/* ═══════════════════════════════════════════════════════════
   ช้างน้อย — Chang Noi · cute pastel English-learning app
   ═══════════════════════════════════════════════════════════ */

:root {
  --cream: #fff7ee;
  --paper: #fffdf9;
  --ink: #5c4a45;
  --ink-soft: #a18a84;
  --pink: #ffafc5;
  --pink-deep: #f87da0;
  --pink-dark: #e4638a;
  --pink-soft: #ffe4ed;
  --mint: #a8e6c9;
  --mint-deep: #58c795;
  --mint-dark: #3fae7d;
  --mint-soft: #e2f8ed;
  --blue: #aed9ff;
  --blue-deep: #6fb5f0;
  --blue-soft: #e6f3ff;
  --butter: #ffe29a;
  --butter-deep: #f0bd45;
  --butter-soft: #fff3d4;
  --lav: #d9cbff;
  --lav-soft: #f0eaff;
  --red-soft: #ffd4d4;
  --red-deep: #ef8989;
  --radius: 22px;
  --shadow-card: 0 6px 20px rgba(160, 120, 100, 0.12);
  --font-thai: 'Mali', 'Baloo 2', sans-serif;
  --font-en: 'Baloo 2', 'Mali', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html { font-size: 16px; }

body {
  font-family: var(--font-thai);
  background: var(--cream);
  color: var(--ink);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
}

/* ── dotted paper background ─────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(rgba(248, 125, 160, 0.10) 1.6px, transparent 1.6px);
  background-size: 26px 26px;
  pointer-events: none;
  z-index: 0;
}

.bg-deco { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.blob { position: absolute; border-radius: 50%; filter: blur(60px); opacity: 0.5; }
.blob-1 { width: 320px; height: 320px; background: var(--pink-soft); top: -80px; right: -100px; animation: drift 16s ease-in-out infinite; }
.blob-2 { width: 280px; height: 280px; background: var(--mint-soft); bottom: 10%; left: -120px; animation: drift 20s ease-in-out infinite reverse; }
.blob-3 { width: 240px; height: 240px; background: var(--butter-soft); top: 40%; right: -80px; animation: drift 24s ease-in-out infinite; }

@keyframes drift { 0%, 100% { transform: translate(0, 0) scale(1); } 50% { transform: translate(24px, -18px) scale(1.08); } }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

/* ── layout ──────────────────────────────────────────────── */
#app {
  position: relative;
  z-index: 1;
  max-width: 540px;
  margin: 0 auto;
  padding: 18px 18px calc(40px + env(safe-area-inset-bottom));
  min-height: 100dvh;
}

.screen { animation: screen-in 0.4s cubic-bezier(0.22, 1.2, 0.36, 1) both; }
@keyframes screen-in { from { opacity: 0; transform: translateY(14px) scale(0.99); } to { opacity: 1; transform: none; } }

/* ── typography helpers ──────────────────────────────────── */
.th-line { display: block; }
.en-line { display: block; font-family: var(--font-en); color: var(--ink-soft); font-size: 0.86em; font-weight: 600; }

/* ── buttons: chunky & squishy ───────────────────────────── */
.btn {
  font-family: var(--font-thai);
  font-weight: 600;
  font-size: 1.05rem;
  color: #fff;
  background: var(--pink-deep);
  border: none;
  border-radius: 18px;
  padding: 13px 26px;
  cursor: pointer;
  box-shadow: 0 5px 0 var(--pink-dark);
  transition: transform 0.08s ease, box-shadow 0.08s ease, filter 0.15s;
  text-align: center;
  line-height: 1.3;
}
.btn:active { transform: translateY(4px); box-shadow: 0 1px 0 var(--pink-dark); }
.btn .en-line { color: rgba(255, 255, 255, 0.85); }
.btn-mint { background: var(--mint-deep); box-shadow: 0 5px 0 var(--mint-dark); }
.btn-mint:active { box-shadow: 0 1px 0 var(--mint-dark); }
.btn-blue { background: var(--blue-deep); box-shadow: 0 5px 0 #4f96d4; }
.btn-blue:active { box-shadow: 0 1px 0 #4f96d4; }
.btn-ghost {
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 5px 0 #eaddd0, inset 0 0 0 2px #f3e7da;
}
.btn-ghost:active { box-shadow: 0 1px 0 #eaddd0, inset 0 0 0 2px #f3e7da; }
.btn-ghost .en-line { color: var(--ink-soft); }
.btn-big { width: 100%; font-size: 1.2rem; padding: 16px 26px; border-radius: 22px; }
.btn:disabled { filter: grayscale(0.6) opacity(0.6); cursor: default; }

.icon-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--paper);
  box-shadow: 0 3px 0 #eaddd0, inset 0 0 0 2px #f3e7da;
  font-size: 1.15rem;
  cursor: pointer;
  display: grid; place-items: center;
  transition: transform 0.08s;
  color: var(--ink);
}
.icon-btn:active { transform: translateY(3px); box-shadow: 0 0 0 #eaddd0, inset 0 0 0 2px #f3e7da; }
.icon-btn.back-btn { font-weight: 800; font-size: 1.3rem; flex-shrink: 0; }

/* ── top bar ─────────────────────────────────────────────── */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin-bottom: 16px;
}
.topbar .brand {
  font-weight: 700; font-size: 1.3rem;
  display: flex; align-items: center; gap: 8px;
}
.topbar .brand .logo-emoji { font-size: 1.6rem; display: inline-block; animation: floaty 4s ease-in-out infinite; }

.stat-chips { display: flex; gap: 8px; align-items: center; }
.chip {
  background: var(--paper);
  border-radius: 999px;
  padding: 7px 13px;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: var(--shadow-card);
  display: flex; align-items: center; gap: 6px;
  border: 2px solid #f6ebdf;
}
.chip .chip-sub { font-size: 0.7rem; color: var(--ink-soft); font-weight: 600; }
.chip.chip-fire.lit { border-color: var(--butter); background: var(--butter-soft); }
.chip.chip-score { border-color: var(--mint); background: var(--mint-soft); color: var(--mint-dark); }

/* ── mascot card ─────────────────────────────────────────── */
.mascot-card {
  background: linear-gradient(135deg, var(--pink-soft) 0%, var(--butter-soft) 55%, var(--mint-soft) 100%);
  border-radius: 28px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-card);
  border: 2.5px solid #fff;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}
.mascot-card .mascot-holder { flex-shrink: 0; cursor: pointer; transform-origin: 50% 100%; }
.mascot-card .mascot-holder.poked { animation: poke-squish 1s cubic-bezier(0.34, 1.56, 0.64, 1); }
@keyframes poke-squish {
  0% { transform: scale(1); }
  15% { transform: scaleX(1.18) scaleY(0.78); }
  40% { transform: scaleX(0.9) scaleY(1.14) translateY(-10px); }
  62% { transform: scaleX(1.06) scaleY(0.94); }
  80% { transform: scaleX(0.98) scaleY(1.03); }
  100% { transform: scale(1); }
}
.speech-bubble {
  background: #fff;
  border-radius: 18px;
  padding: 12px 16px;
  position: relative;
  font-weight: 600;
  font-size: 1.02rem;
  box-shadow: 0 3px 10px rgba(160, 120, 100, 0.1);
  flex: 1;
}
.speech-bubble::before {
  content: '';
  position: absolute;
  left: -8px; top: 50%;
  width: 16px; height: 16px;
  background: #fff;
  transform: translateY(-50%) rotate(45deg);
  border-radius: 4px;
}
.speech-bubble .en-line { margin-top: 3px; }

/* ── mascot svg animations ───────────────────────────────── */
/* every mood idles: breathe (normal/sleep), bob (happy), hop (cheer/party),
   sway (oops), tremble (surprised) — plus the leaf always sways */
.mascot { display: block; transform-origin: 50% 92%; }
.mascot .m-leaf { transform-origin: 106px 24px; animation: leaf-sway 4.5s ease-in-out infinite; }
@keyframes leaf-sway { 0%, 100% { transform: rotate(0); } 30% { transform: rotate(-9deg); } 65% { transform: rotate(6deg); } }
.mascot.mood-cheer { animation: hop 0.7s ease-in-out infinite; }
.mascot.mood-party { animation: hop 0.55s ease-in-out infinite; }
@keyframes hop { 0%, 100% { transform: translateY(0); } 40% { transform: translateY(-10px) rotate(-2deg); } 60% { transform: translateY(-10px) rotate(2deg); } }
.mascot.mood-oops { animation: sway 2.2s ease-in-out infinite; }
@keyframes sway { 0%, 100% { transform: rotate(-1.5deg); } 50% { transform: rotate(1.5deg); } }
.mascot.mood-normal { animation: breathe 3.4s ease-in-out infinite; }
.mascot.mood-sleep { animation: breathe 4.8s ease-in-out infinite; }
@keyframes breathe { 0%, 100% { transform: scale(1, 1); } 50% { transform: scale(1.02, 0.97); } }
.mascot.mood-happy { animation: bob 2.2s ease-in-out infinite; }
@keyframes bob { 0%, 100% { transform: translateY(0) rotate(0); } 30% { transform: translateY(-4px) rotate(-1.5deg); } 60% { transform: translateY(0) rotate(1.2deg); } }
.mascot.mood-surprised { animation: tremble 0.4s ease-in-out infinite; }
@keyframes tremble { 0%, 100% { transform: rotate(-2deg); } 50% { transform: rotate(2deg); } }
.mascot .m-zzz { animation: zzz-float 2.4s ease-in-out infinite; opacity: 0; }
.mascot .m-zzz.z2 { animation-delay: 0.8s; }
.mascot .m-zzz.z3 { animation-delay: 1.6s; }
@keyframes zzz-float {
  0% { opacity: 0; transform: translate(0, 0); }
  25% { opacity: 1; }
  100% { opacity: 0; transform: translate(14px, -22px); }
}

/* ── section headers ─────────────────────────────────────── */
.level-head {
  display: flex; align-items: center; gap: 12px;
  margin: 26px 0 12px;
}
.level-badge {
  width: 46px; height: 46px; flex-shrink: 0;
  border-radius: 16px;
  display: grid; place-items: center;
  font-family: var(--font-en);
  font-weight: 800; font-size: 1.25rem; color: #fff;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.12);
}
.level-1 .level-badge { background: var(--pink-deep); }
.level-2 .level-badge { background: var(--blue-deep); }
.level-3 .level-badge { background: var(--lav); }
.level-head h2 { font-size: 1.15rem; line-height: 1.25; }
.level-head .lvl-progress { margin-left: auto; font-weight: 700; color: var(--ink-soft); font-size: 0.9rem; white-space: nowrap; }

.level-locked-note {
  background: var(--lav-soft);
  border: 2px dashed var(--lav);
  border-radius: var(--radius);
  padding: 16px 18px;
  font-weight: 600;
  display: flex; gap: 12px; align-items: center;
  margin-bottom: 10px;
}
.level-locked-note .big-ico { font-size: 1.8rem; }

/* ── pack grid ───────────────────────────────────────────── */
.pack-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.pack-card {
  background: var(--paper);
  border: 2.5px solid #f6ebdf;
  border-radius: var(--radius);
  padding: 14px 12px 12px;
  cursor: pointer;
  box-shadow: 0 4px 0 #f0e2d3;
  transition: transform 0.1s, box-shadow 0.1s;
  text-align: center;
  position: relative;
  user-select: none;
}
.pack-card:active { transform: translateY(3px); box-shadow: 0 1px 0 #f0e2d3; }
.pack-card .pack-ico {
  font-size: 2.3rem;
  display: block;
  margin-bottom: 4px;
  filter: drop-shadow(0 3px 4px rgba(160, 120, 100, 0.25));
}
.pack-card .pack-th { font-weight: 700; font-size: 1rem; line-height: 1.3; }
.pack-card .pack-en { font-family: var(--font-en); font-weight: 600; font-size: 0.82rem; color: var(--ink-soft); }
.pack-card .pack-count {
  font-size: 0.75rem; font-weight: 700; color: var(--ink-soft);
  background: var(--mint-soft);
  border-radius: 999px;
  display: inline-block;
  padding: 2px 10px;
  margin-top: 6px;
}.pack-card.done { border-color: var(--butter); background: linear-gradient(160deg, #fffdf9, var(--butter-soft)); }
.pack-card.locked { filter: grayscale(0.85); opacity: 0.6; cursor: default; }
.pack-card.locked:active { transform: none; box-shadow: 0 4px 0 #f0e2d3; }
.pack-card .lock-corner { position: absolute; top: 8px; right: 10px; font-size: 0.95rem; }

/* ── welcome screen ──────────────────────────────────────── */
.welcome-wrap {
  min-height: calc(100dvh - 80px);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  gap: 18px;
}
.welcome-wrap .app-title { font-size: 2.1rem; font-weight: 700; line-height: 1.2; }
.welcome-wrap .app-title .en-line { font-size: 0.55em; }
.welcome-card {
  background: var(--paper);
  border-radius: 28px;
  border: 2.5px solid #f6ebdf;
  box-shadow: var(--shadow-card);
  padding: 24px;
  width: 100%;
  display: flex; flex-direction: column; gap: 14px;
  align-items: center;
}
.welcome-card .hello-q { font-weight: 700; font-size: 1.15rem; }
.name-input {
  font-family: var(--font-thai);
  font-size: 1.15rem;
  font-weight: 600;
  text-align: center;
  color: var(--ink);
  border: 2.5px solid var(--pink);
  border-radius: 16px;
  background: var(--pink-soft);
  padding: 12px 16px;
  width: 100%;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
}
.name-input:focus { border-color: var(--pink-deep); background: #fff; }
.name-input::placeholder { color: #d9a8b8; font-weight: 500; }

/* ── profile picker ──────────────────────────────────────── */
.profile-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  width: 100%;
}
.profile-card {
  font-family: var(--font-thai);
  background: var(--paper);
  border: 2.5px solid #f6ebdf;
  border-radius: var(--radius);
  box-shadow: 0 4px 0 #f0e2d3;
  padding: 18px 12px 14px;
  cursor: pointer;
  text-align: center;
  transition: transform 0.1s, box-shadow 0.1s;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.profile-card:active { transform: translateY(3px); box-shadow: 0 1px 0 #f0e2d3; }
.profile-card .p-avatar { font-size: 2.2rem; filter: drop-shadow(0 3px 4px rgba(160, 120, 100, 0.25)); }
.profile-card .p-name { font-weight: 700; font-size: 1.1rem; color: var(--ink); }
.profile-card.new-profile { border-style: dashed; background: var(--mint-soft); border-color: var(--mint); }

.avatar-grid { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.avatar-btn {
  width: 48px; height: 48px;
  font-size: 1.5rem;
  border-radius: 14px;
  border: 2.5px solid #f0e2d3;
  background: var(--paper);
  cursor: pointer;
  transition: transform 0.1s, border-color 0.15s, background 0.15s;
  display: grid; place-items: center;
}
.avatar-btn:active { transform: scale(0.9); }
.avatar-btn.selected {
  border-color: var(--pink-deep);
  background: var(--pink-soft);
  transform: scale(1.08);
}

/* ── lesson screen ───────────────────────────────────────── */
.lesson-top { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.progress-track {
  flex: 1; height: 16px;
  background: #f3e3d3;
  border-radius: 999px;
  overflow: hidden;
  box-shadow: inset 0 2px 3px rgba(160, 120, 100, 0.15);
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--mint-deep), var(--mint));
  border-radius: 999px;
  transition: width 0.5s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
}
.progress-fill::after {
  content: '';
  position: absolute; inset: 3px 4px auto;
  height: 4px;
  background: rgba(255, 255, 255, 0.45);
  border-radius: 999px;
}

.q-card {
  background: var(--paper);
  border-radius: 28px;
  border: 2.5px solid #f6ebdf;
  box-shadow: var(--shadow-card);
  padding: 26px 20px;
  text-align: center;
  margin-bottom: 18px;
  animation: pop-in 0.35s cubic-bezier(0.22, 1.4, 0.36, 1) both;
}
@keyframes pop-in { from { opacity: 0; transform: scale(0.92); } to { opacity: 1; transform: scale(1); } }
.q-prompt { font-size: 0.95rem; font-weight: 700; color: var(--ink-soft); margin-bottom: 12px; }
.q-emoji { font-size: 4.2rem; line-height: 1.1; display: block; margin-bottom: 8px; filter: drop-shadow(0 6px 8px rgba(160, 120, 100, 0.25)); }
.q-word-en { font-family: var(--font-en); font-size: 2.3rem; font-weight: 800; line-height: 1.15; }
.q-word-th { font-size: 1.9rem; font-weight: 700; line-height: 1.3; }
.q-pron {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--butter-soft);
  border: 2px solid var(--butter);
  color: #8a6d2f;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 999px;
  padding: 4px 14px;
  margin-top: 10px;
}
.speak-btn {
  border: none;
  background: var(--blue-soft);
  border: 2px solid var(--blue);
  color: var(--blue-deep);
  width: 54px; height: 54px;
  font-size: 1.5rem;
  border-radius: 50%;
  cursor: pointer;
  margin-top: 12px;
  transition: transform 0.15s;
  display: inline-grid; place-items: center;
}
.speak-btn:active { transform: scale(0.88); }
.speak-btn.big { width: 96px; height: 96px; font-size: 2.6rem; margin-top: 4px; }
.reveal-btn {
  border: 2px dashed var(--butter);
  background: var(--butter-soft);
  color: #8a6d2f;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 999px;
  padding: 8px 18px;
  margin-top: 14px;
  cursor: pointer;
  transition: transform 0.15s;
}
.reveal-btn:active { transform: scale(0.92); }

/* ── speaking questions ──────────────────────────────────── */
.mic-zone {
  margin-top: 22px;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.mic-btn {
  width: 92px; height: 92px;
  border-radius: 50%;
  border: 3px solid var(--pink-deep);
  background: var(--pink-soft);
  font-size: 2.4rem;
  cursor: pointer;
  display: grid; place-items: center;
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.08);
  transition: transform 0.15s;
}
.mic-btn:active { transform: scale(0.9); }
.mic-btn.listening { background: var(--pink); animation: mic-pulse 1s ease-in-out infinite; }
@keyframes mic-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(248, 125, 160, 0.55); }
  50% { box-shadow: 0 0 0 16px rgba(248, 125, 160, 0); }
}
.mic-hint { font-weight: 700; color: var(--ink-soft); text-align: center; }
.mic-out { min-height: 1.4em; font-family: var(--font-en); font-weight: 700; color: var(--ink); }
.self-judge { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* ── learn Thai (farang) mode ────────────────────────────── */
.lang-choice { display: flex; gap: 10px; justify-content: center; margin: 8px 0 14px; }
.lang-btn {
  flex: 1; max-width: 200px;
  background: var(--paper);
  border: 3px solid #eee1d4;
  border-radius: 16px;
  padding: 10px 12px;
  font-family: inherit; font-weight: 700; font-size: 1rem;
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s;
}
.lang-btn.selected { border-color: var(--mint-deep); background: var(--mint-soft); }
.lang-btn:active { transform: scale(0.95); }
.p-lang { font-size: 0.85em; }
/* Thai answer choices for farangs: romanization big, Thai script small */
.c-rom { display: block; font-family: var(--font-en); font-weight: 700; }
.c-th { display: block; font-size: 0.8em; color: var(--ink-soft); }
/* Thai sentence tiles for farangs: same idea */
.tile.rom-tile { display: inline-flex; flex-direction: column; align-items: center; line-height: 1.15; }
.tile .t-rom { font-family: var(--font-en); font-weight: 700; }
.tile .t-th { font-size: 0.72em; color: var(--ink-soft); }
/* romanized line under a Thai sentence prompt */
.q-rom { font-family: var(--font-en); font-weight: 700; color: var(--ink-soft); margin-top: 6px; font-size: 1.05rem; }

/* ── progress export / import ────────────────────────────── */
.sheet-note { font-size: 0.92rem; color: var(--ink-soft); font-weight: 600; margin: 4px 0 10px; }
.code-box {
  width: 100%;
  height: 110px;
  border: 2px dashed var(--butter);
  border-radius: 14px;
  background: var(--butter-soft);
  padding: 10px;
  font-family: monospace;
  font-size: 0.72rem;
  color: var(--ink);
  resize: none;
  word-break: break-all;
  margin-bottom: 12px;
}
.speak-btn.speaking { animation: pulse-speak 0.9s ease-in-out infinite; }
@keyframes pulse-speak {
  0%, 100% { box-shadow: 0 0 0 0 rgba(111, 181, 240, 0.5); }
  50% { box-shadow: 0 0 0 14px rgba(111, 181, 240, 0); }
}

.choices { display: grid; gap: 10px; }
.choices.grid-2 { grid-template-columns: 1fr 1fr; }
.choice-btn {
  font-family: var(--font-thai);
  background: var(--paper);
  border: 2.5px solid #f0e2d3;
  border-radius: 20px;
  box-shadow: 0 4px 0 #f0e2d3;
  padding: 14px 12px;
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.08s, box-shadow 0.08s, border-color 0.15s, background 0.15s;
  line-height: 1.35;
}
.choice-btn .c-emoji { display: block; font-size: 2rem; margin-bottom: 4px; }
.choice-btn .c-en { font-family: var(--font-en); font-weight: 700; font-size: 1.2rem; }
.choice-btn:active { transform: translateY(3px); box-shadow: 0 1px 0 #f0e2d3; }
.choice-btn.correct {
  border-color: var(--mint-deep);
  background: var(--mint-soft);
  box-shadow: 0 4px 0 var(--mint);
  animation: pop-in 0.3s;
}
.choice-btn.wrong {
  border-color: var(--red-deep);
  background: var(--red-soft);
  box-shadow: 0 4px 0 #f0baba;
  animation: shake 0.4s;
}
.choice-btn.faded { opacity: 0.45; }
.choice-btn:disabled { cursor: default; }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  50% { transform: translateX(6px); }
  75% { transform: translateX(-3px); }
}

/* wrong answer: the whole question card flashes red and shakes hard */
.q-card.q-wrong {
  border-color: var(--red-deep);
  background: #ffeaea;
  box-shadow: 0 6px 20px rgba(239, 137, 137, 0.35);
  animation: shake-hard 0.55s;
}
@keyframes shake-hard {
  0%, 100% { transform: translateX(0); }
  12% { transform: translateX(-12px) rotate(-1deg); }
  28% { transform: translateX(11px) rotate(1deg); }
  44% { transform: translateX(-9px); }
  60% { transform: translateX(8px); }
  76% { transform: translateX(-5px); }
  88% { transform: translateX(3px); }
}

/* sentence builder */
.tile-answer {
  min-height: 62px;
  border-bottom: 3px dashed #ecd9c6;
  display: flex; flex-wrap: wrap; gap: 8px;
  align-items: center;
  justify-content: center;
  padding: 8px 4px 12px;
  margin-bottom: 18px;
}
.tile-bank { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.tile {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
  background: var(--paper);
  border: 2.5px solid #f0e2d3;
  box-shadow: 0 4px 0 #f0e2d3;
  border-radius: 14px;
  padding: 9px 16px;
  cursor: pointer;
  transition: transform 0.1s;
  animation: pop-in 0.25s both;
}
.tile:active { transform: translateY(3px); box-shadow: 0 1px 0 #f0e2d3; }
.tile.in-answer { background: var(--blue-soft); border-color: var(--blue); box-shadow: 0 4px 0 var(--blue); }
.tile.ghost-slot { opacity: 0.35; pointer-events: none; background: #f3e9dd; color: transparent; border-style: dashed; box-shadow: none; }
.tile:disabled { cursor: default; }
.tile.th-tile { font-family: var(--font-thai); font-weight: 600; }
.feedback-inner .icon-btn { flex-shrink: 0; }

/* feedback bar */
.feedback-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 30;
  padding: 18px 18px calc(18px + env(safe-area-inset-bottom));
  transform: translateY(110%);
  transition: transform 0.35s cubic-bezier(0.22, 1.2, 0.36, 1);
}
.feedback-bar.show { transform: translateY(0); }
.feedback-inner {
  max-width: 504px;
  margin: 0 auto;
  border-radius: 24px;
  padding: 16px 18px;
  display: flex; align-items: center; gap: 14px;
  box-shadow: 0 -4px 30px rgba(120, 90, 70, 0.18), 0 6px 20px rgba(120, 90, 70, 0.15);
  border: 3px solid #fff;
}
.feedback-bar.good .feedback-inner { background: var(--mint-soft); }
.feedback-bar.bad .feedback-inner { background: var(--red-soft); }
.feedback-msg { flex: 1; font-weight: 700; font-size: 1.05rem; line-height: 1.35; }
.feedback-msg .fb-answer { font-weight: 600; font-size: 0.95rem; margin-top: 2px; }
.feedback-msg .fb-answer .fb-en { font-family: var(--font-en); font-weight: 800; }
.feedback-bar .btn { flex-shrink: 0; }
.feedback-mascot { flex-shrink: 0; }

/* ── results screen ──────────────────────────────────────── */
.results-wrap {
  min-height: calc(100dvh - 60px);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; gap: 16px;
}
.results-title { font-size: 1.7rem; font-weight: 700; line-height: 1.25; }
.results-stats { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.stat-box {
  background: var(--paper);
  border: 2.5px solid #f6ebdf;
  border-radius: 18px;
  padding: 10px 18px;
  min-width: 92px;
  box-shadow: var(--shadow-card);
}
.stat-box .stat-num { font-family: var(--font-en); font-size: 1.5rem; font-weight: 800; }
.stat-box .stat-lbl { font-size: 0.8rem; font-weight: 700; color: var(--ink-soft); line-height: 1.25; }
.results-actions { display: flex; flex-direction: column; gap: 10px; width: 100%; max-width: 340px; margin-top: 8px; }

/* ── settings sheet ──────────────────────────────────────── */
.sheet-backdrop {
  position: fixed; inset: 0;
  background: rgba(92, 74, 69, 0.35);
  backdrop-filter: blur(3px);
  z-index: 40;
  display: grid; place-items: end center;
  animation: fade-in 0.2s;
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
.sheet {
  background: var(--cream);
  border-radius: 28px 28px 0 0;
  width: 100%; max-width: 540px;
  padding: 24px 22px calc(28px + env(safe-area-inset-bottom));
  animation: sheet-up 0.3s cubic-bezier(0.22, 1.2, 0.36, 1);
  display: flex; flex-direction: column; gap: 14px;
}
@keyframes sheet-up { from { transform: translateY(60%); } to { transform: none; } }
.sheet h3 { font-size: 1.25rem; }
.sheet-row {
  background: var(--paper);
  border: 2px solid #f6ebdf;
  border-radius: 18px;
  padding: 13px 16px;
  display: flex; align-items: center; gap: 12px;
  font-weight: 600;
}
.sheet-row .grow { flex: 1; }
.toggle {
  width: 52px; height: 30px;
  border-radius: 999px;
  border: none;
  background: #e8dbcd;
  position: relative;
  cursor: pointer;
  transition: background 0.2s;
  flex-shrink: 0;
}
.toggle::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  transition: left 0.2s;
}
.toggle.on { background: var(--mint-deep); }
.toggle.on::after { left: 25px; }
.danger-link { color: var(--red-deep); font-weight: 700; background: none; border: none; font-family: var(--font-thai); font-size: 1rem; cursor: pointer; padding: 6px; }

/* ── confetti & toast ────────────────────────────────────── */
#confetti-layer { position: fixed; inset: 0; pointer-events: none; z-index: 60; overflow: hidden; }
.confetti-piece {
  position: absolute;
  top: -20px;
  width: 12px; height: 12px;
  animation: confetti-fall linear both;
}
@keyframes confetti-fall {
  to { transform: translateY(110vh) rotate(720deg); opacity: 0.7; }
}

#toast-layer {
  position: fixed;
  top: calc(14px + env(safe-area-inset-top));
  left: 0; right: 0;
  z-index: 70;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  pointer-events: none;
}
.toast {
  background: var(--paper);
  border: 2.5px solid var(--butter);
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(120, 90, 70, 0.25);
  padding: 10px 20px;
  font-weight: 700;
  display: flex; align-items: center; gap: 10px;
  animation: toast-in 0.4s cubic-bezier(0.22, 1.4, 0.36, 1), toast-out 0.4s ease-in 3.4s both;
}
.toast .t-emoji { font-size: 1.4rem; }
@keyframes toast-in { from { transform: translateY(-80px) scale(0.8); opacity: 0; } to { transform: none; opacity: 1; } }
@keyframes toast-out { to { transform: translateY(-80px) scale(0.85); opacity: 0; } }

/* ── version tag ─────────────────────────────────────────── */
.version-tag {
  text-align: center;
  margin-top: 30px;
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--ink-soft);
  opacity: 0.65;
}
.version-tag.has-update {
  opacity: 1;
  cursor: pointer;
  color: var(--pink-dark);
  font-family: var(--font-thai);
  font-weight: 700;
  font-size: 0.95rem;
  animation: pulse-update 1.6s ease-in-out infinite;
}
@keyframes pulse-update { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }

/* ── small screens ───────────────────────────────────────── */
@media (max-width: 460px) {
  .topbar .brand { font-size: 1.05rem; }
  .topbar .brand .logo-emoji { font-size: 1.35rem; }
  .chip { padding: 6px 10px; font-size: 0.9rem; }
  .chip .chip-sub { display: none; }
  .stat-chips { gap: 6px; }
  .stat-chips .icon-btn { width: 38px; height: 38px; font-size: 1rem; }
}
@media (max-width: 380px) {
  .pack-grid { gap: 9px; }
  .q-word-en { font-size: 1.9rem; }
  .chip { padding: 5px 8px; font-size: 0.85rem; }
}