:root {
    --map-loading-overlay-glow: rgba(255, 255, 255, 0.18);
    --map-loading-overlay-color: rgba(15, 23, 42, 0.22);
    --map-loading-card-width: min(220px, calc(100vw - 48px));
    --map-loading-card-padding: 18px 22px;
    --map-loading-card-gap: 11px;
    --map-loading-card-radius: 24px;
    --map-loading-card-background: rgba(255, 255, 255, 0.88);
    --map-loading-card-border: rgba(255, 255, 255, 0.72);
    --map-loading-card-shadow: 0 22px 70px rgba(15, 23, 42, 0.26);
    --map-loading-card-text: #1f2937;
    --map-loading-font-family: "Hiragino Sans", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --map-loading-font-size: 12px;
    --map-loading-line-height: 1.3;
    --map-loading-font-weight: 700;
    --map-loading-letter-spacing: 0.08em;
    --map-loading-spinner-size: 38px;
    --map-loading-spinner-start: #667eea;
    --map-loading-spinner-end: #22c55e;
    --map-loading-spinner-shadow: rgba(102, 126, 234, 0.28);
    --map-loading-spinner-track: rgba(148, 163, 184, 0.2);
}

.map-page-loading,
.map-initial-loading,
.pm-admin-loading {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    background:
        radial-gradient(circle at 50% 50%, var(--map-loading-overlay-glow), transparent 34%),
        var(--map-loading-overlay-color);
    transition: opacity 0.18s ease, visibility 0.18s ease;
}

.map-page-loading.is-visible,
.map-initial-loading.is-visible,
.pm-admin-loading.is-visible {
    opacity: 1;
    visibility: visible;
}

.map-page-loading.is-visible,
.pm-admin-loading.is-visible {
    pointer-events: auto;
}

.map-page-loading-card,
.map-initial-loading-card,
.pm-admin-loading-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--map-loading-card-gap);
    width: var(--map-loading-card-width);
    max-width: 100%;
    padding: var(--map-loading-card-padding);
    color: var(--map-loading-card-text);
    text-align: center;
    background: var(--map-loading-card-background);
    border: 1px solid var(--map-loading-card-border);
    border-radius: var(--map-loading-card-radius);
    box-shadow: var(--map-loading-card-shadow);
    backdrop-filter: blur(18px) saturate(1.2);
    box-sizing: border-box;
}

.map-page-loading-spinner,
.map-initial-loading-spinner,
.pm-admin-loading-spinner,
.activity-modal-spinner {
    width: var(--map-loading-spinner-size);
    height: var(--map-loading-spinner-size);
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-page-loading-title,
.map-initial-loading-text,
.pm-admin-loading-title,
.activity-modal-loading-text {
    margin: 0;
    color: var(--map-loading-card-text);
    font-family: var(--map-loading-font-family);
    font-size: var(--map-loading-font-size);
    line-height: var(--map-loading-line-height);
    font-weight: var(--map-loading-font-weight);
    letter-spacing: var(--map-loading-letter-spacing);
}

.map-page-loading-copy,
.pm-admin-loading-copy {
    display: none;
}

.map-loading-ring {
    width: calc(var(--map-loading-spinner-size) - 8px);
    height: calc(var(--map-loading-spinner-size) - 8px);
    border-radius: 50%;
    background:
        conic-gradient(
            from 180deg,
            var(--map-loading-spinner-track) 0deg 120deg,
            var(--map-loading-spinner-start) 175deg,
            var(--map-loading-spinner-end) 300deg,
            var(--map-loading-spinner-track) 360deg
        );
    -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px));
    mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px));
    filter: drop-shadow(0 8px 16px var(--map-loading-spinner-shadow));
    animation: mapLoadingOrbit 0.82s linear infinite;
}

.map-loading-piano-keys {
    position: relative;
    display: block;
    width: calc(var(--map-loading-spinner-size) + 10px);
    height: calc(var(--map-loading-spinner-size) - 2px);
    filter: drop-shadow(0 8px 16px var(--map-loading-spinner-shadow));
}

.map-loading-piano-white-keys {
    position: absolute;
    inset: 8px 0 0;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1px;
    padding: 0 1px 1px;
    border-radius: 7px;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.16) 0%, rgba(15, 23, 42, 0.08) 100%);
    overflow: hidden;
}

.map-loading-piano-white-key {
    min-width: 0;
    border-radius: 0 0 6px 6px;
    background: linear-gradient(180deg, #ffffff 0%, #eef3f8 72%, #dbe3ec 100%);
    box-shadow:
        inset 0 -2px 0 rgba(15, 23, 42, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.96);
    transform-origin: center top;
    animation: mapLoadingPianoWhiteKey 1.05s ease-in-out infinite;
}

.map-loading-piano-white-key.is-key-1 { animation-delay: 0s; }
.map-loading-piano-white-key.is-key-2 { animation-delay: 0.06s; }
.map-loading-piano-white-key.is-key-3 { animation-delay: 0.12s; }
.map-loading-piano-white-key.is-key-4 { animation-delay: 0.18s; }
.map-loading-piano-white-key.is-key-5 { animation-delay: 0.24s; }
.map-loading-piano-white-key.is-key-6 { animation-delay: 0.30s; }

.map-loading-piano-black-keys {
    position: absolute;
    inset: 0 4px auto;
    height: 20px;
    pointer-events: none;
}

.map-loading-piano-black-key {
    position: absolute;
    top: 0;
    width: 5px;
    height: 16px;
    border-radius: 0 0 4px 4px;
    background: linear-gradient(180deg, #1f2937 0%, #0f172a 100%);
    box-shadow:
        inset 0 -1px 0 rgba(255, 255, 255, 0.08),
        0 1px 2px rgba(15, 23, 42, 0.18);
    transform-origin: center top;
    animation: mapLoadingPianoBlackKey 1.05s ease-in-out infinite;
}

.map-loading-piano-black-key.is-csharp { left: calc((100% / 6) - 2.5px); }
.map-loading-piano-black-key.is-dsharp { left: calc((100% / 6) * 2 - 2.5px); }
.map-loading-piano-black-key.is-fsharp { left: calc((100% / 6) * 4 - 2.5px); }
.map-loading-piano-black-key.is-gsharp { left: calc((100% / 6) * 5 - 2.5px); }

.map-loading-piano-black-key.is-key-1 { animation-delay: 0.03s; }
.map-loading-piano-black-key.is-key-2 { animation-delay: 0.09s; }
.map-loading-piano-black-key.is-key-4 { animation-delay: 0.21s; }
.map-loading-piano-black-key.is-key-5 { animation-delay: 0.27s; }

.map-page-loading-spinner[data-loading-style="piano_keys"],
.map-initial-loading-spinner[data-loading-style="piano_keys"],
.pm-admin-loading-spinner[data-loading-style="piano_keys"],
.activity-modal-spinner[data-loading-style="piano_keys"] {
    width: calc(var(--map-loading-spinner-size) + 10px);
}

@keyframes mapLoadingOrbit {
    to {
        transform: rotate(360deg);
    }
}

@keyframes mapLoadingPianoWhiteKey {
    0%, 100% {
        transform: translateY(0) scaleY(1);
        filter: brightness(1);
    }
    40% {
        transform: translateY(2px) scaleY(0.95);
        filter: brightness(0.98);
    }
    55% {
        transform: translateY(4px) scaleY(0.92);
        filter: brightness(0.94);
    }
}

@keyframes mapLoadingPianoBlackKey {
    0%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(1px);
    }
    55% {
        transform: translateY(3px);
    }
}