/* 10 Words: product page and privacy policy.
   Colors are sampled from the app icon: indigo field, cream flashcards,
   an ember speech bubble. Two rules hold the system together:
   cream is for things you learn (words, lines, lessons), and ember
   means voice (listen, speak, record). */

:root {
  --night: #120C55;
  --indigo-deep: #1B1380;
  --indigo: #3B31E4;
  --indigo-ink: #3026C5;
  --iris: #A58CFC;
  --cream: #FCF7F0;
  --paper: #EFE5D8;
  --ember-hi: #FD8846;
  --ember: #F66C33;
  --ember-deep: #E0521A;
  --ink: #1D1650;
  --ink-soft: #5B547E;
  --on-indigo: #FFFFFF;
  --on-indigo-soft: rgba(255, 255, 255, 0.78);
  --on-indigo-quiet: rgba(255, 255, 255, 0.62);
  --hairline: rgba(255, 255, 255, 0.14);
  --wash: rgba(255, 255, 255, 0.08);

  /* On Apple devices ui-rounded is SF Pro Rounded, the typeface of the app itself */
  --font-round: ui-rounded, "SF Pro Rounded", "Nunito", system-ui, sans-serif;
  --font-text: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.25rem;
  --step-2: clamp(1.375rem, 1.15rem + 0.9vw, 1.75rem);
  --step-3: clamp(2rem, 1.35rem + 2.7vw, 3.25rem);
  --step-4: clamp(2.75rem, 1.75rem + 4.6vw, 5rem);

  --gutter: clamp(20px, 5vw, 48px);
  --max: 1160px;
  --r-card: 30px;
  --r-panel: 26px;
  --r-shot: 26px;
  --lift: 0 30px 60px rgba(8, 4, 48, 0.45), 0 8px 18px rgba(8, 4, 48, 0.25);
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);

  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

/* Without JS the page still reads top to bottom; only the toys go away */
html:not(.js) .langs,
html:not(.js) .voice,
html:not(.js) .deck-controls,
html:not(.js) .card-hint,
html:not(.js) .device-tabs,
html:not(.js) .rail-btns,
html:not(.js) .lang-tabs {
  display: none;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--night);
  color: var(--on-indigo);
  font: 400 var(--step-0)/1.55 var(--font-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  overflow-x: clip;
}

/* The page starts as bright as the icon and sinks into night as you read */
.sky {
  position: absolute;
  inset: 0 0 auto;
  height: 260vh;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(42% 30% at 74% 22%, rgba(165, 140, 252, 0.55), transparent 70%),
    radial-gradient(70% 34% at 8% 0%, rgba(111, 94, 252, 0.7), transparent 75%),
    linear-gradient(180deg, #3B31E4 0%, #3027C9 22%, #2219A0 44%, #1B1380 64%, var(--night) 100%);
}

.sky::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.07;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

img {
  max-width: 100%;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

a,
button {
  touch-action: manipulation;
}

:focus-visible {
  outline: 3px solid var(--ember-hi);
  outline-offset: 3px;
}

.wrap {
  width: min(var(--max), 100% - 2 * var(--gutter));
  margin-inline: auto;
}

.wrap--doc {
  width: min(820px, 100% - 2 * var(--gutter));
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 50;
  padding: 10px 16px;
  border-radius: 12px;
  background: var(--cream);
  color: var(--indigo-ink);
  font: 700 var(--step--1) var(--font-round);
  text-decoration: none;
}

.skip-link:focus {
  top: 12px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ------------------------------------------------------------------
   Top bar
   ------------------------------------------------------------------ */

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  transition: background-color 0.25s ease, box-shadow 0.25s ease;
}

.topbar.is-stuck {
  background: rgba(18, 12, 85, 0.78);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  backdrop-filter: saturate(160%) blur(16px);
  box-shadow: 0 1px 0 var(--hairline);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}

.topbar-start {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

/* Back sits first in the bar, the way a back button does on iPhone */
.back-btn {
  display: inline-flex;
  flex: none;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: 44px;
  min-height: 44px;
  padding: 0 16px 0 10px;
  border-radius: 999px;
  background: var(--wash);
  box-shadow: inset 0 0 0 1px var(--hairline);
  color: var(--on-indigo-soft);
  font: 700 var(--step--1)/1 var(--font-round);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.back-btn:hover {
  background: rgba(255, 255, 255, 0.14);
  color: var(--on-indigo);
}

.back-btn svg {
  width: 20px;
  height: 20px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.back-btn--app {
  padding-right: 14px;
  color: var(--on-indigo);
  font: 800 1.0625rem/1 var(--font-round);
}

.back-btn--app img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

@media (max-width: 720px) {
  .back-btn:not(.back-btn--app) {
    padding: 0;
  }

  .back-label {
    display: none;
  }
}

/* The narrowest phones keep the icons and drop the app name */
@media (max-width: 380px) {
  .topbar-start .brand-name {
    display: none;
  }
}

@media (max-width: 340px) {
  .back-btn--app .brand-name {
    display: none;
  }
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font: 800 1.125rem/1 var(--font-round);
  letter-spacing: -0.01em;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.topbar nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 3vw, 28px);
}

.topbar nav a:not(.get-btn) {
  font: 700 var(--step--1)/1 var(--font-round);
  color: var(--on-indigo-soft);
  text-decoration: none;
  padding: 14px 2px;
}

.topbar nav a:not(.get-btn):hover {
  color: var(--on-indigo);
}

.get-btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  background: var(--cream);
  color: var(--indigo-ink);
  font: 800 0.9375rem/1 var(--font-round);
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.2s var(--ease-out);
}

.get-btn:hover {
  transform: translateY(-1px);
}

@media (max-width: 560px) {
  .topbar .nav-secondary {
    display: none;
  }
}

/* ------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------ */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(48px, 7vw, 72px);
  padding: clamp(28px, 6vw, 64px) 0 clamp(80px, 11vw, 140px);
}

@media (min-width: 940px) {
  .hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    min-height: min(800px, calc(100svh - 68px));
    padding: 24px 0 clamp(24px, 4vw, 56px);
  }
}

.hero h1 {
  margin: 0 0 22px;
  font: 800 var(--step-4)/0.98 var(--font-round);
  letter-spacing: -0.025em;
  text-wrap: balance;
  max-width: 11ch;
}

.lede {
  margin: 0 0 34px;
  font-size: var(--step-1);
  line-height: 1.5;
  color: var(--on-indigo-soft);
  max-width: 30ch;
}

.get {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 28px;
}

.store-badge {
  display: inline-block;
  border-radius: 12px;
  line-height: 0;
  transition: transform 0.2s var(--ease-out);
}

.store-badge:hover {
  transform: translateY(-2px);
}

.store-badge img {
  display: block;
  width: auto;
  height: 54px;
}

.facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
  font: 700 var(--step--1)/1.3 var(--font-round);
  color: var(--on-indigo-soft);
}

.facts li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.facts svg {
  width: 16px;
  height: 16px;
  flex: none;
  fill: currentColor;
  opacity: 0.9;
}

/* ------------------------------------------------------------------
   Live flashcard deck
   ------------------------------------------------------------------ */

.deck {
  position: relative;
  width: min(100%, 430px);
  margin-inline: auto;
}

.deck-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 12px;
  margin-bottom: 26px;
}

.progress {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-variant-numeric: tabular-nums;
  font: 700 var(--step--1)/1 var(--font-round);
  color: var(--on-indigo-soft);
  white-space: nowrap;
}

.progress b {
  color: var(--on-indigo);
  font-weight: 800;
}

@media (max-width: 400px) {
  .progress .unit {
    display: none;
  }
}

.progress svg {
  width: 44px;
  height: 44px;
  transform: rotate(-90deg);
  flex: none;
}

.progress .track {
  stroke: rgba(255, 255, 255, 0.2);
}

.progress .fill {
  stroke: var(--cream);
  stroke-linecap: round;
  transition: stroke-dashoffset 0.6s var(--ease-out);
}

.langs {
  display: inline-flex;
  padding: 4px;
  border-radius: 999px;
  background: var(--wash);
  box-shadow: inset 0 0 0 1px var(--hairline);
}

.langs button {
  min-width: 44px;
  min-height: 40px;
  padding: 0 9px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font: 700 0.875rem/1 var(--font-round);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.langs button:hover,
.device-tabs button:hover,
.lang-tabs button:hover {
  background: rgba(255, 255, 255, 0.12);
}

.langs button[aria-checked="true"] {
  background: var(--cream);
  color: var(--indigo-ink);
}

.stage {
  position: relative;
  aspect-ratio: 1 / 1.08;
}

.card-under,
.card {
  position: absolute;
  inset: 0;
  border-radius: var(--r-card);
}

.card-under {
  background: var(--paper);
  box-shadow: var(--lift);
  transform: rotate(-7deg) translate(-5%, 3%);
}

.card {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  perspective: 1400px;
  transform: rotate(2.5deg);
  touch-action: pan-y;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
}

.card.is-dragging {
  transition: none;
}

.card:focus-visible {
  outline-offset: 6px;
}

.card-inner {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  transform-style: preserve-3d;
  transition: transform 0.6s var(--ease-out);
}

.card.is-flipped .card-inner {
  transform: rotateY(180deg);
}

.face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 28px 56px;
  border-radius: inherit;
  background: var(--cream);
  color: var(--ink);
  text-align: center;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.9),
    inset 0 -8px 0 rgba(29, 22, 80, 0.05),
    var(--lift);
}

.face.back {
  transform: rotateY(180deg);
}

.topic {
  font: 700 0.875rem/1.2 var(--font-round);
  color: var(--ink-soft);
}

.word {
  display: block;
  margin: 12px 0 14px;
  font: 800 clamp(2.4rem, 1.7rem + 3.4vw, 3.6rem)/1.04 var(--font-round);
  letter-spacing: -0.015em;
  color: var(--indigo-ink);
  overflow-wrap: anywhere;
  text-wrap: balance;
}

.example {
  font: italic 400 1.0625rem/1.45 var(--font-text);
  color: var(--ink-soft);
  max-width: 24ch;
}

.card-hint {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 22px;
  font: 700 0.8125rem/1 var(--font-round);
  color: #8C86AA;
}

.voice {
  position: absolute;
  z-index: 3;
  top: -22px;
  right: -14px;
  width: 78px;
  height: 66px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  filter: drop-shadow(0 14px 22px rgba(224, 82, 26, 0.45));
  transition: transform 0.2s var(--ease-out);
  -webkit-tap-highlight-color: transparent;
}

.voice:hover {
  transform: scale(1.05) rotate(-3deg);
}

.voice svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.voice .bar {
  fill: #fff;
  transform-box: fill-box;
  transform-origin: center;
}

.voice.is-speaking .bar {
  animation: talk 0.5s ease-in-out infinite alternate;
}

.voice.is-speaking .bar:nth-of-type(2) {
  animation-delay: -0.25s;
}

.voice.is-speaking .bar:nth-of-type(3) {
  animation-delay: -0.4s;
}

@keyframes talk {
  from { transform: scaleY(0.45); }
  to { transform: scaleY(1.1); }
}

.deck-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 34px;
}

.ctl {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 52px;
  min-height: 52px;
  padding: 0 18px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 999px;
  background: var(--wash);
  font: 800 1rem/1 var(--font-round);
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s var(--ease-out), opacity 0.2s ease;
}

.ctl:hover {
  background: rgba(255, 255, 255, 0.16);
}

.ctl:disabled {
  opacity: 0.35;
  cursor: default;
}

.ctl svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ctl-next {
  padding: 0 22px 0 26px;
  border-color: transparent;
  background: var(--cream);
  color: var(--indigo-ink);
}

.ctl-next:hover {
  background: #fff;
}

.ctl-icon {
  padding: 0;
}

.deck-note {
  min-height: 1.4em;
  margin: 18px auto 0;
  max-width: 36ch;
  text-align: center;
  font-size: var(--step--1);
  color: var(--on-indigo-quiet);
}

/* Session complete: the card turns into the invitation */
.card-done {
  cursor: default;
}

.face.done {
  gap: 4px;
}

.done-title {
  font: 800 clamp(1.9rem, 1.5rem + 2vw, 2.6rem)/1.05 var(--font-round);
  color: var(--indigo-ink);
  letter-spacing: -0.015em;
}

.done-text {
  margin: 8px 0 22px;
  max-width: 24ch;
  color: var(--ink-soft);
  font-size: 1rem;
}

.done .store-badge img {
  height: 48px;
}

.again {
  margin-top: 14px;
  min-height: 44px;
  padding: 0 14px;
  border: 0;
  background: none;
  color: var(--indigo-ink);
  font: 800 0.9375rem var(--font-round);
  text-decoration: underline;
  text-underline-offset: 4px;
  cursor: pointer;
}

/* One orchestrated entrance: the deck is dealt onto the table */
.js .deck.is-dealing .card-under {
  animation: deal-under 0.9s var(--ease-out) both;
}

.js .deck.is-dealing .card {
  animation: deal-top 0.9s 0.12s var(--ease-out) both;
}

.js .deck.is-dealing .voice {
  animation: pop 0.5s 0.75s var(--ease-out) both;
}

@keyframes deal-under {
  from { opacity: 0; transform: rotate(-16deg) translate(-18%, 22%); }
  to { opacity: 1; transform: rotate(-7deg) translate(-5%, 3%); }
}

@keyframes deal-top {
  from { opacity: 0; transform: rotate(14deg) translate(16%, 26%); }
  to { opacity: 1; transform: rotate(2.5deg); }
}

@keyframes pop {
  from { opacity: 0; transform: scale(0.4) rotate(-20deg); }
  to { opacity: 1; transform: scale(1) rotate(0); }
}

.card.is-leaving-left {
  transition: transform 0.35s ease-in, opacity 0.35s ease-in;
  transform: translateX(-120%) rotate(-14deg);
  opacity: 0;
}

.card.is-leaving-right {
  transition: transform 0.35s ease-in, opacity 0.35s ease-in;
  transform: translateX(120%) rotate(14deg);
  opacity: 0;
}

.card.is-arriving {
  animation: arrive 0.45s var(--ease-out) both;
}

@keyframes arrive {
  from { opacity: 0; transform: rotate(-4deg) translate(-4%, 4%) scale(0.96); }
  to { opacity: 1; transform: rotate(2.5deg); }
}

/* ------------------------------------------------------------------
   Sections
   ------------------------------------------------------------------ */

.section {
  padding: clamp(72px, 10vw, 136px) 0;
}

.section + .section {
  border-top: 1px solid var(--hairline);
}

.section h2 {
  margin: 0 0 18px;
  font: 800 var(--step-3)/1.04 var(--font-round);
  letter-spacing: -0.02em;
  text-wrap: balance;
  max-width: 18ch;
}

.section h2 + p,
.section .body {
  margin: 0;
  max-width: 34rem;
  color: var(--on-indigo-soft);
}

.split {
  display: grid;
  gap: 44px;
  align-items: center;
}

@media (min-width: 940px) {
  .split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 72px;
  }

  .split--reverse > :first-child {
    order: 2;
  }
}

/* Inside the app ------------------------------------------------------ */

.gallery-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px 32px;
}

.device-tabs {
  display: inline-flex;
  padding: 4px;
  border-radius: 999px;
  background: var(--wash);
  box-shadow: inset 0 0 0 1px var(--hairline);
}

.device-tabs button {
  min-height: 44px;
  padding: 0 20px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font: 800 0.9375rem/1 var(--font-round);
  cursor: pointer;
}

.device-tabs button[aria-selected="true"] {
  background: var(--cream);
  color: var(--indigo-ink);
}

.rail-frame {
  position: relative;
  margin-top: 36px;
}

/* The rail bleeds to both edges of the window; its first card lines up with the text */
.rail {
  --inset: max(var(--gutter), calc(50vw - var(--max) / 2));
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: clamp(208px, 60vw, 268px);
  gap: clamp(16px, 2.4vw, 26px);
  margin: 0 calc(50% - 50vw);
  padding: 18px var(--inset) 44px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: var(--inset);
  scrollbar-width: none;
}

.rail::-webkit-scrollbar {
  display: none;
}

.rail[hidden] {
  display: none;
}

.rail--ipad {
  grid-auto-columns: clamp(264px, 80vw, 420px);
}

.shot {
  --tilt: 0deg;
  display: block;
  padding: 0;
  border: 0;
  border-radius: var(--r-shot);
  background: none;
  cursor: zoom-in;
  scroll-snap-align: start;
  transform: rotate(var(--tilt));
  transition: transform 0.35s var(--ease-out);
}

.shot:nth-child(odd) {
  --tilt: -1.4deg;
}

.shot:nth-child(even) {
  --tilt: 1.4deg;
}

.shot:hover,
.shot:focus-visible {
  transform: rotate(0deg) translateY(-6px);
}

.shot picture,
.shot img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-shot);
}

.shot img {
  box-shadow: var(--lift);
}

.rail-btns {
  display: none;
  gap: 10px;
}

@media (hover: hover) and (min-width: 700px) {
  .rail-btns {
    display: flex;
  }
}

/* Lightbox (markup built by gallery.js) */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  overscroll-behavior: contain;
  display: flex;
  flex-direction: column;
  background: rgba(10, 6, 46, 0.94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.lightbox[hidden] {
  display: none;
}

.no-scroll {
  overflow: hidden;
}

.lb-stage {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 16px 8px;
}

.lb-stage picture {
  display: contents;
}

.lb-stage img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  border-radius: 22px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
}

.lb-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  width: min(760px, 100% - 32px);
  margin: 0 auto;
  padding: 12px 0 calc(16px + env(safe-area-inset-bottom));
}

.lb-text {
  flex: 1;
  min-width: 0;
  text-align: center;
}

.lb-text b {
  display: block;
  font: 800 1.0625rem/1.3 var(--font-round);
}

.lb-text span {
  display: block;
  font-size: var(--step--1);
  color: var(--on-indigo-soft);
}

.lb-count {
  position: absolute;
  top: 22px;
  left: 20px;
  font: 700 var(--step--1) var(--font-round);
  color: var(--on-indigo-soft);
}

.lb-btn {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  flex: none;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 50%;
  background: var(--wash);
  font-size: 1.125rem;
  cursor: pointer;
}

.lb-btn:hover {
  background: rgba(255, 255, 255, 0.16);
}

.lb-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

.lb-close {
  position: absolute;
  top: 12px;
  right: 12px;
}

/* Words for real life ------------------------------------------------- */

.topics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.topics li {
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--wash);
  box-shadow: inset 0 0 0 1px var(--hairline);
  font: 700 0.9375rem/1.2 var(--font-round);
}

.topics li.is-new {
  background: var(--cream);
  box-shadow: none;
  color: var(--indigo-ink);
}

.topics li.more {
  background: none;
  color: var(--on-indigo-quiet);
}

.legend {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 22px;
  font-size: var(--step--1);
  color: var(--on-indigo-soft);
}

.legend i {
  width: 22px;
  height: 14px;
  border-radius: 999px;
  background: var(--cream);
}

/* Practice ------------------------------------------------------------ */

.modes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 36px 22px;
  margin: 52px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 940px) {
  .modes {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 48px 36px;
  }
}

.mode-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin-bottom: 16px;
  border-radius: 16px;
  background: var(--wash);
  box-shadow: inset 0 0 0 1px var(--hairline);
}

.mode-icon svg {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: var(--cream);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.mode-icon.is-voice {
  background: linear-gradient(160deg, var(--ember-hi), var(--ember-deep));
  box-shadow: 0 10px 22px rgba(224, 82, 26, 0.35);
}

.mode-icon.is-voice svg {
  stroke: #fff;
}

.modes h3 {
  margin: 0 0 6px;
  font: 800 1.1875rem/1.2 var(--font-round);
}

.modes p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--on-indigo-soft);
}

/* Cream panels hold learnable things: a curve, a dialogue, lessons */
.panel {
  position: relative;
  margin: 0;
  padding: clamp(22px, 3.4vw, 34px);
  border-radius: var(--r-panel);
  background: var(--cream);
  color: var(--ink);
  box-shadow: var(--lift);
}

.panel-title {
  margin: 0 0 4px;
  font: 800 1.0625rem/1.3 var(--font-round);
  color: var(--ink);
}

.panel-sub {
  margin: 0 0 18px;
  font-size: var(--step--1);
  color: var(--ink-soft);
}

/* Smart review curve */
.curve svg {
  display: block;
  width: 100%;
  height: auto;
}

.curve .axis {
  stroke: #D9CFC0;
  stroke-width: 1.5;
}

.curve .forget {
  stroke: #B7AEDA;
  stroke-width: 2.5;
  stroke-dasharray: 5 6;
  fill: none;
}

.curve .remember {
  stroke: var(--indigo-ink);
  stroke-width: 4;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.curve .review {
  fill: var(--indigo-ink);
  stroke: var(--cream);
  stroke-width: 3;
}

.curve-axis {
  display: flex;
  justify-content: space-between;
  margin: 8px 0 0 7%;
  font: 700 0.8125rem/1.2 var(--font-round);
  color: var(--ink-soft);
}

.curve-key {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  font: 700 var(--step--1)/1.3 var(--font-round);
  color: var(--ink-soft);
}

.curve-key li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.curve-key i {
  width: 26px;
  height: 0;
  border-top: 4px solid var(--indigo-ink);
  border-radius: 2px;
}

.curve-key i.dashed {
  border-top: 3px dashed #B7AEDA;
}

/* Conversation */
.chat {
  display: grid;
  gap: 14px;
}

.chat-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid #E8DECF;
}

.line {
  max-width: 88%;
  padding: 14px 16px;
  border-radius: 20px;
  font-size: 1rem;
  line-height: 1.45;
}

.line small {
  display: block;
  margin-bottom: 4px;
  font: 800 0.75rem/1.2 var(--font-round);
  color: var(--ink-soft);
}

.line--them {
  border-bottom-left-radius: 6px;
  background: #fff;
  box-shadow: inset 0 0 0 1px #EAE1D3;
}

.line--you {
  justify-self: end;
  border-bottom-right-radius: 6px;
  background: var(--indigo-ink);
  color: #fff;
}

.line--you small {
  color: rgba(255, 255, 255, 0.78);
}

.speak {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 6px;
  font: 700 var(--step--1) var(--font-round);
  color: var(--ink-soft);
}

.mic {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(160deg, var(--ember-hi), var(--ember-deep));
  box-shadow: 0 10px 22px rgba(224, 82, 26, 0.35);
}

.mic svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: #fff;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.scenarios {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.scenarios li {
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--wash);
  box-shadow: inset 0 0 0 1px var(--hairline);
  font: 700 var(--step--1)/1.2 var(--font-round);
}

.art {
  display: block;
  width: min(100%, 260px);
  height: auto;
  margin: 0 0 24px;
}

.art--hero {
  width: min(100%, 440px);
  margin: 0 auto;
}

.ticks {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.ticks li {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--hairline);
  color: var(--on-indigo-soft);
  font-size: var(--step-1);
  line-height: 1.45;
}

.ticks li::before,
.notes li::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  margin-top: 0.55em;
  border-radius: 3px;
  background: var(--cream);
  transform: rotate(45deg);
}

/* Grammar + languages */
.duo {
  display: grid;
  gap: clamp(72px, 9vw, 96px);
}

@media (min-width: 940px) {
  .duo {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 80px;
  }
}

.duo .panel {
  margin-top: 36px;
}

.ladder {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ladder li {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 0;
  font: 700 1.0625rem/1.3 var(--font-round);
}

.ladder li::before {
  content: "";
  flex: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper);
  box-shadow: 0 0 0 4px rgba(48, 38, 197, 0.12);
}

.ladder li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 34px;
  bottom: -10px;
  width: 2px;
  background: #E3D8C8;
}

.ladder li.is-start::before {
  background: var(--indigo-ink);
}

.ladder .ladder-note {
  margin-left: auto;
  font: 700 0.8125rem/1 var(--font-round);
  color: var(--ink-soft);
}

.translations {
  display: grid;
  margin: 0;
}

.translations div {
  padding: 16px 0;
  border-top: 1px solid #E8DECF;
}

@media (min-width: 520px) {
  .translations {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .translations div:nth-child(odd) {
    padding-right: 16px;
  }
}

.translations dt {
  font: 700 0.8125rem/1.2 var(--font-round);
  color: var(--ink-soft);
}

.translations dd {
  margin: 6px 0 0;
  font: 800 clamp(1.25rem, 1.05rem + 0.8vw, 1.5rem)/1.2 var(--font-round);
  color: var(--indigo-ink);
}

.panel-word {
  margin: 0 0 18px;
  font: 800 clamp(2rem, 1.6rem + 1.8vw, 2.75rem)/1.05 var(--font-round);
  color: var(--ink);
  letter-spacing: -0.015em;
}

.panel-word span {
  display: block;
  margin-top: 6px;
  font: italic 400 1rem/1.4 var(--font-text);
  color: var(--ink-soft);
  letter-spacing: 0;
}

/* Motivation */
.habit {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 48px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.habit li {
  display: flex;
  align-items: center;
  gap: 16px;
}

.habit svg {
  width: 64px;
  height: 64px;
  flex: none;
}

.habit b {
  display: block;
  font: 800 1.5rem/1.1 var(--font-round);
}

.habit span {
  font-size: var(--step--1);
  color: var(--on-indigo-soft);
}

/* What's new ---------------------------------------------------------- */

.release {
  display: grid;
  gap: 40px;
}

@media (min-width: 940px) {
  .release {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 72px;
  }
}

.version {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 6px;
  font: 700 var(--step--1) var(--font-round);
  color: var(--on-indigo-soft);
}

.version b {
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--cream);
  color: var(--indigo-ink);
  font-weight: 800;
}

.notes {
  margin: 0;
  padding: 0;
  list-style: none;
  columns: 1;
}

@media (min-width: 700px) {
  .notes {
    columns: 2;
    column-gap: 40px;
  }
}

.notes li {
  break-inside: avoid;
  display: flex;
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--hairline);
  color: var(--on-indigo-soft);
}

.notes strong {
  color: var(--on-indigo);
  font-weight: 600;
}

/* Privacy band -------------------------------------------------------- */

.privacy-band {
  display: grid;
  gap: 28px;
  align-items: center;
  padding: clamp(28px, 4.5vw, 52px);
  border-radius: var(--r-panel);
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.03));
  box-shadow: inset 0 0 0 1px var(--hairline);
}

@media (min-width: 760px) {
  .privacy-band {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 36px;
  }
}

.privacy-band img {
  display: block;
  width: 132px;
  height: auto;
}

.privacy-band h2 {
  margin-bottom: 10px;
  font-size: var(--step-2);
  max-width: none;
}

.privacy-band p {
  margin: 0;
  max-width: 40rem;
  color: var(--on-indigo-soft);
}

.btn-line {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  font: 800 0.9375rem/1 var(--font-round);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.2s ease;
}

.btn-line:hover {
  background: var(--wash);
}

/* Final call ---------------------------------------------------------- */

/* The page ends the way it began: under the icon's indigo glow */
.finale {
  position: relative;
  isolation: isolate;
  padding: clamp(80px, 11vw, 150px) 0 clamp(64px, 8vw, 110px);
  text-align: center;
}

.finale::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(60% 70% at 50% 62%, rgba(85, 72, 246, 0.55), rgba(59, 49, 228, 0.18) 55%, transparent 80%);
}

.finale-art {
  display: block;
  width: clamp(112px, 26vw, 152px);
  height: auto;
  margin: 0 auto 36px;
  border-radius: 22.5%;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.16), var(--lift);
}

.finale h2 {
  margin: 0 auto 16px;
  font: 800 var(--step-3)/1.04 var(--font-round);
  letter-spacing: -0.02em;
  max-width: 16ch;
  text-wrap: balance;
}

.finale p {
  margin: 0 auto 32px;
  max-width: 30rem;
  color: var(--on-indigo-soft);
}

/* Footer -------------------------------------------------------------- */

.footer {
  padding: 28px 0 calc(28px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--hairline);
  font-size: var(--step--1);
  color: var(--on-indigo-quiet);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 28px;
}

.footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer a {
  display: inline-block;
  padding: 10px 0;
  color: var(--on-indigo-soft);
  text-decoration: none;
}

.footer a:hover {
  color: var(--on-indigo);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ------------------------------------------------------------------
   Privacy policy page
   ------------------------------------------------------------------ */

.policy-head {
  padding: clamp(24px, 5vw, 56px) 0 clamp(32px, 5vw, 48px);
}

.crumbs {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font: 700 var(--step--1)/1.4 var(--font-round);
  color: var(--on-indigo-soft);
}

.crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  opacity: 0.6;
}

.crumbs a {
  text-decoration: none;
}

.crumbs a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.policy-head h1 {
  margin: 0 0 14px;
  font: 800 var(--step-4)/1 var(--font-round);
  letter-spacing: -0.025em;
}

.policy-head .meta {
  margin: 0;
  color: var(--on-indigo-soft);
}

.policy-body {
  padding-bottom: clamp(72px, 10vw, 120px);
}

.app-privacy {
  position: relative;
  display: grid;
  gap: 18px;
  align-items: center;
  padding: clamp(24px, 4vw, 36px);
  border-radius: var(--r-panel);
  background: var(--cream);
  color: var(--ink);
  box-shadow: var(--lift);
}

@media (min-width: 640px) {
  .app-privacy {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

.app-privacy .label {
  margin: 0 0 12px;
  font: 800 0.9375rem/1 var(--font-round);
  color: var(--ink-soft);
}

.app-privacy .nc {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 8px;
  font: 800 clamp(1.5rem, 1.25rem + 1vw, 1.875rem)/1.1 var(--font-round);
  color: var(--ink);
}

.nc svg {
  width: 44px;
  height: 44px;
  flex: none;
}

.app-privacy p {
  margin: 0;
  color: var(--ink-soft);
}

.app-privacy img {
  display: block;
  width: 120px;
  height: auto;
}

/* On phones the shield perches on the card's corner, like the voice bubble on the deck */
@media (max-width: 639px) {
  .app-privacy {
    padding-right: 84px;
  }

  .app-privacy img {
    position: absolute;
    top: -30px;
    right: -10px;
    width: 96px;
  }
}

.glance {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 640px) {
  .glance {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.glance li {
  padding: 18px 20px;
  border-radius: 18px;
  background: var(--wash);
  box-shadow: inset 0 0 0 1px var(--hairline);
  color: var(--on-indigo-soft);
  font-size: 0.9375rem;
}

.glance b {
  display: block;
  margin-bottom: 4px;
  color: var(--on-indigo);
  font: 800 1.0625rem/1.3 var(--font-round);
}

.lang-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 52px 0 18px;
}

.lang-tabs button {
  min-height: 44px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  background: var(--wash);
  box-shadow: inset 0 0 0 1px var(--hairline);
  font: 800 0.9375rem/1 var(--font-round);
  cursor: pointer;
}

.lang-tabs button[aria-selected="true"] {
  background: var(--cream);
  box-shadow: none;
  color: var(--indigo-ink);
}

.policy {
  padding: clamp(26px, 5vw, 56px);
  border-radius: var(--r-panel);
  background: var(--cream);
  color: var(--ink);
  box-shadow: var(--lift);
}

.policy + .policy {
  margin-top: 28px;
}

.policy h2 {
  margin: 0 0 6px;
  font: 800 var(--step-2)/1.15 var(--font-round);
  color: var(--ink);
}

.policy .policy-date {
  margin: 0 0 8px;
  color: var(--ink-soft);
  font-size: var(--step--1);
}

.policy h3 {
  margin: 34px 0 10px;
  font: 800 1.25rem/1.25 var(--font-round);
  color: var(--indigo-ink);
}

.policy p,
.policy li {
  max-width: 64ch;
  line-height: 1.65;
}

.policy p {
  margin: 0 0 12px;
}

.policy ul {
  margin: 0 0 12px;
  padding-left: 22px;
}

.policy li {
  margin: 6px 0;
}

.policy li::marker {
  color: var(--indigo-ink);
}

.policy a {
  color: var(--indigo-ink);
  font-weight: 600;
  text-underline-offset: 3px;
}

/* ------------------------------------------------------------------
   Reduced motion: keep every state, drop the travel
   ------------------------------------------------------------------ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .card-inner {
    transition: none;
  }
}