:root {
  --bg: #17120d;
  --bg-glow: #221a12;
  --surface: #221b14;
  --surface-2: #2c241b;
  --field: #1b150f;
  --ink: #f5efe6;
  --muted: #a99a86;
  --faint: #7c705f;
  --line: rgba(245, 239, 230, 0.10);
  --line-soft: rgba(245, 239, 230, 0.06);
  --accent: #e0552f;
  --amber: #f4a23b;
  --good: #8fbf6f;
  --display: "Space Grotesk", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 14px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(720px 440px at 88% -10%, rgba(224, 85, 47, 0.13), transparent 62%),
    radial-gradient(620px 420px at -8% 4%, rgba(244, 162, 59, 0.07), transparent 60%);
  background-attachment: fixed;
}

.app {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 22px 72px;
}

/* ── Brand bar ─────────────────────────────────────────────── */
.top { display: flex; align-items: center; margin-bottom: 30px; }
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-family: var(--display);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.01em;
}
.brand .by { color: var(--faint); font-weight: 500; }
.spark {
  width: 13px; height: 13px; border-radius: 4px;
  background: linear-gradient(135deg, var(--amber), var(--accent));
  box-shadow: 0 0 14px rgba(224, 85, 47, 0.7);
}

/* ── Composer (step 1) ─────────────────────────────────────── */
.composer {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  display: grid;
  gap: 14px;
  box-shadow: 0 30px 60px -40px rgba(0, 0, 0, 0.8);
}

.big-label {
  font-family: var(--display);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.01em;
}

textarea, input, select {
  font-family: var(--body);
  font-size: 15px;
  color: var(--ink);
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px 13px;
  width: 100%;
}
textarea {
  resize: vertical;
  min-height: 84px;
  line-height: 1.5;
}
textarea::placeholder, input::placeholder { color: var(--faint); }
textarea:focus, input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(224, 85, 47, 0.18);
}

.composer-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.composer-row .grow { flex: 1; }

.cost-hint {
  margin: 0;
  font-size: 12.5px;
  color: var(--muted);
}
.cost-hint b { color: var(--amber); font-weight: 600; }

/* ── Disclosure panels (options / export) ──────────────────── */
details.panel {
  border-top: 1px solid var(--line-soft);
  padding-top: 12px;
}
details.panel > summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
}
details.panel > summary::-webkit-details-marker { display: none; }
details.panel > summary::before {
  content: "+";
  font-size: 14px;
  color: var(--accent);
  width: 14px;
  text-align: center;
}
details.panel[open] > summary::before { content: "–"; }
details.panel[open] > summary { margin-bottom: 14px; }

.opt-grid { display: grid; gap: 14px; }
.field { display: grid; gap: 7px; font-size: 13px; color: var(--muted); }
.field .sub { color: var(--faint); }
.field-row { display: grid; grid-template-columns: 1fr 92px; gap: 12px; }
.range-top { display: flex; justify-content: space-between; align-items: baseline; }
.range-top output { font-family: var(--mono); color: var(--amber); font-size: 13px; }

input[type="color"] { padding: 4px; height: 44px; cursor: pointer; }

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23e0552f' stroke-width='1.6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 13px center;
  padding-right: 32px;
}

input[type="range"] {
  -webkit-appearance: none; appearance: none;
  background: transparent; padding: 0; border: 0; width: 100%; min-height: 22px;
}
input[type="range"]::-webkit-slider-runnable-track { height: 4px; border-radius: 99px; background: var(--surface-2); }
input[type="range"]::-moz-range-track { height: 4px; border-radius: 99px; background: var(--surface-2); }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; margin-top: -7px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--bg); box-shadow: 0 0 0 1px var(--accent); cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--bg); box-shadow: 0 0 0 1px var(--accent); cursor: pointer;
}

.check {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--muted); cursor: pointer;
}
.check input { width: 18px; height: 18px; accent-color: var(--accent); }

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  font-family: var(--display);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  min-height: 46px;
  cursor: pointer;
  text-align: center;
  color: var(--ink);
  transition: transform 0.1s ease, background 0.15s ease, box-shadow 0.2s ease, border-color 0.15s ease;
}
.btn:active { transform: translateY(1px); }
/* Signature: the molten Generate button */
.btn.primary {
  background: linear-gradient(135deg, var(--amber), var(--accent));
  color: #1a0f08;
  box-shadow: 0 10px 28px -12px rgba(224, 85, 47, 0.8);
}
.btn.primary:hover { box-shadow: 0 12px 34px -10px rgba(244, 162, 59, 0.85); }
.btn.ghost { background: var(--surface-2); color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--accent); color: var(--amber); }
.btn.tiny { min-height: 36px; padding: 7px 13px; font-size: 13px; }
.btn:disabled { opacity: 0.45; cursor: wait; box-shadow: none; }

/* ── Progress ──────────────────────────────────────────────── */
.progress {
  height: 6px; border-radius: 99px; background: var(--surface-2);
  overflow: hidden; opacity: 0; transition: opacity 0.15s ease;
}
.progress.active { opacity: 1; }
.progress-bar {
  height: 100%; width: 0%; border-radius: inherit;
  background: linear-gradient(90deg, var(--amber), var(--accent));
  transition: width 0.25s ease;
}
.status { min-height: 17px; font-size: 12px; color: var(--muted); margin: 0; }

/* ── Results ───────────────────────────────────────────────── */
.results { display: grid; gap: 16px; margin-top: 34px; }
.results-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap;
}
h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.01em;
}
.results-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.muted { color: var(--faint); font-size: 14px; margin: 0; max-width: 56ch; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 14px;
}

.concept, .final {
  position: relative;
  display: grid; gap: 9px; padding: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform 0.14s ease, border-color 0.14s ease, box-shadow 0.14s ease;
}
.concept:hover { transform: translateY(-3px); border-color: rgba(244, 162, 59, 0.5); }
.concept.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent) inset, 0 14px 30px -18px rgba(224, 85, 47, 0.7);
}
.final { cursor: default; }
.concept.error { cursor: default; opacity: 0.5; }

.thumb {
  aspect-ratio: 1; border-radius: 7px; overflow: hidden;
  display: grid; place-items: center;
  background: #0d0b08;
  border: 1px solid var(--line-soft);
}
.thumb img, .thumb svg { width: 100%; height: 100%; object-fit: contain; display: block; }
.thumb.err { color: var(--accent); font-size: 26px; font-weight: 700; font-family: var(--display); background: var(--surface-2); }

.concept input[type="checkbox"] {
  position: absolute; top: 16px; left: 16px;
  width: 22px; height: 22px; margin: 0;
  accent-color: var(--accent); z-index: 2; cursor: pointer;
}

.tag {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.04em; color: var(--muted); text-align: center;
}

.final .download {
  text-align: center; text-decoration: none;
  font-family: var(--display); font-weight: 600; font-size: 13px;
  background: linear-gradient(135deg, var(--amber), var(--accent));
  color: #1a0f08; border-radius: 8px; padding: 9px 10px;
}
.final .download:hover { filter: brightness(1.06); }

.enter { animation: rise 0.28s cubic-bezier(0.2, 0.8, 0.3, 1.15); }
@keyframes rise {
  from { opacity: 0; transform: translateY(8px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Accessibility / responsive ────────────────────────────── */
:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }

@media (max-width: 560px) {
  .app { padding: 28px 16px 56px; }
  .composer-row .btn.primary { flex: 1; }
}

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