*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0d1117;
  --surface: #161b27;
  --surface2: #1f2535;
  --border: #2a3050;
  --accent: #00897b;
  --accent-lo: rgba(0,137,123,.22);
  --green: #3ddc84;
  --red: #ff5555;
  --gold: #f5c842;
  --text: #dde3f0;
  --text-dim: #6b7a99;
  --font: 'Segoe UI', system-ui, sans-serif;
  --mono: 'Courier New', monospace;
  --radius: 12px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  min-height: 100vh;
  padding: 18px 18px 60px;
  line-height: 1.5;
}

#app { max-width: 1320px; margin: 0 auto; }

header { text-align: center; margin: 20px 0 18px; }
header h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  background: linear-gradient(120deg, var(--accent) 0%, #4dd0c1 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 6px;
}
.subtitle { color: var(--text-dim); font-size: .95rem; }

/* ── Controls bar ── */
.controls-bar {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px 14px; margin-bottom: 14px;
}
.ctrl-group { display: flex; align-items: center; gap: 8px; }
.ctrl-label { font-size: .8rem; color: var(--text-dim); font-weight: 600; }
.pill-tabs {
  display: inline-flex; background: var(--surface2); border-radius: 8px;
  padding: 3px; gap: 2px;
}
.pill {
  background: transparent; border: none; color: var(--text-dim);
  padding: 6px 14px; border-radius: 6px; cursor: pointer;
  font-size: .82rem; font-weight: 600; transition: all .15s;
}
.pill:hover { color: var(--text); }
.pill.active { background: var(--accent); color: #fff; box-shadow: 0 0 8px var(--accent-lo); }

/* ── Lab procedure ── */
.lab-procedure {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px 14px; margin-bottom: 14px;
}
.lab-steps {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 8px;
}
.lab-step {
  display: flex; align-items: center; gap: 8px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 10px; font-size: .78rem;
  transition: all .2s;
}
.lab-step.active { border-color: var(--accent); background: var(--accent-lo); animation: stepPulse 1.8s ease-in-out infinite; }
@keyframes stepPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0,137,123,0.4); }
  50% { box-shadow: 0 0 0 6px rgba(0,137,123,0); }
}
.lab-step.done { border-color: var(--green); }
.lab-step.done .lab-step-num { background: var(--green); color: #0d1117; }
.lab-step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--border); color: var(--text); font-weight: 700;
  font-size: .72rem; flex-shrink: 0;
}
.lab-step.active .lab-step-num { background: var(--accent); color: #fff; }
.lab-step-text { color: var(--text); font-weight: 500; }

/* ── Dual canvas ── */
.dual-canvas-row {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 14px; margin-bottom: 14px;
}
.canvas-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px;
  overflow-x: clip; position: relative;
}
.canvas-card canvas {
  width: 100%; height: auto; display: block;
  background: #07090d; border-radius: 8px;
  touch-action: none;
}

/* ── Chart tabs ── */
.chart-tabs {
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
  margin-top: 8px; padding: 6px 10px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px;
}
.chart-tabs-label {
  font-size: .7rem; color: var(--text-dim); font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em;
  margin-right: 6px;
}
.chart-tab {
  background: transparent; border: 1px solid var(--border);
  color: var(--text-dim); border-radius: 6px; padding: 4px 10px;
  font-size: .76rem; font-weight: 600; cursor: pointer;
  transition: all .15s;
}
.chart-tab:hover { color: var(--text); border-color: var(--accent); }
.chart-tab.active {
  background: var(--accent); color: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 6px var(--accent-lo);
}

/* ── Readout badges ── */
.readout-badges {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px;
}
.readout-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 18px; padding: 5px 12px;
  font-size: .78rem; color: var(--text-dim);
}
.readout-badge strong {
  color: var(--text); font-family: var(--mono); font-weight: 700;
}
.rb-dot {
  width: 8px; height: 8px; border-radius: 50%;
  display: inline-block;
}

/* ── Control panel ── */
.ctrl-panel {
  margin-top: 10px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 12px;
}
.cp-title {
  display: block; font-size: .72rem; color: var(--text-dim);
  font-weight: 700; text-transform: uppercase; letter-spacing: .05em;
  margin-bottom: 8px;
}
.cp-actions {
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
  margin-bottom: 10px;
}
.cp-btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 11px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text);
  font-size: .78rem; font-weight: 600; cursor: pointer;
  transition: all .15s;
}
.cp-btn:hover { background: var(--accent-lo); border-color: var(--accent); }
.cp-btn:active { transform: scale(0.94); filter: brightness(1.3); }
.cp-btn:disabled,
.cp-btn.disabled-look {
  opacity: .4; cursor: not-allowed;
  background: var(--surface) !important;
  color: var(--text-dim) !important;
  border-color: var(--border) !important;
  box-shadow: none !important;
  filter: grayscale(.6);
}
.cp-btn:disabled:hover,
.cp-btn.disabled-look:hover { transform: none; filter: grayscale(.6); }
.cp-btn.disabled-look::before { display: none; }   /* kill idle-pulse when looks disabled */
.cp-mount { background: var(--accent); color: #fff; border-color: var(--accent); }
.cp-mount:hover { filter: brightness(1.1); }
.cp-start {
  background: var(--green); color: #0d1117; border-color: var(--green);
  position: relative; overflow: hidden;
}
.cp-start:hover { filter: brightness(1.15); box-shadow: 0 0 12px rgba(61,220,132,0.5); }
.cp-start:not(:disabled)::before {
  /* idle pulse: subtle ring so the user knows it's actionable */
  content: ''; position: absolute; inset: 0; border-radius: inherit;
  box-shadow: 0 0 0 0 rgba(61,220,132,0.6);
  animation: btnIdlePulse 2.2s ease-out infinite;
  pointer-events: none;
}
@keyframes btnIdlePulse {
  0%   { box-shadow: 0 0 0 0 rgba(61,220,132,0.55); }
  60%  { box-shadow: 0 0 0 10px rgba(61,220,132,0); }
  100% { box-shadow: 0 0 0 0 rgba(61,220,132,0); }
}
/* Flash burst when clicked */
.cp-btn.flash-confirm {
  animation: btnFlashConfirm .65s ease-out;
}
@keyframes btnFlashConfirm {
  0%   { background: #fff;          box-shadow: 0 0 0 0 rgba(245,200,66,0.9); transform: scale(1); }
  20%  { background: #fff58a;       box-shadow: 0 0 0 14px rgba(245,200,66,0); transform: scale(1.06); }
  100% { background: var(--green);  box-shadow: 0 0 0 0 rgba(245,200,66,0); transform: scale(1); }
}
.cp-reset { background: var(--surface); }
.cp-icon { font-size: .9rem; }
.cp-sep { width: 1px; height: 22px; background: var(--border); }
.cp-sep-h { height: 1px; background: var(--border); margin: 8px 0; }
.cp-config { display: flex; flex-direction: column; gap: 4px; }
.cp-field { display: flex; flex-direction: column; gap: 4px; }
.cp-label { font-size: .72rem; color: var(--text-dim); font-weight: 600; }
.cp-params {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
}

/* ── Material pills (engine selector) ── */
.mat-strip { display: flex; flex-wrap: wrap; gap: 4px; }
.mat-pill {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text-dim); border-radius: 6px; padding: 4px 10px;
  font-size: .75rem; font-weight: 600; cursor: pointer;
  transition: all .15s;
}
.mat-pill:hover { color: var(--text); border-color: var(--accent); }
.mat-pill.active {
  background: var(--accent); color: #fff;
  border-color: var(--accent);
}

/* ── Slider row ── */
.slider-row { display: flex; align-items: center; gap: 10px; }
.sim-slider {
  flex: 1; -webkit-appearance: none; appearance: none; height: 6px;
  background: rgba(255,255,255,.12); border-radius: 3px; outline: none;
  border: 1px solid rgba(255,255,255,.1);
}
.sim-slider::-webkit-slider-runnable-track {
  height: 6px; border-radius: 3px;
  background: linear-gradient(to right, var(--accent-lo), rgba(255,255,255,.12));
}
.sim-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 18px; height: 18px; margin-top: -6px;
  border-radius: 50%; background: var(--accent); cursor: pointer;
  box-shadow: 0 0 8px var(--accent-lo);
  border: 2px solid rgba(255,255,255,.2);
}
.sim-slider::-moz-range-track {
  height: 6px; border-radius: 3px;
  background: linear-gradient(to right, var(--accent-lo), rgba(255,255,255,.12));
  border: none;
}
.sim-slider::-moz-range-thumb {
  width: 16px; height: 16px; border: 2px solid rgba(255,255,255,.2);
  border-radius: 50%; background: var(--accent); cursor: pointer;
}
.sim-slider-val {
  font-family: var(--mono); font-size: .82rem; font-weight: 700;
  color: var(--accent); min-width: 60px; text-align: right;
  cursor: pointer;
}
.sim-slider-val:hover { text-decoration: underline dotted; }

/* ── Cylinder cut-out panel (industrial switch panel look) ── */
.cyl-strip-wrap {
  background: linear-gradient(180deg, #161b27 0%, #1f2535 100%);
  border: 1px solid var(--border);
  border-radius: 8px; padding: 12px 14px; margin-top: 10px;
  position: relative;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}
.cyl-strip-wrap::before {
  content: '';
  position: absolute; top: 6px; left: 6px; right: 6px; bottom: 6px;
  border: 1px solid rgba(0,137,123,0.15);
  border-radius: 8px; pointer-events: none;
}
.cyl-strip-label {
  display: block; font-size: .72rem; color: var(--accent);
  font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  margin-bottom: 12px; position: relative; z-index: 1;
}
.cyl-strip-label::before {
  content: '▣ '; font-size: .9rem;
}
.cyl-strip {
  display: flex; flex-wrap: wrap; gap: 10px;
  position: relative; z-index: 1;
}
.cyl-btn {
  display: inline-flex; flex-direction: column; align-items: center;
  gap: 6px; padding: 10px 12px 8px;
  border-radius: 8px;
  background: #0a0d14;
  border: 1px solid #2a3050;
  color: var(--text); cursor: pointer;
  transition: all .15s; min-width: 92px;
  position: relative;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.4);
}
.cyl-btn::before {
  /* LED indicator at top */
  content: ''; display: block;
  width: 10px; height: 10px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #5cffaa, #3ddc84 60%, #1f8a4a);
  box-shadow: 0 0 8px #3ddc84, inset 0 0 2px rgba(0,0,0,0.4);
}
.cyl-btn .cyl-num {
  font-weight: 700; font-size: .82rem;
  font-family: var(--mono); color: var(--text);
  letter-spacing: .04em;
}
.cyl-btn .cyl-state {
  font-size: .62rem; color: var(--green); font-weight: 700;
  letter-spacing: .1em;
  background: rgba(61,220,132,0.1);
  padding: 1px 6px; border-radius: 3px;
}
.cyl-btn:hover { transform: translateY(-1px); border-color: var(--accent); }
.cyl-btn:active { transform: scale(0.97); }

/* CUT-OUT state — red LED, dim panel */
.cyl-btn.cut {
  border-color: #5a1f1f;
  background: #1a0a0a;
}
.cyl-btn.cut::before {
  background: radial-gradient(circle at 30% 30%, #ff8a8a, #ef5350 60%, #8a1f1f);
  box-shadow: 0 0 8px #ef5350, inset 0 0 2px rgba(0,0,0,0.4);
}
.cyl-btn.cut .cyl-state {
  color: var(--red); background: rgba(255,85,85,0.12);
}
.cyl-btn.cut .cyl-num { color: #ff8a8a; }

/* Recorded — golden bezel ring */
.cyl-btn.recorded {
  border-color: var(--gold);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.4), 0 0 0 1px var(--gold);
}
.cyl-btn.recorded::after {
  content: '✓'; position: absolute;
  top: 4px; right: 6px;
  font-size: .68rem; color: var(--gold); font-weight: 700;
}

/* ── Results row ── */
.readout-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}
.readout-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px;
  text-align: center;
}
.readout-label {
  font-size: .72rem; color: var(--text-dim); text-transform: uppercase;
  letter-spacing: .04em; font-weight: 600; margin-bottom: 4px;
}
.readout-value {
  font-family: var(--mono); font-size: 1.3rem;
  font-weight: 700; color: var(--accent);
}
.readout-unit { font-size: .72rem; color: var(--text-dim); margin-top: 2px; }

/* ── Explore cards ── */
.explore-cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
}
.explore-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px;
}
.explore-card-title {
  font-size: 1rem; font-weight: 700; color: var(--accent);
  margin-bottom: 8px;
}
.explore-card-body {
  font-size: .88rem; color: var(--text); line-height: 1.55;
}
.explore-card-formula {
  display: block; margin: 8px 0; padding: 8px 10px;
  background: var(--surface2); border-left: 3px solid var(--accent);
  border-radius: 4px; font-family: var(--mono);
  font-size: .82rem; color: var(--gold);
}
.explore-card-note {
  display: block; margin-top: 8px; padding: 6px 8px;
  background: rgba(245,200,66,.08); border-radius: 4px;
  font-size: .8rem; color: var(--gold); font-style: italic;
}

/* ── Practice & Quiz ── */
.practice-panel, .question-panel, .quiz-result {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; margin-bottom: 14px;
}
.pp-prompt, .qp-prompt {
  font-size: 1rem; color: var(--text); line-height: 1.6;
  margin-bottom: 14px;
}
.pp-input-row {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
}
.qi-input, .pp-input {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 6px; padding: 8px 12px; color: var(--text);
  font-family: var(--mono); font-size: .9rem; width: 140px;
}
.qi-input:focus { outline: none; border-color: var(--accent); }
.pp-unit { color: var(--text-dim); font-size: .85rem; min-width: 50px; }
.btn {
  padding: 8px 16px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--surface2); color: var(--text); cursor: pointer;
  font-size: .85rem; font-weight: 600; transition: all .15s;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { filter: brightness(1.1); }
.btn-ghost { background: transparent; }
.feedback {
  margin-top: 12px; padding: 10px 14px; border-radius: 8px;
  font-size: .88rem; display: none;
}
.feedback.show { display: block; }
.feedback.correct { background: rgba(61,220,132,.12); color: var(--green); border-left: 3px solid var(--green); }
.feedback.wrong { background: rgba(255,85,85,.12); color: var(--red); border-left: 3px solid var(--red); }
.practice-bar, .quiz-bar {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px 14px;
}
.pbar-score { font-size: .9rem; color: var(--text); font-weight: 600; }
.solution-panel {
  background: var(--surface); border: 1px solid var(--accent);
  border-radius: var(--radius); padding: 14px; margin-top: 12px;
  font-size: .88rem; line-height: 1.6;
}
.solution-panel h4 { color: var(--accent); margin-bottom: 8px; }
.answer-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px; margin: 10px 0;
}
.answer-opt {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 14px; color: var(--text);
  cursor: pointer; font-size: .88rem; transition: all .15s;
  text-align: left;
}
.answer-opt:hover { border-color: var(--accent); }
.answer-opt.selected { border-color: var(--accent); background: var(--accent-lo); }
.answer-opt.correct { border-color: var(--green); background: rgba(61,220,132,.1); }
.answer-opt.wrong { border-color: var(--red); background: rgba(255,85,85,.1); }
.qp-header {
  font-size: .82rem; color: var(--text-dim); font-weight: 600;
  margin-bottom: 10px;
}
.qr-header { text-align: center; margin-bottom: 14px; }
.qr-score { font-size: 2rem; font-weight: 700; color: var(--accent); }
.qr-stars { font-size: 1.6rem; margin: 8px 0; color: var(--gold); }
.qr-verdict { color: var(--text-dim); font-size: .9rem; }

/* ── Toast notifications ── */
.toast {
  position: fixed; top: 24px; left: 50%; transform: translateX(-50%) translateY(-12px);
  background: linear-gradient(135deg, #161b27, #1f2535);
  border: 1px solid var(--green); border-left: 4px solid var(--green);
  color: var(--text); padding: 10px 18px;
  border-radius: 8px; z-index: 9999;
  font-size: .86rem; font-weight: 600;
  box-shadow: 0 8px 24px rgba(0,0,0,.5), 0 0 16px rgba(61,220,132,0.3);
  display: flex; align-items: center; gap: 10px;
  opacity: 0;
  transition: opacity .25s ease, transform .25s ease;
  pointer-events: none;
  max-width: 92vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { border-color: var(--red); border-left-color: var(--red); }
.toast .toast-icon {
  width: 22px; height: 22px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--green); color: #0d1117;
  font-weight: 700; font-size: .85rem; flex-shrink: 0;
}
.toast.error .toast-icon { background: var(--red); color: #fff; }
.toast-body { font-family: var(--mono); font-size: .82rem; color: var(--text-dim); }
.toast-body strong { color: var(--accent); font-weight: 700; }

/* ── Context menu ── */
.ctx-menu {
  position: absolute; z-index: 100; min-width: 160px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 4px 0; box-shadow: 0 8px 24px rgba(0,0,0,.4);
}
.ctx-item {
  display: block; width: 100%; padding: 8px 16px; border: none;
  background: transparent; color: var(--text); font-size: .82rem;
  text-align: left; cursor: pointer; transition: background .12s;
}
.ctx-item:hover { background: var(--accent-lo); color: var(--accent); }

/* ── User Guide ── */
.user-guide {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; margin-top: 24px;
}
.user-guide-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 1.1rem; font-weight: 700; color: var(--accent);
  margin-bottom: 14px;
}
.guide-icon-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; background: var(--accent-lo);
  border-radius: 6px;
}
.user-guide details {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; padding: 0; margin-bottom: 8px;
  overflow: hidden;
}
.user-guide summary {
  cursor: pointer; padding: 10px 14px; font-weight: 600;
  color: var(--text); list-style: none; display: flex; align-items: center; gap: 8px;
}
.user-guide summary::-webkit-details-marker { display: none; }
.user-guide summary::after {
  content: '+'; margin-left: auto; color: var(--accent);
  font-size: 1.1rem; font-weight: 700;
}
.user-guide details[open] summary::after { content: '−'; }
.guide-section-num {
  background: var(--accent); color: #fff;
  padding: 2px 7px; border-radius: 4px;
  font-size: .75rem; font-weight: 700;
}
.guide-content {
  padding: 0 14px 14px; font-size: .88rem;
  line-height: 1.6; color: var(--text);
}
.guide-content p { margin-bottom: 8px; }
.guide-content ul { margin: 8px 0 8px 20px; }
.guide-content li { margin-bottom: 5px; }
kbd {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 4px; padding: 1px 6px; font-family: var(--mono);
  font-size: .8rem; color: var(--accent);
}

/* ── SEO Article ── */
.seo-article {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; margin-top: 22px;
  color: var(--text); font-size: .92rem; line-height: 1.7;
}
.seo-article h2 { color: var(--accent); margin-bottom: 12px; font-size: 1.4rem; }
.seo-article h3 { color: var(--text); margin: 18px 0 10px; font-size: 1.1rem; }
.seo-article p { margin-bottom: 12px; }
.seo-article a { color: var(--accent); text-decoration: none; }
.seo-article a:hover { text-decoration: underline; }
.seo-article table { color: #1a1a2e; }
.author-byline {
  display: flex; align-items: center; gap: 12px;
  background: var(--surface2); padding: 10px 12px;
  border-radius: 8px; margin-bottom: 16px;
  font-size: .82rem; color: var(--text-dim);
}
.author-byline img { border-radius: 50%; }
.author-byline a { color: var(--accent); text-decoration: none; }
.byline-row1 { font-weight: 600; color: var(--text); }

/* ── Responsive 768px ── */
@media (max-width: 768px) {
  body { padding: 12px 12px 50px; }
  .dual-canvas-row { grid-template-columns: 1fr; }
  .cp-params { grid-template-columns: 1fr; }
  header h1 { font-size: 1.3rem; }
  .readout-row { grid-template-columns: repeat(2, 1fr); }
  .lab-steps { grid-template-columns: 1fr; }
}

/* ── Responsive 500px ── */
@media (max-width: 500px) {
  body { padding: 10px 8px 40px; }
  .controls-bar { padding: 8px 10px; gap: 8px; }
  .pill { padding: 5px 10px; font-size: .76rem; }
  .cp-actions { gap: 4px; }
  .cp-btn { padding: 5px 8px; font-size: .72rem; }
  .readout-row { grid-template-columns: 1fr 1fr; }
  .readout-value { font-size: 1.1rem; }
  .cyl-btn { min-width: 60px; padding: 6px 10px; }
  .explore-cards { grid-template-columns: 1fr; }
}