:root {
  --kefe-ease: cubic-bezier(.2,.72,.2,1);
  --kefe-ease-soft: cubic-bezier(.22,.61,.36,1);
  --kefe-panel: #111113;
  --kefe-panel-raised: #171719;
  --kefe-line: rgba(255,255,255,.085);
  --kefe-line-strong: rgba(255,255,255,.15);
  --kefe-muted: #85858c;
  --kefe-soft: #b8b8be;
  --kefe-accent: #f2f2f0;
  --kefe-accent-ink: #0b0b0c;
}

/* KEFE is a creative instrument, not a generic settings dashboard. */
html { scroll-behavior: smooth; }
body { letter-spacing: -.008em; }

header {
  min-height: 72px;
  padding: 14px 30px;
  background: rgba(8,8,9,.82);
  border-bottom: 1px solid var(--kefe-line);
  backdrop-filter: blur(26px) saturate(1.15);
  -webkit-backdrop-filter: blur(26px) saturate(1.15);
}
.brand { width: 108px; transition: opacity .25s ease, transform .4s var(--kefe-ease); }
.brand:hover { opacity: .82; transform: translateY(-1px); }
.brand-descriptor { color: #77777d; font-size: 8.5px; }
.header-actions { gap: 7px; }

button {
  min-height: 42px;
  padding: 10px 17px;
  border-radius: 10px;
  background: #171719;
  border-color: var(--kefe-line);
  font-size: 13px;
  font-weight: 560;
  transition: background .24s var(--kefe-ease), border-color .24s var(--kefe-ease), color .24s var(--kefe-ease), transform .24s var(--kefe-ease), box-shadow .24s var(--kefe-ease);
}
button:hover { transform: translateY(-1px); background: #1d1d20; border-color: var(--kefe-line-strong); }
button:active { transform: scale(.975); }
button.primary { background: #f2f2f0; color: #0b0b0c; border-color: #f2f2f0; box-shadow: 0 8px 24px rgba(255,255,255,.08); }
button.primary:hover { background: #fff; border-color: #fff; box-shadow: 0 11px 30px rgba(255,255,255,.12); }

main { gap: 0; }
.sidebar {
  width: 430px;
  padding: 0 20px 34px;
  background: #080809;
  border-right: 1px solid var(--kefe-line);
  scroll-behavior: smooth;
}

/* A persistent index makes moving around the editor feel deliberate. */
.section-nav {
  position: sticky;
  top: 0;
  z-index: 8;
  display: grid;
  grid-template-columns: repeat(5, minmax(0,1fr));
  gap: 1px;
  margin: 0 -20px 8px;
  padding: 9px 20px 10px;
  background: rgba(8,8,9,.9);
  border-bottom: 1px solid var(--kefe-line);
  backdrop-filter: blur(22px) saturate(1.15);
  -webkit-backdrop-filter: blur(22px) saturate(1.15);
}
.section-nav-link {
  position: relative;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 8px 7px 9px;
  color: #77777d;
  text-decoration: none;
  border-radius: 8px;
  transition: color .25s var(--kefe-ease), background .25s var(--kefe-ease), transform .25s var(--kefe-ease);
}
.section-nav-link span { font: 600 9px/1 'Open Sans',sans-serif; letter-spacing: .08em; opacity: .55; }
.section-nav-link strong { font: 650 11px/1.1 'Open Sans',sans-serif; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.section-nav-link::after { content: ''; position: absolute; left: 7px; right: 7px; bottom: 3px; height: 2px; border-radius: 2px; background: transparent; transform: scaleX(.25); transform-origin: center; transition: background .3s var(--kefe-ease), transform .3s var(--kefe-ease); }
.section-nav-link:hover { color: #c8c8cd; background: rgba(255,255,255,.035); transform: translateY(-1px); }
.section-nav-link.active { color: #f4f4f2; background: rgba(255,255,255,.055); }
.section-nav-link.active::after { background: #f4f4f2; transform: scaleX(1); }

.section {
  position: relative;
  margin: 0;
  padding: 28px 4px 30px;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--kefe-line);
  border-radius: 0;
  box-shadow: none;
  scroll-margin-top: 70px;
  transition: opacity .35s var(--kefe-ease), transform .35s var(--kefe-ease);
}
.section:first-of-type { padding-top: 24px; }
.section:hover { background: transparent; border-color: var(--kefe-line-strong); box-shadow: none; }
.section h3 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 17px;
  color: #f5f5f3;
  font-size: 17px;
  line-height: 1.15;
  letter-spacing: -.025em;
  font-weight: 700;
  text-transform: none;
}
.section-index {
  color: #68686e;
  font-size: 9px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: .08em;
  transform: translateY(-1px);
}

.drop-zone {
  padding: 20px 16px;
  border: 1px dashed rgba(255,255,255,.14);
  border-radius: 12px;
  background: rgba(255,255,255,.018);
  transition: border-color .3s var(--kefe-ease), background .3s var(--kefe-ease), transform .3s var(--kefe-ease);
}
.drop-zone:hover, .drop-zone.dragover { border-color: rgba(255,255,255,.34); background: rgba(255,255,255,.035); transform: translateY(-1px); }
.file-button { min-height: 44px; padding: 10px 16px; border-radius: 10px; font-size: 12.5px; background: #19191b; }

.metadata-grid { gap: 8px; margin-top: 12px; }
.metadata-grid input {
  min-height: 44px;
  padding: 10px 12px;
  background: #111113;
  border-color: var(--kefe-line);
  border-radius: 9px;
  font-size: 13px;
  transition: border-color .25s var(--kefe-ease), background .25s var(--kefe-ease), box-shadow .25s var(--kefe-ease);
}
.metadata-grid input:hover { background: #151517; }
.metadata-grid input:focus { border-color: rgba(255,255,255,.35); box-shadow: 0 0 0 3px rgba(255,255,255,.035); }

.lyrics-actions { gap: 7px; }
.lyrics-actions button { min-height: 42px; padding: 8px 8px; border-radius: 9px; font-size: 11.5px; }
.status { margin-top: 10px; color: var(--kefe-muted); font-size: 12px; line-height: 1.45; }

.effect-buttons {
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: 7px;
  padding: 0;
  background: transparent;
  border: 0;
}
.effect-buttons button {
  min-height: 52px;
  padding: 10px 12px;
  text-align: left;
  border: 1px solid var(--kefe-line);
  border-radius: 11px;
  background: #111113;
  color: #a6a6ac;
  font-size: 12.5px;
  font-weight: 600;
  transition: transform .3s var(--kefe-ease), background .3s var(--kefe-ease), border-color .3s var(--kefe-ease), color .3s var(--kefe-ease), box-shadow .3s var(--kefe-ease);
}
.effect-buttons button:hover:not(.active-effect) { background: #18181a; color: #ededeb; border-color: rgba(255,255,255,.17); transform: translateY(-2px); }
.effect-buttons button.active-effect {
  background: #f1f1ef;
  color: #0b0b0c;
  border-color: #f1f1ef;
  box-shadow: 0 10px 28px rgba(0,0,0,.26);
  transform: translateY(-1px);
}
.effect-label {
  margin-top: 14px;
  padding: 0 2px;
  max-width: 34ch;
  color: #99999f;
  font-size: 12px;
  line-height: 1.55;
  transition: opacity .25s ease, transform .3s var(--kefe-ease);
}
#effectControls {
  margin-top: 18px;
  padding-top: 17px;
  border-top: 1px solid var(--kefe-line);
  animation: kefeReveal .38s var(--kefe-ease);
}

.control-row { margin-top: 14px; gap: 8px; }
.control-row label { color: #a8a8ae; font-size: 12.5px; }
.control-row label span { color: #eee; }
input[type="color"] { width: 38px; height: 38px; border-radius: 9px; }
select {
  min-height: 44px;
  padding: 10px 12px;
  background: #111113;
  border-color: var(--kefe-line);
  border-radius: 9px;
  font-size: 13px;
}
select:hover { border-color: var(--kefe-line-strong); background: #151517; }
.full-width { margin-top: 12px; }
.compact-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; margin-top: 8px; }

/* Preview is intentionally calm; the controls frame the canvas instead of competing with it. */
.preview {
  position: relative;
  padding: 20px 30px 22px;
  background:
    radial-gradient(circle at 50% 35%, rgba(255,255,255,.035), transparent 42%),
    radial-gradient(circle at 50% 100%, rgba(255,255,255,.018), transparent 38%),
    #000;
}
.preview-toolbar {
  width: min(1040px,100%);
  min-height: 58px;
  margin-bottom: 14px;
  padding: 8px 9px 8px 17px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  background: rgba(17,17,19,.72);
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 13px;
  box-shadow: 0 16px 42px rgba(0,0,0,.2);
  backdrop-filter: blur(24px) saturate(1.15);
  -webkit-backdrop-filter: blur(24px) saturate(1.15);
}
.preview-heading { display: flex; align-items: baseline; gap: 10px; min-width: 0; }
.preview-heading strong { color: #f5f5f3; font-size: 14px; font-weight: 700; letter-spacing: -.02em; }
.preview-heading span { color: #77777d; font-size: 11.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.preview-aspect { display: flex; align-items: center; gap: 9px; flex-shrink: 0; }
.preview-aspect-label { color: #77777d; font-size: 9px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
.preview-aspect .aspect-buttons { min-width: 222px; margin: 0; padding: 3px; gap: 2px; background: rgba(255,255,255,.045); border: 1px solid rgba(255,255,255,.06); border-radius: 9px; }
.preview-aspect .aspect-buttons button { min-height: 33px; font-size: 11.5px; border-radius: 7px; }
.preview-aspect .aspect-buttons button.active-aspect { background: #f1f1ef; color: #0b0b0c; }
.preview-aspect .aspect-info { min-width: 120px; text-align: right; }
.aspect-info { color: #74747a; font-size: 10.5px; }

.canvas-wrapper {
  width: min(1040px,100%);
  border-radius: 19px;
  transition: opacity .28s ease, transform .45s var(--kefe-ease);
}
canvas {
  border-radius: 14px;
  border-color: rgba(255,255,255,.13);
  box-shadow: 0 30px 90px rgba(0,0,0,.62), 0 0 0 1px rgba(255,255,255,.025);
  transition: box-shadow .4s var(--kefe-ease), border-color .3s var(--kefe-ease), transform .4s var(--kefe-ease);
}
canvas:hover { border-color: rgba(255,255,255,.2); box-shadow: 0 34px 100px rgba(0,0,0,.68), 0 0 0 1px rgba(255,255,255,.035); }
.transport { margin-top: 15px; min-height: 54px; padding: 9px 15px; }
.transport button { width: 37px; height: 37px; border-radius: 50%; padding: 0; }

@keyframes kefeReveal {
  from { opacity: 0; transform: translateY(-7px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1100px) {
  .sidebar { width: 390px; }
  .preview { padding-inline: 18px; }
}

@media (max-width: 860px) {
  header { padding-inline: 18px; }
  .sidebar { width: 100%; padding-inline: 18px; }
  .section-nav { margin-inline: -18px; padding-inline: 18px; }
  .preview { padding-inline: 14px; }
  .preview-toolbar { align-items: flex-start; flex-direction: column; padding: 12px 13px; }
  .preview-aspect { width: 100%; justify-content: space-between; }
  .preview-aspect .aspect-buttons { flex: 1; }
  .preview-aspect .aspect-info { min-width: auto; }
}

@media (max-width: 560px) {
  .section-nav { grid-template-columns: repeat(5, 1fr); }
  .section-nav-link strong { font-size: 9.5px; }
  .section { padding-block: 24px 26px; }
  .effect-buttons { grid-template-columns: 1fr 1fr; }
  .preview-heading span { display: none; }
  .preview-aspect { flex-wrap: wrap; }
  .preview-aspect .aspect-info { width: 100%; text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}