:root {
  color-scheme: dark;
  --bg: #080b12;
  --panel: #111827;
  --panel-soft: #162033;
  --text: #f7fafc;
  --muted: #a7b1c2;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --danger: #fb7185;
  --warning: #fbbf24;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 10%, rgba(56, 189, 248, 0.18), transparent 30rem),
    radial-gradient(circle at 90% 0%, rgba(167, 139, 250, 0.14), transparent 26rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 48px 0;
}

.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: end;
  margin-bottom: 24px;
}

.hero-actions {
  display: grid;
  gap: 12px;
  justify-items: stretch;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  margin: 0 0 12px;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 5.6rem);
  line-height: 0.95;
  margin-bottom: 18px;
  max-width: 900px;
}

h2 {
  font-size: 1.1rem;
}

.lede,
.panel p {
  color: var(--muted);
}

.status-card,
.panel {
  border: 1px solid var(--line);
  background: rgba(17, 24, 39, 0.82);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
}

.status-card {
  min-width: 220px;
  padding: 18px 20px;
  color: var(--accent);
  text-align: center;
}

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.7fr);
  gap: 20px;
}

.panel {
  padding: 24px;
}

.drop-zone {
  display: grid;
  place-items: center;
  min-height: 150px;
  border: 1px dashed rgba(125, 211, 252, 0.55);
  border-radius: 20px;
  background: rgba(14, 165, 233, 0.08);
  color: var(--accent);
  cursor: pointer;
  margin: 20px 0;
}

.drop-zone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #06111f;
  cursor: pointer;
  font-weight: 800;
  padding: 13px 18px;
}

button:disabled {
  cursor: not-allowed;
  filter: grayscale(1);
  opacity: 0.5;
}

.secondary-button {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  color: var(--text);
}

.message {
  color: var(--muted);
  min-height: 24px;
  margin-top: 14px;
}

.message.error {
  color: var(--danger);
}

.message.warning {
  color: var(--warning);
}

.status-list {
  display: grid;
  gap: 12px;
  margin: 0;
}

.status-list div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  text-align: right;
  overflow-wrap: anywhere;
}

.viewer-panel {
  margin-top: 20px;
}

.viewer-header,
.viewer-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
}

.viewer {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #020617;
}

canvas {
  display: block;
  width: 100%;
  height: min(62vh, 620px);
}

.viewer-overlay {
  position: absolute;
  inset: auto 18px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(2, 6, 23, 0.78);
  color: var(--muted);
  padding: 12px 14px;
}

.controls {
  display: grid;
  align-content: start;
  gap: 16px;
  min-width: 260px;
}

.controls label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 700;
}

input[type="range"] {
  accent-color: var(--accent);
}

.login-shell {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(460px, 100%);
}

.login-panel h1 {
  font-size: clamp(2rem, 8vw, 4rem);
}

.field {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 700;
  margin: 18px 0;
}

.field input {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(2, 6, 23, 0.74);
  color: var(--text);
  font: inherit;
  padding: 13px 14px;
}

@media (max-width: 820px) {
  .hero,
  .grid,
  .viewer-header,
  .viewer-layout {
    grid-template-columns: 1fr;
  }

  .status-card,
  .controls {
    min-width: 0;
  }
}