:root {
  color-scheme: dark;
  --bg: #101114;
  --panel: #181a20;
  --panel-strong: #20242c;
  --line: rgba(255, 255, 255, 0.14);
  --text: #f6f1ea;
  --muted: #b9bdc8;
  --soft: #858b99;
  --rose: #ec6f8e;
  --teal: #55d8c1;
  --gold: #e9bc61;
  --blue: #6aa7ff;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 8%, rgba(85, 216, 193, 0.18), transparent 28rem),
    radial-gradient(circle at 84% 24%, rgba(236, 111, 142, 0.16), transparent 25rem),
    linear-gradient(140deg, #101114 0%, #171b20 46%, #0d1017 100%);
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 440px);
  gap: 22px;
  align-items: center;
  padding: 28px 0;
}

.selector-panel,
.result-panel {
  min-width: 0;
}

.selector-panel {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(24, 26, 32, 0.78);
  box-shadow: var(--shadow);
}

.masthead {
  position: relative;
  min-height: clamp(260px, 42vh, 430px);
  display: flex;
  align-items: end;
  overflow: hidden;
}

.masthead__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.02);
}

.masthead__shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(0deg, rgba(16, 17, 20, 0.94), rgba(16, 17, 20, 0.14) 62%),
    linear-gradient(90deg, rgba(16, 17, 20, 0.5), transparent);
}

.masthead__content {
  position: relative;
  padding: clamp(24px, 4vw, 44px);
}

.date-line {
  margin: 0 0 10px;
  color: var(--teal);
  font-size: 0.86rem;
  font-weight: 700;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 10em;
  margin-bottom: 0;
  font-size: clamp(2.15rem, 5vw, 4.25rem);
  line-height: 1;
  letter-spacing: 0;
}

.controls {
  padding: 0 clamp(20px, 4vw, 36px) clamp(22px, 4vw, 34px);
}

fieldset {
  min-width: 0;
  padding: 0;
  margin: 0;
  border: 0;
}

legend,
.range-control span,
.select-control span {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.chip-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.mood-chip,
.primary-action,
.icon-action,
.link-row a {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  background: var(--panel-strong);
  cursor: pointer;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease;
}

.mood-chip {
  padding: 10px 8px;
  white-space: nowrap;
}

.mood-chip[aria-pressed="true"] {
  border-color: rgba(85, 216, 193, 0.75);
  background: rgba(85, 216, 193, 0.18);
}

.mood-chip:hover,
.primary-action:hover,
.icon-action:hover,
.link-row a:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.32);
}

.control-group + .control-row,
.control-row + .control-group,
.control-group + .action-row {
  margin-top: 22px;
}

.control-row {
  display: grid;
  grid-template-columns: 1fr 150px;
  gap: 14px;
}

.range-control,
.select-control {
  display: grid;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--rose);
}

select {
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  background: var(--panel-strong);
}

.toggle-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.toggle-grid label {
  display: flex;
  gap: 8px;
  align-items: center;
  min-height: 44px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(32, 36, 44, 0.72);
  color: var(--muted);
}

input[type="checkbox"] {
  accent-color: var(--gold);
}

.action-row {
  display: flex;
  gap: 10px;
}

.primary-action {
  flex: 1;
  border-color: rgba(236, 111, 142, 0.7);
  background: linear-gradient(135deg, rgba(236, 111, 142, 0.95), rgba(233, 188, 97, 0.85));
  color: #151216;
  font-weight: 800;
}

.icon-action {
  width: 48px;
  flex: 0 0 48px;
  font-size: 1.12rem;
}

.icon-action.ghost {
  min-height: 38px;
  width: 42px;
  flex-basis: 42px;
  background: rgba(255, 255, 255, 0.06);
}

.icon-action.is-favorite {
  border-color: rgba(233, 188, 97, 0.85);
  background: rgba(233, 188, 97, 0.16);
  color: var(--gold);
}

.result-panel {
  display: grid;
  gap: 16px;
}

.now-card,
.queue-section,
.library-section {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(24, 26, 32, 0.86);
  box-shadow: var(--shadow);
}

.now-card {
  padding: 26px;
}

.now-card__topline,
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.now-card__topline span,
.section-heading span {
  color: var(--teal);
  font-size: 0.82rem;
  font-weight: 800;
}

.top-actions {
  display: flex;
  gap: 8px;
}

h2 {
  margin: 18px 0 8px;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: 0;
}

#songAlbum {
  margin-bottom: 18px;
  color: var(--gold);
  font-weight: 700;
}

#songReason {
  min-height: 4.6em;
  margin-bottom: 22px;
  color: var(--muted);
  line-height: 1.8;
}

.link-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.link-row a {
  display: grid;
  place-items: center;
  padding: 0 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
}

.queue-section,
.library-section {
  padding: 22px;
}

.library-section summary {
  cursor: pointer;
  color: var(--text);
  font-weight: 800;
}

.library-list {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 16px 0 0;
  list-style: none;
  max-height: 340px;
  overflow: auto;
}

.library-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.library-list__text {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.library-list strong {
  font-size: 0.95rem;
}

.library-list span {
  color: var(--soft);
  font-size: 0.82rem;
}

.library-favorite-button {
  min-width: 38px;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--gold);
  background: rgba(255, 255, 255, 0.05);
  cursor: pointer;
}

.section-heading h3 {
  margin: 0;
  font-size: 1rem;
}

.queue-list {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 16px 0 0;
  list-style: none;
}

.queue-list li {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.045);
  overflow: hidden;
}

.queue-track {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  width: 100%;
  min-height: 64px;
  padding: 14px;
  border: 0;
  color: var(--text);
  text-align: left;
  background: transparent;
  cursor: pointer;
}

.queue-track__text {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.queue-track__favorite {
  flex: 0 0 auto;
  color: var(--soft);
  font-size: 1.1rem;
}

.queue-track.is-favorite .queue-track__favorite {
  color: var(--gold);
}

.queue-track:hover,
.queue-track.is-active {
  background: rgba(85, 216, 193, 0.12);
}

.queue-list strong {
  font-size: 0.98rem;
}

.queue-list span {
  color: var(--soft);
  font-size: 0.84rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translate(-50%, 18px);
  max-width: calc(100% - 32px);
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(16, 17, 20, 0.94);
  color: var(--text);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .result-panel {
    padding-bottom: 28px;
  }
}

@media (max-width: 620px) {
  .app-shell {
    width: min(100% - 20px, 1180px);
    padding: 10px 0;
    gap: 10px;
  }

  .chip-grid,
  .toggle-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .control-row,
  .link-row {
    grid-template-columns: 1fr;
  }

  .masthead {
    min-height: 300px;
  }

  .now-card,
  .queue-section {
    padding: 18px;
  }
}