/* --- Pano Viewer Hybrid Kernel Styles --- */

/* --- Viewer Toggle & Controls --- */
.viewer-controls {
    position: absolute;
    right: 14px;
    top: 14px;
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
    pointer-events: none;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 260ms ease, transform 260ms ease;
}

#viewer-container.viewer-ui-visible .viewer-controls {
    opacity: 1;
    transform: translateY(0);
}

#viewer-container.viewer-is-active.viewer-loading-active #viewer-content {
    filter: blur(10px) saturate(0.9);
    transform: scale(1.015);
    opacity: 0.28;
}

#viewer-container.viewer-is-active.viewer-switching #viewer-content {
    opacity: 0.18;
    transform: scale(0.988);
}

#viewer-content {
    transition: opacity 280ms ease, transform 360ms ease, filter 320ms ease;
}

.viewer-hud {
    pointer-events: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.28);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.16);
    box-shadow: 0 14px 36px rgba(15, 23, 42, 0.24);
}

.viewer-hud-btn {
    width: 36px;
    height: 36px;
    border: 0;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.08);
    transition: transform 180ms ease, background-color 180ms ease, color 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
    opacity: 0.88;
}

.viewer-hud-btn:hover,
.viewer-hud-btn:focus-visible {
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
    opacity: 1;
    transform: translateY(-1px) scale(1.02);
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.2);
}

.viewer-hud-btn:active {
    transform: scale(0.96);
}

.viewer-hud-btn svg {
    width: 17px;
    height: 17px;
}

.viewer-toggle {
    pointer-events: auto;
    background: rgba(15, 23, 42, 0.34);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 99px;
    padding: 4px;
    align-items: center;
    height: 40px;
    box-shadow: 0 14px 36px rgba(15, 23, 42, 0.24);
}
.viewer-toggle:not(.hidden) {
    display: flex;
}
.viewer-toggle-btn {
    height: 30px;
    padding: 0 12px;
    border-radius: 99px;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    transition: transform 180ms ease, background-color 180ms ease, color 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
    color: rgba(255, 255, 255, 0.6);
    display: flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
    border: none;
    cursor: pointer;
    opacity: 0.9;
}
.viewer-toggle-btn.active {
    background: rgba(255, 255, 255, 0.96);
    color: #0f172a;
    box-shadow: 0 8px 16px rgba(255, 255, 255, 0.18);
}
.viewer-toggle-btn:not(.active):hover {
    color: white;
    background: rgba(255, 255, 255, 0.12);
    opacity: 1;
}

.viewer-toggle-btn:active {
    transform: scale(0.97);
}

.viewer-loading {
    position: absolute;
    inset: 0;
    z-index: 45;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(180deg, rgba(12, 18, 28, 0.16) 0%, rgba(12, 18, 28, 0.42) 100%);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 260ms ease;
}

.viewer-loading.is-visible {
    opacity: 1;
}

.viewer-loading-card {
    min-width: min(320px, calc(100vw - 48px));
    max-width: 360px;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.9);
    color: #1c1917;
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.18);
}

.viewer-loading-spinner {
    width: 22px;
    height: 22px;
    border-radius: 999px;
    border: 2px solid rgba(16, 185, 129, 0.18);
    border-top-color: #10b981;
    animation: viewer-spin 0.9s linear infinite;
    flex: 0 0 auto;
}

.viewer-loading-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.viewer-loading-title {
    font-size: 12px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #0f172a;
}

.viewer-loading-copy {
    font-size: 13px;
    color: #57534e;
}

@keyframes viewer-spin {
    to { transform: rotate(360deg); }
}

#viewer-container.viewer-is-active #viewer-content,
#viewer-container.viewer-is-active #viewer-content * {
    cursor: grab !important;
}

#viewer-container.viewer-is-active.viewer-is-dragging #viewer-content,
#viewer-container.viewer-is-active.viewer-is-dragging #viewer-content * {
    cursor: grabbing !important;
}

#viewer-container .viewer-controls,
#viewer-container .viewer-controls * {
    cursor: default !important;
}

/* --- Error States --- */
.viewer-error-state {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at top, rgba(255, 255, 255, 0.92), rgba(245, 245, 244, 0.96)),
        linear-gradient(180deg, rgba(255, 255, 255, 0.75), rgba(245, 245, 244, 0.96));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    text-align: center;
    z-index: 40;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.viewer-error-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(180deg, #fee2e2 0%, #fecaca 100%);
    color: #ef4444;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    box-shadow: 0 14px 30px rgba(239, 68, 68, 0.14);
}