/* etudia/styles.css
   Etudia's own editorial system, shared across all its pages — a warm
   paper-cream palette with near-black ink and a brass accent, sampled
   directly from the app's real icon rather than inherited from either
   the dark Fuyu Labs homepage or the older cream/gradient template the
   other product pages (Lotus, BambooReader, Speakeasy) still use.
   Structure (hairline dividers, wide-tracked uppercase type, ghost
   numerals) still echoes the Fuyu Labs system's quality bar; the color
   identity is Etudia's alone.
*/

:root {
  /* Etudia's own palette — pulled directly from the app icon (a warm
     paper cream behind a near-black note glyph), not inherited from the
     Fuyu Labs homepage's dark editorial system. Reads like manuscript
     paper: light, warm, ink-on-paper. */
  --bg: #fcf7f3;
  --bg-raised: #f4ede3;
  --bg-sunken: #ece1d2;
  /* Solid, contrast-checked grays rather than alpha blends — an
     opacity that reads as a tasteful "faint" against a near-black
     background (the Fuyu Labs system this was ported from) washes out
     to illegible pale gray on this light cream background instead.
     Every tier below still meets at least ~4.5:1 against --bg. */
  --ink: #2c2c2b;
  --ink-mid: #524d43;
  --ink-dim: #453f36;
  --ink-faint: #6f695c;
  --hairline: rgba(44, 42, 38, 0.16);
  --hairline-soft: rgba(44, 42, 38, 0.09);
  --accent: #8a5b1c;
  --accent-ink: #fcf7f3;
  --accent-soft: rgba(138, 91, 28, 0.09);
  --accent-line: rgba(138, 91, 28, 0.4);
  --serif: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max: 860px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--serif);
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  font-weight: 300;
  line-height: 1.7;
  max-width: 100vw;
}

h1, h2, h3, p, .eyebrow, .legal-meta, .nav-badge, .score-caption {
  overflow-wrap: break-word;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.75rem;
}

/* ---------- Navigation ---------- */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.4rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(252, 247, 243, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s ease, background 0.4s ease;
}

nav.scrolled {
  border-bottom-color: var(--hairline-soft);
  background: rgba(252, 247, 243, 0.94);
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.nav-back {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  transition: color 0.25s ease;
  white-space: nowrap;
}
.nav-back:hover { color: var(--ink-mid); }

.nav-divider {
  width: 1px;
  height: 14px;
  background: var(--hairline);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.85rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
}

.nav-brand img {
  width: 20px;
  height: 20px;
  border-radius: 5px;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
  transition: color 0.25s ease;
}
.nav-links a:hover { color: var(--ink); }

.nav-badge {
  border: 1px solid var(--accent-line);
  color: var(--accent);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.62rem;
}

@media (max-width: 680px) {
  .nav-links li:not(.nav-badge-item) { display: none; }
}

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

.hero {
  position: relative;
  padding: 9.5rem 1.75rem 5rem;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 50% 0%, var(--accent-soft) 0%, transparent 65%);
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  position: relative;
  z-index: 2;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.75rem;
}
.eyebrow::before, .eyebrow::after {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--accent-line);
}

.hero h1 {
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: clamp(1.8rem, 8vw, 4.6rem);
  line-height: 1.2;
  color: var(--ink);
  overflow-wrap: break-word;
}

@media (max-width: 480px) {
  .hero h1 {
    letter-spacing: 0.06em;
  }
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero-tagline {
  margin: 1.75rem auto 0;
  max-width: 560px;
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  font-weight: 300;
  color: var(--ink-mid);
  line-height: 1.75;
}

.hero-cta {
  margin-top: 2.75rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.95rem 1.9rem;
  border-radius: 999px;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 500;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(138, 91, 28, 0.28);
}

.btn-ghost {
  border-color: var(--hairline);
  color: var(--ink-mid);
}
.btn-ghost:hover {
  border-color: var(--ink-faint);
  color: var(--ink);
}

/* ---------- Score visual ---------- */

.score-visual {
  margin: 4.5rem auto 0;
  max-width: 640px;
  position: relative;
}

.score-visual svg {
  width: 100%;
  height: auto;
  display: block;
}

.score-caption {
  margin-top: 1.1rem;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  text-align: center;
}

.cursor-bar {
  animation: sweep 4.5s ease-in-out infinite;
}

@keyframes sweep {
  0%, 8% { transform: translateX(0); opacity: 0.85; }
  46%, 54% { transform: translateX(420px); opacity: 0.85; }
  92%, 100% { transform: translateX(0); opacity: 0.85; }
}

@media (prefers-reduced-motion: reduce) {
  .cursor-bar { animation: none; }
}

/* ---------- Section marker (rule / label / rule) ---------- */

.marker {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 4rem;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}
.marker.in-view { opacity: 1; transform: translateY(0); }

.marker .line { flex: 1; height: 1px; background: var(--hairline); }
.marker .label {
  font-size: 0.62rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-mid);
  white-space: nowrap;
}

section {
  padding: 6rem 0;
  position: relative;
}

.section-alt { background: var(--bg-raised); }

.section-lead {
  max-width: 560px;
  font-weight: 300;
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 3.5rem;
}
.section-lead .accent { color: var(--accent); }

/* ---------- Feature rows ---------- */

.rows { }

.row {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.row.in-view { opacity: 1; transform: translateY(0); }

.row-rule { height: 1px; background: var(--hairline-soft); }

.row-inner {
  position: relative;
  padding: 2rem 0;
  display: flex;
  align-items: flex-start;
  gap: 1.75rem;
  overflow: hidden;
}

.row-ghost {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: clamp(4.5rem, 11vw, 8rem);
  font-weight: 300;
  color: rgba(44, 42, 38, 0.045);
  letter-spacing: -0.04em;
  pointer-events: none;
  line-height: 1;
}

.row-index {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--accent);
  width: 2rem;
  flex-shrink: 0;
  padding-top: 0.2rem;
}

.row-body h3 {
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--ink);
  margin-bottom: 0.6rem;
}

.row-body p {
  font-size: 0.92rem;
  color: var(--ink-mid);
  max-width: 480px;
  font-weight: 300;
}

/* ---------- Steps (how it works) ---------- */

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 720px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
}

.step {
  border-top: 1px solid var(--hairline);
  padding-top: 1.5rem;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.step.in-view { opacity: 1; transform: translateY(0); }

.step-num {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--accent);
  display: block;
  margin-bottom: 0.9rem;
}

.step h3 {
  font-weight: 400;
  font-size: 1.02rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
  color: var(--ink);
}

.step p {
  font-size: 0.88rem;
  color: var(--ink-mid);
  font-weight: 300;
}

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

.pricing-card {
  border: 1px solid var(--hairline);
  border-radius: 18px;
  padding: 2.5rem;
  background: linear-gradient(160deg, rgba(138, 91, 28, 0.07), transparent 60%);
}

.pricing-card h3 {
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--ink);
}

.pricing-card p {
  color: var(--ink-mid);
  font-size: 0.9rem;
  font-weight: 300;
  max-width: 520px;
}

.pricing-tiers {
  margin-top: 1.75rem;
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.pricing-tiers div {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.pricing-tiers strong {
  display: block;
  color: var(--ink);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  margin-bottom: 0.3rem;
  font-weight: 400;
}

/* ---------- Closing CTA ---------- */

.closing {
  text-align: center;
  padding: 7rem 0;
}

.closing h2 {
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  color: var(--ink);
  max-width: 620px;
  margin: 0 auto 1.25rem;
}

.closing p {
  color: var(--ink-mid);
  max-width: 480px;
  margin: 0 auto 2.5rem;
  font-weight: 300;
}

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

footer {
  padding: 3.5rem 1.75rem 2.5rem;
  background: var(--bg-sunken);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--hairline-soft);
  margin-bottom: 1.75rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.footer-brand img { width: 18px; height: 18px; border-radius: 4px; }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.75rem;
}

.footer-links a {
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  transition: color 0.25s ease;
}
.footer-links a:hover { color: var(--ink); }

.footer-bottom {
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  text-align: center;
}

.footer-bottom a { text-decoration: underline; text-underline-offset: 2px; }
.footer-bottom a:hover { color: var(--ink-mid); }

/* ---------- Legal pages (privacy / terms / support) ---------- */

.legal-header {
  padding: 9.5rem 1.75rem 3rem;
  text-align: center;
}

.legal-header .eyebrow { margin-bottom: 1.25rem; }

.legal-header h1 {
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: clamp(2rem, 6vw, 3rem);
  color: var(--ink);
}

.legal-header .subtitle {
  margin: 1.25rem auto 0;
  max-width: 520px;
  color: var(--ink-mid);
  font-size: 0.95rem;
  font-weight: 300;
}

.legal-meta {
  display: inline-block;
  margin-top: 1.75rem;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.legal-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.75rem 6rem;
}

.legal-body h2 {
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 1.1rem;
  color: var(--ink);
  margin: 3rem 0 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--hairline);
}

.legal-body h2:first-child { margin-top: 0; }

.legal-body h3 {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--accent);
  margin: 1.75rem 0 0.75rem;
  letter-spacing: 0.02em;
}

.legal-body p {
  color: var(--ink-mid);
  font-size: 0.92rem;
  font-weight: 300;
  margin-bottom: 1rem;
}

.legal-body ul, .legal-body ol {
  margin: 0.5rem 0 1.25rem 1.3rem;
  color: var(--ink-mid);
  font-size: 0.92rem;
  font-weight: 300;
}

.legal-body li { margin-bottom: 0.55rem; }

.legal-body strong { color: var(--ink); font-weight: 500; }

.legal-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.legal-body a:hover { color: var(--ink); }

.callout {
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  border-radius: 12px;
  padding: 1.5rem 1.75rem;
  margin: 1.75rem 0;
}
.callout p:last-child { margin-bottom: 0; }
.callout strong { color: var(--accent); }

.callout-warn {
  border-color: rgba(179, 74, 48, 0.45);
  background: rgba(179, 74, 48, 0.09);
}
.callout-warn strong { color: #a3391f; }

.legal-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.85rem;
}
.legal-body th, .legal-body td {
  text-align: left;
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid var(--hairline-soft);
  color: var(--ink-mid);
  font-weight: 300;
}
.legal-body th {
  color: var(--ink);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.68rem;
}

.legal-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin: 2rem 0 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid var(--hairline-soft);
}
.legal-toc a {
  font-size: 0.72rem;
  color: var(--ink-dim);
}
.legal-toc a:hover { color: var(--accent); }

.back-home {
  display: inline-block;
  margin-top: 3rem;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.back-home:hover { color: var(--accent); }