:root {
  --bg-deep: #0d1016;
  --bg-mid: #141b24;
  --bg-soft: #1a2330;
  --panel: #111822;
  --panel-alt: #0f1520;
  --ink: #e8edf4;
  --muted: #9fafc3;
  --accent: #39d0bf;
  --accent-strong: #23b4a4;
  --danger: #ff7e6a;
  --border: #29384c;
  --shadow: rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Avenir Next", "Futura", "Gill Sans", "Trebuchet MS", sans-serif;
  background:
    radial-gradient(1100px 560px at 0% -10%, #1f2735 0%, transparent 65%),
    radial-gradient(950px 520px at 100% 0%, #10212a 0%, transparent 70%),
    linear-gradient(170deg, var(--bg-deep), var(--bg-mid));
}

code {
  font-family: "Consolas", "Monaco", "Courier New", monospace;
}

.layout {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  grid-template-columns: minmax(300px, 390px) 1fr;
  gap: 1rem;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: linear-gradient(180deg, #121b27 0%, #0e151e 100%);
  box-shadow: 0 14px 28px var(--shadow);
}

.controls {
  padding: 1.2rem 1.2rem 1rem;
}

.preview {
  position: relative;
  padding: 0.8rem;
  background: linear-gradient(150deg, #111a25 0%, #0f1620 100%);
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  font-size: 0.73rem;
  text-transform: uppercase;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: 2rem;
  line-height: 1.05;
  font-weight: 800;
}

.intro {
  margin: 0.65rem 0 1.1rem;
  color: var(--muted);
  line-height: 1.4;
}

.field {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 0.8rem;
  color: #d8e3ef;
  font-weight: 600;
}

select,
input[type="number"] {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #34485f;
  padding: 0.5rem 0.6rem;
  font-size: 0.95rem;
  color: #e6eef8;
  background: #172131;
}

.params {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 0.9rem;
}

.param {
  border: 1px solid #2a3b50;
  border-radius: 10px;
  padding: 0.55rem 0.55rem 0.65rem;
  background: linear-gradient(180deg, #121c2a 0%, #121b28 100%);
}

.param-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.7rem;
  margin-bottom: 0.35rem;
}

.param-head label {
  font-size: 0.9rem;
  font-weight: 650;
}

.param-head output {
  font-family: "Consolas", "Monaco", "Courier New", monospace;
  font-size: 0.82rem;
  color: #9ec6de;
}

.param input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.button-row {
  margin-top: 1rem;
  display: flex;
  gap: 0.7rem;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 0.64rem 0.85rem;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  color: #091317;
  background: var(--accent);
  transition: background 120ms ease-in;
}

button:hover {
  background: var(--accent-strong);
}

button.secondary {
  color: #d6e2f0;
  background: #27384e;
}

button.secondary:hover {
  background: #324b68;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.status {
  margin: 0.95rem 0 0;
  font-size: 0.9rem;
  color: #c3d2e3;
  min-height: 1.2rem;
}

.status.error {
  color: var(--danger);
  font-weight: 600;
}

#previewCanvas {
  width: 100%;
  min-height: 500px;
  border: 1px solid #2b3e53;
  border-radius: 14px;
  background: linear-gradient(180deg, #131f2e 0%, #101721 100%);
  touch-action: none;
}

.hint {
  margin: 0.55rem 0 0.5rem;
  color: #afc4d7;
  font-size: 0.88rem;
}

.view-controls {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 0.6rem;
  align-items: end;
  margin-bottom: 0.7rem;
}

.mini-field {
  display: grid;
  gap: 0.25rem;
  font-size: 0.82rem;
  color: #ccdae9;
  font-weight: 600;
}

.mini-field input[type="range"] {
  width: 100%;
  accent-color: #78e0d4;
}

.scad-box {
  border-top: 1px solid #2a3a4f;
  padding-top: 0.55rem;
}

.scad-box summary {
  cursor: pointer;
  font-weight: 700;
  color: #d3deea;
}

.scad-box pre {
  margin: 0.65rem 0 0;
  max-height: 260px;
  overflow: auto;
  border-radius: 10px;
  border: 1px solid #2d3f54;
  background: #0b1119;
  color: #c5d4e5;
  padding: 0.7rem;
  font-size: 0.81rem;
  line-height: 1.35;
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr;
  }

  #previewCanvas {
    min-height: 380px;
  }
}

@media (max-width: 620px) {
  .view-controls {
    grid-template-columns: 1fr;
  }
}