body {
    margin: 0;
    padding: 0;
    background-color: #0a0a0a;
    overflow: hidden;
}

:root {
    --side-panel-width: 240px;
    --side-panel-safe-space: 344px;
}

#canvas-container {
    width: 100vw;
    height: 100vh;
    display: block;
}

.hidden {
    opacity: 0;
    pointer-events: none;
}

#dashboard-shell {
    position: fixed;
    inset: 0;
    z-index: 20;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.panel-shell,
#side-panel,
#stats-header,
#playback-controls {
    pointer-events: auto;
}

.panel-shell {
    position: fixed;
    top: 18px;
    left: 18px;
    z-index: 25;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 0;
    background: none;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

#stats-header {
    display: flex;
    flex-direction: row;
    gap: 24px;
    width: 100%;
    box-sizing: border-box;
    padding: 12px 18px;
    background: linear-gradient(90deg, rgba(15, 20, 28, 0.92), rgba(10, 12, 18, 0.94));
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: opacity 1s ease;
}

#stats-header.hidden {
    opacity: 0;
    pointer-events: none;
}

.stats-row {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 24px;
    width: 100%;
    box-sizing: border-box;
    padding: 12px 18px;
    background: linear-gradient(90deg, rgba(15, 20, 28, 0.92), rgba(10, 12, 18, 0.94));
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 100px;
}

.stat-label {
    display: block;
    font-size: 10px;
    letter-spacing: 2.2px;
    color: rgba(181, 197, 210, 0.72);
}

.stat-value {
    position: relative;
    z-index: 1;
    font-size: 24px;
    line-height: 1.05;
    font-weight: 700;
    color: #ffffff;
}

.stat-unit {
    font-size: 12px;
    color: rgba(212, 220, 228, 0.72);
    font-weight: 500;
}

.panel-shell-header {
    display: grid;
    gap: 6px;
    margin-bottom: 6px;
}

.shell-kicker {
    font-size: 10px;
    letter-spacing: 2.4px;
    color: rgba(155, 215, 255, 0.72);
}

.shell-title {
    margin: 0;
    font-size: 22px;
    letter-spacing: 1px;
    color: #f7fbff;
}

.shell-subtitle {
    margin: 0;
    color: rgba(220, 230, 240, 0.76);
    font-size: 12px;
    line-height: 1.5;
}

.status-stack {
    display: grid;
    gap: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    margin-bottom: 6px;
}

.status-row {
    padding: 14px 0 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.status-row:last-child {
    border-bottom: none;
}

.status-row-prominent {
    padding-top: 16px;
}

.metric-label {
    display: block;
    font-size: 10px;
    letter-spacing: 2.2px;
    color: rgba(181, 197, 210, 0.78);
    margin-bottom: 8px;
}

.metric-value {
    position: relative;
    z-index: 1;
    font-size: 27px;
    line-height: 1.05;
    font-weight: 700;
    color: #ffffff;
}

.metric-value-small {
    font-size: 18px;
}

.metric-unit {
    font-size: 12px;
    color: rgba(212, 220, 228, 0.72);
    font-weight: 500;
}

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 10, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-container {
    text-align: center;
}

.loading-text {
    color: #ffffff;
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.loading-message {
    color: rgba(255, 255, 255, 0.72);
    font-size: 12px;
    letter-spacing: 0.3px;
    margin-bottom: 14px;
}

.loading-detail {
    color: rgba(155, 215, 255, 0.88);
    font-size: 13px;
    letter-spacing: 0.2px;
    margin-bottom: 16px;
    line-height: 1.5;
}

.progress-bar-container {
    width: 300px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 12px;
}

#progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #00d2ff, #9bd7ff);
    width: 0%;
    transition: width 0.2s ease;
    border-radius: 2px;
    box-shadow: 0 0 8px rgba(0, 210, 255, 0.6);
}

.loading-percent {
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
    letter-spacing: 0.3px;
}

#help-button {
    position: fixed;
    top: 18px;
    right: 18px;
    z-index: 30;
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 999px;
    background: rgba(15, 15, 15, 0.72);
    color: #ffffff;
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
}

#theme-toggle-button {
    position: fixed;
    top: 66px;
    right: 18px;
    z-index: 30;
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 999px;
    background: rgba(15, 15, 15, 0.72);
    color: #f4e36b;
    font-size: 19px;
    line-height: 1;
    cursor: pointer;
}

#theme-toggle-button.active {
    color: #101010;
    background: rgba(255, 255, 255, 0.85);
}

#follow-toggle-button {
    position: fixed;
    top: 114px;
    right: 18px;
    z-index: 30;
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 10px;
    background: rgba(15, 15, 15, 0.64);
    color: #ffffff;
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

#minimap {
    position: fixed;
    top: 18px;
    right: 70px;
    z-index: 40;
    width: 180px;
    height: 180px;
    border-radius: 8px;
    background: rgba(8, 12, 18, 0.62);
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: 0 6px 18px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.02);
    padding: 6px;
    pointer-events: none;
}

body.theme-light #minimap {
    background: rgba(255,255,255,0.9);
    border-color: rgba(15,23,42,0.06);
}

#follow-toggle-button.active {
    background: linear-gradient(180deg, rgba(155,215,255,0.16), rgba(155,215,255,0.06));
    color: #ffffff;
    border-color: rgba(155,215,255,0.24);
}

body.theme-light #follow-toggle-button {
    background: rgba(255,255,255,0.9);
    color: #0f172a;
    border-color: rgba(15,23,42,0.08);
}

body.theme-light #follow-toggle-button.active {
    background: rgba(29,78,216,0.12);
    color: #071433;
}

#help-button:hover {
    transform: translateY(-1px);
}

#help-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.38);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 40;
}

#help-backdrop.visible {
    opacity: 1;
    pointer-events: auto;
}

#help-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.98);
    width: min(92vw, 420px);
    z-index: 50;
    background: rgba(16, 16, 18, 0.94);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 18px;
    padding: 20px 20px 18px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

#help-modal.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, -50%) scale(1);
}

.help-modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 12px;
}

.help-kicker {
    font-size: 10px;
    letter-spacing: 2px;
    color: #aaaaaa;
    margin-bottom: 6px;
}

#help-modal h2 {
    margin: 0;
    font-size: 22px;
}

#help-close-button {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    font-size: 22px;
    cursor: pointer;
    flex: 0 0 auto;
}

#help-summary {
    margin: 0 0 14px;
    color: #d8d8d8;
    line-height: 1.6;
    font-size: 13px;
}

.help-action-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 10px;
}

.help-action-list li {
    display: grid;
    gap: 4px;
    padding: 12px 14px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.06);
}

.help-action-list strong {
    font-size: 12px;
    letter-spacing: 1px;
}

.help-action-list span {
    color: #d1d1d1;
    font-size: 13px;
    line-height: 1.5;
}

.keycap {
    display: inline-block;
    padding: 1px 7px;
    margin: 0 2px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-bottom-width: 2px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    font-family: 'Courier New', monospace;
    font-size: 12px;
}

/* ==========================================
   ミニマル・プレイヤーUI
========================================== */
#playback-controls {
    position: fixed;
    bottom: 18px;
    left: 18px;
    right: var(--side-panel-safe-space);
    z-index: 25;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: opacity 1s ease;
}

#playback-controls.hidden {
    opacity: 0;
    pointer-events: none;
}

#ui-container {
    position: static;
    width: 100%;
    transition: opacity 1s ease;
}

#ui-container.hidden {
    opacity: 0;
    pointer-events: none;
}

.player-wrapper {
    display: flex;
    align-items: center;
    gap: 15px;
    width: 100%;
    box-sizing: border-box;
    background: linear-gradient(90deg, rgba(15, 20, 28, 0.92), rgba(10, 12, 18, 0.94));
    padding: 12px 18px;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    font-family: 'Helvetica Neue', Arial, sans-serif;
}

.playback-speed {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-left: 8px;
    color: #d8d8d8;
}

.playback-speed label {
    font-size: 11px;
    color: #bfcfe0;
}

#playback-speed-slider {
    width: 120px;
}

.playback-speed-panel {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px 10px;
    margin-left: 0;
    color: #d8d8d8;
}

.playback-speed-panel label {
    grid-column: 1 / -1;
}

.playback-speed-panel #playback-speed-slider {
    width: 100%;
}

.playback-speed-panel #playback-speed-value {
    min-width: 3.8em;
    text-align: right;
    justify-self: end;
}

.camera-mode-row {
    display: flex;
    gap: 8px;
}

.camera-mode-btn {
    padding: 6px 10px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.06);
    background: rgba(255,255,255,0.02);
    color: #dcdcdc;
    cursor: pointer;
}

.camera-mode-btn.active {
    background: linear-gradient(90deg, rgba(155,215,255,0.12), rgba(155,215,255,0.06));
    border-color: rgba(155,215,255,0.18);
    color: #ffffff;
}

body.theme-light .camera-mode-btn {
    color: #0f172a;
    background: rgba(15,23,42,0.04);
    border-color: rgba(15,23,42,0.06);
}

body.theme-light .camera-mode-btn.active {
    background: rgba(29,78,216,0.12);
    color: #071433;
}

#play-pause-btn {
    background: none;
    border: none;
    font-size: 14px;
    color: #f5f5f5;
    cursor: pointer;
    padding: 5px;
    width: 30px;
    text-align: center;
    outline: none;
}

#seek-bar {
    -webkit-appearance: none;
    appearance: none;
    flex-grow: 1;
    height: 2px;
    background: rgba(255, 255, 255, 0.10);
    outline: none;
    cursor: pointer;
}

#seek-bar::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(155, 215, 255, 0.9);
    cursor: pointer;
    transition: transform 0.1s;
}
#seek-bar::-webkit-slider-thumb:hover {
    transform: scale(1.5);
}

#time-display {
    font-size: 11px;
    color: #cfcfcf;
    letter-spacing: 1px;
    min-width: 100px;
    text-align: right;
    font-weight: 500;
}

/* ==========================================
   サイド・コントロールパネル
========================================== */
#side-panel {
    position: fixed;
    bottom: 18px;
    right: 18px;
    top: auto;
    width: var(--side-panel-width);
    max-height: calc(100vh - 200px);
    overflow-y: auto;
    z-index: 24;
    display: grid;
    gap: 12px;
    background: linear-gradient(180deg, rgba(8, 12, 18, 0.72), rgba(6, 8, 12, 0.95));
    border: 1px solid rgba(155, 215, 255, 0.12);
    border-radius: 12px;
    padding: 16px;
    color: #ffffff;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-size: 12px;
    transition: opacity 1s ease;
}

#side-panel.hidden {
    opacity: 0;
    pointer-events: none;
}

.panel-section {
    margin-bottom: 0;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.panel-section:last-child {
    border-bottom: none;
}

#side-panel h3 {
    margin: 0 0 14px 0;
    font-size: 10px;
    color: #aaaaaa;
    letter-spacing: 2px;
}

#view-mode {
    width: 100%;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 6px;
    border-radius: 6px;
    outline: none;
    cursor: pointer;
}

.toggle-row {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    cursor: pointer;
    font-weight: 500;
}

.toggle-row input {
    margin-right: 12px;
    cursor: pointer;
}

.debug-control {
    display: grid;
    gap: 8px;
    padding-top: 2px;
    min-width: 0;
}

.debug-control-label {
    font-size: 11px;
    color: #d7d7d7;
    display: flex;
    justify-content: space-between;
    gap: 12px;
}

#marker-size-slider {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
    outline: none;
}

#marker-size-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #9bd7ff;
    border: 2px solid rgba(255, 255, 255, 0.85);
    cursor: pointer;
}

#marker-size-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #9bd7ff;
    border: 2px solid rgba(255, 255, 255, 0.85);
    cursor: pointer;
}

.color-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 8px;
}

body.theme-light {
    background-color: #eef3f8;
}

body.theme-light #help-button,
body.theme-light #theme-toggle-button {
    background: rgba(255, 255, 255, 0.88);
    color: #0f172a;
    border-color: rgba(15, 23, 42, 0.14);
}

body.theme-light #help-modal {
    background: rgba(255, 255, 255, 0.94);
    color: #0f172a;
    border-color: rgba(15, 23, 42, 0.12);
}

body.theme-light #help-summary,
body.theme-light .help-action-list span {
    color: #334155;
}

body.theme-light .help-action-list li {
    background: rgba(15, 23, 42, 0.04);
}

body.theme-light .keycap {
    background: rgba(15, 23, 42, 0.06);
    color: #0f172a;
    border-color: rgba(15, 23, 42, 0.16);
}

body.theme-light #loading-overlay {
    background: rgba(245, 248, 252, 0.96);
}

body.theme-light .loading-text,
body.theme-light .metric-value,
body.theme-light #time-display,
body.theme-light #side-panel,
body.theme-light .player-wrapper,
body.theme-light #view-mode,
body.theme-light #help-close-button {
    color: #0f172a;
}

body.theme-light .loading-message,
body.theme-light .loading-percent,
body.theme-light .loading-detail,
body.theme-light .shell-subtitle,
body.theme-light .metric-unit,
body.theme-light .metric-label,
body.theme-light .debug-control-label,
body.theme-light #side-panel h3,
body.theme-light .help-kicker {
    color: #475569;
}

body.theme-light #progress-bar {
    background: linear-gradient(90deg, #1d4ed8, #38bdf8);
    box-shadow: 0 0 6px rgba(29, 78, 216, 0.28);
}

body.theme-light #dashboard-shell {
    color: #0f172a;
}

body.theme-light .shell-title {
    color: #0f172a;
}

body.theme-light .panel-shell {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(238, 243, 248, 0.96));
    border-left-color: rgba(15, 23, 42, 0.12);
}

body.theme-light #side-panel {
    background: linear-gradient(180deg, rgba(250, 252, 255, 0.9), rgba(238, 243, 248, 0.96));
    border-left-color: rgba(15, 23, 42, 0.12);
}

body.theme-light .status-stack,
body.theme-light .panel-section {
    border-color: rgba(15, 23, 42, 0.08);
}

body.theme-light .status-row {
    border-bottom-color: rgba(15, 23, 42, 0.08);
}

body.theme-light .panel-shell-header,
body.theme-light .metric-card::after {
    color: #0f172a;
}

body.theme-light .player-wrapper {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.94), rgba(241, 245, 249, 0.96));
    border-color: rgba(15, 23, 42, 0.08);
}

body.theme-light #seek-bar {
    background: rgba(15, 23, 42, 0.15);
}

body.theme-light #seek-bar::-webkit-slider-thumb {
    background: rgba(15, 23, 42, 0.8);
}

body.theme-light #stats-header {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.94), rgba(241, 245, 249, 0.96)) !important;
    border-color: rgba(15, 23, 42, 0.08) !important;
}

body.theme-light .stats-row {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.94), rgba(241, 245, 249, 0.96)) !important;
    border-color: rgba(15, 23, 42, 0.08) !important;
}

body.theme-light .stat-label {
    color: #64748b !important;
}

body.theme-light .stat-value {
    color: #0f172a !important;
}

body.theme-light .stat-unit {
    color: #475569 !important;
}

body.theme-light #playback-controls {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.9), rgba(241, 245, 249, 0.88)) !important;
    border-color: rgba(15, 23, 42, 0.08) !important;
}

body.theme-light #marker-size-slider,
body.theme-light #view-mode {
    background: rgba(15, 23, 42, 0.08);
    color: #0f172a;
    border-color: rgba(15, 23, 42, 0.12);
}

body.theme-light #marker-size-slider::-webkit-slider-thumb {
    background: #0f172a;
    border-color: rgba(255, 255, 255, 0.9);
}

body.theme-light #marker-size-slider::-moz-range-thumb {
    background: #0f172a;
    border-color: rgba(255, 255, 255, 0.9);
}

body.theme-light .color-dot {
    box-shadow: none !important;
}

@media (max-width: 1100px) {
    #dashboard-shell {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
    }

    .panel-shell,
    #side-panel {
        grid-column: 1;
    }

    .panel-shell {
        border-left: none;
        border-top: 1px solid rgba(155, 215, 255, 0.15);
    }

    #side-panel {
        border-left: none;
        border-top: 1px solid rgba(155, 215, 255, 0.15);
        margin-top: 0;
    }

    .status-stack {
        margin-bottom: 10px;
    }
}

@media (max-width: 760px) {
    #dashboard-shell {
        padding: 12px;
        gap: 12px;
    }

    .status-row,
    .panel-section {
        padding: 12px 0;
    }

    .shell-title {
        font-size: 20px;
    }

    .player-wrapper {
        flex-wrap: wrap;
    }

    #playback-controls {
        right: 18px;
    }

    #side-panel {
        width: min(calc(100vw - 36px), var(--side-panel-width));
        bottom: 176px;
        max-height: calc(100vh - 360px);
    }

    #time-display {
        min-width: 0;
        width: 100%;
        text-align: left;
    }
}