/* ==========================================================================
   Parla — design system
   A quiet, iOS-flavoured learning app. One column, soft surfaces, real type.
   ========================================================================== */

:root {
  --bg: #f2f2f7;
  --bg-2: #ffffff;
  --bg-3: #f7f7fa;
  --text: #111114;
  --text-2: #636366;
  --text-3: #6b6b70;
  --sep: rgba(60, 60, 67, 0.1);
  --fill: #e9e9eb;
  --fill-2: #f2f2f7;
  --blue: #0066cc;
  --green: #2fae5b;
  --green-soft: #e5f6ea;
  --red: #c1271c;
  --red-soft: #fdecea;
  --orange: #f08c00;
  --orange-soft: #fff3e0;
  --purple: #7d5cff;
  --purple-soft: #f0ecff;
  --pink: #e8457b;
  --pink-soft: #fdecf1;
  --teal: #0d8f8f;
  --teal-soft: #e5f6f6;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 10px 28px rgba(16, 24, 40, 0.055);
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --radius: 20px;
  --accent: #1d8a52;
  --accent-soft: #e7f5ec;
  --accent-ink: var(--accent);
  --accent-ink: color-mix(in srgb, var(--accent) 80%, #000);
  --accent-bg: var(--accent);
  --accent-bg: color-mix(in srgb, var(--accent) 86%, #000);
  --tabbar-bg: rgba(249, 249, 251, 0.84);
  --sheet-bg: #f7f7fa;
  --glass: rgba(255, 255, 255, 0.72);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #000000;
    --bg-2: #1c1c1e;
    --bg-3: #141416;
    --text: #f5f5f7;
    --text-2: #a1a1a6;
    --text-3: #8e8e93;
    --sep: rgba(84, 84, 88, 0.36);
    --fill: #2c2c2e;
    --fill-2: #1c1c1e;
    --blue: #0a84ff;
    --accent-ink: var(--accent);
    --accent-ink: color-mix(in srgb, var(--accent) 62%, #fff);
    --accent-bg: var(--accent);
    --accent-bg: color-mix(in srgb, var(--accent) 86%, #000);
    --green: #30d158;
    --green-soft: rgba(48, 209, 88, 0.16);
    --red: #ff6961;
    --red-soft: rgba(255, 69, 58, 0.16);
    --orange-soft: rgba(240, 140, 0, 0.16);
    --purple-soft: rgba(125, 92, 255, 0.16);
    --pink-soft: rgba(232, 69, 123, 0.16);
    --teal-soft: rgba(13, 143, 143, 0.16);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 14px 34px rgba(0, 0, 0, 0.32);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --tabbar-bg: rgba(18, 18, 20, 0.82);
    --sheet-bg: #1c1c1e;
    --glass: rgba(28, 28, 30, 0.7);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #000000;
  --bg-2: #1c1c1e;
  --bg-3: #141416;
  --text: #f5f5f7;
  --text-2: #a1a1a6;
  --text-3: #8e8e93;
  --sep: rgba(84, 84, 88, 0.36);
  --fill: #2c2c2e;
  --fill-2: #1c1c1e;
  --blue: #0a84ff;
  --accent-ink: var(--accent);
  --accent-ink: color-mix(in srgb, var(--accent) 62%, #fff);
  --accent-bg: var(--accent);
  --accent-bg: color-mix(in srgb, var(--accent) 86%, #000);
  --green: #30d158;
  --green-soft: rgba(48, 209, 88, 0.16);
  --red: #ff6961;
  --red-soft: rgba(255, 69, 58, 0.16);
  --orange-soft: rgba(240, 140, 0, 0.16);
  --purple-soft: rgba(125, 92, 255, 0.16);
  --pink-soft: rgba(232, 69, 123, 0.16);
  --teal-soft: rgba(13, 143, 143, 0.16);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 14px 34px rgba(0, 0, 0, 0.32);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --tabbar-bg: rgba(18, 18, 20, 0.82);
  --sheet-bg: #1c1c1e;
  --glass: rgba(28, 28, 30, 0.7);
  color-scheme: dark;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html {
  height: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #e8e9ee;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-color-scheme: dark) {
  body { background: #121216; }
}
:root[data-theme="dark"] body { background: #121216; }
:root[data-theme="light"] body { background: #e8e9ee; }

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(58vw 42vw at 12% 0%, rgba(29, 138, 82, 0.1), transparent 62%),
    radial-gradient(52vw 40vw at 92% 12%, rgba(10, 132, 255, 0.1), transparent 60%),
    radial-gradient(60vw 50vw at 50% 100%, rgba(125, 92, 255, 0.08), transparent 65%);
}

@media (prefers-color-scheme: dark) {
  body::before { opacity: 0.8; }
}
:root[data-theme="dark"] body::before { opacity: 0.55; }

button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--blue); }

:focus-visible {
  outline: 2.5px solid var(--blue);
  outline-offset: 2px;
  border-radius: 8px;
}

::selection { background: rgba(10, 132, 255, 0.2); }

/* ---------- shell ---------- */

#app {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 480px;
  min-height: 100dvh;
  margin: 0 auto;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  isolation: isolate;
}

@media (min-width: 560px) {
  #app {
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.04), 0 40px 100px rgba(20, 24, 40, 0.18);
  }
}

@media (min-width: 560px) and (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) #app {
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.07), 0 40px 100px rgba(0, 0, 0, 0.55);
  }
}

@media (min-width: 560px) {
  :root[data-theme="dark"] #app {
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06), 0 40px 100px rgba(0, 0, 0, 0.6);
  }
}

/* ---------- top bar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  height: 54px;
  padding: 0 16px;
  background: var(--tabbar-bg);
  -webkit-backdrop-filter: saturate(1.7) blur(22px);
  backdrop-filter: saturate(1.7) blur(22px);
  border-bottom: 0.5px solid var(--sep);
}

.brand {
  border: 0;
  background: none;
  padding: 4px 2px;
  font-size: 20px;
  font-weight: 750;
  letter-spacing: -0.7px;
  color: var(--text);
  display: flex;
  align-items: baseline;
  gap: 1px;
}
.brand:active { opacity: 0.55; }
.brand .dot { color: var(--accent-ink); font-size: 24px; line-height: 0; transition: color 0.25s ease; }

.lang-switch {
  display: flex;
  gap: 2px;
  padding: 3px;
  background: var(--fill);
  border-radius: 12px;
}
.lang-opt {
  display: flex;
  align-items: center;
  gap: 5px;
  border: 0;
  background: transparent;
  color: var(--text-2);
  font-size: 12.5px;
  font-weight: 620;
  padding: 5px 9px;
  border-radius: 9px;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}
.lang-opt .flag { font-size: 13px; line-height: 1; }
.lang-opt.active {
  background: var(--bg-2);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.13);
}
.lang-opt:active { opacity: 0.7; }

/* ---------- page & type ---------- */

.page {
  padding: 10px 16px 124px;
  animation: page-in 0.32s cubic-bezier(0.22, 0.8, 0.3, 1) both;
}
@keyframes page-in {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: translateY(0); }
}

.large-title { padding: 6px 4px 0; }
.large-title h1 {
  margin: 0;
  font-size: 33px;
  line-height: 1.08;
  font-weight: 760;
  letter-spacing: -0.9px;
}
.large-title p {
  margin: 7px 0 0;
  font-size: 15px;
  line-height: 1.4;
  color: var(--text-2);
  letter-spacing: -0.1px;
}

.section { margin-top: 26px; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 0 4px 10px;
}
.section-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.3px;
}
.section-link {
  border: 0;
  background: none;
  padding: 2px;
  font-size: 13px;
  font-weight: 620;
  color: var(--accent-ink);
}
.section-link:active { opacity: 0.55; }

.muted { color: var(--text-2); }
.small { font-size: 13px; }
.tiny { font-size: 11.5px; }
.center { text-align: center; }
.stack { display: flex; flex-direction: column; }

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

.hero {
  position: relative;
  margin-top: 18px;
  padding: 20px;
  border-radius: 26px;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(142deg, var(--g1) 0%, var(--g2) 56%, var(--g3) 120%);
  box-shadow: 0 20px 40px -22px var(--g2), 0 2px 6px rgba(0, 0, 0, 0.08);
  isolation: isolate;
}
.hero::before {
  content: "";
  position: absolute;
  width: 230px;
  height: 230px;
  right: -80px;
  top: -120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.28), transparent 68%);
  z-index: -1;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.35;
  background-image: radial-gradient(rgba(255, 255, 255, 0.32) 0.7px, transparent 0.7px);
  background-size: 14px 14px;
  -webkit-mask-image: linear-gradient(to bottom left, #000, transparent 58%);
  mask-image: linear-gradient(to bottom left, #000, transparent 58%);
}

.hero-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.hero-eyebrow {
  font-size: 10.5px;
  font-weight: 720;
  letter-spacing: 1.3px;
  text-transform: uppercase;
  opacity: 0.82;
}
.hero-title {
  margin: 7px 0 0;
  font-size: 26px;
  line-height: 1.15;
  font-weight: 740;
  letter-spacing: -0.6px;
}
.hero-meta {
  margin: 7px 0 0;
  font-size: 13.5px;
  line-height: 1.4;
  opacity: 0.86;
  letter-spacing: -0.05px;
}
.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  margin-top: 18px;
  padding: 13px 16px;
  border: 0;
  border-radius: 14px;
  background: #fff;
  color: #14170f;
  font-size: 15px;
  font-weight: 680;
  letter-spacing: -0.1px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
  transition: transform 0.16s ease, opacity 0.16s ease;
}
.hero-cta:active { transform: scale(0.977); opacity: 0.92; }
.hero-cta svg { width: 17px; height: 17px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  border: 0.5px solid rgba(255, 255, 255, 0.24);
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: 0.1px;
  backdrop-filter: blur(6px);
}

.ring { position: relative; flex: none; display: grid; place-items: center; }
.ring svg { transform: rotate(-90deg); display: block; }
.ring-track { stroke: rgba(255, 255, 255, 0.22); }
.ring-fill { stroke: #fff; stroke-linecap: round; transition: stroke-dashoffset 0.7s cubic-bezier(0.22, 0.8, 0.3, 1); }
.ring-label {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 720;
  letter-spacing: -0.2px;
}

/* ---------- cards ---------- */

.card {
  background: var(--bg-2);
  border: 0.5px solid var(--sep);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 17px;
}

.unit-scroll {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 3px 16px 8px;
  margin: 0 -16px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.unit-scroll::-webkit-scrollbar { display: none; }

.unit-card {
  flex: 0 0 156px;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  text-align: left;
  padding: 14px;
  border: 0.5px solid var(--sep);
  border-radius: 20px;
  background: var(--bg-2);
  box-shadow: var(--shadow);
  transition: transform 0.18s ease;
}
.unit-card:active { transform: scale(0.975); }
.unit-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  font-size: 21px;
  border-radius: 13px;
  background: var(--tint, var(--fill));
  line-height: 1;
}
.unit-card h3 {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.24;
  font-weight: 660;
  letter-spacing: -0.2px;
  min-height: 36px;
}
.unit-card .unit-meta { margin-top: 4px; font-size: 11.5px; color: var(--text-2); }
.progress-line {
  height: 4px;
  margin-top: 11px;
  border-radius: 99px;
  background: var(--fill);
  overflow: hidden;
}
.progress-line > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 0.5s cubic-bezier(0.22, 0.8, 0.3, 1);
}
.unit-card .unit-pct { margin-top: 6px; font-size: 10.5px; font-weight: 650; color: var(--text-3); }

/* ---------- practice grid ---------- */

.practice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.practice-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  padding: 15px;
  min-height: 124px;
  border: 0.5px solid var(--sep);
  border-radius: 20px;
  background: var(--bg-2);
  box-shadow: var(--shadow);
  transition: transform 0.18s ease;
}
.practice-tile:active { transform: scale(0.975); }
.tile-icon {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: var(--tile, var(--fill));
  color: var(--tile-ink, var(--blue));
}
.tile-icon svg { width: 19px; height: 19px; }
.practice-tile h3 {
  margin: 13px 0 0;
  font-size: 14.5px;
  font-weight: 660;
  letter-spacing: -0.2px;
}
.practice-tile p { margin: 3px 0 0; font-size: 11.5px; color: var(--text-2); line-height: 1.35; }

.vocab-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin-top: 12px;
  padding: 13px 14px;
  border: 0.5px solid var(--sep);
  border-radius: 18px;
  background: linear-gradient(130deg, var(--bg-2), var(--accent-soft));
  box-shadow: var(--shadow);
  text-align: left;
  transition: transform 0.16s ease;
}
.vocab-banner:active { transform: scale(0.985); }
.vocab-banner-icon {
  flex: none;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent-ink);
}
.vocab-banner-icon svg { width: 19px; height: 19px; }
.vocab-banner strong { display: block; font-size: 14.5px; font-weight: 660; letter-spacing: -0.2px; }
.vocab-banner small { display: block; margin-top: 2px; font-size: 11.5px; color: var(--text-2); }
.vocab-banner .row-meta { margin-left: auto; }

.tile-badge {
  position: absolute;
  top: 13px;
  right: 13px;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 99px;
  display: grid;
  place-items: center;
  font-size: 10.5px;
  font-weight: 720;
  color: #fff;
  background: var(--accent-bg);
}
.tile-badge.soft { background: var(--fill); color: var(--text-2); }

/* ---------- phrase of the day ---------- */

.pod .label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 10.5px;
  font-weight: 720;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-3);
}
.pod .label::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.pod-main { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; margin-top: 12px; }
.pod-target { margin: 0; font-size: 23px; font-weight: 720; letter-spacing: -0.5px; line-height: 1.22; }
.pod-phon { margin: 5px 0 0; font-size: 12.5px; color: var(--text-3); letter-spacing: 0.1px; }
.pod-en { margin: 9px 0 0; font-size: 14.5px; color: var(--text-2); line-height: 1.4; }
.pod-note {
  display: flex;
  gap: 8px;
  margin-top: 13px;
  padding-top: 13px;
  border-top: 0.5px solid var(--sep);
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--text-2);
}
.pod-note svg { flex: none; width: 15px; height: 15px; color: var(--orange); margin-top: 1px; }

.play-btn {
  flex: none;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-ink);
  transition: transform 0.15s ease, background 0.2s ease;
}
.play-btn svg { width: 19px; height: 19px; }
.play-btn:active { transform: scale(0.9); }
.play-btn.pulse { animation: pulse 0.55s ease; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(10, 132, 255, 0.3); }
  100% { box-shadow: 0 0 0 12px rgba(10, 132, 255, 0); }
}
.play-btn.sm { width: 34px; height: 34px; }
.play-btn.sm svg { width: 16px; height: 16px; }

/* ---------- iOS lists ---------- */

.list {
  background: var(--bg-2);
  border: 0.5px solid var(--sep);
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.row {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 14px;
  border: 0;
  background: transparent;
  text-align: left;
  transition: background 0.15s ease;
}
.row:active { background: var(--fill-2); }
.row + .row { border-top: 0.5px solid var(--sep); }
.row-icon {
  flex: none;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  font-size: 17px;
  background: var(--tint, var(--fill));
  line-height: 1;
}
.row-icon svg { width: 18px; height: 18px; color: var(--tile-ink, var(--text)); }
.row-body { flex: 1; min-width: 0; }
.row-title {
  display: block;
  font-size: 15px;
  font-weight: 590;
  letter-spacing: -0.15px;
  line-height: 1.3;
  color: var(--text);
}
.row-sub {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  line-height: 1.35;
  color: var(--text-2);
}
.row-meta { flex: none; font-size: 12.5px; color: var(--text-3); font-variant-numeric: tabular-nums; }
.chevron { flex: none; width: 15px; height: 15px; color: var(--text-3); opacity: 0.8; }

.list-head {
  padding: 4px 6px 7px;
  font-size: 11.5px;
  font-weight: 620;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 14px;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 660;
  letter-spacing: -0.1px;
  background: var(--fill);
  color: var(--text);
  transition: transform 0.15s ease, opacity 0.15s ease, background 0.2s ease;
}
.btn:active { transform: scale(0.977); opacity: 0.9; }
.btn svg { width: 17px; height: 17px; }
.btn-primary {
  width: 100%;
  background: var(--accent-bg);
  color: #fff;
  box-shadow: 0 8px 20px -12px var(--accent);
}
.btn-secondary { width: 100%; background: var(--fill); color: var(--text); }
.btn-quiet { background: transparent; color: var(--text-2); padding: 10px 12px; }
.btn-destructive { background: var(--red-soft); color: var(--red); }
.btn-sm { padding: 8px 12px; font-size: 13px; border-radius: 11px; }
.btn:disabled { opacity: 0.45; transform: none; cursor: default; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--fill);
  color: var(--text-2);
  font-size: 11.5px;
  font-weight: 620;
}
.chip svg { width: 12px; height: 12px; }

/* ---------- tab bar ---------- */

.tabbar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(100%, 480px);
  z-index: 50;
  display: flex;
  align-items: stretch;
  gap: 2px;
  padding: 7px 8px calc(7px + env(safe-area-inset-bottom));
  background: var(--tabbar-bg);
  -webkit-backdrop-filter: saturate(1.8) blur(26px);
  backdrop-filter: saturate(1.8) blur(26px);
  border-top: 0.5px solid var(--sep);
}
.tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 4px 2px 3px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--text-3);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.1px;
  transition: color 0.18s ease, background 0.18s ease;
}
.tab svg { width: 23px; height: 23px; }
.tab.active { color: var(--blue); }
.tab:active { background: var(--fill); }

/* ---------- toast & sheet ---------- */

.toast {
  position: fixed;
  z-index: 220;
  left: 50%;
  bottom: calc(78px + env(safe-area-inset-bottom));
  transform: translate(-50%, 14px);
  width: max-content;
  max-width: min(420px, calc(100vw - 40px));
  padding: 10px 15px;
  border-radius: 13px;
  background: rgba(28, 28, 30, 0.94);
  color: #fff;
  font-size: 12.5px;
  font-weight: 550;
  line-height: 1.35;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
  backdrop-filter: blur(12px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.sheet-backdrop {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(0, 0, 0, 0.34);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  animation: fade-in 0.2s ease both;
}
.sheet-wrap {
  position: fixed;
  z-index: 151;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: min(100%, 480px);
  padding: 0 8px;
  animation: sheet-up 0.3s cubic-bezier(0.22, 0.8, 0.3, 1) both;
}
.sheet {
  background: var(--sheet-bg);
  border-radius: 24px 24px 0 0;
  padding: 8px 14px calc(18px + env(safe-area-inset-bottom));
  max-height: 82dvh;
  overflow-y: auto;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.16);
}
.sheet-handle {
  width: 36px;
  height: 5px;
  margin: 2px auto 14px;
  border-radius: 99px;
  background: var(--fill);
}
.sheet h2 { margin: 0 6px 4px; font-size: 21px; font-weight: 720; letter-spacing: -0.4px; }
.sheet p.sheet-sub { margin: 0 6px 14px; font-size: 13px; color: var(--text-2); line-height: 1.4; }
.sheet .list { margin-bottom: 10px; }
.sheet-actions { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }

@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes sheet-up { from { transform: translate(-50%, 100%); } to { transform: translate(-50%, 0); } }

/* ---------- empty state ---------- */

.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 26px 18px;
  gap: 8px;
}
.empty .emoji {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border-radius: 19px;
  background: var(--accent-soft);
  font-size: 28px;
}
.empty h3 { margin: 4px 0 0; font-size: 17px; font-weight: 680; letter-spacing: -0.3px; }
.empty p { margin: 0; font-size: 13px; color: var(--text-2); line-height: 1.45; max-width: 280px; }

/* ---------- misc ---------- */

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Learn / unit detail
   ========================================================================== */

.course-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-2);
  border: 0.5px solid var(--sep);
  border-radius: 22px;
  padding: 17px;
  box-shadow: var(--shadow);
}
.course-card .ring-track { stroke: var(--fill); }
.course-card .ring-fill { stroke: var(--accent); }
.course-card .ring-label { font-size: 13px; color: var(--text); }
.course-body { flex: 1; min-width: 0; }
.course-body h2 { margin: 0; font-size: 18px; font-weight: 720; letter-spacing: -0.4px; }
.course-body p { margin: 4px 0 0; font-size: 12.5px; color: var(--text-2); line-height: 1.4; }

.backlink {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  margin: 2px 0 8px -6px;
  padding: 6px;
  border: 0;
  background: none;
  color: var(--accent-ink);
  font-size: 14.5px;
  font-weight: 610;
}
.backlink svg { width: 17px; height: 17px; }
.backlink:active { opacity: 0.55; }

.unit-head { display: flex; align-items: center; gap: 14px; padding: 0 4px; }
.unit-hero-icon {
  flex: none;
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  font-size: 29px;
  border-radius: 18px;
  background: var(--tint, var(--fill));
  line-height: 1;
}
.unit-head h1 { margin: 0; font-size: 27px; line-height: 1.12; font-weight: 750; letter-spacing: -0.7px; }
.unit-head .unit-local { margin: 4px 0 0; font-size: 13px; color: var(--text-3); }
.unit-blurb { margin: 14px 4px 0; font-size: 14.5px; line-height: 1.5; color: var(--text-2); }

.unit-title-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.level-chip {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--fill);
  color: var(--text-2);
  font-size: 10px;
  font-weight: 720;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}

.vocab-search {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 16px 0 2px;
  padding: 10px 12px;
  border-radius: 13px;
  background: var(--fill);
  color: var(--text-3);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}
.vocab-search svg { flex: none; width: 16px; height: 16px; }
.vocab-search input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  outline: none;
  font-size: 15px;
  color: var(--text);
}
.vocab-search input::placeholder { color: var(--text-3); }
.vocab-search:focus-within { background: var(--bg-2); box-shadow: 0 0 0 2px var(--accent-soft); }

.empty-state {
  padding: 20px 16px;
  text-align: center;
  background: var(--bg-2);
  border: 0.5px solid var(--sep);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.empty-state p { margin: 0 0 12px; font-size: 13.5px; line-height: 1.45; color: var(--text-2); }

.vocab-progress-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.vocab-progress-head strong { font-size: 14px; font-weight: 650; }
.vocab-progress-head span { font-size: 12px; color: var(--text-3); }

.unit-progress-card {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
  padding: 14px 16px;
  background: var(--bg-2);
  border: 0.5px solid var(--sep);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.unit-progress-card .ring-track { stroke: var(--fill); }
.unit-progress-card .ring-fill { stroke: var(--accent); }
.unit-progress-card .ring-label { color: var(--text); font-size: 12px; }
.unit-progress-body { flex: 1; }
.unit-progress-body strong { display: block; font-size: 14px; font-weight: 660; }
.unit-progress-body span { display: block; margin-top: 2px; font-size: 12px; color: var(--text-2); }

.phrase-list { overflow: hidden; }
.phrase-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 8px 9px 14px;
}
.phrase-row + .phrase-row { border-top: 0.5px solid var(--sep); }
.phrase-main {
  flex: 1;
  min-width: 0;
  padding: 4px 2px;
  border: 0;
  background: none;
  text-align: left;
}
.phrase-target { display: block; font-size: 15px; font-weight: 590; line-height: 1.35; letter-spacing: -0.1px; }
.phrase-en { display: block; margin-top: 2px; font-size: 12.5px; color: var(--text-2); line-height: 1.35; }
.phrase-say { display: block; margin-top: 2px; font-size: 11px; color: var(--text-3); }
.phrase-note {
  display: flex;
  gap: 7px;
  margin: 0 10px 10px 14px;
  padding: 10px 11px;
  border-radius: 11px;
  background: var(--bg-3);
  font-size: 12px;
  line-height: 1.45;
  color: var(--text-2);
  animation: fade-in 0.2s ease both;
}
.phrase-note svg { flex: none; width: 14px; height: 14px; color: var(--orange); margin-top: 1px; }
.learnt-dot { flex: none; width: 7px; height: 7px; border-radius: 50%; background: var(--green); }

.dialogue-card {
  display: flex;
  align-items: center;
  gap: 13px;
  width: 100%;
  text-align: left;
  padding: 14px;
  border: 0.5px solid var(--sep);
  border-radius: 18px;
  background: linear-gradient(130deg, var(--bg-2), var(--accent-soft));
  box-shadow: var(--shadow);
  transition: transform 0.16s ease;
}
.dialogue-card:active { transform: scale(0.98); }
.dialogue-card + .dialogue-card { margin-top: 10px; }
.dialogue-card .d-icon {
  flex: none;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  font-size: 21px;
  border-radius: 13px;
  background: var(--glass);
}
.dialogue-card h3 { margin: 0; font-size: 14.5px; font-weight: 660; letter-spacing: -0.2px; }
.dialogue-card p { margin: 3px 0 0; font-size: 11.5px; color: var(--text-2); line-height: 1.35; }
.dialogue-card .start-dot { flex: none; color: var(--accent-ink); width: 26px; height: 26px; display: grid; place-items: center; }
.dialogue-card .start-dot svg { width: 18px; height: 18px; }

/* ==========================================================================
   Practice / role-play picker
   ========================================================================== */

.coach {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-top: 18px;
  padding: 14px 15px;
  border-radius: 17px;
  background: var(--accent-soft);
  border: 0.5px solid transparent;
}
.coach svg { flex: none; width: 18px; height: 18px; margin-top: 1px; color: var(--accent-ink); }
.coach p { margin: 0; font-size: 12.5px; line-height: 1.45; color: var(--text); opacity: 0.85; }
.coach strong { font-weight: 680; }

.mode-meta-due { color: var(--accent-ink); font-weight: 680; }

/* ==========================================================================
   Progress
   ========================================================================== */

.stat-hero {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 18px;
  padding: 18px;
  border-radius: 22px;
  background: var(--bg-2);
  border: 0.5px solid var(--sep);
  box-shadow: var(--shadow);
}
.streak-flame {
  flex: none;
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: var(--orange-soft);
  color: var(--orange);
  font-size: 25px;
}
.stat-hero-body { flex: 1; }
.stat-hero-body strong { display: block; font-size: 22px; font-weight: 740; letter-spacing: -0.5px; }
.stat-hero-body span { display: block; margin-top: 2px; font-size: 12.5px; color: var(--text-2); }
.xp-pill {
  flex: none;
  padding: 6px 10px;
  border-radius: 99px;
  background: var(--fill);
  font-size: 11.5px;
  font-weight: 660;
  color: var(--text-2);
}

.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px; }
.stat-card {
  padding: 14px 15px;
  border-radius: 17px;
  background: var(--bg-2);
  border: 0.5px solid var(--sep);
  box-shadow: var(--shadow-sm);
}
.stat-card b { display: block; font-size: 24px; font-weight: 740; letter-spacing: -0.6px; line-height: 1.1; }
.stat-card span { display: block; margin-top: 3px; font-size: 10.5px; font-weight: 640; letter-spacing: 0.4px; text-transform: uppercase; color: var(--text-3); }

.week-chart {
  display: flex;
  align-items: flex-end;
  gap: 7px;
  height: 116px;
  padding: 4px 2px 0;
}
.bar-col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 7px; height: 100%; justify-content: flex-end; }
.bar-track { width: 100%; flex: 1; display: flex; align-items: flex-end; }
.bar {
  width: 100%;
  min-height: 4px;
  border-radius: 7px;
  background: var(--fill);
  transition: height 0.5s cubic-bezier(0.22, 0.8, 0.3, 1);
}
.bar.today { background: var(--accent); }
.bar-label { font-size: 10px; font-weight: 620; color: var(--text-3); }
.bar-col.today .bar-label { color: var(--accent-ink); }

.memory-bar { display: flex; gap: 2px; height: 10px; border-radius: 99px; overflow: hidden; background: var(--fill); }
.memory-bar span { display: block; height: 100%; transition: width 0.5s ease; }
.memory-legend { display: flex; flex-wrap: wrap; gap: 9px 14px; margin-top: 12px; }
.memory-legend span { display: inline-flex; align-items: center; gap: 5px; font-size: 11.5px; color: var(--text-2); }
.memory-legend i { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }

.up-row { display: flex; align-items: center; gap: 12px; padding: 12px 14px; }
.up-row + .up-row { border-top: 0.5px solid var(--sep); }
.up-body { flex: 1; min-width: 0; }
.up-body strong { display: block; font-size: 13.5px; font-weight: 600; }
.up-body .progress-line { margin-top: 7px; }
.up-pct { flex: none; font-size: 11.5px; font-weight: 640; color: var(--text-3); font-variant-numeric: tabular-nums; }

/* ==========================================================================
   Settings
   ========================================================================== */

.settings-label {
  padding: 2px 6px 7px;
  font-size: 11.5px;
  font-weight: 620;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  color: var(--text-3);
}
.setting-row { display: flex; align-items: center; gap: 12px; padding: 13px 15px; }
.setting-row + .setting-row { border-top: 0.5px solid var(--sep); }
.setting-row .row-body strong { display: block; font-size: 14.5px; font-weight: 550; letter-spacing: -0.1px; }
.setting-row .row-body small { display: block; margin-top: 2px; font-size: 11.5px; color: var(--text-2); line-height: 1.35; }

.switch {
  position: relative;
  flex: none;
  width: 47px;
  height: 28px;
  padding: 0;
  border: 0;
  border-radius: 99px;
  background: var(--fill);
  transition: background 0.22s ease;
}
.switch::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.22);
  transition: transform 0.22s cubic-bezier(0.22, 0.8, 0.3, 1);
}
.switch.on { background: var(--green); }
.switch.on::after { transform: translateX(19px); }

.segmented { display: flex; gap: 2px; padding: 3px; border-radius: 11px; background: var(--fill); }
.seg-btn {
  flex: 1;
  padding: 6px 8px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-2);
  font-size: 12px;
  font-weight: 620;
  white-space: nowrap;
  transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}
.seg-btn.active { background: var(--bg-2); color: var(--text); box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12); }
.setting-block { padding: 12px 15px 14px; }
.setting-block + .setting-block { border-top: 0.5px solid var(--sep); }
.setting-block-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 9px; }
.setting-block-head strong { font-size: 14.5px; font-weight: 550; }
.setting-block-head span { font-size: 11.5px; color: var(--text-2); }

.about-card { padding: 17px; }
.about-card h2 { margin: 0 0 6px; font-size: 16px; font-weight: 700; letter-spacing: -0.25px; }
.about-card p { margin: 0; font-size: 12.5px; line-height: 1.55; color: var(--text-2); }
.method-list { margin: 14px 0 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 12px; }
.method-list li { display: flex; gap: 10px; }
.method-list .num {
  flex: none;
  width: 21px;
  height: 21px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 10.5px;
  font-weight: 720;
}
.method-list b { display: block; font-size: 12.5px; font-weight: 660; }
.method-list span { display: block; margin-top: 1px; font-size: 11.5px; line-height: 1.4; color: var(--text-2); }

.app-foot { margin: 26px 4px 0; text-align: center; font-size: 11px; line-height: 1.5; color: var(--text-3); }

/* ==========================================================================
   Session (full screen)
   ========================================================================== */

.session {
  position: fixed;
  inset: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(100%, 480px);
  height: 100dvh;
  z-index: 120;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}
.session.first-run {
  animation: session-in 0.28s cubic-bezier(0.22, 0.8, 0.3, 1) both;
}
@keyframes session-in {
  from { opacity: 0; transform: translate(-50%, 12px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}
@media (min-width: 560px) {
  .session { box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.06), 0 40px 100px rgba(0, 0, 0, 0.28); }
}

.session-top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: calc(12px + env(safe-area-inset-top)) 16px 10px;
}
.session-close {
  flex: none;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: var(--fill);
  color: var(--text-2);
}
.session-close svg { width: 17px; height: 17px; }
.session-close:active { opacity: 0.6; }
.session-track {
  flex: 1;
  height: 5px;
  border-radius: 99px;
  background: var(--fill);
  overflow: hidden;
}
.session-track > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 0.45s cubic-bezier(0.22, 0.8, 0.3, 1);
}
.session-count {
  flex: none;
  min-width: 34px;
  text-align: right;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}

.session-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 4px 20px 16px;
  display: flex;
  flex-direction: column;
  -webkit-overflow-scrolling: touch;
}
.session-body.no-scroll { overflow: hidden; }
.session-foot {
  padding: 10px 20px calc(14px + env(safe-area-inset-bottom));
  background: var(--bg);
  border-top: 0.5px solid transparent;
}
.session-foot .btn-primary { padding: 15px 18px; font-size: 15.5px; }

.step-kicker {
  margin: 10px 0 0;
  text-align: center;
  font-size: 10.5px;
  font-weight: 720;
  letter-spacing: 1.3px;
  text-transform: uppercase;
  color: var(--text-3);
}
.step-kicker em { font-style: normal; color: var(--accent-ink); }

/* learn step */

.learn-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 18px 0 10px;
}
.big-play {
  width: 78px;
  height: 78px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-ink);
  box-shadow: 0 0 0 9px color-mix(in srgb, var(--accent-soft) 55%, transparent);
  transition: transform 0.16s ease;
}
.big-play svg { width: 31px; height: 31px; }
.big-play:active { transform: scale(0.92); }
.big-play.pulse { animation: pulse 0.55s ease; }

.target-xl {
  margin: 26px 0 0;
  font-size: 33px;
  line-height: 1.15;
  font-weight: 760;
  letter-spacing: -0.9px;
  max-width: 330px;
  text-wrap: balance;
}
.phon-lg { margin: 10px 0 0; font-size: 13.5px; color: var(--text-3); letter-spacing: 0.1px; }
.en-lg { margin: 20px 0 0; font-size: 17px; font-weight: 500; color: var(--text-2); line-height: 1.4; max-width: 320px; }
.note-box {
  display: flex;
  gap: 8px;
  margin-top: 24px;
  padding: 12px 13px;
  border-radius: 14px;
  background: var(--bg-2);
  border: 0.5px solid var(--sep);
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--text-2);
  text-align: left;
  max-width: 360px;
}
.note-box svg { flex: none; width: 15px; height: 15px; margin-top: 1px; color: var(--orange); }
.slow-link {
  margin-top: 16px;
  padding: 6px 10px;
  border: 0;
  background: none;
  color: var(--text-3);
  font-size: 12px;
  font-weight: 560;
}

/* quiz + typing */

.quiz-head { text-align: center; padding-top: 8px; }
.quiz-question { margin: 6px 0 0; font-size: 22px; font-weight: 720; letter-spacing: -0.45px; line-height: 1.25; }
.quiz-sub { margin: 6px 0 0; font-size: 12.5px; color: var(--text-2); line-height: 1.4; }
.listen-orb {
  width: 94px;
  height: 94px;
  margin: 22px auto 0;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-ink);
  box-shadow: 0 0 0 10px color-mix(in srgb, var(--accent-soft) 48%, transparent);
  transition: transform 0.16s ease;
}
.listen-orb svg { width: 38px; height: 38px; }
.listen-orb:active { transform: scale(0.93); }
.listen-orb.pulse { animation: pulse 0.55s ease; }
.listen-hint { margin: 18px 0 0; text-align: center; font-size: 11.5px; color: var(--text-3); }

.options { display: flex; flex-direction: column; gap: 9px; margin-top: 24px; }
.option {
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--sep);
  border-radius: 14px;
  background: var(--bg-2);
  text-align: left;
  font-size: 14.5px;
  line-height: 1.35;
  font-weight: 520;
  color: var(--text);
  transition: transform 0.15s ease, background 0.18s ease, border-color 0.18s ease;
}
.option:active { transform: scale(0.987); }
.option:disabled { cursor: default; }
.option .key {
  flex: none;
  width: 23px;
  height: 23px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--fill);
  color: var(--text-3);
  font-size: 10.5px;
  font-weight: 700;
}
.option.correct { background: var(--green-soft); border-color: color-mix(in srgb, var(--green) 45%, transparent); color: var(--green); font-weight: 590; }
.option.correct .key { background: var(--green); color: #fff; }
.option.wrong { background: var(--red-soft); border-color: color-mix(in srgb, var(--red) 40%, transparent); color: var(--red); }
.option.wrong .key { background: var(--red); color: #fff; }
.option.dim { opacity: 0.5; }

.feedback {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  min-height: 22px;
  margin-top: 14px;
  font-size: 13px;
  font-weight: 540;
  line-height: 1.4;
}
.feedback svg { flex: none; width: 16px; height: 16px; margin-top: 1px; }
.feedback.good { color: var(--green); }
.feedback.bad { color: var(--red); }

/* typing step */

.prompt-en {
  margin: 16px 0 0;
  text-align: center;
  font-size: 23px;
  line-height: 1.25;
  font-weight: 710;
  letter-spacing: -0.5px;
}
.prompt-sub { margin: 7px 0 0; text-align: center; font-size: 12px; color: var(--text-3); }
.type-input {
  width: 100%;
  margin-top: 22px;
  padding: 15px 16px;
  border: 1.5px solid var(--sep);
  border-radius: 15px;
  background: var(--bg-2);
  color: var(--text);
  font-size: 17px;
  text-align: center;
  letter-spacing: -0.1px;
  outline: none;
  transition: border-color 0.18s ease;
}
.type-input::placeholder { color: var(--text-3); font-size: 15px; }
.type-input:focus { border-color: var(--accent-ink); }
.type-input.good { border-color: var(--green); background: var(--green-soft); }
.type-input.bad { border-color: var(--red); background: var(--red-soft); }
.type-input:disabled { opacity: 0.85; }
.type-tools { display: flex; justify-content: center; gap: 6px; margin-top: 10px; }
.type-tools button {
  padding: 7px 10px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--accent-ink);
  font-size: 12px;
  font-weight: 620;
}
.type-tools button:active { background: var(--accent-soft); }
.word-bank {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 7px;
  margin-top: 13px;
  animation: fade-in 0.18s ease both;
}
.word-chip {
  padding: 8px 11px;
  border: 1px solid var(--sep);
  border-radius: 10px;
  background: var(--bg-2);
  font-size: 14px;
  font-weight: 520;
  box-shadow: var(--shadow-sm);
  transition: transform 0.13s ease;
}
.word-chip:active { transform: scale(0.94); background: var(--fill); }
.answer-reveal {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin-top: 16px;
  padding: 11px 13px;
  border-radius: 12px;
  background: var(--green-soft);
  color: var(--green);
  font-size: 14px;
  font-weight: 590;
  line-height: 1.4;
  animation: fade-in 0.18s ease both;
}
.answer-reveal.bad { background: var(--red-soft); color: var(--red); }
.answer-reveal svg { flex: none; width: 16px; height: 16px; margin-top: 1px; }
.answer-reveal small { display: block; font-size: 11.5px; font-weight: 500; opacity: 0.85; margin-top: 2px; }

/* speaking step */

.speak-stage { flex: 1; display: flex; flex-direction: column; align-items: center; text-align: center; padding-top: 6px; }
.speak-target { margin: 18px 0 0; font-size: 27px; font-weight: 740; letter-spacing: -0.7px; line-height: 1.2; text-wrap: balance; }
.speak-en { margin: 8px 0 0; font-size: 14px; color: var(--text-2); }
.speak-phon { margin: 6px 0 0; font-size: 12.5px; color: var(--text-3); }
.mic-btn {
  width: 86px;
  height: 86px;
  margin: 28px auto 0;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: var(--accent-bg);
  color: #fff;
  box-shadow: 0 16px 34px -16px var(--accent);
  transition: transform 0.16s ease;
}
.mic-btn svg { width: 32px; height: 32px; }
.mic-btn:active { transform: scale(0.94); }
.mic-btn.listening { animation: mic-pulse 1.25s ease-in-out infinite; }
@keyframes mic-pulse {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 40%, transparent); }
  50% { box-shadow: 0 0 0 14px color-mix(in srgb, var(--accent) 0%, transparent); }
}
.mic-note { margin: 14px 0 0; font-size: 11.5px; color: var(--text-3); line-height: 1.4; max-width: 270px; }
.transcript {
  margin-top: 16px;
  padding: 10px 13px;
  border-radius: 11px;
  background: var(--bg-2);
  border: 0.5px solid var(--sep);
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--text);
  max-width: 340px;
}
.transcript b { color: var(--accent-ink); font-weight: 660; }
.self-check { display: flex; gap: 8px; margin-top: 20px; width: 100%; max-width: 340px; }
.self-check .btn { flex: 1; padding: 11px 8px; font-size: 13px; }

/* role-play */

.dialog-wrap { display: flex; flex-direction: column; flex: 1; padding-top: 2px; }
.dialog-place {
  margin: 2px 0 14px;
  text-align: center;
  font-size: 11.5px;
  color: var(--text-3);
  letter-spacing: 0.1px;
}
.chat { display: flex; flex-direction: column; gap: 10px; }
.bubble-row { display: flex; align-items: flex-end; gap: 7px; max-width: 90%; animation: bubble-in 0.24s ease both; }
@keyframes bubble-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
.bubble-row.you { align-self: flex-end; flex-direction: row-reverse; }
.avatar {
  flex: none;
  width: 25px;
  height: 25px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 11px;
  font-weight: 720;
}
.bubble {
  padding: 10px 13px;
  border-radius: 17px;
  background: var(--bg-2);
  border: 0.5px solid var(--sep);
  font-size: 14px;
  line-height: 1.4;
  letter-spacing: -0.1px;
}
.bubble-row.you .bubble { background: var(--accent-bg); color: #fff; border-color: transparent; }
.bubble .bubble-en { display: block; margin-top: 3px; font-size: 11px; line-height: 1.35; color: var(--text-3); }
.bubble-row.you .bubble-en { color: rgba(255, 255, 255, 0.75); }
.bubble-play {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  margin-top: 5px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--accent-ink);
  font-size: 10.5px;
  font-weight: 600;
}
.bubble-play svg { width: 11px; height: 11px; }

.turn-block { margin-top: 18px; animation: bubble-in 0.24s ease both; }
.turn-kicker {
  margin: 0 0 8px;
  font-size: 10.5px;
  font-weight: 720;
  letter-spacing: 1.1px;
  text-transform: uppercase;
  color: var(--accent-ink);
}
.turn-prompt { margin: 0 0 11px; font-size: 13px; color: var(--text-2); line-height: 1.4; }
.choices { display: flex; flex-direction: column; gap: 8px; }
.choice {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--sep);
  border-radius: 13px;
  background: var(--bg-2);
  text-align: left;
  font-size: 14px;
  line-height: 1.35;
  transition: transform 0.14s ease, background 0.18s ease, border-color 0.18s ease;
}
.choice:active { transform: scale(0.986); }
.choice:disabled { cursor: default; }
.choice .choice-en { display: block; margin-top: 3px; font-size: 11px; color: var(--text-3); }
.choice.correct { background: var(--green-soft); border-color: color-mix(in srgb, var(--green) 45%, transparent); }
.choice.wrong { background: var(--red-soft); border-color: color-mix(in srgb, var(--red) 40%, transparent); }
.choice.dim { opacity: 0.45; }

/* summary */

.summary-wrap { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 14px 0 8px; }
.summary-badge {
  width: 96px;
  height: 96px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-ink);
  margin-bottom: 20px;
  animation: pop 0.5s cubic-bezier(0.2, 1.4, 0.4, 1) both;
}
@keyframes pop { from { transform: scale(0.5); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.summary-badge svg { width: 44px; height: 44px; }
.summary-title { margin: 0; font-size: 27px; font-weight: 760; letter-spacing: -0.7px; }
.summary-sub { margin: 7px 0 0; font-size: 13.5px; line-height: 1.45; color: var(--text-2); max-width: 300px; }
.summary-stats { display: flex; gap: 9px; justify-content: center; margin-top: 26px; }
.summary-stat {
  min-width: 82px;
  padding: 11px 12px;
  border-radius: 15px;
  background: var(--bg-2);
  border: 0.5px solid var(--sep);
  box-shadow: var(--shadow-sm);
}
.summary-stat b { display: block; font-size: 20px; font-weight: 740; letter-spacing: -0.4px; }
.summary-stat span { display: block; margin-top: 2px; font-size: 9.5px; font-weight: 650; letter-spacing: 0.5px; text-transform: uppercase; color: var(--text-3); }
.summary-note { margin-top: 22px; font-size: 11.5px; color: var(--text-3); line-height: 1.5; max-width: 290px; }

/* mobile tweaks */

@media (max-width: 380px) {
  .large-title h1 { font-size: 30px; }
  .target-xl { font-size: 29px; }
  .hero-title { font-size: 23px; }
  .lang-opt { padding: 5px 7px; gap: 4px; font-size: 11.5px; }
  .brand { font-size: 18px; }
  .practice-tile { min-height: 118px; padding: 13px; }
  .session-body { padding-left: 16px; padding-right: 16px; }
}

@media (min-width: 900px) {
  .session { top: 0; bottom: 0; }
}

/* ==========================================================================
   Final interaction details
   ========================================================================== */

.progress-line { display: block; }
.up-row {
  border: 0;
  background: transparent;
  width: 100%;
  text-align: left;
  transition: background 0.15s ease;
}
.up-row:active { background: var(--fill-2); }

body.session-open { overflow: hidden; overscroll-behavior: none; }
body.sheet-open { overflow: hidden; }

.grade-row { display: flex; gap: 8px; }
.grade-row .btn { flex: 1; padding: 13px 8px; font-size: 13.5px; border-radius: 13px; }
.grade-again { background: var(--red-soft); color: var(--red); }
.grade-good { background: var(--accent-bg); color: #fff; box-shadow: 0 8px 20px -12px var(--accent); }
.grade-easy { background: var(--green-soft); color: var(--green); }

.session-body--quiz { padding-bottom: 22px; }
.step-center { width: 100%; margin-top: auto; margin-bottom: auto; }

.hero-badge + .hero-badge { margin-left: 6px; }

/* Native-feeling scroll + tap targets on touch devices */
@media (hover: none) {
  .row:active { background: var(--fill-2); }
  .option:active, .choice:active, .word-chip:active { background: var(--fill); }
}

@media (max-width: 340px) {
  .lang-opt span:not(.flag) { display: none; }
  .lang-opt { padding: 6px 9px; }
}