:root {
    --bg-color: #f4f0ea;
    --text-color: #111111;
    --border-color: #111111;
    --accent: #22d3ee;
    --wall-color: #111111;
    --heat: 0;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.container {
    text-align: center;
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.back-link {
    position: absolute;
    top: 2rem; left: 2rem;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 700;
    font-family: 'Space Mono', monospace;
    border: 2px solid var(--border-color);
    padding: 0.5rem 1rem;
    background: #fff;
    box-shadow: 4px 4px 0 var(--border-color);
    z-index: 100;
}

.header { margin-bottom: 2rem; }
.title { font-size: clamp(2.5rem, 6vw, 3.5rem); font-weight: 900; letter-spacing: -2px; }
.subtitle {
    font-size: 1.2rem;
    font-family: 'Space Mono', monospace;
    background: #fff;
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-color);
    display: inline-block;
    box-shadow: 4px 4px 0 var(--accent);
    transition: background-color 0.3s;
}

.controls-row {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1.5rem;
}

.diff-btns { display: flex; gap: 0.5rem; }

.small-btn {
    font-family: 'Space Mono', monospace;
    font-weight: bold;
    padding: 0.3rem 0.8rem;
    background: #fff;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s;
}
.small-btn.active {
    background: var(--text-color);
    color: #fff;
}
.small-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.hint-btn { background: #ffc900; }

.maze-container {
    position: relative;
    width: 600px;
    height: 500px; /* Updated height */
    background-color: #fff;
    border: 4px solid var(--border-color);
    cursor: crosshair;
    overflow: hidden;
    margin-bottom: 2rem;
    /* Heat glow effect */
    box-shadow: 
        0 0 calc(var(--heat) * 30px) rgba(255, 0, 0, var(--heat)) inset,
        8px 8px 0 var(--border-color);
    transition: background-color 0.3s, box-shadow 0.1s;
}

.maze-container.error {
    animation: shake 0.3s cubic-bezier(.36,.07,.19,.97) both;
    background-color: #fca5a5;
}

@keyframes shake {
    10%, 90% { transform: translate3d(-2px, 0, 0); }
    20%, 80% { transform: translate3d(4px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-8px, 0, 0); }
    40%, 60% { transform: translate3d(8px, 0, 0); }
}

.zone {
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 800;
    font-family: 'Space Mono', monospace;
    border: 2px dashed var(--border-color);
    transition: all 0.3s ease;
}

.start-zone { background-color: var(--accent); }
.checkpoint-zone { background-color: #fb923c; }
.end-zone { background-color: #a3e635; }

.wall {
    position: absolute;
    background-color: var(--wall-color);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.maze-container.revealed .wall, .maze-container.hinted .wall {
    opacity: 1;
}
.maze-container.hinted .wall {
    opacity: 0.4;
}

.maze-container.revealed {
    background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
    background-size: 20px 20px;
}

.win-message {
    position: absolute;
    background: #fff;
    border: 4px solid var(--border-color);
    padding: 3rem;
    box-shadow: 12px 12px 0 var(--border-color);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hidden { display: none !important; }
.mt-4 { margin-top: 2rem; }

.main-btn {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    padding: 1rem 2rem;
    background-color: var(--accent);
    color: var(--text-color);
    border: 4px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 4px 4px 0 var(--border-color);
    cursor: pointer;
}
.main-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--border-color);
}

/* Trail dot */
.trail-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    background: #ff90e8;
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 999;
    opacity: 0.6;
    transition: opacity 1s ease-out;
}