:root {
    --bg-color: #0f0c1b;
    --bg-gradient: linear-gradient(135deg, #1a0b2e 0%, #0d1b2a 100%);
    --grid-line: rgba(100, 200, 255, 0.2);
    --cell-empty: rgba(20, 20, 40, 0.6);
    --attr-glacio: #99ffff;
    --attr-fusion: #ff4d4d;
    --attr-electro: #cc66ff;
    --attr-aero: #66ff99;
    --attr-spectro: #ffd700;
    --attr-havoc: #ff3399;
    --accent-color: #00ffff;
    --danger-color: #ff0055;
    --text-color: #e0e0e0;
    --font-mono: 'Courier New', Courier, monospace;
    --cell-size: 54px;
    --grid-gap: 2px;
    --board-size: 8;
}

.game-terminal * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

.game-terminal {
    background: var(--bg-gradient);
    color: var(--text-color);
    font-family: var(--font-mono);
    min-height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image:
        linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%),
        linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
    background-size: 100% 4px, 6px 100%;
}

.game-terminal .terminal-container {
    background: rgba(10, 10, 20, 0.8);
    border: 1px solid rgba(0, 255, 255, 0.3);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.1), inset 0 0 10px rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    padding: 25px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
    border-radius: 8px;
}

.game-terminal .help-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 1.5px solid rgba(0, 255, 255, 0.35);
    background: rgba(0, 0, 0, 0.5);
    color: var(--accent-color);
    font-family: var(--font-mono);
    font-size: 15px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    transition: all 0.25s;
    padding: 0;
    line-height: 1;
}

.game-terminal .help-btn:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 12px rgba(0, 255, 255, 0.4);
    background: rgba(0, 255, 255, 0.12);
}

.game-terminal .header {
    display: flex;
    flex-direction: column;
    gap: 15px;
    border-bottom: 1px solid var(--grid-line);
    padding-bottom: 15px;
}

.game-terminal .difficulty-selector {
    display: flex;
    gap: 6px;
    justify-content: center;
}

.game-terminal .diff-btn {
    background: transparent;
    color: rgba(255,255,255,0.4);
    border: 1px solid rgba(255,255,255,0.15);
    padding: 3px 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1px;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.2s;
}

.game-terminal .diff-btn:hover {
    color: var(--accent-color);
    border-color: rgba(0, 255, 255, 0.4);
}

.game-terminal .diff-btn.active {
    color: var(--accent-color);
    border-color: var(--accent-color);
    text-shadow: 0 0 5px var(--accent-color);
    background: rgba(0, 255, 255, 0.1);
}

.game-terminal .header-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding-right: 40px;
}

.game-terminal .title-glitch {
    color: var(--accent-color);
    font-weight: bold;
    letter-spacing: 3px;
    font-size: 20px;
    text-shadow: 0 0 5px var(--accent-color);
}

.game-terminal .score-board {
    display: flex;
    gap: 30px;
    text-align: right;
}

.game-terminal .score-item {
    display: flex;
    flex-direction: column;
}

.game-terminal .score-label {
    font-size: 10px;
    color: rgba(255,255,255,0.5);
    letter-spacing: 1px;
}

.game-terminal .score-value {
    font-size: 28px;
    color: #fff;
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

.game-terminal .attr-stats {
    display: flex;
    justify-content: space-between;
    background: rgba(0,0,0,0.4);
    padding: 10px;
    border-radius: 4px;
    border: 1px solid rgba(255,255,255,0.1);
}

.game-terminal .attr-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 14px;
}

.game-terminal .attr-dot {
    width: 10px; height: 10px; border-radius: 50%;
}

.game-terminal .attr-glacio-color { color: var(--attr-glacio); text-shadow: 0 0 5px var(--attr-glacio); }
.game-terminal .attr-glacio-bg { background-color: var(--attr-glacio); box-shadow: 0 0 8px var(--attr-glacio); }
.game-terminal .attr-fusion-color { color: var(--attr-fusion); text-shadow: 0 0 5px var(--attr-fusion); }
.game-terminal .attr-fusion-bg { background-color: var(--attr-fusion); box-shadow: 0 0 8px var(--attr-fusion); }
.game-terminal .attr-electro-color { color: var(--attr-electro); text-shadow: 0 0 5px var(--attr-electro); }
.game-terminal .attr-electro-bg { background-color: var(--attr-electro); box-shadow: 0 0 8px var(--attr-electro); }
.game-terminal .attr-aero-color { color: var(--attr-aero); text-shadow: 0 0 5px var(--attr-aero); }
.game-terminal .attr-aero-bg { background-color: var(--attr-aero); box-shadow: 0 0 8px var(--attr-aero); }
.game-terminal .attr-spectro-color { color: var(--attr-spectro); text-shadow: 0 0 5px var(--attr-spectro); }
.game-terminal .attr-spectro-bg { background-color: var(--attr-spectro); box-shadow: 0 0 8px var(--attr-spectro); }
.game-terminal .attr-havoc-color { color: var(--attr-havoc); text-shadow: 0 0 5px var(--attr-havoc); }
.game-terminal .attr-havoc-bg { background-color: var(--attr-havoc); box-shadow: 0 0 8px var(--attr-havoc); }

.game-terminal .game-area {
    display: flex;
    gap: 30px;
}

.game-terminal .board-container {
    position: relative;
    padding: 10px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.05);
}

.game-terminal .board {
    display: grid;
    grid-template-columns: repeat(var(--board-size), var(--cell-size));
    grid-template-rows: repeat(var(--board-size), var(--cell-size));
    gap: var(--grid-gap);
    background-color: var(--grid-line);
    border: 1px solid var(--grid-line);
}

.game-terminal .cell {
    width: var(--cell-size);
    height: var(--cell-size);
    background-color: var(--cell-empty);
    transition: all 0.1s;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: calc(var(--cell-size) * 0.45);
    color: rgba(0,0,0,0.5);
}

.game-terminal .cell.filled.attr-glacio { background-color: var(--attr-glacio); box-shadow: inset 0 0 10px rgba(255,255,255,0.5); }
.game-terminal .cell.filled.attr-fusion { background-color: var(--attr-fusion); box-shadow: inset 0 0 10px rgba(255,255,255,0.5); }
.game-terminal .cell.filled.attr-electro { background-color: var(--attr-electro); box-shadow: inset 0 0 10px rgba(255,255,255,0.5); }
.game-terminal .cell.filled.attr-aero { background-color: var(--attr-aero); box-shadow: inset 0 0 10px rgba(255,255,255,0.5); }
.game-terminal .cell.filled.attr-spectro { background-color: var(--attr-spectro); box-shadow: inset 0 0 10px rgba(255,255,255,0.5); }
.game-terminal .cell.filled.attr-havoc { background-color: var(--attr-havoc); box-shadow: inset 0 0 10px rgba(255,255,255,0.5); }

.game-terminal .cell.hover {
    background-color: rgba(255, 255, 255, 0.2);
    box-shadow: inset 0 0 0 2px var(--accent-color);
}

.game-terminal .cell.invalid {
    background-color: rgba(255, 0, 85, 0.3);
    box-shadow: inset 0 0 0 2px var(--danger-color);
}

.game-terminal .tray-container {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: auto;
    min-width: 150px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.05);
    padding: 10px;
    gap: 15px;
}

.game-terminal .tray-slot {
    height: 130px;
    background: rgba(20, 20, 30, 0.5);
    border-radius: 4px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    border: 1px dashed rgba(255,255,255,0.1);
}

.game-terminal .shape-element,
.shape-element {
    display: grid;
    gap: var(--grid-gap);
    cursor: grab;
    position: absolute;
    z-index: 9999;
}

.game-terminal .shape-element:active,
.shape-element:active {
    cursor: grabbing;
}

.game-terminal .shape-element.dragging,
.shape-element.dragging {
    pointer-events: none;
    opacity: 0.9;
    transform: scale(1.05);
    filter: drop-shadow(0 0 10px rgba(255,255,255,0.3));
}

.game-terminal .shape-cell,
.shape-cell {
    width: var(--cell-size);
    height: var(--cell-size);
    background-color: #fff;
    border-radius: 2px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: calc(var(--cell-size) * 0.45);
    color: rgba(0,0,0,0.6);
    font-weight: bold;
}

.game-terminal .shape-cell.empty,
.shape-cell.empty {
    background-color: transparent !important;
    box-shadow: none !important;
    color: transparent;
}

.game-terminal .leaderboard-container {
    width: 180px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.05);
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 12px;
}

.game-terminal .leaderboard-title {
    color: var(--accent-color);
    text-align: center;
    font-weight: bold;
    letter-spacing: 2px;
    border-bottom: 1px dashed rgba(255,255,255,0.2);
    padding-bottom: 5px;
    margin-bottom: 5px;
}

.game-terminal .leaderboard-list {
    list-style: none;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
}

.game-terminal .leaderboard-item {
    display: flex;
    justify-content: space-between;
    background: rgba(255,255,255,0.05);
    padding: 5px;
    border-radius: 3px;
    border-left: 2px solid var(--accent-color);
}

.game-terminal .leaderboard-item .rank-score {
    color: #fff;
    font-weight: bold;
}

.game-terminal .leaderboard-item .date {
    color: rgba(255,255,255,0.4);
    font-size: 10px;
}

.game-terminal .leaderboard-actions {
    display: flex;
    gap: 5px;
    margin-top: auto;
}

.game-terminal .action-btn {
    flex: 1;
    background: transparent;
    color: var(--text-color);
    border: 1px solid rgba(255,255,255,0.2);
    padding: 5px;
    font-family: var(--font-mono);
    font-size: 10px;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.2s;
}

.game-terminal .action-btn:hover {
    background: rgba(0, 255, 255, 0.2);
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.game-terminal .toast-container {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(10, 20, 30, 0.9);
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 10px 20px;
    border-radius: 4px;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.2);
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.game-terminal .toast-container.show {
    opacity: 1;
}

.game-terminal .custom-modal {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.8); backdrop-filter: blur(5px);
    display: flex; justify-content: center; align-items: center;
    z-index: 200; display: none;
}

.game-terminal .game-modal-content {
    background: rgba(15, 12, 27, 0.95); border: 1px solid var(--accent-color);
    padding: 20px; border-radius: 8px; width: 400px;
    display: flex; flex-direction: column; gap: 15px;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.1);
}

.game-terminal .game-modal-content textarea {
    width: 100%; height: 100px; background: rgba(0,0,0,0.5);
    border: 1px solid rgba(255,255,255,0.2); color: #fff;
    padding: 10px; font-family: var(--font-mono); resize: none; border-radius: 4px;
}

.game-terminal .game-modal-content textarea:focus { outline: none; border-color: var(--accent-color); }
.game-terminal .modal-btns { display: flex; justify-content: flex-end; gap: 10px; }
.game-terminal .danger-btn:hover { background: rgba(255, 0, 85, 0.2) !important; color: var(--danger-color) !important; border-color: var(--danger-color) !important; }

.game-terminal .game-over-overlay {
    position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(10, 5, 20, 0.9); display: flex; flex-direction: column;
    justify-content: center; align-items: center; z-index: 100;
    display: none; backdrop-filter: blur(4px); border-radius: 8px;
}

.game-terminal .game-over-text {
    color: var(--danger-color); font-size: 36px; font-weight: bold;
    margin-bottom: 10px; letter-spacing: 5px; text-shadow: 0 0 10px var(--danger-color);
}

.game-terminal .restart-btn {
    background: transparent; color: var(--accent-color); border: 1px solid var(--accent-color);
    padding: 12px 30px; font-family: var(--font-mono); font-size: 16px;
    cursor: pointer; text-transform: uppercase; transition: all 0.2s;
    letter-spacing: 2px; margin-top: 20px;
}

.game-terminal .restart-btn:hover { background: rgba(0, 255, 255, 0.2); box-shadow: 0 0 15px rgba(0, 255, 255, 0.4); }

.game-terminal .clearing { animation: cyber-flash 0.3s forwards; }
@keyframes cyber-flash {
    0% { filter: brightness(1); transform: scale(1); }
    50% { filter: brightness(2) contrast(2); background-color: #fff; transform: scale(0.8) rotate(5deg); }
    100% { background-color: var(--cell-empty); box-shadow: none; transform: scale(1); }
}

.game-terminal .footer-credits {
    position: absolute; bottom: 5px; left: 0; width: 100%;
    text-align: center; font-size: 10px; color: rgba(255, 255, 255, 0.3);
    letter-spacing: 1px; pointer-events: auto;
}

.game-terminal .footer-credits a { color: rgba(0, 255, 255, 0.5); text-decoration: none; transition: color 0.2s; }
.game-terminal .footer-credits a:hover { color: var(--accent-color); text-decoration: underline; }

.game-terminal .attr-icon,
.attr-icon {
    width: calc(var(--cell-size) * 0.6);
    height: calc(var(--cell-size) * 0.6);
    display: block;
    pointer-events: none;
}

.game-terminal .cell .attr-icon,
.cell .attr-icon {
    margin: auto;
}

.game-terminal .demo-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    display: none;
    z-index: 200;
    border-radius: 8px;
    background: transparent;
    pointer-events: none;
}

.game-terminal .demo-overlay.show {
    display: block;
}

.game-terminal .demo-panel {
    pointer-events: auto;
    position: absolute;
    left: 50%;
    top: 56px;
    transform: translateX(-50%);
    width: 88%;
    max-width: 420px;
    background: rgba(10, 10, 28, 0.94);
    border: 1px solid rgba(0, 255, 255, 0.25);
    border-radius: 8px;
    padding: 12px 16px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    z-index: 3;
}

.game-terminal .demo-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.game-terminal .demo-nav-btn {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text-color);
    width: 28px; height: 28px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-family: var(--font-mono);
    transition: all 0.2s;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
.game-terminal .demo-nav-btn:hover { border-color: var(--accent-color); color: var(--accent-color); }
.game-terminal .demo-nav-btn:disabled { opacity: 0.25; cursor: default; border-color: rgba(255,255,255,0.08); color: rgba(255,255,255,0.2); }

.game-terminal .demo-mid {
    flex: 1;
    text-align: center;
    min-width: 0;
}

.game-terminal .demo-title {
    color: var(--accent-color);
    font-size: 14px;
    letter-spacing: 1.5px;
    margin-bottom: 4px;
}

.game-terminal .demo-dots {
    display: flex;
    gap: 5px;
    justify-content: center;
}

.game-terminal .demo-dot {
    width: 5px; height: 5px;
    border-radius: 50%;
    background: rgba(255,255,255,0.12);
    cursor: pointer;
    transition: all 0.25s;
}
.game-terminal .demo-dot.active { background: var(--accent-color); box-shadow: 0 0 5px var(--accent-color); }
.game-terminal .demo-dot:hover { background: rgba(0, 255, 255, 0.35); }

.game-terminal .demo-overlay-close {
    background: transparent;
    border: none;
    color: rgba(255,255,255,0.4);
    font-size: 18px;
    cursor: pointer;
    transition: color 0.2s;
    line-height: 1;
    padding: 2px;
    flex-shrink: 0;
}
.game-terminal .demo-overlay-close:hover { color: var(--accent-color); }

.game-terminal .demo-desc {
    color: rgba(255,255,255,0.6);
    font-size: 11px;
    text-align: center;
    margin: 8px 0 10px;
    line-height: 1.5;
}

.game-terminal .demo-play-btn {
    display: block;
    margin: 0 auto;
    background: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 6px 32px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 2px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}
.game-terminal .demo-play-btn:hover {
    background: rgba(0, 255, 255, 0.1);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.2);
}
.game-terminal .demo-play-btn:disabled {
    opacity: 0.25;
    cursor: default;
    border-color: rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.3);
}

.game-terminal .demo-ghost,
.demo-ghost {
    filter: drop-shadow(0 0 10px rgba(0, 255, 255, 0.5));
    opacity: 0.95;
    z-index: 9999;
    pointer-events: none;
}

.portrait-warning {
    display: none;
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(10, 5, 20, 0.95); z-index: 9999;
    flex-direction: column; justify-content: center; align-items: center;
    color: var(--accent-color); font-family: var(--font-mono); text-align: center;
    backdrop-filter: blur(10px);
}

.portrait-warning .icon {
    font-size: 60px; margin-bottom: 20px;
    animation: rotatePhone 1.5s infinite ease-in-out alternate;
}

@keyframes rotatePhone {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(-90deg); }
}

@media screen and (max-width: 768px) and (orientation: portrait) {
    .portrait-warning { display: flex; }
    .game-terminal .terminal-container { display: none !important; }
}

@media screen and (max-height: 600px), screen and (max-width: 900px) {
    .game-terminal .terminal-container { padding: 10px; gap: 10px; }
    .game-terminal .header { padding-bottom: 5px; gap: 5px; }
    .game-terminal .title-glitch { font-size: 14px; }
    .game-terminal .score-value { font-size: 20px; }
    .game-terminal .score-board { gap: 15px; }
    .game-terminal .attr-stats { padding: 5px; font-size: 12px; }
    .game-terminal .attr-dot { width: 8px; height: 8px; }
    .game-terminal .game-area { gap: 10px; }
    .game-terminal .leaderboard-container { width: 140px; padding: 5px; font-size: 10px; gap: 5px; }
    .game-terminal .leaderboard-title { margin-bottom: 2px; }
    .game-terminal .tray-container { min-width: 100px; padding: 5px; gap: 5px; }
    .game-terminal .footer-credits { font-size: 8px; bottom: 2px; }
    .game-terminal .action-btn { padding: 3px; font-size: 9px; }
}

@media screen and (max-height: 400px) {
    .game-terminal .terminal-container { flex-direction: row; flex-wrap: wrap; justify-content: center;}
    .game-terminal .header { width: 100%; flex-direction: row; justify-content: space-between; align-items: center; border-bottom: none; padding-bottom: 0;}
    .game-terminal .header-top { gap: 20px; }
    .game-terminal .attr-stats { gap: 5px; padding: 2px 5px;}
    .game-terminal .leaderboard-container { display: none; }
}