:root {
    --bg-color: #050b1a;
    --panel-bg: rgba(10, 25, 50, 0.7);
    --panel-border: rgba(100, 180, 255, 0.2);
    --accent: #00d2ff;
    --accent-glow: rgba(0, 210, 255, 0.4);
    --text-main: #e0f0ff;
    --text-dim: #9bb7d0;
}

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

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

#canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#ui-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    padding: 24px;
}

.main-title {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 2px;
    text-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.9),
        0 0 20px var(--accent-glow);
    color: var(--accent);
    margin: 0;
    text-align: center;
    flex: initial;
}

.header-header {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    width: 100%;
}

.home-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    color: var(--accent);
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(8px);
    pointer-events: auto;
    z-index: 100;
}

.home-btn:hover {
    background: var(--accent);
    color: #050b1a;
    box-shadow: 0 0 15px var(--accent-glow);
    transform: scale(1.05);
}

.ui-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    color: var(--accent);
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(8px);
    pointer-events: auto;
    z-index: 100;
}

.ui-toggle-btn:hover {
    background: var(--accent);
    color: #050b1a;
    box-shadow: 0 0 15px var(--accent-glow);
    transform: scale(1.05);
}

.version-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    font-size: 11px;
    color: var(--text-dim);
    opacity: 0.7;
    font-family: 'Inter', sans-serif;
    letter-spacing: 1px;
    pointer-events: none;
    z-index: 50;
}

.panel {
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--panel-border);
    border-radius: 16px;
    padding: 16px;
    pointer-events: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.panel-header .label {
    margin-bottom: 0 !important;
}

.toggle-btn {
    background: none;
    border: none;
    color: var(--accent);
    font-size: 20px;
    cursor: pointer;
    line-height: 1;
    padding: 0 4px;
    transition: transform 0.3s ease;
}

.toggle-btn:hover {
    color: #fff;
    text-shadow: 0 0 10px var(--accent-glow);
}

.panel-content {
    margin-top: 10px;
    transition: all 0.3s ease;
    overflow: hidden;
    max-height: 200px;
}

.collapsible.collapsed .panel-content {
    margin-top: 0;
    max-height: 0;
    opacity: 0;
    pointer-events: none;
}

.collapsible.collapsed {
    padding-bottom: 8px;
}

.nav-panel {
    align-self: center;
    margin-bottom: 8px;
    max-width: 400px;
    padding: 8px 12px;
}

.nav-panel .label {
    font-size: 11px;
    margin-bottom: 6px;
}

.nav-panel .dir-btn {
    padding: 6px 14px; /* Smaller buttons */
    font-size: 12px;
}

.season-panel {
    align-self: center;
    margin-bottom: 12px;
    max-width: 400px;
    padding: 8px 12px;
}

.season-panel .label {
    font-size: 11px; /* Smaller label */
    margin-bottom: 6px;
}

.season-panel .season-btn {
    padding: 6px 14px; /* Smaller buttons */
    font-size: 12px;
}

.controls-panel {
    margin-top: auto;
    align-self: center;
    width: fit-content;
    max-width: 900px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: space-around;
    padding: 20px;
}

.label {
    font-size: 13px;
    color: var(--text-dim);
    margin-bottom: 10px;
    text-align: center;
}

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

button.dir-btn, button.season-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    color: var(--text-main);
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

button.dir-btn:hover, button.season-btn:hover {
    background: rgba(0, 210, 255, 0.2);
    border-color: var(--accent);
    transform: translateY(-2px);
}

button.dir-btn.active, button.season-btn.active {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 15px var(--accent-glow);
}

.control-group {
    flex: 1;
    min-width: 200px;
    max-width: 300px;
}

.label-row {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    margin-bottom: 10px;
}

#lat-val {
    font-weight: 700;
    color: var(--accent);
}

input[type="range"] {
    width: 100%;
    margin-bottom: 8px;
}

.preset-links {
    display: flex;
    justify-content: space-between;
    gap: 8px;
}

.link {
    font-size: 11px;
    color: var(--text-dim);
    cursor: pointer;
    text-decoration: underline;
}

.link:hover {
    color: var(--accent);
}

.toggle-row {
    display: flex;
    flex-wrap: wrap; /* Addition: allow wrapping for mobile */
    gap: 16px 24px;  /* Vertical and horizontal gap */
    align-items: center;
}

.toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 12px;
    white-space: nowrap;
}

/* Custom Checkbox Toggle Slider */
.toggle input {
    display: none;
}

.slider {
    position: relative;
    width: 36px;
    height: 20px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    transition: .3s;
}

.slider:before {
    content: "";
    position: absolute;
    width: 14px;
    height: 14px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: .3s;
}

input:checked + .slider {
    background-color: var(--accent);
}

input:checked + .slider:before {
    transform: translateX(16px);
}

.info-panel {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 14px;
    padding: 10px 16px;
    color: var(--accent);
    background: rgba(0, 10, 30, 0.7);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
    border: 1px solid rgba(0, 210, 255, 0.3);
    z-index: 100;
}

.bottom-ui-row {
    margin-top: auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    pointer-events: none;
    z-index: 10;
}

.bottom-ui-row > * {
    pointer-events: auto;
}

/* Mobile Adjustments */
#side-indicators {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 40px;
    pointer-events: none;
    z-index: 5;
}

.side-label {
    background: rgba(0, 15, 40, 0.7); /* Darker background for contrast */
    border: 1px solid rgba(0, 210, 255, 0.5);
    padding: 12px 24px;
    border-radius: 30px;
    color: var(--accent);
    font-size: 22px;
    font-weight: 700;
    backdrop-filter: blur(8px); /* Stronger blur */
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.9); /* Text shadow for high contrast */
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    transition: all 0.3s ease;
    pointer-events: auto; /* Enable clicks */
    cursor: pointer;
}

.side-label:hover {
    background: rgba(0, 210, 255, 0.2);
    border-color: rgba(0, 210, 255, 0.8);
    transform: scale(1.05); /* Just scale, no vertical translation */
}

@media (max-width: 768px) {
    .controls-panel .panel-content {
        padding: 10px;
    }
    .toggle-row {
        gap: 12px 16px; /* Tighter gap for mobile */
        justify-content: flex-start;
    }
    .toggle {
        font-size: 11px; /* Further reduced for mobile */
        min-width: 90px;
        gap: 6px;        /* Tighter gap for mobile */
    }
    .side-label {
        font-size: 16px;
        padding: 8px 14px;
    }
    #side-indicators {
        padding: 0 10px;
    }
    .bottom-ui-row {
        flex-direction: row-reverse;
        align-items: flex-end;
        gap: 8px;
        padding: 0 5px 10px 5px;
    }
    .info-panel {
        position: relative;
        top: 0;
        right: 0;
        bottom: auto;
        margin: 0;
        flex: 0.8; /* Narrowed from 1.0 */
        font-size: 11px;
        padding: 8px 6px;
        border-radius: 12px;
        line-height: 1.4;
    }
    .controls-panel {
        position: relative;
        flex: 2; /* Increased from 1.5 to take more space */
        margin-top: 0;
        padding: 10px;
        align-self: stretch;
        width: auto;
        max-width: none;
    }
    .controls-panel .panel-header .label {
        display: none; /* Hide 'Display/Lat Settings' text on mobile to save space */
    }
    .controls-panel .panel-content {
        padding: 8px;
    }
}

/* UI Hidden State */
/* UI Hidden State */
body.ui-hidden .main-title,
body.ui-hidden .version-badge,
body.ui-hidden .side-indicators,
body.ui-hidden .home-btn {
    opacity: 0;
    pointer-events: none;
}

/* Hide panels by making them transparent, allowing descendants like .animate-toggle to stay visible */
body.ui-hidden .panel:not(.info-panel) {
    background: transparent;
    border-color: transparent;
    box-shadow: none;
    backdrop-filter: none;
    pointer-events: none;
}

/* Hide all children of hidden panels EXCEPT the animate toggle */
body.ui-hidden .panel:not(.info-panel) > *:not(.panel-header),
body.ui-hidden .panel:not(.info-panel) .panel-header > *:not(.animate-toggle) {
    opacity: 0;
    pointer-events: none;
}

/* Persistence for Animation Toggle in Hidden Mode */
body.ui-hidden .animate-toggle {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 1;
    pointer-events: auto;
    z-index: 9999;
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--accent);
    padding: 8px 20px;
    border-radius: 40px;
    box-shadow: 0 0 20px var(--accent-glow);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

body.ui-hidden .info-panel {
    opacity: 1;
    pointer-events: auto;
}

body.ui-hidden .ui-toggle-btn {
    opacity: 0.65;
    background: rgba(10, 25, 50, 0.4);
    border-color: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

body.ui-hidden .ui-toggle-btn:hover {
    opacity: 1;
    background: var(--accent);
    color: #050b1a;
    box-shadow: 0 0 20px var(--accent-glow);
}

.panel, .main-title, .version-badge, .side-indicators, .home-btn {
    transition: opacity 0.5s ease;
}