:root {
  --bg: #0b1014;
  --elev: #121a22;
  --ink: #eef3f7;
  --muted: #93a4b3;
  --line: rgba(238, 243, 247, 0.1);
  --accent: #5ec8ff;
  --accent-2: #3d9fd6;
  --warm: #e8b86d;
  --ok: #4ade80;
  --bad: #f87171;
  --font-display: "Noto Serif SC", serif;
  --font-body: "Noto Sans SC", sans-serif;
  --max: 1080px;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 10% -10%, rgba(94, 200, 255, 0.16), transparent 55%),
    radial-gradient(700px 380px at 90% 0%, rgba(232, 184, 109, 0.1), transparent 50%),
    var(--bg);
  line-height: 1.6;
}

a {
  color: var(--accent);
}

.wrap {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(11, 16, 20, 0.8);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-display);
  letter-spacing: 0.12em;
  font-weight: 700;
}

.brand__mark {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--warm));
}

.header-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.hero {
  padding: 2.5rem 0 1.5rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  letter-spacing: 0.04em;
  font-weight: 700;
  line-height: 1.35;
}

.hero p {
  margin: 0;
  max-width: 42rem;
  color: var(--muted);
}

.tabs {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0 1.25rem;
}

.tab {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.55rem 1.15rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.tab.is-active {
  color: #041018;
  background: linear-gradient(180deg, #7ad4ff, var(--accent-2));
  border-color: transparent;
}

.panel[hidden] {
  display: none !important;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 820px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.04), transparent 40%), var(--elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
}

.card h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.06em;
}

.field {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 0.9rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.28);
  color: var(--ink);
  padding: 0.65rem 0.75rem;
  font: inherit;
}

.field textarea {
  resize: vertical;
  min-height: 140px;
}

.field input[type="range"] {
  padding: 0;
  accent-color: var(--accent);
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.actions {
  margin: 1.1rem 0 1.5rem;
}

.btn {
  appearance: none;
  border: none;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  border-radius: 999px;
  padding: 0.8rem 1.25rem;
}

.btn--primary {
  background: linear-gradient(180deg, #7ad4ff, var(--accent-2));
  color: #041018;
}

.btn--primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(94, 200, 255, 0.4);
}

.file-btn {
  display: inline-flex;
  align-items: center;
}

.upload-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  margin-top: 0.35rem;
}

.hint {
  color: var(--muted);
  font-size: 0.85rem;
}

.check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.preview-box {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #000;
  min-height: 180px;
  margin-bottom: 0.75rem;
}

.preview-box--pan {
  min-height: 140px;
}

.preview-box--pan img {
  max-height: 220px;
}

.preview-box video,
.preview-box img,
#result-video,
#sleep-audio-preview {
  width: 100%;
  display: block;
  max-height: 280px;
  object-fit: contain;
  background: #000;
}

#sleep-audio-preview {
  margin-bottom: 0.75rem;
  max-height: none;
}

.result-card {
  margin-bottom: 2.5rem;
}

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

.status.is-running {
  color: var(--accent);
}

.status.is-done {
  color: var(--ok);
}

.status.is-failed {
  color: var(--bad);
}

.log {
  max-height: 180px;
  overflow: auto;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 10px;
  padding: 0.75rem;
  font-size: 0.78rem;
  color: var(--muted);
  white-space: pre-wrap;
}

#result-video {
  margin: 0.85rem 0;
  border-radius: 12px;
  border: 1px solid var(--line);
  max-height: 520px;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.25rem 0 2rem;
  color: var(--muted);
  font-size: 0.85rem;
}