:root {
  --bg: #f5f5f5;
  --panel: #ffffff;
  --panel-muted: #f0f0f0;
  --text: #111111;
  --muted: #5f5f5f;
  --line: #d9d9d9;
  --accent: #111111;
  --accent-contrast: #ffffff;
}

body[data-theme="night"] {
  --bg: #0b0b0b;
  --panel: #131313;
  --panel-muted: #191919;
  --text: #f5f5f5;
  --muted: #a2a2a2;
  --line: #2e2e2e;
  --accent: #ffffff;
  --accent-contrast: #111111;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "PingFang SC", sans-serif;
  color: var(--text);
  background: var(--bg);
}

.page {
  min-height: 100vh;
  padding: 24px;
}

.shell {
  width: min(100%, 1180px);
  margin: 0 auto;
  display: grid;
  gap: 18px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav__link {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  background: var(--panel);
}

.nav__link.is-current {
  color: var(--accent-contrast);
  background: var(--accent);
  border-color: var(--accent);
}

.hero,
.status-bar,
.composer,
.transport,
.playlist {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
}

.hero__eyebrow,
.playlist__label,
.status-bar__label {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 1.05;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  max-width: 12ch;
}

h2 {
  font-size: 1.5rem;
}

.hero__subtitle,
.status-bar__hint {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.theme-toggle,
.button,
.playlist__button {
  min-height: 46px;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  font: inherit;
  cursor: pointer;
}

.theme-toggle,
.button--ghost,
.playlist__button {
  color: var(--text);
  background: var(--panel-muted);
}

.button--solid {
  color: var(--accent-contrast);
  background: var(--accent);
  border-color: var(--accent);
}

.status-bar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: center;
  padding: 22px 28px;
}

.status-bar__value {
  font-size: 1.2rem;
}

.composer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  padding: 20px;
}

.composer__actions {
  display: flex;
  gap: 10px;
}

.composer input,
.control select {
  width: 100%;
  min-height: 52px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
}

.transport {
  display: grid;
  gap: 16px;
  padding: 20px;
}

.transport__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.transport__controls {
  display: grid;
  grid-template-columns: 180px minmax(260px, 1fr) 180px 150px;
  gap: 16px;
  align-items: end;
  padding: 18px;
  border-radius: 16px;
  background: var(--panel-muted);
}

.control {
  display: grid;
  gap: 8px;
}

.control--wide {
  min-width: 0;
}

.control__label {
  color: var(--muted);
  font-size: 0.9rem;
}

.control input {
  width: 100%;
}

.timebox {
  display: grid;
  gap: 8px;
}

.timebox strong {
  font-size: 1.1rem;
  font-variant-numeric: tabular-nums;
}

.playlist {
  padding: 22px;
}

.playlist__header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 16px;
}

.playlist__header-actions {
  display: grid;
  gap: 10px;
  justify-items: end;
}

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

.save-playlist {
  display: flex;
  gap: 10px;
}

.save-playlist input {
  min-width: 220px;
  min-height: 46px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
}

.playlist__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.playlist__item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel-muted);
}

.playlist__item.is-active {
  background: var(--panel);
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.playlist__meta {
  min-width: 0;
}

.playlist__index {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.playlist__title {
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.3;
  word-break: break-word;
}

.playlist__url {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.4;
  word-break: break-all;
}

.playlist__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.playlist__empty {
  padding: 24px;
  border: 1px dashed var(--line);
  border-radius: 16px;
  text-align: center;
  color: var(--muted);
  background: var(--panel-muted);
}

.youtube-host {
  position: absolute;
  width: 220px;
  height: 220px;
  left: -9999px;
  top: 0;
  opacity: 0.01;
  pointer-events: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 900px) {
  .hero,
  .status-bar,
  .composer,
  .transport__controls,
  .playlist__header,
  .playlist__item {
    grid-template-columns: 1fr;
  }

  .hero,
  .status-bar,
  .playlist__header {
    display: grid;
  }

  .composer {
    display: grid;
  }

  .composer__actions,
  .transport__buttons,
  .playlist__actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .playlist__header-actions,
  .save-playlist {
    justify-items: stretch;
  }

  .save-playlist {
    display: grid;
    grid-template-columns: 1fr;
  }
}