/* ──────────────────────────────────────────────────────────────────
   Sift — calm editorial digest
   Palette: cream paper / charcoal, with a single emerald accent.
   Typography: Source Serif 4 (titles), Inter (body), JetBrains Mono (meta).
   Layout: max-width 80ch on desktop, mobile-first.
   ────────────────────────────────────────────────────────────────── */

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

:root {
  --bg: #f7f4ed;
  --bg-soft: #efeadd;
  --fg: #1a1b18;
  --fg-soft: #595a55;
  --fg-muted: #8a8b85;
  --line: #d8d3c4;
  --line-soft: #e5e0d2;
  --accent: oklch(0.62 0.13 155);
  --accent-strong: oklch(0.55 0.15 155);
  --accent-soft: oklch(0.96 0.04 155);
  --danger: oklch(0.6 0.18 25);

  --serif: "Source Serif 4", ui-serif, Georgia, "Times New Roman", serif;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --radius: 10px;
  --tap: 44px;
  --max-ch: 80ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101110;
    --bg-soft: #18191a;
    --fg: #e7e5dd;
    --fg-soft: #b1afa6;
    --fg-muted: #7c7e76;
    --line: #2a2c2a;
    --line-soft: #1f2120;
    --accent: oklch(0.78 0.12 155);
    --accent-strong: oklch(0.85 0.1 155);
    --accent-soft: oklch(0.25 0.05 155);
  }
}

[data-theme="light"] {
  --bg: #f7f4ed;
  --bg-soft: #efeadd;
  --fg: #1a1b18;
  --fg-soft: #595a55;
  --fg-muted: #8a8b85;
  --line: #d8d3c4;
  --line-soft: #e5e0d2;
  --accent: oklch(0.62 0.13 155);
  --accent-strong: oklch(0.55 0.15 155);
  --accent-soft: oklch(0.96 0.04 155);
}

[data-theme="dark"] {
  --bg: #101110;
  --bg-soft: #18191a;
  --fg: #e7e5dd;
  --fg-soft: #b1afa6;
  --fg-muted: #7c7e76;
  --line: #2a2c2a;
  --line-soft: #1f2120;
  --accent: oklch(0.78 0.12 155);
  --accent-strong: oklch(0.85 0.1 155);
  --accent-soft: oklch(0.25 0.05 155);
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 240ms;
  animation-timing-function: cubic-bezier(0.2, 0.7, 0.2, 1);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.skip-link {
  position: absolute;
  left: -1000px;
  top: 0;
  background: var(--fg);
  color: var(--bg);
  padding: 12px 16px;
  z-index: 99;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

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

/* ─────────────────────────  Masthead  ─────────────────────────── */

.masthead {
  padding: 4.5rem 1.25rem 2rem;
}
.masthead__inner {
  max-width: var(--max-ch);
  margin: 0 auto;
}
.masthead__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.5rem;
}
.masthead__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2.4rem, 6vw, 3.5rem);
  letter-spacing: -0.02em;
  margin: 0;
  line-height: 1;
}
.masthead__live {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  box-shadow: 0 0 0 0 var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 transparent; }
  50% { box-shadow: 0 0 0 6px transparent; }
}
.masthead__lede {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--fg-soft);
  margin: 1rem 0 0.6rem;
}
.masthead__meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0;
}
.sep { margin: 0 0.55rem; opacity: 0.55; }

/* ─────────────────────────  Filters  ───────────────────────────── */

.filters {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.filters__inner {
  max-width: var(--max-ch);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
}
.filters__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.55rem;
}
.filters__row--end { justify-content: flex-start; }
@media (min-width: 720px) {
  .filters__row--end { justify-content: flex-end; }
}
.filters__label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-right: 0.4rem;
  min-width: 64px;
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  flex: 1;
  min-width: 0;
}
.chip {
  font: inherit;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  background: transparent;
  color: var(--fg-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 0.85rem;
  min-height: var(--tap);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease;
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
}
.chip:hover {
  color: var(--fg);
  border-color: color-mix(in oklab, var(--line) 60%, var(--fg) 40%);
}
.chip[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-color: color-mix(in oklab, var(--accent) 35%, transparent);
}
[data-theme] .chip[aria-pressed="true"],
:root:not([data-theme]) .chip[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent-strong);
}
.chip__icon { font-size: 0.95em; line-height: 1; }
.chip--aux { padding: 0 0.7rem; }
.chip--mode { font-weight: 500; }
.mode-switch {
  display: inline-flex;
  border-radius: 999px;
  border: 1px solid var(--line);
  overflow: hidden;
  min-height: var(--tap);
}
.mode-switch .chip {
  border-radius: 0;
  border: none;
  min-height: var(--tap);
}
.mode-switch .chip[aria-pressed="true"] {
  background: var(--accent);
  color: var(--bg);
}
.mode-switch .chip[aria-pressed="true"]:hover {
  background: var(--accent-strong);
  color: var(--bg);
}

/* ─────────────────────────  Groups  ────────────────────────────── */

.digest {
  flex: 1 1 auto;
  max-width: var(--max-ch);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
  width: 100%;
  outline: none;
}
.groups { display: flex; flex-direction: column; }
.group {
  border-top: 1px solid var(--line);
  padding: 1.3rem 0 1rem;
}
.group:first-child { border-top: none; padding-top: 1.5rem; }
.group__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.6rem;
}
.group__eyebrow {
  font-family: var(--mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--fg);
  margin: 0;
}
.group__eyebrow em {
  font-style: normal;
  color: var(--fg-muted);
  margin-left: 0.4rem;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
}
.group__meta {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
}
.items { list-style: none; margin: 0; padding: 0; }
.item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.8rem;
  align-items: start;
  padding: 0.9rem 0;
  border-top: 1px solid var(--line-soft);
}
.item:first-child { border-top: none; }
.item__title {
  font-family: var(--serif);
  font-size: clamp(1.05rem, 2.2vw, 1.18rem);
  font-weight: 500;
  line-height: 1.3;
  margin: 0 0 0.3rem;
}
.item__title a {
  color: var(--fg);
  text-decoration: none;
}
.item__title a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.item__meta {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.45rem;
  align-items: center;
}
.src {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  padding: 0.1rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fg-muted);
}
.src[data-primary="true"] {
  color: var(--fg-soft);
  border-color: var(--line);
}
.src--accent { color: var(--accent-strong); border-color: color-mix(in oklab, var(--accent) 30%, var(--line)); }
.src--accent-strong { color: var(--accent-strong); border-color: var(--accent); font-weight: 600; }
.src__more {
  font-style: italic;
  color: var(--fg-muted);
}
.score {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}
.score::before { content: "↑"; opacity: 0.55; }
.item__actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
}
.item__save {
  font: inherit;
  font-family: var(--mono);
  font-size: 0.72rem;
  background: transparent;
  border: 1px solid transparent;
  color: var(--fg-muted);
  border-radius: 999px;
  width: var(--tap);
  height: var(--tap);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color 120ms ease, border-color 120ms ease, background 120ms ease;
  -webkit-tap-highlight-color: transparent;
}
.item__save:hover { color: var(--fg); border-color: var(--line); }
.item__save[aria-pressed="true"] {
  color: var(--accent-strong);
  background: var(--accent-soft);
  border-color: color-mix(in oklab, var(--accent) 35%, transparent);
}
.item__save[aria-pressed="true"]::after { content: "★"; }
.item__save::after { content: "☆"; font-size: 1.1em; }
.item__age {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--fg-muted);
  white-space: nowrap;
}
.more {
  margin-top: 0.7rem;
  font-family: var(--mono);
  font-size: 0.74rem;
}
.more button {
  background: transparent;
  border: none;
  color: var(--accent-strong);
  cursor: pointer;
  font: inherit;
  padding: 0.4rem 0;
  min-height: var(--tap);
  display: inline-flex;
  align-items: center;
}
.more button:hover { text-decoration: underline; }

/* ─────────────────────────  Status / empty  ────────────────────── */

.status {
  padding: 4rem 0 2rem;
  text-align: center;
  color: var(--fg-soft);
}
.status h2 {
  font-family: var(--serif);
  font-size: 1.4rem;
  margin: 0 0 0.5rem;
  font-weight: 500;
}
.status p {
  font-family: var(--mono);
  font-size: 0.84rem;
  color: var(--fg-muted);
  margin: 0.3rem 0;
}
.status__dot {
  display: inline-block;
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
  margin-right: 0.5rem;
  vertical-align: 0.15em;
}
.error {
  color: var(--danger);
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 1rem 0;
}

/* ─────────────────────────  Colophon  ──────────────────────────── */

.colophon {
  border-top: 1px solid var(--line);
  padding: 2rem 1.25rem 3rem;
  margin-top: auto;
}
.colophon__inner {
  max-width: var(--max-ch);
  margin: 0 auto;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
}
.colophon p { margin: 0 0 0.35rem; }
.colophon__meta { color: var(--fg-muted); }

/* ─────────────────────────  Print  ─────────────────────────────── */

@media print {
  :root, [data-theme] {
    --bg: #fff !important;
    --fg: #111 !important;
    --line: #aaa !important;
    --line-soft: #ddd !important;
    --accent: #1a5d3b !important;
    --accent-strong: #14472d !important;
    --accent-soft: #eaf3ec !important;
  }
  .filters, .colophon, .item__save, .item__actions, .skip-link { display: none !important; }
  .masthead { padding: 1.5rem 0 0.5rem; }
  .item { break-inside: avoid; padding: 0.45rem 0; }
  .group { break-inside: avoid-page; padding: 0.6rem 0; }
  body { font-size: 11pt; }
  .digest { max-width: none; padding: 1rem 1.4cm; }
  a { color: var(--fg); }
  a[href]::after {
    content: "";
  }
}