:root {
    --bg: #050a10;
    --surface: rgba(15, 23, 42, 0.8);
    --text: #f8fafc;
    --heart: #ef4444;
    --primary: #00f0ff;
}

* { margin: 0; padding: 0; box-sizing: border-box; user-select: none; -webkit-tap-highlight-color: transparent; }

body { 
    background-color: #020617; 
    font-family: 'Inter', system-ui, sans-serif; 
    color: var(--text); 
    overflow: hidden; 
    touch-action: none;
}

#app-container { 
    width: 100vw; 
    height: 100vh; 
    position: relative; 
    background: radial-gradient(circle at center, #0f172a 0%, #020617 100%);
    max-width: 600px; 
    margin: 0 auto; 
    box-shadow: 0 0 50px rgba(0,240,255,0.05); 
}

.screen { 
    position: absolute; 
    inset: 0; 
    display: flex; 
    flex-direction: column; 
    opacity: 0; 
    visibility: hidden; 
    transition: opacity 0.3s; 
}

.screen.active { 
    opacity: 1; 
    visibility: visible; 
}

#screen-home { 
    align-items: center; 
    justify-content: center; 
}

.logo { 
    text-align: center; 
    margin-bottom: 4rem; 
}

.neon-icon {
    font-size: 6rem;
    color: var(--primary);
    text-shadow: 0 0 20px rgba(0,240,255,0.5);
}

.neon-text {
    font-size: 2.8rem; 
    margin: 1rem 0 0.5rem; 
    font-weight: 900;
    color: #fff;
    text-shadow: 0 0 10px var(--primary), 0 0 20px var(--primary);
    letter-spacing: 2px;
}

.logo p { 
    color: #94a3b8; 
    font-size: 1.1rem;
    letter-spacing: 1px;
}

.btn-primary { 
    background: transparent; 
    color: var(--primary); 
    border: 2px solid var(--primary); 
    padding: 1.2rem 3rem; 
    border-radius: 30px; 
    font-size: 1.2rem; 
    font-weight: bold; 
    cursor: pointer; 
    transition: all 0.2s; 
    width: 80%;
    max-width: 300px;
    letter-spacing: 2px;
}

.cyber-glow {
    box-shadow: 0 0 15px rgba(0,240,255,0.2), inset 0 0 15px rgba(0,240,255,0.1);
}

.btn-primary:active { transform: scale(0.95); background: rgba(0,240,255,0.1); }

.btn-secondary { 
    background: rgba(255,255,255,0.1); 
    color: var(--text); 
    border: 1px solid rgba(255,255,255,0.2); 
    padding: 1.2rem 3rem; 
    border-radius: 30px; 
    font-size: 1.2rem; 
    font-weight: bold; 
    cursor: pointer; 
    transition: transform 0.2s; 
    margin-top: 1rem; 
    width: 80%;
    max-width: 300px;
}
.btn-secondary:active { transform: scale(0.95); }
.btn-secondary.hidden { display: none; }

.header { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    padding: 1.5rem 1.5rem 0.5rem; 
    z-index: 10;
}

#level-title {
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: 2px;
    text-shadow: 0 0 10px rgba(255,255,255,0.3);
}

.icon-btn { 
    background: rgba(255,255,255,0.05); 
    border: 1px solid rgba(255,255,255,0.1); 
    border-radius: 50%;
    color: var(--text); 
    cursor: pointer; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    padding: 0.6rem; 
    transition: background 0.2s;
}
.icon-btn:active { background: rgba(255,255,255,0.2); }

.status-bar { 
    display: flex; 
    justify-content: center; 
    padding: 0.5rem; 
    z-index: 10;
}

#hearts-container { 
    display: flex; 
    gap: 0.5rem; 
    color: var(--heart); 
    font-size: 1.5rem; 
    text-shadow: 0 0 15px rgba(239, 68, 68, 0.6);
}

.canvas-wrapper { 
    flex: 1; 
    position: relative; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    overflow: hidden; 
}

canvas { 
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    touch-action: none;
}

.zoom-controls {
    position: absolute;
    right: 1rem;
    bottom: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 10;
}

.glass-btn {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.1);
    color: white;
    border-radius: 12px;
    padding: 0.6rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}
.glass-btn:active { background: rgba(255,255,255,0.1); }

.bottom-bar {
    padding: 1.5rem;
    display: flex;
    justify-content: center;
    z-index: 10;
}

.hint-badge {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    color: #94a3b8;
    padding: 0.8rem 1.5rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.modal-overlay { 
    position: absolute; 
    inset: 0; 
    background: rgba(2,6,23,0.8); 
    backdrop-filter: blur(8px); 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    z-index: 100; 
    opacity: 1; 
    transition: opacity 0.3s; 
}

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

.modal { 
    background: var(--surface); 
    border: 1px solid rgba(0,240,255,0.2);
    padding: 3rem 2rem; 
    border-radius: 24px; 
    box-shadow: 0 20px 50px rgba(0,0,0,0.5), inset 0 0 20px rgba(0,240,255,0.05); 
    text-align: center; 
    display: flex; 
    flex-direction: column; 
    align-items: center;
    gap: 1.5rem; 
    width: 85%; 
}