:root {
    --bg-color: #2c3e50;
    --text-color: #ecf0f1;
    --green-color: #2ecc71;
    --red-color: #ff4757;
    --yellow-color: #f1c40f; /* Amarelo mais dourado para contraste */
    --blue-color: #2e86de;
    
    --green-lit: #7bed9f;
    --red-lit: #ff6b81;
    --yellow-lit: #ffffcc;   /* Amarelo quase branco para brilhar */
    --blue-lit: #54a0ff;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    user-select: none;
}

.version-tag {
    position: fixed;
    top: 10px;
    right: 10px;
    font-size: 0.6rem;
    color: rgba(255, 255, 255, 0.3);
    font-family: monospace;
    z-index: 1000;
    pointer-events: none;
}

.container {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 3px;
}

.game-board {
    position: relative;
    width: 90vw;
    height: 90vw;
    max-width: 400px;
    max-height: 400px;
    border-radius: 50%;
    background-color: #333;
    padding: 15px;
    box-shadow: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 10px;
}

@keyframes success-wave-anim {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 167, 74, 0.8);
    }
    100% {
        box-shadow: 0 0 0 50px rgba(0, 167, 74, 0);
    }
}

.game-board.success {
    animation: success-wave-anim 0.6s ease-out;
}

.genius-pad {
    width: 100%;
    height: 100%;
    cursor: pointer;
    /* Opacidade removida para cores mais vivas no mobile */
    transition: opacity 0.1s, transform 0.1s;
    border: 4px solid rgba(0,0,0,0.2);
    -webkit-tap-highlight-color: transparent; /* Remove o quadrado azul no mobile */
}

.genius-pad:active {
    transform: scale(0.98);
}

/* Formato dos botões para criar o círculo */
.green {
    background-color: var(--green-color);
    border-top-left-radius: 100%;
}

.red {
    background-color: var(--red-color);
    border-top-right-radius: 100%;
}

.yellow {
    background-color: var(--yellow-color);
    border-bottom-left-radius: 100%;
}

.blue {
    background-color: var(--blue-color);
    border-bottom-right-radius: 100%;
}

/* Estado "Aceso" */
.genius-pad.active, .genius-pad:active {
    opacity: 1;
    box-shadow: inset 0 0 40px rgba(255,255,255,0.9); /* Brilho interno forte */
    filter: brightness(1.3); /* Aumenta a luminosidade global */
}

.genius-pad.green.active { background-color: var(--green-lit); }
.genius-pad.red.active { background-color: var(--red-lit); }
.genius-pad.yellow.active { background-color: var(--yellow-lit); }
.genius-pad.blue.active { background-color: var(--blue-lit); }

/* Centro do jogo */
.center-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 160px;
    height: 160px;
    background-color: #ececec;
    border-radius: 50%;
    border: 10px solid #333;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    color: #333;
    padding: 10px;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.2);
}

.panel-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.label-text {
    font-size: 0.6rem;
    font-weight: 900;
    color: #333;
    text-transform: uppercase;
    margin-bottom: 2px;
    letter-spacing: 1px;
}

.display-panel {
    background-color: #222;
    color: #e74c3c;
    padding: 2px 5px; /* Reduzi o padding lateral */
    border-radius: 4px;
    width: 70px;     /* Largura fixa levemente maior que o original 60px */
    height: 30px;    /* Altura fixa para evitar pulos */
    display: flex;   /* Flex para centralizar o texto */
    justify-content: center;
    align-items: center;
    border: 2px solid #555;
    box-shadow: inset 0 0 5px rgba(0,0,0,0.8);
    white-space: nowrap;
    overflow: hidden;
}

#level-indicator {
    font-size: 1.2rem;
    font-weight: bold;
    font-family: 'Courier New', Courier, monospace;
    line-height: 1;
    transition: font-size 0.2s;
}

#level-indicator.small-text {
    font-size: 0.55rem; /* Texto bem menor para caber "GAME OVER" */
}

/* Slider de Dificuldade */
.difficulty-control {
    width: 80%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.slider-wrapper {
    position: relative;
    width: 100%;
    height: 20px; /* Altura suficiente para o thumb */
    display: flex;
    align-items: center;
    margin: 5px 0;
}

/* Input invisível mas funcional */
.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 100%;
    background: transparent;
    outline: none;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    cursor: pointer;
    margin: 0;
}

/* Remove o thumb padrão do input */
.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
}

/* Trilho visual */
.slider-track {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    width: 100%;
    height: 6px;
    background: #bdc3c7;
    border-radius: 3px;
    z-index: 1;
    pointer-events: none;
}

/* Bolinha visual animada */
.slider-thumb {
    position: absolute;
    top: 50%;
    left: 0%; /* Controlado via JS */
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: #f39c12;
    border-radius: 50%;
    border: 2px solid #d35400;
    z-index: 1;
    pointer-events: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    transition: left 0.3s cubic-bezier(0.25, 0.1, 0.25, 1), transform 0.1s;
}

/* Efeitos de interação na bolinha visual */
.slider:active ~ .slider-thumb {
    transform: translate(-50%, -50%) scaleX(1.3) scaleY(0.9);
    background: #e67e22;
    box-shadow: 0 0 15px rgba(243, 156, 18, 0.6);
}

.slider:hover ~ .slider-thumb {
    transform: translate(-50%, -50%) scale(1.1);
}

.slider:active:hover ~ .slider-thumb {
    transform: translate(-50%, -50%) scaleX(1.3) scaleY(0.9);
}

.diff-legend {
    display: flex;
    justify-content: space-between;
    width: 100%;
    font-size: 0.5rem;
    color: #7f8c8d;
    font-weight: bold;
    margin-top: -5px; /* Sobe os números para mais perto da linha */
}

.diff-legend span {
    transition: color 0.2s, transform 0.2s;
}

.diff-legend span.active {
    color: #f39c12;
}

/* Botão Retangular Jogar */
.start-btn-rect {
    width: 40px;
    height: 20px;
    border-radius: 4px;
    background-color: var(--green-color);
    color: white;
    border: none;
    font-weight: bold;
    cursor: pointer;
    font-size: 0.6rem;
    line-height: 1;
    box-shadow: 0 3px 0 #1e8449, 0 4px 4px rgba(0,0,0,0.3);
    transition: transform 0.1s, box-shadow 0.1s, background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-left: 1px; /* Ajuste visual para centralizar o triângulo */
}

.start-btn-rect:active {
    transform: translateY(4px);
    box-shadow: 0 0 0 #1e8449, inset 0 2px 5px rgba(0,0,0,0.3);
}

.start-btn-rect:disabled {
    background-color: #95a5a6;
    box-shadow: none;
    cursor: not-allowed;
    transform: translateY(4px);
    color: rgba(255,255,255,0.5);
}

/* LinkedIn Icon */
.linkedin-link {
    position: fixed;
    bottom: 15px;
    left: 15px; 
    color: var(--text-color);
    opacity: 0.6;
    transition: transform 0.3s, opacity 0.3s, color 0.3s;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.linkedin-link svg {
    width: 24px; 
    height: 24px;
}

.linkedin-link:hover {
    transform: translateY(-5px);
    opacity: 1;
    color: #0077b5;
}

@media (min-width: 600px) {
    .game-board {
        width: 450px;
        height: 450px;
        max-width: none;
        max-height: none;
    }
    
    .center-circle {
        width: 220px;
        height: 220px;
    }

    #level-indicator {
        font-size: 1.8rem;
    }
    
    #level-indicator.small-text {
        font-size: 0.8rem;
    }

    .display-panel {
        width: 100px; 
        height: 40px;
        padding: 5px;
    }

    .start-btn-rect {
        width: 60px;
        height: 30px;
        font-size: 1rem;
    }

    .linkedin-link {
        left: auto;
        right: 20px; 
        bottom: 20px;
    }

    .linkedin-link svg {
        width: 32px; 
        height: 32px;
    }
}