* { box-sizing: border-box; margin: 0; padding: 0; }
body { 
    font-family: 'Courier New', monospace; 
    background: #0a0a12; 
    color: #e0d0ff; 
    padding: 20px; 
    overscroll-behavior: none;
    -webkit-user-select: none;
    user-select: none;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}
#starfield {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: -1;
    background: #0a0a12;
    overflow: hidden;
}
.comet {
    position: fixed;
    width: 8px;
    height: 8px;
    background: radial-gradient(circle, #fff 0%, #fad 40%, #f8a 70%, transparent 100%);
    border-radius: 50%;
    box-shadow: 0 0 10px #fff, 0 0 20px #fac, 0 0 30px #f8a;
    z-index: 1000;
    pointer-events: none;
}
.comet::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120px;
    height: 6px;
    background: linear-gradient(90deg, rgba(255,180,200,0.8), rgba(200,150,255,0.4) 30%, transparent);
    transform: translateY(-50%) rotate(calc(var(--tail-rotation) + 180deg));
    transform-origin: left center;
    filter: blur(1px);
}
#storage-consent {
    background: rgba(30,20,50,0.9);
    padding: 15px;
    border-radius: 4px;
    border: 1px solid #a080ff;
    box-shadow: 0 0 10px rgba(160,100,255,0.3), inset 0 0 20px rgba(100,60,180,0.1);
    margin-bottom: 15px;
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}
#storage-consent.hidden { display: none; }
#storage-consent button { padding: 8px 16px; cursor: pointer; border: 1px solid; font-family: inherit; }
#accept-storage { background: rgba(40,80,60,0.8); color: #8fd8a0; border-color: #8fd8a0; }
#decline-storage { background: rgba(40,40,60,0.8); color: #888; border-color: #666; }
#game { 
    max-width: 1000px; 
    margin: 0 auto;
    background: linear-gradient(180deg, rgba(20,15,35,0.95) 0%, rgba(10,10,25,0.98) 100%);
    border: 2px solid;
    border-image: linear-gradient(135deg, #a060ff, #60a0ff, #ff60a0) 1;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 0 30px rgba(140,80,255,0.2), inset 0 0 50px rgba(80,40,120,0.1);
    position: relative;
}
#game::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, #a080ff, #ff80a0, #80a0ff, transparent);
    animation: scanline 3s linear infinite;
}
@keyframes scanline {
    0% { opacity: 0.3; }
    50% { opacity: 0.8; }
    100% { opacity: 0.3; }
}
h1 { 
    margin-bottom: 10px; 
    text-transform: uppercase;
    letter-spacing: 4px;
    background: linear-gradient(90deg, #a080ff, #ff80c0, #80c0ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 8px rgba(160,100,255,0.5));
}
h2 { 
    margin-bottom: 10px;
    color: #b090ff;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 14px;
}
#puzzles { margin-bottom: 20px; }
#pieces {
    position: sticky;
    top: 0;
    z-index: 100;
    background: linear-gradient(180deg, rgba(20,30,40,0.98) 0%, rgba(15,22,30,0.99) 100%);
    padding: 0;
    border-bottom: 2px solid transparent;
    background-clip: padding-box;
    box-shadow: 0 5px 20px rgba(60,140,180,0.2);
    margin-bottom: 15px;
    max-height: 35vh;
    display: flex;
    flex-direction: column;
}
#pieces::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, #40a0c0, #a060ff, #ff60a0, #60c0c0, #a0c060);
}
#pieces-header {
    position: sticky;
    top: 0;
    background: linear-gradient(180deg, rgba(25,20,45,1) 0%, rgba(15,12,30,1) 100%);
    padding: 10px 15px;
    z-index: 10;
    border-bottom: 1px solid #604090;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
#ppt-display {
    color: #60e0e0;
    font-size: 14px;
    font-weight: bold;
    white-space: nowrap;
}
#piece-supply {
    padding: 10px 15px;
    overflow-y: auto;
    flex: 1;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-content: flex-start;
}
#puzzle-row { display: flex; gap: 15px; flex-wrap: wrap; }
.puzzle-row { 
    display: flex; 
    gap: 15px; 
    margin-bottom: 15px; 
    min-height: auto; 
    align-items: flex-start;
    flex-wrap: wrap;
}
.puzzle-row .puzzle { 
    border-radius: 6px; 
}
.puzzle-row .puzzle::after { display: none; }
#pieces h2 { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 0; }
#pieces h2 button { 
    padding: 6px 12px; 
    cursor: pointer; 
    font-family: inherit;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 1px;
    border: 1px solid;
    transition: all 0.2s;
}
#pieces h2 button:hover { box-shadow: 0 0 10px currentColor; }
#reset-game { background: rgba(80,20,40,0.8); color: #ff6080; border-color: #ff6080; }
#return-btn { background: rgba(40,30,80,0.8); color: #a0a0ff; border-color: #a0a0ff; }
#return-btn.hidden { display: none; }
#undo-btn { background: rgba(30,60,50,0.8); color: #80d0a0; border-color: #80d0a0; }
#undo-btn:disabled { background: rgba(30,30,30,0.8); color: #444; border-color: #444; cursor: not-allowed; }
#sacrifice-btn { background: rgba(80,50,30,0.8); color: #ffa060; border-color: #ffa060; }
#sacrifice-btn.hidden { display: none; }
#sacrifice-btn:disabled { background: rgba(40,40,40,0.8); color: #555; border-color: #555; cursor: not-allowed; }
#piece-warning { color: #ffa060; font-size: 12px; }
#piece-warning.hidden { display: none; }
#piece-warning.at-limit { color: #ff6080; }
#advanced-toggle.advanced-off { background: rgba(40,40,50,0.8); color: #666; border: 1px solid #666; }
#advanced-toggle.advanced-on { background: rgba(80,50,30,0.8); color: #ffa060; border: 1px solid #ffa060; }
#take-dot { font-size: 11px; touch-action: manipulation; background: rgba(30,50,60,0.8); color: #60d0d0; border-color: #60d0d0; }
#score { 
    font-size: 14px; 
    line-height: 1.8;
    padding: 10px;
    background: rgba(15,25,35,0.6);
    border: 1px solid transparent;
    border-radius: 4px;
    margin-top: 10px;
    position: relative;
}
#score::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 5px;
    padding: 1px;
    background: linear-gradient(90deg, #40a0c0, #a060ff, #ff60a0);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}
#score span { font-weight: bold; color: #60e0e0; }

.puzzle {
    background: linear-gradient(135deg, rgba(30,35,60,0.9) 0%, rgba(20,30,45,0.95) 100%);
    padding: 10px;
    border-radius: 6px;
    border: 2px solid;
    border-image: linear-gradient(135deg, #40a0c0, #a060ff, #ff60a0) 1;
    box-shadow: 0 0 15px rgba(80,120,180,0.2), inset 0 0 20px rgba(60,100,140,0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 220px;
    min-height: 280px;
    position: relative;
}
.timer-container { margin-top: 5px; }
.timer { display: block; margin: 0 auto; }

.reward-section { margin-top: 8px; min-height: 30px; display: flex; align-items: center; justify-content: center; }
.reward-preview { background: transparent; padding: 2px; cursor: default; pointer-events: none; }
.reward-preview .piece-grid .cell.filled { 
    background: linear-gradient(135deg, rgba(255,200,255,0.6) 0%, rgba(200,150,255,0.3) 50%, rgba(255,200,220,0.5) 100%);
    box-shadow: 0 0 10px rgba(255,180,255,0.6), inset 0 1px 2px rgba(255,255,255,0.5);
    border: 1px solid rgba(255,200,255,0.6);
    border-radius: 2px;
}
.points-reward { font-size: 14px; font-weight: bold; color: #80e0e0; text-shadow: 0 0 5px #80e0e0; }
.puzzle-grid {
    display: grid;
    gap: 2px;
    background: #1a1525;
    padding: 2px;
    width: fit-content;
    border: 1px solid #403060;
}
.puzzle-grid .cell {
    width: 30px;
    height: 30px;
    background: #2a2040;
    min-width: 30px;
    min-height: 30px;
    transition: background 0.15s;
}
@media (max-width: 600px) {
    #game { padding: 10px; }
    .puzzle { width: 140px; min-height: 200px; padding: 6px; }
    .puzzle-grid .cell { width: 20px; height: 20px; min-width: 20px; min-height: 20px; }
    .puzzle-grid { gap: 1px; padding: 1px; }
    .piece-grid .cell { width: 16px; height: 16px; }
    .puzzle-row { flex-wrap: wrap; height: auto; min-height: auto; gap: 8px; justify-content: center; }
    body { padding: 8px; }
    h1 { font-size: 1.3em; }
    h2 { font-size: 1em; }
    #score { font-size: 12px; }
    .timer { transform: scale(0.8); }
    #pieces { max-height: 30vh; }
    #pieces-header { padding: 8px 10px; }
    #pieces h2 { font-size: 11px; margin-bottom: 0; }
    #piece-supply { gap: 6px; padding: 8px 10px; }
    .piece { padding: 3px; }
}
.puzzle-grid .cell.empty { background: #15101f; }
.puzzle-grid .cell.required { 
    background: #15101f;
    box-shadow: inset 0 0 0 2px rgba(200,100,255,0.5);
}
.puzzle-grid .cell.filled { background: #40d0d0; box-shadow: 0 0 8px rgba(64,208,208,0.6); }
.puzzle-grid .cell.selected-placed { outline: 2px solid #80ffff; outline-offset: -2px; }
.puzzle-grid .cell.solid { background: #2a2040; }
.puzzle-grid .cell.preview { background: rgba(64,208,208,0.4); }
.puzzle-grid .cell.preview-invalid { background: rgba(255,60,80,0.3); }

.piece {
    background: linear-gradient(135deg, rgba(30,50,60,0.9) 0%, rgba(20,35,45,0.95) 100%);
    padding: 5px;
    border-radius: 4px;
    border: 1px solid #408080;
    cursor: grab;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
    position: relative;
    transition: all 0.2s;
}
.piece:hover { border-color: #60b0b0; box-shadow: 0 0 10px rgba(64,180,180,0.3); }
.piece.selected {
    outline: 2px solid #60e0e0;
    background: linear-gradient(135deg, rgba(40,70,80,0.9) 0%, rgba(30,50,60,0.95) 100%);
    box-shadow: 0 0 15px rgba(80,220,220,0.4);
}
.piece.sacrifice-selected {
    outline: 2px solid #ffa060;
    background: linear-gradient(135deg, rgba(90,55,40,0.9) 0%, rgba(60,35,25,0.95) 100%);
    box-shadow: 0 0 15px rgba(255,160,96,0.4);
}
.piece:active { cursor: grabbing; }
.piece.dragging { opacity: 0.5; }
.expiry-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    background: #403060;
    color: #c0b0e0;
    font-size: 10px;
    padding: 1px 4px;
    border-radius: 2px;
    border: 1px solid #604080;
}
.expiry-badge.expiry-low { background: #602040; color: #ff8090; border-color: #803050; }
.piece-grid {
    display: grid;
    gap: 1px;
}
.piece-grid .cell {
    width: 20px;
    height: 20px;
    background: transparent;
}
.piece-grid .cell.filled { background: #40d0d0; box-shadow: 0 0 4px rgba(64,208,208,0.5); }

.puzzle.drag-over { outline: 2px solid #60e0e0; box-shadow: 0 0 20px rgba(80,220,220,0.4); }


#toggle-history { 
    margin-top: 15px; 
    padding: 5px 10px; 
    cursor: pointer;
    background: rgba(35,25,60,0.8);
    color: #9080c0;
    border: 1px solid #604080;
    font-family: inherit;
    text-transform: uppercase;
    font-size: 11px;
}
#puzzle-history { 
    margin-top: 15px; 
    padding: 10px; 
    background: rgba(25,20,45,0.9); 
    border: 1px solid #604080;
    border-radius: 4px; 
    max-height: 300px; 
    overflow-y: auto; 
}
#puzzle-history.hidden { display: none; }
#puzzle-history h3 { margin: 0 0 10px 0; color: #b090ff; }
#history-list { display: flex; flex-wrap: wrap; gap: 10px; }
.history-item { 
    background: rgba(35,25,60,0.8); 
    padding: 8px; 
    border-radius: 4px; 
    font-size: 12px;
    border: 1px solid #403060;
}
.history-item.solved { border-left: 3px solid #80d0a0; }
.history-item.expired { border-left: 3px solid #ff6080; opacity: 0.7; }
.history-item.active { border-left: 3px solid #ffa060; }
.history-item code { font-family: monospace; line-height: 1.1; display: block; margin-top: 5px; color: #9080c0; }