/* ==========================================================================
   CSS Variables & Resets
   ========================================================================== */
:root {
    --primary-color: #ff6a00; /* Vibrant Orange */
    --primary-glow: rgba(255, 106, 0, 0.6);
    --secondary-color: #00f0ff; /* Neon Cyan */
    --secondary-glow: rgba(0, 240, 255, 0.6);
    --bg-dark: #0a0a12;
    --text-light: #ffffff;
    --text-muted: #a0a0b0;
    --glass-bg: rgba(20, 20, 30, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Montserrat', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none; /* Prevent text selection during gameplay */
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: var(--font-body);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    touch-action: none; /* Prevent browser scrolling/zooming on mobile */
}

/* ==========================================================================
   Main Layout & Canvas
   ========================================================================== */
#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at center, #1a1a2e 0%, #000000 100%);
}

#game-canvas {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

/* ==========================================================================
   UI Screens & Glassmorphism
   ========================================================================== */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none; /* Let clicks pass through if hidden */
    opacity: 0;
    transition: opacity 0.4s ease;
}

.screen.active {
    pointer-events: auto;
    opacity: 1;
}

.screen.hidden {
    display: none;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), inset 0 0 0 1px rgba(255,255,255,0.05);
    max-width: 90%;
    width: 400px;
    transform: translateY(20px);
    animation: floatUp 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes floatUp {
    to {
        transform: translateY(0);
    }
}

/* ==========================================================================
   Typography & Menu Elements
   ========================================================================== */
.menu-icon {
    width: 100px;
    height: 100px;
    margin-bottom: 20px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.game-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 30px;
    text-shadow: 0 0 20px var(--primary-glow);
    letter-spacing: 2px;
}

.game-title span {
    color: var(--primary-color);
    font-size: 2rem;
}

.title-success {
    font-family: var(--font-heading);
    font-size: 3rem;
    color: var(--secondary-color);
    text-shadow: 0 0 20px var(--secondary-glow);
    margin-bottom: 20px;
    text-transform: uppercase;
}

/* ==========================================================================
   Tutorial Box
   ========================================================================== */
.tutorial-box {
    background: rgba(0,0,0,0.4);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 30px;
    text-align: left;
}

.tutorial-box h3 {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 15px;
    letter-spacing: 1px;
}

.instruction {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    font-size: 0.95rem;
    font-weight: 600;
}

.instruction:last-child {
    margin-bottom: 0;
}

.icon-drag, .icon-release, .icon-star {
    width: 24px;
    height: 24px;
    margin-right: 15px;
    border-radius: 50%;
    display: inline-block;
}

.icon-drag { background: radial-gradient(circle, var(--text-light) 30%, transparent 70%); border: 2px dashed var(--text-muted); }
.icon-release { background: var(--primary-color); box-shadow: 0 0 10px var(--primary-glow); }
.icon-star { background: var(--secondary-color); clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%); }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn-primary {
    background: linear-gradient(135deg, #ff8a00 0%, #e52e71 100%);
    color: white;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    border: none;
    padding: 15px 40px;
    border-radius: 30px;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(229, 46, 113, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
    width: 100%;
    letter-spacing: 1px;
}

.btn-primary:active {
    transform: scale(0.95);
}

.btn-primary:hover {
    box-shadow: 0 15px 25px rgba(229, 46, 113, 0.6);
}

/* ==========================================================================
   In-Game HUD
   ========================================================================== */
#screen-hud {
    align-items: flex-start;
    justify-content: space-between;
    padding: 20px;
    pointer-events: none; /* Only buttons should be clickable */
}

.hud-top {
    display: flex;
    gap: 15px;
    pointer-events: auto;
}

.hud-box {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    padding: 10px 20px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 90px;
}

.hud-box .label {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.hud-box span:not(.label) {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--text-light);
}

.hud-controls {
    display: flex;
    gap: 10px;
    pointer-events: auto;
}

.btn-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background 0.2s, transform 0.2s;
}

.btn-icon:active {
    transform: scale(0.9);
    background: rgba(255,255,255,0.2);
}

/* ==========================================================================
   Level Complete & Floating Text
   ========================================================================== */
.stats-row {
    display: flex;
    justify-content: space-between;
    font-size: 1.2rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.highlight {
    color: var(--primary-color);
    font-family: var(--font-heading);
}

.stars-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    height: 50px;
}

.star {
    width: 40px;
    height: 40px;
    background: var(--text-muted);
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
    transition: background 0.3s, transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform: scale(0);
}

.star.earned {
    background: #ffcc00; /* Gold */
    transform: scale(1);
}

/* Floating Points Feedback */
.floating-text {
    position: absolute;
    font-family: var(--font-heading);
    font-weight: 900;
    color: var(--primary-color);
    text-shadow: 0 0 10px var(--primary-glow);
    pointer-events: none;
    z-index: 20;
    animation: floatUpFade 1.2s ease-out forwards;
}

.floating-text.perfect {
    color: var(--secondary-color);
    text-shadow: 0 0 15px var(--secondary-glow);
    font-size: 2rem !important;
}

@keyframes floatUpFade {
    0% { transform: translateY(0) scale(0.5); opacity: 0; }
    20% { transform: translateY(-20px) scale(1.2); opacity: 1; }
    80% { transform: translateY(-60px) scale(1); opacity: 1; }
    100% { transform: translateY(-80px) scale(1); opacity: 0; }
}

/* ==========================================================================
   Responsive Queries
   ========================================================================== */
@media (max-width: 768px) {
    .game-title { font-size: 2rem; }
    .game-title span { font-size: 1.6rem; }
    .glass-panel { padding: 30px 20px; width: 90%; }
    .hud-box span:not(.label) { font-size: 1.2rem; }
    .hud-box { min-width: 70px; padding: 8px 15px; }
}

@media (max-width: 480px) {
    .menu-icon { width: 80px; height: 80px; }
    .btn-primary { font-size: 1rem; padding: 12px 30px; }
}