:root {
  --bg: #03101b;
  --panel: rgba(6, 20, 33, .97);
  --panel-2: #081a2a;
  --line: #294965;
  --line-bright: #3c6585;
  --text: #eaf2ff;
  --muted: #8fa3ba;
  --amber: #ffb020;
  --cyan: #31ddfb;
  --green: #4ae9a1;
  --red: #ff6677;
  --font-display: "Rajdhani", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { color-scheme: dark; }
body { margin: 0; min-width: 320px; color: var(--text); background: var(--bg); font-family: var(--font-display); }
button { color: inherit; font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }

.arcade-nav { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 14px clamp(20px, 5vw, 78px); border-bottom: 1px solid rgba(255,176,32,.23); background: rgba(3,17,28,.97); box-shadow: 0 12px 38px rgba(0,0,0,.22); }
.arcade-brand { display: flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; font: 700 14px/1 var(--font-mono); letter-spacing: .19em; }
.arcade-brand img { width: 58px; height: 50px; object-fit: contain; filter: drop-shadow(0 0 9px rgba(49,221,251,.2)); }
.arcade-brand strong { color: var(--amber); }
.all-missions { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 0 14px; border: 1px solid rgba(255,176,32,.45); border-radius: 3px; color: var(--amber); text-decoration: none; font: 700 11px/1 var(--font-mono); letter-spacing: .09em; }
.all-missions:hover { background: rgba(255,176,32,.08); }

.app-stage { min-height: calc(100vh - 82px); padding: clamp(28px,4vw,58px) clamp(10px,3vw,42px) 72px; background: radial-gradient(circle at 50% 0,rgba(28,151,188,.18),transparent 34rem),linear-gradient(rgba(29,78,102,.13) 1px,transparent 1px),linear-gradient(90deg,rgba(29,78,102,.13) 1px,transparent 1px),linear-gradient(180deg,#061723,#020a11 76%); background-size: auto,72px 72px,72px 72px,auto; }
.app { width: min(1640px,100%); margin: 0 auto; }
.app-header { margin-bottom: 28px; text-align: center; }
.mission-id, .panel-kicker { margin: 0; color: var(--amber); font: 700 11px/1.2 var(--font-mono); letter-spacing: .15em; }
.app-header h1 { display: flex; align-items: center; justify-content: center; gap: 18px; margin: 12px 0 9px; color: var(--cyan); font-size: clamp(30px,4.2vw,58px); line-height: 1; letter-spacing: .035em; text-transform: uppercase; }
.brand-hair { width: clamp(24px,5vw,86px); height: 1px; background: linear-gradient(90deg,transparent,var(--cyan)); opacity: .48; }
.brand-hair:last-child { transform: scaleX(-1); }
.subtitle { margin: 0; color: var(--muted); font: 700 11px/1.4 var(--font-mono); letter-spacing: .13em; }

.trainer-modes { width: min(590px,100%); margin: 0 auto 28px; display: grid; grid-template-columns: repeat(2,1fr); gap: 7px; padding: 7px; border: 1px solid var(--line); border-radius: 8px; background: #061522; }
.mode-btn { min-height: 58px; padding: 9px; border: 1px solid transparent; background: transparent; color: var(--muted); font: 700 11px/1.2 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; cursor: pointer; }
.mode-btn.active { color: #111000; border-color: #ffd372; background: linear-gradient(180deg,#ffd06b,#f3a016); box-shadow: 0 0 18px rgba(255,176,32,.25),inset 0 1px rgba(255,255,255,.42); }
button:focus-visible, a:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

.panel { border: 1px solid var(--line); background: var(--panel); box-shadow: inset 0 0 42px rgba(30,96,125,.04),0 20px 55px rgba(0,0,0,.23); }
.workspace { display: grid; grid-template-columns: minmax(580px,1.45fr) minmax(390px,.75fr); gap: 18px; align-items: start; }
.visual-panel, .control-panel, .lesson-panel { padding: clamp(18px,2.2vw,30px); }
.control-panel { min-width: 0; }
.panel-heading { display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; padding-bottom: 17px; border-bottom: 1px solid var(--line); }
.panel-heading h2 { margin: 7px 0 0; font-size: clamp(24px,2vw,32px); line-height: 1.02; }
.heading-badges { flex: none; display: flex; gap: 7px; }
.heading-badges span { padding: 9px 10px; border: 1px solid #345875; color: var(--muted); font: 700 11px/1 var(--font-mono); }
.heading-badges b { color: var(--cyan); }

.visual-grid { display: grid; grid-template-columns: minmax(360px,.82fr) minmax(570px,1.18fr); gap: 14px; margin-top: 18px; }
.canvas-card { position: relative; min-width: 0; overflow: hidden; border: 1px solid #25445f; background: radial-gradient(circle at 50% 45%,rgba(23,81,105,.32),transparent 48%),#04111d; }
.wind-card { min-height: 560px; }
.yoke-card { min-height: 560px; padding: 48px 13px 13px; }
canvas { display: block; width: 100%; height: 100%; touch-action: pan-y pinch-zoom; }
.wind-card > canvas { min-height: 560px; }
.relationship-readout { position: absolute; left: 15px; right: 15px; bottom: 15px; padding: 13px 15px; border-left: 4px solid var(--amber); background: rgba(3,14,23,.91); }
.relationship-readout span, .relationship-readout strong { display: block; }
.relationship-readout span { color: var(--muted); font: 700 11px/1 var(--font-mono); letter-spacing: .08em; }
.relationship-readout strong { margin-top: 7px; color: var(--amber); font: 700 14px/1.25 var(--font-mono); }
.mini-heading { position: absolute; z-index: 2; inset: 13px 13px auto; display: flex; justify-content: space-between; gap: 8px; color: var(--muted); font: 700 11px/1.2 var(--font-mono); }
.mini-heading b { color: var(--cyan); }
.control-visuals { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.control-visual { min-width: 0; padding: 10px; border: 1px solid rgba(60,101,133,.58); background: rgba(3,14,23,.5); }
.control-visual h3 { margin: 0 0 5px; color: var(--muted); font: 700 11px/1.2 var(--font-mono); letter-spacing: .07em; text-align: center; }
.control-visual canvas { height: 355px; }
.control-readout { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 8px; }
.control-readout span { padding: 10px; border: 1px solid #2d4f69; background: rgba(3,14,23,.93); }
.control-readout small, .control-readout b { display: block; font-family: var(--font-mono); }
.control-readout small { color: var(--muted); font-size: 11px; }
.control-readout b { margin-top: 5px; color: var(--cyan); font-size: 11px; line-height: 1.25; }
.surface-summary { display: none; }
.memory-strip { display: grid; grid-template-columns: auto 1fr; gap: 15px; margin-top: 14px; padding: 14px 16px; border-left: 4px solid var(--cyan); background: rgba(49,221,251,.07); }
.memory-strip b { color: var(--cyan); font: 700 11px/1.4 var(--font-mono); }
.memory-strip span { color: #b8c7d7; font-size: 17px; line-height: 1.35; }
.control-panel .mobile-memory { display: none; }

.instruction { margin: 18px 0; color: #b4c3d3; font-size: 17px; line-height: 1.45; }
.angle-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 8px; }
.angle-grid button, .answer-grid button { min-height: 53px; padding: 9px; border: 1px solid #355774; background: #081a2a; color: var(--muted); font: 700 11px/1.25 var(--font-mono); cursor: pointer; }
.angle-grid button:hover, .answer-grid button:hover { border-color: var(--cyan); color: var(--text); }
.angle-grid button.active, .answer-grid button.selected { border-color: var(--amber); color: var(--amber); background: rgba(255,176,32,.08); box-shadow: inset 4px 0 var(--amber); }
.answer-grid button.correct { border-color: var(--green); color: #051910; background: var(--green); box-shadow: none; }
.answer-grid button.incorrect { border-color: var(--red); color: #fff; background: rgba(255,102,119,.22); box-shadow: none; }
.explanation-card { margin-top: 16px; padding: 18px; border: 1px solid #8d621c; background: linear-gradient(135deg,rgba(255,176,32,.1),rgba(255,176,32,.02)); }
.explanation-card > span { color: var(--amber); font: 700 11px/1 var(--font-mono); letter-spacing: .1em; }
.explanation-card strong { display: block; margin: 11px 0 8px; font-size: 21px; line-height: 1.1; }
.explanation-card p { margin: 0; color: #b7c5d4; font-size: 16px; line-height: 1.45; }
.new-btn { flex: none; min-height: 42px; padding: 0 13px; border: 1px solid var(--amber); border-radius: 4px; background: linear-gradient(180deg,#ffd06b,var(--amber)); color: #171000; box-shadow: 0 0 16px rgba(255,176,32,.28); font: 700 11px/1 var(--font-mono); letter-spacing: .06em; cursor: pointer; }
.new-btn::after { content: " \2192"; }

.answer-block { min-width: 0; margin: 16px 0 0; padding: 14px; border: 1px solid #284864; }
.answer-block legend { padding: 0 8px; color: var(--cyan); font: 700 11px/1 var(--font-mono); letter-spacing: .07em; }
.answer-grid { display: grid; gap: 7px; }
.answer-grid.relationship-options { grid-template-columns: repeat(2,1fr); }
.answer-grid.three { grid-template-columns: repeat(3,1fr); }
.answer-grid.two { grid-template-columns: repeat(2,1fr); }
.submit-btn { width: 100%; min-height: 58px; margin-top: 16px; border: 1px solid var(--amber); background: linear-gradient(180deg,#ffd06b,var(--amber)); color: #171000; font: 700 11px/1 var(--font-mono); letter-spacing: .09em; cursor: pointer; }
.submit-btn:disabled { border-color: #30465c; background: #111d29; color: #607286; cursor: not-allowed; }
.feedback { margin-top: 12px; padding: 15px; border-left: 4px solid var(--green); background: rgba(74,233,161,.07); }
.feedback.wrong { border-color: var(--red); background: rgba(255,102,119,.07); }
.feedback strong { display: block; color: var(--green); font: 700 12px/1 var(--font-mono); }
.feedback.wrong strong { color: var(--red); }
.feedback p { margin: 8px 0 0; color: #b4c3d3; font-size: 16px; line-height: 1.4; }
.progress-strip { display: grid; grid-template-columns: repeat(4,1fr); margin-top: 12px; border: 1px solid var(--line); }
.progress-strip span { padding: 11px 5px; border-right: 1px solid var(--line); text-align: center; }
.progress-strip span:last-child { border: 0; }
.progress-strip small, .progress-strip b { display: block; font-family: var(--font-mono); }
.progress-strip small { color: var(--muted); font-size: 11px; }
.progress-strip b { margin-top: 5px; color: var(--cyan); font-size: 13px; }

.lesson-panel { margin-top: 18px; }
.scope-badge { align-self: center; color: var(--cyan); font: 700 11px/1.3 var(--font-mono); letter-spacing: .07em; text-align: right; }
.lesson-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 11px; margin-top: 18px; }
.lesson-grid article { min-height: 160px; padding: 17px; border: 1px solid var(--line); background: #071725; }
.lesson-grid article > span { color: var(--amber); font: 700 11px/1 var(--font-mono); }
.lesson-grid strong { display: block; margin: 11px 0 7px; font-size: 20px; line-height: 1.1; }
.lesson-grid p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.42; }
.source-note { margin: 17px 0 0; color: #7f94ab; font-size: 13px; line-height: 1.5; }
.source-note strong { color: #acbdcf; font: 700 11px/1 var(--font-mono); letter-spacing: .05em; }

@media (max-width: 1220px) {
  .workspace { grid-template-columns: 1fr; }
  .visual-panel { grid-row: 1; }
  .control-panel { grid-row: 2; }
}
@media (max-width: 1060px) {
  .visual-grid { grid-template-columns: 1fr; }
  .wind-card { min-height: 420px; }
  .wind-card > canvas { min-height: 420px; }
}
@media (max-width: 820px) {
  .arcade-nav { min-height: 68px; padding: 10px 16px; }
  .arcade-brand img { width: 45px; height: 40px; }
  .arcade-brand { font-size: 11px; }
  .app-stage { padding: 24px 10px 50px; }
  .app-header h1 { align-items: flex-start; }
  .brand-hair { display: none; }
  .wind-card { min-height: 360px; }
  .wind-card > canvas { min-height: 360px; }
  .yoke-card { min-height: 0; }
  .lesson-grid { grid-template-columns: repeat(2,1fr); }
  .heading-badges { flex-direction: column; }
}
@media (max-width: 560px) {
  .all-missions { padding: 0 9px; }
  .app-stage { padding-top: 14px; }
  .app-header { margin-bottom: 14px; }
  .app-header h1 { margin-block: 8px 5px; font-size: 29px; }
  .app-header .subtitle { display: none; }
  .trainer-modes { margin-bottom: 12px; padding: 4px; }
  .mode-btn { min-height: 46px; }
  .visual-panel, .control-panel, .lesson-panel { padding: 10px; }
  .visual-panel { grid-row: 1; }
  .control-panel { grid-row: 2; }
  .panel-heading { flex-direction: column; }
  .visual-panel > .panel-heading { gap: 8px; padding-bottom: 9px; }
  .visual-panel > .panel-heading h2 { margin-top: 4px; font-size: 22px; }
  .heading-badges { width: 100%; display: grid; grid-template-columns: repeat(2,1fr); }
  .heading-badges span { padding: 7px; text-align: center; }
  .visual-grid { gap: 8px; margin-top: 9px; }
  .wind-card, .wind-card > canvas { min-height: 240px; height: 240px; }
  .relationship-readout { left: 8px; right: 8px; bottom: 8px; padding: 8px 10px; }
  .relationship-readout strong { margin-top: 4px; font-size: 12px; }
  .yoke-card { padding: 38px 6px 6px; }
  .mode-challenge .yoke-card { display: none; }
  .control-visuals { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .control-visual { padding: 5px; }
  .control-visual canvas { height: 200px; }
  .response-visual { display: block; }
  .response-visual canvas { height: 200px; }
  .control-readout { grid-template-columns: repeat(2,1fr); }
  .control-readout span { padding: 8px; }
  .control-readout .surface-summary { display: block; grid-column: 1 / -1; }
  .visual-panel > .memory-strip { display: none; }
  .control-panel .mobile-memory { display: grid; grid-template-columns: 1fr; gap: 5px; padding: 10px 12px; }
  .control-panel .panel-heading { flex-direction: row; align-items: center; padding-bottom: 10px; }
  .control-panel .panel-heading h2 { font-size: 23px; }
  .instruction { margin: 10px 0 12px; font-size: 16px; line-height: 1.35; }
  .angle-grid, .answer-grid.relationship-options { grid-template-columns: repeat(2,1fr); }
  .angle-grid button, .answer-grid button { min-height: 44px; padding-block: 7px; }
  .answer-block { margin-top: 10px; padding: 9px; }
  .answer-grid.three { grid-template-columns: repeat(3,1fr); }
  .answer-grid button { padding-inline: 5px; }
  .submit-btn { min-height: 50px; margin-top: 10px; }
  .progress-strip { grid-template-columns: repeat(4,1fr); }
  .progress-strip span { padding: 8px 3px; }
  .lesson-grid { grid-template-columns: 1fr; }
}
@media (max-width: 340px) {
  .control-visuals { grid-template-columns: 1fr; }
  .control-visual canvas { height: 180px; }
  .response-visual canvas { height: 190px; }
}