/* CSS Reset & Variable Definitions */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&display=swap');

:root {
    --bg-dark: #0a051b;
    --primary-glow: rgba(147, 51, 234, 0.4);
    --secondary-glow: rgba(59, 130, 246, 0.4);
    --gold-glow: rgba(234, 179, 8, 0.5);
    
    --purple: #a855f7;
    --blue: #3b82f6;
    --gold: #eab308;
    --pink: #ec4899;
    --cyan: #06b6d4;
    --danger: #ef4444;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --glass-bg: rgba(15, 10, 30, 0.5);
    --glass-border: rgba(255, 255, 255, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-drag: none;
}

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--bg-dark);
    font-family: 'Outfit', sans-serif;
    color: var(--text-main);
}

/* 3D Canvas */
#game-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    display: block;
}

/* UI Overlay Container */
#ui-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none; /* Let clicks pass to canvas if not on UI elements */
}

/* Screen Wrapper */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    padding: 2rem;
}

.screen.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto; /* Enable interaction for active overlay screen */
}

/* --- HOME SCREEN --- */
#screen-home {
    background: radial-gradient(circle at center, rgba(15, 5, 30, 0.3) 0%, rgba(5, 2, 10, 0.7) 100%);
    justify-content: space-around;
}

.logo-container {
    text-align: center;
    animation: floating 6s ease-in-out infinite;
}

.glow-text {
    font-size: 5rem;
    font-weight: 800;
    letter-spacing: 0.15em;
    background: linear-gradient(135deg, var(--purple) 0%, var(--pink) 50%, var(--cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 20px var(--primary-glow));
    text-transform: uppercase;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    letter-spacing: 0.2em;
    margin-top: 0.5rem;
    text-transform: uppercase;
}

.modes-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 800px;
    width: 100%;
}

.mode-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 1.5rem;
    cursor: pointer;
    text-align: left;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.mode-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mode-card:hover {
    transform: translateY(-5px);
    border-color: rgba(168, 85, 247, 0.4);
    box-shadow: 0 10px 25px -5px var(--primary-glow);
}

.mode-card:hover::before {
    opacity: 1;
}

.mode-card .icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.mode-card .title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.mode-card .desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.home-footer {
    display: flex;
    justify-content: center;
    width: 100%;
}

/* --- GLASS BUTTONS --- */
.glass-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--text-main);
    padding: 0.75rem 2rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.glass-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.glass-btn.primary {
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.3) 0%, rgba(59, 130, 246, 0.3) 100%);
    border-color: rgba(168, 85, 247, 0.4);
}

.glass-btn.primary:hover {
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.5) 0%, rgba(59, 130, 246, 0.5) 100%);
    box-shadow: 0 0 15px var(--primary-glow);
}

.glass-btn.danger {
    border-color: rgba(239, 68, 68, 0.3);
}

.glass-btn.danger:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--danger);
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.3);
}

.glass-btn-round {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--text-main);
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    pointer-events: auto;
}

.glass-btn-round:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}

/* --- HUD SCREEN --- */
#screen-hud {
    justify-content: space-between;
    align-items: stretch;
    pointer-events: none; /* Let through clicks in empty areas */
}

.hud-top {
    display: flex;
    justify-content: space-between;
    width: 100%;
}

.hud-stat {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    pointer-events: auto;
}

#hud-score-container {
    align-items: flex-start;
    border-left: 4px solid var(--purple);
}

#hud-mode-container {
    font-weight: 800;
    letter-spacing: 0.1em;
    font-size: 1.1rem;
    color: var(--cyan);
    align-items: center;
}

#hud-stats-container {
    align-items: flex-end;
    gap: 0.25rem;
    font-weight: 600;
}

.mini-stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hud-stat .label {
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    color: var(--text-muted);
}

.hud-stat .value {
    font-size: 1.5rem;
    font-weight: 800;
}

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

.boost-bar-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    display: flex;
    flex-direction: column;
    width: 300px;
    pointer-events: auto;
}

.boost-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
}

.boost-bar-bg {
    width: 100%;
    height: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 9999px;
    overflow: hidden;
}

#hud-boost-fill {
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--blue) 0%, var(--cyan) 100%);
    box-shadow: 0 0 8px var(--secondary-glow);
    border-radius: 9999px;
    transition: width 0.1s linear;
}

.hud-actions {
    display: flex;
    gap: 1rem;
}

/* --- GLASS PANELS --- */
.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 24px;
    padding: 2.5rem;
    width: 100%;
    max-width: 450px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    animation: scaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    z-index: 100;
}

.panel-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    background: linear-gradient(135deg, var(--purple) 0%, var(--cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.panel-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--cyan);
}

.pause-menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
}

.pause-menu-buttons .glass-btn {
    width: 100%;
}

/* --- SUB PANELS (Controls settings) --- */
.sub-panel {
    position: absolute;
    max-width: 450px;
    width: calc(100% - 4rem);
}

.hidden {
    display: none !important;
}

.settings-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
}

.setting-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.05);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.radio-label:hover {
    background: rgba(255,255,255,0.08);
}

.radio-label input[type="radio"] {
    accent-color: var(--purple);
    width: 1.2rem;
    height: 1.2rem;
}

.radio-label span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-main) !important;
    text-transform: none !important;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.05);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: none !important;
}

.checkbox-label:hover {
    background: rgba(255,255,255,0.08);
}

.checkbox-label input[type="checkbox"] {
    accent-color: var(--purple);
    width: 1.2rem;
    height: 1.2rem;
}

.checkbox-label span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-main) !important;
    text-transform: none !important;
}

.panel-actions {
    width: 100%;
}

.panel-actions .glass-btn {
    width: 100%;
}

/* Animations */
@keyframes floating {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

@keyframes scaleIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* RESULTS SCREEN STATS */
.results-stats {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    margin-bottom: 1rem;
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.result-row .label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

.result-row .value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--cyan);
}