:root {
  --bg: #0f1419;
  --card: #1a222c;
  --text: #e8eef4;
  --muted: #9aa8b5;
  --accent: #c4a35a;
  --line: #2a3542;
  --primary: #1e3a5f;
  --font: "DM Sans", system-ui, sans-serif;
  --display: "Fraunces", Georgia, serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(ellipse 70% 50% at 20% -10%, #1e3a5f55, transparent),
    var(--bg);
  line-height: 1.5;
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
}
.brand {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.step-label { color: var(--muted); font-size: 0.85rem; }

.progress {
  height: 3px;
  background: var(--line);
}
.progress-bar {
  height: 100%;
  width: 20%;
  background: var(--accent);
  transition: width 0.25s ease;
}

.wrap {
  width: min(560px, calc(100% - 2rem));
  margin: 1.75rem auto 3rem;
}

.panel h1 {
  font-family: var(--display);
  font-size: clamp(1.6rem, 4vw, 2rem);
  margin: 0 0 0.4rem;
  letter-spacing: -0.02em;
}
.sub { color: var(--muted); margin: 0 0 1.25rem; }

label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  margin: 0.9rem 0 0.35rem;
}
input, textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  font: inherit;
}
textarea { resize: vertical; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.5rem;
}
.btn {
  border: 0;
  border-radius: 10px;
  padding: 0.75rem 1.1rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.btn.primary { background: var(--accent); color: #1a1408; }
.btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}
.btn:disabled { opacity: 0.55; cursor: wait; }

.research-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.25rem;
  display: grid;
  gap: 0.75rem;
}
.hint { color: var(--muted); font-size: 0.85rem; margin: 0.75rem 0 0; }

.check-row {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  margin: 0.85rem 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  cursor: pointer;
}

.check-row input {
  margin-top: 0.25rem;
  width: auto;
}

.check-row span {
  font-size: 0.92rem;
  line-height: 1.4;
}

.logo-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.file-btn {
  display: inline-flex;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  border: 1px dashed var(--line);
  cursor: pointer;
  color: var(--muted);
  margin: 0;
}
#logo_preview {
  border-radius: 10px;
  background: #fff;
}

.palette-presets {
  display: flex;
  gap: 0.6rem;
  margin: 0.5rem 0 1rem;
}
.swatch {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid #fff3;
  cursor: pointer;
  background: linear-gradient(135deg, var(--p, #333) 50%, var(--a, #999) 50%);
}
.swatch:nth-child(1) { --p: #1e3a5f; --a: #c4a35a; }
.swatch:nth-child(2) { --p: #1a4d3e; --a: #e2b04a; }
.swatch:nth-child(3) { --p: #3b2f2f; --a: #d97642; }
.swatch:nth-child(4) { --p: #243b53; --a: #38b2ac; }

.color-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}
.color-grid label {
  display: grid;
  gap: 0.35rem;
  margin: 0;
}
.color-grid input[type="color"] {
  width: 100%;
  height: 48px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
}

.preview-card {
  margin-top: 1.25rem;
  padding: 1.25rem;
  border-radius: 14px;
  background: var(--preview-secondary, #0f1f33);
  color: #f2f6fa;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.preview-card span {
  background: var(--preview-accent, #c4a35a);
  color: #1a1408;
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.85rem;
}

.summary {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.15rem;
  margin: 0;
  list-style: none;
}
.summary li {
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
}
.summary li:last-child { border-bottom: 0; }
.summary strong { color: var(--muted); font-weight: 500; display: inline-block; min-width: 5.5rem; }

.banner {
  background: #3b2f12;
  border: 1px solid #c4a35a66;
  color: #f5e6c0;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  margin-bottom: 1rem;
}

@media (max-width: 520px) {
  .color-grid { grid-template-columns: 1fr; }
}