/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}
body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  font-variant-numeric: tabular-nums lining-nums;
}
img, svg { display: block; max-width: 100%; height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.15; }
p, li { text-wrap: pretty; }
::selection { background: color-mix(in oklab, var(--color-primary) 25%, transparent); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
button { cursor: pointer; background: none; border: none; }
a, button, input, select {
  transition: color var(--transition-interactive), background var(--transition-interactive),
    border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important; scroll-behavior: auto !important;
  }
}

/* ===== Design tokens ===== */
:root, html[data-theme="light"] {
  --color-bg: #f3f6f8;
  --color-surface: #ffffff;
  --color-surface-2: #f9fbfc;
  --color-surface-offset: #edf1f4;
  --color-border: #dde4e9;
  --color-divider: #e6ebee;

  --color-text: #10171e;
  --color-text-muted: #5c6873;
  --color-text-faint: #99a3ac;
  --color-text-inverse: #f7fafb;

  --color-primary: #0e7c86;
  --color-primary-hover: #0a5f68;
  --color-primary-highlight: #d6ecee;

  --topic-ir: #0e7c86;       --topic-ir-bg: #d6ecee;
  --topic-recsys: #b3801f;   --topic-recsys-bg: #f3e6c9;
  --topic-ranking: #1f6fa8;  --topic-ranking-bg: #d9e8f2;
  --topic-ecom: #bb5230;     --topic-ecom-bg: #f2ddd2;
  --topic-llm: #6d43b8;      --topic-llm-bg: #e6dcf5;
  --topic-cloud: #1f8a5f;    --topic-cloud-bg: #d7ecdf;
  --topic-agentops: #a8348c; --topic-agentops-bg: #f5dcef;
  --topic-lang: #4550c2;     --topic-lang-bg: #dfe1f7;
  --topic-swe: #c23b57;      --topic-swe-bg: #f7dbe1;
  --topic-devtools: #5a8f24; --topic-devtools-bg: #e2ecd3;

  --color-success: #3f7d3a;
  --color-success-highlight: #dcebd9;
  --color-new: #c2410c;
  --color-new-bg: #fde3d2;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.9rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 2px oklch(0.2 0.02 220 / 0.06);
  --shadow-md: 0 4px 14px oklch(0.2 0.02 220 / 0.08);

  --content-wide: 1280px;
  --font-display: "Cabinet Grotesk", "General Sans", system-ui, sans-serif;
  --font-body: "Satoshi", "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Geist Mono", ui-monospace, monospace;
}

html[data-theme="dark"] {
  --color-bg: #0a0e13;
  --color-surface: #11161d;
  --color-surface-2: #151b23;
  --color-surface-offset: #192029;
  --color-border: #252e39;
  --color-divider: #1c2530;

  --color-text: #dde5eb;
  --color-text-muted: #8b98a5;
  --color-text-faint: #565f6b;
  --color-text-inverse: #0a0e13;

  --color-primary: #4fd1c8;
  --color-primary-hover: #6fdcd4;
  --color-primary-highlight: #163332;

  --topic-ir: #4fd1c8;       --topic-ir-bg: #133432;
  --topic-recsys: #e0ac4f;   --topic-recsys-bg: #362a12;
  --topic-ranking: #6cb0e8;  --topic-ranking-bg: #16293a;
  --topic-ecom: #e8916b;     --topic-ecom-bg: #3a231a;
  --topic-llm: #b393e8;      --topic-llm-bg: #2c2140;
  --topic-cloud: #5cdb96;    --topic-cloud-bg: #163625;
  --topic-agentops: #e08fcf; --topic-agentops-bg: #3a1f34;
  --topic-lang: #8f97e8;     --topic-lang-bg: #23264a;
  --topic-swe: #e8899f;      --topic-swe-bg: #3a1f26;
  --topic-devtools: #a3d873; --topic-devtools-bg: #263a1a;

  --color-success: #7cbf74;
  --color-success-highlight: #1c2e1a;
  --color-new: #f2905c;
  --color-new-bg: #3a2416;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 14px oklch(0 0 0 / 0.36);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme]) {
    --color-bg: #0a0e13; --color-surface: #11161d; --color-surface-2: #151b23;
    --color-surface-offset: #192029; --color-border: #252e39; --color-divider: #1c2530;
    --color-text: #dde5eb; --color-text-muted: #8b98a5; --color-text-faint: #565f6b;
    --color-text-inverse: #0a0e13;
    --color-primary: #4fd1c8; --color-primary-hover: #6fdcd4; --color-primary-highlight: #163332;
    --topic-ir: #4fd1c8; --topic-ir-bg: #133432;
    --topic-recsys: #e0ac4f; --topic-recsys-bg: #362a12;
    --topic-ranking: #6cb0e8; --topic-ranking-bg: #16293a;
    --topic-ecom: #e8916b; --topic-ecom-bg: #3a231a;
    --topic-llm: #b393e8; --topic-llm-bg: #2c2140;
    --topic-cloud: #5cdb96; --topic-cloud-bg: #163625;
    --topic-agentops: #e08fcf; --topic-agentops-bg: #3a1f34;
    --topic-lang: #8f97e8; --topic-lang-bg: #23264a;
    --topic-swe: #e8899f; --topic-swe-bg: #3a1f26;
    --topic-devtools: #a3d873; --topic-devtools-bg: #263a1a;
    --color-success: #7cbf74; --color-success-highlight: #1c2e1a;
    --color-new: #f2905c; --color-new-bg: #3a2416;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
    --shadow-md: 0 4px 14px oklch(0 0 0 / 0.36);
  }
}

:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.8125rem);
  --text-sm: clamp(0.85rem, 0.8rem + 0.25vw, 0.9375rem);
  --text-base: clamp(0.95rem, 0.9rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.05rem, 1rem + 0.5vw, 1.25rem);
  --text-xl: clamp(1.3rem, 1.1rem + 1vw, 1.9rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
  --space-16: 4rem; --space-20: 5rem;
}

.mono { font-family: var(--font-mono); }

/* ===== Layout shell ===== */
.wrap { max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--color-primary);
  color: var(--color-text-inverse); padding: var(--space-2) var(--space-4); z-index: 100;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

header.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-divider);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); padding-block: var(--space-4); }
.brand { display: flex; align-items: center; gap: var(--space-3); }
.brand-logo { width: 34px; height: 34px; color: var(--color-primary); flex-shrink: 0; }
.brand-text h1 { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; letter-spacing: -0.01em; }
.brand-text p { font-size: var(--text-xs); color: var(--color-text-muted); }
.header-meta { display: flex; align-items: center; gap: var(--space-3); }

.updated-pill {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-full);
  background: var(--color-surface-offset); border: 1px solid var(--color-border);
  font-size: var(--text-xs); color: var(--color-text-muted); white-space: nowrap;
}
.updated-pill strong { color: var(--color-text); font-weight: 600; }
.live-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--color-success);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-success) 25%, transparent);
  flex-shrink: 0;
}

.theme-toggle {
  width: 38px; height: 38px; border-radius: var(--radius-full);
  border: 1px solid var(--color-border); background: var(--color-surface-offset);
  display: grid; place-items: center; color: var(--color-text-muted);
}
.theme-toggle:hover { color: var(--color-primary); border-color: var(--color-primary); }
.theme-toggle svg { width: 18px; height: 18px; }

main { padding-block: var(--space-8) var(--space-20); }
section + section { margin-top: var(--space-10); }

.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-4); }
.section-heading h2 { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; }
.section-heading .hint { font-size: var(--text-xs); color: var(--color-text-faint); }

/* ===== KPI cards ===== */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }
.kpi-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-5); box-shadow: var(--shadow-sm); }
.kpi-label { font-size: var(--text-xs); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: var(--space-2); }
.kpi-value { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; font-variant-numeric: tabular-nums; }
.kpi-sub { font-size: var(--text-xs); color: var(--color-text-faint); margin-top: var(--space-1); }

/* ===== Topic overview cards ===== */
.topic-overview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.topic-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-left: 3px solid var(--topic-accent, var(--color-border));
  border-radius: var(--radius-lg); padding: var(--space-5); box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; gap: var(--space-3);
}
.topic-card-name { display: flex; align-items: center; gap: var(--space-2); font-family: var(--font-display); font-size: var(--text-sm); font-weight: 700; color: var(--color-text); }
.topic-card-name .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--topic-accent); flex-shrink: 0; }
.topic-card-summary { font-size: var(--text-xs); color: var(--color-text-muted); line-height: 1.5; flex-grow: 1; }

@media (max-width: 900px) { .topic-overview-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .topic-overview-grid { grid-template-columns: 1fr; } }

/* ===== Chart + filters row ===== */
.dash-row { display: grid; grid-template-columns: 1.1fr 1.4fr; gap: var(--space-5); align-items: stretch; }
.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-6); box-shadow: var(--shadow-sm); }
.card h3 { font-family: var(--font-display); font-size: var(--text-base); font-weight: 600; margin-bottom: var(--space-2); }
.chart-hint { font-size: var(--text-xs); color: var(--color-text-faint); margin-bottom: var(--space-4); }
.chart-holder { height: 340px; position: relative; }

.filters-card .filter-row { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-4); }
.filters-card .filter-row:last-child { margin-bottom: 0; }

.score-legend { margin-top: var(--space-4); padding-top: var(--space-4); border-top: 1px solid var(--color-divider); }
.score-legend-heading { font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-text-faint); font-weight: 700; margin: 0 0 var(--space-3); }
.score-legend-list { display: flex; flex-direction: column; gap: var(--space-3); margin: 0; }
.score-legend-row dt { display: flex; align-items: center; font-size: var(--text-xs); font-weight: 700; color: var(--color-text); margin-bottom: 2px; }
.score-legend-row dd { margin: 0; font-size: var(--text-xs); color: var(--color-text-muted); line-height: 1.45; }
.score-legend-note { margin: var(--space-3) 0 0; padding-top: var(--space-3); border-top: 1px dashed var(--color-divider); font-size: var(--text-xs); font-style: italic; color: var(--color-text-faint); line-height: 1.45; }
.legend-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: var(--space-2); flex-shrink: 0; background: var(--color-primary); }
.legend-dot-priority {
  width: 16px; height: 8px; border-radius: 3px;
  background: linear-gradient(90deg, var(--color-success) 0%, var(--color-success) 33%, var(--color-primary) 33%, var(--color-primary) 66%, var(--color-text-faint) 66%, var(--color-text-faint) 100%);
}

.chip {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-full);
  border: 1px solid var(--color-border); background: var(--color-surface-offset);
  font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 500;
}
.chip:hover { border-color: var(--color-primary); color: var(--color-text); }
.chip[aria-pressed="true"] { background: var(--color-primary-highlight); border-color: var(--color-primary); color: var(--color-primary); }
.chip .dot { width: 8px; height: 8px; border-radius: 50%; }

.search-sort-row { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.search-input, .sort-select {
  border: 1px solid var(--color-border); background: var(--color-surface-2);
  border-radius: var(--radius-md); padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm); color: var(--color-text);
}
.search-input { flex: 1; min-width: 180px; }
.search-input:focus, .sort-select:focus { outline: 2px solid var(--color-primary); outline-offset: 1px; }

/* ===== Feed ===== */
.feed-subhint { font-size: var(--text-xs); color: var(--color-text-faint); margin-bottom: var(--space-4); margin-top: calc(-1 * var(--space-2)); }
.paper-list { display: flex; flex-direction: column; gap: var(--space-4); }
.paper-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-5) var(--space-6);
  box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: var(--space-3);
}
/* Author-origin `display: flex` above otherwise beats the UA `[hidden]`
   rule regardless of specificity (author > user-agent in cascade origin),
   so JS setting card.hidden = true alone never actually hides it. */
.paper-card[hidden] { display: none; }
.paper-top { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-4); }
.paper-title { font-family: var(--font-display); font-size: var(--text-base); font-weight: 600; line-height: 1.35; }
.paper-title a { color: var(--color-text); text-decoration: none; }
.paper-title a:hover { color: var(--color-primary); text-decoration: underline; }
.badges { display: flex; gap: var(--space-2); flex-shrink: 0; }
.badge-new { background: var(--color-new-bg); color: var(--color-new); font-size: var(--text-xs); font-weight: 700; padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); letter-spacing: 0.03em; white-space: nowrap; }
.paper-authors { font-size: var(--text-sm); color: var(--color-text-muted); }

.paper-summary { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.55; }
.paper-summary-bullets { margin: 0; padding-left: 1.1em; display: flex; flex-direction: column; gap: var(--space-1); }
.paper-summary-bullets li { padding-left: var(--space-1); }

/* ===== Priority block ===== */
.priority-block {
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-3) var(--space-4); border-radius: var(--radius-md);
  background: var(--color-surface-2); border: 1px solid var(--color-divider); flex-wrap: wrap;
}
.priority-score { display: flex; align-items: center; gap: var(--space-2); padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); font-size: var(--text-xs); font-weight: 700; white-space: nowrap; flex-shrink: 0; }
.priority-number { font-family: var(--font-display); font-size: var(--text-sm); line-height: 1; }
.priority-label { letter-spacing: 0.01em; }
.priority-score[data-tier="high"] { background: var(--color-success-highlight); color: var(--color-success); }
.priority-score[data-tier="mid"] { background: var(--color-primary-highlight); color: var(--color-primary); }
.priority-score[data-tier="low"] { background: var(--color-surface-offset); color: var(--color-text-faint); }
.priority-stats { display: flex; flex-wrap: wrap; gap: var(--space-4); flex: 1; }
.priority-scored { font-size: 0.6875rem; color: var(--color-text-faint); white-space: nowrap; flex-shrink: 0; margin-left: auto; }
.stat-row { display: flex; align-items: center; gap: var(--space-2); }
.stat-label { font-size: 0.6875rem; color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.03em; flex-shrink: 0; }
.stat-dots { display: flex; gap: 3px; flex-shrink: 0; }
.stat-dots .level-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--color-border); }
.stat-dots .level-dot[data-filled="true"] { background: var(--color-primary); }
.stat-value { font-size: var(--text-xs); font-weight: 600; color: var(--color-text); white-space: nowrap; }

.paper-meta-row { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-2); font-size: var(--text-xs); color: var(--color-text-faint); }
.paper-meta-row .mono { color: var(--color-text-faint); }
.tag { display: inline-flex; align-items: center; padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); font-size: var(--text-xs); font-weight: 600; }
.tag-ir { background: var(--topic-ir-bg); color: var(--topic-ir); }
.tag-recsys { background: var(--topic-recsys-bg); color: var(--topic-recsys); }
.tag-ranking { background: var(--topic-ranking-bg); color: var(--topic-ranking); }
.tag-ecom { background: var(--topic-ecom-bg); color: var(--topic-ecom); }
.tag-llm { background: var(--topic-llm-bg); color: var(--topic-llm); }
.tag-cloud { background: var(--topic-cloud-bg); color: var(--topic-cloud); }
.tag-agentops { background: var(--topic-agentops-bg); color: var(--topic-agentops); }
.tag-lang { background: var(--topic-lang-bg); color: var(--topic-lang); }
.tag-swe { background: var(--topic-swe-bg); color: var(--topic-swe); }
.tag-devtools { background: var(--topic-devtools-bg); color: var(--topic-devtools); }

.source-pill { background: var(--color-surface-offset); border: 1px solid var(--color-border); padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); }
.kind-pill { font-size: var(--text-xs); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); border: 1px solid var(--color-border); color: var(--color-text-muted); background: transparent; }
.kind-pill[data-kind="release"] { color: var(--color-success); border-color: var(--color-success); }

.date-info { display: inline-flex; align-items: baseline; gap: 4px; white-space: nowrap; color: var(--color-text-muted); }
.date-label { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-text-faint); }
.date-scanned { color: var(--color-text-faint); }

.empty-state { text-align: center; padding: var(--space-16) var(--space-6); color: var(--color-text-muted); border: 1px dashed var(--color-border); border-radius: var(--radius-lg); }

/* ===== Weekly digest archive (native <details>/<summary>, no JS) ===== */
.report-list { display: flex; flex-direction: column; gap: var(--space-3); }
.report-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  overflow: hidden;
}
.report-summary-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  list-style: none;
}
.report-summary-row::-webkit-details-marker { display: none; }
.report-summary-row:hover { background: var(--color-surface-offset); }
.report-summary-left { display: flex; align-items: center; gap: var(--space-4); }
.report-date { font-family: var(--font-display); font-weight: 700; font-size: var(--text-sm); }
.report-count { font-size: var(--text-xs); color: var(--color-text-muted); }
.chevron { width: 16px; height: 16px; color: var(--color-text-faint); transition: transform var(--transition-interactive); flex-shrink: 0; }
.report-item[open] .chevron { transform: rotate(180deg); }
.report-body { padding: 0 var(--space-5) var(--space-5); font-size: var(--text-sm); color: var(--color-text-muted); }
.report-body ul { margin-top: var(--space-3); display: flex; flex-direction: column; gap: var(--space-2); padding-left: 0; list-style: none; }
.report-body li { padding-left: var(--space-4); border-left: 2px solid var(--color-primary); }
.report-body li a { color: var(--color-primary); text-decoration: none; font-weight: 600; }
.report-body li a:hover { text-decoration: underline; }

footer { border-top: 1px solid var(--color-divider); padding-block: var(--space-8); margin-top: var(--space-16); }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4); font-size: var(--text-xs); color: var(--color-text-faint); }
.footer-inner a { color: var(--color-text-faint); }

@media (max-width: 900px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .dash-row { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .header-inner { flex-wrap: wrap; }
  .brand-text p { display: none; }
  .paper-top { flex-direction: column; }
}