.codex-bg-music-toggle {
    position: fixed;
    z-index: 9999;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: rgba(20, 20, 20, 0.88);
    color: #fff;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    font: 600 14px/1 Arial, sans-serif;
}

.codex-bg-music-toggle-hidden {
    display: none;
}

.codex-bg-music-toggle.is-forced-visible {
    display: inline-flex;
}

.codex-bg-music-toggle-icon {
    width: 24px;
    height: 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.codex-bg-music-default-icon,
.codex-bg-music-custom-icon,
.codex-bg-music-default-icon svg {
    width: 24px;
    height: 24px;
    display: block;
}

.codex-bg-music-speaker,
.codex-bg-music-slash,
.codex-bg-music-wave {
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.codex-bg-music-speaker {
    fill: currentColor;
    stroke: currentColor;
}

.codex-bg-music-toggle.is-playing .codex-bg-music-slash {
    opacity: 0;
}

.codex-bg-music-wave.wave-1 {
    opacity: 0.75;
}

.codex-bg-music-wave.wave-2 {
    opacity: 0.55;
}

.codex-bg-music-wave.wave-3 {
    opacity: 0.9;
}

.codex-bg-music-custom-icon {
    display: none;
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
}

.codex-bg-music-toggle.has-custom-icon-on.is-playing .codex-bg-music-default-icon,
.codex-bg-music-toggle.has-custom-icon-off:not(.is-playing) .codex-bg-music-default-icon {
    display: none;
}

.codex-bg-music-toggle.has-custom-icon-on.is-playing .codex-bg-music-custom-icon-on,
.codex-bg-music-toggle.has-custom-icon-off:not(.is-playing) .codex-bg-music-custom-icon-off {
    display: block;
}

.codex-bg-music-preview {
    position: relative;
    width: 360px;
    height: 260px;
    overflow: hidden;
    border: 1px solid #d5d9dd;
    border-radius: 16px;
    background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0) 42%),
        linear-gradient(135deg, #eef3f8 0%, #dde7f1 58%, #d5e1ed 100%);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.7),
        0 18px 40px rgba(35, 52, 71, 0.08);
}

.bgm-preview-cell {
    padding-bottom: 96px !important;
}

.codex-bg-music-preview-canvas {
    position: absolute;
    inset: 0;
}

.codex-bg-music-preview-card {
    position: absolute;
    left: 20px;
    right: 20px;
    top: 44px;
    padding: 14px 16px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.82);
    color: #40556b;
    font: 13px/1.4 Arial, sans-serif;
    box-shadow: 0 12px 28px rgba(72, 94, 116, 0.12);
    backdrop-filter: blur(8px);
}

.codex-bg-music-preview-title {
    font-weight: 700;
    color: #223447;
}

.codex-bg-music-preview-note {
    margin-top: 4px;
}

.codex-bg-music-preview-browser {
    position: absolute;
    top: 14px;
    left: 16px;
    display: flex;
    gap: 6px;
}

.codex-bg-music-preview-browser .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.codex-bg-music-preview-browser .red {
    background: #ff7f73;
}

.codex-bg-music-preview-browser .yellow {
    background: #ffc84b;
}

.codex-bg-music-preview-browser .green {
    background: #41d38a;
}

.codex-bg-music-preview-panel {
    position: absolute;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.34);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.codex-bg-music-preview-panel.panel-a {
    right: 20px;
    top: 42px;
    width: 122px;
    height: 72px;
}

.codex-bg-music-preview-panel.panel-b {
    left: 20px;
    bottom: 86px;
    width: 170px;
    height: 54px;
}

.codex-bg-music-preview-orb {
    position: absolute;
    border-radius: 999px;
    filter: blur(4px);
    opacity: 0.55;
}

.codex-bg-music-preview-orb.orb-a {
    right: 28px;
    top: 26px;
    width: 84px;
    height: 84px;
    background: radial-gradient(circle, rgba(99, 174, 255, 0.7) 0%, rgba(99, 174, 255, 0) 72%);
}

.codex-bg-music-preview-orb.orb-b {
    left: 140px;
    bottom: 20px;
    width: 98px;
    height: 98px;
    background: radial-gradient(circle, rgba(79, 217, 165, 0.48) 0%, rgba(79, 217, 165, 0) 72%);
}

.codex-bg-music-preview .codex-bg-music-toggle {
    position: absolute;
    z-index: 1;
}

.codex-bg-music-preview-status {
    position: absolute;
    left: 18px;
    bottom: 78px;
    display: inline-flex;
    gap: 8px;
    align-items: center;
    color: #51677c;
    font: 12px/1.2 Arial, sans-serif;
}

.codex-bg-music-preview-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #9fb3c8;
}

.codex-bg-music-preview-status.is-playing .codex-bg-music-preview-dot {
    background: #2e9b57;
}

.bgm-file-status {
    margin-top: 8px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.bgm-file-badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 10px;
    border-radius: 999px;
    background: #e7f7ec;
    color: #1f7a43;
    font: 700 12px/1 Arial, sans-serif;
}

.bgm-rules-panel {
    padding: 18px;
    border: 1px solid #dbe4eb;
    border-radius: 14px;
    background: linear-gradient(180deg, #f8fbfd 0%, #f2f7fa 100%);
}

.bgm-rules-list {
    display: grid;
    gap: 16px;
}

.bgm-rule-card {
    padding: 16px 18px 18px;
    border: 1px solid #dbe4eb;
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 8px 24px rgba(54, 76, 96, 0.06);
}

.bgm-rule-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 14px;
}

.bgm-rule-card-title {
    color: #203447;
    font: 700 14px/1.2 Arial, sans-serif;
}

.bgm-rules-list {
    counter-reset: bgm-rule-card;
}

.bgm-rule-card {
    counter-increment: bgm-rule-card;
}

.bgm-rule-card-title::after {
    content: " " counter(bgm-rule-card);
}

.bgm-rule-card-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 12px;
    align-items: flex-end;
    justify-content: flex-end;
}

.bgm-rule-sort-block {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.bgm-rule-sort-input {
    width: 86px;
}

.bgm-rule-grid {
    display: grid;
    gap: 14px 16px;
}

.bgm-rule-grid-main {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.bgm-rule-grid-secondary {
    margin-top: 14px;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: end;
}

.bgm-rule-field-span-2 {
    grid-column: span 2;
}

.bgm-rule-field-span-3 {
    grid-column: span 3;
}

.bgm-rule-label {
    display: block;
    margin-bottom: 6px;
    color: #607286;
    font: 700 12px/1.2 Arial, sans-serif;
}

.bgm-rule-field input[type="text"],
.bgm-rule-field input[type="number"],
.bgm-rule-field select {
    width: 100%;
    box-sizing: border-box;
}

.bgm-rule-field-file input[type="file"] {
    max-width: 100%;
}

.bgm-rule-file-area {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.bgm-rule-delete-file {
    display: inline-flex;
    gap: 8px;
    align-items: flex-start;
    margin-top: 8px;
    color: #586c80;
    font: 13px/1.3 Arial, sans-serif;
}

.bgm-rule-toggle {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    min-height: 39px;
    padding: 12px 14px;
    border: 1px solid #dfe8ef;
    border-radius: 12px;
    background: #f8fbfd;
    color: #314658;
    font: 600 13px/1.2 Arial, sans-serif;
    box-sizing: border-box;
}

.bgm-rule-toggle input[type="checkbox"] {
    margin: 0;
}

.bgm-rule-field-compact input[type="number"] {
    max-width: 100px;
}

.bgm-rules-footer {
    margin-top: 14px;
}

@media (max-width: 1450px) {
    .bgm-rule-grid-secondary {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 1180px) {
    .bgm-rule-card-header {
        flex-direction: column;
        align-items: stretch;
    }

    .bgm-rule-card-controls {
        justify-content: flex-start;
    }

    .bgm-rule-grid-main {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .bgm-rule-field-span-3 {
        grid-column: span 2;
    }
}

@media (max-width: 900px) {
    .bgm-rule-grid-main,
    .bgm-rule-grid-secondary {
        grid-template-columns: 1fr;
    }

    .bgm-rule-field-span-2,
    .bgm-rule-field-span-3 {
        grid-column: span 1;
    }
}