/* satinbook.com — the product page. Noir: near-black, white type, one pink accent. */
:root {
  --bg: #0A0A0B;
  --bg-2: #111113;
  --card: #151517;
  --card-2: #1D1D20;
  --text: #FFFFFF;
  --text-2: #A1A1A6;
  --text-3: #6E6E73;
  --line: rgba(255, 255, 255, .08);
  --line-2: rgba(255, 255, 255, .14);
  --accent: #F4A6B8;
  --accent-ink: #1A0A0F;
  --ok: #7DDBA3;
  --err: #FF8A80;
  --r: 22px;
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --serif: 'Fraunces', Georgia, 'Times New Roman', serif;
  --ease: cubic-bezier(.25, .8, .25, 1);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 400 17px/1.55 var(--font); letter-spacing: -.006em;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -.025em; line-height: 1.08; }
p { margin: 0; }
.nowrap { white-space: nowrap; }

.skip { position: absolute; left: -999px; top: 8px; z-index: 50; padding: 10px 14px; border-radius: 10px; background: var(--text); color: var(--bg); }
.skip:focus { left: 16px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.wrap--narrow { max-width: 760px; }
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; }
.lead { font-size: 19px; color: var(--text-2); max-width: 36em; }
.fine { font-size: 14px; color: var(--text-3); margin-top: 14px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 54px; padding: 0 26px; border-radius: 999px; border: 0;
  font: 600 16px/1 var(--font); letter-spacing: -.01em; text-decoration: none; white-space: nowrap;
  cursor: pointer; transition: transform .2s var(--ease), background .2s, box-shadow .2s, opacity .2s;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(.97); }
.btn--accent { background: var(--accent); color: var(--accent-ink); box-shadow: 0 10px 34px -12px rgba(244, 166, 184, .7); }
.btn--accent:hover { box-shadow: 0 14px 40px -10px rgba(244, 166, 184, .85); }
.btn--light { background: var(--text); color: var(--bg); }
.btn--ghost { background: rgba(255, 255, 255, .06); color: var(--text); box-shadow: inset 0 0 0 1px var(--line-2); }
.btn--ghost:hover { background: rgba(255, 255, 255, .1); }
.btn--sm { height: 40px; padding: 0 18px; font-size: 15px; }
.btn--wide { width: 100%; }
.btn[disabled] { opacity: .55; pointer-events: none; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  padding-top: env(safe-area-inset-top);
  background: rgba(10, 10, 11, .72);
  -webkit-backdrop-filter: blur(20px) saturate(160%); backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid transparent; transition: border-color .3s;
}
.nav.is-scrolled { border-bottom-color: var(--line); }
.nav__in { display: flex; align-items: center; gap: 24px; height: 64px; }
.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.logo img { border-radius: 8px; box-shadow: 0 0 0 1px var(--line-2); }
.logo span { font: 500 22px/1 var(--serif); letter-spacing: -.02em; }
.nav__links { display: flex; gap: 26px; margin-left: auto; }
.nav__links a { font-size: 15px; color: var(--text-2); text-decoration: none; transition: color .2s; }
.nav__links a:hover { color: var(--text); }
@media (max-width: 760px) {
  .nav__links { display: none; }
  .nav .btn { margin-left: auto; }
}

/* ---------- Hero ---------- */
.hero { position: relative; padding: 48px 0 24px; overflow: hidden; }
.hero__in { display: grid; grid-template-columns: 1.08fr .92fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(40px, 6vw, 68px); }
.hero h1 em { display: block; font: italic 400 1em/1.08 var(--serif); letter-spacing: -.02em; color: var(--accent); margin-top: .12em; }
.hero .lead { margin-top: 24px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero__art { position: relative; display: grid; place-items: center; min-height: 560px; }
.glow {
  position: absolute; inset: 8% 0 0; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(244, 166, 184, .26), rgba(244, 166, 184, 0) 70%);
  filter: blur(10px); pointer-events: none;
}

/* the phone */
.phone {
  position: relative; width: 300px; aspect-ratio: 390 / 844; border-radius: 46px; padding: 9px;
  background: linear-gradient(160deg, #2A2A2E, #121214 40%, #1E1E21);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .1), 0 50px 100px -30px rgba(0, 0, 0, .9), 0 30px 60px -40px rgba(244, 166, 184, .35);
}
.phone::before { /* the island */
  content: ''; position: absolute; top: 17px; left: 50%; z-index: 2; width: 84px; height: 24px; margin-left: -42px;
  border-radius: 20px; background: #000;
}
.phone img { width: 100%; height: 100%; object-fit: cover; object-position: top; border-radius: 38px; background: #000; }
.phone--hero { transform: rotate(2deg); }

.float {
  position: absolute; z-index: 3; display: flex; align-items: center; gap: 12px;
  padding: 12px 16px 12px 12px; border-radius: 20px;
  background: rgba(30, 30, 33, .82); -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .1), 0 20px 40px -16px rgba(0, 0, 0, .8);
  font-size: 13px; line-height: 1.35; animation: bob 6s ease-in-out infinite;
}
.float img { border-radius: 9px; flex: none; }
.float b { display: flex; justify-content: space-between; gap: 18px; font-weight: 600; font-size: 14px; }
.float b i { font-style: normal; font-weight: 400; color: var(--text-3); }
.float span { display: block; color: var(--text-2); }
.float--push { top: 12%; left: -6%; max-width: 290px; }
.float--pay { bottom: 14%; right: -2%; animation-delay: -3s; }
.float .dot { width: 34px; height: 34px; border-radius: 50%; flex: none; background: radial-gradient(circle, var(--ok) 0 6px, rgba(125, 219, 163, .16) 7px); }
@keyframes bob { 50% { transform: translateY(-8px); } }

@media (max-width: 900px) {
  .hero { padding-top: 32px; }
  .hero__in { grid-template-columns: 1fr; gap: 24px; }
  .hero__art { min-height: 0; padding: 24px 0 8px; }
  .phone--hero { width: min(270px, 72vw); }
  .float--push { left: 0; top: 10%; max-width: 250px; }
  .float--pay { right: 0; bottom: 12%; }
}
@media (max-width: 420px) {
  .hero .lead { font-size: 17px; margin-top: 18px; }
  .hero__cta { margin-top: 26px; }
  .hero__cta .btn { width: 100%; }
  .float { font-size: 12px; padding: 10px 12px 10px 10px; }
  .float b { font-size: 13px; }
  .float img, .float .dot { width: 28px; height: 28px; }
}

/* ---------- Sections ---------- */
.sec { padding: 64px 0; }
.sec h2 { font-size: clamp(32px, 4.4vw, 48px); max-width: 18em; }
@media (max-width: 760px) { .sec { padding: 44px 0; } }

/* problem → solution */
.pains { list-style: none; margin: 40px 0 0; padding: 0; display: grid; gap: 14px; }
.pain { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; border-radius: var(--r); overflow: hidden; background: var(--line); }
.pain > div { padding: 26px 28px; background: var(--card); }
.pain__a { background: linear-gradient(135deg, #1A1517, var(--card)) !important; }
.pain p { font-size: 18px; }
.pain__q p { color: var(--text-2); }
.pain__tag { display: inline-block; margin-bottom: 10px; font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--text-3); }
.pain__tag--ok { color: var(--accent); }
@media (max-width: 760px) {
  .pain { grid-template-columns: 1fr; }
  .pain > div { padding: 20px 22px; }
  .pain p { font-size: 17px; }
}

/* features */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 40px; }
.feat { padding: 26px; border-radius: var(--r); background: var(--card); box-shadow: inset 0 0 0 1px var(--line); transition: transform .3s var(--ease), box-shadow .3s; }
.feat:hover { transform: translateY(-3px); box-shadow: inset 0 0 0 1px var(--line-2); }
.feat svg { width: 44px; height: 44px; padding: 10px; border-radius: 13px; background: rgba(244, 166, 184, .12);
            fill: none; stroke: var(--accent); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.feat h3 { margin-top: 18px; font-size: 19px; letter-spacing: -.015em; }
.feat p { margin-top: 8px; font-size: 15.5px; color: var(--text-2); }
@media (max-width: 900px) { .grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; gap: 10px; }
  .feat { display: grid; grid-template-columns: 44px 1fr; column-gap: 16px; padding: 20px; }
  .feat svg { grid-row: span 2; }
  .feat h3 { margin-top: 0; font-size: 17px; align-self: center; }
  .feat p { margin-top: 4px; font-size: 15px; }
}

/* demo */
.demo { background: linear-gradient(180deg, var(--bg), var(--bg-2) 30%, var(--bg-2) 70%, var(--bg)); }
.demo__in { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.demo .lead { margin-top: 20px; }
.demo__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.demo__phones { position: relative; display: flex; justify-content: center; height: 560px; }
.demo__phones .phone { position: absolute; width: 250px; }
.phone--a { left: 8%; top: 0; transform: rotate(-4deg); }
.phone--b { right: 8%; top: 40px; transform: rotate(4deg); }
@media (max-width: 900px) {
  .demo__in { grid-template-columns: 1fr; gap: 32px; }
  .demo__phones { height: auto; gap: 14px; }
  .demo__phones .phone { position: relative; inset: auto; width: min(220px, 40vw); border-radius: 36px; padding: 7px; }
  .demo__phones .phone img { border-radius: 30px; }
  .demo__phones .phone::before { top: 13px; width: 60px; height: 18px; margin-left: -30px; }
  .phone--b { margin-top: 32px; }
}
@media (max-width: 420px) { .demo__cta .btn { width: 100%; } }

/* pricing */
.price {
  position: relative; max-width: 620px; margin: 0 auto; padding: 48px 40px 36px; border-radius: 32px; text-align: center;
  background: radial-gradient(120% 80% at 50% 0%, rgba(244, 166, 184, .14), transparent 60%), var(--card);
  box-shadow: inset 0 0 0 1px var(--line-2);
}
.price h2 { margin: 0 auto; font-size: clamp(32px, 5vw, 46px); }
.price .lead { margin: 14px auto 0; }
.badge {
  display: inline-block; margin-bottom: 22px; padding: 8px 14px; border-radius: 999px;
  background: rgba(244, 166, 184, .14); color: var(--accent); font-size: 14px; font-weight: 600;
  box-shadow: inset 0 0 0 1px rgba(244, 166, 184, .3);
}
.ticks { list-style: none; margin: 28px auto; padding: 0; display: grid; gap: 12px; text-align: left; max-width: 400px; }
.ticks li { position: relative; padding-left: 30px; color: var(--text-2); }
.ticks li::before {
  content: ''; position: absolute; left: 0; top: .2em; width: 20px; height: 20px; border-radius: 50%;
  background: rgba(244, 166, 184, .16) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='m6 10.3 2.6 2.6L14 7.5' fill='none' stroke='%23F4A6B8' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 100% no-repeat;
}
@media (max-width: 560px) {
  .price { padding: 36px 20px 28px; border-radius: 26px; }
  .badge { font-size: 13px; border-radius: 14px; }
}

/* FAQ */
.faq { margin-top: 32px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  position: relative; list-style: none; cursor: pointer; padding: 22px 44px 22px 0;
  font-size: 18px; font-weight: 600; letter-spacing: -.01em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ''; position: absolute; right: 4px; top: 50%; width: 12px; height: 12px; margin-top: -9px;
  border-right: 1.8px solid var(--text-2); border-bottom: 1.8px solid var(--text-2);
  transform: rotate(45deg); transition: transform .25s var(--ease), margin .25s;
}
.faq details[open] summary::after { transform: rotate(225deg); margin-top: -3px; }
.faq details p { padding: 0 0 22px; color: var(--text-2); max-width: 40em; }
.faq b { color: var(--text); font-weight: 600; }

/* the form */
.start .card { padding: 40px; border-radius: 32px; background: var(--card); box-shadow: inset 0 0 0 1px var(--line-2); }
.start h2 { font-size: clamp(30px, 4.4vw, 42px); }
.start .lead { margin-top: 12px; font-size: 17px; }
#lead { display: grid; gap: 14px; margin-top: 28px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field { display: grid; gap: 7px; }
.field span { font-size: 14px; font-weight: 500; color: var(--text-2); }
.field input, .field select {
  width: 100%; height: 52px; padding: 0 16px; border-radius: 14px; border: 0;
  background: var(--card-2); color: var(--text); font: 400 17px var(--font);
  box-shadow: inset 0 0 0 1px var(--line); transition: box-shadow .2s; -webkit-appearance: none; appearance: none;
}
.field select {
  padding-right: 40px;
  background: var(--card-2) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='m6 8 4 4 4-4' fill='none' stroke='%23A1A1A6' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") right 14px center / 20px no-repeat;
}
.field input::placeholder { color: var(--text-3); }
.field input:focus, .field select:focus { outline: 0; box-shadow: inset 0 0 0 2px var(--accent); }
.field.is-bad input { box-shadow: inset 0 0 0 2px var(--err); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-err { padding: 12px 14px; border-radius: 12px; background: rgba(255, 138, 128, .1); color: var(--err); font-size: 15px; }
#lead .btn { margin-top: 6px; }
#lead .fine { margin-top: 0; text-align: center; }
.done { padding: 24px 0 4px; text-align: center; outline: 0; }
.done__icon { display: grid; place-items: center; width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 50%; background: rgba(244, 166, 184, .14); }
.done__icon svg { width: 30px; height: 30px; fill: none; stroke: var(--accent); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.done h3 { font-size: 26px; }
.done p { margin-top: 10px; color: var(--text-2); }
@media (max-width: 560px) {
  .start .card { padding: 28px 20px; border-radius: 26px; }
  .row2 { grid-template-columns: 1fr; }
}

/* footer */
.foot { padding: 48px 0 calc(48px + env(safe-area-inset-bottom)); border-top: 1px solid var(--line); }
.foot__in { display: grid; gap: 10px; justify-items: start; color: var(--text-2); font-size: 15px; }
.foot__in .logo { margin-bottom: 4px; color: var(--text); }
.foot a { text-decoration: none; }
.foot a:hover { color: var(--text); }
.foot .fine { margin-top: 6px; }

/* ---------- Reveal on scroll ---------- */
/* a light fade + 12px rise, started as soon as a block is 10% into the screen */
.js .reveal { opacity: 0; transform: translateY(12px); transition: opacity .45s var(--ease), transform .45s var(--ease); }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .float { animation: none; }
}

/* ---------- How it works ---------- */
.steps { list-style: none; margin: 32px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; counter-reset: step; }
.step { position: relative; padding: 26px; border-radius: var(--r); background: var(--card); box-shadow: inset 0 0 0 1px var(--line); }
.step__n { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: 17px; }
.step h3 { margin-top: 16px; font-size: 19px; letter-spacing: -.015em; }
.step p { margin-top: 6px; font-size: 15.5px; color: var(--text-2); }
@media (max-width: 760px) {
  .steps { grid-template-columns: 1fr; gap: 10px; }
  .step { display: grid; grid-template-columns: 40px 1fr; column-gap: 16px; padding: 18px 20px; }
  .step__n { grid-row: span 2; }
  .step h3 { margin-top: 0; font-size: 17px; align-self: center; }
  .step p { margin-top: 2px; font-size: 15px; }
}

/* ---------- Legal pages ---------- */
.legal { padding-top: 40px; padding-bottom: 72px; }
.legal h1 { font-size: clamp(34px, 5vw, 48px); }
.legal__date { margin-top: 10px; font-size: 14px; color: var(--text-3); }
.legal .lead { margin-top: 24px; font-size: 18px; }
.legal h2 { margin: 36px 0 12px; font-size: 22px; letter-spacing: -.015em; }
.legal h3 { margin: 20px 0 8px; font-size: 17px; letter-spacing: -.01em; }
.legal p, .legal li { color: var(--text-2); font-size: 16.5px; }
.legal p + p { margin-top: 12px; }
.legal ul { margin: 0; padding-left: 20px; display: grid; gap: 8px; }
.legal b { color: var(--text); font-weight: 600; }
.legal a { color: var(--accent); }
.nav__links a[aria-current] { color: var(--text); }
@media (max-width: 760px) { .legal-page .nav__links { display: flex; gap: 18px; } }
.form-legal { margin-top: 0; text-align: center; font-size: 13px; color: var(--text-3); }
.form-legal a, .foot a.u { color: inherit; text-decoration: underline; text-underline-offset: 2px; }