:root {
    --bg: #171a1f;
    --panel: #242931;
    --card: #2f3640;
    --line: #434c59;
    --text: #ece6d8;
    --muted: #a3acb8;
    --accent: #e8ae3c;
}

* {
    box-sizing: border-box;
}

[hidden] {
    display: none !important;
}

body {
    margin: 0;
    padding: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: radial-gradient(circle at 50% 30%, #262c35, var(--bg) 70%);
    color: var(--text);
    font-family: 'Chakra Petch', 'Trebuchet MS', sans-serif;
    font-size: 15px;
}

#game-container {
    display: grid;
    grid-template-columns: 320px auto 320px;
    gap: 24px;
    align-items: start;
}

/* Painéis laterais */

.panel {
    padding: 16px;
    border: 2px solid var(--line);
    border-radius: 12px;
    background: var(--panel);
}

.panel h2 {
    margin: 0 0 12px;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--accent);
}

.panel h3 {
    margin: 14px 0 6px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--muted);
}

/* Ferramentas */

.button-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.button {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 8px 4px;
    border: 2px solid var(--line);
    border-radius: 8px;
    background: var(--card);
    text-align: center;
    cursor: pointer;
    user-select: none;
    transition: border-color 0.15s, background 0.15s, transform 0.15s;
}

.button > img {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.button > .divisor, .button > .tunnel {
    --cell: 44px;
}

/* Ícones pretos (girar) ficam claros no tema escuro */
.button > img.mono {
    filter: invert(1);
}

.button .name {
    font-size: 15px;
    font-weight: 600;
}

.button .desc {
    font-size: 12px;
    line-height: 1.2;
    color: var(--muted);
}

.recipe {
    display: flex;
    align-items: center;
    gap: 2px;
}

.recipe img {
    width: 16px;
    height: 16px;
}

.button:hover {
    border-color: var(--muted);
    background: #39414d;
    transform: translateY(-2px);
}

.button.selected {
    border-color: var(--accent);
    background: #4a4028;
    box-shadow: 0 0 12px rgba(232, 174, 60, 0.45);
}

/* Tabuleiro */

#level-info {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 20px;
}

.stat {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border: 2px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
}

.stat strong {
    font-size: 24px;
    color: var(--accent);
}

.stat img {
    width: 24px;
    height: 24px;
}

#grid {
    --cell: 40px;
    display: grid;
    grid-template-columns: repeat(var(--grid-size, 14), var(--cell));
    position: relative;
    user-select: none;
    -webkit-user-select: none;
    border: 2px solid var(--line);
    border-radius: 4px;
    background: #2b3038;
    overflow: hidden;
}

/* Com uma ferramenta selecionada, arrastar o dedo no mapa espalha esteiras em vez de rolar a página */
#grid.building-mode {
    touch-action: none;
}

/* Textura do chão: uma só para o grid todo, com as cores suavizadas para não competir com as peças */
#grid::before {
    content: '';
    position: absolute;
    inset: -8px; /* Sobra para o desfoque não clarear as bordas */
    background-image: var(--ground);
    background-size: 320px 320px;
    filter: blur(1.5px) saturate(0.3) brightness(0.6) contrast(0.6);
    opacity: 0.55;
}

/* A grama é a textura mais carregada: recebe um desfoque e uma suavização extras */
#grid[data-ground="0"]::before {
    filter: blur(2.5px) saturate(0.2) brightness(0.55) contrast(0.5);
    opacity: 0.4;
}

#production-info {
    padding: 10px;
    border: 1px solid black;
    background: white;
}

#production-info h3 {
    margin-top: 0;
}

.cell {
    width: var(--cell);
    height: var(--cell);
    position: relative;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05); /* Linhas do grid */
}

.cell:hover {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
    z-index: 1;
}

.cell img {
    max-width: 100%;
    max-height: 100%;
}

.cell > * {
    transition: transform 0.3s ease;
}

/* Esteira: um período da textura (126x70) rolando na mesma velocidade dos itens (uma célula por segundo) */
.belt {
    --tile: calc(var(--cell, 40px) * 70 / 126);
    width: var(--cell, 40px);
    height: var(--cell, 40px);
    border-radius: 10%;
    background-image: url('conveyor_tile.png');
    background-size: 100% var(--tile);
    animation: belt-move calc(70s / 126) linear infinite;
}

@keyframes belt-move {
    to { background-position-y: var(--tile); }
}

/* Divisor: duas meias esteiras saindo do centro, uma para cada lado */
.divisor {
    position: relative;
    width: var(--cell, 40px);
    height: var(--cell, 40px);
}

.divisor .belt {
    position: absolute;
    inset: 0;
    clip-path: inset(50% 0 0 0);
    transform: rotate(90deg);
}

.divisor .belt + .belt {
    transform: rotate(270deg);
}

/* Túnel: meia esteira que entra (ou sai, com .exit) de uma boca listrada */
.tunnel {
    position: relative;
    width: var(--cell, 40px);
    height: var(--cell, 40px);
}

.tunnel .belt {
    position: absolute;
    inset: 0;
    clip-path: inset(0 0 45% 0);
}

.tunnel::after {
    content: '';
    position: absolute;
    left: 4%;
    right: 4%;
    top: 45%;
    height: 55%;
    border: 2px solid #3a3f47;
    border-radius: 35% 35% 12% 12%;
    background: repeating-linear-gradient(135deg, #e8ae3c 0 12%, #2b2f36 12% 24%);
    box-shadow: inset 0 3px 4px rgba(0, 0, 0, 0.55), 0 2px 3px rgba(0, 0, 0, 0.5);
}

.tunnel.exit .belt {
    clip-path: inset(45% 0 0 0);
}

.tunnel.exit::after {
    top: 0;
    border-radius: 12% 12% 35% 35%;
    box-shadow: inset 0 -3px 4px rgba(0, 0, 0, 0.55), 0 2px 3px rgba(0, 0, 0, 0.5);
}

.item.underground {
    animation: underground 0.9s linear;
}

@keyframes underground {
    0%, 100% { opacity: 1; }
    20%, 80% { opacity: 0; }
}

.item {
    width: calc(var(--cell) * 0.6);
    height: calc(var(--cell) * 0.6);
    top: 0;
    left: 0;
    z-index: 10;
    pointer-events: none; /* O clique passa direto para a célula embaixo do item */
}

/* Ajuda */

#helper p {
    margin: 0 0 8px;
    line-height: 1.35;
}

#hint {
    min-height: 76px;
    padding: 10px 12px;
    border-left: 4px solid var(--accent);
    border-radius: 4px;
    background: var(--card);
}

.goal img {
    float: left;
    width: 44px;
    height: 44px;
    margin-right: 8px;
}

#helper ol {
    margin: 0;
    padding-left: 22px;
    line-height: 1.35;
}

#helper ol li {
    margin-bottom: 4px;
}

.recipes {
    margin: 0;
    padding: 0;
    list-style: none;
}

.recipes li {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 3px 0;
}

.recipes img {
    width: 22px;
    height: 22px;
}

/* Contorno claro para o minério preto não sumir no fundo escuro */
.recipe img, .recipes img, .stat img {
    filter: drop-shadow(0 0 1px rgba(255, 255, 255, 0.9));
}

.recipes .arrow {
    margin: 0 4px;
    color: var(--accent);
}

.tip {
    margin-top: 12px !important;
    padding-top: 10px;
    border-top: 1px dashed var(--line);
    color: var(--muted);
}

.tip strong {
    color: var(--text);
}

#level-complete-notification {
    font-size: 50px;
    color: var(--accent);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(23, 26, 31, 0.5);
    backdrop-filter: blur(20px);
    z-index: 100;
    align-items: center;
    justify-content: center;
    text-align: center;
    transition: opacity 0.5s, visibility 0.5s;
    opacity: 1;
}

/* Botões flutuantes de girar e remover: só aparecem em telas de toque, que não têm mouse em cima nem teclado */
#touch-actions {
    display: none;
    position: fixed;
    right: 16px;
    bottom: calc(16px + env(safe-area-inset-bottom));
    flex-direction: column;
    gap: 12px;
    z-index: 50;
}

.touch-action {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    width: 64px;
    height: 64px;
    padding: 0;
    border: 2px solid var(--accent);
    border-radius: 50%;
    background: rgba(23, 26, 31, 0.25);
    backdrop-filter: blur(2px);
    color: var(--accent);
    font: 600 11px 'Chakra Petch', 'Trebuchet MS', sans-serif;
    -webkit-tap-highlight-color: transparent;
    transition: opacity 0.15s, background 0.15s, transform 0.1s;
}

.touch-action svg {
    width: 24px;
    height: 24px;
}

.touch-action:active:not(:disabled) {
    background: rgba(232, 174, 60, 0.3);
    transform: scale(0.94);
}

.touch-action.selected {
    background: rgba(232, 174, 60, 0.35);
    box-shadow: 0 0 12px rgba(232, 174, 60, 0.6);
    color: var(--text);
}

.touch-action:disabled {
    opacity: 0.45;
}

.only-touch {
    display: none;
}

@media (hover: none) and (pointer: coarse) {
    #touch-actions {
        display: flex;
    }

    .only-touch {
        display: revert;
    }

    .only-mouse {
        display: none;
    }

    /* Sem mouse, a casa tocada por último é o alvo dos botões flutuantes */
    .cell.target {
        outline: 2px solid var(--accent);
        outline-offset: -2px;
        z-index: 1;
    }

    .cell:hover:not(.target) {
        outline: none;
    }

    .button:hover {
        border-color: var(--line);
        background: var(--card);
        transform: none;
    }

    .button.selected {
        border-color: var(--accent);
        background: #4a4028;
    }
}

/* Telas estreitas: tabuleiro em cima, painéis embaixo */
@media (max-width: 1320px) {
    #game-container {
        grid-template-columns: repeat(2, minmax(0, 320px));
        justify-content: center;
    }

    #board {
        grid-column: 1 / -1;
        grid-row: 1;
        justify-self: center;
    }
}

/* Celular: o mapa ocupa a largura toda e os painéis ficam mais compactos */
@media (max-width: 700px) {
    body {
        display: block;
        padding: 12px 12px calc(96px + env(safe-area-inset-bottom)); /* Folga para os botões flutuantes */
        font-size: 14px;
    }

    #game-container {
        grid-template-columns: minmax(0, 1fr);
        gap: 12px;
    }

    #board {
        justify-self: stretch;
        container-type: inline-size; /* O mapa se mede pela largura real do painel (cqw), sem contar a barra de rolagem */
    }

    #grid {
        --cell: min(40px, calc((100cqw - 4px) / var(--grid-size, 14))); /* 4px de borda */
        margin: 0 auto;
    }

    #level-info {
        gap: 8px;
        margin-bottom: 8px;
        font-size: 14px;
    }

    .stat {
        gap: 6px;
        padding: 4px 10px;
    }

    .stat strong {
        font-size: 18px;
    }

    .stat img {
        width: 18px;
        height: 18px;
    }

    .panel {
        padding: 12px;
    }

    .panel h2 {
        margin-bottom: 6px;
        font-size: 20px;
    }

    .panel h3 {
        margin: 10px 0 6px;
        font-size: 12px;
    }

    /* As quatro fábricas cabem em uma linha só */
    #toolbox .button-group:last-of-type {
        grid-template-columns: repeat(4, 1fr);
    }

    .button {
        padding: 6px 2px;
    }

    .button > img {
        width: 36px;
        height: 36px;
    }

    .button > .divisor, .button > .tunnel {
        --cell: 36px;
    }

    .button .name {
        font-size: 14px;
    }

    .button .desc {
        font-size: 11px;
    }

    #hint {
        min-height: 0;
    }

    #level-complete-notification {
        font-size: 32px;
    }
}