:root {
    --terra: #5c3d2e;
    --terra-clara: #7a5238;
    --verde-fundo: #1b4332;
    --verde-painel: #2d6a4f;
    --verde-claro: #52b788;
    --agua: #4fc3f7;
    --texto: #f8f9fa;
    --celula: 112px;
}

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

body {
    min-height: 100vh;
    font-family: 'Poppins', 'Segoe UI', sans-serif;
    background: linear-gradient(165deg, var(--verde-fundo), var(--verde-painel) 50%, #40916c);
    color: var(--texto);
    padding: 20px 16px 110px;
}

.topo {
    text-align: center;
    margin-bottom: 24px;
    position: relative;
}

.topo h1 {
    font-size: clamp(1.25rem, 2.8vw, 1.9rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.btn-voltar {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    color: var(--texto);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 8px 14px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.15);
}

.btn-voltar:hover {
    background: rgba(255, 255, 255, 0.25);
}

.conteudo {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
    gap: 28px;
    max-width: 1150px;
    margin: 0 auto;
}

.area-jogo {
    flex: 1 1 560px;
}

.grade {
    display: grid;
    gap: 6px;
    padding: 16px;
    background: var(--terra);
    border: 4px solid #3e2a1f;
    border-radius: 18px;
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
    width: fit-content;
    margin: 0 auto;
}

.celula {
    width: var(--celula);
    height: var(--celula);
    background: var(--terra-clara);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.celula.vazia {
    opacity: 0.55;
}

.celula.cano {
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.2s ease;
}

.celula.cano:hover {
    box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.celula.selecionada {
    box-shadow: inset 0 0 0 4px #f4d03f, 0 0 14px rgba(244, 208, 63, 0.55);
    transform: scale(1.04);
    z-index: 2;
}

.celula.com-agua {
    background: linear-gradient(145deg, #3d6b8a, #2a5a75);
}

.celula.com-agua::after {
    content: '';
    position: absolute;
    inset: 10px;
    border-radius: 8px;
    background: radial-gradient(circle at 50% 35%, rgba(79, 195, 247, 0.5), transparent 72%);
    pointer-events: none;
}

.celula.fonte {
    background: linear-gradient(145deg, #1565c0, #0d47a1);
    cursor: default;
}

.celula.planta {
    background: #4a7c59;
    cursor: default;
}

.celula.planta.regada {
    background: #2e7d32;
    animation: crescer 0.5s ease;
}

@keyframes crescer {
    50% { transform: scale(1.06); }
}

.celula img {
    width: 90%;
    height: 90%;
    object-fit: contain;
    pointer-events: none;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

.celula.com-agua img {
    filter: drop-shadow(0 0 8px var(--agua)) brightness(1.12);
}

.icone-fonte {
    font-size: 3rem;
}

.icone-planta {
    font-size: 2.8rem;
}

.painel {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 220px;
}

.caixa-info {
    background: rgba(0, 0, 0, 0.32);
    border: 2px solid rgba(255, 255, 255, 0.12);
    border-radius: 14px;
    padding: 16px 18px;
}

.caixa-info span {
    display: block;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.88;
    margin-bottom: 6px;
}

.caixa-info strong,
.caixa-info p {
    font-size: 1.05rem;
    font-weight: 600;
}

.numero-nivel {
    font-size: 1.75rem;
    color: var(--verde-claro);
}

.plantas-info {
    text-align: center;
    font-size: 1rem;
}

.dica {
    text-align: center;
    margin-top: 18px;
    font-size: 1.05rem;
    font-weight: 500;
}

.botoes {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
    padding: 16px 20px 20px;
    background: linear-gradient(transparent, rgba(27, 67, 50, 0.96) 35%);
}

.acao {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 115px;
    padding: 12px 20px;
    border: none;
    border-radius: 14px;
    background: #fff;
    color: var(--verde-painel);
    font-family: inherit;
    font-weight: 700;
    font-size: 0.88rem;
    cursor: pointer;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.22);
    transition: transform 0.15s ease;
}

.acao:hover {
    transform: translateY(-2px);
}

.acao.principal {
    background: var(--agua);
    color: #0d3d56;
}

.icone {
    font-size: 1.7rem;
    line-height: 1;
}

.icone.valvula {
    color: #c62828;
}

.icone.bomba {
    color: #1565c0;
}

.aviso {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    color: #1b4332;
    padding: 24px 32px;
    border-radius: 16px;
    font-weight: 600;
    font-size: 1.1rem;
    text-align: center;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
    z-index: 50;
    max-width: 92%;
    border: 4px solid var(--verde-claro);
}

.aviso.oculto {
    display: none;
}

@media (max-width: 800px) {
    :root {
        --celula: 76px;
    }

    .btn-voltar {
        position: static;
        transform: none;
        display: inline-block;
        margin-bottom: 10px;
    }

    .painel {
        flex-direction: row;
        flex-wrap: wrap;
        width: 100%;
        justify-content: center;
    }

    .caixa-info {
        flex: 1 1 140px;
    }
}

@media (min-width: 1200px) {
    :root {
        --celula: 120px;
    }
}