/* StudyLens marketing — paper & ink, one marigold accent, lens motif.
   Zero dependencies; hand-written, ~no build. */

:root {
  --paper: #FAF7F0;
  --paper-deep: #F2ECDF;
  --ink: #1B2A41;
  --ink-soft: #51617A;
  --marigold: #DF9A0B;
  --marigold-deep: #B87E06;
  --line: rgba(27, 42, 65, 0.16);
  --display: "Fraunces", Georgia, serif;
  --body: "Inter", -apple-system, "Segoe UI", sans-serif;
  --measure: 62ch;
  --pad: clamp(1.25rem, 4vw, 3rem);
}

* { box-sizing: border-box; margin: 0; }

[hidden] { display: none !important; }

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

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--marigold-deep);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--body);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border-radius: 999px;
  padding: 0.8em 1.7em;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, background-color 0.12s ease;
}
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--marigold);
  color: var(--ink);
}
.btn-primary:hover { background: var(--marigold-deep); color: var(--paper); }

.btn-outline {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}
.btn-outline:hover { background: var(--ink); color: var(--paper); }

.btn-small { padding: 0.55em 1.3em; font-size: 0.9375rem; }

/* ---------- Header ---------- */

.site-header {
  display: flex;
  align-items: center;
  gap: 2rem;
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.25rem var(--pad);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.35rem;
  text-decoration: none;
}
.lens-mark { width: 1.5rem; height: 1.5rem; }

.site-nav {
  display: flex;
  gap: 1.6rem;
  margin-left: auto;
  font-size: 0.9375rem;
  font-weight: 500;
}
.site-nav a { text-decoration: none; color: var(--ink-soft); }
.site-nav a:hover { color: var(--ink); }

/* ---------- Hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  max-width: 72rem;
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 6rem) var(--pad) clamp(3rem, 8vw, 7rem);
}

.eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--marigold-deep);
  margin-bottom: 1.1rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5.2vw, 3.7rem);
  max-width: 16ch;
}

.hero-sub {
  margin-top: 1.4rem;
  max-width: 46ch;
  font-size: 1.125rem;
  color: var(--ink-soft);
}

.hero-cta { margin-top: 2.2rem; }
.cta-note {
  margin-top: 0.8rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

/* ---------- Viewfinder demo (signature) ---------- */

.viewfinder {
  position: relative;
  background: #FFFDF8;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1.75rem 1.6rem 1.4rem;
  box-shadow: 0 18px 40px -22px rgba(27, 42, 65, 0.35);
}

.corner {
  position: absolute;
  width: 26px;
  height: 26px;
  border: 3px solid var(--marigold);
}
.c-tl { top: -8px; left: -8px; border-right: 0; border-bottom: 0; border-top-left-radius: 8px; }
.c-tr { top: -8px; right: -8px; border-left: 0; border-bottom: 0; border-top-right-radius: 8px; }
.c-bl { bottom: -8px; left: -8px; border-right: 0; border-top: 0; border-bottom-left-radius: 8px; }
.c-br { bottom: -8px; right: -8px; border-left: 0; border-top: 0; border-bottom-right-radius: 8px; }

@keyframes settle {
  from { transform: scale(1.06); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}
.corner { animation: settle 0.6s ease-out both; }

.vf-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.9rem;
}

.worksheet-line {
  font-family: var(--display);
  font-size: 1.2rem;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--line);
}

.coach-turn {
  margin-top: 1.1rem;
  font-size: 0.9375rem;
  color: var(--ink);
}

.turn-tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.1em 0.75em;
  margin-bottom: 0.35rem;
}
.turn-tag-answer {
  color: var(--marigold-deep);
  border-color: var(--marigold);
}

.btn-reveal {
  background: transparent;
  border: 1.5px solid var(--marigold);
  color: var(--marigold-deep);
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.5em 1.3em;
  display: block;
  margin-top: 0.2rem;
}
.btn-reveal:hover { background: var(--marigold); color: var(--ink); }

.answer-body { font-size: 1.05rem; }
.confidence {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-left: 0.5rem;
}

.reveal-note {
  margin-top: 0.5rem;
  font-size: 0.8125rem;
  color: var(--ink-soft);
  font-style: italic;
}

.vf-voice {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  color: var(--ink-soft);
}
.vf-voice svg { width: 1rem; height: 1rem; flex: none; color: var(--marigold-deep); }

/* ---------- Shared section bits ---------- */

.how, .pricing, .faq {
  max-width: 72rem;
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 5.5rem) var(--pad);
}

.how h2, .pricing h2, .faq h2, .coach-panel h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
}

.section-sub {
  margin-top: 0.7rem;
  color: var(--ink-soft);
  max-width: var(--measure);
}

/* ---------- How it works ---------- */

.how { border-top: 1px solid var(--line); }

.steps {
  list-style: none;
  padding: 0;
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.step {
  position: relative;
  padding: 1.4rem 1.3rem;
  border-left: 3px solid var(--marigold);
  background: var(--paper-deep);
  border-radius: 0 6px 6px 0;
}

.step-num {
  font-family: var(--display);
  font-size: 1.9rem;
  font-weight: 600;
  color: var(--marigold-deep);
  line-height: 1;
}

.step h3 { font-size: 1.2rem; margin-top: 0.6rem; }
.step p:not(.step-num) { margin-top: 0.55rem; font-size: 0.9375rem; color: var(--ink-soft); }

/* ---------- Honest coach panel (the one dark moment) ---------- */

.coach-panel {
  background: var(--ink);
  color: var(--paper);
}

.coach-inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 6rem) var(--pad);
}

.coach-panel .section-sub { color: rgba(250, 247, 240, 0.72); }

.coach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 3vw, 3rem);
  margin-top: 2.75rem;
}

.coach-point h3 {
  font-size: 1.25rem;
  padding-top: 0.9rem;
  border-top: 2px solid var(--marigold);
}
.coach-point p {
  margin-top: 0.7rem;
  font-size: 0.9375rem;
  color: rgba(250, 247, 240, 0.78);
}

.best-guess {
  font-style: italic;
  color: var(--marigold);
}

/* ---------- Pricing ---------- */

.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 2.5vw, 2rem);
  margin-top: 2.75rem;
  align-items: start;
}

.plan {
  background: #FFFDF8;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.9rem 1.7rem;
  display: flex;
  flex-direction: column;
}

.plan-featured {
  border: 2px solid var(--marigold);
  box-shadow: 0 18px 40px -24px rgba(27, 42, 65, 0.4);
}

.plan-flag {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--marigold-deep);
  margin-bottom: 0.5rem;
}

.plan h3 { font-size: 1.35rem; }

.price {
  font-family: var(--display);
  font-size: 2.3rem;
  font-weight: 600;
  margin-top: 0.5rem;
  line-height: 1;
}
.price span { font-size: 1rem; font-family: var(--body); font-weight: 500; color: var(--ink-soft); }
.price-note { font-size: 0.875rem; color: var(--ink-soft); margin-top: 0.35rem; }

.plan ul {
  list-style: none;
  padding: 0;
  margin: 1.3rem 0 1.6rem;
  font-size: 0.9375rem;
  flex: 1;
}
.plan li {
  padding: 0.4rem 0 0.4rem 1.4rem;
  position: relative;
}
.plan li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 0.5em;
  height: 0.5em;
  border-radius: 50%;
  border: 1.5px solid var(--marigold-deep);
}

.plan .btn { text-align: center; }

.plan-note {
  margin-top: 0.9rem;
  font-size: 0.8125rem;
  color: var(--ink-soft);
}

/* ---------- FAQ ---------- */

.faq { border-top: 1px solid var(--line); max-width: 52rem; }

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 1.1rem 0;
}
.faq details:first-of-type { margin-top: 2rem; border-top: 1px solid var(--line); }

.faq summary {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.15rem;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 2rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0.25rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--body);
  font-weight: 400;
  font-size: 1.4rem;
  color: var(--marigold-deep);
}
.faq details[open] summary::after { content: "−"; }

.faq details p {
  margin-top: 0.8rem;
  color: var(--ink-soft);
  font-size: 0.9688rem;
  max-width: var(--measure);
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
  padding: 2.5rem var(--pad);
}

.honor-line {
  max-width: 72rem;
  margin: 0 auto;
  font-family: var(--display);
  font-size: 1.1rem;
}

.footer-row {
  max-width: 72rem;
  margin: 1.5rem auto 0;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--ink-soft);
}
.footer-row nav { display: flex; gap: 1.4rem; }
.footer-row a { color: var(--ink-soft); text-decoration: none; }
.footer-row a:hover { color: var(--ink); }

/* ---------- Responsive ---------- */

@media (max-width: 56rem) {
  .hero { grid-template-columns: 1fr; }
  .steps, .coach-grid, .plans { grid-template-columns: 1fr; }
  .site-nav { display: none; }
  .site-header { justify-content: space-between; }
  .viewfinder { max-width: 30rem; }
}