:root {
  --ink: #050809;
  --panel: rgba(4, 8, 9, 0.72);
  --panel-hard: rgba(2, 5, 6, 0.9);
  --line: rgba(219, 246, 238, 0.16);
  --paper: #eef7ea;
  --muted: #9aa89e;
  --cyan: #54f4ff;
  --blue: #7fb7ff;
  --hot: #ff9a36;
  --red: #ff4f3f;
  --green: #a8ff68;
  --shadow: rgba(0, 0, 0, 0.48);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

.cinema {
  position: relative;
  width: 100vw;
  height: 100vh;
  min-height: 680px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(219, 246, 238, 0.035) 1px, transparent 1px),
    linear-gradient(0deg, rgba(219, 246, 238, 0.025) 1px, transparent 1px),
    radial-gradient(circle at 58% 46%, rgba(84, 244, 255, 0.12), transparent 28rem),
    radial-gradient(circle at 86% 16%, rgba(255, 154, 54, 0.16), transparent 24rem),
    #050809;
  background-size: 34px 34px, 34px 34px, auto, auto, auto;
}

.cinema::after {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(180deg, rgba(5, 8, 9, 0.1), transparent 28%, rgba(5, 8, 9, 0.62)),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.022) 0 1px, transparent 1px 5px);
}

#neural-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
}

.dependency-error {
  /* Fixed to the viewport so short 521–860px layouts (tall .cinema) still show the alert above the fold. */
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 6;
  width: min(420px, calc(100vw - 40px));
  max-height: calc(100svh - 40px);
  overflow: auto;
  padding: 22px 24px;
  border: 1px solid rgba(255, 79, 63, 0.45);
  border-radius: 8px;
  background: var(--panel-hard);
  box-shadow: 0 18px 70px var(--shadow);
  transform: translate(-50%, -50%);
  backdrop-filter: blur(18px);
}

.dependency-error[hidden] {
  display: none;
}

.dependency-error h2 {
  margin: 6px 0 10px;
  color: var(--hot);
  font-family: Newsreader, Georgia, "Times New Roman", serif;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 760;
  line-height: 1.15;
}

.dependency-error p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

body.dependency-failed .hud,
body.dependency-failed .layer-strip {
  opacity: 0.55;
}

body.dependency-failed .control-row,
body.dependency-failed .button-grid {
  pointer-events: none;
}

.hud,
.layer-strip {
  position: absolute;
  z-index: 4;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 18px 70px var(--shadow);
  backdrop-filter: blur(18px);
}

.hud-left {
  top: clamp(14px, 2.4vw, 28px);
  left: clamp(14px, 2.4vw, 28px);
  width: min(390px, calc(100vw - 28px));
  padding: 17px;
}

.hud-right {
  top: clamp(14px, 2.4vw, 28px);
  right: clamp(14px, 2.4vw, 28px);
  width: 330px;
  padding: 14px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--green);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.eyebrow.amber {
  color: var(--hot);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  max-width: 330px;
  font-family: "Newsreader", Georgia, serif;
  font-size: clamp(38px, 4.4vw, 62px);
  line-height: 0.88;
  letter-spacing: 0;
}

h2 {
  font-family: "Newsreader", Georgia, serif;
  font-size: 30px;
  line-height: 0.98;
  letter-spacing: 0;
}

.topology-readout {
  margin-top: 8px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  line-height: 1.35;
}

.readout-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 16px;
}

.readout-grid div {
  min-width: 0;
  padding: 10px;
  border: 1px solid rgba(219, 246, 238, 0.12);
  border-radius: 6px;
  background: rgba(0, 3, 4, 0.56);
}

.readout-grid span,
.density-control span {
  display: block;
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.readout-grid strong {
  display: block;
  margin-top: 4px;
  overflow: hidden;
  color: var(--paper);
  font-size: 18px;
  line-height: 1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.button-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 14px;
}

.preset,
.icon-button {
  min-height: 40px;
  border: 1px solid rgba(219, 246, 238, 0.16);
  border-radius: 6px;
  background: rgba(219, 246, 238, 0.06);
  cursor: pointer;
  transition:
    border-color 160ms ease,
    background 160ms ease,
    transform 160ms ease;
}

.preset:hover,
.icon-button:hover {
  border-color: rgba(84, 244, 255, 0.6);
  background: rgba(84, 244, 255, 0.1);
}

.preset:active,
.icon-button:active {
  transform: translateY(1px);
}

.preset {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.preset.is-active {
  border-color: rgba(255, 154, 54, 0.72);
  background: rgba(255, 154, 54, 0.15);
  color: var(--hot);
}

.control-row {
  display: grid;
  grid-template-columns: 42px 42px 1fr;
  gap: 8px;
  align-items: stretch;
  margin-top: 10px;
}

.icon-button {
  display: grid;
  place-items: center;
}

.icon-button svg {
  width: 18px;
  height: 18px;
}

.density-control {
  display: grid;
  align-content: center;
  gap: 5px;
  min-width: 0;
  padding: 6px 8px;
  border: 1px solid rgba(219, 246, 238, 0.12);
  border-radius: 6px;
  background: rgba(0, 3, 4, 0.5);
}

.density-control input {
  width: 100%;
  accent-color: var(--cyan);
}

.layer-strip {
  left: 50%;
  bottom: clamp(14px, 2.4vw, 28px);
  width: min(880px, calc(100vw - 56px));
  padding: 10px;
  transform: translateX(-50%);
}

.layer-cards {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 7px;
}

.layer-card {
  position: relative;
  min-width: 0;
  overflow: hidden;
  padding: 9px 10px;
  border: 1px solid rgba(219, 246, 238, 0.12);
  border-radius: 6px;
  background: rgba(0, 3, 4, 0.58);
}

.layer-card::before {
  position: absolute;
  inset: auto 0 0;
  height: var(--fill, 0%);
  content: "";
  background: linear-gradient(0deg, rgba(84, 244, 255, 0.26), rgba(255, 154, 54, 0.18));
}

.layer-card.is-hot {
  border-color: rgba(255, 154, 54, 0.64);
}

.layer-card span,
.layer-card strong {
  position: relative;
  display: block;
}

.layer-card span {
  overflow: hidden;
  color: var(--paper);
  font-size: 12px;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.layer-card strong {
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
}

.timeline {
  height: 4px;
  margin-top: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(219, 246, 238, 0.13);
}

.timeline span {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), var(--blue), var(--green), var(--hot), var(--red));
}

@media (max-width: 860px) {
  html,
  body {
    overflow: auto;
  }

  .cinema {
    min-height: 960px;
  }

  .hud-left,
  .hud-right {
    left: 14px;
    right: 14px;
    width: auto;
  }

  .hud-right {
    top: 332px;
  }

  .layer-strip {
    width: calc(100vw - 28px);
  }

  .layer-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .cinema {
    min-height: 100svh;
  }

  .hud-left,
  .hud-right {
    padding: 12px;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 24px;
  }

  .readout-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .layer-card {
    padding: 8px 7px;
  }
}