/* ====================================================================
   DREAM OF NUMBERS — 16-bit pixel art styles
   --------------------------------------------------------------------
   ໄຟລ໌ສະໄຕລ໌ — ກຳນົດໜ້າຕາ, ສີ, ຕຳແໜ່ງ ແລະ animation ທັງໝົດ
   ໃນສະໄຕລ໌ pixel art ຍຸກ 16-bit (ເກມເກົ່າ).
   ==================================================================== */

:root{
  --bg0:#0d0820;        /* ສີພື້ນຫຼັງເຂັ້ມສຸດ */
  --bg1:#1a1033;        /* ສີພື້ນຫຼັງກາງ */
  --bg2:#2a1a55;        /* ສີພື້ນຫຼັງອ່ອນ */
  --ink:#f4f0ff;        /* ສີໂຕໜັງສືຫຼັກ */
  --ink-dim:#b9a9e6;    /* ສີໂຕໜັງສືຈືດ */
  --accent:#ffd23f;     /* gold — ສີທອງ (ສີເນັ້ນຫຼັກ) */
  --accent2:#48e5c2;    /* mint — ສີຂຽວມິ້ນ (ສີເນັ້ນຮອງ) */
  --pink:#ff5d8f;       /* ສີບົວ */
  --green:#5dff8f;      /* ສີຂຽວ (ຖືກ) */
  --red:#ff4d5e;        /* ສີແດງ (ຜິດ) */
  --blue:#4db8ff;       /* ສີຟ້າ */
  --purple:#9d6bff;     /* ສີມ່ວງ */
  --panel:rgba(20,12,46,.82);  /* ສີພື້ນກ່ອງ (ໂປ່ງໃສເລັກນ້ອຍ) */
  --panel-edge:#3d2a78;        /* ສີຂອບກ່ອງ */
  --shadow:0 0 0 4px #0d0820, 0 0 0 8px #3d2a78;  /* ເງົາຂອບແບບ pixel (ຊ້ອນ 2 ຊັ້ນ) */
  --font-pixel:'Press Start 2P', monospace;  /* ຟອນ pixel (ໂຕເລກ/ອັງກິດ) */
  --font-lao:'Noto Sans Lao', sans-serif;    /* ຟອນລາວ */
}

*{box-sizing:border-box; margin:0; padding:0;}
html,body{height:100%;}
body{
  background:#000;
  font-family:var(--font-lao);
  color:var(--ink);
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
  -webkit-font-smoothing:auto;
  image-rendering:pixelated;
  touch-action:manipulation;
}

.game-frame{
  --w1:#1f7a3d; --w2:#5b2a86; --w3:#10204a;
}
.theme-w1{ --bg0:#06210f; --bg1:#0d3a1d; --bg2:#1f7a3d; --accent2:#9dffb0; }
.theme-w2{ --bg0:#1a0b2e; --bg1:#2c1250; --bg2:#5b2a86; --accent2:#ff9de2; }
.theme-w3{ --bg0:#03081f; --bg1:#091640; --bg2:#10306a; --accent2:#7fd8ff; }

/* ---------- ກອບເກມ ---------- */
.game-frame{
  position:relative;
  width:100%;
  height:100%;
  max-width:920px;
  max-height:100vh;
  aspect-ratio:9/16;
  overflow:hidden;
  background:radial-gradient(120% 80% at 50% 0%, var(--bg2) 0%, var(--bg1) 45%, var(--bg0) 100%);
  transition:background .6s ease;
}
@media (min-aspect-ratio:1/1){
  .game-frame{ aspect-ratio:16/10; max-width:1100px; }
}

/* ---------- ເອັບເຟັກພື້ນຫຼັງ ---------- */
.bg-layer{ position:absolute; inset:0; pointer-events:none; }
#bgStars{
  background-image:
    radial-gradient(1px 1px at 20% 30%, #fff 50%, transparent),
    radial-gradient(1px 1px at 70% 60%, #fff 50%, transparent),
    radial-gradient(2px 2px at 40% 80%, var(--accent) 50%, transparent),
    radial-gradient(1px 1px at 85% 15%, var(--accent2) 50%, transparent),
    radial-gradient(1px 1px at 55% 45%, #fff 50%, transparent),
    radial-gradient(2px 2px at 10% 70%, var(--pink) 50%, transparent);
  background-size:300px 300px;
  opacity:.7;
  animation:drift 60s linear infinite;
}
#bgGrid{
  background-image:linear-gradient(transparent 95%, rgba(157,107,255,.15) 95%),
                   linear-gradient(90deg, transparent 95%, rgba(157,107,255,.15) 95%);
  background-size:32px 32px;
  transform:perspective(300px) rotateX(60deg) translateY(20%) scale(2);
  transform-origin:bottom;
  opacity:.4;
  animation:gridmove 8s linear infinite;
}
@keyframes drift{ to{ background-position:300px 300px; } }
@keyframes gridmove{ to{ background-position:0 32px; } }

.scanlines{
  position:absolute; inset:0; pointer-events:none; z-index:50;
  background:repeating-linear-gradient(transparent 0 2px, rgba(0,0,0,.18) 2px 4px);
  mix-blend-mode:multiply; opacity:.5;
}
#fxCanvas{ position:absolute; inset:0; z-index:60; pointer-events:none; }

.bg-symbol{
  position:absolute; font-family:var(--font-pixel); color:rgba(157,107,255,.18);
  user-select:none; pointer-events:none; animation:floatUp linear infinite;
}
@keyframes floatUp{
  from{ transform:translateY(110%) rotate(0); }
  to{ transform:translateY(-20vh) rotate(360deg); }
}

.story-float{
  position:absolute; font-family:var(--font-pixel); font-size:clamp(16px,4vw,32px);
  color:rgba(72,229,194,.6); pointer-events:none; user-select:none;
  text-shadow:0 0 8px rgba(72,229,194,.8), 0 0 16px rgba(157,107,255,.4);
  animation:storyFloat linear infinite, floatWave ease-in-out infinite;
  filter:drop-shadow(0 0 4px rgba(72,229,194,.4));
}
.story-float.num-1{ animation:storyFloat 6s linear infinite, floatWave 2.4s ease-in-out infinite; left:15%; bottom:10%; }
.story-float.num-2{ animation:storyFloat 7s linear infinite, floatWave 2.8s ease-in-out infinite; left:70%; bottom:20%; animation-delay:-.5s; }
.story-float.num-3{ animation:storyFloat 8s linear infinite, floatWave 3s ease-in-out infinite; left:35%; bottom:30%; animation-delay:-1s; }
.story-float.num-4{ animation:storyFloat 5.5s linear infinite, floatWave 2.2s ease-in-out infinite; left:80%; bottom:5%; animation-delay:-2s; }
.story-float.sym-1{ animation:storyFloat 6.5s linear infinite, floatWave 2.6s ease-in-out infinite; left:25%; bottom:40%; animation-delay:-.8s; }
.story-float.sym-2{ animation:storyFloat 7.5s linear infinite, floatWave 3.2s ease-in-out infinite; left:60%; bottom:15%; animation-delay:-1.5s; }
@keyframes storyFloat{
  0%{ transform:translateY(100%) rotate(0deg) scale(1); opacity:0.2; }
  10%{ opacity:0.6; }
  90%{ opacity:0.3; }
  100%{ transform:translateY(-120%) rotate(360deg) scale(0.7); opacity:0; }
}
@keyframes floatWave{
  0%,100%{ transform:translateX(0) scale(1); filter:drop-shadow(0 0 4px rgba(72,229,194,.4)); }
  25%{ transform:translateX(8px) scale(1.05); filter:drop-shadow(0 0 8px rgba(72,229,194,.6)); }
  50%{ transform:translateX(0) scale(1); filter:drop-shadow(0 0 4px rgba(72,229,194,.4)); }
  75%{ transform:translateX(-8px) scale(1.05); filter:drop-shadow(0 0 8px rgba(72,229,194,.6)); }
}

/* ---------- ໜ້າຈໍ (screens) ---------- */
.screen{
  position:absolute; inset:0; z-index:10;
  display:none; flex-direction:column; align-items:center; justify-content:center;
  padding:24px; text-align:center;
  animation:screenIn .35s ease;
}
.screen.active{ display:flex; }
@keyframes screenIn{ from{ opacity:0; transform:scale(.98); } to{ opacity:1; transform:scale(1); } }

.screen-title{
  font-family:var(--font-lao); font-size:clamp(14px,3.5vw,24px);
  color:var(--accent); text-shadow:3px 3px 0 #000, 0 0 12px var(--accent);
  margin-bottom:18px; letter-spacing:1px; font-weight:700;
}
.sub-title{
  font-family:var(--font-lao); font-size:clamp(9px,2vw,13px);
  color:var(--ink-dim); margin:18px 0 8px; font-weight:700;
}

/* ---------- ໜ້າຫຼັກ (title) ---------- */
.title-wrap{ display:flex; flex-direction:column; align-items:center; gap:6px; }
.pixel-logo{ display:flex; flex-direction:column; line-height:1; margin-bottom:10px; }
/* logo-row = ໂຕອັກສອນໂລໂກ້ ໄລ່ສີຮຸ້ງຕໍ່ໂຕ (gradient) + ເງົາ 3D pixel */
.logo-row{
  font-family:var(--font-pixel);
  font-size:clamp(26px,9vw,64px);
  background:linear-gradient(100deg,#ffd23f 0%,#ff9f43 26%,#ff5d5d 50%,#ff5d8f 74%,#b86bff 100%);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
  filter:drop-shadow(4px 4px 0 #160a2b) drop-shadow(0 0 14px rgba(255,150,80,.5));
  animation:logoBob 3s ease-in-out infinite;
}
.logo-of{
  font-size:clamp(16px,5vw,34px); align-self:center; margin:2px 0;
  background:linear-gradient(180deg,#7dffd6 0%,#3fd9bd 100%);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
  filter:drop-shadow(3px 3px 0 #160a2b) drop-shadow(0 0 10px rgba(72,229,194,.5));
}
.logo-num{
  background:linear-gradient(100deg,#ff5d8f 0%,#c86bff 32%,#6b9bff 64%,#48e5c2 100%);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
  filter:drop-shadow(4px 4px 0 #160a2b) drop-shadow(0 0 14px rgba(90,150,255,.5));
}
@keyframes logoBob{ 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(-8px);} }

.title-sub{ font-size:clamp(12px,3vw,16px); color:var(--ink-dim); margin-bottom:20px; max-width:30ch; }

.menu{ display:flex; flex-direction:column; gap:12px; width:min(280px,80vw); }

.lang-quick{ display:flex; gap:8px; margin-top:14px; }
.chip{
  font-family:var(--font-lao); font-size:10px; padding:8px 14px; cursor:pointer;
  background:var(--panel); color:var(--ink); border:3px solid var(--panel-edge);
  border-radius:0; transition:.15s; font-weight:700;
}
.chip:hover,.chip.on{ background:var(--accent); color:#000; border-color:#000; }

.hint{ margin-top:18px; font-family:var(--font-lao); font-size:9px; color:var(--ink-dim); font-weight:700; }
.blink{ animation:blink 1.2s steps(2) infinite; }
@keyframes blink{ 50%{ opacity:0; } }

/* ---------- ປຸ່ມ (buttons) ---------- */
.btn{
  font-family:var(--font-lao); font-size:clamp(9px,2.4vw,13px);
  padding:14px 18px; cursor:pointer; color:var(--ink);
  background:var(--panel); border:3px solid var(--panel-edge);
  box-shadow:4px 4px 0 #000; transition:transform .08s, background .15s, box-shadow .08s;
  letter-spacing:1px; line-height:1.4; font-weight:700;
}
.btn:hover{ background:var(--bg2); transform:translate(-2px,-2px); box-shadow:6px 6px 0 #000, 0 0 12px rgba(72,229,194,.4); }
.btn:active{ transform:translate(2px,2px); box-shadow:1px 1px 0 #000; }
.btn-primary{ background:var(--accent); color:#000; border-color:#000; box-shadow:4px 4px 0 #000, 0 0 8px rgba(255,210,63,.3); }
.btn-primary:hover{ background:#ffe26b; box-shadow:6px 6px 0 #000, 0 0 16px rgba(255,210,63,.5); }
.btn-small{ padding:10px 14px; font-size:clamp(8px,2vw,11px); }
.btn.ghost{ background:transparent; }
.btn.danger{ background:var(--red); color:#fff; border-color:#000; }

/* ---------- ບົດເລື່ອງ / ກາຕູນ ---------- */
.story-stage{
  width:min(560px,92vw); height:min(420px,55vh);
  background:#000; border:4px solid var(--panel-edge); box-shadow:var(--shadow);
  position:relative; overflow:hidden; display:flex; align-items:flex-end;
  transition:background .8s ease, box-shadow .8s ease;
}
#screenStory:has(.scene-dream) .story-stage,
#screenEnding:has(.scene-dream) .story-stage {
  box-shadow:0 0 20px rgba(157,107,255,.5), 0 0 40px rgba(72,229,194,.3), 0 0 0 4px var(--panel-edge), 0 0 0 8px #000;
}
.story-art{ position:absolute; inset:0; transition:opacity .5s; }
.story-text{
  position:relative; z-index:2; width:100%;
  background:linear-gradient(transparent, rgba(0,0,0,.92) 40%);
  padding:40px 20px 18px; font-size:clamp(13px,3.4vw,18px); line-height:1.6;
  min-height:90px; font-family:var(--font-lao); font-weight:700;
  animation:storyFadeIn .6s ease forwards;
  text-shadow:0 0 8px rgba(72,229,194,.3), 2px 2px 4px #000;
}
@keyframes storyFadeIn{ from{ opacity:0; transform:translateY(6px); } to{ opacity:1; transform:translateY(0); } }
.story-controls{
  display:flex; gap:12px; margin-top:18px;
  animation:controlsSlideUp .5s ease forwards;
}
@keyframes controlsSlideUp{ from{ opacity:0; transform:translateY(20px); } to{ opacity:1; transform:translateY(0); } }

.scene-classroom{ background:linear-gradient(#7ec8ff 0 55%, #c9a86a 55% 100%); animation:sceneSlide .8s ease; }
.scene-sleepy{ background:linear-gradient(#3a5b8c 0 55%, #6b5a3a 55% 100%); filter:brightness(.7); animation:sceneFade .8s ease; }
.scene-fade{ background:#000; animation:sceneDarken .8s ease; }
.scene-dream{
  background:radial-gradient(circle at 50% 40%, #5b2a86, #1a0b2e);
  box-shadow:inset 0 0 40px rgba(157,107,255,.3);
  animation:dreamGlow 4s ease-in-out infinite, scenePulse .8s ease;
}
@keyframes dreamGlow{ 0%,100%{ box-shadow:inset 0 0 40px rgba(157,107,255,.3); } 50%{ box-shadow:inset 0 0 60px rgba(157,107,255,.5); } }
@keyframes sceneSlide{ from{ transform:translateY(20px); opacity:.8; } to{ transform:translateY(0); opacity:1; } }
@keyframes sceneFade{ from{ filter:brightness(.5); opacity:.6; } to{ filter:brightness(.7); opacity:1; } }
@keyframes sceneDarken{ from{ background:#333; opacity:.8; } to{ background:#000; opacity:1; } }
@keyframes scenePulse{ from{ filter:brightness(1.1) saturate(1.2); } to{ filter:brightness(1) saturate(1); } }
.scene-forest{ background:linear-gradient(#2a6b3d 0 60%, #14401d 60% 100%); animation:sceneSlide .8s ease; }
.scene-castle{ background:linear-gradient(#3a2566 0 60%, #1f1340 60% 100%); animation:sceneSlide .8s ease; }
.scene-galaxy{ background:radial-gradient(circle at 50% 30%, #10306a, #03081f); animation:sceneSlide .8s ease; }
.scene-wake{ background:linear-gradient(#aee4ff 0 55%, #d8c08a 55% 100%); animation:sceneBrighten .8s ease; }
@keyframes sceneBrighten{ from{ filter:brightness(.8); opacity:.7; } to{ filter:brightness(1); opacity:1; } }

.actor{
  position:absolute; bottom:18%; left:50%; transform:translateX(-50%);
  width:64px; height:96px; image-rendering:pixelated;
  animation:actorBob 2.4s ease-in-out infinite, actorEnter .6s cubic-bezier(.34,1.56,.64,1) forwards;
  filter:drop-shadow(0 0 6px rgba(72,229,194,.4));
}
@keyframes actorBob{ 0%,100%{ transform:translateX(-50%) translateY(0);} 50%{ transform:translateX(-50%) translateY(-6px);} }
@keyframes actorEnter{ from{ opacity:0; transform:translateX(-50%) scale(.4) translateY(40px); filter:drop-shadow(0 0 0); } to{ opacity:1; transform:translateX(-50%) scale(1) translateY(0); filter:drop-shadow(0 0 6px rgba(72,229,194,.4)); } }
.zzz{ position:absolute; top:18%; left:58%; font-family:var(--font-pixel); color:#fff;
  font-size:18px; animation:zzz 2.2s ease-in-out infinite; opacity:0;
  text-shadow:0 0 8px rgba(72,229,194,.6), 0 0 4px rgba(157,107,255,.4); }
@keyframes zzz{ 0%{opacity:0; transform:translateY(0) scale(.6);} 40%{opacity:1;} 100%{opacity:0; transform:translateY(-40px) scale(1.2);} }

/* ---------- ໜ້າເລືອກໂລກ ---------- */
.world-list{ display:flex; gap:12px; flex-wrap:wrap; justify-content:center; }
.world-card{
  width:140px; padding:14px 10px; cursor:pointer; position:relative;
  background:var(--panel); border:4px solid var(--panel-edge); box-shadow:4px 4px 0 #000;
  display:flex; flex-direction:column; align-items:center; gap:8px; transition:.12s;
}
.world-card:hover{ transform:translateY(-4px); border-color:var(--accent); }
.world-card.sel{ border-color:var(--accent); box-shadow:0 0 0 3px var(--accent),4px 4px 0 #000; }
.world-card.locked{ opacity:.5; filter:grayscale(.7); cursor:not-allowed; }
.world-ico{ width:72px; height:56px; image-rendering:pixelated; border:2px solid #000; }
.wi-1{ background:linear-gradient(#2a6b3d 0 60%,#14401d 60%); }
.wi-2{ background:linear-gradient(#3a2566 0 60%,#1f1340 60%); }
.wi-3{ background:radial-gradient(circle at 50% 35%,#10306a,#03081f); }
.world-name{ font-family:var(--font-lao); font-size:9px; line-height:1.4; font-weight:700; }
.world-card .lock{ position:absolute; top:6px; right:6px; font-size:16px; }
.world-best{ font-size:11px; color:var(--ink-dim); font-family:var(--font-lao); font-weight:700; }

/* ---------- ບັດລະດັບຄວາມຍາກ ---------- */
.diff-list{ display:flex; gap:10px; flex-wrap:wrap; justify-content:center; }
.diff-card{
  width:150px; padding:12px; cursor:pointer; text-align:left;
  background:var(--panel); border:3px solid var(--panel-edge); box-shadow:4px 4px 0 #000;
  display:flex; flex-direction:column; gap:6px; transition:.12s;
}
.diff-card:hover{ transform:translateY(-3px); }
.diff-card.sel{ border-color:var(--accent2); box-shadow:0 0 0 3px var(--accent2),4px 4px 0 #000; }
.diff-name{ font-family:var(--font-lao); font-size:11px; color:var(--accent); font-weight:700; }
.diff-meta{ font-size:11px; color:var(--ink-dim); line-height:1.5; font-family:var(--font-lao); font-weight:700; }

.select-actions{ display:flex; gap:12px; margin-top:24px; flex-wrap:wrap; justify-content:center; }

/* ---------- HUD ---------- */
.hud{
  position:absolute; top:0; left:0; right:0; z-index:20;
  display:flex; align-items:center; gap:10px; flex-wrap:wrap;
  padding:10px 12px; background:linear-gradient(rgba(13,8,32,.9), transparent);
}
.hud-item{ font-family:var(--font-lao); font-size:clamp(9px,2.4vw,13px); display:flex; align-items:center; gap:5px; font-weight:700; }
.hud-ico{ font-size:1.1em; }
.hearts{ letter-spacing:2px; font-size:16px; }
.heart{ display:inline-block; transition:transform .3s; }
.heart.lost{ filter:grayscale(1) brightness(.5); transform:scale(.7); }
.combo.pulse{ animation:comboPulse .4s; }
@keyframes comboPulse{ 0%{ transform:scale(1);} 50%{ transform:scale(1.4); color:var(--accent);} 100%{ transform:scale(1);} }

.timer-bar{ width:72px; height:10px; background:#000; border:2px solid var(--panel-edge); overflow:hidden; }
#timerFill{ display:block; height:100%; width:100%; background:var(--green); transition:width .1s linear; }
#timerFill.warn{ background:var(--accent); }
#timerFill.crit{ background:var(--red); animation:critBlink .4s steps(2) infinite; }
@keyframes critBlink{ 50%{ opacity:.4; } }
.timer-num{ font-size:11px; }

.world-banner{
  position:absolute; top:54px; left:0; right:0; text-align:center; z-index:15;
  font-family:var(--font-lao); font-size:10px; color:var(--accent2);
  text-shadow:2px 2px 0 #000; opacity:.85; font-weight:700;
}

/* ---------- ໂຈດ ແລະ ໂຕເລືອກ ---------- */
.question-area{ display:flex; flex-direction:column; align-items:center; gap:18px; width:100%; max-width:520px; }
.question-card{
  margin-top:30px; padding:26px 30px; background:var(--panel);
  border:4px solid var(--panel-edge); box-shadow:var(--shadow);
  min-width:min(360px,86vw);
}
.question-card.shake{ animation:shake .35s; }
@keyframes shake{ 0%,100%{transform:translateX(0);} 20%{transform:translateX(-8px);} 40%{transform:translateX(8px);} 60%{transform:translateX(-5px);} 80%{transform:translateX(5px);} }
.question{
  font-family:var(--font-pixel); font-size:clamp(20px,7vw,40px);
  color:var(--ink); text-shadow:3px 3px 0 #000; letter-spacing:2px; font-weight:700;
}

.answers{ display:flex; flex-direction:column; gap:10px; width:min(360px,86vw); }
.answer{
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  padding:12px 16px; background:var(--panel); border:3px solid var(--panel-edge);
  box-shadow:3px 3px 0 #000; transition:.12s;
}
.answer .code{ font-family:var(--font-pixel); font-size:clamp(13px,4vw,20px); color:var(--accent); letter-spacing:3px; }
.answer .arrow{ color:var(--ink-dim); }
.answer .val{ font-family:var(--font-pixel); font-size:clamp(13px,4vw,20px); color:var(--ink); }
.answer.typing{ border-color:var(--accent2); box-shadow:0 0 0 2px var(--accent2),3px 3px 0 #000; }
.answer.match-correct{ animation:flashGreen .5s; border-color:var(--green); }
.answer.match-wrong{ animation:flashRed .5s; border-color:var(--red); }
.answer .code .lit{ color:var(--accent2); text-shadow:0 0 8px var(--accent2); }
@keyframes flashGreen{ 0%,100%{ background:var(--panel);} 50%{ background:rgba(93,255,143,.35);} }
@keyframes flashRed{ 0%,100%{ background:var(--panel);} 50%{ background:rgba(255,77,94,.35);} }

.answer.tut-hl{ border-color:var(--accent); box-shadow:0 0 0 3px var(--accent),3px 3px 0 #000; animation:tutGlow 1s ease-in-out infinite; }
@keyframes tutGlow{ 0%,100%{ box-shadow:0 0 0 3px var(--accent),3px 3px 0 #000;} 50%{ box-shadow:0 0 0 6px var(--accent),3px 3px 0 #000;} }

/* ---------- ບໍລິເວນພິມລະຫັດ ---------- */
.type-zone{ position:absolute; bottom:26px; left:0; right:0; display:flex; flex-direction:column; align-items:center; gap:8px; z-index:20; padding:0 16px; }
.type-label{ font-family:var(--font-lao); font-size:10px; color:var(--ink-dim); font-weight:700; }
.type-display{
  font-family:var(--font-pixel); font-size:clamp(20px,6vw,32px); letter-spacing:8px;
  color:var(--accent2); background:#000; border:3px solid var(--accent2);
  box-shadow:0 0 16px rgba(72,229,194,.5); padding:12px 22px; min-width:200px; text-align:center;
}
.type-display .caret{ animation:blink .8s steps(2) infinite; color:var(--accent); }
#codeInput{
  position:fixed; bottom:0; left:50%; transform:translateX(-50%);
  width:1px; height:1px; opacity:0; pointer-events:none;
  border:none; outline:none; background:transparent; color:transparent;
  caret-color:transparent; font-size:16px; /* ກັນ iOS zoom ເມື່ອ focus */
}

.btn-pause{
  position:absolute; top:10px; right:10px; z-index:25; width:38px; height:38px;
  font-size:16px; background:var(--panel); color:var(--ink); border:3px solid var(--panel-edge);
  box-shadow:3px 3px 0 #000; cursor:pointer;
}

/* ---------- ໜ້າຜົນການຫຼິ້ນ ---------- */
.rank-badge{
  font-family:var(--font-pixel); font-size:80px; width:160px; height:160px;
  display:flex; align-items:center; justify-content:center; margin:8px 0 18px;
  border:6px solid var(--accent); border-radius:50%; color:var(--accent);
  text-shadow:0 0 20px var(--accent); box-shadow:0 0 30px rgba(255,210,63,.4), inset 0 0 30px rgba(255,210,63,.2);
  animation:rankPop .6s cubic-bezier(.2,1.6,.5,1);
}
.rank-S{ color:var(--accent); border-color:var(--accent); }
.rank-A{ color:var(--green); border-color:var(--green); text-shadow:0 0 20px var(--green); }
.rank-B{ color:var(--blue); border-color:var(--blue); text-shadow:0 0 20px var(--blue); }
.rank-C{ color:var(--purple); border-color:var(--purple); text-shadow:0 0 20px var(--purple); }
.rank-D{ color:var(--ink-dim); border-color:var(--ink-dim); text-shadow:none; }
@keyframes rankPop{ 0%{ transform:scale(0) rotate(-180deg);} 100%{ transform:scale(1) rotate(0);} }

.result-grid{ display:grid; grid-template-columns:repeat(2,minmax(120px,1fr)); gap:12px; width:min(380px,86vw); }
.result-cell{ background:var(--panel); border:3px solid var(--panel-edge); box-shadow:3px 3px 0 #000; padding:12px; }
.result-cell .rl{ font-size:11px; color:var(--ink-dim); font-family:var(--font-lao); font-weight:700; }
.result-cell .rv{ font-family:var(--font-pixel); font-size:18px; color:var(--accent); margin-top:6px; }

/* ---------- ກ່ອງສະແດງອັນດັບ (ໃນໜ້າຜົນ) ---------- */
.rank-panel{ width:min(380px,86vw); margin:16px 0 6px; }
.rank-label{ display:block; font-size:11px; color:var(--ink-dim); font-weight:700; margin-bottom:8px; }
.name-row{ display:flex; gap:8px; }
.name-input{
  flex:1; font-family:var(--font-lao); font-size:13px; font-weight:700; color:var(--ink);
  background:var(--bg0); border:3px solid var(--panel-edge); box-shadow:inset 2px 2px 0 #000;
  padding:10px 12px; outline:none; min-width:0; width:100%;
}
.name-input:focus{ border-color:var(--accent2); }
.rank-result{ display:none; }
.rank-result.show{ display:block; animation:rankPop .5s cubic-bezier(.2,1.6,.5,1); }
.rank-big{
  font-family:var(--font-pixel); font-size:34px; color:var(--accent);
  text-shadow:0 0 14px var(--accent); line-height:1.1;
}
.rank-big .slash{ color:var(--ink-dim); font-size:20px; }
.rank-sub{ font-size:12px; color:var(--accent2); font-weight:700; margin-top:6px; }
.rank-tag{ font-size:10px; color:var(--ink-dim); margin-top:4px; }
.rank-best{ font-size:11px; color:var(--ink-dim); font-weight:700; margin-top:6px; letter-spacing:.04em; }
.rank-best.new{
  color:#000; background:var(--accent); display:inline-block;
  padding:4px 10px; border-radius:3px; font-size:12px;
  box-shadow:0 0 14px rgba(255,210,63,.6); animation:rankPop .5s cubic-bezier(.2,1.6,.5,1);
}

/* ---------- Mini leaderboard ໃນໜ້າຜົນ ---------- */
.mini-board{
  margin-top:14px; width:100%;
  display:flex; flex-direction:column;
}
.mini-title{
  font-size:9px; color:var(--ink-dim); font-weight:700; letter-spacing:.08em;
  margin-bottom:6px; flex-shrink:0;
}
/* ກ່ອງ row ດ້ານຊ້າຍ + ປຸ່ມລູກສອນດ້ານຂວາ */
.mini-wrap{
  display:flex; gap:6px; align-items:stretch;
  max-height:32vh; min-height:140px;
}
/* ກ່ອງ scroll ດ້ານຊ້າຍ */
.mini-scroll{
  flex:1; overflow-y:auto; overflow-x:hidden;
  -webkit-overflow-scrolling:touch;
  overscroll-behavior:contain;
  touch-action:pan-y;
  padding:2px 4px 2px 2px;
  scrollbar-width:thin; scrollbar-color:var(--accent) transparent;
}
.mini-scroll::-webkit-scrollbar{ width:6px; }
.mini-scroll::-webkit-scrollbar-track{ background:rgba(255,255,255,.05); border-radius:3px; }
.mini-scroll::-webkit-scrollbar-thumb{ background:var(--accent); border-radius:3px; }
/* ປຸ່ມລູກສອນ ▲▼ — ໃຫ້ກົດງ່າຍໃນໂທລະສັບ */
.mini-arrows{
  display:flex; flex-direction:column; gap:4px;
  width:42px; flex-shrink:0;
}
.mini-arrow{
  flex:1; padding:0;
  display:flex; align-items:center; justify-content:center;
  background:var(--panel); color:var(--accent);
  border:2px solid var(--accent); border-radius:0;
  font-family:var(--font-pixel); font-size:14px; font-weight:bold;
  cursor:pointer; user-select:none; touch-action:manipulation;
  box-shadow:2px 2px 0 #000;
  transition:transform .08s;
}
.mini-arrow:active{
  background:var(--accent); color:#000;
  transform:translate(1px,1px); box-shadow:1px 1px 0 #000;
}
.mini-row{
  display:grid; grid-template-columns:30px 1fr auto; align-items:center; gap:8px;
  padding:6px 10px; margin-bottom:4px;
  background:var(--panel); border:2px solid var(--panel-edge);
}
.mini-row.mini-me{ border-color:var(--accent); box-shadow:0 0 10px rgba(255,210,63,.3); }
.mini-rank{ font-family:var(--font-pixel); font-size:10px; color:var(--ink-dim); text-align:center; }
.mini-row.top1 .mini-rank{ color:var(--accent); }
.mini-row.top2 .mini-rank{ color:#cfd8e8; }
.mini-row.top3 .mini-rank{ color:#e0954a; }
.mini-name{ font-family:var(--font-lao); font-weight:700; font-size:11px; color:var(--ink); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.mini-score{ font-family:var(--font-pixel); font-size:11px; color:var(--accent); }

/* ---------- ໜ້າ leaderboard ---------- */
.board-status{ font-size:10px; font-weight:700; margin-bottom:12px; letter-spacing:1px; }
.board-status.on{ color:var(--green); }
.board-status.off{ color:var(--ink-dim); }
.board-status.live-pulse{
  color:#000; background:var(--accent); padding:4px 10px; border-radius:3px;
  animation:livePulse .6s ease-out;
}
@keyframes livePulse{
  0%   { transform:scale(.85); box-shadow:0 0 0 0 rgba(255,210,63,.7); }
  50%  { transform:scale(1.08); }
  100% { transform:scale(1); box-shadow:0 0 0 14px rgba(255,210,63,0); }
}

/* ໜ້າ leaderboard: ປ່ຽນຈາກ centered → top-aligned + scroll ໄດ້ ຖ້າເນື້ອຫາຍາວ */
#screenLeader.active{ justify-content:flex-start; padding-top:18px; overflow-y:auto; }

/* ໜ້າຜົນ: ໃຫ້ scroll ໄດ້ ກໍລະນີຈໍນ້ອຍ + mini-board ຍາວ */
#screenResult.active{
  justify-content:flex-start; padding-top:14px; padding-bottom:40px;
  overflow-y:auto; -webkit-overflow-scrolling:touch; touch-action:pan-y;
}
/* ປຸ່ມລຸ່ມ: ໃຫ້ stick ຢູ່ ມີ space ພຽງພໍຈາກ mini-board */
#screenResult .select-actions{ margin-top:14px; }
/* ກ່ອງລວມ: list ດ້ານຊ້າຍ + ປຸ່ມລູກສອນ ▲▼ ດ້ານຂວາ */
.board-wrap{
  display:flex; gap:6px; align-items:stretch;
  width:min(440px, 92vw); max-height:60vh; min-height:200px;
}
.board-list{
  flex:1; overflow-y:auto; overflow-x:hidden;
  display:flex; flex-direction:column; gap:6px; padding:4px;
  -webkit-overflow-scrolling:touch;
  overscroll-behavior:contain;
  scrollbar-width:thin; scrollbar-color:var(--accent) transparent;
  scroll-behavior:smooth;
  touch-action:pan-y;
}
.board-list::-webkit-scrollbar{ width:6px; }
.board-list::-webkit-scrollbar-track{ background:rgba(255,255,255,.05); border-radius:3px; }
.board-list::-webkit-scrollbar-thumb{ background:var(--accent); border-radius:3px; }
.board-arrows{
  display:flex; flex-direction:column; gap:4px;
  width:44px; flex-shrink:0;
}
.board-loading{ color:var(--ink-dim); font-weight:700; padding:24px; font-size:12px; }
.board-row{
  display:grid; grid-template-columns:38px 1fr auto; align-items:center; gap:10px;
  background:var(--panel); border:3px solid var(--panel-edge); box-shadow:3px 3px 0 #000;
  padding:9px 12px; text-align:left;
}
.board-row.me{ border-color:var(--accent); box-shadow:3px 3px 0 #000, 0 0 12px rgba(255,210,63,.4); }
.board-rank{ font-family:var(--font-pixel); font-size:13px; color:var(--ink-dim); text-align:center; }
.board-row.top1 .board-rank{ color:var(--accent); }
.board-row.top2 .board-rank{ color:#cfd8e8; }
.board-row.top3 .board-rank{ color:#e0954a; }
.board-name{ font-family:var(--font-lao); font-weight:700; font-size:13px; color:var(--ink); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.board-name .me-tag{ font-size:9px; color:#000; background:var(--accent); padding:1px 5px; margin-left:6px; border-radius:2px; }
.board-meta{ font-size:9px; color:var(--ink-dim); font-weight:700; margin-top:2px; }
.board-score{ font-family:var(--font-pixel); font-size:14px; color:var(--accent); }

/* ---------- ໂໝດແຂ່ງ (ranked) ---------- */
.btn-ranked{ border-color:var(--accent2); box-shadow:4px 4px 0 #000, 0 0 10px rgba(72,229,194,.35); }
.btn-ranked:hover{ background:var(--bg2); box-shadow:6px 6px 0 #000, 0 0 16px rgba(72,229,194,.55); }
.ranked-desc{ font-size:clamp(11px,2.6vw,14px); color:var(--ink-dim); max-width:34ch; margin-bottom:20px; line-height:1.6; font-weight:700; }
.ranked-box{ display:flex; flex-direction:column; align-items:center; gap:14px; width:min(340px,86vw); margin-bottom:8px; }
.ranked-box.hide{ display:none; }
.ranked-note{ font-size:12px; color:var(--ink-dim); font-weight:700; }
.ranked-demo{ font-size:10px; color:var(--accent); font-weight:700; line-height:1.5; max-width:30ch; }
.ranked-user{ font-size:12px; color:var(--accent2); font-weight:700; word-break:break-word; }
.btn-google{ display:inline-flex; align-items:center; gap:10px; justify-content:center; }
.g-ico{
  display:inline-flex; align-items:center; justify-content:center; width:22px; height:22px;
  background:#fff; color:#4285F4; font-family:var(--font-pixel); font-size:12px;
  border:2px solid #000; border-radius:3px;
}
.ranked-welcome{
  font-family:var(--font-lao); font-size:clamp(16px,4.5vw,26px); color:var(--accent2);
  text-shadow:2px 2px 0 #000, 0 0 14px rgba(72,229,194,.5); font-weight:900;
  max-width:24ch; line-height:1.5; margin-bottom:30px; animation:fbPop .5s ease;
}
.ranked-countdown{
  font-family:var(--font-pixel); font-size:clamp(60px,20vw,120px); color:var(--accent);
  text-shadow:5px 5px 0 #000, 0 0 30px var(--accent); line-height:1;
}
.ranked-countdown.go{ color:var(--green); text-shadow:5px 5px 0 #000, 0 0 30px var(--green); }
.ranked-countdown.bump{ animation:cdBump .5s ease; }
@keyframes cdBump{ 0%{ transform:scale(.3); opacity:0; } 50%{ transform:scale(1.25); opacity:1; } 100%{ transform:scale(1); } }

/* ---------- popup (modals) ---------- */
.modal{ position:absolute; inset:0; z-index:80; display:none; align-items:center; justify-content:center; background:rgba(5,2,16,.82); padding:20px; }
.modal.open{ display:flex; animation:screenIn .25s ease; }
.modal-box{
  width:min(440px,92vw); max-height:90%; overflow:auto;
  background:var(--bg1); border:4px solid var(--panel-edge); box-shadow:var(--shadow);
  padding:22px; display:flex; flex-direction:column; gap:14px;
}
.modal-box h3{ font-family:var(--font-lao); font-size:14px; color:var(--accent); text-align:center; font-weight:700; }

.howto-steps{ list-style:none; display:flex; flex-direction:column; gap:10px; }
.howto-steps li{ display:flex; gap:10px; align-items:center; font-size:14px; line-height:1.4; font-family:var(--font-lao); font-weight:700; }
.step-num{ flex:0 0 auto; width:26px; height:26px; display:flex; align-items:center; justify-content:center;
  font-family:var(--font-pixel); font-size:11px; background:var(--accent); color:#000; }
.howto-demo{ background:#000; border:3px solid var(--panel-edge); padding:14px; display:flex; flex-direction:column; gap:8px; align-items:center; }
.demo-q{ font-family:var(--font-pixel); font-size:16px; color:var(--ink); }
.demo-ans{ display:flex; flex-direction:column; gap:4px; }
.demo-row{ font-family:var(--font-lao); font-size:12px; color:var(--ink-dim); font-weight:700; }
.demo-row.hl{ color:var(--accent2); }
.demo-row.hl b{ color:var(--accent); }
.demo-type{ font-family:var(--font-pixel); font-size:14px; color:var(--accent2); }

.set-row{ display:flex; align-items:center; justify-content:space-between; gap:12px; }
.set-row label{ font-size:14px; font-family:var(--font-lao); font-weight:700; }
.seg{ display:flex; border:3px solid var(--panel-edge); }
.seg-btn{ font-family:var(--font-lao); font-size:9px; padding:8px 10px; cursor:pointer; background:transparent; color:var(--ink); border:none; font-weight:700; }
.seg-btn.on{ background:var(--accent); color:#000; }
input[type=range]{ -webkit-appearance:none; appearance:none; width:130px; height:8px; background:#000; border:2px solid var(--panel-edge); }
input[type=range]::-webkit-slider-thumb{ -webkit-appearance:none; width:16px; height:16px; background:var(--accent); border:2px solid #000; cursor:pointer; }
input[type=range]::-moz-range-thumb{ width:16px; height:16px; background:var(--accent); border:2px solid #000; cursor:pointer; }

/* ---------- ຊັ້ນສອນຫຼິ້ນ (tutorial) ---------- */
.tutorial{ position:absolute; inset:0; z-index:70; display:none; }
.tutorial.open{ display:block; }
.tut-mask{ position:absolute; inset:0; background:rgba(5,2,16,.55); }
.tut-bubble{
  position:absolute; left:50%; bottom:120px; transform:translateX(-50%);
  width:min(340px,86vw); background:var(--bg1); border:3px solid var(--accent);
  box-shadow:var(--shadow); padding:16px; display:flex; flex-direction:column; gap:10px;
  font-size:14px; line-height:1.5; text-align:center; font-family:var(--font-lao); font-weight:700;
}
.tut-arrow{ position:absolute; font-size:30px; color:var(--accent); display:none; animation:arrowBounce .8s ease-in-out infinite; z-index:72; }
@keyframes arrowBounce{ 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(10px);} }

/* ---------- ເອັບເຟັກ feedback ---------- */
.feedback{ position:absolute; inset:0; z-index:65; display:flex; align-items:center; justify-content:center; pointer-events:none; }
.fb-pop{ font-family:var(--font-pixel); font-size:clamp(20px,7vw,44px); text-shadow:3px 3px 0 #000; animation:fbPop .8s ease forwards; }
.fb-pop.good{ color:var(--green); }
.fb-pop.bad{ color:var(--red); }
@keyframes fbPop{ 0%{ transform:scale(.4) translateY(20px); opacity:0;} 30%{ transform:scale(1.1) translateY(0); opacity:1;} 70%{ opacity:1;} 100%{ transform:scale(1) translateY(-40px); opacity:0;} }

.flash{ position:absolute; inset:0; z-index:62; pointer-events:none; opacity:0; }
.flash.good{ background:radial-gradient(circle, rgba(93,255,143,.4), transparent 70%); animation:flashFx .4s; }
.flash.bad{ background:radial-gradient(circle, rgba(255,77,94,.45), transparent 70%); animation:flashFx .4s; }
@keyframes flashFx{ 0%{ opacity:1;} 100%{ opacity:0;} }
.game-frame.shake-screen{ animation:shake .35s; }

.combo-toast{
  position:absolute; left:50%; top:38%; transform:translateX(-50%); z-index:66;
  font-family:var(--font-pixel); font-size:clamp(16px,5vw,28px); color:var(--accent);
  text-shadow:3px 3px 0 #000,0 0 16px var(--accent); pointer-events:none;
  animation:comboToast 1.1s ease forwards;
}
@keyframes comboToast{ 0%{ opacity:0; transform:translateX(-50%) scale(.5);} 25%{ opacity:1; transform:translateX(-50%) scale(1.2);} 75%{ opacity:1;} 100%{ opacity:0; transform:translateX(-50%) scale(1) translateY(-30px);} }

/* ປັບໜ້າຕາ ເມື່ອຈໍແນວນອນ (ຄອມພິວເຕີ/ແທັບເລັດ) ໃຫ້ເໝາະສົມ */
@media (min-aspect-ratio:1/1){
  .question-card{ margin-top:10px; }
  .type-zone{ bottom:18px; }
}