:root {
    --bg: #090a0f;
    --panel-bg: rgba(255, 255, 255, 0.03);
    --border: rgba(255, 255, 255, 0.1);
    --text: #e0e5ff;
    --text-dim: #8b92bf;
    --accent: #00f0ff;
    --accent-hover: #00c3cc;
    --target: #ff0055;
    --target-glow: rgba(255, 0, 85, 0.5);
    --block: rgba(0, 240, 255, 0.15);
    --block-border: rgba(0, 240, 255, 0.5);
    --exit: #00ff88;
    --grid-size: 60px;
    --gap: 4px;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    overflow: hidden;
    user-select: none;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.app-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 1200px;
    height: 90vh;
    background: radial-gradient(circle at top right, rgba(0, 240, 255, 0.05), transparent 50%),
                radial-gradient(circle at bottom left, rgba(255, 0, 85, 0.05), transparent 50%);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    backdrop-filter: blur(20px);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

h1 {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
}

.controls button {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-dim);
    padding: 8px 16px;
    border-radius: 20px;
    margin-left: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.controls button.active, .controls button:hover {
    background: var(--panel-bg);
    color: var(--text);
    border-color: var(--accent);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
}

main {
    display: flex;
    flex: 1;
    gap: 24px;
    min-height: 0;
}

.sidebar {
    width: 250px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.panel {
    display: none;
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    height: 100%;
    overflow-y: auto;
}

.panel.active {
    display: flex;
    flex-direction: column;
}

h2 { font-size: 1.25rem; font-weight: 600; margin-bottom: 16px; color: var(--accent); }
h3 { font-size: 1rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; }

.tool-group {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.tool-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-dim);
}

input[type="number"] {
    width: 60px;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px;
    border-radius: 8px;
    font-family: inherit;
    text-align: center;
}

button {
    background: var(--panel-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    transition: all 0.2s;
}

button:hover { background: rgba(255,255,255,0.1); }
button.danger:hover { background: rgba(255, 0, 85, 0.2); border-color: var(--target); }
button.target-btn { border-color: var(--target); color: var(--target); }
button.target-btn:hover { background: var(--target-glow); color: #fff; }

.dimension-controls, .piece-adder { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.piece-adder button { flex: 1; margin-top: 8px; }

.board-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(0,0,0,0.2);
    border-radius: 16px;
    border: 1px solid var(--border);
    position: relative;
    overflow: visible;
}

.board {
    position: relative;
    background: rgba(255,255,255,0.02);
    border: 2px solid rgba(255,255,255,0.05);
    border-radius: 12px;
}

.cell {
    position: absolute;
    width: var(--grid-size);
    height: var(--grid-size);
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.05);
}

.cell.border-cell {
    background: transparent;
    border: 1px dashed rgba(255,255,255,0.1);
    cursor: crosshair;
}

.block {
    position: absolute;
    border-radius: 8px;
    cursor: grab;
    transition: transform 0.15s cubic-bezier(0.2, 0.8, 0.2, 1);
    box-shadow: inset 0 0 20px rgba(255,255,255,0.05), 0 4px 10px rgba(0,0,0,0.3);
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(10px);
}

.block:active { cursor: grabbing; z-index: 100; transition: none; }

.block.normal {
    background: var(--block);
    border: 1px solid var(--block-border);
}

.block.target {
    background: rgba(255, 0, 85, 0.2);
    border: 2px solid var(--target);
    box-shadow: inset 0 0 20px var(--target-glow), 0 0 15px var(--target-glow);
}

.block.target::after {
    content: "★";
    font-size: 1.5rem;
    color: var(--target);
    text-shadow: 0 0 10px var(--target);
}

.exit-tile {
    position: absolute;
    background: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(0, 255, 136, 0.2) 10px, rgba(0, 255, 136, 0.2) 20px);
    border: 2px dashed var(--exit);
    border-radius: 8px;
    z-index: 0;
}

.counter {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent);
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
    margin-top: 8px;
}

.mt-4 { margin-top: 16px; width: 100%; }
.glow-btn {
    width: 100%;
    background: linear-gradient(90deg, #00f0ff, #0077ff);
    color: #000;
    border: none;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.glow-btn:hover {
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
    transform: translateY(-2px);
}

.hidden { display: none !important; }
.status-msg { margin-top: 10px; font-size: 0.9rem; color: var(--accent); text-align: center; }

/* In edit mode, clicking blocks removes them */
.edit-mode .block:hover { border-color: var(--target); background: rgba(255,0,85,0.1); }
.edit-mode .block { cursor: crosshair; }

.level-btn {
    width: 100%;
    text-align: left;
    margin-bottom: 8px;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border);
}
.level-btn:hover { border-color: var(--accent); }

/* Level Tabs */
.level-tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    color: var(--text-dim);
    padding: 10px;
    margin: 0;
}

.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    background: rgba(0, 240, 255, 0.05);
}

.tab-btn:hover:not(.active) {
    background: rgba(255,255,255,0.05);
}