:root {
  color-scheme: dark;
  --bg: #0a0a0b;
  --panel: #141416;
  --panel-2: #1b1b1f;
  --text: #f5f3f6;
  --muted: #aaa6af;
  --line: #303036;
  --accent: #ff6f91;
  --accent-2: #d9a7ff;
  --success: #75e6b5;
  --warning: #ffcf70;
  --danger: #ff7d7d;
  --radius: 22px;
  font-family: Inter, Pretendard, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% -10%, rgba(217, 167, 255, 0.15), transparent 32rem),
    radial-gradient(circle at 90% 10%, rgba(255, 111, 145, 0.12), transparent 26rem),
    var(--bg);
}
button, input, select, textarea { font: inherit; }
button { color: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 10, 11, 0.82);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 0.8rem; color: inherit; text-decoration: none; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 2.4rem;
  aspect-ratio: 1;
  border-radius: 0.8rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #111;
  font-weight: 900;
}
.brand strong, .brand small { display: block; }
.brand small { margin-top: 0.1rem; color: var(--muted); }
.runtime-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.82rem;
}
.status-dot { width: 0.55rem; height: 0.55rem; border-radius: 50%; background: var(--warning); }
.runtime-status[data-state="ready"] .status-dot { background: var(--success); }
.runtime-status[data-state="error"] .status-dot { background: var(--danger); }

main { width: min(1480px, calc(100% - 2rem)); margin: 2rem auto 5rem; }
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(25, 25, 29, 0.96), rgba(16, 16, 18, 0.98));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.25);
}
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(300px, 0.7fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: end;
  padding: clamp(2rem, 6vw, 5rem);
}
.eyebrow { margin: 0 0 0.7rem; color: var(--accent); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.18em; }
h1 { margin: 0; max-width: 18ch; font-size: clamp(2.6rem, 6vw, 6.5rem); line-height: 0.96; letter-spacing: -0.065em; }
h2 { margin: 0; font-size: clamp(1.45rem, 2vw, 2.1rem); letter-spacing: -0.03em; }
.hero-copy { max-width: 54rem; margin: 1.6rem 0 0; color: var(--muted); line-height: 1.7; }
.architecture-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin: 0; }
.architecture-grid div { padding: 1rem; border: 1px solid var(--line); border-radius: 1rem; background: rgba(255,255,255,0.025); }
.architecture-grid dt { color: var(--muted); font-size: 0.72rem; text-transform: uppercase; }
.architecture-grid dd { margin: 0.35rem 0 0; font-weight: 700; }

.capability-panel { display: flex; justify-content: space-between; gap: 2rem; align-items: center; margin-top: 1rem; padding: 1.3rem 1.5rem; }
.capability-list { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.55rem; }
.capability-chip { padding: 0.5rem 0.7rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 0.8rem; }
.capability-chip.is-ready { color: var(--success); border-color: rgba(117, 230, 181, 0.3); }
.skeleton { width: 7rem; height: 1.8rem; border-radius: 999px; background: linear-gradient(90deg, #222, #303036, #222); background-size: 200%; animation: shimmer 1.3s infinite; }
@keyframes shimmer { to { background-position: -200% 0; } }

.tabs { display: flex; gap: 0.5rem; margin: 1.5rem 0 0.75rem; }
.tab, .segmented button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  padding: 0.75rem 1rem;
  cursor: pointer;
}
.tab.is-active, .segmented button.is-active { border-color: transparent; background: var(--text); color: #111; font-weight: 800; }

.workspace { display: none; grid-template-columns: minmax(300px, 0.42fr) minmax(0, 1fr); gap: 1rem; }
.workspace.is-active { display: grid; }
.control-panel, .preview-panel { padding: clamp(1.2rem, 2.4vw, 2rem); }
.section-heading { margin-bottom: 1.5rem; }
.section-heading p:last-child { margin: 0.65rem 0 0; color: var(--muted); }
.field, .field-group { display: grid; gap: 0.5rem; margin: 1rem 0; border: 0; padding: 0; }
.field > span, .field-group legend { font-size: 0.82rem; font-weight: 750; }
.field small { color: var(--muted); line-height: 1.45; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  background: var(--panel-2);
  color: var(--text);
  padding: 0.8rem 0.9rem;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(255, 111, 145, 0.12); }
input[type="file"] { padding: 0.65rem; }
.token-field input { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.compact { margin: 0; }
.toggle-field { display: flex; align-items: center; gap: 0.7rem; margin: 1rem 0; color: var(--muted); }
.toggle-field input { width: auto; accent-color: var(--accent); }
.segmented { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.45rem; }
.segmented button { border-radius: 0.8rem; padding-inline: 0.4rem; }
.button-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; margin-top: 1.3rem; }
.button { border: 0; border-radius: 0.9rem; padding: 0.85rem 1rem; cursor: pointer; font-weight: 800; }
.button.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #111; }
.button.secondary { background: #25252a; color: var(--text); border: 1px solid var(--line); }
.button.danger { background: rgba(255, 125, 125, 0.12); color: var(--danger); border: 1px solid rgba(255, 125, 125, 0.35); }
.button:disabled { opacity: 0.4; cursor: not-allowed; }
.notice { margin: 1.2rem 0 0; padding: 0.9rem; border-radius: 0.9rem; background: rgba(255, 207, 112, 0.08); color: #e8d39e; font-size: 0.8rem; line-height: 1.55; }

.preview-toolbar { display: flex; justify-content: space-between; align-items: end; gap: 1rem; margin-bottom: 0.9rem; }
.preview-toolbar div { display: grid; gap: 0.25rem; }
.preview-label, .drag-hint { color: var(--muted); font-size: 0.75rem; }
.canvas-shell { display: grid; place-items: center; min-height: 32rem; overflow: auto; border: 1px solid var(--line); border-radius: 1.2rem; background: #0d0d0f; }
.checkerboard { background-color: #111; background-image: linear-gradient(45deg,#19191c 25%,transparent 25%),linear-gradient(-45deg,#19191c 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#19191c 75%),linear-gradient(-45deg,transparent 75%,#19191c 75%); background-size: 24px 24px; background-position: 0 0,0 12px,12px -12px,-12px 0; }
canvas { display: block; max-width: 100%; max-height: 72vh; width: auto; height: auto; cursor: grab; }
canvas:active { cursor: grabbing; }
.poster-shell canvas { max-height: 68vh; cursor: default; }
.feedback { min-height: 1.25rem; margin: 0.85rem 0 0; color: var(--muted); font-size: 0.84rem; }
.feedback.is-success { color: var(--success); }
.feedback.is-error { color: var(--danger); }
.request-preview, .provider-response { max-height: 18rem; overflow: auto; margin: 1rem 0 0; padding: 0.9rem; border-radius: 0.9rem; background: #0d0d0f; color: #cfcbd3; font-size: 0.72rem; white-space: pre-wrap; word-break: break-word; }

.generation-result {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.025);
}
.result-toolbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.result-toolbar > div { display: grid; gap: 0.35rem; min-width: 0; }
.result-toolbar code { color: var(--muted); font-size: 0.72rem; overflow-wrap: anywhere; }
.generated-image-link { display: block; margin-top: 1rem; border-radius: 0.85rem; overflow: hidden; border: 1px solid var(--line); background: #0d0d0f; }
.generated-image-link img { display: block; width: 100%; height: auto; max-height: 70vh; object-fit: contain; }

footer { display: flex; justify-content: space-between; gap: 1rem; width: min(1480px, calc(100% - 2rem)); margin: 0 auto 2rem; color: var(--muted); font-size: 0.78rem; }

@media (max-width: 900px) {
  .hero, .workspace { grid-template-columns: 1fr; }
  .hero { align-items: start; }
  .capability-panel { align-items: flex-start; flex-direction: column; }
  .capability-list { justify-content: flex-start; }
  .canvas-shell { min-height: 22rem; }
}
@media (max-width: 560px) {
  main { width: min(100% - 1rem, 1480px); margin-top: 0.5rem; }
  .site-header { padding: 0.75rem; }
  .brand small, .runtime-status span:last-child { display: none; }
  .hero, .control-panel, .preview-panel { padding: 1.1rem; }
  .architecture-grid { grid-template-columns: 1fr; }
  .button-row, .field-row { grid-template-columns: 1fr; }
  .result-toolbar { flex-direction: column; }
  footer { flex-direction: column; width: calc(100% - 1rem); }
}