/* Unlooped — unlooped.app
   Palette mirrors the iOS app (Theme.swift). Typography: Newsreader for
   display + long copy (book DNA — calm reading), system SF for UI elements
   (mirrors the app's own chrome), system mono for structural labels. */

:root {
  --paper: #faf6f0;
  --paper-inset: #f2ede5;
  --ink: #2a2520;
  --ink-2: #59503f;
  --ink-3: #8d8478;
  --hairline: #ddd5c9;
  --accent: #d85731;
  --resolve: #4c8759;
  --reply: #3f6e9e;
  --decide: #7a58a4;
  --waiting: #a87b22;
  --explore: #2e7d7d;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1b1917;
    --paper-inset: #232019;
    --ink: #f2ede6;
    --ink-2: #cfc6b8;
    --ink-3: #8d8478;
    --hairline: #38342e;
    --accent: #f08a63;
    --resolve: #86bb90;
    --reply: #85aed6;
    --decide: #b399d6;
    --waiting: #d9b164;
    --explore: #6cb8b8;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-size: 19px;
  line-height: 1.55;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.wrap-narrow { width: min(680px, calc(100% - 40px)); margin: 0 auto; }

a { color: var(--ink); text-decoration-color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2.5px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

h1, h2, h3 { margin: 0; font-weight: 500; line-height: 1.06; letter-spacing: -0.012em; text-wrap: balance; }
h1 em, h2 em { font-style: italic; font-weight: 460; color: var(--accent); }
p { margin: 0 0 1em; color: var(--ink-2); }

.label {
  font: 500 12px/1 var(--mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.ring { flex: none; }
.ring circle {
  fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round;
  transform-origin: center; transform: rotate(-114deg);
}

/* ---------- UI elements: system sans, like the app's chrome ---------- */

.btn-store {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--ink); color: var(--paper);
  padding: 13px 26px 13px 21px; border-radius: 999px;
  font: 600 15.5px/1.2 var(--sans); text-decoration: none;
  transition: opacity 0.15s ease;
}
.btn-store:hover { opacity: 0.86; color: var(--paper); }
.btn-store svg { flex: none; }
.btn-store small { display: block; font: 500 10.5px/1.15 var(--sans); opacity: 0.7; }
.btn-store span { display: block; }

.textlink {
  font: 500 15px/1.2 var(--sans);
  color: var(--ink-2); text-decoration: underline;
  text-decoration-color: var(--hairline); text-underline-offset: 4px;
}
.textlink:hover { color: var(--accent); text-decoration-color: var(--accent); }

/* ---------- header ---------- */

.nav { display: flex; align-items: baseline; justify-content: space-between; padding: 26px 0 0; }
.wordmark {
  display: inline-flex; align-items: center; gap: 9px;
  font: 500 22px/1 var(--serif); letter-spacing: -0.01em;
  color: var(--ink); text-decoration: none;
}
.wordmark .ring { color: var(--accent); position: relative; top: 1px; }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a.plain { font: 500 14.5px/1 var(--sans); color: var(--ink-2); text-decoration: none; }
.nav-links a.plain:hover { color: var(--accent); }
.nav .btn-store { padding: 8px 16px 8px 13px; font-size: 13.5px; }
.nav .btn-store small { display: none; }

/* ---------- hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 58fr) minmax(0, 42fr);
  gap: clamp(40px, 6vw, 96px);
  padding: clamp(56px, 10vh, 120px) 0 clamp(56px, 9vh, 104px);
}
.hero h1 {
  font-size: clamp(44px, 6.4vw, 88px);
  line-height: 1.02;
}
.hero .sub {
  font-size: clamp(19px, 1.6vw, 22px);
  line-height: 1.5;
  max-width: 26em;
  margin: 26px 0 36px;
}
.hero-ctas { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.hero-trust {
  margin: 22px 0 0; font: 400 14px/1.6 var(--sans); color: var(--ink-3);
}
.hero-trust .dot { padding: 0 7px; color: var(--hairline); }

/* ---------- hero transcript ---------- */

.transcript {
  border-left: 1px solid var(--hairline);
  padding-left: clamp(20px, 2.6vw, 36px);
  align-self: center;
  font-size: 16.5px;
}
.transcript .line { margin: 0 0 18px; color: var(--ink); line-height: 1.5; }
.transcript .line.app { color: var(--ink-3); font-style: italic; }
.transcript .who {
  display: block;
  font: 500 11px/1 var(--mono);
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 6px; font-style: normal;
}
.tloop {
  display: flex; align-items: baseline; gap: 12px;
  border-top: 1px solid var(--hairline);
  padding: 13px 0;
  font-family: var(--sans); font-size: 15px; font-weight: 500;
}
.tloop:last-child { border-bottom: 1px solid var(--hairline); }
.tloop .ring { align-self: center; }
.tloop .tt { flex: 1; }
.tloop .tag {
  font: 500 10.5px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase;
}

@media (prefers-reduced-motion: no-preference) {
  .anim { opacity: 0; animation: appear 0.5s ease-out forwards; }
  .transcript .line.you { animation-delay: 0.25s; }
  .transcript .line.app { animation-delay: 1.0s; }
  .transcript .lc1 { animation-delay: 1.3s; }
  .transcript .lc2 { animation-delay: 1.5s; }
  .transcript .lc3 { animation-delay: 1.7s; }
  @keyframes appear { to { opacity: 1; } }
  .lc1 .ring circle { stroke-dasharray: 50.3; stroke-dashoffset: 8.5; animation: seal 0.55s ease-out 2.7s forwards; }
  @keyframes seal { to { stroke-dashoffset: 0; stroke: var(--resolve); } }
  .lc1 .tt { animation: appear 0.5s ease-out 1.3s forwards, strike 0.35s ease-out 3.05s forwards; }
  @keyframes strike { to { text-decoration: line-through; text-decoration-color: var(--ink-3); color: var(--ink-3); } }
}
@media (prefers-reduced-motion: reduce) {
  .lc1 .ring circle { stroke-dasharray: 50.3; stroke-dashoffset: 0; stroke: var(--resolve); }
  .lc1 .tt { text-decoration: line-through; text-decoration-color: var(--ink-3); color: var(--ink-3); }
}

/* ---------- the loop sentence ---------- */

.loopdef {
  border-top: 1px solid var(--hairline);
  padding: clamp(44px, 7vh, 72px) 0;
}
.loopdef p {
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.42;
  color: var(--ink);
  max-width: 30em;
  margin: 0;
}
.loopdef .aside { display: block; margin-top: 10px; font-style: italic; font-size: 0.72em; color: var(--ink-3); }
.loopword { white-space: nowrap; font-style: italic; }
.loopword .ring { display: inline-block; vertical-align: -2px; margin-right: 4px; }

/* ---------- chapters ---------- */

.chapters { border-top: 1px solid var(--hairline); }
.chapter {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(36px, 5vw, 80px);
  padding: clamp(52px, 8vh, 88px) 0;
}
.chapter + .chapter { border-top: 1px solid var(--hairline); }
.chapter-head { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
.chapter-head .ring { color: var(--accent); }
.chapter h2 { font-size: clamp(32px, 3.6vw, 52px); margin-bottom: 20px; }
.chapter .prose { font-size: 19px; max-width: 30em; }
.chapter ul { margin: 26px 0 0; padding: 0; max-width: 30em; }
.chapter ul li {
  list-style: none;
  font: 400 15.5px/1.55 var(--sans);
  color: var(--ink-2);
  padding: 11px 0;
}
.chapter ul li + li { border-top: 1px solid var(--hairline); }

/* screenshots: right column, bleeding off the viewport edge */
.chapter .shot {
  margin-right: max(-24px, calc((100vw - 1120px) / -2 - 0px));
  margin-right: calc((min(1120px, 100vw - 48px) - 100vw) / 2);
  align-self: center;
}
.chapter .shot img {
  display: block; width: 100%; max-width: 520px; height: auto;
  border-radius: 28px 0 0 28px;
  box-shadow: 0 1px 0 var(--hairline), 0 22px 48px -20px rgba(42, 37, 32, 0.25);
}
.chapter.cropped .shot img {
  aspect-ratio: 5 / 6.5;
  object-fit: cover; object-position: top;
}

/* ---------- promises: three columns with rules ---------- */

.promises {
  border-top: 1px solid var(--hairline);
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  padding: clamp(44px, 7vh, 68px) 0;
}
.promises > div { padding: 0 clamp(20px, 3vw, 44px); }
.promises > div:first-child { padding-left: 0; }
.promises > div:last-child { padding-right: 0; }
.promises > div + div { border-left: 1px solid var(--hairline); }
.promises h3 { font-size: 21px; font-style: italic; font-weight: 460; margin-bottom: 8px; }
.promises p { font: 400 15px/1.6 var(--sans); color: var(--ink-2); margin: 0; }

/* ---------- privacy colophon ---------- */

.colophon {
  border-top: 1px solid var(--hairline);
  padding: clamp(52px, 8vh, 88px) 0;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(32px, 5vw, 88px);
}
.colophon h2 { font-size: clamp(30px, 3.2vw, 44px); margin: 14px 0 18px; }
.colophon .lead { font-size: 18px; max-width: 24em; }
.colophon dl { margin: 6px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 26px 36px; }
.colophon dt { font: 600 15px/1.4 var(--sans); color: var(--ink); margin-bottom: 4px; }
.colophon dd { margin: 0; font: 400 14.5px/1.6 var(--sans); color: var(--ink-2); }

/* ---------- finale ---------- */

.finale {
  border-top: 1px solid var(--hairline);
  text-align: center;
  padding: clamp(84px, 14vh, 150px) 0 clamp(72px, 11vh, 120px);
}
.finale .ring { color: var(--ink-3); margin-bottom: 30px; }
.finale .ring circle { stroke-dasharray: 50.3; stroke-dashoffset: 8.5; transition: stroke-dashoffset 0.7s ease-out 0.25s, stroke 0.7s ease-out 0.25s; }
.finale .ring path { opacity: 0; transition: opacity 0.4s ease-out 0.85s; }
.finale.sealed .ring { color: var(--resolve); }
.finale.sealed .ring circle { stroke-dashoffset: 0; }
.finale.sealed .ring path { opacity: 1; }
@media (prefers-reduced-motion: reduce) {
  .finale .ring { color: var(--resolve); }
  .finale .ring circle { stroke-dashoffset: 0; transition: none; }
  .finale .ring path { opacity: 1; transition: none; }
}
.finale h2 { font-size: clamp(46px, 6vw, 82px); }
.finale p { font-size: 20px; font-style: italic; margin: 20px auto 36px; max-width: 26em; }
.finale .fineprint { font: 400 13px/1.6 var(--sans); font-style: normal; color: var(--ink-3); margin: 20px 0 0; }

/* ---------- footer ---------- */

.footer { border-top: 1px solid var(--hairline); }
.footer .wrap {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 20px; flex-wrap: wrap; padding: 26px 0 44px;
  font: 400 13.5px/1.6 var(--sans); color: var(--ink-3);
}
.footer nav { display: flex; gap: 22px; }
.footer a { font: inherit; color: var(--ink-2); text-decoration: none; }
.footer a:hover { color: var(--accent); }

/* ---------- article pages (support / privacy) ---------- */

.article { padding: clamp(48px, 8vh, 84px) 0 92px; }
.article h1 { font-size: clamp(38px, 6vw, 58px); margin-bottom: 16px; }
.article .summary { font-size: 22px; font-style: italic; line-height: 1.45; max-width: 26em; color: var(--ink-2); }
.article h2 { font-size: 25px; margin: 46px 0 10px; }
.article p, .article li { font-size: 17px; }
.article .card {
  margin-top: 36px; padding: 24px 0;
  border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline);
}
.article .card h2 { margin-top: 0; }
.article details { border-bottom: 1px solid var(--hairline); padding: 18px 0; }
.article details summary {
  cursor: pointer; font: 500 20px/1.35 var(--serif); color: var(--ink);
  list-style: none; display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
}
.article details summary::-webkit-details-marker { display: none; }
.article details summary::after { content: "+"; font: 400 20px/1 var(--mono); color: var(--accent); flex: none; }
.article details[open] summary::after { content: "−"; }
.article details p { margin: 12px 0 4px; }
.article footer { margin-top: 56px; font: 400 13.5px/1.6 var(--sans); color: var(--ink-3); }

/* ---------- responsive ---------- */

@media (max-width: 920px) {
  .hero { grid-template-columns: 1fr; padding-top: 40px; }
  .transcript { max-width: 480px; }
  .chapter { grid-template-columns: 1fr; }
  .chapter .shot { margin: 0 auto; width: min(100%, 396px); }
  .chapter .shot img { border-radius: 24px; }
  .promises { grid-template-columns: 1fr; gap: 0; }
  .promises > div { padding: 22px 0; }
  .promises > div + div { border-left: 0; border-top: 1px solid var(--hairline); }
  .colophon { grid-template-columns: 1fr; }
  .colophon dl { grid-template-columns: 1fr; }
  .nav-links a.plain { display: none; }
}

@media (max-width: 600px) {
  body { font-size: 17px; }
  .wrap, .wrap-narrow { width: min(100% - 32px, 1120px); }

  .nav { align-items: center; padding-top: 18px; }
  .wordmark { font-size: 20px; }
  .nav-links { gap: 10px; }
  .nav .btn-store { padding: 8px 12px; }

  .hero {
    gap: 44px;
    padding: 42px 0 56px;
  }
  .hero h1 { font-size: clamp(40px, 12.5vw, 56px); }
  .hero .sub { margin: 22px 0 28px; }
  .hero-trust { display: flex; flex-wrap: wrap; gap: 3px 8px; }
  .hero-trust .dot { display: none; }
  .transcript {
    max-width: none;
    border-left: 0;
    border-top: 1px solid var(--hairline);
    padding: 28px 0 0;
  }
  .tloop { gap: 9px; font-size: 14px; }
  .tloop .tag { font-size: 9.5px; }

  .loopdef { padding: 40px 0; }
  .loopdef p { font-size: 25px; }
  .loopword { white-space: normal; }

  .chapter {
    gap: 32px;
    padding: 48px 0 56px;
  }
  .chapter-head { margin-bottom: 16px; }
  .chapter h2 { margin-bottom: 16px; }
  .chapter .prose { font-size: 17px; }
  .chapter ul { margin-top: 18px; }
  .chapter .shot { width: min(100%, 340px); }
  .chapter .shot img { border-radius: 22px; }

  .promises { padding: 28px 0; }
  .colophon { padding: 48px 0; }
  .colophon dl { gap: 22px; }
  .finale { padding: 76px 0 68px; }
  .finale p { font-size: 18px; }
  .footer .wrap { align-items: flex-start; flex-direction: column; }

  .article { padding: 42px 0 68px; }
  .article .summary { font-size: 20px; }
  .article h2 { margin-top: 38px; }
}