/* PracticeAI — editorial "beauty magazine meets creative agency". Warm paper, deep ink, rouge accent. */

:root {
  --paper: oklch(97.4% 0.013 75);
  --paper-2: oklch(94.2% 0.024 68);
  --blush: oklch(91% 0.045 30);
  --ink: oklch(23% 0.026 40);
  --ink-2: oklch(40% 0.035 42);
  --rouge: oklch(58% 0.165 32);
  --rouge-deep: oklch(46% 0.15 30);
  --mustard: oklch(87% 0.13 90);
  --leaf: oklch(50% 0.1 158);
  --line: oklch(85% 0.025 62);
  --white: oklch(99.3% 0.004 75);

  --serif: "Fraunces", "Iowan Old Style", "Palatino", Georgia, serif;
  --sans: "Instrument Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;

  --step--1: clamp(0.82rem, 0.8rem + 0.1vw, 0.88rem);
  --step-0: clamp(1rem, 0.97rem + 0.15vw, 1.08rem);
  --step-1: clamp(1.2rem, 1.1rem + 0.45vw, 1.45rem);
  --step-2: clamp(1.6rem, 1.35rem + 1.1vw, 2.3rem);
  --step-3: clamp(2.2rem, 1.6rem + 2.6vw, 3.9rem);
  --step-4: clamp(2.7rem, 1.7rem + 4.2vw, 5.4rem);

  --gutter: clamp(1rem, 0.4rem + 3vw, 3rem);
  --max: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 var(--step-0)/1.6 var(--sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
/* paper grain */
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 0; opacity: .35;
  background-image: radial-gradient(oklch(80% 0.03 60 / .35) 0.6px, transparent 0.6px);
  background-size: 3px 3px;
}
main, header, footer { position: relative; z-index: 1; }
img { max-width: 100%; display: block; }
a { color: inherit; }
::selection { background: var(--mustard); color: var(--ink); }
:focus-visible { outline: 2px solid var(--rouge); outline-offset: 3px; border-radius: 4px; }

.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: .6rem 1rem; z-index: 10; }
.skip:focus { left: 1rem; top: 1rem; }

h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.05; letter-spacing: -0.02em; margin: 0; font-variation-settings: "SOFT" 60; }
h1 { font-size: var(--step-4); font-optical-sizing: auto; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-1); line-height: 1.2; font-weight: 500; letter-spacing: -0.01em; }
em { font-style: italic; font-variation-settings: "SOFT" 100; }
p { margin: 0; }

/* ---------- Header ---------- */
.top {
  display: flex; align-items: center; gap: 2rem;
  max-width: var(--max); margin: 0 auto; padding: 1.4rem var(--gutter);
}
.wordmark {
  font-family: var(--serif); font-size: 1.55rem; text-decoration: none; letter-spacing: -0.03em; font-weight: 500;
}
.wordmark em { color: var(--rouge); font-weight: 400; margin-left: .04em; }
.top nav { display: flex; gap: 1.6rem; margin-left: auto; }
.top nav a { text-decoration: none; font-size: var(--step--1); font-weight: 500; color: var(--ink-2); }
.top nav a:hover { color: var(--ink); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font: 600 var(--step--1)/1 var(--sans); letter-spacing: .01em; text-decoration: none;
  padding: .95rem 1.4rem; border-radius: 999px; transition: transform .25s var(--ease), background .25s var(--ease), color .25s;
  white-space: nowrap;
}
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--rouge); color: var(--white); }
.btn-primary:hover { background: var(--rouge-deep); transform: translateY(-1px); }
.btn-ghost { border: 1.5px solid var(--ink); padding: .7rem 1.1rem; }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.btn-light { background: var(--paper); color: var(--rouge-deep); }
.btn-light:hover { background: var(--white); transform: translateY(-1px); }
.link-arrow { font-weight: 600; font-size: var(--step--1); text-decoration: none; border-bottom: 1.5px solid var(--line); padding-bottom: 2px; }
.link-arrow:hover { border-color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  max-width: var(--max); margin: 0 auto; padding: clamp(2rem, 6vw, 5.5rem) var(--gutter) clamp(3rem, 8vw, 7rem);
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: clamp(2rem, 5vw, 5rem); align-items: center;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: .6rem; font-size: var(--step--1); font-weight: 600;
  background: var(--blush); color: var(--rouge-deep); padding: .45rem .9rem; border-radius: 999px; margin-bottom: 1.6rem;
}
.pulse { width: .5rem; height: .5rem; border-radius: 50%; background: var(--rouge); box-shadow: 0 0 0 0 oklch(58% 0.165 32 / .5); animation: pulse 2.2s var(--ease) infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 .55rem oklch(58% 0.165 32 / 0); } 100% { box-shadow: 0 0 0 0 oklch(58% 0.165 32 / 0); } }

.mark { position: relative; white-space: nowrap; font-style: italic; font-variation-settings: "SOFT" 100; }
.mark::after {
  content: ""; position: absolute; left: -2%; right: -2%; bottom: .06em; height: .32em; z-index: -1;
  background: var(--mustard); border-radius: 40% 60% 55% 45% / 60% 40% 60% 40%; transform: rotate(-1.2deg) scaleX(0); transform-origin: left;
  animation: draw 1s .7s var(--ease) forwards;
}
@keyframes draw { to { transform: rotate(-1.2deg) scaleX(1); } }
.hero h1 { position: relative; z-index: 0; }
.lead { font-size: var(--step-1); line-height: 1.5; color: var(--ink-2); margin-top: 1.6rem; max-width: 34ch; }
.lead strong { color: var(--ink); font-weight: 600; }
.cta-row { display: flex; align-items: center; gap: 1.4rem; flex-wrap: wrap; margin-top: 2.2rem; }
.fineprint { margin-top: 1.6rem; font-size: var(--step--1); color: var(--ink-2); max-width: 40ch; }

/* chat */
.chat {
  margin: 0; background: var(--white); border-radius: 28px; padding: 1.1rem 1.1rem .8rem;
  box-shadow: 0 1px 0 var(--line), 0 30px 60px -30px oklch(40% 0.06 40 / .35), 0 12px 24px -16px oklch(40% 0.06 40 / .25);
  transform: rotate(1.2deg); position: relative;
}
.chat::before { /* tape */
  content: ""; position: absolute; top: -14px; left: 50%; width: 110px; height: 28px; transform: translateX(-50%) rotate(-3deg);
  background: oklch(90% 0.07 88 / .75); border-radius: 3px;
}
.chat-head { display: flex; align-items: center; gap: .75rem; padding: .3rem .3rem .9rem; border-bottom: 1px solid var(--paper-2); }
.chat-head strong { display: block; font-size: 1rem; }
.status { display: block; font-size: .78rem; color: var(--leaf); }
.avatar {
  width: 2.4rem; height: 2.4rem; border-radius: 50%; display: grid; place-items: center;
  font: italic 500 1.25rem var(--serif); color: var(--white); background: var(--rouge);
}
.chat-body { list-style: none; margin: 0; padding: .9rem .2rem .4rem; display: flex; flex-direction: column; gap: .65rem; min-height: 26rem; }
.msg {
  max-width: 88%; padding: .75rem .95rem; border-radius: 18px; font-size: .92rem; line-height: 1.45;
  opacity: 0; transform: translateY(8px); transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.msg.show { opacity: 1; transform: none; }
.msg.in { background: var(--paper-2); border-bottom-left-radius: 6px; align-self: flex-start; }
.msg.out { background: var(--ink); color: var(--paper); border-bottom-right-radius: 6px; align-self: flex-end; }
.msg b { font-weight: 600; color: var(--rouge-deep); }
.typing { align-self: flex-start; background: var(--paper-2); border-radius: 18px; padding: .8rem 1rem; display: inline-flex; gap: 4px; }
.typing i { width: 6px; height: 6px; border-radius: 50%; background: var(--ink-2); opacity: .4; animation: blink 1s infinite; }
.typing i:nth-child(2) { animation-delay: .15s; } .typing i:nth-child(3) { animation-delay: .3s; }
@keyframes blink { 50% { opacity: 1; } }
.shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-top: .7rem; }
.shots i {
  aspect-ratio: 3/4; border-radius: 10px; display: flex; align-items: flex-end; padding: 6px; font-style: normal;
  font-size: .62rem; font-weight: 600; color: var(--white); letter-spacing: .02em; position: relative; overflow: hidden;
}
.shots i::before { /* abstract portrait */
  content: ""; position: absolute; left: 50%; top: 22%; width: 42%; aspect-ratio: 1; border-radius: 50%; transform: translateX(-50%);
  background: oklch(99% 0 0 / .55);
  box-shadow: 0 2.6rem 0 1.1rem oklch(99% 0 0 / .4);
}
.shots .s1 { background: linear-gradient(160deg, oklch(70% 0.08 60), oklch(55% 0.09 45)); }
.shots .s2 { background: linear-gradient(160deg, oklch(80% 0.03 230), oklch(62% 0.05 235)); }
.shots .s3 { background: linear-gradient(160deg, oklch(78% 0.1 75), oklch(60% 0.13 40)); }
.shots i span, .shots i { z-index: 0; }
.score { font-weight: 700; padding: 0 .35em; border-radius: 6px; }
.score.low { background: oklch(90% 0.06 30); color: var(--rouge-deep); }
.score.high { background: oklch(91% 0.06 158); color: var(--leaf); }
.chips { display: flex; gap: .4rem; margin-top: .65rem; flex-wrap: wrap; }
.chips span { border: 1.5px solid var(--ink); border-radius: 999px; padding: .25rem .7rem; font-size: .78rem; font-weight: 600; background: var(--white); }
.chips span:first-child { background: var(--ink); color: var(--paper); }
.chat figcaption { text-align: center; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); padding-top: .4rem; }

/* ---------- Sections ---------- */
.section { max-width: var(--max); margin: 0 auto; padding: clamp(3.5rem, 9vw, 7.5rem) var(--gutter); }
.section-lead { color: var(--ink-2); font-size: var(--step-1); margin-top: .8rem; }

.how { border-top: 1px solid var(--line); }
.steps { list-style: none; padding: 0; margin: clamp(2rem, 5vw, 3.5rem) 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 4vw, 3.5rem); }
.steps li { position: relative; }
.num { display: block; font: italic 300 var(--step-3)/1 var(--serif); color: var(--rouge); margin-bottom: 1rem; font-variation-settings: "SOFT" 100; }
.steps h3 { margin-bottom: .6rem; }
.steps p { color: var(--ink-2); }
.steps li:nth-child(2) { margin-top: 2.5rem; }
.steps li:nth-child(3) { margin-top: 5rem; }

/* team: editorial credits */
.team { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.team-intro { position: sticky; top: 2rem; }
.team-intro h2 em { color: var(--rouge); }
.team-intro p { margin-top: 1.4rem; color: var(--ink-2); font-size: var(--step-1); max-width: 30ch; line-height: 1.5; }
.credits { list-style: none; margin: 0; padding: 0; counter-reset: c; }
.credits li { counter-increment: c; display: grid; grid-template-columns: 3rem 1fr; gap: .3rem 1rem; padding: 1.6rem 0; border-top: 1px solid var(--line); }
.credits li:last-child { border-bottom: 1px solid var(--line); }
.credits li::before { content: counter(c, decimal-leading-zero); grid-row: span 2; font: 600 var(--step--1) var(--sans); color: var(--rouge); padding-top: .55rem; }
.role { font: 400 var(--step-2)/1.1 var(--serif); letter-spacing: -0.02em; }
.credits p { color: var(--ink-2); max-width: 46ch; }

/* week track */
.week { background: var(--ink); color: var(--paper); max-width: none; }
.week > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.week .section-lead { color: oklch(80% 0.03 60); }
.track { list-style: none; padding: 0; margin-top: clamp(2rem, 5vw, 3.5rem); display: grid; grid-template-columns: repeat(5, 1fr); position: relative; }
.track::before { content: ""; position: absolute; left: 0; right: 0; top: .95rem; border-top: 1.5px dashed oklch(55% 0.03 50); }
.track li { position: relative; padding: 2.6rem 1.2rem 0 0; }
.track li::before { content: ""; position: absolute; top: .55rem; left: 0; width: .85rem; height: .85rem; border-radius: 50%; background: var(--rouge); box-shadow: 0 0 0 5px var(--ink); }
.day { display: block; font: italic 400 var(--step-1) var(--serif); color: var(--mustard); margin-bottom: .5rem; }
.track p { color: oklch(88% 0.02 70); font-size: .95rem; line-height: 1.5; }

/* safety */
.safety { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 6vw, 6rem); align-items: center; }
.safety-copy > p { color: var(--ink-2); font-size: var(--step-1); margin-top: 1.2rem; line-height: 1.5; max-width: 38ch; }
.checks { list-style: none; padding: 0; margin: 2rem 0 0; display: grid; gap: 1rem; }
.checks li { padding-left: 2rem; position: relative; }
.checks li::before { content: "✓"; position: absolute; left: 0; top: -.05rem; width: 1.35rem; height: 1.35rem; border-radius: 50%; background: var(--leaf); color: var(--white); font-size: .75rem; font-weight: 700; display: grid; place-items: center; }
.caption-card {
  margin: 0; background: var(--white); border-radius: 22px; padding: 1.6rem; transform: rotate(-1.4deg);
  box-shadow: 0 1px 0 var(--line), 0 30px 60px -32px oklch(40% 0.06 40 / .35);
}
.cc-head { display: flex; justify-content: space-between; align-items: center; font-size: var(--step--1); font-weight: 600; color: var(--ink-2); margin-bottom: 1rem; }
.cc-score { position: relative; display: inline-grid; }
.cc-score span { grid-area: 1/1; font: 700 1.4rem var(--sans); padding: .1rem .55rem; border-radius: 8px; transition: opacity .6s var(--ease), transform .6s var(--ease); }
.cc-score .was { background: oklch(90% 0.06 30); color: var(--rouge-deep); }
.cc-score .now { background: oklch(91% 0.06 158); color: var(--leaf); opacity: 0; transform: translateY(6px); }
.cc-text { font: 400 var(--step-1)/1.45 var(--serif); }
.swap { position: relative; }
.swap del { text-decoration-color: var(--rouge); text-decoration-thickness: 2px; color: var(--rouge-deep); transition: opacity .5s var(--ease); }
.swap ins { text-decoration: none; background: linear-gradient(transparent 60%, oklch(91% 0.08 158) 60%); display: none; }
.caption-card.fixed .was { opacity: 0; transform: translateY(-6px); }
.caption-card.fixed .now { opacity: 1; transform: none; }
.caption-card.fixed del { display: none; }
.caption-card.fixed ins { display: inline; animation: fadein .6s var(--ease); }
@keyframes fadein { from { opacity: 0; } }
.caption-card figcaption { margin-top: 1.2rem; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); }

/* built for */
.builtfor { padding-top: 0; }
.builtfor > p { font-size: var(--step--1); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); font-weight: 600; }
.specialties { list-style: none; padding: 0; margin: 1rem 0 0; display: flex; flex-wrap: wrap; gap: .2rem 0; font: italic 300 var(--step-2)/1.3 var(--serif); }
.specialties li:not(:last-child)::after { content: "·"; color: var(--rouge); margin: 0 .55em; font-style: normal; }

/* faq */
.faq { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(2rem, 6vw, 6rem); align-items: start; border-top: 1px solid var(--line); }
.qa details { border-bottom: 1px solid var(--line); }
.qa details:first-child { border-top: 1px solid var(--line); }
.qa summary { list-style: none; cursor: pointer; padding: 1.3rem 2.5rem 1.3rem 0; font-weight: 600; font-size: var(--step-1); position: relative; line-height: 1.35; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; position: absolute; right: .2rem; top: 1.05rem; font: 300 1.8rem/1 var(--serif); color: var(--rouge); transition: transform .3s var(--ease); }
.qa details[open] summary::after { transform: rotate(45deg); }
.qa details p { padding: 0 2.5rem 1.4rem 0; color: var(--ink-2); max-width: 60ch; }

/* cta */
.cta {
  background: var(--rouge); color: var(--white); border-radius: clamp(20px, 3vw, 36px);
  margin: 0 var(--gutter) clamp(2rem, 5vw, 4rem); max-width: calc(var(--max) - 2 * var(--gutter));
  padding: clamp(3rem, 8vw, 6rem) clamp(1.5rem, 6vw, 5rem); text-align: left; position: relative; overflow: hidden;
}
@media (min-width: 1200px) { .cta { margin-left: auto; margin-right: auto; } }
.cta::after { content: "M"; position: absolute; right: -2rem; bottom: -6rem; font: italic 300 22rem/1 var(--serif); color: oklch(66% 0.15 33); pointer-events: none; }
.cta h2 { max-width: 16ch; position: relative; z-index: 1; }
.cta h2 em { color: var(--mustard); }
.cta > p { margin-top: 1.2rem; max-width: 46ch; font-size: var(--step-1); line-height: 1.5; color: oklch(95% 0.03 40); position: relative; z-index: 1; }
.cta .cta-row { position: relative; z-index: 1; }
.or { font-size: var(--step--1); color: oklch(94% 0.03 40); }
.or a { color: var(--white); font-weight: 600; }

/* footer */
.foot { max-width: var(--max); margin: 0 auto; padding: 2rem var(--gutter) 3rem; display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; font-size: var(--step--1); color: var(--ink-2); }
.foot nav { margin-left: auto; display: flex; gap: 1.2rem; }
.foot nav a { text-decoration: none; font-weight: 500; }
.foot nav a:hover { color: var(--ink); }

/* reveal on scroll */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.js .reveal.in-view { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .top nav { display: none; }
  .top .btn-ghost { margin-left: auto; }
  .hero { grid-template-columns: 1fr; }
  .chat { max-width: 30rem; transform: rotate(.8deg); }
  .steps { grid-template-columns: 1fr; }
  .steps li:nth-child(n) { margin-top: 0; }
  .team, .safety, .faq { grid-template-columns: 1fr; }
  .team-intro { position: static; }
  .track { grid-template-columns: 1fr; }
  .track::before { left: .42rem; right: auto; top: .5rem; bottom: .5rem; border-top: 0; border-left: 1.5px dashed oklch(55% 0.03 50); }
  .track li { padding: 0 0 1.8rem 2.2rem; }
  .track li::before { top: .4rem; }
}
@media (max-width: 480px) {
  .chat-body { min-height: 0; }
  .cta::after { font-size: 14rem; bottom: -3rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .mark::after { transform: rotate(-1.2deg) scaleX(1); }
  .msg { opacity: 1; transform: none; }
  .js .reveal { opacity: 1; transform: none; }
}

/* simple pages (privacy, 404) */
.prose { max-width: 760px; }
.prose h1 { font-size: var(--step-3); }
.prose h2 { font-size: var(--step-2); margin: 2.6rem 0 .8rem; }
.prose p + p { margin-top: .9rem; }
.prose p { color: var(--ink-2); }
.prose a { color: var(--rouge-deep); font-weight: 600; }