/* Fonts (self-hosted, OFL) */
@font-face {
  font-family: "Inter";
  src: url("fonts/inter-latin-wght.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("fonts/newsreader-latin-wght.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}

/* Tokens: light (default) */
:root {
  color-scheme: light;
  --bg: #fafbfc;
  --bg-soft: #f1f4f8;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #5b6577;
  --brand: #2563eb;
  --on-brand: #ffffff;
  --signal: #12a37a;
  --on-signal: #04251b;
  --signal-text: #0b7a5a;
  --danger: #d92d20;
  --danger-bg: rgba(217, 45, 32, 0.08);
  --header-bg: rgba(250, 251, 252, 0.88);
  --glow-a: rgba(37, 99, 235, 0.10);
  --glow-b: rgba(18, 163, 122, 0.10);
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 10px 28px -14px rgba(15, 23, 42, 0.18);
  --radius: 14px;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Newsreader", Georgia, "Times New Roman", serif;
}

/* Tokens: dark (explicit choice) */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #070c15;
  --bg-soft: #0b1320;
  --card: #0f1a2b;
  --border: #1f2e45;
  --text: #eef3fa;
  --muted: #8d9bb1;
  --brand: #5b9bff;
  --on-brand: #06101f;
  --signal: #2fe39a;
  --on-signal: #03241a;
  --signal-text: #2fe39a;
  --danger: #ff6b61;
  --danger-bg: rgba(255, 107, 97, 0.10);
  --header-bg: rgba(7, 12, 21, 0.78);
  --glow-a: rgba(91, 155, 255, 0.22);
  --glow-b: rgba(47, 227, 154, 0.15);
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 12px 32px -12px rgba(0, 0, 0, 0.7);
}

/* Tokens: dark (system preference, no explicit choice) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #070c15;
    --bg-soft: #0b1320;
    --card: #0f1a2b;
    --border: #1f2e45;
    --text: #eef3fa;
    --muted: #8d9bb1;
    --brand: #5b9bff;
    --on-brand: #06101f;
    --signal: #2fe39a;
    --on-signal: #03241a;
    --signal-text: #2fe39a;
    --danger: #ff6b61;
    --danger-bg: rgba(255, 107, 97, 0.10);
    --header-bg: rgba(7, 12, 21, 0.78);
    --glow-a: rgba(91, 155, 255, 0.22);
    --glow-b: rgba(47, 227, 154, 0.15);
    --shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 12px 32px -12px rgba(0, 0, 0, 0.7);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 64rem; margin: 0 auto; padding: 0 1.25rem; }

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--header-bg);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  padding: 0.7rem 1.25rem;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  color: var(--text);
}
.logo:hover { text-decoration: none; }
.logo span { color: var(--brand); }
.logo-mark { width: 1.7rem; height: 1.7rem; flex: none; }
.site-nav { display: flex; gap: 1rem; flex-wrap: wrap; margin-left: auto; }
.site-nav a { color: var(--muted); font-size: 0.93rem; }
.site-nav a:hover,
.site-nav a[aria-current="page"] { color: var(--text); text-decoration: none; }
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  padding: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  cursor: pointer;
}
.theme-toggle:hover { color: var(--text); border-color: var(--brand); }
.theme-toggle svg { width: 1.1rem; height: 1.1rem; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}

/* Main + typography */
main.wrap { padding-top: 2.5rem; padding-bottom: 4rem; }
h1, h2, h3 { font-family: var(--font-serif); font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 2rem; line-height: 1.15; margin: 0 0 1rem; }
h2 { font-size: 1.5rem; line-height: 1.25; margin: 0 0 0.75rem; }
h3 { font-size: 1.15rem; margin: 0 0 0.4rem; }
p { margin: 0 0 1rem; }
.lead { font-size: 1.1rem; color: var(--muted); max-width: 42rem; }
section { margin-top: 3rem; }
.section-title { margin-bottom: 0.4rem; }
.section-lead { color: var(--muted); max-width: 42rem; }

/* Hero + CTA */
.hero {
  position: relative;
  margin-top: 0;
  padding: 0.5rem 0 0.5rem;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -1.5rem -1.25rem auto;
  height: 22rem;
  z-index: -1;
  background:
    radial-gradient(40rem 14rem at 15% 0%, var(--glow-a), transparent 70%),
    radial-gradient(34rem 14rem at 85% 10%, var(--glow-b), transparent 70%);
  pointer-events: none;
}
.eyebrow {
  display: inline-block;
  margin-bottom: 0.9rem;
  color: var(--signal-text);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.cta-row { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.4rem; }
.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 10px;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--brand); color: var(--on-brand); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-secondary { background: var(--card); border-color: var(--border); color: var(--text); }
.btn-secondary:hover { border-color: var(--brand); }
.btn:disabled { opacity: 0.45; cursor: default; }

/* Cards: features, steps, ChatGPT */
.feature-grid,
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin-top: 1.1rem;
}
.feature,
.step {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow);
  transition: border-color 0.15s, transform 0.15s;
}
.feature:hover { border-color: var(--brand); transform: translateY(-2px); }
.feature p,
.step p { color: var(--muted); font-size: 0.93rem; margin: 0; }
.steps { counter-reset: step; }
.step { counter-increment: step; }
.step h3::before {
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.7rem;
  height: 1.7rem;
  margin-right: 0.6rem;
  border-radius: 50%;
  background: var(--brand);
  color: var(--on-brand);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
}
.chatgpt-block {
  margin-top: 3rem;
  padding: 1.6rem 1.4rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, var(--glow-a), var(--glow-b)),
    var(--card);
}
.chatgpt-block h2 { margin-top: 0.6rem; }
.chatgpt-block p { color: var(--muted); max-width: 42rem; margin-bottom: 0; }
.badge {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: var(--signal);
  color: var(--on-signal);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.placeholder {
  margin-top: 1.1rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
  color: var(--muted);
  padding: 2rem 1.4rem;
  text-align: center;
}
.placeholder strong { color: var(--text); }

/* Screener */
.screener-form {
  margin-top: 1.1rem;
  padding: 1.1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.filters-panel > summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  padding: 0.2rem 0;
}
.filters-panel > summary:hover { color: var(--brand); }
.filters-panel[open] > summary { margin-bottom: 0.9rem; }
.filters-panel > .field { margin-top: 0.9rem; }
.filters {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem 1rem;
}
.field { display: flex; flex-direction: column; gap: 0.25rem; }
.field > label { font-size: 0.85rem; color: var(--muted); }
.screener-form select,
.screener-form input {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
  padding: 0.45rem 0.6rem;
  width: 100%;
}
.screener-form select:focus,
.screener-form input:focus { border-color: var(--brand); outline: none; }
.screener-form input[type="checkbox"] { width: auto; }
.check-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.check { font-size: 0.9rem; display: inline-flex; align-items: center; gap: 0.4rem; }
.check-grid .check {
  position: relative;
  padding: 0.38rem 0.85rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
}
.check-grid .check:hover { border-color: var(--brand); color: var(--text); }
.check-grid .check input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  pointer-events: none;
}
.check-grid .check:has(input:checked) {
  background: var(--brand);
  border-color: var(--brand);
  color: var(--on-brand);
}
.check-grid .check:has(input:checked)::before {
  content: "\2713";
  margin-right: 0.4rem;
  font-weight: 700;
}
.check-grid .check:has(input:focus-visible) { outline: 2px solid var(--brand); outline-offset: 2px; }
.field-error { color: var(--danger); font-size: 0.85rem; margin: 0; }
.field-error:empty { display: none; }
.hint {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.05em;
  height: 1.05em;
  margin-left: 0.25rem;
  border: 1px solid var(--muted);
  border-radius: 50%;
  color: var(--muted);
  font-size: 0.72em;
  font-weight: 600;
  cursor: help;
  user-select: none;
}
.hint::after {
  content: attr(data-tip);
  position: absolute;
  left: 50%;
  top: calc(100% + 0.4rem);
  transform: translateX(-50%);
  visibility: hidden;
  width: max-content;
  max-width: min(15rem, 70vw);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.45rem 0.7rem;
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 400;
  line-height: 1.4;
  text-align: left;
  white-space: normal;
  z-index: 20;
  pointer-events: none;
}
label:hover > .hint::after,
.hint:hover::after { visibility: visible; }
.screener-actions {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-top: 1.1rem;
}
.col-picker {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.5rem 0.9rem;
  font-size: 0.95rem;
}
.col-picker summary { cursor: pointer; color: var(--muted); }
.col-picker summary:hover { color: var(--text); }
.col-grid { padding: 0.75rem 0 0.25rem; }
.screener-error {
  margin-top: 1rem;
  border: 1px solid var(--danger);
  background: var(--danger-bg);
  border-radius: var(--radius);
  color: var(--danger);
  padding: 0.8rem 1rem;
  font-size: 0.95rem;
}
.screener-error:empty { display: none; }
.table-wrap {
  margin-top: 1.25rem;
  max-height: 65vh;
  overflow: auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.screener-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}
.screener-table th,
.screener-table td {
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  text-align: left;
}
.screener-table thead th {
  position: sticky;
  top: 0;
  background: var(--bg-soft);
  z-index: 2;
}
.screener-table th:first-child,
.screener-table td:first-child {
  position: sticky;
  left: 0;
  background: var(--card);
  z-index: 1;
}
.screener-table thead th:first-child {
  background: var(--bg-soft);
  z-index: 3;
}
.screener-table th.sortable { cursor: pointer; user-select: none; }
.screener-table th.sortable:hover { color: var(--brand); }
.screener-table th.sortable.asc::after { content: " \2191"; }
.screener-table th.sortable.desc::after { content: " \2193"; }
.screener-table .table-hint td { color: var(--muted); text-align: center; padding: 1.4rem 0; }
.screener-pager {
  display: flex;
  gap: 0.9rem;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 1rem;
}
.pg-status { color: var(--muted); font-size: 0.9rem; }
.pg-limit {
  display: inline-flex;
  gap: 0.45rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.9rem;
}
.pg-limit select {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 0.35rem 0.45rem;
}
.screener-meta { color: var(--muted); font-size: 0.85rem; margin-top: 0.9rem; }

/* FAQ */
.faq { margin-top: 1.1rem; }
.faq details,
.faq-item {
  border-top: 1px solid var(--border);
  padding: 0.9rem 0;
}
.faq details:last-child { border-bottom: 1px solid var(--border); }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  color: var(--muted);
  font-weight: 400;
  font-size: 1.2rem;
  line-height: 1.3;
}
.faq details[open] > summary::after { content: "\2212"; }
.faq details p,
.faq-item p { color: var(--muted); margin: 0.6rem 0 0; }

/* Policies */
.disclaimer {
  border: 1px solid var(--danger);
  background: var(--danger-bg);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  font-weight: 600;
}
ul.checks { list-style: none; padding: 0; margin: 0 0 1rem; }
ul.checks li { padding: 0.2rem 0 0.2rem 1.6rem; position: relative; }
ul.checks li::before {
  content: "\2014";
  position: absolute;
  left: 0;
  color: var(--danger);
  font-weight: 700;
}

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-soft); }
.footer-inner { padding: 1.4rem 1.25rem; display: flex; flex-direction: column; gap: 0.6rem; }
.footer-nav { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.footer-nav a { color: var(--muted); font-size: 0.9rem; }
.footer-copy { color: var(--muted); font-size: 0.85rem; margin: 0; }

/* >= 640px */
@media (min-width: 40rem) {
  h1 { font-size: 2.7rem; }
  h2 { font-size: 1.7rem; }
  .hero { padding-top: 1.5rem; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .filters { grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr)); }
  .screener-form { padding: 1.4rem; }
}

/* >= 960px */
@media (min-width: 60rem) {
  h1 { font-size: 3.1rem; }
  .feature-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}