* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #000;
    color: #fff;
    overflow: hidden;
}

#space-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
    z-index: 0;
    touch-action: none; /* pinch/drag drive OrbitControls, not browser zoom/scroll */
}

#travel-streaks {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}

#stellar-comparison {
    position: absolute;
    inset: 0;
    z-index: 8;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
}

.stellar-hologram {
    --core-size: 12px;
    --marker-size: 48px;
    position: absolute;
    width: var(--marker-size);
    height: var(--marker-size);
    transform: translate(-50%, -50%);
    color: #63d9ff;
    filter: drop-shadow(0 0 7px rgba(72, 198, 255, 0.72));
    will-change: left, top;
}

.hologram-core,
.hologram-reticle,
.hologram-beam {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.hologram-core {
    width: var(--core-size);
    height: var(--core-size);
    min-width: 1px;
    min-height: 1px;
    border: 1px solid rgba(179, 239, 255, 0.9);
    border-radius: 50%;
    overflow: hidden;
    background:
        repeating-linear-gradient(
            to bottom,
            rgba(215, 249, 255, 0.72) 0,
            rgba(215, 249, 255, 0.72) 1px,
            rgba(29, 155, 224, 0.22) 2px,
            rgba(29, 155, 224, 0.05) 4px
        ),
        radial-gradient(circle at 36% 32%, rgba(235, 253, 255, 0.9), rgba(54, 186, 239, 0.28) 48%, rgba(0, 82, 160, 0.08) 72%);
    box-shadow:
        0 0 5px rgba(158, 235, 255, 0.92),
        0 0 18px rgba(48, 178, 255, 0.58),
        inset 0 0 12px rgba(202, 246, 255, 0.5);
    animation: hologram-flicker 2.8s steps(1, end) infinite;
}

.hologram-reticle {
    width: 100%;
    height: 100%;
    border: 1px solid rgba(84, 202, 255, 0.5);
    border-radius: 50%;
    box-shadow:
        0 0 9px rgba(60, 187, 255, 0.28),
        inset 0 0 9px rgba(60, 187, 255, 0.18);
    animation: hologram-pulse 2.2s ease-in-out infinite;
}

.hologram-reticle::before,
.hologram-reticle::after {
    content: '';
    position: absolute;
    background: rgba(105, 218, 255, 0.55);
}

.hologram-reticle::before {
    left: 50%;
    top: -6px;
    width: 1px;
    height: calc(100% + 12px);
}

.hologram-reticle::after {
    left: -6px;
    top: 50%;
    width: calc(100% + 12px);
    height: 1px;
}

.hologram-beam {
    width: 72%;
    height: 145%;
    opacity: 0.24;
    background: linear-gradient(
        to bottom,
        transparent,
        rgba(68, 194, 255, 0.18) 18%,
        rgba(129, 226, 255, 0.48) 50%,
        rgba(68, 194, 255, 0.18) 82%,
        transparent
    );
    clip-path: polygon(28% 0, 72% 0, 100% 50%, 72% 100%, 28% 100%, 0 50%);
}

.hologram-label {
    position: absolute;
    left: 50%;
    top: calc(100% + 9px);
    min-width: 112px;
    transform: translateX(-50%);
    padding: 4px 8px 5px;
    border: 1px solid rgba(70, 186, 255, 0.36);
    border-radius: 4px;
    background: rgba(0, 18, 38, 0.58);
    box-shadow: 0 0 12px rgba(31, 156, 255, 0.16);
    color: #8de3ff;
    font-size: 10px;
    line-height: 1.15;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    white-space: nowrap;
}

.hologram-name {
    display: block;
    color: #d5f7ff;
    font-weight: 700;
}

.hologram-ratio {
    display: block;
    margin-top: 3px;
    color: #52c7ff;
    font-size: 9px;
    letter-spacing: 0.08em;
}

@keyframes hologram-pulse {
    0%, 100% { opacity: 0.48; transform: translate(-50%, -50%) scale(0.94); }
    50% { opacity: 0.9; transform: translate(-50%, -50%) scale(1.04); }
}

@keyframes hologram-flicker {
    0%, 91%, 94%, 100% { opacity: 0.82; }
    92% { opacity: 0.5; }
    93% { opacity: 0.95; }
}

@media (prefers-reduced-motion: reduce) {
    #travel-streaks {
        display: none;
    }

    .hologram-core,
    .hologram-reticle {
        animation: none;
    }
}

/* Mobile-only chrome (bottom nav, sheet headers) — hidden on desktop */
.mobile-only {
    display: none;
}

#mobile-nav {
    display: none;
}

#compare-arrows {
    display: none; /* mobile size-compare mode only; desktop uses the scroll wheel */
}

#ui-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

#sidebar {
    position: absolute;
    top: 0;
    left: 0;
    width: 280px;
    height: 100%;
    background: rgba(0, 5, 15, 0.9);
    backdrop-filter: blur(15px);
    border-right: 1px solid rgba(74, 158, 255, 0.3);
    pointer-events: auto;
    display: flex;
    flex-direction: column;
    z-index: 20;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

#sidebar.collapsed {
    transform: translateX(-280px);
}

#sidebar-toggle {
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 80px;
    background: rgba(0, 5, 15, 0.95);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(74, 158, 255, 0.3);
    border-left: none;
    border-radius: 0 8px 8px 0;
    color: #88aaff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 30;
    transition: background 0.3s, color 0.3s, border-color 0.3s, box-shadow 0.3s;
    outline: none;
    box-shadow: 4px 0 15px rgba(0, 0, 0, 0.3);
}

#sidebar-toggle:hover {
    background: rgba(74, 158, 255, 0.25);
    color: #fff;
    border-color: rgba(74, 158, 255, 0.6);
    box-shadow: 0 0 15px rgba(74, 158, 255, 0.4);
}

#sidebar-toggle::after {
    content: '◀';
    font-size: 0.7rem;
    transition: transform 0.3s;
}

#sidebar.collapsed #sidebar-toggle::after {
    content: '▶';
}

.sort-btn {
    width: 100%;
    padding: 8px 12px;
    background: rgba(74, 158, 255, 0.15);
    border: 1px solid rgba(74, 158, 255, 0.3);
    border-radius: 6px;
    color: #fff;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 10px;
}

.sort-btn:hover {
    background: rgba(74, 158, 255, 0.25);
    border-color: rgba(74, 158, 255, 0.5);
}

.sort-label {
    color: #88aaff;
}

#sort-mode {
    color: #4a9eff;
    font-weight: 600;
}

/* Old home button style removed */

#object-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

#object-list::-webkit-scrollbar {
    width: 6px;
}

#object-list::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.3);
}

#object-list::-webkit-scrollbar-thumb {
    background: rgba(74, 158, 255, 0.4);
    border-radius: 3px;
}

.object-category {
    margin-bottom: 15px;
}

.category-header {
    font-size: 0.75rem;
    color: #88aaff;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 8px 10px;
    border-bottom: 1px solid rgba(74, 158, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.2s;
    gap: 8px;
}

.category-header:hover {
    color: #4a9eff;
    background: rgba(74, 158, 255, 0.1);
}

.category-title {
    flex: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
}

.category-title::after {
    content: '▼';
    font-size: 0.6rem;
    transition: transform 0.3s;
}

.category-header.collapsed .category-title::after {
    transform: rotate(-90deg);
}

.category-sort-btn {
    background: rgba(74, 158, 255, 0.15);
    border: 1px solid rgba(74, 158, 255, 0.25);
    border-radius: 4px;
    color: #4a9eff;
    font-size: 0.65rem;
    cursor: pointer;
    padding: 3px 8px;
    transition: all 0.2s;
    text-transform: none;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.category-sort-btn:hover {
    background: rgba(74, 158, 255, 0.3);
    border-color: rgba(74, 158, 255, 0.5);
}

.category-items {
    padding: 5px 0;
}

.category-items.collapsed {
    display: none;
}

.object-item {
    padding: 8px 12px;
    margin: 3px 5px;
    background: rgba(0, 20, 40, 0.6);
    border: 1px solid rgba(74, 158, 255, 0.15);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.85rem;
    color: #aaccff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.object-item:hover {
    background: rgba(74, 158, 255, 0.2);
    border-color: rgba(74, 158, 255, 0.4);
    color: #fff;
}

.object-item.active {
    background: rgba(74, 158, 255, 0.3);
    border-color: rgba(74, 158, 255, 0.8);
    color: #fff;
    box-shadow: 0 0 10px rgba(74, 158, 255, 0.2);
}

.object-item::before {
    content: '•';
    font-size: 1.5rem;
    line-height: 0;
}

.object-info {
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 1;
}

.object-distance {
    font-size: 0.7rem;
    color: #88aaff;
    opacity: 0.8;
}

.size-indicator {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    background: linear-gradient(90deg, #4a9eff, #9d4aff);
    transition: width 0.3s ease;
    opacity: 0.6;
}

.size-tag {
    font-size: 0.7rem;
    color: #4a9eff;
    font-weight: 600;
}

.object-item.star::before { color: #FFDD44; }
.object-item.planet::before { color: #4a9eff; }
.object-item.exoplanet::before { color: #6CC6FF; }
.object-item.moon::before { color: #AAAAAA; }
.object-item.blackhole::before { content: '◉'; color: #FF4400; }
.object-item.galaxy::before { content: '◯'; color: #FFEEDD; }
.object-item.nebula::before { content: '○'; color: #FFAA88; }
.object-item.cluster::before { content: '✦'; color: #AAAADD; }

#header {
    position: absolute;
    top: 20px;
    left: 300px; /* Moved right to clear sidebar */
    pointer-events: auto;
    display: flex;
    flex-direction: column;
    gap: 5px;
    z-index: 25; /* higher than sidebar if needed, but sidebar is left:0 */
    transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

#sidebar.collapsed ~ #header {
    left: 44px;
}

.header-row {
    display: flex;
    align-items: center;
    gap: 30px;
}

.header-buttons {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(0, 20, 40, 0.6);
    border: 1px solid rgba(74, 158, 255, 0.4);
    border-radius: 20px;
    color: #4a9eff;
    font-size: 0.9rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

@keyframes pulseBrightBorder {
    0% {
        border-color: rgba(74, 158, 255, 0.4);
        box-shadow: 0 0 0 rgba(74, 158, 255, 0);
    }
    50% {
        border-color: rgba(74, 158, 255, 1);
        box-shadow: 0 0 15px rgba(74, 158, 255, 0.8), inset 0 0 10px rgba(74, 158, 255, 0.5);
    }
    100% {
        border-color: rgba(74, 158, 255, 0.4);
        box-shadow: 0 0 0 rgba(74, 158, 255, 0);
    }
}

.pulse-border {
    animation: pulseBrightBorder 1.5s ease-in-out infinite;
}

.header-btn:hover {
    background: rgba(74, 158, 255, 0.2);
    border-color: rgba(74, 158, 255, 0.8);
    box-shadow: 0 0 15px rgba(74, 158, 255, 0.3);
    color: #fff;
    transform: translateY(-2px);
}

.header-btn .icon {
    font-size: 1.1rem;
}

.header-btn .text {
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-size: 0.8rem;
}

#header h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 4px;
    text-transform: uppercase;
    background: linear-gradient(135deg, #4a9eff 0%, #9d4aff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(74, 158, 255, 0.5);
    margin: 0;
}

#zoom-level {
    font-size: 0.9rem;
    color: #88aaff;
    margin-top: 5px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

#controls-info {
    position: absolute;
    bottom: 20px;
    left: 300px;
    pointer-events: auto;
    background: rgba(0, 10, 30, 0.7);
    backdrop-filter: blur(10px);
    padding: 15px 20px;
    border-radius: 10px;
    border: 1px solid rgba(74, 158, 255, 0.3);
    transform-origin: bottom left;
    transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 0.25s ease,
                transform 0.25s ease,
                visibility 0.25s ease;
}

#sidebar.collapsed ~ #controls-info {
    left: 44px;
}

#controls-info.minimized {
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px) scale(0.96);
    pointer-events: none;
}

#controls-info-button {
    position: absolute;
    bottom: 20px;
    left: 300px;
    width: 44px;
    height: 44px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
    cursor: pointer;
    color: #d9eaff;
    font-size: 1.35rem;
    line-height: 1;
    background: rgba(0, 10, 30, 0.82);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(74, 158, 255, 0.45);
    border-radius: 50%;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
    z-index: 30;
    transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                background 0.2s ease,
                border-color 0.2s ease,
                transform 0.2s ease,
                box-shadow 0.2s ease;
}

#controls-info-button[hidden] {
    display: none;
}

#controls-info-button:hover,
#controls-info-button:focus-visible {
    background: rgba(74, 158, 255, 0.28);
    border-color: rgba(124, 190, 255, 0.8);
    transform: scale(1.08);
    box-shadow: 0 0 16px rgba(74, 158, 255, 0.4);
    outline: none;
}

#sidebar.collapsed ~ #controls-info-button {
    left: 44px;
}

.control-hint {
    font-size: 0.85rem;
    color: #aaccff;
    margin: 5px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

#guide-line-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 100;
}

.key {
    background: rgba(74, 158, 255, 0.3);
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    color: #fff;
    border: 1px solid rgba(74, 158, 255, 0.5);
    min-width: 50px;
    text-align: center;
}

#body-info {
    position: absolute;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    width: 300px;
    background: rgba(0, 10, 30, 0.9);
    backdrop-filter: blur(15px);
    border-radius: 15px;
    border: 1px solid rgba(74, 158, 255, 0.4);
    padding: 25px;
    pointer-events: auto;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#body-info.hidden {
    opacity: 0;
    transform: translateY(-50%) translateX(20px);
    pointer-events: none;
}

.body-title-row {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 15px;
}

#body-info h2 {
    font-size: 1.5rem;
    color: #4a9eff;
    margin-bottom: 0;
    text-transform: uppercase;
    letter-spacing: 2px;
}

#body-size-subtitle {
    font-size: 0.95rem;
    color: #aaccff;
    opacity: 0.85;
    font-weight: normal;
    display: none; /* Hidden by default on desktop */
}

#minimize-info {
    display: none; /* Hidden by default on desktop */
}

#body-details {
    font-size: 0.9rem;
    line-height: 1.6;
}

#body-details .detail-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid rgba(74, 158, 255, 0.2);
}

#body-details .detail-label {
    color: #88aaff;
}

#body-details .detail-value {
    color: #fff;
    font-weight: 500;
}

#close-info {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    color: #88aaff;
    font-size: 1.5rem;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s;
}

#close-info:hover {
    background: rgba(74, 158, 255, 0.3);
    color: #fff;
}

#hover-tooltip {
    position: fixed;
    pointer-events: none;
    background: rgba(0, 10, 30, 0.9);
    backdrop-filter: blur(15px);
    border-radius: 10px;
    border: 1px solid rgba(74, 158, 255, 0.4);
    padding: 12px 16px;
    z-index: 100;
    transition: opacity 0.2s ease;
    max-width: 280px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

#hover-tooltip.hidden {
    opacity: 0;
    visibility: hidden;
}

#tooltip-name {
    font-size: 1rem;
    color: #4a9eff;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

#tooltip-content {
    font-size: 0.8rem;
    color: #aaccff;
    line-height: 1.5;
}

#tooltip-content .tooltip-row {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin: 3px 0;
}

#tooltip-content .tooltip-label {
    color: #88aaff;
    font-size: 0.75rem;
}

#tooltip-content .tooltip-value {
    color: #fff;
    font-size: 0.75rem;
    text-align: right;
}

/* Orbit line hover effect */
.orbit-highlight {
    filter: drop-shadow(0 0 5px rgba(74, 158, 255, 0.8));
}

#scale-indicator {
    position: absolute;
    bottom: 20px;
    right: 20px;
    pointer-events: auto;
    text-align: right;
}

.scale-bar {
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, transparent, #4a9eff, transparent);
    margin-bottom: 8px;
    margin-left: auto;
}

#scale-label {
    font-size: 0.8rem;
    color: #88aaff;
    text-transform: uppercase;
    letter-spacing: 1px;
}

#scale-toggle-container {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: auto;
    display: flex;
    flex-direction: row;
    gap: 10px;
}

.toggle-btn {
    background: rgba(0, 10, 30, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(74, 158, 255, 0.4);
    border-radius: 20px;
    padding: 10px 20px;
    color: #fff;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none; /* For when used as anchor tag */
}

.toggle-btn:hover {
    background: rgba(74, 158, 255, 0.3);
    border-color: rgba(74, 158, 255, 0.6);
    box-shadow: 0 0 20px rgba(74, 158, 255, 0.3);
}

.toggle-label {
    color: #88aaff;
}

#scale-mode,
#camera-lock-mode,
#orbital-mode,
#show-stars-mode,
#home-indicator-mode,
#constellations-mode {
    color: #4a9eff;
    font-weight: 600;
}

#view-mode {
    color: #4a9eff;
    font-weight: 600;
}

/* Size comparison list item styles */
.object-details .size-bar {
    display: inline-block;
    height: 4px;
    background: linear-gradient(90deg, #4a9eff, #88aaff);
    border-radius: 2px;
    margin-left: 8px;
    vertical-align: middle;
    min-width: 5px;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.5s ease;
}

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

.loading-text {
    font-size: 1.2rem;
    color: #4a9eff;
    letter-spacing: 4px;
    text-transform: uppercase;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

#home-indicator {
    position: fixed;
    pointer-events: none;
    z-index: 1000;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

#home-indicator.hidden {
    opacity: 0;
    visibility: hidden;
}

#home-arrow {
    font-size: 2.5rem;
    color: #4a9eff;
    text-shadow: 0 0 15px rgba(74, 158, 255, 1), 0 0 30px rgba(74, 158, 255, 0.5);
    line-height: 1;
    filter: drop-shadow(0 0 8px rgba(74, 158, 255, 0.8));
}

#home-label {
    font-size: 0.7rem;
    color: #4a9eff;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    text-align: center;
    background: rgba(0, 10, 30, 0.9);
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid rgba(74, 158, 255, 0.5);
    white-space: nowrap;
    box-shadow: 0 0 15px rgba(74, 158, 255, 0.3);
}

#info-popup {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    animation: slideInRight 0.4s ease-out;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    pointer-events: auto;
}

#info-popup.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

#info-popup-content {
    background: rgba(0, 20, 40, 0.95);
    border: 1px solid rgba(74, 158, 255, 0.4);
    border-radius: 8px;
    padding: 20px 24px;
    min-width: 280px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 0 20px rgba(74, 158, 255, 0.2);
    position: relative;
}

#info-popup-close {
    position: absolute;
    top: 8px;
    right: 8px;
    background: transparent;
    border: none;
    color: #88aaff;
    font-size: 1.5rem;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
    line-height: 1;
}

#info-popup-close:hover {
    background: rgba(74, 158, 255, 0.2);
    color: #4a9eff;
}

#info-popup h3 {
    margin: 0 0 12px 0;
    color: #4a9eff;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

#info-popup p {
    margin: 0 0 10px 0;
    color: #aaccff;
    font-size: 0.9rem;
    line-height: 1.5;
}

#info-popup p:last-child {
    margin-bottom: 0;
}

.info-contact {
    font-size: 0.85rem !important;
    color: #88aaff !important;
}

.info-contact a {
    color: #4a9eff;
    text-decoration: none;
    transition: color 0.2s;
}

.info-contact a:hover {
    color: #6bbfff;
    text-decoration: underline;
}

#info-button {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(0, 20, 40, 0.9);
    border: 1px solid rgba(74, 158, 255, 0.4);
    border-radius: 50%;
    color: #4a9eff;
    font-size: 1.2rem;
    font-weight: bold;
    font-style: italic;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    pointer-events: auto;
}

#info-button:hover {
    background: rgba(74, 158, 255, 0.3);
    border-color: rgba(74, 158, 255, 0.6);
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(74, 158, 255, 0.4);
}

#info-button.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ── Timeline Panel ─────────────────────────────────────────────────── */

#timeline-panel {
    position: absolute;
    bottom: 70px; /* above the toggle-buttons row at bottom: 20px */
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 10, 30, 0.88);
    backdrop-filter: blur(14px);
    border: 1px solid rgba(74, 158, 255, 0.4);
    border-radius: 16px;
    padding: 12px 18px 14px;
    pointer-events: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    min-width: 480px;
    z-index: 30;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
}

#timeline-panel.hidden {
    display: none;
}

#tl-date-display {
    font-size: 0.9rem;
    color: #cce0ff;
    letter-spacing: 1px;
    font-variant-numeric: tabular-nums;
    text-align: center;
}

#timeline-controls {
    display: flex;
    align-items: center;
    gap: 6px;
}

.tl-btn {
    background: rgba(74, 158, 255, 0.15);
    border: 1px solid rgba(74, 158, 255, 0.35);
    border-radius: 8px;
    color: #cce0ff;
    font-size: 0.95rem;
    padding: 5px 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 34px;
    text-align: center;
    line-height: 1.2;
}

.tl-btn:hover {
    background: rgba(74, 158, 255, 0.35);
    border-color: rgba(74, 158, 255, 0.7);
    box-shadow: 0 0 10px rgba(74, 158, 255, 0.3);
}

.tl-play {
    background: rgba(74, 158, 255, 0.25);
    border-color: rgba(74, 158, 255, 0.6);
    font-size: 1.05rem;
    padding: 5px 14px;
}

.tl-now-btn {
    font-size: 0.8rem;
    padding: 5px 12px;
}

#tl-controls-slider-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
}

#tl-speed-slider-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.tl-slider-label {
    font-size: 0.75rem;
    color: #ffaa88;
    user-select: none;
    white-space: nowrap;
}

#tl-speed-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 170, 136, 0.25);
    outline: none;
    cursor: pointer;
}

#tl-speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #ffaa88;
    cursor: pointer;
    box-shadow: 0 0 6px rgba(255, 170, 136, 0.6);
    transition: transform 0.1s ease;
}

#tl-speed-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

#tl-speed-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #ffaa88;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 6px rgba(255, 170, 136, 0.6);
    transition: transform 0.1s ease;
}

#tl-speed-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
}



#tl-date-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
}

#tl-date-picker {
    background: rgba(0, 10, 30, 0.7);
    border: 1px solid rgba(74, 158, 255, 0.35);
    border-radius: 8px;
    color: #cce0ff;
    font-size: 0.82rem;
    padding: 5px 8px;
    cursor: pointer;
    outline: none;
    color-scheme: dark;
}

#tl-date-picker:focus {
    border-color: rgba(74, 158, 255, 0.7);
    box-shadow: 0 0 8px rgba(74, 158, 255, 0.2);
}

/* ── Mobile layout: bottom nav bar + slide-up sheets ────────────────────
   Applies to phones/small tablets in portrait, and short landscape phones.
   Keep this query in sync with MOBILE_LAYOUT_MQ in js/main.js. */
@media (max-width: 768px), (max-width: 950px) and (max-height: 500px) and (orientation: landscape) {
    .mobile-only {
        display: flex;
    }

    /* Bottom navigation bar */
    #mobile-nav {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        display: flex;
        justify-content: space-around;
        align-items: stretch;
        background: rgba(0, 5, 15, 0.92);
        backdrop-filter: blur(15px);
        border-top: 1px solid rgba(74, 158, 255, 0.3);
        padding: 4px 4px calc(4px + env(safe-area-inset-bottom));
        z-index: 60;
        pointer-events: auto;
    }

    .mnav-btn {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2px;
        background: none;
        border: none;
        border-radius: 8px;
        color: #88aaff;
        font-size: 0.6rem;
        letter-spacing: 0.5px;
        text-transform: uppercase;
        padding: 4px 0;
        min-height: 48px;
        cursor: pointer;
    }

    .mnav-btn .mnav-icon {
        font-size: 1.25rem;
        line-height: 1.2;
    }

    .mnav-btn.active {
        color: #fff;
        background: rgba(74, 158, 255, 0.2);
    }

    .mnav-btn.hidden {
        display: none;
    }

    /* Info is a minor action: icon only, doesn't get an equal share of the bar */
    #mnav-info {
        flex: 0 0 44px;
    }

    #mnav-info .mnav-label {
        display: none;
    }

    /* Size-compare prev/next arrows at the screen edges */
    #compare-arrows:not(.hidden) {
        display: block;
    }

    .compare-arrow {
        position: fixed;
        top: 50%;
        transform: translateY(-50%);
        width: 44px;
        height: 72px;
        background: rgba(0, 10, 30, 0.6);
        backdrop-filter: blur(8px);
        border: 1px solid rgba(74, 158, 255, 0.4);
        color: #88aaff;
        font-size: 2rem;
        line-height: 1;
        cursor: pointer;
        pointer-events: auto;
        z-index: 40;
        display: flex;
        align-items: center;
        justify-content: center;
        padding-bottom: 6px; /* optically center the chevron glyph */
    }

    #compare-prev {
        left: 0;
        border-left: none;
        border-radius: 0 12px 12px 0;
    }

    #compare-next {
        right: 0;
        border-right: none;
        border-radius: 12px 0 0 12px;
    }

    /* Shared sheet header (Objects / Settings) */
    .sheet-header {
        align-items: center;
        justify-content: center;
        position: relative;
        padding: 12px 10px;
        border-bottom: 1px solid rgba(74, 158, 255, 0.2);
        flex-shrink: 0;
    }

    .sheet-title {
        color: #88aaff;
        text-transform: uppercase;
        letter-spacing: 2px;
        font-size: 0.8rem;
    }

    .sheet-close {
        position: absolute;
        right: 4px;
        top: 50%;
        transform: translateY(-50%);
        width: 44px;
        height: 44px;
        background: none;
        border: none;
        color: #88aaff;
        font-size: 1.6rem;
        cursor: pointer;
    }

    /* Header — compact wordmark, no buttons (Home/Size Compare live in nav/settings) */
    #header,
    #sidebar.collapsed ~ #header {
        left: 12px;
        top: 10px;
        right: auto;
        align-items: flex-start;
        text-align: left;
    }

    #header h1 {
        font-size: 1.1rem;
        letter-spacing: 2px;
    }

    #zoom-level {
        font-size: 0.65rem;
        letter-spacing: 1px;
        margin-top: 2px;
    }

    .header-buttons {
        display: none;
    }

    #controls-info,
    #controls-info-button {
        display: none; /* keyboard/mouse hints don't apply on touch */
    }

    #hover-tooltip {
        display: none; /* no hover on touch; tap opens the info card instead */
    }

    #scale-indicator {
        bottom: auto;
        top: 12px;
        right: 12px;
    }

    .scale-bar {
        width: 70px;
    }

    #scale-label {
        font-size: 0.65rem;
    }

    /* Sidebar → full-width bottom sheet */
    #sidebar {
        top: auto;
        bottom: 0;
        width: 100%;
        height: 70dvh;
        border-right: none;
        border-top: 1px solid rgba(74, 158, 255, 0.4);
        border-radius: 16px 16px 0 0;
        transform: translateY(0);
        padding-bottom: calc(56px + env(safe-area-inset-bottom));
        z-index: 55;
    }

    #sidebar.collapsed {
        transform: translateY(110%);
    }

    #sidebar-toggle {
        display: none;
    }

    .object-item {
        padding: 12px;
        font-size: 0.9rem;
    }

    /* Toggle row → Settings bottom sheet (opened via nav) */
    #scale-toggle-container {
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        transform: translateY(110%);
        flex-direction: column;
        gap: 8px;
        background: rgba(0, 5, 15, 0.95);
        backdrop-filter: blur(15px);
        border-top: 1px solid rgba(74, 158, 255, 0.4);
        border-radius: 16px 16px 0 0;
        padding: 0 14px calc(70px + env(safe-area-inset-bottom));
        max-height: 80dvh;
        overflow-y: auto;
        transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 55;
    }

    #scale-toggle-container.mobile-open {
        transform: translateY(0);
    }

    #scale-toggle-container .sheet-header {
        margin: 0 -14px 6px;
    }

    #scale-toggle-container .toggle-btn {
        width: 100%;
        justify-content: space-between;
        min-height: 48px;
        border-radius: 10px;
        font-size: 0.85rem;
        background: rgba(0, 20, 40, 0.6);
    }

    /* Timeline → sheet above the nav; compact by default, chevron expands */
    #timeline-panel {
        left: 0;
        right: 0;
        width: 100%;
        min-width: 0;
        bottom: calc(56px + env(safe-area-inset-bottom));
        transform: translateY(130%);
        border-radius: 16px 16px 0 0;
        border-left: none;
        border-right: none;
        padding: 10px 12px;
        max-height: calc(100dvh - 120px);
        overflow-y: auto;
        transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 57;
    }

    #body-info:not(.hidden).minimized ~ #timeline-panel {
        bottom: calc(118px + env(safe-area-inset-bottom)) !important;
    }

    #timeline-panel.mobile-open {
        transform: translateY(0);
    }

    #timeline-panel.hidden {
        display: none;
    }

    #timeline-controls {
        gap: 3px !important;
    }

    #timeline-controls .tl-btn {
        min-width: 32px !important;
        min-height: 32px !important;
        padding: 4px 6px !important;
        font-size: 0.82rem !important;
    }

    #tl-controls-slider-row {
        display: flex !important;
        align-items: center !important;
        justify-content: space-between !important;
        gap: 8px !important;
        width: 100% !important;
    }

    #tl-speed-slider-row {
        display: flex !important;
        align-items: center !important;
        gap: 6px !important;
        flex: 1 !important;
    }

    .tl-slider-label {
        display: none !important; /* hide Reverse/Forward labels on mobile to save space */
    }

    #tl-speed-label {
        min-width: 52px !important;
        font-size: 0.72rem !important;
    }

    #tl-date-row {
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
        width: 100% !important;
        gap: 6px !important;
        margin-bottom: 6px !important;
    }

    #tl-date-display {
        font-size: 0.78rem !important;
        white-space: nowrap !important;
        margin-right: 2px !important;
    }

    .tl-date-btn {
        font-size: 0.76rem !important;
        padding: 4px 6px !important;
        min-height: 28px !important;
        white-space: nowrap !important;
    }

    .tl-now-btn {
        font-size: 0.76rem !important;
        padding: 4px 8px !important;
        min-height: 28px !important;
        white-space: nowrap !important;
    }

    /* Beta popup + info button */
    #info-popup {
        top: 12px;
        right: 12px;
        left: 12px;
        min-width: auto;
    }

    #info-popup-content {
        min-width: auto;
    }

    #info-button {
        top: auto;
        bottom: calc(64px + env(safe-area-inset-bottom));
        right: 12px;
        display: none; /* the nav Info button replaces the floating one on mobile */
    }
}

/* Portrait phones: body info card slides up above the nav bar */
@media (max-width: 768px) and (orientation: portrait), (max-width: 500px) {
    #body-info {
        top: auto;
        bottom: calc(64px + env(safe-area-inset-bottom));
        right: 12px;
        left: 12px;
        width: auto;
        max-height: 34dvh;
        overflow-y: auto;
        transform: translateY(0);
        margin: 0;
        padding: 14px 14px 12px;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.6);
        transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
        z-index: 56;
    }

    #body-info.hidden {
        opacity: 0;
        transform: translateY(140%);
        pointer-events: none;
    }

    #minimize-info {
        display: flex;
        position: absolute;
        top: 12px;
        right: 42px; /* positioned next to close-info at right: 12px */
        background: none;
        border: none;
        color: #88aaff;
        font-size: 0.8rem;
        cursor: pointer;
        width: 30px;
        height: 30px;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        transition: all 0.2s;
        z-index: 60;
    }

    .body-title-row {
        margin-bottom: 8px;
        align-items: center;
    }

    #body-info.minimized .body-title-row {
        margin-bottom: 0;
    }

    #body-info h2 {
        font-size: 1.1rem;
        margin-bottom: 0;
        padding-right: 65px; /* keep clear of both buttons */
    }

    #body-info.minimized {
        max-height: 44px; /* compact docked height showing just title line */
        padding: 10px 14px;
        overflow: hidden;
    }

    #body-info.minimized #body-details {
        opacity: 0;
        pointer-events: none;
        display: none !important;
    }

    #body-info.minimized #minimize-info {
        transform: rotate(180deg); /* point up to expand */
    }

    #body-info.minimized #body-size-subtitle {
        display: inline-block;
        font-size: 0.85rem;
        color: #aaccff;
        font-weight: normal;
        margin-left: 2px;
    }

    /* Stats as a compact 2-column grid instead of one full-width row each */
    #body-details {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 6px 8px;
        line-height: 1.35;
    }

    #body-details .detail-row {
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        gap: 1px;
        padding: 5px 9px;
        background: rgba(0, 20, 40, 0.5);
        border: 1px solid rgba(74, 158, 255, 0.15);
        border-radius: 8px;
    }

    #body-details .detail-label {
        font-size: 0.62rem;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }

    #body-details .detail-value {
        font-size: 0.82rem;
        text-align: left;
    }

    /* Description / fun facts / scale comparison keep the full width */
    #body-details .detail-row.detail-block {
        grid-column: 1 / -1;
        background: none;
        border: none;
        border-radius: 0;
        padding: 0;
    }
}

/* Short landscape phones: hide header, body info docks right */
@media (max-width: 950px) and (max-height: 500px) and (orientation: landscape) {
    #header {
        display: none; /* maximize canvas space */
    }

    /* Move bottom buttons row to the right edge as a vertical sidebar */
    #mobile-nav {
        top: 0 !important;
        bottom: 0 !important;
        right: 0 !important;
        left: auto !important;
        width: 64px !important;
        height: 100vh !important;
        flex-direction: column !important;
        justify-content: center !important;
        align-items: center !important;
        border-top: none !important;
        border-left: 1px solid rgba(74, 158, 255, 0.3) !important;
        padding: calc(10px + env(safe-area-inset-top)) 4px 10px !important;
        gap: 6px !important;
    }

    .mnav-btn {
        width: 100% !important;
        flex: 0 0 auto !important;
        min-height: 50px !important;
    }

    /* Move body info card to the bottom and make it wide, clearing the right nav */
    #body-info {
        top: auto !important;
        bottom: 12px !important;
        left: 12px !important;
        right: 76px !important; /* 64px nav + 12px margin */
        width: auto !important;
        max-height: 34dvh !important;
        transform: translateY(0) !important;
        overflow-y: auto;
        padding: 14px 14px 12px !important;
        z-index: 56;
        transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease, max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1) !important;
    }

    #body-info.hidden {
        opacity: 0 !important;
        transform: translateY(140%) !important;
        pointer-events: none !important;
    }

    #minimize-info {
        display: flex !important;
        position: absolute !important;
        top: 12px !important;
        right: 42px !important; /* next to close button */
        background: none !important;
        border: none !important;
        color: #88aaff !important;
        font-size: 0.8rem !important;
        cursor: pointer !important;
        width: 30px !important;
        height: 30px !important;
        align-items: center !important;
        justify-content: center !important;
        border-radius: 50% !important;
        transform: none !important; /* normal vertical chevron */
        transition: all 0.2s !important;
        z-index: 60 !important;
    }

    /* Collapsed minimized bottom bar state in landscape mode */
    #body-info.minimized {
        max-height: 44px !important;
        padding: 10px 14px !important;
        overflow: hidden !important;
    }

    #body-info.minimized #body-details,
    #body-info.minimized #body-desc {
        opacity: 0 !important;
        pointer-events: none !important;
        display: none !important;
    }

    #body-info.minimized #minimize-info {
        transform: rotate(180deg) !important; /* point up to expand */
    }

    #body-info.minimized #body-size-subtitle {
        display: inline-block !important;
        font-size: 0.85rem !important;
        color: #aaccff !important;
        font-weight: normal !important;
        margin-left: 2px !important;
    }

    #body-info h2 {
        font-size: 1.2rem;
        margin-bottom: 10px;
    }

    #body-details {
        font-size: 0.8rem;
    }

    #body-details .detail-row {
        padding: 4px 0;
    }

    /* Shift next comparison arrow left so it doesn't overlap right nav bar */
    #compare-next {
        right: 64px !important;
    }

    /* Shift timeline panel left and adjust bottom spacing to clear right nav */
    #timeline-panel {
        right: 64px !important;
        width: calc(100% - 64px) !important;
        bottom: 0 !important;
        z-index: 57 !important;
    }

    #body-info:not(.hidden).minimized ~ #timeline-panel {
        bottom: 66px !important; /* 12px bottom + 44px minimized height + 10px spacing */
    }

    /* Shift beta popup left so it centers inside the remaining space */
    #info-popup {
        right: 76px !important;
    }

    #sidebar {
        height: auto;
        max-height: calc(100dvh - 60px);
    }

    #scale-toggle-container {
        right: 64px !important;
        width: calc(100% - 64px) !important;
        max-height: 100dvh !important;
        height: auto !important;
        padding: 0 14px 14px !important;
    }
}