body {
    background-color: #1e1e24;
    color: white;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding-bottom: 30px; 
    user-select: none;
    overflow-x: hidden;
    touch-action: manipulation; 
    -webkit-tap-highlight-color: transparent; 
}

.game-container {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 40px;
    padding: 30px;
    background: #2b2b36;
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.6);
    margin-top: 40px;
    border: 1px solid #3d3d4a;
    position: relative;
    z-index: 10;
}

.game-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 380px;
}

h1 { margin: 0 0 5px 0; font-size: 2.8rem; letter-spacing: 2px; color: #fff; text-shadow: 0 2px 4px rgba(0,0,0,0.5); }

.scoreboard {
    font-size: 1.1rem;
    font-weight: bold;
    background: #1e1e24;
    padding: 8px 20px;
    border-radius: 20px;
    margin-bottom: 5px;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.5);
    border: 1px solid #444;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.score-title { font-size: 0.8rem; color: #888; text-transform: uppercase; margin-bottom: 4px; letter-spacing: 1px;}
.score-red { color: #ff4757; }
.score-blue { color: #3498db; }

.top-bar {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    margin-bottom: 10px;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
}

select, .link-btn {
    padding: 8px;
    border-radius: 5px;
    background: #444;
    color: white;
    border: 1px solid #666;
    font-size: 0.95rem;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s;
}
select:hover, .link-btn:hover { border-color: #3498db; }

#invite-container {
    display: none;
    width: 100%;
    margin-bottom: 10px;
    text-align: center;
}
.link-btn { background-color: #27ae60; border-color: #2ecc71; font-weight: bold; }
.link-btn:hover { background-color: #2ecc71; }

#timer-display {
    font-family: 'Courier New', monospace;
    font-size: 2.2rem;
    font-weight: bold;
    color: #888;
    background: black;
    padding: 5px 15px;
    border-radius: 8px;
    border: 2px solid #444;
    min-width: 110px;
    text-align: center;
    margin-top: 5px;
    box-shadow: inset 0 0 10px rgba(255,255,255,0.1);
}

#status-bar {
    background: #3d3d4a;
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    margin-bottom: 20px;
    font-weight: bold;
    font-size: 1.1rem;
    text-align: center;
    width: 100%;
    border: 2px solid #555;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
}

.board-wrapper {
    position: relative;
    width: 340px;
    height: 340px;
    background: #222;
    border-radius: 15px;
    padding: 10px;
    margin-bottom: 20px;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.8);
    border: 1px solid #444;
}

#online-overlay {
    display: none;
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.9);
    border-radius: 15px;
    z-index: 50;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    font-weight: bold;
    text-align: center;
    padding: 20px;
    box-sizing: border-box;
}
.spinner {
    width: 50px; height: 50px;
    border: 5px solid rgba(255,255,255,0.2);
    border-top: 5px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.cancel-btn {
    flex: none; 
    margin-top: 20px;
    padding: 4px 10px;
    background-color: #ffffff;
    color: #000000;
    border: none;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 2px 0 #cccccc;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 1px;
    width: auto;
}
.cancel-btn:active {
    transform: translateY(2px);
    box-shadow: none;
}
.cancel-btn:hover { background-color: #f1f2f6; }

svg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; pointer-events: none; }
line { stroke: #555; stroke-width: 5; stroke-linecap: round; }

.grid {
    display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(3, 1fr);
    width: 100%; height: 100%; position: relative; z-index: 2;
}
.cell { display: flex; justify-content: center; align-items: center; cursor: pointer; position: relative; }
.cell:hover { background-color: rgba(255,255,255,0.08); border-radius: 50%; }

@keyframes popIn { 0% { transform: scale(0); } 70% { transform: scale(1.2); } 100% { transform: scale(1); } }
.piece {
    width: 60px; height: 60px; pointer-events: none;
    animation: popIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 8px 15px rgba(0,0,0,0.5);
}
.triangle { background-color: #ff4757; clip-path: polygon(50% 10%, 0% 90%, 100% 90%); }
.square { background-color: #3498db; width: 50px; height: 50px; border-radius: 8px; }
.selected { transform: scale(1.15); filter: drop-shadow(0 0 15px gold); z-index: 10; animation: pulse 1s infinite alternate; }
@keyframes pulse { from { filter: drop-shadow(0 0 10px gold); } to { filter: drop-shadow(0 0 25px gold); } }

.controls { display: flex; gap: 10px; width: 100%; }
button {
    padding: 12px 20px; border: none; font-weight: bold; cursor: pointer;
    border-radius: 5px; font-size: 1rem; flex: 1; transition: all 0.2s;
    text-transform: uppercase; letter-spacing: 1px;
    touch-action: manipulation; 
}
#action-btn { background-color: #3498db; color: white; box-shadow: 0 4px 0 #2980b9; }
#action-btn:active:not(:disabled) { transform: translateY(4px); box-shadow: none; }
#action-btn:disabled { background-color: #444; color: #888; cursor: not-allowed; border: 1px solid #666; box-shadow: none; }
#reset-btn { background: #ffa502; color: black; box-shadow: 0 4px 0 #e67e22; }
#reset-btn:active { transform: translateY(4px); box-shadow: none; }

.rules-panel {
    width: 250px; background: #1e1e24; padding: 20px; border-radius: 10px;
    border-left: 4px solid #3498db; display: flex; flex-direction: column; gap: 15px;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.5);
}
.rules-panel h3 { margin: 0 0 5px 0; color: #3498db; border-bottom: 1px solid #444; padding-bottom: 10px; }
.rule-item { display: flex; gap: 10px; align-items: flex-start; line-height: 1.4; font-size: 0.9rem; }
.icon { font-size: 1.1rem; min-width: 20px; font-weight: bold; color: #3498db; }

.content-section {
    max-width: 800px; margin: 40px auto 20px auto; color: #ccc; line-height: 1.6;
    padding: 0 20px; background: #2b2b36; border-radius: 15px; padding-bottom: 30px;
    border: 1px solid #3d3d4a; position: relative; z-index: 10;
}
.content-section h2 { color: #3498db; border-bottom: 1px solid #444; padding-bottom: 10px; margin-top: 30px; }
.content-section h3 { color: #ffa502; margin-top: 30px; margin-bottom: 10px;}

footer {
    margin-top: 30px; border-top: 1px solid #444; padding: 20px;
    text-align: center; color: #888; font-size: 0.9rem; width: 100%; max-width: 800px;
    position: relative; z-index: 10;
}
footer a { color: #aaa; text-decoration: none; transition: color 0.2s; }
footer a:hover { color: #3498db; }

#fireworksCanvas { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; pointer-events: none; z-index: 9999; }

@media (max-width: 800px) {
    .game-container { flex-direction: column; align-items: center; padding: 15px; }
    .rules-panel { width: 320px; margin-top: 10px; }
}

.modal-overlay {
    display: none; 
    position: fixed; 
    top: 0; left: 0; 
    width: 100vw; height: 100vh;
    background: rgba(0,0,0,0.85); 
    z-index: 1000; 
    justify-content: center; 
    align-items: center;
    backdrop-filter: blur(3px);
}
.modal-box {
    background: #2b2b36; 
    border: 2px solid #3498db; 
    border-radius: 15px;
    padding: 30px; 
    max-width: 500px; 
    width: 85%; 
    max-height: 80vh; 
    overflow-y: auto;
    color: #ccc; 
    box-shadow: 0 15px 40px rgba(0,0,0,0.9); 
    position: relative;
    animation: popInModal 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
@keyframes popInModal {
    0% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}
.modal-box h2 { color: #3498db; margin-top: 0; border-bottom: 1px solid #444; padding-bottom: 10px;}
.close-modal {
    position: absolute; 
    top: 15px; right: 20px; 
    font-size: 1.5rem; 
    color: #ff4757;
    cursor: pointer; 
    background: none; 
    border: none; 
    font-weight: bold;
    transition: color 0.2s;
}
.close-modal:hover { color: #ff6b81; }