* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Times New Roman','Segoe UI', 'Arial', sans-serif;
}

body {
    background: linear-gradient(135deg, #e0e7ff 0%, #a5b4fc 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    margin: 28px 0 24px 0;
    font-size: 2.8rem;
    color: #22223b;
    text-shadow: 1px 2px 8px #bfcaff;
}

#player-setup {
    margin: 0 0 28px 0;
    background: #fff;
    padding: 18px 28px;
    border-radius: 16px;
    box-shadow: 0 4px 24px 0 rgba(74,74,198,0.10);
    display: flex;
    gap: 12px;
    align-items: center;
}

#player-setup input {
    padding: 10px 16px;
    border-radius: 8px;
    border: 1.5px solid #bfcaff;
    font-size: 1rem;
    transition: border 0.2s;
    width: 240px; 
}

#player-setup input:focus {
    border: 1.5px solid #4a4ac6;
}

#player-setup button {
    padding: 10px 24px;
    border-radius: 8px;
    background: linear-gradient(90deg, #4a4ac6 60%, #6366f1 100%);
    color: #fff;
    border: none;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

#player-setup button:hover {
    background: linear-gradient(90deg, #6366f1 60%, #4a4ac6 100%);
    transform: translateY(-2px) scale(1.04);
}

.turn {
    margin: 0 0 28px 0;
    font-size: 1.3rem;
    font-weight: 600;
    min-height: 32px;
    padding: 8px 24px;
    border-radius: 8px;
    background: #f8fafc;
    display: inline-block;
}

.turn.red {
    color: #e63946;
    border: 2px solid #e63946;
    background: #fff0f3;
}

.turn.yellow {
    color: #ffb700;
    border: 2px solid #fbbf24;
    background: #fffbe7;
}

.turn.draw {
    color: #22223b;
    border: 2px solid #bfcaff;
    background: #f3f4f6;
}

#board {
    height: 615px;
    width: 790px;
    background: linear-gradient(135deg, #4a4ac6 60%, #6366f1 100%);
    border: 4px solid #bfcaff; 
    border-radius: 24px;
    display: flex;
    padding: 18px 12px 12px 12px;
    position: relative;
    margin: 0 auto 48px auto;
    box-shadow: 0 8px 32px 0 rgba(74,74,198,0.18);
    gap: 6px;
    transition: box-shadow 0.2s;
}

.column {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    flex: 1;
    cursor: pointer;
    gap: 6px;
    transition: background 0.15s;
    border-radius: 12px;
}

.column:hover,
.column.selected {
    background: rgba(74,74,198,0.13);
}

.tile {
    background: #fff;
    height: 80px;
    width: 80px;
    aspect-ratio: 1 / 1;
    margin: auto;
    border-radius: 50%;
    border: 3px solid #22223b;
    box-shadow: 0 2px 8px 0 rgba(74,74,198,0.10);
    transition: background 0.2s, border 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tile[style*="red"] {
    background: #e94b58;
}

.tile[style*="yellow"] {
    background: #fbc845;
}

footer {
    margin-top: 28px;
    margin-bottom: 18px;
    color: #22223b;
    font-size: 1.2rem;
    text-align: center;
}

.top-right-btn {
    position: fixed;
    top: 18px;
    right: 18px;
    padding: 8px 14px;
    border-radius: 10px;
    background: linear-gradient(90deg, #4a4ac6 60%, #6366f1 100%);
    color: #fff;
    border: none;
    font-size: 1.3rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 6px 18px rgba(74,74,198,0.18);
    z-index: 40;
    display: none;
}

.top-right-btn:hover { transform: translateY(-2px); }

@media (max-width: 480px) {
    .top-right-btn {
        font-size: 1rem;
        padding: 8px 10px;
        top: 12px;
        right: 12px;
        min-width: 44px;
        min-height: 44px;
    }
    #new-game-btn {
        position:static;
        margin-bottom: 24px;
    }
}

@media (max-width: 360px) {
    .top-right-btn {
        font-size: 0.95rem;
        padding: 6px 8px;
        top: 10px;
        right: 8px;
    }
}

@media (max-height: 600px) {
    .top-right-btn {
        top: 8px;
        right: 10px;
    }
}

.top-right-btn {
    transition: opacity 0.12s ease, transform 0.12s ease;
}

.top-right-btn[style*="display: none"] {
    opacity: 0;
}

.top-right-btn[style*="display: inline-block"] {
    opacity: 1;
}

@media (max-width: 900px) {
    #board {
        width: 98vw;
        height: 60vw;
        min-width: 320px;
        min-height: 240px;
        max-width: 99vw;
        max-height: 80vw;
    }
    .tile {
        height: 9vw;
        width: 9vw;
        min-width: 32px;
        min-height: 32px;
        max-width: 80px;
        max-height: 80px;
    }
}

@media (max-width: 600px) {
    #player-setup {
        flex-direction: column;
        gap: 8px;
        padding: 12px 8px;
    }
    #board {
        padding: 8px 2px 2px 2px;
        border-radius: 12px;
    }
    h1 {
        font-size: 2rem;
    }
}