/* ============================================================
   BlinkBox Weekly Logs — Design System
   ============================================================ */

:root {
  color-scheme: dark;

  /* Backgrounds */
  --bg-root:      #060a13;
  --bg-primary:   #0c1120;
  --bg-secondary: #111827;
  --bg-elevated:  #162032;
  --bg-surface:   #1a2540;
  --bg-hover:     #1e2d4a;
  --bg-code:      #0a0f1a;

  /* Text */
  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #64748b;
  --text-faint:     #475569;

  /* Accent */
  --accent:       #3b82f6;
  --accent-hover: #60a5fa;
  --accent-dim:   #1d4ed8;
  --accent-glow:  rgba(59,130,246,.12);

  /* Semantic */
  --green:        #10b981;
  --green-bg:     rgba(16,185,129,.1);
  --amber:        #f59e0b;
  --amber-bg:     rgba(245,158,11,.1);
  --red:          #ef4444;
  --red-bg:       rgba(239,68,68,.1);
  --purple:       #8b5cf6;
  --purple-bg:    rgba(139,92,246,.1);
  --cyan:         #06b6d4;
  --cyan-bg:      rgba(6,182,212,.1);
  --orange:       #f97316;
  --orange-bg:    rgba(249,115,22,.1);
  --pink:         #ec4899;
  --pink-bg:      rgba(236,72,153,.1);

  /* Border */
  --border:       #1e293b;
  --border-hover: #334155;
  --border-focus: var(--accent);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;

  /* Radius */
  --r-sm:  6px;
  --r-md:  10px;
  --r-lg:  14px;
  --r-xl:  20px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,.35);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.45);
  --shadow-glow: 0 0 20px var(--accent-glow);

  /* Transitions */
  --ease: cubic-bezier(.4,0,.2,1);
}

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

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-sans);
  background: var(--bg-root);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

img, video, iframe { max-width: 100%; display: block; border-radius: var(--r-md); }
a { color: var(--accent); text-decoration: none; transition: color .15s var(--ease); }
a:hover { color: var(--accent-hover); }

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* ============================================================
   Layout
   ============================================================ */
.page-wrapper {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Top Navigation Bar ---- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6,10,19,.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}

.topbar-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 16px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.weekly-session-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  max-width: min(420px, 50vw);
}

.weekly-session-bar .weekly-session-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.weekly-session-bar .btn-lock {
  flex-shrink: 0;
  padding: 6px 12px;
  font-size: 12px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  font-family: inherit;
}

.weekly-session-bar .btn-lock:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

/* PIN gate (index when locked) */
.pin-gate {
  max-width: 440px;
  margin: 48px auto 80px;
  padding: 0 20px;
}

.pin-gate-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px 28px 24px;
  box-shadow: var(--shadow-md);
}

.pin-gate-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pin-gate-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.5;
}

.pin-gate label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 6px;
  margin-top: 14px;
}

.pin-gate label:first-of-type {
  margin-top: 0;
}

.pin-gate input[type="password"],
.pin-gate input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 15px;
  font-family: inherit;
}

.pin-gate input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.pin-gate-error {
  color: var(--red);
  font-size: 13px;
  margin-top: 12px;
  min-height: 1.2em;
}

.pin-gate .btn-unlock {
  margin-top: 20px;
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--r-md);
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  font-family: inherit;
}

.pin-gate .btn-unlock:hover {
  background: var(--accent-hover);
}

.weekly-main-content.is-hidden {
  display: none !important;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text-primary);
  white-space: nowrap;
}

.topbar-brand svg { flex-shrink: 0; }

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  padding: 6px 14px;
  border-radius: var(--r-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all .15s var(--ease);
  white-space: nowrap;
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-elevated); }
.nav-link.active { color: var(--accent); background: var(--accent-glow); }

/* ---- Breadcrumb ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  padding: 16px 0 4px;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { opacity: .4; }

/* ============================================================
   Tags / Badges
   ============================================================ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .02em;
  text-transform: uppercase;
  white-space: nowrap;
  line-height: 1.5;
}

.tag-completed  { background: var(--green-bg);  color: var(--green);  border: 1px solid rgba(16,185,129,.2); }
.tag-in-progress{ background: var(--accent-glow); color: var(--accent); border: 1px solid rgba(59,130,246,.2); }
.tag-warning    { background: var(--amber-bg);  color: var(--amber);  border: 1px solid rgba(245,158,11,.2); }
.tag-critical   { background: var(--red-bg);    color: var(--red);    border: 1px solid rgba(239,68,68,.2); }
.tag-new        { background: var(--purple-bg); color: var(--purple); border: 1px solid rgba(139,92,246,.2); }
.tag-enhancement{ background: var(--cyan-bg);   color: var(--cyan);   border: 1px solid rgba(6,182,212,.2); }
.tag-bug        { background: var(--orange-bg); color: var(--orange); border: 1px solid rgba(249,115,22,.2); }
.tag-note       { background: rgba(100,116,139,.1); color: var(--text-secondary); border: 1px solid rgba(100,116,139,.2); }
.tag-feature    { background: var(--pink-bg);   color: var(--pink);   border: 1px solid rgba(236,72,153,.2); }

/* ============================================================
   Callout / Alert Boxes
   ============================================================ */
.callout {
  border-radius: var(--r-md);
  padding: 16px 20px;
  margin: 16px 0;
  border-left: 4px solid;
  font-size: 14px;
  line-height: 1.6;
}
.callout-title {
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.callout-note     { background: var(--accent-glow); border-color: var(--accent); }
.callout-note .callout-title { color: var(--accent); }

.callout-warning  { background: var(--amber-bg); border-color: var(--amber); }
.callout-warning .callout-title { color: var(--amber); }

.callout-critical { background: var(--red-bg); border-color: var(--red); }
.callout-critical .callout-title { color: var(--red); }

.callout-tip      { background: var(--green-bg); border-color: var(--green); }
.callout-tip .callout-title { color: var(--green); }

.callout-important { background: var(--purple-bg); border-color: var(--purple); }
.callout-important .callout-title { color: var(--purple); }

/* ============================================================
   Content Typography
   ============================================================ */
.content { font-size: 15px; line-height: 1.7; color: var(--text-primary); }

.content h1 { font-size: 28px; font-weight: 800; margin: 32px 0 12px; letter-spacing: -.02em; }
.content h2 { font-size: 22px; font-weight: 700; margin: 28px 0 10px; letter-spacing: -.01em; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.content h3 { font-size: 18px; font-weight: 650; margin: 24px 0 8px; }
.content h4 { font-size: 15px; font-weight: 650; margin: 20px 0 6px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .04em; }

.content p { margin: 10px 0; }
.content ul, .content ol { margin: 8px 0 12px 20px; }
.content li { margin: 4px 0; }
.content li::marker { color: var(--text-faint); }

.content strong { font-weight: 650; color: var(--text-primary); }
.content em { font-style: italic; color: var(--text-secondary); }

.content hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 28px 0;
}

.content code {
  font-family: var(--font-mono);
  font-size: .88em;
  background: var(--bg-code);
  border: 1px solid var(--border);
  padding: 2px 7px;
  border-radius: 5px;
  color: var(--cyan);
}

.content pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 18px 20px;
  overflow-x: auto;
  margin: 14px 0;
  line-height: 1.55;
}
.content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 13px;
  color: var(--text-secondary);
}

.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 14px;
}
.content th {
  text-align: left;
  padding: 10px 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-weight: 650;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--text-secondary);
}
.content td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  vertical-align: top;
}
.content tr:hover td { background: rgba(255,255,255,.02); }

.content a { color: var(--accent); }
.content a:hover { color: var(--accent-hover); text-decoration: underline; }

/* File tree */
.content .tree { color: var(--text-secondary); }

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.card-hover:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--r-sm);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .15s var(--ease);
  font-family: var(--font-sans);
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); color: #fff; }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-elevated); color: var(--text-primary); border-color: var(--border-hover); }

/* ============================================================
   Search Input
   ============================================================ */
.search-wrapper {
  position: relative;
}
.search-wrapper svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}
.search-input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  outline: none;
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
.search-input::placeholder { color: var(--text-muted); }
.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ============================================================
   Media Containers (future-ready)
   ============================================================ */
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin: 16px 0;
}
.media-item {
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-primary);
}
.media-item img, .media-item video { width: 100%; display: block; }
.media-caption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text-secondary);
}

.video-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  margin: 16px 0;
}
.video-embed iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: 0;
}

/* ============================================================
   References
   ============================================================ */
.ref-list {
  list-style: none;
  padding: 0;
  margin: 12px 0;
}
.ref-list li {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  margin-bottom: 8px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background .15s var(--ease);
}
.ref-list li:hover { background: var(--bg-elevated); }
.ref-icon { flex-shrink: 0; color: var(--text-muted); }

/* ============================================================
   Table of Contents (Sidebar)
   ============================================================ */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 32px;
  padding: 24px 0 60px;
  align-items: start;
}
.page-content { min-width: 0; }

.toc {
  position: sticky;
  top: 84px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg-secondary);
}
.toc-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.toc-list { list-style: none; }
.toc-list a {
  display: block;
  padding: 5px 0;
  font-size: 13px;
  color: var(--text-secondary);
  border-left: 2px solid transparent;
  padding-left: 12px;
  transition: all .15s var(--ease);
}
.toc-list a:hover { color: var(--accent); border-left-color: var(--accent); }
.toc-list a.active { color: var(--accent); border-left-color: var(--accent); }
.toc-list .toc-h3 { padding-left: 24px; font-size: 12px; }

/* ============================================================
   Diff Viewer
   ============================================================ */
.diff-tree { font-family: var(--font-mono); font-size: 13px; line-height: 1.8; }
.diff-added { color: var(--green); }
.diff-added::before { content: '+ '; }
.diff-removed { color: var(--red); text-decoration: line-through; opacity: .7; }
.diff-removed::before { content: '- '; }
.diff-modified { color: var(--amber); }
.diff-modified::before { content: '~ '; }
.diff-unchanged { color: var(--text-muted); }

.diff-select {
  padding: 10px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  outline: none;
  cursor: pointer;
}
.diff-select:focus { border-color: var(--accent); }

/* ============================================================
   Hub / Index Page
   ============================================================ */
.hero {
  text-align: center;
  padding: 56px 20px 36px;
}
.hero-title {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -.03em;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  color: var(--text-secondary);
  font-size: 16px;
  margin-top: 8px;
}

.stats-bar {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin: 24px 0 32px;
  flex-wrap: wrap;
}
.stat {
  text-align: center;
}
.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
}
.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 16px 0 24px;
  justify-content: center;
}
.filter-btn {
  padding: 6px 14px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all .15s var(--ease);
}
.filter-btn:hover { border-color: var(--border-hover); color: var(--text-primary); }
.filter-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.week-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 20px;
  padding-bottom: 60px;
}

.week-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px;
  cursor: pointer;
  transition: all .2s var(--ease);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}
.week-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow), var(--shadow-md);
  transform: translateY(-2px);
  color: inherit;
}

.week-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.week-number {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.week-card-title {
  font-size: 18px;
  font-weight: 700;
  margin: 2px 0 8px;
  line-height: 1.3;
}
.week-card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
  flex: 1;
}
.week-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.week-card-date {
  font-size: 12px;
  color: var(--text-muted);
}
.week-card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.sub-page-list {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.sub-page-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: 13px;
  color: var(--text-secondary);
}
.sub-page-link:hover { color: var(--accent); }

/* No results */
.no-results {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 15px;
}

/* ============================================================
   Page Header (Week Pages)
   ============================================================ */
.page-hero {
  padding: 32px 0 24px;
}
.page-hero-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.2;
  margin-bottom: 12px;
}
.page-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-secondary);
}
.page-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.page-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.week-nav {
  display: flex;
  justify-content: space-between;
  padding: 32px 0 16px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}
.week-nav a {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  transition: all .15s var(--ease);
}
.week-nav a:hover { border-color: var(--accent); color: var(--accent); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  text-align: center;
  padding: 32px 20px;
  font-size: 13px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .page-layout { grid-template-columns: 1fr; }
  .toc { display: none; }
  .week-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 28px; }
  .page-hero-title { font-size: 26px; }
}

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.animate-in {
  animation: fadeInUp .35s var(--ease) both;
}

/* Staggered children */
.stagger > * { animation: fadeInUp .35s var(--ease) both; }
.stagger > *:nth-child(1) { animation-delay: .05s; }
.stagger > *:nth-child(2) { animation-delay: .1s; }
.stagger > *:nth-child(3) { animation-delay: .15s; }
.stagger > *:nth-child(4) { animation-delay: .2s; }
.stagger > *:nth-child(5) { animation-delay: .25s; }
.stagger > *:nth-child(6) { animation-delay: .3s; }
.stagger > *:nth-child(7) { animation-delay: .35s; }
.stagger > *:nth-child(8) { animation-delay: .4s; }