/* Hallmark · genre: playful · macrostructure: Narrative Workflow (home) + Conversational FAQ (legal) · design-system: design.md · designed-as-app
 * theme: Hum · nav: N1a wordmark+2 links (split, text, sticky) · footer: Ft2 inline single line (wordmark/links/credit, middot, spaced)
 * hero: H9 custom illustration (Tier-A CSS practice timeline, tilted -2deg) · features: F4 step sequence (1.0/2.0, zig-zag, dashed connector)
 * character: pear playhead dot inside the A/B loop · pop: coral loop region + one big "7" · enrichment: E-none beyond Tier-A CSS art
 * audience: K-pop / dance-cover learners, Gen Z · use: Add to Chrome · tone: playful
 */
@import url("tokens.css");

*, *::before, *::after { box-sizing: border-box; }
html, body { overflow-x: clip; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: 1.6;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
p { margin: 0 0 var(--space-sm); }
p:last-child { margin-bottom: 0; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.04;
  margin: 0;
  overflow-wrap: anywhere;
  min-width: 0;
  text-wrap: balance;
}

a { color: var(--color-accent-2-ink); text-decoration-thickness: 2px; text-underline-offset: 0.18em; }
a:hover { color: var(--color-ink); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 6px;
}

.mono {
  font-family: var(--font-label);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.skip {
  position: absolute; left: var(--space-sm); top: -4rem;
  background: var(--color-ink); color: var(--color-paper);
  padding: var(--space-2xs) var(--space-sm); border-radius: var(--radius-pill); z-index: 20;
}
.skip:focus { top: var(--space-sm); }

/* ── shell: one width model for every section ─────────────────────────── */
.shell { max-width: var(--page-max); margin-inline: auto; padding-inline: var(--page-gutter); }
.band { padding-block: var(--space-2xl); }
.band--pear  { background: var(--tint-pear); }
.band--cyan  { background: var(--tint-cyan); }
.band--coral { background: var(--tint-coral); }
.band--mint  { background: var(--tint-mint); }
.band--paper2 { background: var(--color-paper-2); }

/* ── nav (N1a) ────────────────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in oklch, var(--color-paper) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: var(--rule-dash);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-sm);
  min-height: 4rem;
}
.wordmark {
  display: inline-flex; align-items: center; gap: var(--space-2xs);
  font-family: var(--font-display); font-weight: 700; font-size: var(--text-md);
  letter-spacing: -0.02em; color: var(--color-ink); text-decoration: none; white-space: nowrap;
}
.wordmark__mark {
  width: 1.5rem; height: 1.5rem; border-radius: 8px; position: relative; flex: none;
  background: var(--color-ink);
}
.wordmark__mark::before { /* the loop */
  content: ""; position: absolute; left: 4px; right: 4px; top: 50%; height: 4px; margin-top: -2px;
  border-radius: 2px; background: var(--color-accent-3);
}
.wordmark__mark::after { /* the playhead */
  content: ""; position: absolute; left: 50%; top: 50%; width: 8px; height: 8px; margin: -4px 0 0 -4px;
  border-radius: 50%; background: var(--color-accent);
}
.wordmark__short { display: none; }
.nav__links { display: flex; align-items: center; gap: var(--space-md); }
.nav__link {
  color: var(--color-ink-2); font-weight: 500; font-size: var(--text-sm);
  text-decoration: none; white-space: nowrap; display: none;
}
.nav__link:hover { color: var(--color-ink); text-decoration: underline; text-decoration-color: var(--color-accent-2); }
@media (min-width: 40rem) { .nav__link { display: inline; } }
@media (max-width: 24rem) {
  .wordmark__full { display: none; }
  .wordmark__short { display: inline; }
}

/* ── buttons (Hum system, verbatim anatomy) ───────────────────────────── */
.btn {
  --btn-face: var(--color-accent); --btn-ink: var(--color-ink);
  --btn-edge: var(--color-accent-deep); --btn-cast: var(--color-accent-cast);
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5em;
  padding: 0.8rem 1.4rem; min-height: 3rem;
  font: 600 var(--text-md)/1.1 var(--font-body);
  border: 0; border-radius: var(--radius-pill);
  color: var(--btn-ink); background: var(--btn-face); text-decoration: none; white-space: nowrap;
  cursor: pointer; position: relative; isolation: isolate;
  box-shadow: 0 4px 0 0 var(--btn-edge), 0 6px 12px -3px var(--btn-cast);
  transform: translateY(0);
  transition: transform var(--dur-short) var(--ease-press), box-shadow var(--dur-short) var(--ease-press), background-color 160ms var(--ease-out);
}
.btn:hover  { color: var(--btn-ink); transform: translateY(-2px); box-shadow: 0 6px 0 0 var(--btn-edge), 0 12px 22px -4px var(--btn-cast); }
.btn:active { transform: translateY(3px); box-shadow: 0 1px 0 0 var(--btn-edge), 0 2px 6px -2px var(--btn-cast); transition-duration: var(--dur-press); }
.btn:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 4px; border-radius: var(--radius-pill); }
.btn[disabled], .btn[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; pointer-events: none; transform: none; }
.btn__arrow { transition: transform var(--dur-short) var(--ease-press); }
.btn:hover .btn__arrow { transform: translateX(3px); }

.btn--sm { padding: 0.55rem 1rem; min-height: 2.5rem; font-size: var(--text-sm); }
.btn--lg { padding: 1rem 1.7rem; min-height: 3.5rem; font-size: var(--text-lg); }

.btn--soft {
  --btn-face: var(--color-paper); --btn-edge: transparent; --btn-cast: var(--color-ink-cast);
  box-shadow: var(--shadow-contact), 0 8px 18px -10px var(--btn-cast);
  outline: 1.5px solid var(--color-rule); outline-offset: -1.5px;
}
.btn--soft:hover  { box-shadow: var(--shadow-contact), 0 14px 24px -12px var(--btn-cast); }
.btn--soft:active { box-shadow: var(--shadow-contact); }
.btn--soft:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 4px; }

@media (pointer: coarse) { .btn { min-height: 3rem; } }

/* star-burst — one firing per primary click */
.star-burst {
  position: fixed; width: 26px; height: 26px; margin: -13px 0 0 -13px; pointer-events: none; z-index: 30;
  background:
    linear-gradient(90deg, transparent 46%, var(--color-accent-3) 46% 54%, transparent 54%),
    linear-gradient(0deg,  transparent 46%, var(--color-accent-3) 46% 54%, transparent 54%);
  animation: star-burst 420ms var(--ease-out) forwards;
}
@keyframes star-burst {
  0%   { transform: scale(0) rotate(0deg);    opacity: 1; }
  60%  { transform: scale(1.25) rotate(35deg); opacity: 0.9; }
  100% { transform: scale(1.45) rotate(45deg); opacity: 0; }
}

/* ── hero (H9, off-centre: text left, art right) ──────────────────────── */
.hero { padding-block: var(--space-xl) var(--space-2xl); }
.hero__grid { display: grid; gap: var(--space-xl); align-items: center; }
@media (min-width: 60rem) {
  .hero { padding-block: var(--space-2xl) var(--space-3xl); }
  .hero__grid { grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr); gap: var(--space-2xl); }
}
.hero__kicker { color: var(--color-ink-3); margin-bottom: var(--space-sm); }
.hero h1 { font-size: var(--text-display); max-width: 12ch; }
.hero h1 .loopword {
  color: inherit; white-space: nowrap;
  background-image: linear-gradient(var(--color-accent) 0 0);
  background-repeat: no-repeat; background-size: 100% 0.3em; background-position: 0 86%;
  -webkit-box-decoration-break: clone; box-decoration-break: clone;
}
.hero__lede { font-size: var(--text-lg); color: var(--color-ink-2); max-width: 34ch; margin-top: var(--space-md); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-sm) var(--space-md); margin-top: var(--space-lg); align-items: center; }
.hero__fine { margin-top: var(--space-md); color: var(--color-ink-3); }

/* ── the practice card: Tier-A CSS art of the real extension timeline ─── */
.practice {
  --tilt: -2deg;
  position: relative;
  background: var(--color-paper);
  border-radius: var(--radius-card);
  padding: var(--space-md);
  box-shadow: var(--shadow-contact), var(--shadow-ambient), 0 0 0 1.5px var(--color-rule);
  transform: rotate(var(--tilt));
  max-width: 34rem; justify-self: center; width: 100%;
}
.practice__stage {
  position: relative; aspect-ratio: 16 / 10; border-radius: 14px; overflow: hidden;
  background: var(--tint-cyan);
  display: grid; place-items: center;
}
.practice__counts {
  display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 6px; width: 86%;
}
.count {
  aspect-ratio: 1; border-radius: 10px; display: grid; place-items: center;
  font: 600 var(--text-sm)/1 var(--font-display);
  background: var(--color-paper); color: var(--color-ink-3);
  box-shadow: var(--shadow-contact);
}
.count--loop { background: var(--color-accent-3); color: var(--color-paper); }
.count--now  { background: var(--color-accent); color: var(--color-ink); }
.practice__chips {
  position: absolute; left: var(--space-xs); right: var(--space-xs); top: var(--space-xs);
  display: flex; justify-content: space-between; gap: var(--space-2xs);
}
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-label); font-size: 0.6875rem; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 5px 9px; border-radius: var(--radius-pill);
  background: var(--color-paper); color: var(--color-ink); box-shadow: var(--shadow-contact);
  white-space: nowrap;
}
.chip__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--color-accent-3); }
.practice__label {
  position: absolute; left: var(--space-xs); bottom: var(--space-xs);
  font-family: var(--font-label); font-size: 0.6875rem; letter-spacing: 0.06em; color: var(--color-ink-2);
}

.timeline { margin-top: var(--space-md); }
.timeline__track {
  position: relative; height: 12px; border-radius: var(--radius-pill);
  background: var(--color-paper-3);
}
.timeline__loop {
  position: absolute; top: 0; bottom: 0; left: 38%; width: 30%;
  border-radius: var(--radius-pill); background: var(--color-accent-3);
}
.timeline__marker {
  position: absolute; top: -7px; width: 4px; height: 26px; border-radius: 2px; background: var(--color-ink);
}
.timeline__marker--a { left: calc(38% - 2px); }
.timeline__marker--b { left: calc(68% - 2px); }
.playhead { /* the character: pear dot riding the loop */
  position: absolute; top: 50%; left: 38%; width: 22px; height: 22px; margin: -11px 0 0 -11px;
  border-radius: 50%; background: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-paper), 0 4px 10px -2px var(--color-accent-cast);
  animation: playhead 2.4s linear infinite;
  transition: transform var(--dur-mid) var(--ease-spring);
}
.practice:hover .playhead { transform: scale(1.25); }
@keyframes playhead {
  0%   { left: 38%; }
  100% { left: 68%; }
}
.timeline__times {
  display: flex; justify-content: space-between; margin-top: var(--space-sm);
  font-family: var(--font-label); font-size: var(--text-xs); color: var(--color-ink-2);
}
.timeline__times b { color: var(--color-ink); font-weight: 500; }

/* ── section heads ────────────────────────────────────────────────────── */
.section-head { max-width: 40rem; margin-bottom: var(--space-xl); }
.section-head h2 { font-size: var(--text-display-s); }
.section-head p { margin-top: var(--space-sm); color: var(--color-ink-2); font-size: var(--text-lg); }

/* ── F4 step sequence: the practice loop, numbered ────────────────────── */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-md); }
.step {
  display: grid; gap: var(--space-md); align-items: center;
  padding: var(--space-lg) var(--space-md);
  border-radius: var(--radius-card);
  transition: transform var(--dur-mid) var(--ease-spring), background-color var(--dur-mid) var(--ease-out);
}
.step--pear  { background: var(--tint-pear); }
.step--cyan  { background: var(--tint-cyan); }
.step--coral { background: var(--tint-coral); }
.step--mint  { background: var(--tint-mint); }
.step--lav   { background: var(--tint-lav); }
@media (hover: hover) and (pointer: fine) {
  .step:hover { transform: translateY(-4px); }
}
.step__num {
  font: 700 var(--text-stage)/0.85 var(--font-display);
  letter-spacing: -0.05em; color: var(--color-ink); white-space: nowrap;
}
.step__num small {
  display: block; margin-top: var(--space-2xs);
  font-family: var(--font-label); font-size: var(--text-xs); font-weight: 400; letter-spacing: 0.1em; color: var(--color-ink-2);
}
.step h3 { font-size: var(--text-2xl); margin-bottom: var(--space-xs); }
.step__body p { color: var(--color-ink-2); max-width: 46ch; }
.step__art { display: grid; place-items: center; min-height: 8rem; }

@media (min-width: 48rem) {
  .step { grid-template-columns: 12rem minmax(0, 1fr) minmax(0, 15rem); padding: var(--space-xl) var(--space-lg); }
  .step:nth-child(even) { grid-template-columns: minmax(0, 15rem) minmax(0, 1fr) 12rem; }
  .step:nth-child(even) .step__art { order: -1; }
  .step:nth-child(even) .step__num { order: 1; text-align: right; }
}
@media (min-width: 60rem) {
  .step:nth-child(2) { margin-inline-start: var(--space-xl); }
  .step:nth-child(4) { margin-inline-start: var(--space-xl); }
}

/* mini art per stage — all CSS, all honest to the product */
.mini { width: 100%; max-width: 15rem; }
.mini-loop { position: relative; height: 10px; border-radius: var(--radius-pill); background: var(--color-paper); }
.mini-loop::before { content: ""; position: absolute; inset: 0 30% 0 25%; border-radius: inherit; background: var(--color-accent-3); }
.mini-loop__x {
  display: flex; justify-content: center; gap: var(--space-2xs); margin-top: var(--space-sm);
}
.speed { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; }
.speed span {
  font-family: var(--font-label); font-size: var(--text-sm); padding: 6px 10px; border-radius: var(--radius-pill);
  background: var(--color-paper); box-shadow: var(--shadow-contact); color: var(--color-ink-2);
}
.speed span.is-on { background: var(--color-ink); color: var(--color-paper); }
.mirror { display: flex; align-items: center; gap: var(--space-sm); font: 700 var(--text-xl)/1 var(--font-display); }
.mirror span { padding: var(--space-xs) var(--space-sm); border-radius: 14px; background: var(--color-paper); box-shadow: var(--shadow-contact); }
.mirror span + span { transform: scaleX(-1); }
.mirror i { font-style: normal; font-family: var(--font-label); font-size: var(--text-sm); color: var(--color-ink-2); }
.rec { display: inline-flex; align-items: center; gap: var(--space-2xs); padding: var(--space-xs) var(--space-sm); border-radius: var(--radius-pill); background: var(--color-paper); box-shadow: var(--shadow-contact); font-family: var(--font-label); font-size: var(--text-sm); }
.rec::before { content: ""; width: 12px; height: 12px; border-radius: 50%; background: var(--color-accent-3); }
.compare { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; width: 100%; max-width: 15rem; }
.compare div {
  aspect-ratio: 3 / 4; border-radius: 12px; background: var(--color-paper); box-shadow: var(--shadow-contact);
  display: grid; place-items: end start; padding: 8px; font-family: var(--font-label); font-size: 0.6875rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-ink-2);
}
.compare div:last-child { background: var(--tint-pear); }
.compare__tabs { grid-column: 1 / -1; display: flex; gap: 6px; justify-content: center; }
.compare__tabs span { font-family: var(--font-label); font-size: var(--text-xs); padding: 3px 9px; border-radius: var(--radius-pill); background: var(--color-paper); }
.compare__tabs span.is-on { background: var(--color-accent-2); color: var(--color-paper); }

.aside {
  margin-top: var(--space-xl); padding: var(--space-md) var(--space-lg);
  border: var(--rule-dash); border-radius: var(--radius-card);
  color: var(--color-ink-2); max-width: 46rem; transform: rotate(0.6deg);
}
.aside strong { color: var(--color-ink); }

/* ── pricing: one honest line, coral moment ───────────────────────────── */
.price { display: grid; gap: var(--space-xl); align-items: center; }
@media (min-width: 60rem) { .price { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); } }
.price__big {
  font: 700 clamp(6rem, 18vw, 13rem)/0.8 var(--font-display); letter-spacing: -0.06em; color: var(--color-accent-3-deep);
}
.price__big span { font-size: 0.32em; letter-spacing: -0.02em; color: var(--color-ink); margin-left: 0.15em; }
.price h2 { font-size: var(--text-display-s); }
.price__then { font-size: var(--text-xl); margin-top: var(--space-sm); color: var(--color-ink); font-weight: 600; letter-spacing: -0.01em; }
.price__list { list-style: none; padding: 0; margin: var(--space-md) 0 var(--space-lg); display: grid; gap: var(--space-2xs); color: var(--color-ink-2); }
.price__list li { display: flex; gap: var(--space-xs); align-items: baseline; }
.price__list li::before { content: ""; flex: none; width: 10px; height: 10px; border-radius: 3px; background: var(--color-accent); transform: rotate(45deg) translateY(-1px); }
.price__legacy { margin-top: var(--space-lg); padding: var(--space-sm) var(--space-md); border-radius: var(--radius-input); background: var(--tint-lav); color: var(--color-ink); }

/* ── privacy promise ──────────────────────────────────────────────────── */
.promise { display: grid; gap: var(--space-md); }
@media (min-width: 60rem) { .promise { grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr); align-items: end; } }
.promise h2 { font-size: var(--text-2xl); max-width: 22ch; }
.promise p { color: var(--color-ink-2); max-width: 44ch; }

/* ── footer (Ft2) ─────────────────────────────────────────────────────── */
.footer { border-top: var(--rule-dash); padding-block: var(--space-lg); }
.footer__row { display: flex; flex-wrap: wrap; gap: var(--space-xs) var(--space-md); align-items: center; justify-content: space-between; }
.footer__links { display: flex; flex-wrap: wrap; gap: var(--space-2xs) var(--space-md); }
.footer__links a { color: var(--color-ink-2); font-size: var(--text-sm); text-decoration: none; white-space: nowrap; }
.footer__links a:hover { color: var(--color-ink); text-decoration: underline; text-decoration-color: var(--color-accent-2); }
.footer__credit { color: var(--color-ink-3); font-size: var(--text-sm); }

/* ── legal pages: conversational Q&A cards ────────────────────────────── */
.doc-head { padding-block: var(--space-xl) var(--space-lg); }
.doc-head h1 { font-size: var(--text-display-s); max-width: 16ch; }
.doc-head p { margin-top: var(--space-sm); color: var(--color-ink-2); max-width: 52ch; }
.doc-head .mono { color: var(--color-ink-3); margin-bottom: var(--space-sm); display: block; }
.doc { display: grid; gap: var(--space-sm); max-width: var(--doc-max); padding-bottom: var(--space-2xl); }
.qa {
  background: var(--color-paper); border-radius: var(--radius-card);
  padding: var(--space-md) var(--space-lg); box-shadow: var(--shadow-contact), 0 0 0 1.5px var(--color-rule);
}
.qa:nth-child(5n+1) { background: var(--tint-pear); box-shadow: none; }
.qa:nth-child(5n+3) { background: var(--tint-cyan); box-shadow: none; }
.qa:nth-child(5n+5) { background: var(--tint-mint); box-shadow: none; }
.qa h2 { font-size: var(--text-xl); letter-spacing: -0.02em; margin-bottom: var(--space-xs); }
.qa ul { margin: 0; padding-left: 1.2rem; display: grid; gap: var(--space-2xs); color: var(--color-ink-2); }
.qa ul li::marker { color: var(--color-accent-3); }
.qa p { color: var(--color-ink-2); }
.qa strong { color: var(--color-ink); font-weight: 600; }
.doc-back { margin-top: var(--space-md); }

/* ── reveal (headings only, JS-gated so content never hides without JS) ─ */
.js .reveal { opacity: 0; transform: translateY(12px); transition: opacity var(--dur-long) var(--ease-snap), transform var(--dur-long) var(--ease-snap); }
.js .reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  .playhead { animation: none; left: 52%; }
  .btn, .step, .btn__arrow, .playhead { transition: background-color 150ms linear, opacity 150ms linear; }
  .btn:hover, .btn:active, .step:hover, .practice:hover .playhead { transform: none; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .star-burst { display: none; }
}

.qa ul + p { margin-top: var(--space-sm); }