:root {
  color-scheme: dark;
  --bg: #080b12;
  --panel: rgba(20, 25, 38, 0.82);
  --panel-border: rgba(255, 255, 255, 0.1);
  --muted: #949bad;
  --text: #f5f7fb;
  --accent: #ff4da6;
  --accent-soft: rgba(255, 77, 166, 0.15);
  --output: rgb(255 0 0);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 4%, rgba(69, 87, 190, 0.18), transparent 32rem),
    radial-gradient(circle at 88% 20%, rgba(255, 77, 166, 0.12), transparent 30rem),
    var(--bg);
}

button, input, select, textarea { font: inherit; }
button, select, input { min-height: 44px; }

button {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  background: linear-gradient(135deg, #f53491, #9c3df0);
  color: white;
  cursor: pointer;
  font-weight: 700;
  transition: transform 120ms ease, border-color 120ms ease, filter 120ms ease;
}

button:hover { filter: brightness(1.12); transform: translateY(-1px); }
button:active { transform: translateY(1px); }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid rgba(105, 190, 255, 0.7);
  outline-offset: 2px;
}

.topbar, main, footer { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 30px 0 20px;
}

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(1.5rem, 3vw, 2.3rem); letter-spacing: -0.04em; }
h2 { margin-bottom: 0; font-size: 1.2rem; letter-spacing: -0.02em; }

.eyebrow, .section-label {
  margin-bottom: 6px;
  color: #b8bfd0;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.status-badge, .awake-pill, .trace-count {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(126, 239, 190, 0.25);
  border-radius: 999px;
  padding: 8px 12px;
  background: rgba(39, 175, 115, 0.09);
  color: #b5f5d5;
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
}

.status-badge span { width: 8px; height: 8px; border-radius: 50%; background: #54dda0; box-shadow: 0 0 12px #54dda0; }

.panel {
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  background: var(--panel);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(18px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(250px, 0.8fr) minmax(430px, 1.4fr);
  min-height: 310px;
  overflow: hidden;
}

.hero-copy { align-self: center; padding: 38px; }
.hero-copy > p:not(.section-label) { max-width: 36rem; margin: 14px 0 16px; color: var(--muted); line-height: 1.55; }
.simulation-notice {
  display: grid;
  gap: 5px;
  max-width: 38rem;
  margin: 0 0 24px;
  border: 1px solid rgba(255, 190, 92, 0.3);
  border-left: 4px solid #ffbe5c;
  border-radius: 10px;
  padding: 12px 14px;
  background: rgba(122, 75, 8, 0.16);
  color: #ffe1ad;
  line-height: 1.45;
}
.simulation-notice strong { font-size: .78rem; letter-spacing: .04em; text-transform: uppercase; }
.simulation-notice span { color: #d9c5a4; font-size: .76rem; }
.mode-callout { display: flex; flex-direction: column; gap: 4px; }
.mode-callout span { color: var(--muted); font-size: 0.78rem; }
.mode-callout strong { font-size: 1.25rem; }

.whip-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 310px;
  overflow: hidden;
  background:
    radial-gradient(circle, color-mix(in srgb, var(--output) 18%, transparent), transparent 58%),
    repeating-linear-gradient(120deg, transparent 0 34px, rgba(255,255,255,0.025) 35px 36px);
}

.device-column { min-width: 0; display: flex; flex-direction: column; }
.whip-stage { --emitter-x: 56%; flex: 1; min-height: 380px; }
.remote { padding: 22px 26px; border-top: 1px solid var(--panel-border); background: rgba(5, 8, 14, .45); }
.remote label { display: block; margin: 8px 0; font-size: .8rem; color: #c6cbda; }
.remote-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; }
.remote-row button { padding-inline: 20px; }
.remote p:not(.section-label) { margin: 12px 0 0; color: var(--muted); font-size: .75rem; line-height: 1.5; }
.controls > summary { cursor: pointer; font-weight: 700; }
.controls[open] > summary { margin-bottom: 24px; }
.fiber-bundle { position: absolute; left: var(--emitter-x); top: 50%; width: 48%; height: 52%; transform: translateY(-50%); }
.fiber-bundle i {
  position: absolute;
  left: 0;
  top: 50%;
  width: 94%;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--output), color-mix(in srgb, var(--output) 48%, transparent));
  box-shadow: 0 0 8px var(--output), 0 0 24px color-mix(in srgb, var(--output) 65%, transparent);
  transform-origin: left center;
  opacity: 0.88;
}
.fiber-bundle i:nth-child(1) { transform: rotate(-22deg); }
.fiber-bundle i:nth-child(2) { transform: rotate(-14deg); }
.fiber-bundle i:nth-child(3) { transform: rotate(-7deg); }
.fiber-bundle i:nth-child(4) { transform: rotate(0); }
.fiber-bundle i:nth-child(5) { transform: rotate(7deg); }
.fiber-bundle i:nth-child(6) { transform: rotate(14deg); }
.fiber-bundle i:nth-child(7) { transform: rotate(22deg); }

.emitter { position: absolute; left: var(--emitter-x); top: 50%; width: 84px; height: 84px; border-radius: 50%; background: var(--output); box-shadow: 0 0 20px var(--output), 0 0 60px var(--output); transform: translate(-50%, -50%); }
.handle { position: absolute; right: calc(100% - var(--emitter-x)); top: 50%; width: min(360px, calc(var(--emitter-x) - 12px)); height: 100px; border-radius: 56px 16px 16px 56px; background: linear-gradient(#444d60, #171b25 45%, #0a0c12 55%, #343c4d); transform: translateY(-50%); box-shadow: 0 16px 30px rgba(0,0,0,.5); }
.handle::before { content: ""; position: absolute; inset: 14px 44px 14px 16px; border: 1px solid rgba(255,255,255,.12); border-radius: 40px 10px 10px 40px; }
.handle button { position: absolute; right: 20px; top: 6px; width: 88px; height: 88px; padding: 0; background: transparent; border: none; border-radius: 50%; touch-action: none; user-select: none; }
.handle button span { position: absolute; left: 24px; top: 24px; width: 40px; height: 40px; border-radius: 50%; background: #151923; border: 3px solid #7b8498; }
.handle button[aria-pressed="true"] span { background: #69768e; border-color: #cbd5e9; box-shadow: 0 0 8px #95b5ff; }
.sleep-overlay { position: absolute; inset: auto auto 26px; margin: 0; border-radius: 999px; padding: 8px 14px; background: rgba(5,7,12,.82); color: #bcc3d4; font-size: .8rem; }

.workspace { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); gap: 20px; margin-top: 20px; }
.control-column, .state-column { display: grid; align-content: start; gap: 20px; }
.controls, .scenario, .state-panel, .trace-panel { padding: 26px; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 20px; }
.quiet-button { padding: 0 15px; background: rgba(255,255,255,.05); color: #d7dbea; font-weight: 650; }

.quick-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.quick-actions button { display: flex; flex-direction: column; align-items: flex-start; min-height: 76px; padding: 14px 16px; text-align: left; }
.quick-actions small { margin-top: 4px; color: rgba(255,255,255,.72); font-size: .72rem; font-weight: 500; }

.keyboard-help { margin-top: 14px; border: 1px solid rgba(255,255,255,.1); border-radius: 12px; background: rgba(5,8,14,.28); }
.keyboard-help summary { min-height: 44px; padding: 12px 14px; color: #dce2f2; cursor: pointer; font-size: .8rem; font-weight: 750; }
.keyboard-help > p { margin: 0; padding: 0 14px 10px; color: var(--muted); font-size: .74rem; line-height: 1.45; }
.keyboard-help dl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 0; padding: 0 14px 14px; }
.keyboard-help dl div { display: flex; align-items: center; gap: 9px; min-width: 0; }
.keyboard-help dt, .keyboard-help dd { margin: 0; }
.keyboard-help dd { color: #c7cede; font-size: .73rem; }
kbd { display: inline-grid; min-width: 30px; min-height: 28px; place-items: center; border: 1px solid #606a80; border-bottom-width: 3px; border-radius: 6px; padding-inline: 6px; background: #151b27; color: #f5f7fb; font: 700 .68rem/1 ui-monospace, monospace; }

.custom-press, .time-controls { margin-top: 20px; }
.custom-press label, .time-controls label { display: block; margin-bottom: 8px; color: #c6cbda; font-size: .78rem; font-weight: 700; }
.custom-press label span { color: var(--muted); font-weight: 500; }
.custom-press > div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; }
input, select, textarea { border: 1px solid rgba(255,255,255,.13); border-radius: 11px; background: #0e121c; color: var(--text); }
input, select { width: 100%; padding: 0 12px; }
.custom-press button, .scenario-actions button { padding-inline: 18px; }
.time-controls { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 10px; }
.time-controls label { grid-column: 1 / -1; }
.last-action { min-height: 1.2em; margin: 14px 0 0; color: var(--muted); font-size: .76rem; }
.field-help { margin: -8px 0 10px; color: var(--muted); font-size: .74rem; line-height: 1.45; }

textarea { width: 100%; min-height: 220px; resize: vertical; padding: 14px; font-family: "Cascadia Code", Consolas, monospace; font-size: .76rem; line-height: 1.5; }
.scenario-actions { display: flex; gap: 10px; margin-top: 10px; }

.state-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; margin: 0; }
.state-grid div { min-width: 0; border: 1px solid rgba(255,255,255,.07); border-radius: 12px; padding: 13px; background: rgba(5,8,14,.35); }
.state-grid .wide { grid-column: 1 / -1; }
.state-grid dt { color: var(--muted); font-size: .68rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
.state-grid dd { overflow-wrap: anywhere; margin: 5px 0 0; font-variant-numeric: tabular-nums; font-weight: 720; }
.awake-pill, .trace-count { padding: 6px 10px; }
.awake-pill.sleeping { border-color: rgba(255,174,84,.3); background: rgba(255,174,84,.1); color: #ffd3a0; }
.trace-count { border-color: rgba(125,159,255,.25); background: rgba(90,113,207,.1); color: #cbd5ff; }
pre { min-height: 270px; max-height: 420px; overflow: auto; margin: 0; border-radius: 12px; padding: 16px; background: #080b12; color: #b8e5ff; font: .73rem/1.5 "Cascadia Code", Consolas, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }

footer { padding: 24px 0 36px; color: #747d91; font-size: .76rem; text-align: center; }

.mode-picker { margin-top: 22px; }
.mode-picker label, .review-panel label { display: block; margin: 12px 0 8px; color: #c6cbda; font-size: .8rem; font-weight: 700; }
.mode-picker select { max-width: 100%; min-width: 0; }
.mode-picker .field-help, .review-panel .field-help { margin: 12px 0; }
.mode-navigation { display: flex; flex-wrap: wrap; gap: 8px; }
.review-panel { padding: 26px; min-width: 0; }
.review-panel summary { padding: 12px 0; cursor: pointer; font-weight: 700; }
.timing-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 12px; }
.timing-fields label { margin-top: 4px; }
.review-panel #mode-note { min-height: 90px; }
.review-panel .review-checkbox { display: flex; align-items: center; gap: 8px; }
.review-checkbox input { width: 18px; min-height: 18px; }
.review-panel .scenario-actions { flex-wrap: wrap; }

@media (max-width: 480px) {
  .timing-fields { grid-template-columns: 1fr; }
  .review-panel { padding: 20px; }
  .mode-navigation { flex-direction: column; }
}
@media (max-width: 360px) { .review-panel { padding: 16px; } }

@media (max-width: 800px) {
  .topbar, main, footer { width: min(100% - 24px, 680px); }
  .topbar { align-items: flex-start; flex-direction: column; gap: 14px; }
  .hero, .workspace { grid-template-columns: 1fr; }
  .hero-copy { padding: 26px; }
  .whip-stage { min-height: 250px; }
  .panel-heading { align-items: flex-start; flex-wrap: wrap; }
}

@media (max-width: 480px) {
  .quick-actions, .state-grid { grid-template-columns: 1fr; }
  .keyboard-help dl { grid-template-columns: 1fr; }
  .state-grid .wide { grid-column: auto; }
  .controls, .scenario, .state-panel, .trace-panel { padding: 20px; }
  .custom-press > div, .time-controls { grid-template-columns: 1fr; }
  .time-controls label { grid-column: auto; }
  .scenario-actions { align-items: stretch; flex-direction: column; }
  .panel-heading .quiet-button { width: 100%; }
  .whip-stage { min-height: 220px; }
}

@media (max-width: 360px) {
  .topbar, main, footer { width: calc(100% - 16px); }
  .hero-copy, .controls, .scenario, .state-panel, .trace-panel { padding: 16px; }
  .status-badge { white-space: normal; }
  textarea { min-height: 170px; }
}

@media (forced-colors: active) {
  button, input, select, textarea, .panel, .keyboard-help, .simulation-notice { border: 1px solid CanvasText; }
  .status-badge span { background: CanvasText; box-shadow: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}