/* snake.css - Full Production Style and Interface Layout System */
:root {
    --g-blue: #4285f4;
    --g-red: #ea4335;
    --g-yellow: #fbbc05;
    --g-green: #34a853;
    
    --google-score-bg: #4ec043;
    --google-grass-light: #aad751;
    --google-grass-dark: #a2d149;
    --google-container-frame: #578a34;
    
    --snake-skin-primary: #4674e9;
    --snake-skin-shadow: #3762cf;
    --apple-core-color: #e93b16;
    
    --interface-card-bg: #ffffff;
    --interface-text-main: #1f2937;
    --interface-text-muted: #6b7280;
    --interface-borders: #e5e7eb;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    -webkit-user-select: none;
    user-select: none;
}

body {
    background-color: var(--google-container-frame);
    color: var(--interface-text-main);
    min-height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    padding: 10px;
}

/* Master Layout Encapsulation Viewport Box */
#app-wrapper {
    width: 100%;
    max-width: 540px;
    background-color: var(--interface-card-bg);
    border-radius: 16px;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Header Action Panels UI */
#app-bar {
    background-color: #ffffff;
    height: 52px;
    border-bottom: 1px solid var(--interface-borders);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
}

.bar-section {
    display: flex;
    align-items: center;
    flex: 1;
}
.bar-section.center {
    justify-content: center;
    flex: 2;
}
.bar-section.right {
    justify-content: flex-end;
}

.app-brand {
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--interface-text-main);
}

.bar-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    color: var(--interface-text-muted);
    transition: background-color 0.15s, color 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.bar-btn:hover {
    background-color: var(--interface-borders);
    color: var(--interface-text-main);
}
.bar-btn svg {
    width: 22px;
    height: 22px;
    fill: currentColor;
}

/* Score Panel Display Mechanics */
#game-scoreboard {
    background-color: var(--google-score-bg);
    height: 64px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 60px;
    box-shadow: inset 0 -4px 6px rgba(0,0,0,0.06);
}

.metric-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.metric-value {
    color: #ffffff;
    font-size: 24px;
    font-weight: 800;
    font-family: monospace;
}

.metric-icon {
    width: 28px;
    height: 28px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}
.asset-apple {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23ea4335"><circle cx="12" cy="13" r="8"/><path d="M12 5c0-2 2-3 2-3s-2 1-2 3z" stroke="%2334a853" stroke-width="2"/></svg>');
}
.asset-trophy {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23fbbc05"><path d="M19 2H5v2h3v3c0 2.2 1.8 4 4 4h0c2.2 0 4-1.8 4-4V4h3V2zm-2 5c0 1.1-.9 2-2 2h0c-1.1 0-2-.9-2-2V4h4v3zM12 11v6H9v2h6v-2h-3v-6h0z"/></svg>');
}

/* Core Rendering Workspace Stage Config */
#viewport-stage {
    position: relative;
    width: 100%;
    background-color: var(--google-grass-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    aspect-ratio: 1 / 1;
}

#canvas-constraint {
    width: 100%;
    height: 100%;
    max-height: 540px;
}

#game-surface {
    display: block;
    width: 100%;
    height: 100%;
    background-color: var(--google-grass-light);
}

/* Fullscreen Menu Intermediary Layer View */
#modal-screen-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease-in-out;
    z-index: 100;
}
#modal-screen-overlay.state-visible {
    opacity: 1;
    pointer-events: auto;
}

#overlay-dialog-panel {
    background-color: #ffffff;
    width: 88%;
    max-width: 440px;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 12px 30px rgba(0,0,0,0.25);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    transform: scale(0.9);
    transition: transform 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
#modal-screen-overlay.state-visible #overlay-dialog-panel {
    transform: scale(1);
}

#overlay-main-heading {
    font-size: 22px;
    font-weight: 800;
    color: var(--interface-text-main);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

#overlay-sub-heading {
    font-size: 13px;
    color: var(--interface-text-muted);
    line-height: 1.5;
    margin-bottom: 20px;
    padding: 0 8px;
}

/* Option Preselector Carousel Rack */
#cosmetic-preselector-rack {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    width: 100%;
    margin-bottom: 24px;
}

.selector-card {
    border: 2px solid var(--interface-borders);
    border-radius: 10px;
    padding: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.15s linear;
}
.selector-card:hover {
    background-color: #f9fafb;
    border-color: #cbd5e1;
}
.selector-card.active {
    border-color: var(--g-blue);
    background-color: #eff6ff;
}

.preview-swatch {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}
.preview-swatch.red-apple { background-color: var(--g-red); }
.preview-swatch.gold-apple { background-color: var(--g-yellow); }
.preview-swatch.blue-snake { background-color: var(--g-blue); }
.preview-swatch.purple-snake { background-color: #a855f7; }

.selector-card span {
    font-size: 12px;
    font-weight: 700;
    color: var(--interface-text-main);
}

/* Master Primary Action Control Switch Button */
.g-primary-circle-btn {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background-color: var(--g-blue);
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 14px rgba(66, 133, 244, 0.4);
    transition: transform 0.15s, background-color 0.15s;
}
.g-primary-circle-btn:hover {
    transform: scale(1.05);
    background-color: #2563eb;
}
.g-primary-circle-btn:active {
    transform: scale(0.95);
}
.g-primary-circle-btn svg {
    width: 32px;
    height: 32px;
    fill: #ffffff;
    margin-left: 4px;
}

/* Responsive Accessibility Control Pad Deck Framework */
#mobile-control-deck {
    background-color: #f3f4f6;
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    border-top: 1px solid var(--interface-borders);
}

.deck-row {
    display: flex;
    justify-content: center;
    width: 100%;
}

.d-pad-btn {
    width: 60px;
    height: 50px;
    background-color: #ffffff;
    border: 1px solid var(--interface-borders);
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    color: var(--interface-text-main);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.1s, transform 0.1s;
}
.d-pad-btn:active {
    background-color: #e5e7eb;
    transform: scale(0.95);
}
.d-pad-spacer {
    width: 64px;
}

/* --- DETAILED COMPACT OPTION PREFERENCES OVERLAY DESIGN --- */
.sidebar-drawer-dimmer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    z-index: 5000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease-out;
}
.sidebar-drawer-dimmer.open {
    opacity: 1;
    pointer-events: auto;
}

.drawer-surface {
    position: absolute;
    top: 0;
    right: -320px;
    width: 320px;
    height: 100%;
    background-color: #ffffff;
    box-shadow: -4px 0 25px rgba(0,0,0,0.15);
    transition: right 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    padding: 24px;
}
.sidebar-drawer-dimmer.open .drawer-surface {
    right: 0;
}

/* Custom Override Configuration specifically for our Preferences Center View */
.drawer-surface.settings-modal {
    position: relative;
    right: auto;
    width: 90%;
    max-width: 400px;
    height: auto;
    max-height: 85vh;
    border-radius: 16px;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
    transform: scale(0.9);
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.sidebar-drawer-dimmer.open .drawer-surface.settings-modal {
    transform: scale(1);
}

.drawer-header-title {
    font-size: 20px;
    font-weight: 800;
    text-align: left;
    margin-bottom: 20px;
    color: var(--interface-text-main);
    letter-spacing: -0.02em;
}

.close-drawer-btn {
    position: absolute;
    top: 22px;
    right: 24px;
    left: auto;
    font-size: 18px;
    font-weight: bold;
    color: var(--interface-text-muted);
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.1s ease;
}
.close-drawer-btn:hover { color: var(--g-red); }

.drawer-scroll-body {
    flex-grow: 1;
    overflow-y: auto;
}

/* Settings Visual Component Blocks */
.settings-group {
    margin-bottom: 18px;
    background-color: #f8fafc;
    border: 1px solid #f1f5f9;
    border-radius: 12px;
    padding: 14px;
}
.group-title {
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--g-blue);
    letter-spacing: 0.05em;
    margin-bottom: 10px;
}

.config-row-item {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid #f1f5f9;
    gap: 16px;
}
.config-row-item:last-of-type { border-bottom: none; padding-bottom: 0; }
.config-row-item:first-of-type { padding-top: 0; }

.config-text { flex: 1; text-align: left; }
.config-lbl { font-weight: 700; font-size: 14px; color: var(--interface-text-main); }
.config-desc { font-size: 11px; color: var(--interface-text-muted); line-height: 1.4; margin-top: 2px; }

.g-select-control {
    width: 130px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid #cbd5e1;
    background-color: #ffffff;
    padding: 0 8px;
    font-size: 13px;
    font-weight: 700;
    color: var(--interface-text-main);
    cursor: pointer;
    outline: none;
}
.g-select-control:hover { border-color: #94a3b8; }
.g-select-control:focus { border-color: var(--g-blue); }

/* Google-inspired Sliders Toggle Switch Element */
.g-switch-node {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}
.g-switch-node input { opacity: 0; width: 0; height: 0; }
.g-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #cbd5e1;
    transition: .2s;
    border-radius: 24px;
}
.g-slider:before {
    position: absolute;
    content: "";
    height: 18px; width: 18px;
    left: 3px; bottom: 3px;
    background-color: white;
    transition: .2s;
    border-radius: 50%;
}
input:checked + .g-slider { background-color: var(--g-green); }
input:checked + .g-slider:before { transform: translateX(20px); }

/* Stats Profile Dashboard View Grid Layout Elements */
.statistics-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}
.dashboard-metric-tile {
    background-color: #f9fafb;
    border: 1px solid var(--interface-borders);
    border-radius: 8px;
    padding: 14px;
    text-align: center;
}
.dash-val {
    display: block;
    font-size: 24px;
    font-weight: 800;
    color: var(--g-blue);
    font-family: monospace;
}
.dash-lbl {
    font-size: 10px;
    color: var(--interface-text-muted);
    text-transform: uppercase;
    font-weight: 700;
    margin-top: 4px;
    display: block;
}

.g-danger-action-btn {
    width: 100%;
    padding: 12px;
    background-color: #fef2f2;
    border: 1px solid #fee2e2;
    color: var(--g-red);
    border-radius: 8px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.15s;
}
.g-danger-action-btn:hover { background-color: #fee2e2; }

/* Responsive Media Handling Layout Adjustments for Desktop Laptops */
@media (min-height: 800px) {
    #mobile-control-deck { display: none; }
    #app-wrapper { max-width: 500px; }
}
@media (max-height: 640px) {
    #app-bar { height: 44px; }
    #game-scoreboard { height: 48px; }
    #mobile-control-deck { display: none; }
}