/* VoltX Trainer — dark "circuit board" game theme, iPad-first. */
:root {
  --bg: #0b1020; --bg2: #121a33; --card: #172142; --card2: #1e2a52; --line: #2b3a6b;
  --text: #eaf0ff; --dim: #9aa8d6; --accent: #ffd23f; --accent2: #3fe0ff; --good: #3ddc84; --bad: #ff5c7a;
  --hi: #ffd23f; --lo: #4a5a8f; --wire: #5e6fa8;
  --r: 18px; --tap: 52px;
  --font: 'IBM Plex Sans Thai', system-ui, -apple-system, 'Sukhumvit Set', sans-serif;
  --mono: 'JetBrains Mono', 'IBM Plex Sans Thai', ui-monospace, Menlo, monospace;
  color-scheme: dark;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100dvh; background: var(--bg); color: var(--text); font: 17px/1.6 var(--font);
}
/* iOS Safari ignores background-attachment: fixed, so the glow lives on a fixed layer */
body::before { content: ''; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(circle at 20% 0%, #1b2a5c 0, transparent 45%), radial-gradient(circle at 100% 100%, #2a1b4f 0, transparent 40%); }
button { font: inherit; color: inherit; touch-action: manipulation; user-select: none; -webkit-user-select: none; cursor: pointer; }
button:disabled { cursor: default; }
.app { max-width: 920px; margin: 0 auto; padding: 0 max(16px, env(safe-area-inset-right)) calc(40px + env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left)); }
.loading { text-align: center; padding: 30vh 0; color: var(--dim); }
.mono { font-family: var(--mono); letter-spacing: .02em; }
.center { text-align: center; } .big { font-size: 1.2em; } .dim { color: var(--dim); }
sub { font-size: .7em; }

/* ---------- HUD ---------- */
.hud { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 10px; padding: calc(10px + env(safe-area-inset-top)) 0 10px;
  background: linear-gradient(var(--bg) 70%, transparent); }
.logo { font-weight: 700; font-size: 1.25rem; color: var(--accent); text-shadow: 0 0 12px #ffd23f66; }
.hud-title { flex: 1; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hud-stats { display: flex; gap: 6px; }
.pill { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; font-size: .9rem; font-weight: 600; white-space: nowrap; }
.icon-btn { width: var(--tap); height: 44px; border-radius: 14px; border: 1px solid var(--line); background: var(--card); font-size: 1.8rem; line-height: 1; }

/* ---------- player card ---------- */
.player { display: flex; align-items: center; gap: 16px; background: linear-gradient(135deg, var(--card2), var(--card)); border: 1px solid var(--line);
  border-radius: var(--r); padding: 16px 18px; margin-top: 4px; box-shadow: 0 10px 30px #0006; }
.avatar { width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; font-size: 2rem; background: radial-gradient(#ffe68a, #f5a300); box-shadow: 0 0 22px #ffd23f88; flex: none; }
.p-main { flex: 1; min-width: 0; }
.p-name { font-size: 1.3rem; font-weight: 700; }
.p-rank { color: var(--accent2); font-weight: 600; }
.xpbar { height: 12px; background: #0008; border-radius: 99px; overflow: hidden; margin-top: 6px; border: 1px solid var(--line); }
.xpbar > div { height: 100%; background: linear-gradient(90deg, var(--accent2), var(--accent)); border-radius: 99px; transition: width .6s; }
.xp-t { font-size: .8rem; color: var(--dim); }
.countdown { text-align: center; background: #0006; border-radius: 14px; padding: 6px 12px; border: 1px solid var(--line); }
.countdown b { display: block; font-size: 1.8rem; line-height: 1.1; color: var(--accent); }
.countdown span { font-size: .75rem; color: var(--dim); }
.countdown.soon b { color: var(--bad); }

.banner { display: flex; gap: 10px; align-items: center; margin: 14px 0; padding: 12px 14px; border-radius: 14px; background: #3fe0ff1a; border: 1px solid #3fe0ff55; font-size: .95rem; }
.share-ico { display: inline-block; border: 1px solid var(--accent2); border-radius: 6px; padding: 0 5px; }
.sec { font-size: 1.1rem; margin: 26px 0 10px; color: var(--dim); font-weight: 600; letter-spacing: .02em; }

/* ---------- map path ---------- */
.path { position: relative; display: grid; gap: 14px; padding: 6px 0; }
.path::before { content: ''; position: absolute; left: 50%; top: 20px; bottom: 20px; width: 4px; transform: translateX(-50%);
  background: repeating-linear-gradient(var(--accent2) 0 10px, transparent 10px 18px); opacity: .35; border-radius: 4px; }
.node { position: relative; display: flex; align-items: center; gap: 14px; width: min(78%, 520px); min-height: 84px; padding: 12px 16px; text-align: left;
  border-radius: var(--r); border: 2px solid var(--line); background: var(--card); box-shadow: 0 6px 0 #0a1230, 0 10px 24px #0005; transition: transform .1s; }
.node.l { justify-self: start; } .node.r { justify-self: end; }
.node:active:not(:disabled) { transform: translateY(4px); box-shadow: 0 2px 0 #0a1230; }
.node.locked { background: #121933; box-shadow: none; } .node.locked > * { opacity: .5; filter: grayscale(.6); }
.node.gold { border-color: var(--accent); box-shadow: 0 6px 0 #6b5400, 0 0 24px #ffd23f55; }
.node.boss { justify-self: center; width: min(86%, 560px); border-color: #b06cff; background: linear-gradient(135deg, #2a1b4f, var(--card)); }
.node-ico { font-size: 2.2rem; width: 56px; height: 56px; display: grid; place-items: center; background: #0006; border-radius: 16px; flex: none; }
.node-txt { display: flex; flex-direction: column; line-height: 1.35; min-width: 0; }
.node-txt b { font-size: 1.1rem; } .node-txt small { color: var(--dim); }
.node-stars { color: var(--accent); font-size: .95rem; letter-spacing: .05em; margin-top: 2px; }
.node.locked .node-stars { color: var(--dim); font-size: .8rem; letter-spacing: 0; }

.quick { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 26px; }
.card-btn { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; min-height: 110px; text-align: left; padding: 14px; border-radius: var(--r);
  background: var(--card); border: 1px solid var(--line); }
.card-btn span { font-size: 1.6rem; } .card-btn small { color: var(--dim); font-size: .82rem; line-height: 1.35; }
.card-btn:disabled { opacity: .5; }
.foot { margin-top: 30px; text-align: center; font-size: .8rem; color: var(--dim); }

/* ---------- stage hub ---------- */
.stage-head h1 { margin: 6px 0 0; font-size: 1.7rem; } .stage-head p { margin: 0 0 8px; color: var(--dim); }
.vid { display: inline-block; padding: 10px 16px; border-radius: 12px; background: #ff3b3b22; border: 1px solid #ff5c5c66; color: #ffb3b3; text-decoration: none; font-weight: 600; }
.note { background: #ffd23f14; border: 1px dashed #ffd23f66; border-radius: 12px; padding: 10px 12px; font-size: .92rem; }
.levels { display: grid; gap: 12px; margin-top: 18px; }
.lvl { display: flex; align-items: center; gap: 14px; min-height: 76px; padding: 12px 16px; border-radius: var(--r); background: var(--card); border: 2px solid var(--line); text-align: left; }
.lvl > span:nth-child(2) { flex: 1; display: flex; flex-direction: column; line-height: 1.35; } .lvl small { color: var(--dim); }
.lvl-ico { font-size: 1.8rem; width: 48px; text-align: center; }
.lvl-r { font-size: 1.2rem; } .lvl-r.stars { color: var(--accent); letter-spacing: .08em; }
.lvl.prime { background: linear-gradient(135deg, #1b3a4f, var(--card)); }
.lvl.now { border-color: var(--accent2); box-shadow: 0 0 0 4px #3fe0ff22; animation: pulse 2s infinite; }
.lvl.done { border-color: var(--good); }
.lvl.locked { opacity: .5; }
@keyframes pulse { 50% { box-shadow: 0 0 0 8px #3fe0ff10; } }

/* ---------- lesson ---------- */
.dots { display: flex; gap: 6px; justify-content: center; margin: 4px 0 12px; flex-wrap: wrap; }
.dots span { width: 10px; height: 10px; border-radius: 50%; background: var(--line); font-size: 0; }
.dots .seen { background: var(--accent2); opacity: .6; } .dots .cur { background: var(--accent); width: 26px; border-radius: 6px; }
.dots .chk { width: auto; height: auto; background: none; font-size: .8rem; color: var(--dim); line-height: 10px; }
.lesson { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 20px; }
.lesson h2 { margin: 0 0 8px; color: var(--accent); }
.lesson p { margin: .5em 0; } .lesson ul { padding-left: 1.3em; margin: .4em 0; } .lesson li { margin: .2em 0; }
.tip { background: #3ddc8414; border-left: 4px solid var(--good); padding: 8px 12px; border-radius: 8px; }
.warn { background: #ff5c7a14; border-left: 4px solid var(--bad); padding: 8px 12px; border-radius: 8px; }
.warn-inline { color: #ffb3c1; }
.src { font-size: .78rem; color: var(--dim); }
.pager { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 16px; position: sticky; bottom: 0;
  padding: 10px 0 calc(10px + env(safe-area-inset-bottom)); background: linear-gradient(transparent, var(--bg) 35%); }
.pg { color: var(--dim); }
table.nice { border-collapse: collapse; margin: 8px 0; width: 100%; }
table.nice td, table.nice th { border: 1px solid var(--line); padding: 6px 10px; }
table.nice th { background: var(--card2); }

/* ---------- widgets ---------- */
.widget:not(:empty) { margin-top: 14px; padding: 14px; background: #0b1230; border: 1px solid var(--line); border-radius: 14px; }
.play { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; }
.play-svg { flex: 1 1 220px; max-width: 320px; }
.sws { display: flex; gap: 8px; flex-wrap: wrap; } .sws.col { flex-direction: column; } .sws.col > div { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.sw { min-width: var(--tap); height: var(--tap); padding: 0 10px; border-radius: 14px; border: 2px solid var(--lo); background: #121a33;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; font-weight: 700; transition: all .12s; }
.sw .sw-l { color: var(--dim); font-size: .85rem; } .sw .sw-v { font-family: var(--mono); font-size: 1.25rem; }
.sw.on { border-color: var(--hi); background: #3a2f00; box-shadow: 0 0 14px #ffd23f55; } .sw.on .sw-v { color: var(--hi); }
.sw.big { min-width: 58px; height: 62px; }
.picked .sw { outline: 3px solid var(--accent2); outline-offset: 2px; }
.leds { display: flex; gap: 10px; }
.ledbox { display: flex; flex-direction: column; align-items: center; font-size: .82rem; color: var(--dim); min-width: 52px; }
.led { width: 44px; height: 56px; }
.led-body { fill: #3a1420; stroke: #000; stroke-width: 2; }
.led-red.led-on .led-body { fill: #ff4d6a; } .led-red .led-glow { fill: #ff4d6a33; }
.led-green .led-body { fill: #123a26; } .led-green.led-on .led-body { fill: #3ddc84; } .led-green .led-glow { fill: #3ddc8433; }
.led-amber .led-body { fill: #3a2c0a; } .led-amber.led-on .led-body { fill: #ffd23f; } .led-amber .led-glow { fill: #ffd23f33; }
.led-txt { fill: var(--dim); font-size: 10px; }
.seg-tabs { display: flex; gap: 6px; margin-bottom: 10px; justify-content: center; } .seg-tabs.wrap { flex-wrap: wrap; }
.tab { min-height: 42px; padding: 0 14px; border-radius: 12px; background: var(--card); border: 1px solid var(--line); font-weight: 600; font-size: .9rem; }
.tab.sel { background: var(--accent2); color: #001; border-color: var(--accent2); }
.readout { text-align: center; margin-top: 8px; font-size: 1.05rem; } .readout b { color: var(--accent); font-size: 1.3em; }
.hint { color: var(--dim); font-size: .85rem; text-align: center; margin: 6px 0 0; }
.goal { text-align: center; margin-bottom: 8px; } .goal.hit { color: var(--good); }
.bitrow { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; }
.bitcol { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.pv { font-size: .75rem; color: var(--dim); font-family: var(--mono); }
.mini { min-height: 40px; padding: 0 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--card2); font-size: .9rem; }
.row-btns { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-top: 8px; }
.eqn { font-size: 1.1rem; }
.col-c { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.big-btn { min-height: 60px; padding: 0 20px; border-radius: 16px; border: 2px solid var(--accent2); background: #0f3446; font-weight: 700; font-size: 1.05rem; }
.big-btn:active, .big-btn.down { transform: translateY(2px); background: #145066; }
.small-eq { font-size: .85rem; line-height: 1.5; }
.ripple { display: grid; gap: 6px; justify-content: center; }
.rp-row { display: flex; gap: 6px; align-items: center; } .rp-l { width: 64px; text-align: right; color: var(--dim); font-size: .85rem; }
.rp-c, .rp-s { width: var(--tap); height: 36px; display: grid; place-items: center; font-family: var(--mono); border-radius: 10px; }
.rp-c { color: var(--dim); border: 1px dashed var(--line); } .rp-c.on { color: var(--accent); border-color: var(--accent); }
.rp-s { background: #0b2a1c; color: var(--good); font-weight: 700; }
.rp-row.sum { border-top: 2px solid var(--line); padding-top: 6px; }
.shift { display: flex; align-items: center; justify-content: center; gap: 4px; margin-top: 12px; flex-wrap: wrap; }
.ff { width: 64px; height: 64px; border-radius: 12px; border: 2px solid var(--line); display: grid; place-items: center; line-height: 1.1; }
.ff small { color: var(--dim); font-size: .7rem; } .ff b { font-family: var(--mono); font-size: 1.4rem; } .ff.on { border-color: var(--hi); } .ff.on b { color: var(--hi); }
.arrow { color: var(--dim); }
.vm-scale { display: flex; gap: 4px; justify-content: center; flex-wrap: wrap; }
.vm-b { min-width: 46px; height: 46px; border-radius: 10px; border: 2px solid transparent; font-family: var(--mono); font-weight: 700; }
.vm-b.lo { background: #1a2550; } .vm-b.hi { background: #4a3a00; } .vm-b.undef { background: repeating-linear-gradient(45deg, #2a2a3a 0 6px, #1a1a28 6px 12px); color: var(--dim); }
.vm-b.sel { border-color: #fff; transform: scale(1.1); }
.vm-read { text-align: center; margin-top: 10px; font-size: 1.15rem; } .vm-read.hi b { color: var(--hi); } .vm-read.lo b { color: var(--accent2); } .vm-read.undef b { color: var(--bad); }
.chip-desc { text-align: center; margin-bottom: 6px; }

/* ---------- svg ---------- */
.diagram, .timing, .dip { width: 100%; height: auto; display: block; }
.diagram { max-width: 420px; margin: 0 auto; }
.timing { max-width: 640px; margin: 8px auto 0; }
.dip { max-width: 440px; margin: 0 auto; }
.gate { fill: #1d2a55; stroke: #cfe0ff; stroke-width: 2.4; stroke-linejoin: round; }
.gate-line { fill: none; }
.w { stroke: var(--wire); stroke-width: 3; stroke-linecap: round; }
.w-on { stroke: var(--hi); filter: drop-shadow(0 0 3px #ffd23f99); } .w-off { stroke: #4a5a8f; }
.lbl { fill: var(--text); font: 600 14px var(--font); }
.val { font: 700 12px var(--mono); } .val-on { fill: var(--hi); } .val-off { fill: var(--dim); }
.block { fill: #1d2a55; stroke: #cfe0ff; stroke-width: 2; } .block-t { fill: var(--text); font: 700 14px var(--font); }
.seg { stroke: #0006; stroke-width: 1; transition: fill .12s; } .seg-off { fill: #2a1520; } .seg-on { fill: #ff4d6a; filter: drop-shadow(0 0 4px #ff4d6aaa); }
.seg-tap { cursor: pointer; } .seg-lbl { fill: var(--dim); font: 600 11px var(--mono); }
.sevenseg { width: 110px; height: auto; } .sevenseg.small { width: 76px; }
.segin { display: flex; justify-content: center; } .segin .sevenseg { width: 170px; }
.seg-compare { display: flex; gap: 24px; justify-content: center; margin-top: 10px; text-align: center; font-size: .85rem; color: var(--dim); }
.seg-compare .sevenseg { display: block; margin: 4px auto; }
.wave { stroke: var(--accent2); stroke-width: 2.4; } .wave-clk { stroke: #b06cff; } .wave-unk { fill: #ffffff14; }
.edge-mark { stroke: #b06cff; stroke-width: 2; fill: none; } .tick-no { fill: var(--dim); font: 10px var(--mono); }
.guide { stroke: #ffffff30; stroke-dasharray: 3 4; }
.chip { fill: #222; stroke: #555; stroke-width: 2; } .chip-notch { fill: #444; } .chip-name { fill: #ddd; font: 700 16px var(--mono); }
.pin { fill: #bbb; } .pin-hl { fill: var(--accent); }
.pin-no { fill: #999; font: 10px var(--mono); } .pin-name { fill: var(--text); font: 600 12px var(--mono); } text.pin-hl, .pin-name.pin-hl { fill: var(--accent); }
.ovl { text-decoration: overline; }

/* ---------- truth tables ---------- */
.tt { border-collapse: collapse; margin: 8px auto; font-family: var(--mono); }
.tt th, .tt td { border: 1px solid var(--line); padding: 4px 12px; text-align: center; min-width: 40px; }
.tt th { background: var(--card2); } .tt .out { background: #3a2f0022; color: var(--accent); font-weight: 700; }
.tt.small td, .tt.small th { padding: 2px 10px; }
.tt tr.hl td { background: #3fe0ff26; }
.tt.input td { padding: 3px 8px; }
.cell { min-width: 58px; height: 46px; border-radius: 10px; border: 2px solid var(--lo); background: #121a33; font: 700 1.15rem var(--mono); }
.cell.on { border-color: var(--hi); color: var(--hi); } .cell.empty { color: var(--dim); border-style: dashed; }

/* ---------- play ---------- */
.runbar { position: sticky; top: 64px; z-index: 9; background: var(--bg); padding-bottom: 8px; }
.prog { height: 12px; background: var(--card); border-radius: 99px; overflow: hidden; border: 1px solid var(--line); }
.prog > div { height: 100%; background: linear-gradient(90deg, var(--good), var(--accent2)); transition: width .4s; }
.run-stats { display: flex; justify-content: space-between; align-items: center; margin-top: 6px; min-height: 30px; }
.hearts { font-size: 1.2rem; letter-spacing: 2px; }
.combo { font-weight: 700; color: var(--dim); } .combo.hot { color: var(--accent); text-shadow: 0 0 10px #ffd23f88; }
.qcard { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 20px; margin-top: 6px; }
.qcard.shake { animation: shake .35s; }
@keyframes shake { 20%, 60% { transform: translateX(-8px); } 40%, 80% { transform: translateX(8px); } }
.qnum { color: var(--dim); font-size: .85rem; }
.prompt { font-size: 1.15rem; font-weight: 600; margin: 4px 0 10px; }
.prompt .stack { display: inline-block; white-space: pre; text-align: right; font-size: 1.3rem; margin-top: 6px; }
.visual { margin: 8px 0 12px; display: flex; justify-content: center; }
.visual > * { max-width: 100%; }
.answer { margin-top: 8px; }
.opts { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.opts.two .opt { font-size: 1.6rem; }
.opt { min-height: 64px; padding: 10px 14px; border-radius: 14px; border: 2px solid var(--line); background: var(--card2); font-size: 1.05rem; font-weight: 600; text-align: center; }
.opt.sel { border-color: var(--accent2); background: #0f3446; box-shadow: 0 0 0 3px #3fe0ff33; }
.opt.right, .sw.right, .cell.right { border-color: var(--good) !important; background: #0b2a1c !important; color: var(--good); }
.opt.wrong, .sw.wrong, .cell.wrong { border-color: var(--bad) !important; background: #3a0f1a !important; color: var(--bad); }
.numdisp { min-height: 64px; font-size: 2rem; text-align: center; border-radius: 14px; background: #0b1230; border: 2px solid var(--line); padding: 6px; margin-bottom: 10px; }
.numdisp.right { border-color: var(--good); color: var(--good); } .numdisp.wrong { border-color: var(--bad); color: var(--bad); }
.keypad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; max-width: 380px; margin: 0 auto; }
.keypad.hex { grid-template-columns: repeat(5, 1fr); max-width: 480px; }
.key { height: 60px; border-radius: 14px; border: 1px solid var(--line); background: var(--card2); font: 700 1.4rem var(--mono); }
.key:active { background: var(--accent2); color: #001; }
.actions { margin-top: 14px; }
.btn { min-height: var(--tap); padding: 0 22px; border-radius: 14px; border: none; background: var(--accent); color: #1a1400; font-weight: 700; font-size: 1.05rem;
  box-shadow: 0 4px 0 #a38400; }
.btn:active:not(:disabled) { transform: translateY(3px); box-shadow: 0 1px 0 #a38400; }
.btn:disabled { opacity: .4; }
.btn.big { width: 100%; min-height: 60px; font-size: 1.2rem; }
.btn.ghost { background: var(--card); color: var(--text); box-shadow: 0 4px 0 #0a1230; border: 1px solid var(--line); }
.btn.danger { background: var(--bad); color: #fff; box-shadow: 0 4px 0 #8a1f33; }
.feedback { margin-top: 12px; border-radius: var(--r); padding: 16px 18px; border: 2px solid; animation: rise .25s; }
.feedback.ok { border-color: var(--good); background: #0b2a1c; } .feedback.no { border-color: var(--bad); background: #2a0d16; }
.fb-h { font-size: 1.3rem; font-weight: 700; } .fb-ans { margin: 6px 0; } .fb-ex { margin: 8px 0 12px; line-height: 1.6; }
@keyframes rise { from { transform: translateY(12px); opacity: 0; } }

/* ---------- result ---------- */
.result { text-align: center; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 26px 20px; margin-top: 20px; }
.r-ico { font-size: 4rem; animation: pop .5s; } .result h1 { margin: 6px 0; }
.bigstars { font-size: 3rem; color: var(--accent); letter-spacing: .1em; text-shadow: 0 0 18px #ffd23f88; }
.r-btns { display: grid; gap: 10px; margin-top: 18px; }
@keyframes pop { 0% { transform: scale(.3); } 70% { transform: scale(1.15); } }

/* ---------- profile / settings ---------- */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stats-grid > div { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 12px; text-align: center; display: flex; flex-direction: column; }
.stats-grid b { font-size: 1.4rem; color: var(--accent); } .stats-grid small { color: var(--dim); }
.badges { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.badge { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 12px; text-align: center; display: flex; flex-direction: column; opacity: .4; filter: grayscale(1); }
.badge.got { opacity: 1; filter: none; border-color: var(--accent); }
.badge span { font-size: 2rem; } .badge small { color: var(--dim); font-size: .8rem; }
.topics { display: grid; gap: 8px; }
.topic { display: grid; grid-template-columns: 1fr 1fr auto; gap: 10px; align-items: center; font-size: .92rem; }
.tbar { height: 10px; background: var(--card); border-radius: 99px; overflow: hidden; }
.tbar div { height: 100%; } .tbar .low { background: var(--bad); } .tbar .mid { background: var(--accent); } .tbar .hi { background: var(--good); }
.form { display: grid; gap: 12px; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 16px; }
.form label { display: grid; gap: 4px; font-weight: 600; } .form label.row { display: flex; align-items: center; gap: 10px; }
.form input:not([type=checkbox]), .form textarea { font: inherit; font-size: 16px; color: var(--text); background: #0b1230; border: 1px solid var(--line); border-radius: 12px; padding: 12px; width: 100%; }
.form input[type=checkbox] { width: 26px; height: 26px; }
.form p { margin: 0; }

#toasts { position: fixed; left: 50%; top: calc(14px + env(safe-area-inset-top)); transform: translateX(-50%); z-index: 50; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast { background: var(--card2); border: 2px solid var(--accent); padding: 12px 20px; border-radius: 16px; box-shadow: 0 10px 30px #000a;
  transition: transform .35s, opacity .35s; transform: translateY(-30px); opacity: 0; text-align: center; max-width: 90vw; }
.toast.show { transform: none; opacity: 1; } .toast.big { font-size: 1.3rem; } .toast.badge { border-color: #b06cff; }

/* ---------- narrow screens (iPad split view / phones) ---------- */
@media (max-width: 640px) {
  body { font-size: 16px; }
  .node { width: 100%; } .node.l, .node.r { justify-self: stretch; }
  .path::before { display: none; }
  .quick { grid-template-columns: 1fr; } .card-btn { min-height: 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .opts { grid-template-columns: 1fr; } .opts.two { grid-template-columns: 1fr 1fr; }
  .player { flex-wrap: wrap; } .topic { grid-template-columns: 1fr 80px auto; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }