.bgm-main { width: 100%; max-width: 920px; margin: 0 auto; }
.bgm-title { margin-bottom: 24px; }
.bgm-title p { margin: 0 0 6px; color: var(--color-text-muted); font-size: 0.76rem; }
.bgm-title p:last-child { margin-top: 6px; }
.bgm-title a { color: inherit; text-decoration: none; }
.bgm-title a:hover { color: var(--color-primary); }
.bgm-title h2 { margin: 0; font-size: 1.25rem; }
.bgm-section { border-top: 1px solid var(--color-border); padding: 20px 0 24px; }
.bgm-section:last-child { border-bottom: 1px solid var(--color-border); }
.bgm-view-tabs, .bgm-format-tabs, .bgm-inline-actions { display: inline-flex; gap: 4px; }
.bgm-view-tabs { margin-bottom: 0; }
.bgm-view-tab, .bgm-format-tab, .bgm-button, .bgm-icon-button { border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-control); color: var(--color-text-muted); cursor: pointer; }
.bgm-view-tab, .bgm-format-tab { min-height: 34px; padding: 6px 10px; font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace; font-size: 0.72rem; font-weight: 700; }
.bgm-view-tab.is-active, .bgm-format-tab.is-active, .bgm-view-tab:hover, .bgm-format-tab:hover, .bgm-button:hover, .bgm-icon-button:hover { border-color: var(--color-primary); color: var(--color-primary); }
.bgm-view-tab.is-active, .bgm-format-tab.is-active, .bgm-button.is-primary, .bgm-icon-button.is-primary { border-color: var(--color-primary); background: var(--color-primary); color: #ffffff; }
.bgm-view-tab span { margin-left: 3px; font-size: 0.62rem; }
.bgm-toolbar { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 12px; }
.bgm-search, .bgm-playlist-create input, .bgm-playlist-import input, .bgm-sleep-input { min-width: 0; min-height: 38px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-control); color: var(--color-text); padding: 7px 10px; }
.bgm-icon-button { width: 34px; height: 34px; display: inline-flex; align-items: center; justify-content: center; font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace; font-size: 0.78rem; }
.bgm-icon-button.is-favorite { color: #fbbf24; border-color: #fbbf24; }
.bgm-icon-button.is-active { border-color: var(--color-primary); background: var(--color-primary); color: #ffffff; }
.bgm-icon-button.is-danger:hover { border-color: #fca5a5; color: #fca5a5; }
.bgm-icon-button:disabled, .bgm-button:disabled { cursor: not-allowed; opacity: 0.4; }
.bgm-list-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 16px 0 8px; }
.bgm-list-head h3 { margin: 0; font-size: 0.9rem; }
.bgm-list-head span { color: var(--color-text-muted); font-size: 0.7rem; }
.bgm-track-list, .bgm-picker-list, .bgm-playlist-list { display: grid; gap: 7px; }
.bgm-track-list { max-height: 520px; overflow: auto; overflow-anchor: none; scrollbar-gutter: stable; padding-right: 4px; }
#bgm-library-panel > .bgm-track-list { height: clamp(300px, 52vh, 520px); }
.bgm-track { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 10px; min-height: 58px; padding: 9px 10px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.bgm-track.is-current { border-color: var(--color-primary); }
.bgm-track-title { min-width: 0; display: grid; gap: 2px; }
.bgm-track-title strong, .bgm-track-title span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bgm-track-title strong { font-size: 0.82rem; }
.bgm-track-title span, .bgm-time { color: var(--color-text-muted); font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace; font-size: 0.65rem; }
.bgm-format-tag { border: 1px solid var(--color-border); color: var(--color-text-muted); font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace; font-size: 0.62rem; padding: 2px 5px; }
.bgm-track-actions { display: flex; gap: 5px; }
.bgm-empty { margin: 0; padding: 30px 12px; color: var(--color-text-muted); font-size: 0.8rem; text-align: center; }
.bgm-status { min-height: 1.6em; margin: 10px 0 0; color: var(--color-text-muted); font-size: 0.74rem; }
.bgm-status.is-error { color: #fca5a5; }
.bgm-playlist-create, .bgm-playlist-import { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; margin-bottom: 10px; }
.bgm-button { min-height: 38px; padding: 6px 10px; font-size: 0.72rem; font-weight: 700; }
.bgm-playlist { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 7px; align-items: center; padding: 7px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.bgm-playlist.is-active { border-color: var(--color-primary); }
.bgm-playlist-select { min-width: 0; display: grid; gap: 2px; border: 0; background: transparent; color: var(--color-text); cursor: pointer; padding: 5px; text-align: left; }
.bgm-playlist-select strong, .bgm-playlist-select span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bgm-playlist-select strong { font-size: 0.8rem; }
.bgm-playlist-select span { color: var(--color-text-muted); font-size: 0.68rem; }
.bgm-playlist-detail { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--color-border); }
.bgm-picker-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 18px 0 10px; }
.bgm-picker-head h4 { margin: 0; font-size: 0.82rem; }
.bgm-picker-list { max-height: 360px; overflow: auto; margin-top: 10px; padding-right: 4px; }
.bgm-picker-track { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 8px; min-height: 40px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); color: var(--color-text); cursor: pointer; padding: 6px 9px; text-align: left; }
.bgm-picker-track:hover, .bgm-picker-track.is-added { border-color: var(--color-primary); }
.bgm-picker-track strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 0.74rem; }
.bgm-picker-track span { color: var(--color-text-muted); font-size: 0.65rem; }
.bgm-picker-track span:last-child { color: var(--color-primary); font-size: 0.88rem; }
.bgm-player { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 14px; padding: 14px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.bgm-player-title { min-width: 0; }
.bgm-player-title strong, .bgm-player-title span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bgm-player-title strong { font-size: 0.88rem; }
.bgm-player-title span { color: var(--color-text-muted); font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace; font-size: 0.66rem; }
.bgm-player-actions { display: flex; gap: 5px; }
.bgm-player-controls { display: grid; grid-template-columns: auto auto auto minmax(150px, 1fr) auto; align-items: center; gap: 8px; grid-column: 1 / -1; }
.bgm-progress, .bgm-volume { width: 100%; accent-color: var(--color-primary); }
.bgm-volume { width: 90px; }
.bgm-sleep-input { width: 56px; min-height: 32px; padding: 3px 6px; }
.bgm-sheet-backdrop { position: fixed; inset: 0; z-index: 40; background: rgb(0 0 0 / 0.58); opacity: 0; pointer-events: none; transition: opacity 0.24s ease; }
.bgm-sheet-backdrop[hidden], .bgm-detail-sheet[hidden] { display: none; }
.bgm-sheet-backdrop.is-open { opacity: 1; pointer-events: auto; }
.bgm-detail-sheet { position: fixed; right: 0; bottom: 0; left: 0; z-index: 50; max-height: min(90dvh, 680px); overflow: hidden; border: 1px solid var(--color-border); border-bottom: 0; border-radius: 8px 8px 0 0; background: var(--color-surface); color: var(--color-text); transform: translateY(100%); transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1); }
.bgm-detail-sheet.is-open { transform: translateY(0); }
.bgm-sheet-handle { display: block; width: 52px; height: 22px; margin: 0 auto; border: 0; background: transparent; cursor: pointer; }
.bgm-sheet-handle::before { content: ""; display: block; width: 36px; height: 4px; margin: 9px auto; border-radius: 2px; background: var(--color-border); }
.bgm-sheet-body { width: min(680px, 100%); max-height: calc(min(90dvh, 680px) - 22px); margin: 0 auto; overflow-y: auto; padding: 8px 20px 24px; }
.bgm-sheet-now { display: grid; gap: 3px; text-align: center; }
.bgm-sheet-now strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 1rem; }
.bgm-sheet-now span { color: var(--color-text-muted); font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace; font-size: 0.68rem; }
.bgm-sheet-progress { margin-top: 18px; }
.bgm-sheet-times { display: flex; justify-content: space-between; color: var(--color-text-muted); font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace; font-size: 0.66rem; }
.bgm-sheet-controls { display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: 14px; }
.bgm-sheet-play { width: 46px; height: 46px; border-radius: 50%; font-size: 1rem; }
.bgm-sheet-options { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 10px 14px; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--color-border); }
.bgm-sheet-options label, .bgm-sheet-timer label { color: var(--color-text-muted); font-size: 0.7rem; }
.bgm-sheet-options select { min-height: 36px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-control); color: var(--color-text); padding: 4px 8px; }
.bgm-sheet-volume { display: flex; align-items: center; gap: 10px; }
.bgm-sheet-volume .bgm-volume { flex: 1; width: auto; }
.bgm-sheet-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 16px; }
.bgm-sheet-action { min-height: 62px; display: grid; place-items: center; gap: 2px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-control); color: var(--color-text-muted); cursor: pointer; font-size: 0.68rem; }
.bgm-sheet-action span { font-size: 1rem; }
.bgm-sheet-action:hover, .bgm-sheet-action.is-favorite { border-color: var(--color-primary); color: var(--color-primary); }
.bgm-sheet-action:disabled { cursor: not-allowed; opacity: 0.4; }
.bgm-sheet-timer { display: grid; grid-template-columns: auto 58px auto auto minmax(0, 1fr); align-items: center; gap: 8px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--color-border); }
body.bgm-sheet-open { overflow: hidden; }
@media (max-width: 620px) { .bgm-toolbar { grid-template-columns: 1fr auto; } .bgm-search { grid-column: 1 / -1; grid-row: 2; } .bgm-player { grid-template-columns: 1fr; } .bgm-player-controls { grid-template-columns: auto auto auto minmax(0, 1fr) auto; } }
@media (max-width: 430px) { .bgm-track { grid-template-columns: minmax(0, 1fr) auto; } .bgm-format-tag { display: none; } .bgm-playlist-create, .bgm-playlist-import { grid-template-columns: 1fr; } .bgm-player-controls { grid-template-columns: auto auto auto minmax(0, 1fr); } .bgm-player-controls > .bgm-time { grid-column: 1 / -1; } .bgm-sheet-body { padding-right: 14px; padding-left: 14px; } .bgm-sheet-timer { grid-template-columns: auto 58px auto auto; } .bgm-sheet-timer .bgm-time { grid-column: 1 / -1; } }