/* ============================================================
   AI Creative Daily — v4 "Intelligence Briefing"
   Dark editorial aesthetic · Warm amber accent
   Bloomberg Terminal meets Monocle magazine
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=IBM+Plex+Mono:wght@400;500;600&display=swap");

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

/* --- Tokens ------------------------------------------------ */
:root {
  --bg: #0c0c0e;
  --bg-surface: #141416;
  --bg-elevated: #1c1c20;
  --bg-hover: #222228;
  --text: #e8e6e3;
  --text-secondary: #9e9a93;
  --text-muted: #5c5955;
  --border: #2a2a2e;
  --border-subtle: #1e1e22;
  --accent: #e2a84b;
  --accent-dim: #b8862e;
  --accent-glow: rgba(226, 168, 75, 0.08);
  --green: #5cb870;
  --green-dim: rgba(92, 184, 112, 0.12);
  --red: #d66853;
  --blue: #5b9bd5;

  --font-display: "Libre Baskerville", "Noto Serif TC", Georgia, serif;
  --font-body: "DM Sans", "Noto Sans TC", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", monospace;
  --max-w: 740px;
}

/* Light mode override */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f2ed;
    --bg-surface: #ffffff;
    --bg-elevated: #f0ede7;
    --bg-hover: #e8e5df;
    --text: #1a1815;
    --text-secondary: #5c5850;
    --text-muted: #9e9a93;
    --border: #d8d4cc;
    --border-subtle: #e8e5df;
    --accent: #c47a1a;
    --accent-dim: #a66310;
    --accent-glow: rgba(196, 122, 26, 0.06);
    --green: #2d8a4e;
    --green-dim: rgba(45, 138, 78, 0.08);
    --red: #c4513a;
    --blue: #2d6db5;
  }
}

/* --- Base -------------------------------------------------- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main,
footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

/* --- Accessibility ----------------------------------------- */
/* Skip link: hidden until focused via Tab key. Keyboard users can
   jump past the header/tabs directly to main content. */
.skip-link {
  position: absolute;
  top: -48px;
  left: 0;
  background: var(--accent);
  color: var(--bg);
  padding: 0.5rem 1rem;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  z-index: 200;
  border-radius: 0 0 3px 0;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--text);
  outline-offset: -2px;
}

/* Keyboard-visible focus ring on interactive elements. Using
   :focus-visible so mouse clicks don't draw the ring (browsers
   decide). Overrides browser defaults which are hard to see on
   the dark palette. */
a:focus-visible,
button:focus-visible,
[role="tab"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Respect users who've asked for less motion. Targets the specific
   elements with animations/transitions rather than using a universal
   `* { ... !important }` override, so we stay lint-clean. */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .tab-panel {
    animation: none;
  }
  a,
  .tab,
  .idea-card,
  .filter-btn,
  .pulse-btn,
  .skip-link {
    transition: none;
  }
}

/* --- Header ------------------------------------------------ */
header {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 2rem 0 0;
  margin-bottom: 0;
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem 1.25rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

header h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1;
}

header h1 span.dot {
  color: var(--accent);
}

header time {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* --- Tab Navigation ---------------------------------------- */
.tab-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}

.tab-bar-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
}

.tab {
  flex: 1 1 0;
  text-align: center;
  padding: 0.85rem 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition:
    color 0.2s,
    border-color 0.2s;
  position: relative;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tab:hover {
  color: var(--text-secondary);
  text-decoration: none;
}

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* --- Tab Panels -------------------------------------------- */
.tab-panel {
  display: none;
  animation: panelIn 0.25s ease-out;
}

.tab-panel.active {
  display: block;
}

@keyframes panelIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Section Headers --------------------------------------- */
section {
  padding: 2rem 0 2.5rem;
}

section > h2 {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

/* --- Typography -------------------------------------------- */
h3 {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

p {
  margin-bottom: 0.85rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

p:last-child {
  margin-bottom: 0;
}

strong {
  color: var(--text);
  font-weight: 600;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}
a:hover {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 2px;
}

code {
  font-family: var(--font-mono);
  font-size: 0.82em;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.12em 0.4em;
  border-radius: 2px;
  border: 1px solid var(--border-subtle);
}

/* --- Idea Cards -------------------------------------------- */
.idea-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  transition:
    border-color 0.2s,
    background 0.2s;
}

.idea-card:hover {
  border-color: var(--accent-dim);
  background: var(--bg-elevated);
}

.idea-card h3 {
  font-size: 0.92rem;
  padding-bottom: 0.6rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px dashed var(--border-subtle);
  line-height: 1.6;
}

.idea-card p {
  font-size: 0.88rem;
  line-height: 1.7;
}

.idea-card ul {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.65rem;
}

.idea-card li {
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding: 0.2rem 0 0.2rem 1.2rem;
  position: relative;
}

.idea-card li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent-dim);
  font-weight: 600;
}

/* --- Shipped List ------------------------------------------ */
.shipped-list {
  list-style: none;
  padding: 0;
  counter-reset: shipped;
}

.shipped-list > li {
  counter-increment: shipped;
  padding: 0.85rem 0 0.85rem 0;
  border-bottom: 1px solid var(--border-subtle);
  line-height: 1.6;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.15rem;
}

.shipped-list > li:last-child {
  border-bottom: none;
}

/* --- Source Color Dots ------------------------------------- */
/* Default dot (applied via .shipped-list > li::before) is neutral. */
/* .source-rss gets a green accent; other source slugs are not emitted
   cleanly by the agent (it sends display strings like "GitHub Trending #1"
   which HTML splits into multiple classes), so we don't style them. */
.shipped-list > li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  margin-right: 0.5rem;
  vertical-align: middle;
  flex-shrink: 0;
  background: var(--text-muted);
}

/* --- Severity Badges --------------------------------------- */
.severity {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  padding: 0.1em 0.45em;
  border-radius: 2px;
  margin-left: 0.4rem;
  vertical-align: middle;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.severity-critical {
  background: rgba(214, 104, 83, 0.15);
  color: var(--red);
}

.severity-high {
  background: rgba(226, 168, 75, 0.12);
  color: var(--accent);
}

/* --- Language Tag & Time Ago ------------------------------- */
.lang-tag {
  font-size: 0.7rem;
  padding: 0.1em 0.35em;
  margin-left: 0.3rem;
}

.time-ago {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-left: 0.3rem;
}

/* --- Local Context ----------------------------------------- */
.local-context {
  display: block;
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
  padding-left: 0.5rem;
  border-left: 2px solid var(--accent-dim);
  font-style: italic;
  line-height: 1.6;
}

.score {
  display: inline;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--green);
  background: var(--green-dim);
  padding: 0.1em 0.5em;
  border-radius: 2px;
  vertical-align: middle;
  margin-left: 0.3rem;
  white-space: nowrap;
}

.takeaway {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* --- Sub Section Title ------------------------------------- */
.sub-section-title {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  margin: 2.25rem 0 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.sub-section-title:first-child {
  margin-top: 0;
}

/* Generic section h3 (fallback styling) */
section h3:not(.topic-header):not(.sub-section-title) {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  margin: 1.5rem 0 0.5rem;
  text-transform: none;
  letter-spacing: 0;
}

li.source-rss::before {
  background: var(--green);
}

/* --- Pulse Toggle ------------------------------------------ */
.pulse-toggle {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  width: fit-content;
}

.pulse-btn {
  padding: 0.5rem 1.25rem;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-surface);
  border: none;
  cursor: pointer;
  transition: all 0.15s;
}

.pulse-btn + .pulse-btn {
  border-left: 1px solid var(--border);
}

.pulse-btn.active {
  color: var(--bg);
  background: var(--accent);
}

.pulse-btn:hover:not(.active) {
  color: var(--text);
  background: var(--bg-hover);
}

.pulse-mode {
  display: none;
}
.pulse-mode.active {
  display: block;
}

/* --- Source Filter ------------------------------------------ */
.source-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
}

.filter-btn {
  padding: 0.35rem 0.75rem;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s;
}

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

.filter-btn:hover:not(.active) {
  color: var(--text);
  border-color: var(--text-muted);
}

.filter-group.hidden {
  display: none;
}

.relevance-tag {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 600;
  color: var(--green);
  background: var(--green-dim);
  padding: 0.1em 0.4em;
  border-radius: 2px;
  margin-left: 0.3rem;
  vertical-align: middle;
}

.rss-feed-tag {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-elevated);
  padding: 0.1em 0.4em;
  border-radius: 2px;
  margin-left: 0.3rem;
  vertical-align: middle;
}

/* --- Signal Sources ---------------------------------------- */
.signal-sources {
  margin-top: 0.75rem;
  padding: 0.6rem 0.85rem;
  background: var(--bg-elevated);
  border-radius: 3px;
  border: 1px solid var(--border-subtle);
  font-size: 0.78rem;
}

.signal-sources strong {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.4rem;
}

.signal-sources ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.signal-sources li {
  padding: 0.2rem 0;
  line-height: 1.5;
}

.signal-sources li a {
  font-size: 0.78rem;
}

/* --- Signal Section ---------------------------------------- */
.prediction {
  margin: 1rem 0 0.6rem;
  padding: 0.85rem 1.1rem;
  background: var(--bg-elevated);
  border-left: 3px solid var(--accent-dim);
  border-radius: 0 3px 3px 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.prediction + .prediction {
  margin-top: 0.5rem;
}

.prediction strong {
  color: var(--accent);
}

/* --- Arc Badge & Prediction Status ------------------------- */
.arc-badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--blue);
  background: rgba(91, 155, 213, 0.1);
  padding: 0.1em 0.45em;
  border-radius: 2px;
  margin-left: 0.4rem;
}

.pred-status {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  padding: 0.1em 0.45em;
  border-radius: 2px;
  margin-left: 0.4rem;
}

.pred-pending {
  background: rgba(226, 168, 75, 0.12);
  color: var(--accent);
}
.pred-confirmed {
  background: var(--green-dim);
  color: var(--green);
}
.pred-failed {
  background: rgba(214, 104, 83, 0.12);
  color: var(--red);
}
.pred-needs_revision {
  background: rgba(91, 155, 213, 0.1);
  color: var(--blue);
}

/* --- Signal Card ------------------------------------------- */
.signal-card {
  padding: 1rem 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-bottom: 1.5rem;
}

.signal-card.lead-card {
  padding: 1.5rem 1.5rem;
  border-left: 3px solid var(--accent);
}
.lead-body h4,
.lead-body strong {
  color: var(--accent);
}
.lead-body h4 {
  font-size: 1.05rem;
  margin: 1.25rem 0 0.5rem;
  font-family: var(--font-heading);
}
.lead-body p {
  margin-bottom: 0.75rem;
  line-height: 1.75;
}
.lead-body ul,
.lead-body ol {
  margin: 0.5rem 0 0.75rem 1.25rem;
}
.lead-body li {
  margin-bottom: 0.35rem;
}

.signal-card.sleeper {
  border-left: 3px solid var(--green);
}
.signal-card.contrarian {
  border-left: 3px solid var(--red);
}

.signal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border-subtle);
}

.signal-meta span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  padding: 0.15em 0.5em;
  border-radius: 2px;
}

.signal-type {
  background: rgba(91, 155, 213, 0.1);
  color: var(--blue);
}
.signal-xsrc {
  background: var(--green-dim);
  color: var(--green);
}
.signal-pct {
  background: var(--bg-elevated);
  color: var(--text-muted);
}

.signal-strength {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  padding: 0.1em 0.45em;
  border-radius: 2px;
  margin-left: 0.4rem;
  vertical-align: middle;
}

.signal-強訊號 {
  background: rgba(214, 104, 83, 0.15);
  color: var(--red);
}
.signal-弱訊號 {
  background: rgba(226, 168, 75, 0.12);
  color: var(--accent);
}

.signal-evidence {
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 0.5rem 0.75rem;
  background: var(--bg-elevated);
  border-radius: 3px;
  margin-top: 0.5rem;
  line-height: 1.6;
}

/* --- Section Intro ----------------------------------------- */
.section-intro {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-style: italic;
}

/* --- Footer ------------------------------------------------ */
footer {
  margin-top: 1rem;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.sources {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

.source-status {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 0.15em 0.5em;
  border-radius: 2px;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.source-status.ok {
  background: var(--green-dim);
  color: var(--green);
}

.source-status.warn {
  background: rgba(214, 104, 83, 0.15);
  color: var(--red);
}

footer nav.archive {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0;
}

footer nav.archive a {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  padding: 0.2em 0.55em;
  border: 1px solid var(--border);
  border-radius: 2px;
  letter-spacing: 0.03em;
}

footer nav.archive a:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
}

footer .powered-by {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  opacity: 0.4;
  margin-top: 0.75rem;
  letter-spacing: 0.05em;
}

/* --- Quality Indicators ------------------------------------ */
.repo-age {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-muted);
  background: var(--bg-elevated);
  padding: 0.1em 0.4em;
  border-radius: 2px;
  margin-left: 0.3rem;
  vertical-align: middle;
}

.action-item {
  display: block;
  font-size: 0.78rem;
  color: var(--accent);
  margin-top: 0.2rem;
  padding-left: 0.5rem;
  border-left: 2px solid var(--accent-dim);
  line-height: 1.5;
}

.market-evidence {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 0.25rem;
  padding: 0.4rem 0.75rem;
  background: var(--bg-elevated);
  border-radius: 3px;
  border-left: 2px solid var(--green);
}

.product-opp {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--accent-glow);
  border-radius: 3px;
}

/* --- Responsive -------------------------------------------- */
@media (max-width: 640px) {
  body {
    font-size: 14px;
  }
  main,
  footer {
    padding: 0 1rem;
  }
  .header-inner {
    padding: 0 1rem 1rem;
    flex-direction: column;
    gap: 0.25rem;
  }
  .tab {
    font-size: 0.65rem;
    padding: 0.7rem 0.35rem;
    letter-spacing: 0.06em;
  }
  .idea-card {
    padding: 1rem;
  }
  section {
    padding: 1.5rem 0 2rem;
  }
  .idea-card li {
    font-size: 0.85rem;
    padding: 0.3rem 0 0.3rem 1.2rem;
  }
}

/* --- Print ------------------------------------------------- */
@media print {
  :root {
    --bg: #fff;
    --bg-surface: #fff;
    --bg-elevated: #f5f5f5;
    --text: #000;
    --text-secondary: #333;
    --text-muted: #666;
    --border: #ccc;
    --accent: #8b5e00;
  }
  .tab-bar {
    display: none;
  }
  .tab-panel {
    display: block;
  }
  header {
    background: none;
  }
  footer nav.archive,
  footer .powered-by {
    display: none;
  }
  section {
    break-inside: avoid;
  }
}