/* ============================================================
   Update Pulse — Developer Editorial Theme
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Newsreader:ital,wght@0,400;0,500;1,400&display=swap');

/* ── Custom properties ── */
:root {
  --bg: #0f0f1a;
  --surface: #1a1a2e;
  --surface-2: #1f1f35;
  --border: #2a2a3e;
  --text: #e8e6e3;
  --muted: #6b7280;
  --amber: #a8920f;
  --amber-dim: rgba(226, 183, 20, 0.12);

  /* Neutral card accent */
  --card-accent: #9ca3af;
  --card-accent-dim: rgba(156, 163, 175, 0.3);

  /* Impact — subtle differentiation, no bright colors */
  --impact-breaking: #d1d5db;
  --impact-action: #9ca3af;
  --impact-nice: #9ca3af;
  --impact-skip: rgba(156, 163, 175, 0.25);

  --radius: 4px;
  --mono: 'JetBrains Mono', 'Courier New', monospace;
  --serif: 'Newsreader', Georgia, serif;

  --transition-fast: 150ms ease;
  --transition-med: 250ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  padding-bottom: 64px; /* space for sticky footer */
}

/* ── Layout ── */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   HEADER
   ============================================================ */

.site-header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-title {
  font-family: var(--mono);
  font-size: clamp(18px, 3.5vw, 24px);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--amber);
  text-transform: uppercase;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-logo {
  width: 24px;
  height: 24px;
}

.site-sync {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.03em;
  margin-top: 4px;
}

.btn-lock {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  opacity: 0.4;
  transition: opacity var(--transition-fast);
  padding: 6px;
}

.btn-lock:hover {
  opacity: 0.8;
}

.btn-fetch.hidden {
  display: none;
}

.btn-fetch {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--amber);
  background: transparent;
  border: 1px solid var(--amber);
  border-radius: var(--radius);
  padding: 8px 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-fetch:hover {
  background: var(--amber-dim);
}

.btn-fetch:active {
  transform: scale(0.97);
}

.btn-fetch .spinner {
  display: none;
  width: 12px;
  height: 12px;
  border: 1.5px solid transparent;
  border-top-color: var(--amber);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.btn-fetch.loading .spinner {
  display: inline-block;
}

.btn-fetch.loading .icon-refresh {
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   PULSE LINES
   ============================================================ */

.pulse-section {
  margin-bottom: 36px;
}

.header-activity {
  margin: 16px 0 0;
  padding: 0 max(16px, calc((100% - 680px) / 2));
}

.chip-sep {
  color: var(--border);
  font-size: 14px;
  line-height: 28px;
  padding: 0 2px;
}

.section-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);

}

.section-toggle {
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.section-toggle::before {
  content: '▾ ';
  font-size: 9px;
}

details:not([open]) > .section-toggle::before {
  content: '▸ ';
  margin-bottom: 16px;
}

.pulse-chart {
  background: transparent;
  border: none;
  padding: 8px 0 4px;
  overflow: hidden;
}

.pulse-svg {
  width: 100%;
  display: block;
}

/* SVG draw-in animation */
.pulse-line {
  stroke-dasharray: 2000;
  stroke-dashoffset: 2000;
  animation: drawLine 1.2s ease forwards;
}

@keyframes drawLine {
  to { stroke-dashoffset: 0; }
}

.pulse-spike {
  opacity: 0;
  animation: fadeSpike 0.3s ease forwards;
}

@keyframes fadeSpike {
  to { opacity: 1; }
}

/* ============================================================
   FILTER CHIPS
   ============================================================ */

.filter-section {
  margin-bottom: 28px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast);
  user-select: none;
}

/* Chips: inactive = ghost outline, active = subtle fill */
.chip {
  border-color: var(--border);
  color: #4b5563;
  background: transparent;
}

.chip.active {
  background: rgba(156, 163, 175, 0.15);
  border-color: var(--muted);
  color: var(--text);
}

.chip:hover {
  border-color: var(--muted);
  color: var(--muted);
}

/* ============================================================
   FEED
   ============================================================ */

.feed-section {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* Date group header */
.date-group {
  margin-bottom: 24px;
}

.date-label {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.date-cards {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ── Card ── */
.card {
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  display: flex;
  overflow: hidden;
  opacity: 0;
  transform: translateY(8px);
  animation: cardReveal 0.35s ease forwards;
}

@keyframes cardReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stagger via CSS variable set by JS */
.card {
  animation-delay: var(--card-delay, 0ms);
}

/* Left stripe */
.card-stripe {
  width: 3px;
  flex-shrink: 0;
}

/* Impact-based stripe colors */
.card[data-impact="breaking"] .card-stripe { background: var(--impact-breaking); }
.card[data-impact="action needed"] .card-stripe { background: var(--impact-action); }
.card[data-impact="action"] .card-stripe { background: var(--impact-action); }
.card[data-impact="nice to have"] .card-stripe { background: var(--impact-nice); }
.card[data-impact="nice"] .card-stripe { background: var(--impact-nice); }
.card[data-impact="skip"] .card-stripe { background: var(--impact-skip); }
.card .card-stripe { background: var(--impact-nice); } /* fallback */

/* Skip cards — faded */
.card[data-impact="skip"] .card-l1 { color: var(--muted); }
.card[data-impact="skip"] { opacity: 0.5; }
.card[data-impact="skip"] .source-name { color: var(--muted); }

.card-body {
  flex: 1;
  padding: 14px 16px;
  min-width: 0;
}

/* Card header toggle — entire header+L1 is clickable */
.card-header-toggle {
  display: block;
  width: 100%;
  border: none;
  background: none;
  padding: 0;
  cursor: pointer;
  text-align: left;
  color: inherit;
}

.card-header-toggle:hover .card-l1 {
  color: var(--amber);
}

.card-header-toggle:hover .toggle-arrow {
  color: var(--text);
}

.card-header-toggle .toggle-arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
  font-style: normal;
  font-size: 10px;
  color: var(--muted);
}

.card-header-toggle.open .toggle-arrow {
  transform: rotate(90deg);
}

/* Card header row */
.card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.source-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Impact-based dot colors */
.card[data-impact="breaking"] .source-dot { background: var(--impact-breaking); }
.card[data-impact="action needed"] .source-dot { background: var(--impact-action); }
.card[data-impact="action"] .source-dot { background: var(--impact-action); }
.card[data-impact="nice to have"] .source-dot { background: var(--impact-nice); }
.card[data-impact="nice"] .source-dot { background: var(--impact-nice); }
.card[data-impact="skip"] .source-dot { background: var(--impact-skip); }
.card .source-dot { background: var(--card-accent); } /* fallback */

.source-name {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

/* All source names neutral */
.source-name { color: var(--text); }

.version-tag {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 6px;
}

.rel-time {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  margin-left: auto;
}

/* L1 summary */
.card-l1 {
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--text);
  margin-bottom: 10px;
}

/* Toggle links */
.toggle-link {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: none;
  background: none;
  padding: 0;
  transition: color var(--transition-fast);
}

.toggle-link:hover {
  color: var(--text);
}

.toggle-arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
  font-style: normal;
}

.toggle-link.open .toggle-arrow {
  transform: rotate(90deg);
}

/* L2 deep-links */
.l2-link {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px dotted var(--border);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.l2-link:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* Expandable sections */
.expandable {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.35s ease, opacity 0.25s ease, margin-top 0.25s ease;
}

.expandable.open {
  max-height: 800px;
  opacity: 1;
  margin-top: 10px;
}

/* L2 bullets */
.card-l2 {
  padding: 12px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
}

.card-l2 ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.card-l2 li {
  font-family: var(--serif);
  font-size: 0.9rem;
  color: var(--text);
  padding-left: 16px;
  position: relative;
}

.card-l2 li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--muted);
}

/* Bullet groups — each L2 bullet with its own deep dive */
.bullet-group {
  margin-bottom: 6px;
}

.bullet-text {
  font-family: var(--serif);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text);
  padding: 2px 0;
}

.bullet-expandable {
  cursor: pointer;
  transition: color var(--transition-fast);
}

.bullet-expandable:hover {
  color: var(--amber);
}

.bullet-expandable::after {
  content: ' ▸';
  font-size: 9px;
  color: var(--muted);
  transition: transform var(--transition-fast);
}

.bullet-expandable.open::after {
  content: ' ▾';
}

/* Per-bullet deep dive */
.bullet-dive {
  margin: 4px 0 8px 16px;
  padding: 8px 12px;
  border-left: 2px solid var(--border);
}

.bullet-dive p {
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 10px;
}

.source-link {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--amber);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: opacity var(--transition-fast);
}

.source-link:hover {
  opacity: 0.75;
}

/* Card hidden state (filtered out) */
.card.hidden {
  display: none;
}

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

/* ============================================================
   FETCH LOG (SSE output)
   ============================================================ */

.fetch-log {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 20px;
  max-height: 200px;
  overflow-y: auto;
}

.fetch-log.visible {
  display: block;
}

.fetch-log pre {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-word;
}

.fetch-log .log-error {
  color: #ef4444;
}

/* ============================================================
   EMPTY STATE
   ============================================================ */

.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--muted);
}

.empty-state p {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
}

/* ============================================================
   STICKY FOOTER
   ============================================================ */

.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(15, 15, 26, 0.95);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--border);
  z-index: 100;
}

.footer-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-stat {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.footer-sep {
  color: var(--border);
}

.footer-stat span {
  color: var(--text);
}

/* ============================================================
   SCROLLBAR
   ============================================================ */

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--muted);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* ── Load More button ── */
.btn-load-more {
  display: block;
  width: 100%;
  padding: 14px;
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.btn-load-more:hover {
  color: var(--text);
  border-color: var(--muted);
}

@media (max-width: 600px) {
  .container {
    padding: 0 16px;
  }

  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .card-header {
    flex-wrap: wrap;
  }

  .rel-time {
    margin-left: 0;
    width: 100%;
  }

  /* Smaller activity chart on mobile */
  .header-activity {
    padding: 0 8px;
  }

  .pulse-chart {
    padding: 4px 0;
  }

  .pulse-svg {
    max-height: 100px;
  }

  /* Smaller chips on mobile */
  .chip {
    font-size: 10px;
    padding: 4px 10px;
  }

  .chip-row {
    gap: 6px;
  }

  /* Cards tighter on mobile */
  .card-body {
    padding: 10px 12px;
  }

  .card-l1 {
    font-size: 0.95rem;
  }
}