/* =========================================================================
   SemantiNote — marketing site styles
   Brand mirrors the app: purple gradient + OneNote-neutral darks.
   ========================================================================= */

:root {
  /* Brand */
  --purple: #6b5fc4;
  --purple-2: #8a63e8;
  --purple-1: #5b52d6;
  --accent: #a99be6;
  --grad: linear-gradient(135deg, #5b52d6 0%, #8a63e8 100%);

  /* Surfaces (dark, OneNote-neutral) */
  --bg: #191919;
  --bg-2: #1f1f1f;
  --bg-3: #262626;
  --card: #222224;
  --border: #333336;
  --border-2: #3d3d42;

  /* Text */
  --text: #ededf0;
  --muted: #a0a0a8;
  --dim: #74747c;

  --radius: 16px;
  --radius-lg: 22px;
  --shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.7);
  --shadow-soft: 0 8px 30px -12px rgba(0, 0, 0, 0.5);
  --maxw: 1140px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* Ambient background glow */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 50% at 78% -5%, rgba(138, 99, 232, 0.16), transparent 60%),
    radial-gradient(45% 40% at 10% 8%, rgba(91, 82, 214, 0.12), transparent 60%);
  pointer-events: none;
}

/* ---------------------------------------------------------------- Typography */
h1, h2, h3 { line-height: 1.12; letter-spacing: -0.02em; font-weight: 700; }
h2.section-title { font-size: clamp(28px, 4vw, 42px); }
.eyebrow {
  display: inline-block;
  font-size: 13px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 14px;
}
.lead { font-size: clamp(16px, 2vw, 19px); color: var(--muted); }
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* ---------------------------------------------------------------- Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 15px; font-weight: 600;
  padding: 13px 22px; border-radius: 12px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform 0.18s var(--ease), box-shadow 0.2s var(--ease), background 0.2s, border-color 0.2s;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 10px 30px -8px rgba(107, 95, 196, 0.7); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 38px -10px rgba(107, 95, 196, 0.85); }
.btn-ghost { background: rgba(255, 255, 255, 0.04); color: var(--text); border-color: var(--border-2); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); transform: translateY(-2px); }
.btn-lg { padding: 16px 28px; font-size: 16px; border-radius: 14px; }

/* ---------------------------------------------------------------- Nav */
.nav {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: saturate(160%) blur(14px);
  background: rgba(20, 20, 22, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
.brand img { width: 32px; height: 32px; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { color: var(--muted); font-size: 15px; font-weight: 500; transition: color 0.15s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-toggle { display: none; background: none; border: none; color: var(--text); cursor: pointer; padding: 6px; }
.nav-toggle svg { width: 26px; height: 26px; }

/* ---------------------------------------------------------------- Hero */
.hero { position: relative; padding: clamp(56px, 9vw, 110px) 0 40px; text-align: center; }
.hero h1 { font-size: clamp(38px, 6.4vw, 74px); max-width: 16ch; margin: 0 auto 22px; }
.hero .lead { max-width: 62ch; margin: 0 auto 32px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-note { margin-top: 16px; font-size: 13.5px; color: var(--dim); }
.hero-shot { margin-top: clamp(40px, 6vw, 72px); }

/* Window frame around screenshots */
.frame {
  border-radius: 14px; overflow: hidden;
  border: 1px solid var(--border-2);
  background: var(--bg-3);
  box-shadow: var(--shadow);
}
.frame-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 11px 14px; background: #2a2a2d; border-bottom: 1px solid var(--border);
}
.frame-bar i { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.frame-bar i:nth-child(1) { background: #ff5f57; }
.frame-bar i:nth-child(2) { background: #febc2e; }
.frame-bar i:nth-child(3) { background: #28c840; }
.frame-bar span { margin-left: 10px; font-size: 12px; color: var(--dim); }
.frame img { width: 100%; display: block; }
/* Placeholder shown until a real screenshot is dropped in */
.frame .ph {
  aspect-ratio: 16 / 10; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 10px;
  color: var(--dim); background:
    linear-gradient(135deg, rgba(107,95,196,0.10), rgba(138,99,232,0.05)),
    repeating-linear-gradient(45deg, transparent 0 12px, rgba(255,255,255,0.015) 12px 24px);
  font-size: 14px; text-align: center; padding: 24px;
}
.frame .ph svg { width: 42px; height: 42px; opacity: 0.5; }
.hero-shot .frame { max-width: 1000px; margin: 0 auto; }

/* ---------------------------------------------------------------- Trust strip */
.trust { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: rgba(255,255,255,0.015); }
.trust-inner { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 40px; padding: 22px 0; }
.trust-item { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 14.5px; font-weight: 500; }
.trust-item svg { width: 19px; height: 19px; color: var(--accent); flex-shrink: 0; }

/* ---------------------------------------------------------------- Sections */
section { padding: clamp(64px, 9vw, 110px) 0; }
.section-head { text-align: center; max-width: 64ch; margin: 0 auto clamp(40px, 6vw, 64px); }
.section-head .lead { margin-top: 16px; }

/* How it works */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.step { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 22px; position: relative; }
.step-num {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  background: var(--grad); color: #fff; font-weight: 700; font-size: 16px; margin-bottom: 16px;
}
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 14.5px; }

/* Feature highlight cards (home) */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feat-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 24px; transition: transform 0.2s var(--ease), border-color 0.2s, box-shadow 0.2s;
}
.feat-card:hover { transform: translateY(-4px); border-color: var(--border-2); box-shadow: var(--shadow-soft); }
.feat-icon {
  width: 48px; height: 48px; border-radius: 13px; display: grid; place-items: center; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(107,95,196,0.22), rgba(138,99,232,0.12));
  border: 1px solid rgba(138,99,232,0.28);
}
.feat-icon svg { width: 24px; height: 24px; color: var(--accent); }
.feat-card h3 { font-size: 18.5px; margin-bottom: 9px; }
.feat-card p { color: var(--muted); font-size: 14.5px; }

/* Alternating feature rows (features page + home deep sections) */
.feat-row { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 72px); align-items: center; }
.feat-row + .feat-row { margin-top: clamp(64px, 9vw, 120px); }
.feat-row.reverse .feat-row-text { order: 2; }
.feat-row-text .eyebrow { margin-bottom: 12px; }
.feat-row-text h2 { font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 16px; }
.feat-row-text p { color: var(--muted); font-size: 16.5px; margin-bottom: 14px; }
.feat-list { list-style: none; margin-top: 18px; display: flex; flex-direction: column; gap: 11px; }
.feat-list li { display: flex; gap: 11px; align-items: flex-start; color: var(--text); font-size: 15px; }
.feat-list li svg { width: 20px; height: 20px; color: #4ecb8d; flex-shrink: 0; margin-top: 2px; }

/* Comparison chips (semantic vs keyword) */
.vs { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.vs-chip { border: 1px solid var(--border-2); border-radius: 12px; padding: 14px 16px; flex: 1; min-width: 180px; background: var(--bg-2); }
.vs-chip .k { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--dim); margin-bottom: 6px; }
.vs-chip.good { border-color: rgba(78,203,141,0.4); background: rgba(78,203,141,0.06); }
.vs-chip p { font-size: 14px; color: var(--muted); margin: 0; }

/* Privacy banner */
.privacy {
  background: linear-gradient(135deg, rgba(91,82,214,0.14), rgba(138,99,232,0.06));
  border: 1px solid rgba(138,99,232,0.25); border-radius: var(--radius-lg);
  padding: clamp(36px, 6vw, 64px); text-align: center;
}
.privacy .lock { width: 60px; height: 60px; margin: 0 auto 22px; color: var(--accent); }
.privacy h2 { font-size: clamp(26px, 3.6vw, 40px); margin-bottom: 16px; max-width: 20ch; margin-inline: auto; }
.privacy p { color: var(--muted); font-size: 17px; max-width: 58ch; margin: 0 auto; }

/* Platforms */
.platforms { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-top: 30px; }
.platform { display: flex; align-items: center; gap: 11px; background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px 24px; font-weight: 600; }
.platform svg { width: 26px; height: 26px; color: var(--text); }
.platform small { display: block; color: var(--dim); font-weight: 400; font-size: 12.5px; }

/* Final CTA */
.cta-final { text-align: center; }
.cta-final h2 { font-size: clamp(30px, 5vw, 52px); margin-bottom: 18px; }
.cta-final .lead { max-width: 52ch; margin: 0 auto 30px; }

/* ---------------------------------------------------------------- Download page */
.dl-hero { text-align: center; padding-top: clamp(48px, 7vw, 84px); }
.dl-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; max-width: 780px; margin: 44px auto 0; }
.dl-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 34px 28px; text-align: center; }
.dl-card.recommended { border-color: rgba(138,99,232,0.5); box-shadow: var(--shadow-soft); position: relative; }
.dl-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--grad); color: #fff; font-size: 12px; font-weight: 600; padding: 5px 14px; border-radius: 20px; }
.dl-os { width: 56px; height: 56px; margin: 0 auto 16px; color: var(--text); }
.dl-card h3 { font-size: 22px; margin-bottom: 6px; }
.dl-card .dl-sub { color: var(--dim); font-size: 14px; margin-bottom: 22px; }
.dl-card .btn { width: 100%; justify-content: center; }
.dl-soon { font-size: 12.5px; color: var(--dim); margin-top: 12px; }
.dl-meta { max-width: 780px; margin: 40px auto 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.dl-meta div { background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px; padding: 18px; text-align: center; }
.dl-meta .k { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--dim); margin-bottom: 6px; }
.dl-meta .v { font-weight: 600; }
.dl-req { max-width: 780px; margin: 40px auto 0; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.dl-req h3 { font-size: 18px; margin-bottom: 14px; }
.dl-req ul { list-style: none; display: grid; gap: 10px; }
.dl-req li { display: flex; gap: 10px; color: var(--muted); font-size: 14.5px; }
.dl-req li svg { width: 18px; height: 18px; color: var(--accent); flex-shrink: 0; margin-top: 3px; }

/* ---------------------------------------------------------------- Footer */
.footer { border-top: 1px solid var(--border); padding: 56px 0 40px; margin-top: 40px; }
.footer-inner { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.footer .brand { margin-bottom: 14px; }
.footer-tag { color: var(--muted); font-size: 14px; max-width: 34ch; }
.footer-cols { display: flex; gap: 60px; flex-wrap: wrap; }
.footer-col h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--dim); margin-bottom: 14px; }
.footer-col a { display: block; color: var(--muted); font-size: 14.5px; margin-bottom: 10px; transition: color 0.15s; }
.footer-col a:hover { color: var(--text); }
.footer-bottom { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); color: var(--dim); font-size: 13px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* ---------------------------------------------------------------- Scroll reveal
   Hidden state applies ONLY when JS is active (html.js) so no-JS users always
   see the content. JS reveals each element as it scrolls into view. */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------------------------------------------------------------- Responsive */
@media (max-width: 940px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .nav-links, .nav-cta .btn { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav[data-open="true"] .nav-links {
    display: flex; flex-direction: column; gap: 4px;
    position: absolute; top: 68px; left: 0; right: 0;
    background: rgba(20,20,22,0.98); border-bottom: 1px solid var(--border); padding: 14px 24px 20px;
  }
  .nav[data-open="true"] .nav-links a { padding: 10px 0; font-size: 16px; }
  .feat-row, .feat-row.reverse .feat-row-text { grid-template-columns: 1fr; order: 0; }
  .feat-row .frame { order: -1; }
  .feat-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .dl-cards { grid-template-columns: 1fr; }
  .dl-meta { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
}

/* One-time price callout (home value section) — boxed card */
.price-callout {
  text-align: center;
  margin: clamp(28px, 4vw, 44px) auto 0;
  max-width: 620px;
  background: var(--card);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: clamp(30px, 4vw, 46px);
  box-shadow: var(--shadow-soft);
}
.price-big { font-size: clamp(30px, 5vw, 46px); font-weight: 800; letter-spacing: -0.02em; color: var(--text); }
.price-sub { color: var(--muted); margin: 14px auto 24px; max-width: 46ch; font-size: 15px; line-height: 1.6; }

/* Sale pricing + satisfaction guarantee */
.price-was { text-decoration: line-through; text-decoration-thickness: 2px; color: var(--dim); font-weight: 600; }
.price-sale-tag { display: inline-block; background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); font-weight: 700; font-size: 13px; padding: 5px 13px; border-radius: 999px; margin-bottom: 14px; }
.price-guarantee { color: var(--muted); font-size: 13.5px; margin: 16px auto 0; max-width: 48ch; line-height: 1.55; }

/* Contact / support form */
.sn-form { display: flex; flex-direction: column; gap: 14px; max-width: 480px; margin: 0 auto; }
.sn-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; font-weight: 600; color: var(--text); }
.sn-form input, .sn-form select, .sn-form textarea {
  font: inherit; font-weight: 400; font-size: 14.5px; color: var(--text);
  background: var(--bg-2); border: 1px solid var(--border-2); border-radius: 10px; padding: 11px 13px; width: 100%; box-sizing: border-box;
}
.sn-form input:focus, .sn-form select:focus, .sn-form textarea:focus { outline: none; border-color: var(--accent); }
.sn-form textarea { resize: vertical; }
.sn-form .btn { align-self: flex-start; margin-top: 2px; }
.form-status { font-size: 14px; margin: 6px 0 0; display: none; }
.form-status.ok { display: block; color: #4ecb8d; }
.form-status.err { display: block; color: #e08472; }

/* Legal pages */
.legal { max-width: 760px; text-align: left; }
.legal h1 { text-align: left; }
.legal-updated { color: var(--dim); font-size: 13px; margin: 6px 0 22px; }
.legal-lead { background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; margin-bottom: 24px; }
.legal-lead p { color: var(--muted); font-size: 15.5px; margin: 0; line-height: 1.6; }
.legal h2 { font-size: 19px; margin: 26px 0 8px; color: var(--text); }
.legal > p { color: var(--muted); font-size: 15px; line-height: 1.65; margin: 0 0 10px; }
.legal-list { color: var(--muted); font-size: 15px; line-height: 1.65; padding-left: 20px; margin: 0 0 10px; }
.legal-list li { margin-bottom: 8px; }
.legal-link { color: var(--accent); }
.legal-foot-links { margin-top: 32px; padding-top: 18px; border-top: 1px solid var(--border); font-size: 14px; }
.legal-foot-links a { color: var(--accent); }

/* "See it in action" auto-rotating screenshot showcase */
.showcase { max-width: 900px; margin: 0 auto; }
.showcase-frame { position: relative; border: 1px solid var(--border-2); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-soft); background: var(--bg-2); aspect-ratio: 16 / 10; }
.showcase-slide { position: absolute; inset: 0; opacity: 0; transition: opacity 0.6s ease; pointer-events: none; }
.showcase-slide.active { opacity: 1; }
.showcase-slide img, .showcase-slide video { width: 100%; height: 100%; object-fit: contain; display: block; }
.showcase-caption { text-align: center; color: var(--muted); font-size: 14.5px; margin-top: 16px; min-height: 1.4em; font-weight: 500; }
.showcase-dots { display: flex; gap: 9px; justify-content: center; margin-top: 12px; }
.showcase-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--border-2); border: none; padding: 0; cursor: pointer; transition: background 0.2s, transform 0.2s; }
.showcase-dot.active { background: var(--accent); transform: scale(1.2); }
.showcase-nav {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid var(--border-2); background: rgba(20, 20, 22, 0.62);
  color: var(--text); font-size: 24px; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
  opacity: 0.6; transition: opacity 0.2s, background 0.2s, border-color 0.2s;
}
.showcase-frame:hover .showcase-nav { opacity: 1; }
.showcase-nav:hover { background: var(--grad); border-color: transparent; opacity: 1; }
.showcase-nav.prev { left: 12px; padding-right: 3px; }
.showcase-nav.next { right: 12px; padding-left: 3px; }

/* ---------- Mission / Why ---------- */
.mission-statement { max-width: 820px; margin: 0 auto 40px; text-align: center; }
.mission-statement p { font-size: 18px; line-height: 1.7; color: var(--text); }
.mission-statement .mission-punch { margin-top: 18px; font-size: 20px; font-weight: 600; color: var(--muted); }
.mission-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 34px; }
.mission-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 20px; }
.mission-card h3 { font-size: 16.5px; margin-bottom: 8px; }
.mission-card p { color: var(--muted); font-size: 14.5px; line-height: 1.6; }
.mission-who { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; max-width: 900px; margin: 0 auto; }
.who-card { background: var(--bg-2); border: 1px solid var(--border-2); border-radius: var(--radius); padding: 22px 24px; }
.who-tag { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: #fff; background: var(--grad); padding: 4px 10px; border-radius: 999px; margin-bottom: 12px; }
.who-card p { color: var(--muted); font-size: 15px; line-height: 1.65; }

/* ---------- Incentives / Nothing to lose ---------- */
.try-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 30px; }
.try-card { position: relative; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 20px; }
.try-check { width: 30px; height: 30px; border-radius: 50%; background: rgba(94, 200, 130, 0.15); color: #5ec882; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 16px; margin-bottom: 14px; }
.try-card h3 { font-size: 17px; margin-bottom: 8px; }
.try-card p { color: var(--muted); font-size: 14.5px; line-height: 1.6; }
.try-cta { text-align: center; }
.try-note { display: block; margin-top: 14px; color: var(--dim); font-size: 14px; }

@media (max-width: 860px) {
  .mission-grid, .try-grid { grid-template-columns: 1fr 1fr; }
  .mission-who { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .mission-grid, .try-grid { grid-template-columns: 1fr; }
}