:root {
  color-scheme: dark;
  --bg: #09111d;
  --panel: rgba(11, 27, 44, 0.82);
  --panel-border: rgba(146, 184, 255, 0.18);
  --text: #eff6ff;
  --muted: #9db2ce;
  --accent: #77b6ff;
  --accent-strong: #b08cff;
  --danger: #ff9b9b;
  --success: #94f0bb;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(100, 149, 237, 0.2), transparent 30%),
    linear-gradient(180deg, #07101a 0%, #0a1421 100%);
  color: var(--text);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.shell {
  width: min(1200px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.hero {
  margin-bottom: 1.5rem;
}

.eyebrow,
.lede,
.subtle,
.meta,
.meta-list,
.empty-state,
.status {
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  margin-bottom: 0.75rem;
}

.lede {
  max-width: 46rem;
  line-height: 1.6;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 1.25rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.upload-panel,
.preview-grid,
.controls-panel {
  margin-top: 1rem;
}

.dropzone {
  min-height: 220px;
  border: 2px dashed rgba(119, 182, 255, 0.45);
  border-radius: 18px;
  display: grid;
  place-items: center;
  gap: 0.5rem;
  text-align: center;
  padding: 1.5rem;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
  background: rgba(12, 32, 54, 0.45);
}

.dropzone.dragover {
  transform: translateY(-1px);
  border-color: var(--accent-strong);
  background: rgba(55, 31, 92, 0.28);
}

.status,
.error {
  margin-top: 0.9rem;
}

.error {
  color: var(--danger);
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.preview-card img {
  width: 100%;
  border-radius: 14px;
  margin-top: 1rem;
  background: rgba(255, 255, 255, 0.04);
}

.panel-heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

label {
  display: grid;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.95rem;
}

input,
select,
button,
a.primary-button,
a.secondary-button {
  font: inherit;
}

input:not([type="checkbox"]),
select {
  width: 100%;
  border: 1px solid rgba(157, 178, 206, 0.2);
  border-radius: 12px;
  padding: 0.78rem 0.9rem;
  color: var(--text);
  background: rgba(8, 17, 29, 0.9);
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding-top: 1.9rem;
}

.checkbox input {
  width: 1rem;
  height: 1rem;
}

.primary-button,
.secondary-button {
  border: 0;
  border-radius: 999px;
  padding: 0.82rem 1.2rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.primary-button {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: #05101e;
  font-weight: 700;
}

.secondary-button {
  background: rgba(119, 182, 255, 0.12);
  color: var(--text);
}

.audio-output {
  margin-top: 1.2rem;
  display: grid;
  gap: 0.85rem;
}

.meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.meta-pill {
  border: 1px solid rgba(148, 240, 187, 0.24);
  border-radius: 999px;
  padding: 0.45rem 0.75rem;
  color: var(--success);
  background: rgba(45, 79, 59, 0.22);
}

audio {
  width: 100%;
}

[hidden] {
  display: none !important;
}

@media (max-width: 720px) {
  .panel-heading {
    flex-direction: column;
  }

  .checkbox {
    padding-top: 0;
  }
}