/* ============================================================
   Loopsmate — /resource/ Design System (skeleton)
   Tokens derive from nudge-landing/landing.html brand
   paper #ffffff · ink #121212 · accent lime #d4f796 · grays
   Display: Source Serif 4 (calm editorial) · Body: Inter
   ============================================================ */

:root {
  --paper: #ffffff;
  --paper-2: #f8f8f9;
  --ink: #121212;
  --ink-2: #3d3d3d;
  --muted: #666666;
  --faint: #8b8b90;
  --line: #e8e8ea;
  --line-2: #f0f0f1;
  --accent: #d4f796;
  --accent-ink: #24330f;
  --accent-line: #a8cc5e;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --nav-radius: 18px;

  --sans: 'Inter', -apple-system, 'Segoe UI', Roboto, sans-serif;
  --serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;

  --shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.03);
  --shadow-card: 0 25px 60px -15px rgba(0, 0, 0, 0.10), 0 0 0 1px rgba(0, 0, 0, 0.04);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.6;
  font-size: 16px;
}

/* ---------- layout shell ---------- */

.shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.shell-narrow { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- top navigation (mirrors landing floating-nav) ---------- */

.topbar {
  position: sticky;
  top: 16px;
  z-index: 50;
  margin: 16px 24px 0;
}
.topbar-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: rgba(237, 237, 237, 0.72);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-radius: var(--nav-radius);
  padding: 10px 18px;
}
.brand {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
}
.brand .mark {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 3px;
  background: var(--accent);
  border: 1px solid var(--accent-line);
  margin-right: 8px;
}
.topnav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.topnav-links a {
  display: block;
  padding: 6px 12px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.topnav-links a:hover { background: rgba(255, 255, 255, 0.75); color: var(--ink); }
.topnav-links a.is-current { background: #ffffff; color: var(--ink); }
.topnav-cta {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  background: var(--accent);
  border: 1px solid var(--accent-line);
  padding: 8px 16px;
  border-radius: 10px;
  text-decoration: none;
  transition: background-color 0.15s ease;
}
.topnav-cta:hover { background: #c8ec7c; }

/* ---------- breadcrumbs ---------- */

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--faint);
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.breadcrumbs li + li::before { content: "/"; color: var(--line); margin-right: 6px; }
.breadcrumbs a { color: var(--muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--ink); }
.breadcrumbs .here { color: var(--ink); font-weight: 500; }

/* ---------- page header ---------- */

.pagehead { padding: 40px 0 8px; }
.kicker {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 14px;
}
h1.display {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(34px, 5.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  max-width: 20ch;
}
.lede {
  font-size: 17.5px;
  color: var(--muted);
  max-width: 56ch;
  margin: 0;
}
.lede strong { color: var(--ink); font-weight: 600; }

/* ---------- section rhythm ---------- */

.section { padding: 48px 0 8px; }
.section-label {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-2);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: 600 15px/1 var(--sans);
  letter-spacing: -0.01em;
  padding: 12px 20px;
  border-radius: 10px;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn-solid { background: var(--ink); color: #fff; }
.btn-solid:hover { background: #2b2b2b; }
.btn-lime { background: var(--accent); color: var(--accent-ink); border-color: var(--accent-line); }
.btn-lime:hover { background: #c8ec7c; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }

/* ---------- discovery / section tiles (hub page) ---------- */

.disc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}
.disc-tile {
  display: block;
  padding: 26px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--paper);
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}
.disc-tile:hover { border-color: var(--ink); box-shadow: var(--shadow-soft); transform: translateY(-2px); }
.disc-num {
  font-family: var(--serif);
  font-size: 30px;
  line-height: 1;
  color: var(--faint);
  display: block;
  margin-bottom: 18px;
}
.disc-tile h3 {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 500;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.disc-tile p { margin: 0; font-size: 14.5px; color: var(--muted); }
.disc-tile .go { display: inline-block; margin-top: 16px; font-size: 13.5px; font-weight: 600; color: var(--ink); }
.disc-tile .go svg { vertical-align: -2px; margin-left: 4px; }

/* ---------- tools table (tools index) ---------- */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper);
}
table.tools {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
table.tools th {
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--faint);
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
table.tools td {
  padding: 15px 16px;
  border-bottom: 1px solid var(--line-2);
  vertical-align: top;
}
table.tools tr:last-child td { border-bottom: 0; }
table.tools tr:hover td { background: var(--paper-2); }
.tool-title { font-weight: 600; color: var(--ink); text-decoration: none; }
.tool-title:hover { text-decoration: underline; text-underline-offset: 3px; }
.tool-sub { display: block; font-weight: 400; color: var(--muted); font-size: 13.5px; margin-top: 2px; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-2);
  white-space: nowrap;
}
.pill.rise { color: #276749; border-color: #b7e3c8; background: #f0faf3; }
.pill.steady { color: var(--muted); }
.pill.prime { background: var(--accent); border-color: var(--accent-line); color: var(--accent-ink); }
.pill.report { color: var(--accent-ink); border-color: var(--accent-line); background: var(--accent); }
.pill.article { color: var(--ink-2); border-color: var(--line); background: var(--paper-2); }
.pill.paper { color: #fff; border-color: var(--ink); background: var(--ink); }

/* unified library item layout */
.lib-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
  font-size: 13.5px;
  color: var(--faint);
  margin: 20px 0 0;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin: 30px 0 0;
}
.action-strip { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 0; }

.score { display: flex; gap: 4px; }
.score i {
  width: 10px; height: 10px;
  border-radius: 3px;
  background: var(--line);
  display: inline-block;
}
.score i.on { background: var(--ink); }
.score i.on-lime { background: var(--accent-line); }

/* ---------- editorial list (guides / articles / library indexes) ---------- */

.ed-list { list-style: none; margin: 0; padding: 0; }
.ed-list li { border-top: 1px solid var(--line); }
.ed-list li:last-child { border-bottom: 1px solid var(--line); }
.ed-item {
  display: grid;
  grid-template-columns: 84px 1fr auto;
  gap: 20px;
  align-items: baseline;
  padding: 26px 8px;
  text-decoration: none;
  color: var(--ink);
  transition: background-color 0.15s ease;
}
.ed-item:hover { background: var(--paper-2); }
.ed-num {
  font-family: var(--serif);
  font-size: 26px;
  color: var(--faint);
}
.ed-item h3 {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
  line-height: 1.3;
}
.ed-item:hover h3 { text-decoration: underline; text-underline-offset: 4px; }
.ed-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 13px;
  color: var(--faint);
}
.ed-meta .kw { color: var(--muted); }
.ed-arrow { color: var(--faint); align-self: center; }
.ed-item:hover .ed-arrow { color: var(--ink); }

/* ---------- article / guide body ---------- */

.prose { font-size: 16.5px; color: var(--ink-2); max-width: 72ch; }
.prose h2 {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 44px 0 14px;
}
.prose p { margin: 0 0 18px; }
.prose ul { margin: 0 0 18px; padding-left: 4px; list-style: none; }
.prose li { position: relative; padding-left: 22px; margin-bottom: 10px; }
.prose li::before {
  content: "";
  position: absolute;
  left: 2px; top: 10px;
  width: 8px; height: 8px;
  border-radius: 2px;
  background: var(--accent-line);
}
.prose blockquote {
  margin: 28px 0;
  padding: 18px 24px;
  border-left: 3px solid var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--paper-2);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.prose blockquote p { margin: 0; }
.byline {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--faint);
  margin: 18px 0 0;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}
.byline .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--line); }

/* ---------- research report layout ---------- */

.report-cover {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  background:
    linear-gradient(180deg, var(--paper-2), var(--paper));
}
.report-cover .kicker { margin-bottom: 10px; }
.report-cover h1.display {
  font-size: clamp(30px, 4.6vw, 44px);
  max-width: 24ch;
}
.report-cover .meta-row {
  display: flex; flex-wrap: wrap; gap: 8px 20px;
  margin-top: 26px; font-size: 13.5px; color: var(--faint);
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin: 30px 0 0;
}
.stat {
  border-top: 3px solid var(--ink);
  padding: 18px 2px 4px;
}
.stat .value {
  font-family: var(--serif);
  font-size: 38px;
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat .label { font-size: 13.5px; color: var(--muted); margin-top: 8px; display: block; }
.stat .note { font-size: 12px; color: var(--faint); display: block; margin-top: 2px; }

/* ---------- library entry (cited paper card) ---------- */

.cite-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  background: var(--paper);
}
.cite-card .cit {
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
  margin: 0 0 14px;
}
.cite-card h3 { font-family: var(--serif); font-size: 20px; font-weight: 500; margin: 0 0 8px; }
.cite-card .plain { font-size: 14.5px; color: var(--ink-2); margin: 0; }
.cite-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.code-chip {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 12px;
  color: var(--muted);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 3px 8px;
}

/* ---------- conversion module (inline CTA) ---------- */

.cta-module {
  margin: 56px 0 8px;
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: #fff;
  padding: 40px 36px;
}
.cta-module .tag {
  font-size: 13px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 10px;
}
.cta-module h2 {
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: #fff;
}
.cta-module p.sub { color: #c9c9ce; font-size: 15.5px; margin: 0 0 24px; max-width: 46ch; }
.cta-form { display: flex; flex-wrap: wrap; gap: 10px; max-width: 520px; }
.cta-form input[type="email"] {
  flex: 1 1 240px;
  font: 500 15px/1 var(--sans);
  padding: 13px 16px;
  border-radius: 10px;
  border: 1px solid #333336;
  background: #1c1c1e;
  color: #fff;
  outline: none;
}
.cta-form input[type="email"]::placeholder { color: #7c7c82; }
.cta-form input[type="email"]:focus { border-color: var(--accent-line); }
.cta-quota { font-size: 13px; color: #9a9aa2; margin: 14px 0 0; }
.cta-quota strong { color: var(--accent); font-weight: 600; }

/* ---------- footer ---------- */

.footer {
  margin-top: 72px;
  border-top: 1px solid var(--line);
  padding: 28px 0 36px;
  font-size: 13px;
  color: var(--faint);
}
.footer .shell { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between; }
.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--ink); }
.footer .links { display: flex; gap: 18px; }

/* ---------- skeleton badge ---------- */

.skel-badge {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 100;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--paper);
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
}

/* ---------- misc ---------- */

.muted-note { font-size: 13px; color: var(--faint); }
hr.rule { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }
.spacer { height: 8px; }