0 10px 30px rgba(0,0,0,.08), 0 2px 8px rgba(0,0,0,.04);
    --transition:        150ms cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-sans); background: var(--color-bg); color: var(--color-text); line-height: 1.65; font-size: 16px; }
img { display: block; max-width: 100%; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }

/* --- Header --- */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(248,248,247,.85);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}
.header-inner {
    max-width: var(--max-w); margin: 0 auto;
    padding: 0 24px; height: 56px;
    display: flex; align-items: center; justify-content: space-between;
}
.site-brand { display: flex; align-items: baseline; gap: 8px; text-decoration: none; }
.brand-name { font-size: .9375rem; font-weight: 650; color: var(--color-text); letter-spacing: -.01em; }
.brand-tag { font-size: .6875rem; color: var(--color-text-3); font-weight: 450; }
.header-stats { display: flex; gap: 16px; }
.header-stats .stat { font-size: .75rem; color: var(--color-text-3); }

/* --- Footer --- */
.site-footer { border-top: 1px solid var(--color-border); margin-top: 80px; }
.footer-inner { max-width: var(--max-w); margin: 0 auto; padding: 20px 24px; font-size: .75rem; color: var(--color-text-3); }
.footer-inner a { color: var(--color-text-2); font-weight: 500; }

/* --- Hero --- */
.hero { padding: 48px 24px 0; text-align: center; }
.hero-inner { max-width: 600px; margin: 0 auto; }
.hero h1 { font-size: clamp(1.5rem, 4vw, 2rem); font-weight: 700; letter-spacing: -.025em; line-height: 1.2; }
.hero-desc { margin-top: 8px; font-size: .9375rem; color: var(--color-text-2); line-height: 1.5; }
.empty-hero { text-align: center; padding: 80px 24px; color: var(--color-text-3); }

/* --- Toolbar (filters + search) --- */
.toolbar { position: sticky; top: 56px; z-index: 90; background: var(--color-bg); border-bottom: 1px solid var(--color-border); }
.toolbar-inner {
    max-width: var(--max-w); margin: 0 auto; padding: 12px 24px;
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    flex-wrap: wrap;
}
.filter-tabs { display: flex; gap: 2px; }
.filter-tab {
    padding: 6px 14px; border-radius: 999px;
    font-size: .8125rem; font-weight: 500; color: var(--color-text-2);
    background: transparent; border: 1px solid transparent;
    cursor: pointer; transition: all var(--transition);
    display: inline-flex; align-items: center; gap: 6px;
}
.filter-tab:hover { background: var(--color-surface); border-color: var(--color-border); }
.filter-tab.active { background: var(--color-text); color: #fff; border-color: var(--color-text); }
.filter-tab.active .tab-count { opacity: .7; }
.tab-count { font-size: .6875rem; font-weight: 600; }

.search-box {
    position: relative; flex: 0 1 280px;
}
.search-icon {
    position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
    width: 16px; height: 16px; color: var(--color-text-3); pointer-events: none;
}
.search-box input {
    width: 100%; padding: 7px 12px 7px 34px;
    border: 1px solid var(--color-border); border-radius: 999px;
    font-size: .8125rem; font-family: inherit; background: var(--color-surface);
    color: var(--color-text); outline: none; transition: border-color var(--transition);
}
.search-box input::placeholder { color: var(--color-text-3); }
.search-box input:focus { border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(79,70,229,.1); }

/* --- Content Grid --- */
.content-grid-wrapper { max-width: var(--max-w); margin: 0 auto; padding: 32px 24px 48px; }
.content-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 640px) { .content-grid { grid-template-columns: repeat(2, 1fr); } }

.no-results { text-align: center; padding: 48px 0; color: var(--color-text-3); }
.no-results[hidden] { display: none; }

/* --- Card --- */
.card {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius); overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); border-color: var(--color-border-2); transform: translateY(-1px); }
.card[hidden] { display: none; }
.card-link { display: block; text-decoration: none; color: inherit; }

.card-thumb { position: relative; aspect-ratio: 16/9; background: #e2e8f0; overflow: hidden; }
.card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 300ms ease; }
.card:hover .card-thumb img { transform: scale(1.02); }
.card-duration {
    position: absolute; bottom: 8px; right: 8px;
    background: rgba(0,0,0,.75); color: #fff;
    font-size: .6875rem; font-weight: 600; font-family: var(--font-mono);
    padding: 2px 6px; border-radius: 4px;
}

.card-body { padding: 16px; }
.card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.card-meta-inline { font-size: .6875rem; color: var(--color-text-3); }
.card-title { font-size: .9375rem; font-weight: 600; line-height: 1.35; letter-spacing: -.01em; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; font-size: .75rem; color: var(--color-text-3); }
.card-meta span { display: inline-flex; align-items: center; }
.card-tldr { margin-top: 10px; font-size: .8125rem; color: var(--color-text-2); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-tldr p { margin: 0; }

/* --- Type Badge --- */
.type-badge {
    display: inline-block; font-size: .625rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: .06em; padding: 3px 8px; border-radius: 999px;
}
.type-badge.video { background: var(--color-video); color: var(--color-video-text); }
.type-badge.document { background: var(--color-doc); color: var(--color-doc-text); }

/* ============================================================
   Article (content detail page)
   ============================================================ */

/* --- Breadcrumb --- */
.breadcrumb {
    max-width: var(--max-w); margin: 0 auto; padding: 16px 24px;
    display: flex; align-items: center; gap: 4px;
    font-size: .8125rem; color: var(--color-text-3);
}
.breadcrumb a { color: var(--color-text-2); font-weight: 500; }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb svg { width: 14px; height: 14px; flex-shrink: 0; }

/* --- Article Header --- */
.article-header {
    max-width: var(--max-w-prose); margin: 0 auto; padding: 24px 24px 32px;
}
.article-header h1 {
    font-size: clamp(1.375rem, 3.5vw, 1.75rem); font-weight: 700;
    letter-spacing: -.02em; line-height: 1.25; margin: 12px 0 16px;
}
.article-meta {
    list-style: none; display: flex; flex-wrap: wrap; gap: 6px 16px;
    font-size: .8125rem; color: var(--color-text-2);
}
.article-meta li { display: inline-flex; align-items: center; }
.article-meta li + li::before { content: none; }
.btn-original {
    display: inline-flex; align-items: center; gap: 6px;
    margin-top: 16px; padding: 8px 16px;
    border: 1px solid var(--color-border); border-radius: var(--radius-sm);
    font-size: .8125rem; font-weight: 500; color: var(--color-text-2);
    background: var(--color-surface); box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.btn-original svg { width: 14px; height: 14px; }
.btn-original:hover { border-color: var(--color-accent); color: var(--color-accent); box-shadow: var(--shadow); }

/* --- Callout boxes (TLDR, digest) --- */
.callout {
    max-width: var(--max-w-prose); margin: 0 auto 24px; padding: 20px 24px;
    border-radius: var(--radius); border-left: 4px solid;
}
.callout-label { font-size: .6875rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px; }
.callout-tldr { background: var(--color-tldr-bg); border-color: var(--color-tldr-border); }
.callout-tldr .callout-label { color: #0369a1; }
.callout-digest { background: var(--color-digest-bg); border-color: var(--color-digest-border); }
.callout-digest .callout-label { color: #b45309; }

/* --- Article Layout (TOC + Body) --- */
.article-layout {
    max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
    display: grid; grid-template-columns: 1fr; gap: 32px;
}
@media (min-width: 860px) {
    .article-layout { grid-template-columns: 200px 1fr; }
}

/* --- Table of Contents --- */
.toc { order: 2; }
@media (min-width: 860px) { .toc { order: 0; } }

.toc-inner { position: sticky; top: 80px; }
.toc-heading { display: block; font-size: .6875rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--color-text-3); margin-bottom: 10px; }
.toc-nav { display: flex; flex-direction: column; gap: 2px; }
.toc-link {
    font-size: .8125rem; color: var(--color-text-2); padding: 4px 10px;
    border-radius: var(--radius-sm); border-left: 2px solid transparent;
    transition: all var(--transition); line-height: 1.4;
}
.toc-link:hover { color: var(--color-text); background: rgba(0,0,0,.03); }
.toc-link.active { color: var(--color-accent); border-left-color: var(--color-accent); background: var(--color-accent-bg); font-weight: 500; }

/* --- Article Body --- */
.article-body { max-width: var(--max-w-prose); min-width: 0; }
.article-section { margin-bottom: 40px; scroll-margin-top: 80px; }
.article-section h2 {
    font-size: 1.125rem; font-weight: 650; letter-spacing: -.01em;
    padding-bottom: 10px; margin-bottom: 14px;
    border-bottom: 1px solid var(--color-border);
}

/* --- Article Footer --- */
.article-footer {
    max-width: var(--max-w-prose); margin: 48px auto 0; padding: 16px 24px;
    border-top: 1px solid var(--color-border);
}
.gen-meta { display: flex; flex-wrap: wrap; gap: 16px; font-size: .75rem; color: var(--color-text-3); }

/* ============================================================
   Prose — rendered HTML from the LLM
   ============================================================ */
.prose { font-size: .9375rem; line-height: 1.7; color: var(--color-text); }
.prose p { margin-bottom: 12px; }
.prose p:last-child { margin-bottom: 0; }
.prose ul, .prose ol { margin-bottom: 12px; padding-left: 24px; }
.prose li { margin-bottom: 4px; }
.prose li::marker { color: var(--color-text-3); }
.prose strong { font-weight: 600; }
.prose a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
.prose a:hover { text-decoration-thickness: 2px; }
.prose h3 { font-size: 1rem; font-weight: 600; margin: 20px 0 8px; }
.prose h4 { font-size: .9375rem; font-weight: 600; margin: 16px 0 6px; }
.prose blockquote { border-left: 3px solid var(--color-border-2); padding-left: 16px; color: var(--color-text-2); margin: 12px 0; font-style: italic; }

.prose table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: .875rem; }
.prose th, .prose td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--color-border); }
.prose th { font-weight: 600; background: var(--color-bg); font-size: .8125rem; }
.prose tr:hover td { background: rgba(0,0,0,.015); }

.prose code { font-family: var(--font-mono); font-size: .85em; background: var(--color-bg); padding: 2px 5px; border-radius: 4px; }
.prose pre { background: var(--color-text); color: #e2e8f0; padding: 16px 20px; border-radius: var(--radius-sm); overflow-x: auto; margin: 16px 0; font-size: .8125rem; line-height: 1.6; }
.prose pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 639px) {
    .toolbar-inner { flex-direction: column; align-items: stretch; }
    .search-box { flex: 1 1 100%; }
    .filter-tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 2px; }
    .card-body { padding: 12px; }
    .card-title { font-size: .875rem; }
    .hero { padding-top: 32px; }
    .hero h1 { font-size: 1.375rem; }
    .article-header { padding: 16px 16px 24px; }
    .article-layout { padding: 0 16px; }
    .callout { margin-left: 16px; margin-right: 16px; }
    .breadcrumb { padding: 12px 16px; }
    .article-footer { padding: 16px; }
    .content-grid-wrapper { padding: 20px 16px 40px; }
}

/* --- Print --- */
@media print {
    .site-header, .site-footer, .toolbar, .toc, .btn-original, .breadcrumb { display: none; }
    body { background: #fff; font-size: 12pt; }
    .article-layout { display: block; }
    .article-header, .callout, .article-body, .article-footer { max-width: 100%; padding: 0; margin: 0 0 16pt; }
    .card { break-inside: avoid; }
    .content-grid { display: block; }
    .card + .card { margin-top: 12pt; }
    a { color: inherit; text-decoration: underline; }
}

/* --- Raw comment / chat pages (Phase 4) --- */
.raw-comments { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.raw-comment { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 16px 18px; }
.raw-comment-pinned { background: #fffbeb; border-color: #fcd34d; }
.raw-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: .75rem; color: var(--color-text-3); margin-bottom: 6px; }
.raw-author { font-weight: 600; color: var(--color-text-2); }
.raw-date { margin-left: auto; }
.raw-text { font-size: .95rem; color: var(--color-text); white-space: pre-line; overflow-wrap: break-word; }
.raw-tag { display: inline-flex; align-items: center; font-size: .625rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; padding: 2px 6px; border-radius: 4px; }
.raw-tag-pinned { background: #fde68a; color: #92400e; }
.raw-tag-super { background: #d1fae5; color: #065f46; }

.raw-chat { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 3px; font-size: .9rem; }
.raw-chat-item { display: grid; grid-template-columns: 52px 1fr; gap: 10px; padding: 6px 10px; border-radius: var(--radius-sm); }
.raw-chat-superchat { background: #ecfdf5; border: 1px solid #a7f3d0; }
.raw-ts { font-family: var(--font-mono); font-size: .7rem; color: var(--color-text-3); padding-top: 2px; }

.empty { color: var(--color-text-3); padding: 32px 0; text-align: center; }

/* ---------- Rolling project overview ---------- */
.overview-eyebrow { font-size: .6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--color-text-3); margin: 0 0 4px; }
.overview-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: .75rem; color: var(--color-text-3); }
.overview-meta span + span::before { content: "·"; margin-right: 10px; color: var(--color-text-3); }

.overview-card { max-width: 820px; margin: 24px auto 0; padding: 0 24px; }
.overview-card-inner { border: 1px solid var(--color-border); border-radius: var(--radius); background: var(--color-surface, #fff); padding: 20px 22px; box-shadow: var(--shadow-sm, 0 1px 2px rgba(15,23,42,.04)); }
.overview-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 10px; }
.overview-card-body { font-size: .9375rem; line-height: 1.55; color: var(--color-text); }
.overview-card-body p { margin: 0 0 8px; }
.overview-card-body p:last-child { margin-bottom: 0; }
.overview-card-link { display: inline-block; margin-top: 14px; font-size: .8125rem; font-weight: 600; color: var(--color-accent, #4f46e5); text-decoration: none; }
.overview-card-link:hover { text-decoration: underline; }

.overview-tldr { max-width: 820px; margin: 24px auto 0; padding: 0 24px; }
.overview-tldr h2 { font-size: .8125rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--color-text-3); margin: 0 0 8px; }
.overview-tldr-body { font-size: 1rem; line-height: 1.6; color: var(--color-text); border-left: 3px solid var(--color-accent, #4f46e5); padding-left: 14px; }

.overview-body { max-width: 820px; margin: 32px auto 0; padding: 0 24px; display: flex; flex-direction: column; gap: 28px; }
.overview-section h2 { font-size: 1.125rem; font-weight: 650; margin: 0 0 10px; letter-spacing: -.01em; }
.overview-section-body { font-size: .9375rem; line-height: 1.6; color: var(--color-text); }
.overview-section-body ul { margin: 0 0 0 18px; padding: 0; }
.overview-section-body li { margin-bottom: 6px; }
.overview-section-body p { margin: 0 0 10px; }

.overview-nav { max-width: 820px; margin: 32px auto; padding: 0 24px; }
.overview-nav-link { font-size: .8125rem; color: var(--color-text-2); text-decoration: none; }
.overview-nav-link:hover { color: var(--color-text); }

/* Link back to overview from per-item content pages */
.content-overview-link { max-width: 820px; margin: 0 auto 16px; padding: 0 24px; font-size: .75rem; }
.content-overview-link a { color: var(--color-text-3); text-decoration: none; }
.content-overview-link a:hover { color: var(--color-text-2); }