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



.container {
    max-width: 600px;
    width: 100%;
}

h1 {
    text-align: center;
    color: white;
    font-size: 2.5rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.topbar h1 {
    text-align: left;
    margin: 0;
    font-size: 1.9rem;
}

.title-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.small-btn {
    padding: 8px 12px;
    font-size: 0.95rem;
    border-radius: 8px;
    border: none;
    background: #ff7a59; /* distinct accent color */
    color: white;
    cursor: pointer;
}

.icon-btn {
    background: #17a2a6; /* teal accent for help (distinct from New button) */
    border: none;
    font-size: 1.1rem;
    color: white; /* white icon on accent background for visibility */
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.12);
}

.icon-btn:hover { transform: translateY(-2px); background: #138f86; }
.small-btn:hover { transform: translateY(-2px); }

/* segmented toggle buttons */
.segmented {
    display: flex;
    gap: 6px;
    margin-top: 6px;
    width: 100%;
}

.segmented .toggle-btn {
    flex: 1 1 0;
    min-width: 0;
    padding: 6px 8px;
    border-radius: 8px;
    border: 1px solid #ddd;
    background: white;
    color: #333;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.segmented .toggle-btn.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.game-info {
    background: white;
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.player-turn {
    text-align: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 15px;
}

.scores {
    display: flex;
    justify-content: space-around;
    gap: 20px;
}

.score {
    flex: 1;
    text-align: center;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
}

.score.active {
    background: linear-gradient(90deg, #667eea, #764ba2);
    color: white;
    box-shadow: 0 8px 24px rgba(102,126,234,0.25);
    transform: translateY(-4px);
}

.score.active .player-label { color: rgba(255,255,255,0.9); }
.score.active .player-score { color: white; }

.player-label {
    display: block;
    font-size: 1rem;
    color: #666;
    margin-bottom: 5px;
}

.player-score {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    color: #333;
}

#game-container {
    background: white;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

#game-board {
    width: 100%;
    max-width: 100%;
    height: auto;
    aspect-ratio: 1;
    touch-action: none;
}

.controls {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

button {
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: bold;
    color: white;
    background: #667eea;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

button:hover {
    background: #764ba2;
    transform: translateY(-2px);
    box-shadow: 0 7px 20px rgba(0, 0, 0, 0.4);
}

button:active {
    transform: translateY(0);
}

.grid-size {
    display: flex;
    align-items: center;
    gap: 10px;
    background: white;
    padding: 10px 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.grid-size label {
    font-weight: bold;
    color: #333;
}

select {
    padding: 8px 15px;
    font-size: 1rem;
    border: 2px solid #667eea;
    border-radius: 5px;
    background: white;
    cursor: pointer;
    outline: none;
}

select:focus {
    border-color: #764ba2;
}

.vs-computer {
    display: flex;
    align-items: center;
    gap: 8px;
    background: white;
    padding: 8px 12px;
    border-radius: 8px;
    box-shadow: 0 5px 10px rgba(0,0,0,0.12);
}

.vs-computer label {
    font-weight: bold;
    color: #333;
}

.player-names {
    display: flex;
    align-items: center;
    gap: 8px;
    background: white;
    padding: 8px 12px;
    border-radius: 8px;
    box-shadow: 0 5px 10px rgba(0,0,0,0.08);
}

.player-names label {
    font-weight: 600;
    color: #333;
    font-size: 0.9rem;
}

.player-names input {
    padding: 6px 8px;
    border: 1px solid #ddd;
    border-radius: 6px;
    width: 90px;
}

/* Modal overrides */
.modal-content button {
    padding: 10px 18px;
    background: #667eea;
    color: white;
    border-radius: 8px;
    border: none;
    cursor: pointer;
}

.modal-content button#close-modal {
    background: #e0e0e0;
    color: #333;
}

/* New game modal tweaks */
.modal .modal-content h2 {
    margin-bottom: 8px;
    color: #333;
}

.modal .modal-content select,
.modal .modal-content input[type="text"] {
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid #ddd;
    width: 100%;
}

.modal .modal-content .primary {
    background: #667eea;
}

.modal .modal-content {
    max-width: 420px;
}

/* SVG Styles */
.dot {
    fill: #333;
    cursor: default;
}

.line {
    stroke: #eee;
    stroke-width: 3;
    stroke-linecap: round;
    cursor: pointer;
    transition: stroke 0.2s ease;
}

.line:hover {
    stroke: #ddd;
    stroke-width: 4;
}

.line.active {
    cursor: default;
}

.line.active.player1 {
    stroke: #667eea;
    stroke-width: 4;
}

.line.active.player2 {
    stroke: #e74c3c;
    stroke-width: 4;
}

.box-fill {
    opacity: 0.7;
}

.box-fill.player1 {
    fill: #667eea;
}

.box-fill.player2 {
    fill: #e74c3c;
}

.box-text {
    font-size: 24px;
    font-weight: bold;
    fill: white;
    text-anchor: middle;
    dominant-baseline: middle;
    pointer-events: none;
    user-select: none;
}

/* Responsive Design */
@media (max-width: 600px) {
    h1 {
        font-size: 2rem;
    }

    .player-turn {
        font-size: 1.2rem;
    }

    .player-score {
        font-size: 1.5rem;
    }

    button {
        padding: 12px 24px;
        font-size: 1rem;
    }

    .controls {
        flex-direction: column;
        width: 100%;
    }

    .grid-size {
        width: 100%;
        justify-content: center;
    }
}

/* Winner Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal h2 {
    font-size: 2.5rem;
    color: #667eea;
    margin-bottom: 20px;
}

.modal p {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 30px;
}

.modal button {
    padding: 15px 40px;
}