/* ===============================
   🎨 ESTILO GENERAL DEL PUZZLE
   =============================== */

body {
    background: url("../img/fondo_mate.png") no-repeat center center fixed !important;
    background-size: cover;
    color: #f5f5f5;

    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    min-height: 100vh;

    padding-top: 40px;
    gap: 20px;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.65); /* oscurece un poco la imagen */
    z-index: -1;
}

h1 {
    margin: 0;
    font-weight: 700;
    color: #2d3f8d;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

#topbar {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    margin-bottom: 10px;
}

button,
select {
    padding: 7px 16px;
    border-radius: 8px;
    border: 1px solid #496adc;
    background: #ffffff;
    cursor: pointer;
    font-size: 1rem;
    transition: 0.15s ease-in-out;
}

button:hover,
select:hover {
    background: #e6ecff;
}

button:active {
    transform: scale(0.95);
}

/* ===============================
   🧩 CONTENEDOR DEL JUEGO
   =============================== */

.game-container {
    width: 100%;
    max-width: 600px;
    padding: 1.5rem;
    background: #1e1e1e;
    border-radius: 1.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    box-sizing: border-box; /* 🔥 Evita que padding haga crecer el ancho */
    margin: 0 auto; /* 🔥 Centra en pantallas grandes */
}

/* Tablets y móviles grandes */
@media (max-width: 768px) {
    .game-container {
        max-width: 95vw; /* deja un pelín de margen a los lados */
        padding: 1rem;
    }
}

/* Móviles pequeños */
@media (max-width: 480px) {
    .game-container {
        max-width: 90vw; /* aún más margen lateral */
        padding: 0.75rem; /* menos espacio interior */
        border-radius: 1rem;
    }
}

/* --- FORZAR el ranking debajo y centrado --- */
.ranking-container {
    width: 100%;
    max-width: 320px; /* MÁS PEQUEÑO */
    margin: 25px auto; /* CENTRADO */
    padding: 15px;
    background: rgba(0, 0, 0, 0.25); /* semitransparente */
    border-radius: 12px;
    text-align: center;
}

/* Título más pequeño */
.ranking-container h2 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #ffd700;
}

/* Quitar los puntos de las listas del ranking */
.ranking-container ul {
    list-style: none; /* quita los bullets */
    margin: 0;
    padding-left: 0; /* quita sangrado izquierdo */
}

/* (Opcional) un poco de espacio entre filas */
.ranking-container li {
    margin-bottom: 4px;
}

/* Lista centrada */
#rankingList {
    list-style: none;
    padding: 0;
    margin: 0 auto;
    width: 100%;
}

/* Cada entrada más pequeña */
#rankingList li {
    font-size: 0.95rem;
    background: rgba(255, 255, 255, 0.15);
    margin: 6px 0;
    padding: 8px 10px;
    border-radius: 8px;
    text-align: left;
}

/* Hover bonito */
#rankingList li:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Centramos el enlace usando flex o block */
.back-link {
    display: block; /* Con esto ya lo centra */
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
    color: #f5f5f5;
}

.back-link:hover {
    background: #666;
    transform: translateY(-2px);
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.4);
}

/* ===============================
   ❤️ HUD / VIDAS / INFO
   =============================== */

#hud {
    display: flex;
    gap: 2.5rem;
    font-size: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

#lives span {
    font-size: 1.5rem;
    margin-right: 2px;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.15));
}

/* ===============================
   🧮 TABLERO DE ECUACIONES
   =============================== */

#board {
    max-width: 95%;
    display: block;
    padding: 16px;
    background: #fff8d8;
    border-radius: 14px;
    border: 2px solid #ecdca4;
    box-shadow:
        0 3px 8px rgba(0, 0, 0, 0.15),
        inset 0 0 6px rgba(255, 255, 255, 0.6);
    margin-bottom: 10px;
}

.row {
    display: flex;
}

/* 🟨 CELDAS */
.cell {
    width: 50px;
    height: 50px;
    border: 1px solid #c7b57a;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    box-sizing: border-box;
    border-radius: 6px;
    transition: 0.15s ease;
    color: #000 !important;
}

.cell.static {
    background: #ffe7a3;
}

.cell.blank {
    background: #ffeeb8;
    cursor: pointer;
}

.cell.blank:hover {
    background: #ffefc9;
    transform: translateY(-2px);
}

.cell.empty {
    border: none;
    background: transparent;
}

/* Cuando una ecuación está correcta */
.equation-ok {
    box-shadow: inset 0 0 0 3px #6fd56e;
    background: #e4ffd8 !important;
}

/* Error visual */
.cell.wrong-flash {
    animation: flashRed 0.3s ease;
}

@keyframes flashRed {
    0% {
        background: #ffbfbf;
    }
    100% {
        background: #ffeeb8;
    }
}

/* ===============================
   🔢 FICHAS / NÚMEROS
   =============================== */

#numbers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(50px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

/* Móviles: máximo 6 por fila */
@media (max-width: 480px) {
    #numbers {
        grid-template-columns: repeat(4, 1fr);
    }
}
.num-tile {
    width: 54px;
    height: 54px;
    border-radius: 8px;
    border: 2px solid #425cd0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    background: #e5ebff;
    color: #000 !important;
    font-weight: 600;
    transition: 0.15s ease;
}

.num-tile:hover {
    background: #d9e2ff;
    transform: translateY(-2px);
}

.num-tile.selected {
    outline: 3px solid #ff9800;
    background: #fff4d2;
}

.num-tile.used {
    opacity: 0.35;
    cursor: default;
}

/* ===============================
   💬 MENSAJE DE ESTADO
   =============================== */

#message {
    min-height: 1.6rem;
    font-weight: 700;
    text-align: center;
    color: #2d2d2d;
    margin-top: 6px;
}