:root {
  color-scheme: dark;
  --bg: #080a10;
  --bg-2: #10141d;
  --panel: rgba(18, 22, 31, 0.88);
  --line: rgba(255, 247, 234, 0.12);
  --text: #fff7ea;
  --muted: rgba(255, 247, 234, 0.62);
  --dim: rgba(255, 247, 234, 0.38);
  --mint: #86f5c3;
  --rose: #ffd9eb;
  --danger: #ff6f61;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: "Avenir Next", "Segoe UI", "PingFang SC", "Noto Sans SC", sans-serif;
  --mono: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 14% 0%, rgba(134, 245, 195, 0.14), transparent 34%),
    radial-gradient(circle at 88% 8%, rgba(255, 217, 235, 0.12), transparent 30%),
    radial-gradient(circle at 50% 100%, rgba(40, 50, 80, 0.35), transparent 40%),
    var(--bg);
}
.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.08;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 4vw;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(8, 10, 16, 0.72);
}
.brand {
  display: inline-flex;
  gap: 0.7rem;
  align-items: center;
  text-decoration: none;
  color: var(--text);
}
.brand-mark {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--mint);
  color: var(--mint);
  font-family: var(--serif);
  border-radius: 999px;
}
.brand-text {
  letter-spacing: 0.16em;
  font-size: 0.85rem;
}
.brand-text .dim { color: var(--dim); }
.nav-links {
  display: flex;
  gap: 1.25rem;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}
.nav-links a:hover { color: var(--text); }

main { padding: 0 4vw 5rem; max-width: 1280px; margin: 0 auto; }

.hero {
  padding: 5.5rem 0 3.5rem;
  max-width: 48rem;
}
.kicker {
  margin: 0 0 0.85rem;
  color: var(--mint);
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-family: var(--mono);
}
.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}
.hero h1 em {
  font-style: italic;
  color: var(--rose);
}
.lead {
  margin: 1.25rem 0 1.75rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 38rem;
}
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.hero-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
  color: var(--dim);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  padding: 0.75rem 1.15rem;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}
.btn:hover { border-color: rgba(255,247,234,0.28); transform: translateY(-1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn.primary {
  background: linear-gradient(135deg, rgba(134,245,195,0.18), rgba(255,217,235,0.12));
  border-color: rgba(134,245,195,0.45);
  color: var(--text);
}
.btn.wide { width: 100%; }
.btn.ghost { background: transparent; }

.section-head { margin: 2.5rem 0 1.25rem; }
.section-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}
.row-between { display: flex; justify-content: space-between; align-items: end; gap: 1rem; }

.studio-grid {
  display: grid;
  grid-template-columns: 1.05fr 1.15fr 0.95fr;
  gap: 1rem;
}
@media (max-width: 980px) {
  .studio-grid { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1rem 1rem 1.15rem;
  backdrop-filter: blur(10px);
  min-height: 22rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.panel-label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--dim);
  font-family: var(--mono);
}

.dropzone {
  display: block;
  border: 1px dashed rgba(255,247,234,0.22);
  border-radius: 14px;
  min-height: 220px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  background: rgba(255,255,255,0.02);
  transition: border-color 160ms ease, background 160ms ease;
}
.dropzone:hover, .dropzone.dragover {
  border-color: rgba(134,245,195,0.55);
  background: rgba(134,245,195,0.04);
}
.dropzone-inner {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 0.35rem;
  text-align: center;
  color: var(--muted);
  padding: 1rem;
}
.dropzone-inner strong { color: var(--text); font-weight: 500; }
.preview {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}
.field {
  display: grid;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.field.grow { flex: 1; }
.field select, .field textarea, .field input {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.25);
  color: var(--text);
  padding: 0.65rem 0.75rem;
  font: inherit;
}
.field textarea { resize: vertical; min-height: 7rem; }
.toggle {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.status {
  min-height: 1.25rem;
  margin: 0;
  color: var(--mint);
  font-size: 0.85rem;
}
.status.error { color: var(--danger); }

.breakdown {
  display: grid;
  gap: 0.55rem;
  max-height: 220px;
  overflow: auto;
  padding-right: 0.25rem;
}
.breakdown.empty { color: var(--dim); font-size: 0.92rem; }
.bd-item {
  border-top: 1px solid var(--line);
  padding-top: 0.45rem;
}
.bd-item .lab {
  display: block;
  color: var(--mint);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  margin-bottom: 0.15rem;
}
.bd-item .val { color: var(--muted); font-size: 0.9rem; }

.image-type {
  border: 1px solid rgba(134,245,195,0.25);
  background: rgba(134,245,195,0.06);
  border-radius: 12px;
  padding: 0.7rem 0.8rem;
  font-size: 0.88rem;
  color: var(--muted);
}
.image-type strong { color: var(--text); }

.row { display: flex; gap: 0.6rem; flex-wrap: wrap; }

.output-frame {
  flex: 1;
  min-height: 260px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.22);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.output-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #0b0d12;
}
.output-link {
  color: var(--mint);
  font-size: 0.85rem;
  word-break: break-all;
}

.history-list {
  display: grid;
  gap: 0.85rem;
}
.history-card {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 0.85rem;
  background: rgba(18, 22, 31, 0.72);
}
.history-card img {
  width: 112px;
  height: 112px;
  object-fit: cover;
  border-radius: 10px;
  background: #111;
}
.history-card h3 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  font-weight: 500;
}
.history-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}
.history-card .meta {
  margin-top: 0.45rem;
  color: var(--dim);
  font-size: 0.75rem;
  font-family: var(--mono);
}
.history-actions {
  margin-top: 0.55rem;
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}
.history-actions button {
  font-size: 0.78rem;
  padding: 0.4rem 0.7rem;
}

.muted { color: var(--muted); }
.dim { color: var(--dim); }

.footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 4vw 2.5rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--dim);
  font-size: 0.82rem;
}

.rv {
  opacity: 0;
  transform: translateY(18px);
  animation: rise 700ms cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
}
.studio.rv { animation-delay: 80ms; }
.history.rv { animation-delay: 140ms; }
@keyframes rise {
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .rv { animation: none; opacity: 1; transform: none; }
  .btn { transition: none; }
}