/* Think Like a Senior: landing page styles.
   No external fonts or scripts: nothing is loaded from third parties (good for GDPR and speed). */

:root {
  --ink: #0b1020;
  --panel: #131a33;
  --line: #263055;
  --paper: #f8fafc;
  --soft: #cbd5e1;
  --muted: #94a3b8;
  --teal: #5eead4;
  --teal-hover: #99f6e4;
  --error: #fca5a5;
  --amber: #fcd34d;

  --font-body: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, "DejaVu Sans Mono", monospace;

  --radius: 14px;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background:
    radial-gradient(900px 520px at 88% -8%, rgba(39, 54, 118, 0.75), transparent 70%),
    var(--ink);
  color: var(--soft);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--teal); text-underline-offset: 3px; }
a:hover { color: var(--teal-hover); }

:focus-visible { outline: 3px solid var(--teal); outline-offset: 3px; border-radius: 6px; }

.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

/* ---------- Header ---------- */
.site-header { padding: 28px 0 0; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--paper);
  font-weight: 800;
  font-size: 1.375rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.brand:hover { color: var(--paper); }

/* The cursor block from the profile picture */
.cursor {
  display: inline-block;
  width: 0.3em;
  height: 0.8em;
  background: var(--teal);
  border-radius: 2px;
}
.brand .cursor { width: 9px; height: 22px; }

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 72px;
  align-items: center;
  padding: 64px 0 104px;
}

h1, h2, h3 {
  color: var(--paper);
  font-weight: 800;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

h1 {
  margin: 0;
  font-size: clamp(2.5rem, 6.2vw, 4.25rem);
  line-height: 1.04;
  max-width: 12ch;
}
h1 .cursor { margin-left: 0.14em; vertical-align: -0.02em; }

.lead {
  margin: 28px 0 36px;
  max-width: 32em;
  font-size: 1.25rem;
  line-height: 1.55;
  color: var(--soft);
  text-wrap: pretty;
}

/* ---------- Signup form ---------- */
.signup { max-width: 34rem; }

.signup label.field-label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--paper);
}

.signup-row { display: flex; gap: 12px; }

.signup input[type="email"] {
  flex: 1 1 auto;
  min-width: 0;
  height: 56px;
  padding: 0 18px;
  border: 1px solid #38437a;
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--paper);
  font: inherit;
}
.signup input[type="email"]::placeholder { color: #74809f; }
.signup input[type="email"]:focus-visible { outline-offset: 2px; border-color: var(--teal); }

.btn {
  flex: none;
  height: 56px;
  padding: 0 26px;
  border: 0;
  border-radius: var(--radius);
  background: var(--teal);
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease;
}
.btn:hover { background: var(--teal-hover); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.6; cursor: progress; }

.help {
  margin: 14px 0 0;
  font-size: 0.9375rem;
  color: var(--muted);
}

.consent {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 16px;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--soft);
  cursor: pointer;
}
.consent input {
  flex: none;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  accent-color: var(--teal);
}

.status { min-height: 1.5em; margin: 12px 0 0; font-size: 0.9375rem; }
.status[data-state="error"] { color: var(--error); }
.status[data-state="info"] { color: var(--amber); }

/* ---------- Review panel (the one memorable element) ---------- */
.review {
  margin: 0;
  padding: 26px 28px 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  font-family: var(--font-mono);
}

.review-title {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--paper);
}

.review ul { list-style: none; margin: 0; padding: 0; }

.check {
  position: relative;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 14px;
  align-items: start;
  padding: 11px 0;
  font-size: 0.9375rem;
  line-height: 1.45;
  color: var(--soft);
  cursor: pointer;
}

.check input {
  position: absolute;
  left: 0; top: 11px;
  width: 28px; height: 28px;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.box {
  display: grid;
  place-items: center;
  width: 26px; height: 26px;
  border: 2px solid #586490;
  border-radius: 8px;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}
.box::after {
  content: "";
  width: 6px; height: 12px;
  margin-top: -2px;
  border: solid var(--ink);
  border-width: 0 3px 3px 0;
  transform: rotate(45deg) scale(0);
  transition: transform 0.15s ease;
}

.check input:checked + .box { background: var(--teal); border-color: var(--teal); }
.check input:checked + .box::after { transform: rotate(45deg) scale(1); }
.check input:checked ~ .check-text { color: var(--paper); }
.check input:focus-visible + .box { outline: 3px solid var(--teal); outline-offset: 3px; }

.review-foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 0.875rem;
  color: var(--muted);
}
.review-foot span { white-space: nowrap; }
.review[data-ready] .verdict { color: var(--teal); font-weight: 700; }

.panel-note { margin: 14px 4px 0; font-size: 0.9375rem; color: var(--muted); }

/* ---------- Sections ---------- */
.section { padding: 88px 0; }

h2 { margin: 0; font-size: clamp(1.75rem, 3.6vw, 2.5rem); line-height: 1.12; }

.inside {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 72px;
}
.inside p.sub { margin: 16px 0 0; color: var(--muted); max-width: 22em; }

.groups { margin: 0; display: grid; gap: 30px; }
.group { display: grid; grid-template-columns: 11rem minmax(0, 1fr); gap: 24px; align-items: baseline; }
.group dt { margin: 0; color: var(--paper); font-weight: 700; }
.group dd { margin: 0; color: var(--soft); }

.author {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  max-width: 46rem;
}
.author img { width: 72px; height: 72px; border-radius: 50%; }
.author h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: 14px; }
.author p { margin: 0; text-wrap: pretty; }

.final { padding-bottom: 112px; }
.final h2 { margin-bottom: 28px; }

/* ---------- Thank-you and privacy pages ---------- */
.page { padding: 72px 0 112px; max-width: 44rem; }
.page h1 { max-width: none; font-size: clamp(2.25rem, 5vw, 3.25rem); margin-bottom: 20px; }
.page h2 { font-size: 1.375rem; margin: 44px 0 10px; letter-spacing: -0.02em; }
.page p, .page li { text-wrap: pretty; }
.page ul { padding-left: 1.2em; }
.page li { margin: 6px 0; }
.updated { color: var(--muted); font-size: 0.9375rem; }

mark.todo {
  padding: 1px 6px;
  border: 1px dashed var(--amber);
  border-radius: 6px;
  background: rgba(252, 211, 77, 0.12);
  color: var(--amber);
}

/* ---------- Footer ---------- */
.site-footer { padding: 36px 0 52px; border-top: 1px solid var(--line); font-size: 0.9375rem; color: var(--muted); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; justify-content: space-between; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.site-footer a { color: var(--soft); }
.site-footer a:hover { color: var(--teal); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: 48px; padding: 40px 0 72px; }
  .inside { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  .section { padding: 64px 0; }
  .group { grid-template-columns: minmax(0, 1fr); gap: 4px; }
}

@media (max-width: 560px) {
  .signup-row { flex-direction: column; }
  .btn { width: 100%; }
  .review { padding: 22px 20px 18px; }
  .review-foot { font-size: 0.8125rem; }
  .author { grid-template-columns: minmax(0, 1fr); gap: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}