/* Estilos Generales y Resets */
body {
    font-family: 'Comic Sans MS', 'Chalkboard SE', 'Arial Rounded MT Bold', sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    height: 100vh;
    margin: 0;
    padding: 8px;
    background: linear-gradient(160deg, #ff8c66, #ffa07a, #ffb399);
    color: #4A4A4A;
    perspective: 1500px;
    overflow: hidden;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 0.3s ease, color 0.3s ease; 
}

*, *::before, *::after {
    box-sizing: border-box;
}

.hidden {
    display: none !important;
}

/* --- BOTONES GLOBALES FIJOS (TEMA Y MÚSICA) --- */
#toggle-theme-btn, #toggle-music-btn { 
    position: fixed; 
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    box-shadow: 0 3px 0 rgba(0,0,0,0.2), 0 5px 7px rgba(0,0,0,0.25);
    transform: translateZ(25px) translateY(-1px);
    transition: all 0.2s ease-out;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10001; 
    padding: 0;
    line-height: 1;
}

#toggle-theme-btn {
    top: 15px; 
    left: 15px;     
    font-size: 1.6em; 
    background: linear-gradient(145deg, #FFEB3B, #FBC02D); 
    color: #5D4037; 
    box-shadow: 0 3px 0 #F9A825, 0 5px 7px rgba(0,0,0,0.25);
}

#toggle-music-btn {
    top: 15px; 
    right: 15px; 
    font-size: 1.5em; 
    background: linear-gradient(145deg, #78909C, #546E7A); 
    color: white;
    box-shadow: 0 3px 0 #37474F, 0 5px 7px rgba(0,0,0,0.25);
}


#toggle-theme-btn:hover, #toggle-music-btn:hover {
    transform: translateZ(30px) translateY(-4.5px) scale(1.05);
    filter: brightness(1.1);
}
#toggle-theme-btn:active, #toggle-music-btn:active {
    transform: translateZ(20px) translateY(0px) scale(0.95);
    filter: brightness(0.9);
}
#toggle-theme-btn:active { box-shadow: 0 1.5px 0 #F9A825, 0 2px 4px rgba(0,0,0,0.2); }
#toggle-music-btn:active { 
    box-shadow: 0 1.5px 0 #37474F, 0 2px 4px rgba(0,0,0,0.2);
    background: linear-gradient(145deg, #546E7A, #455A64);
}


/* --- PANTALLA DE INICIO --- */
#start-screen {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    background: inherit; 
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10000;
    transition: background-color 0.3s ease;
}

#play-button {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(145deg, #4CAF50, #81C784);
    border: none;
    color: white;
    font-size: 5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2), 0 6px 6px rgba(0,0,0,0.23),
                inset 0 -5px 10px rgba(0,0,0,0.1), inset 0 5px 10px rgba(255,255,255,0.3);
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out;
    transform: scale(1) translateZ(20px);
}
#play-button:hover {
    transform: scale(1.1) translateZ(30px);
    box-shadow: 0 15px 25px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22),
                inset 0 -5px 10px rgba(0,0,0,0.1), inset 0 5px 10px rgba(255,255,255,0.3);
}
#play-button:active {
    transform: scale(0.95) translateZ(10px);
    box-shadow: 0 5px 10px rgba(0,0,0,0.2), 0 3px 3px rgba(0,0,0,0.23),
                inset 0 -3px 6px rgba(0,0,0,0.1), inset 0 3px 6px rgba(255,255,255,0.3);
}


/* Contenedores Principales (Pantallas y Modales) */
#main-menu,
.selection-modal,
#game-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center; 
    background: rgba(255, 255, 255, 0.97);
    padding: 10px 10px 5px 10px; 
    border-radius: 30px;
    box-shadow:
        0 15px 30px rgba(0, 0, 0, 0.22), 0 7px 12px rgba(0, 0, 0, 0.18),
        inset 0 -6px 10px rgba(0, 0, 0, 0.07), inset 0 4px 8px rgba(255, 255, 255, 0.4);
    width: 100%;
    max-width: 450px;
    height: calc(100vh - 16px); 
    max-height: calc(100vh - 16px);
    overflow-y: auto;
    animation: fadeInScreen 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transform-style: preserve-3d;
    position: relative; 
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}
#main-menu { 
    justify-content: space-around; 
}

#range-selection-modal, 
#table-selection-modal {
    justify-content: flex-start; 
}
#range-selection-modal .selection-buttons,
#table-selection-modal .selection-buttons {
    margin-top: auto;    
    margin-bottom: auto; 
}
#range-selection-modal .back-to-main-menu-button,
#table-selection-modal .back-to-main-menu-button {
    margin-top: 20px; 
}

#congrats-modal { 
    justify-content: center; 
    align-items: center; 
}


#game-screen {
    justify-content: flex-start; 
    padding-top: 10px; 
}


@keyframes fadeInScreen {
    from { opacity: 0; transform: translateY(25px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* --- PANTALLA PRINCIPAL --- */

#main-title {
    font-size: clamp(2.3rem, 8.5vw, 3.6rem);
    font-weight: 900;
    color: #FF6347;
    text-transform: uppercase;
    line-height: 1.05;
    margin: 0 auto 5px auto; 
    padding: 2px 0;
    text-shadow:
      1px 1px 0 #FFF, -1px -1px 0 #CD5B45, 1px -1px 0 #CD5B45, -1px 1px 0 #CD5B45,
      1.5px 1.5px 0px #CD5B45, 2.5px 2.5px 0px #B22222, 3.5px 3.5px 0px #B22222,
      4px 4px 6px rgba(0,0,0,0.35);
    transform: rotateX(-4deg) rotateY(1deg);
    transform-style: preserve-3d;
    animation: titlePop 0.8s ease-out, titleSharedBounce 1.8s 0.8s infinite ease-in-out;
    transition: color 0.3s ease, text-shadow 0.3s ease;
    padding-top: 55px; 
    margin-top: -40px; 
}
@keyframes titlePop {
    0% { transform: scale(0.5) rotateX(-15deg) rotateY(0deg); opacity: 0; }
    70% { transform: scale(1.05) rotateX(2deg) rotateY(0deg); opacity: 1; }
    100% { transform: scale(1) rotateX(-4deg) rotateY(1deg); opacity: 1; }
}
@keyframes titleSharedBounce {
    0%, 100% { transform: rotateX(-4deg) rotateY(1deg) translateY(0px) scale(1); }
    50% { transform: rotateX(-4deg) rotateY(1deg) translateY(-7px) scale(1.03); }
}


#guia-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin: 5px auto 2px auto; 
    padding: 5px;
    transform: translateZ(15px);
    animation: avatarEnter 1s 0.5s ease-out backwards, avatarSharedBounce 1.8s 1.2s infinite ease-in-out;
}
@keyframes avatarEnter {
    from { opacity: 0; transform: translateY(20px) scale(0.8) translateZ(15px); }
    to { opacity: 1; transform: translateY(0) scale(1) translateZ(15px); }
}
@keyframes avatarSharedBounce {
    0%, 100% { transform: translateZ(15px) translateY(0px) scale(1); }
    50% { transform: translateZ(15px) translateY(-7px) scale(1.03); }
}

#avatar-img {
    width: 75px;
    height: 75px;
    border-radius: 50%;
    border: 2.5px solid #fff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.20), 0 0 0 2px #ffcc80;
    flex-shrink: 0;
}

.bubble {
    position: relative;
    background-color: #FFF3E0;
    padding: 9px 14px;
    border-radius: 16px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.10);
    max-width: 220px;
    border: 1.5px solid #FFB74D;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.bubble::before {
    content: ""; position: absolute; top: 50%; left: -15px; margin-top: -8px;
    border-width: 8px; border-style: solid; border-color: transparent #FFB74D transparent transparent;
    transition: border-color 0.3s ease;
}
.bubble::after {
    content: ""; position: absolute; top: 50%; left: -13px; margin-top: -7px;
    border-width: 7px; border-style: solid; border-color: transparent #FFF3E0 transparent transparent;
    transition: border-color 0.3s ease;
}

.bubble p {
    font-size: clamp(0.8rem, 2.9vw, 0.95rem);
    line-height: 1.3;
    margin: 0;
    color: #BF360C;
    transition: color 0.3s ease;
}

/* Modificación de la sección de otros juegos para usar flexbox */
#other-games-section {
    margin: 8px auto 5px auto; 
    transform: translateZ(10px);
    display: flex; /* Ahora es un contenedor flex */
    justify-content: center; /* Centra los íconos horizontalmente */
    gap: 15px; /* Espacio entre los íconos */
}
#other-games-section a {
    display: inline-block; 
    text-decoration: none;
}
/* Estilos para los íconos de otros juegos, ahora con una clase compartida */
.other-game-app-icon { /* CAMBIO DE ID A CLASE */
    width: 60px;
    height: 60px;
    border-radius: 12px;
    border: 2px solid white;
    box-shadow: 0 3px 0 rgba(0,0,0,0.15), 0 5px 7px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: block; 
}
.other-game-app-icon:hover { /* CAMBIO DE ID A CLASE */
    transform: scale(1.08) translateY(-3px);
    box-shadow: 0 4px 0 rgba(0,0,0,0.15), 0 7px 9px rgba(0,0,0,0.25);
}
.other-game-app-icon:active { /* CAMBIO DE ID A CLASE */
    transform: scale(1.02) translateY(-1px);
    box-shadow: 0 2px 0 rgba(0,0,0,0.15), 0 3px 5px rgba(0,0,0,0.2);
}


#total-stars-display {
    font-size: clamp(1.1rem, 3.5vw, 1.4rem);
    font-weight: bold;
    color: #E65100;
    margin: 5px auto 8px auto; 
    padding: 5px 10px;
    background-color: #FFF3E0;
    border: 2px solid #FFB74D;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transform: translateZ(10px);
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

#install-pwa-button {
    padding: 8px 15px; 
    font-size: clamp(0.9rem, 3.2vw, 1.2rem); 
    max-width: 220px; 
    font-weight: bold;
    color: white;
    background: linear-gradient(145deg, #ff7e5f, #feb47b); 
    border: none;
    border-radius: 15px;
    cursor: pointer;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    box-shadow: 0 5px 0 #d6603c, 0 7px 10px rgba(0,0,0,0.25),
                inset 0 -3px 5px rgba(0,0,0,0.1), inset 0 3px 5px rgba(255,255,255,0.2);
    transition: all 0.15s ease-out;
    transform: translateZ(15px) translateY(-2px);
    transform-style: preserve-3d;
    margin: 8px auto 10px auto; 
    display: flex; 
    align-items: center;
    justify-content: center;
    width: 85%; 
}

#install-pwa-button .install-icon {
    margin-right: 6px; 
    font-size: 1.1em;  
}

#install-pwa-button:hover {
    transform: translateZ(18px) translateY(-5px);
    filter: brightness(1.1);
}
#install-pwa-button:active {
    transform: translateZ(10px) translateY(0px);
    box-shadow: 0 2px 0 #d6603c, 0 3px 5px rgba(0,0,0,0.2);
    filter: brightness(0.95);
}

.decorations {
    margin: 10px 0 10px 0; 
    padding: 0 3px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 7px;
}

.decorations span {
    font-size: clamp(1.5rem, 4.8vw, 2.1rem);
    font-weight: bold;
    padding: 6px 9px;
    border-radius: 9px;
    color: #fff;
    text-shadow: 0.5px 0.5px 1px rgba(0,0,0,0.35);
    min-width: 1.4em;
    line-height: 1;
    text-align: center;
    box-shadow: 0 3.5px 0px rgba(0,0,0,0.16), inset 0 1px 1px rgba(255,255,255,0.2), inset 0 -1px 1px rgba(0,0,0,0.06);
    animation: decorBounce 1.8s infinite ease-in-out;
}
@keyframes decorBounce {
    0%, 100% { transform: translateY(-1px) translateZ(7px) scale(1); }
    50%  { transform: translateY(-8px) translateZ(10px) scale(1.05); }
}
.decorations span:nth-child(1) { background: #e91e63; animation-delay: 0.0s; }
.decorations span:nth-child(2) { background: #00bcd4; animation-delay: 0.1s; }
.decorations span:nth-child(3) { background: #8bc34a; animation-delay: 0.2s; }
.decorations span:nth-child(4) { background: #ffeb3b; color: #5D4037; text-shadow: none; animation-delay: 0.3s; }
.decorations span:nth-child(5) { background: #9c27b0; animation-delay: 0.4s; }
.decorations span:nth-child(6) { background: #ff9800; animation-delay: 0.5s; }
.decorations span:nth-child(7) { background: #2196f3; animation-delay: 0.6s; }
.decorations span:nth-child(8) { background: #f44336; animation-delay: 0.7s; }


.menu-buttons {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: 10px; 
    margin-bottom: 15px; 
}
.menu-buttons button {
    display: flex; align-items: center; justify-content: center;
    width: 85%; 
    max-width: 240px; 
    padding: 10px 15px;
    font-size: clamp(1.25rem, 4vw, 1.55rem); font-weight: bold;
    color: white; border: none; border-radius: 16px; cursor: pointer;
    text-shadow: 0.5px 0.5px 1.5px rgba(0,0,0,0.4);
    transition: all 0.15s ease-out;
    transform: translateZ(16px) translateY(-2px); transform-style: preserve-3d;
}
.menu-buttons button .op-icon {
    font-size: 0.95em; margin-right: 9px; padding: 3.5px 7px; border-radius: 7px;
    color: white; text-shadow: 0.5px 0.5px 0.5px rgba(0,0,0,0.15);
    transform: translateZ(3.5px) translateY(-0.5px); box-shadow: 0 1px 1.5px rgba(0,0,0,0.12);
    display: inline-block; line-height: 1;
}
.menu-buttons button[data-operation="suma"] { background: linear-gradient(to bottom, #66BB6A, #4CAF50); box-shadow: 0 4.5px 0 #388E3C, 0 6.5px 8.5px rgba(0,0,0,0.23); }
.menu-buttons button[data-operation="suma"] .op-icon { background-color: #388E3C; }
.menu-buttons button[data-operation="resta"] { background: linear-gradient(to bottom, #EF5350, #F44336); box-shadow: 0 4.5px 0 #D32F2F, 0 6.5px 8.5px rgba(0,0,0,0.23); }
.menu-buttons button[data-operation="resta"] .op-icon { background-color: #D32F2F; }
.menu-buttons button[data-operation="multiplicacion"] { background: linear-gradient(to bottom, #42A5F5, #2196F3); box-shadow: 0 4.5px 0 #1976D2, 0 6.5px 8.5px rgba(0,0,0,0.23); }
.menu-buttons button[data-operation="multiplicacion"] .op-icon { background-color: #1976D2; }
.menu-buttons button[data-operation="division"] { background: linear-gradient(to bottom, #FFCA28, #FFB300); box-shadow: 0 4.5px 0 #FFA000, 0 6.5px 8.5px rgba(0,0,0,0.23); }
.menu-buttons button[data-operation="division"] .op-icon { background-color: #FFA000; }

.menu-buttons button:hover { transform: translateZ(19px) translateY(-5.5px); filter: brightness(1.08); }
.menu-buttons button:active { transform: translateZ(11px) translateY(0px); filter: brightness(0.92); }
.menu-buttons button[data-operation="suma"]:active { box-shadow: 0 1.8px 0 #388E3C, 0 2.5px 4.5px rgba(0,0,0,0.19); }
.menu-buttons button[data-operation="resta"]:active { box-shadow: 0 1.8px 0 #D32F2F, 0 2.5px 4.5px rgba(0,0,0,0.19); }
.menu-buttons button[data-operation="multiplicacion"]:active { box-shadow: 0 1.8px 0 #1976D2, 0 2.5px 4.5px rgba(0,0,0,0.19); }
.menu-buttons button[data-operation="division"]:active { box-shadow: 0 1.8px 0 #FFA000, 0 2.5px 4.5px rgba(0,0,0,0.19); }


/* --- MODALES Y PANTALLA DE JUEGO --- */
.selection-modal h2 {
    font-size: clamp(1.8rem, 6vw, 2.5rem); color: #E65100; 
    margin-bottom: 20px; 
    text-shadow: 1px 1px 0 #FFFDE7, 2px 2px 0 #FFCC80, 3px 3px 5px rgba(0,0,0,0.2);
    transform: translateZ(10px);
    transition: color 0.3s ease, text-shadow 0.3s ease;
    padding-left: 60px; 
    padding-right: 60px; 
    padding-top: 10px; 
    width: 100%;
    box-sizing: border-box;
    margin-top: 0; 
    line-height: 1.2; 
}
.selection-buttons { 
    display: flex; flex-direction: column; align-items: center;
    gap: 15px; width: 100%; 
    flex-grow: 1; 
    justify-content: center; 
    margin-bottom: 10px; 
}

.range-buttons-column button {
    display: flex; 
    justify-content: space-between; 
    align-items: center;
    background: linear-gradient(to bottom, #29B6F6, #0288D1);
    box-shadow: 0 5px 0 #01579B, 0 7px 9px rgba(0,0,0,0.25);
}
.level-stars-display {
    font-size: 0.8em; 
    color: #E1F5FE; 
    background-color: rgba(0,0,0,0.15);
    padding: 3px 6px;
    border-radius: 8px;
    margin-left: 10px; 
}

.table-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
    width: 90%; max-width: 300px; 
    margin: 0 auto; 
    justify-items: center; 
}
.table-grid button {
    display: flex;
    flex-direction: column; 
    align-items: center;
    justify-content: center;
    background: linear-gradient(to bottom, #7E57C2, #5E35B1);
    box-shadow: 0 5px 0 #4527A0, 0 7px 9px rgba(0,0,0,0.25);
    width: 100%; 
    padding: 10px 8px; 
    font-size: clamp(1.4rem, 5vw, 1.7rem);
}
.table-number {
    display: block;
    margin-bottom: 4px; 
}
.level-stars-display-table {
    font-size: 0.7em; 
    color: #EDE7F6; 
    background-color: rgba(0,0,0,0.15);
    padding: 2px 5px;
    border-radius: 6px;
}


.range-buttons-column button, 
.table-grid button { 
    width: 80%; max-width: 280px; padding: 15px; 
    font-size: clamp(1.3rem, 4.5vw, 1.6rem); font-weight: bold;
    color: white; border: none; border-radius: 18px; cursor: pointer;
    text-shadow: 1px 1px 1px rgba(0,0,0,0.4);
    transition: all 0.15s ease-out;
    transform: translateZ(15px) translateY(-2px);
}
.range-buttons-column button:active { 
    transform: translateZ(10px) translateY(0px);
    box-shadow: 0 2px 0 #01579B, 0 3px 5px rgba(0,0,0,0.2);
}
.table-grid button:active { 
    transform: translateZ(10px) translateY(0px);
    box-shadow: 0 2px 0 #4527A0, 0 3px 5px rgba(0,0,0,0.2);
}

.back-to-main-menu-button, 
#back-to-menu-game, 
#continue-from-congrats-btn {
    width: 80%; max-width: 280px; padding: 15px;
    font-size: clamp(1.3rem, 4.5vw, 1.6rem); font-weight: bold;
    color: white; border: none; border-radius: 18px; cursor: pointer;
    text-shadow: 1px 1px 1px rgba(0,0,0,0.4);
    transition: all 0.15s ease-out;
    transform: translateZ(15px) translateY(-2px);
    background: linear-gradient(to bottom, #FFB74D, #FF9800); 
    box-shadow: 0 5px 0 #F57C00, 0 7px 9px rgba(0,0,0,0.25);
    flex-shrink: 0; 
}

.selection-modal .back-to-main-menu-button { 
    margin-top: 15px; 
    margin-bottom: 10px; 
}
#back-to-menu-game { 
    margin-top: auto; 
    margin-bottom: 8px; 
}
#continue-from-congrats-btn { 
    margin-top: 20px; 
    margin-bottom: 10px; 
}

.back-to-main-menu-button:active, 
#back-to-menu-game:active, 
#continue-from-congrats-btn:active {
    transform: translateZ(10px) translateY(0px);
    box-shadow: 0 2px 0 #F57C00, 0 3px 5px rgba(0,0,0,0.2);
}


#operation-title-game {
    font-size: clamp(1.5rem, 5vw, 2.1rem); 
    color: #D84315; 
    margin-bottom: 8px; 
    text-shadow: 1px 1px 0 #FFCCBC, 2px 2px 3px rgba(0,0,0,0.15); 
    transform: translateZ(5px);
    transition: color 0.3s ease, text-shadow 0.3s ease;
    padding-left: 60px; 
    padding-right: 60px; 
    text-align: center; 
    width: 100%; 
    box-sizing: border-box; 
    margin-top: 5px; 
    line-height: 1.2; 
    white-space: pre-line; 
}

#question-area {
    font-size: clamp(2.6rem, 8vw, 3.5rem); 
    font-weight: bold; color: #37474F;
    padding: 8px 6px; 
    margin: 0 auto 8px auto; 
    text-shadow: 2px 2px 0px #CFD8DC, 4px 4px 0px #90A4AE, 6px 6px 8px rgba(0,0,0,0.2);
    transform: translateZ(20px) rotateX(-3deg); background: rgba(255,255,255,0.3);
    border-radius: 15px; width: fit-content; max-width: 95%;
    transition: color 0.3s ease, text-shadow 0.3s ease, background-color 0.3s ease;
    white-space: nowrap; 
}
#question-area span { display: inline-block; margin: 0 0.05em; } 
#question-area .equals-sign { color: #E64A19; }
#question-area .question-mark { color: #1976D2; animation: questionMarkPulse 1.5s infinite; }

@keyframes questionMarkPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2) rotate(5deg); }
}

#stars-in-play-display {
    font-size: clamp(1.5rem, 5vw, 2rem); color: #FFC107; margin-bottom: 8px; 
    text-shadow: 1px 1px 2px rgba(0,0,0,0.2); transform: translateZ(8px);
}

#options-area {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px;
    width: 90%; max-width: 360px; margin: 0 auto 8px auto; 
}
#options-area button {
    padding: 15px 8px; font-size: clamp(1.6rem, 6vw, 2.2rem); font-weight: bold;
    color: white; border: none; border-radius: 15px; cursor: pointer;
    background: linear-gradient(to bottom, #81D4FA, #29B6F6);
    box-shadow: 0 6px 0 #0288D1, 0 8px 10px rgba(0,0,0,0.25);
    transition: all 0.1s ease-out; transform: translateZ(20px) translateY(-3px);
}
#options-area button:hover { transform: translateZ(25px) translateY(-7px); filter: brightness(1.05); }
#options-area button:active {
    transform: translateZ(15px) translateY(0px);
    box-shadow: 0 2px 0 #0288D1, 0 3px 5px rgba(0,0,0,0.2); filter: brightness(0.95);
}
#options-area button.disabled-option {
    background: linear-gradient(to bottom, #BDBDBD, #9E9E9E);
    box-shadow: 0 6px 0 #757575, 0 8px 10px rgba(0,0,0,0.2);
    color: #E0E0E0; cursor: not-allowed; transform: translateZ(15px) translateY(0px);
}
#options-area button.disabled-option:hover { filter: none; }

#drawing-board-container {
    width: 95%; max-width: 400px; 
    margin: 5px auto 5px auto; 
    background-color: #3A3A3A; border: 8px solid #8D6E63;
    border-radius: 10px;
    box-shadow: 0 5px 10px rgba(0,0,0,0.3), inset 0 0 10px rgba(0,0,0,0.2);
    padding: 8px; display: flex; flex-direction: column; align-items: center;
    transform: translateZ(5px); flex-shrink: 0; 
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

#chalkboard-operation-display {
    font-family: 'Chalkduster', 'Comic Sans MS', cursive;
    font-size: clamp(1.8rem, 6vw, 2.5rem);
    line-height: 1.25;
    color: #FFFDE7; text-align: center; margin-bottom: 5px;
    padding: 5px; width: 100%; min-height: 50px;
    white-space: pre;
}

#drawing-canvas {
    width: 100%; 
    height: 100px; 
    background-color: #4A4A4A;
    border-radius: 5px; cursor: crosshair; touch-action: none;
}

#drawing-controls {
    display: flex; justify-content: space-around; align-items: center;
    width: 100%; margin-top: 8px; gap: 10px; flex-wrap: wrap;
}
#drawing-controls .control-group { display: flex; align-items: center; gap: 5px; }
#drawing-controls label {
    font-size: clamp(0.75rem, 2.5vw, 0.9rem); color: #FFEBCC;
    transition: color 0.3s ease;
}
#drawing-controls input[type="range"] { width: 80px; cursor: pointer; }
#drawing-controls input[type="color"] {
    width: 30px; height: 30px; border: 1px solid #FFEBCC; border-radius: 4px;
    padding: 2px; background-color: transparent; cursor: pointer;
    transition: border-color 0.3s ease;
}
#clear-canvas-btn {
    padding: 6px 10px; font-size: clamp(0.8rem, 2.8vw, 1rem);
    background-color: #C8E6C9; color: #2E7D32;
    border: none; border-radius: 8px; font-weight: bold; cursor: pointer;
    box-shadow: 0 2px 0 #81C784, 0 3px 4px rgba(0,0,0,0.15);
    transition: all 0.1s ease-out;
}
#clear-canvas-btn:active {
    transform: translateY(1px);
    box-shadow: 0 1px 0 #81C784, 0 1.5px 2px rgba(0,0,0,0.15);
}

#feedback-messages-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none;
    z-index: 200;
}

.feedback-popup {
    font-size: clamp(3.5rem, 15vw, 6rem);
    font-weight: 900;
    padding: 20px 30px;
    border-radius: 25px;
    text-transform: uppercase;
    color: white;
    text-shadow: 0 0 5px #fff, 0 0 10px #fff, 0px 2px 2px rgba(0,0,0,0.3), 0px 4px 4px rgba(0,0,0,0.3), 0px 6px 6px rgba(0,0,0,0.3), 0px 8px 15px rgba(0,0,0,0.5);
    box-shadow: 0 10px 20px rgba(0,0,0,0.3), inset 0 0 15px rgba(255,255,255,0.2);
    transform-style: preserve-3d;
    pointer-events: auto;
    opacity: 0;
    animation: feedbackPopIn 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55) forwards,
               feedbackStay 1s 0.3s linear forwards,
               feedbackPopOut 0.3s 1.3s cubic-bezier(0.6, -0.28, 0.74, 0.05) forwards;
}

.feedback-popup.hidden {
    animation: none;
}


#feedback-excelente {
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
    transform: rotateZ(3deg) translateZ(50px) scale(0.5);
    --final-rotation: 3deg;
}

#feedback-ups {
    background: linear-gradient(135deg, #F44336, #C62828);
    transform: rotateZ(-5deg) translateZ(50px) scale(0.5);
    --final-rotation: -5deg;
}

@keyframes feedbackPopIn {
    from {
        opacity: 0;
        transform: scale(0.5) translateZ(50px) rotateZ(0deg);
    }
    to {
        opacity: 1;
        transform: scale(1) translateZ(50px) rotateZ(var(--final-rotation, 0deg));
    }
}

@keyframes feedbackStay {
    from { opacity: 1; }
    to   { opacity: 1; }
}

@keyframes feedbackPopOut {
    from {
        opacity: 1;
        transform: scale(1) translateZ(50px) rotateZ(var(--final-rotation, 0deg));
    }
    to {
        opacity: 0;
        transform: scale(0.7) translateZ(20px) rotateZ(0deg);
    }
}


#confetti-container, #congrats-confetti-container {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    overflow: hidden; pointer-events: none; z-index: 190;
}
#congrats-modal #congrats-confetti-container { z-index: 1; }

.confetti-particle {
    position: absolute; width: 10px; height: 10px; border-radius: 2px;
    opacity: 0; animation: fall 3s ease-out forwards;
}
@keyframes fall {
    0% { opacity: 1; transform: translateY(-20vh) rotateZ(0deg) rotateX(0deg); }
    100% { opacity: 0; transform: translateY(120vh) rotateZ(720deg) rotateX(360deg); }
}

#progress-text {
    font-size: clamp(1.1rem, 3.5vw, 1.4rem); font-weight: bold; color: #546E7A;
    margin-top: auto; 
    margin-bottom: 5px; 
    transform: translateZ(5px);
    transition: color 0.3s ease;
    padding-top: 5px; 
}

#congrats-modal { 
    justify-content: center; 
    align-items: center; 
}
#congrats-modal > * { 
    text-align: center; 
}
#congrats-modal h2 { 
    padding-left: 10px; 
    padding-right: 10px; 
    margin-top: 0; 
    margin-bottom: 15px;
    width: 100%; 
    box-sizing: border-box;
}

#congrats-title {
    font-size: clamp(2rem, 8vw, 3rem); color: #FF6F00; 
    text-shadow: 1px 1px 0 #FFF, 2px 2px 0 #FFCA28, 3px 3px 5px rgba(0,0,0,0.25);
    animation: titlePop 0.6s ease-out, titleWave 4s 0.6s ease-in-out infinite alternate;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}
#congrats-message {
    font-size: clamp(1rem, 3.5vw, 1.3rem); color: #37474F; margin-bottom: 15px;
    transition: color 0.3s ease;
}
#level-stars-earned {
    font-size: clamp(1.3rem, 5vw, 1.8rem); font-weight: bold; color: #E65100; margin-bottom: 20px;
    transition: color 0.3s ease;
}
#continue-from-congrats-btn { 
    margin-top: 15px; 
}

/* --- ESTILOS COMPARTIDOS PARA CONTENEDORES DE JUEGOS (IFRAME) --- */
/* NUEVO: Se agrupan los selectores para aplicar los mismos estilos de pantalla completa */
#mathtris-game-wrapper,
#memory-game-wrapper,
#world-rush-game-wrapper { /* Añadido #world-rush-game-wrapper */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color); /* Usa el color de fondo del tema actual del juego principal */
    z-index: 10002; /* Encima de otros elementos del juego principal */
    display: flex; 
    flex-direction: column;
    align-items: center;
    justify-content: center; 
    padding: 0; 
    box-sizing: border-box;
    overflow: hidden; 
}

/* NUEVO: Se agrupan los selectores para aplicar los mismos estilos a los iframes */
#mathtris-iframe,
#memory-iframe,
#world-rush-iframe { /* Añadido #world-rush-iframe */
    width: 100%;
    height: 100%; 
    border: none;
    background-color: transparent; 
}


/* === ESTILOS MODO OSCURO === */
body.dark-mode {
    background: linear-gradient(160deg, #2c1e1a, #3c2823, #4d332c);
    color: #E0E0E0;
}

body.dark-mode #start-screen { background: inherit; }

body.dark-mode #toggle-theme-btn {
    background: linear-gradient(145deg, #4A4E69, #2C2F33); color: #EAEAEA;
    box-shadow: 0 3px 0 #1E2124, 0 5px 7px rgba(0,0,0,0.4);
}
body.dark-mode #toggle-theme-btn:active { box-shadow: 0 1.5px 0 #1E2124, 0 2px 4px rgba(0,0,0,0.4); }

body.dark-mode #install-pwa-button {
    background: linear-gradient(145deg, #7986cb, #5c6bc0); 
    color: #e8eaf6; 
    box-shadow: 0 3px 0 #3949ab, 0 5px 7px rgba(0,0,0,0.4);
}
body.dark-mode #install-pwa-button:active { box-shadow: 0 1.5px 0 #3949ab, 0 2px 4px rgba(0,0,0,0.4); }


body.dark-mode #main-menu,
body.dark-mode .selection-modal,
body.dark-mode #game-screen {
    background: rgba(45, 45, 55, 0.97);
    box-shadow:
        0 15px 30px rgba(0, 0, 0, 0.5), 0 7px 12px rgba(0, 0, 0, 0.4),
        inset 0 -6px 10px rgba(0, 0, 0, 0.2), inset 0 4px 8px rgba(255, 255, 255, 0.05);
}

body.dark-mode #main-title {
    color: #FF8A65;
    text-shadow:
      1px 1px 0 #424242, -1px -1px 0 #A13B24, 1px -1px 0 #A13B24, -1px 1px 0 #A13B24,
      1.5px 1.5px 0px #A13B24, 2.5px 2.5px 0px #7F261A, 3.5px 3.5px 0px #7F261A,
      4px 4px 6px rgba(0,0,0,0.6);
}

body.dark-mode .bubble { background-color: #4A3F35; border-color: #A1887F; }
body.dark-mode .bubble::before { border-color: transparent #A1887F transparent transparent; }
body.dark-mode .bubble::after { border-color: transparent #4A3F35 transparent transparent; }
body.dark-mode .bubble p { color: #FFCCBC; }

/* Estilos de modo oscuro para la clase compartida */
body.dark-mode .other-game-app-icon { /* CAMBIO DE ID A CLASE */
    border-color: #545454; 
    box-shadow: 0 3px 0 rgba(0,0,0,0.3), 0 5px 7px rgba(0,0,0,0.35);
}
body.dark-mode .other-game-app-icon:hover { /* CAMBIO DE ID A CLASE */
    box-shadow: 0 4px 0 rgba(0,0,0,0.3), 0 7px 9px rgba(0,0,0,0.4);
}
body.dark-mode .other-game-app-icon:active { /* CAMBIO DE ID A CLASE */
    box-shadow: 0 2px 0 rgba(0,0,0,0.3), 0 3px 5px rgba(0,0,0,0.35);
}

body.dark-mode #total-stars-display { color: #FFB74D; background-color: #4A3F35; border-color: #A1887F; }

body.dark-mode .decorations span:nth-child(4) { color: #423106; }


body.dark-mode #toggle-music-btn {
    background: linear-gradient(145deg, #546E7A, #37474F); color: #CFD8DC;
    box-shadow: 0 3px 0 #263238, 0 5px 7px rgba(0,0,0,0.4);
}
body.dark-mode #toggle-music-btn:hover { background: linear-gradient(145deg, #607D8B, #455A64); }
body.dark-mode #toggle-music-btn:active {
    box-shadow: 0 1.5px 0 #263238, 0 2px 4px rgba(0,0,0,0.4);
    background: linear-gradient(145deg, #37474F, #263238);
}

body.dark-mode .selection-modal h2 {
    color: #FFB74D;
    text-shadow: 1px 1px 0 #4A3F35, 2px 2px 0 #A1887F, 3px 3px 5px rgba(0,0,0,0.5);
}

body.dark-mode #operation-title-game {
    color: #FF8A65; text-shadow: 1px 1px 0 #4A3F35, 2px 2px 3px rgba(0,0,0,0.3);
}
body.dark-mode #question-area {
    color: #E0E0E0;
    text-shadow: 2px 2px 0px #546E7A, 4px 4px 0px #37474F, 6px 6px 8px rgba(0,0,0,0.4);
    background: rgba(60, 60, 70, 0.3);
}
body.dark-mode #question-area .equals-sign { color: #FF8A65; }
body.dark-mode #question-area .question-mark { color: #81D4FA; }

body.dark-mode #drawing-board-container { background-color: #2A2A2A; border-color: #6D4C41; }
body.dark-mode #chalkboard-operation-display { color: #FFF59D; }
body.dark-mode #drawing-canvas { background-color: #383838; }
body.dark-mode #drawing-controls label { color: #FFD180; }
body.dark-mode #drawing-controls input[type="color"] { border-color: #FFD180; }
body.dark-mode #clear-canvas-btn {
    background-color: #A5D6A7; color: #1B5E20;
    box-shadow: 0 2px 0 #66BB6A, 0 3px 4px rgba(0,0,0,0.3);
}
body.dark-mode #clear-canvas-btn:active { box-shadow: 0 1px 0 #66BB6A, 0 1.5px 2px rgba(0,0,0,0.3); }

body.dark-mode #progress-text { color: #B0BEC5; }

body.dark-mode #congrats-title {
    color: #FFB74D; text-shadow: 1px 1px 0 #424242, 2px 2px 0 #F57C00, 3px 3px 5px rgba(0,0,0,0.5);
}
body.dark-mode #congrats-message { color: #CFD8DC; }
body.dark-mode #level-stars-earned { color: #FFB74D; }


/* Media Queries */
@media (max-height: 750px) {
    #main-menu { justify-content: space-around; } 
    #drawing-canvas { height: 100px; }
    #question-area { font-size: clamp(2.5rem, 9vw, 3.5rem); padding: 8px 6px; margin-bottom: 8px; }
    #options-area button { padding: 12px 6px; font-size: clamp(1.4rem, 5vw, 2rem); }
    #operation-title-game { margin-bottom: 8px; font-size: clamp(1.5rem, 5vw, 2rem); } 
    #stars-in-play-display { margin-bottom: 8px; }
    #drawing-board-container { margin: 3px auto 3px auto; }
    #chalkboard-operation-display { font-size: clamp(1.6rem, 5.5vw, 2.3rem); min-height: 45px;}
    #drawing-controls { margin-top: 5px; }
    #progress-text { margin-top: 5px; font-size: clamp(1rem, 3vw, 1.2rem); }
    #back-to-menu-game { padding: 12px; font-size: clamp(1.1rem, 3.8vw, 1.4rem); margin-top: 3px; margin-bottom: 5px;}
    .menu-buttons {
        margin-bottom: 15px; 
    }
    #install-pwa-button { margin: 5px auto; } 
    /* Ajuste para los íconos de otros juegos */
    .other-game-app-icon { width: 50px; height: 50px; border-radius: 10px; } /* CAMBIO DE ID A CLASE */
}

@media (max-height: 640px) {
    #main-menu { justify-content: space-around; padding-top: 5px; padding-bottom: 3px; } 
    #main-title { font-size: clamp(2rem, 7vw, 3.1rem); margin: 5px auto 3px auto; padding-top: 45px; margin-top: -30px;}
    #avatar-img { width: 55px; height: 55px; }
    .bubble p { font-size: clamp(0.65rem, 2.4vw, 0.8rem); line-height: 1.2;}
    .bubble { padding: 5px 9px; max-width: 180px;}
    #guia-avatar { gap: 5px; margin: 2px auto 3px auto; padding: 2px;}
    
    /* Ajuste para la sección de otros juegos */
    #other-games-section { margin: 4px auto 2px auto; gap: 8px; } /* Ajuste de gap */
    .other-game-app-icon { width: 44px; height: 44px; border-radius: 8px; } /* CAMBIO DE ID A CLASE */

    #total-stars-display { font-size: clamp(0.9rem, 3vw, 1.1rem); margin: 2px auto 3px auto;}
    
    #install-pwa-button { 
        padding: 6px 10px; 
        font-size: clamp(0.8rem, 2.8vw, 1rem); 
        max-width: 180px; 
        border-radius: 12px;
        box-shadow: 0 3px 0 #d6603c, 0 4px 6px rgba(0,0,0,0.25),
                inset 0 -2px 3px rgba(0,0,0,0.1), inset 0 2px 3px rgba(255,255,255,0.2);
        margin: 4px auto 5px auto;
    }
     #install-pwa-button .install-icon {
        margin-right: 4px;
        font-size: 1em; 
    }
    body.dark-mode #install-pwa-button {
        box-shadow: 0 3px 0 #3949ab, 0 4px 6px rgba(0,0,0,0.4);
    }


    .decorations span { font-size: clamp(1.2rem, 3.8vw, 1.7rem); padding: 3px 6px; border-radius: 6px;}
    .decorations { margin: 3px 0 4px 0; gap: 4px; }
    .menu-buttons {
        gap: 4px;
        margin-top: 4px; 
        margin-bottom: 12px; 
    }
    .menu-buttons button {
        padding: 6px 9px; font-size: clamp(1rem, 3.3vw, 1.25rem); border-radius: 10px;
        max-width: 200px; 
    }
    .menu-buttons button .op-icon { font-size: 0.75em; margin-right: 4px; padding: 1.5px 3.5px; border-radius: 4px;}
    #toggle-music-btn, #toggle-theme-btn { width: 38px; height: 38px; font-size: 1.1em; top: 8px; }
    #toggle-music-btn { right: 8px; }
    #toggle-theme-btn { left: 8px; }

    .selection-buttons { margin-bottom: 10px; }
    .range-buttons-column button, .table-grid button,
    .back-to-main-menu-button, #back-to-menu-game, #continue-from-congrats-btn {
        padding: 10px; font-size: clamp(1.1rem, 3.8vw, 1.4rem);
    }
    .back-to-main-menu-button, #back-to-menu-game, #continue-from-congrats-btn {
        margin-top: 3px; margin-bottom: 5px;
    }
    
    #operation-title-game { font-size: clamp(1.4rem, 4.5vw, 1.8rem); margin-bottom: 5px; padding-left: 45px; padding-right: 45px; margin-top: 3px;}
    #question-area { font-size: clamp(2rem, 8vw, 3rem); padding: 6px 4px; margin-bottom: 5px; }
    #stars-in-play-display { font-size: clamp(1.2rem, 4vw, 1.6rem); margin-bottom: 5px; }
    #options-area { margin: 0 auto 5px auto; gap: 6px; }
    #options-area button { padding: 10px 5px; font-size: clamp(1.2rem, 4.5vw, 1.8rem); }

    #drawing-board-container { margin: 2px auto 2px auto; padding: 5px; border-width: 5px;}
    #chalkboard-operation-display { font-size: clamp(1.5rem, 5vw, 2.1rem); min-height: 40px;}
    #drawing-canvas { height: 70px; } 
    #drawing-controls { margin-top: 4px; gap: 5px; }
    #drawing-controls label { font-size: clamp(0.6rem, 2vw, 0.75rem); }
    #drawing-controls input[type="range"] { width: 60px; }
    #clear-canvas-btn { padding: 4px 8px; font-size: clamp(0.7rem, 2.2vw, 0.8rem); }
    
    #progress-text { margin-top: 3px; margin-bottom: 3px; font-size: clamp(0.9rem, 2.8vw, 1.1rem); }
    #back-to-menu-game { padding: 8px; font-size: clamp(1rem, 3.5vw, 1.3rem); } 
}

@media (min-height: 641px) and (max-height: 720px) {
    #main-menu { justify-content: space-around; padding-bottom: 4px; } 
    #main-title { font-size: clamp(2.1rem, 7.8vw, 3.4rem); margin-top: 8px; padding-top: 50px; margin-top: -35px;}
    #avatar-img { width: 65px; height: 65px; }
    #total-stars-display { font-size: clamp(1rem, 3.2vw, 1.25rem); }
    .bubble { padding: 7px 11px; max-width: 200px; }
    .decorations span { font-size: clamp(1.35rem, 4.2vw, 1.9rem); }
    .decorations { margin: 5px 0 6px 0; }
    .menu-buttons {
        gap: 6px;
        margin-top: 6px; 
        margin-bottom: 15px; 
    }
    .menu-buttons button { padding: 8px 12px; font-size: clamp(1.1rem, 3.8vw, 1.4rem); max-width: 220px; }
    #toggle-music-btn, #toggle-theme-btn { width: 42px; height: 42px; font-size: 1.3em; top: 10px;}
    #toggle-music-btn { right: 10px;}
    #toggle-theme-btn { left: 10px; }
    
    /* Ajuste para la sección de otros juegos */
    #other-games-section { margin: 6px auto 4px auto; gap: 12px; } /* Ajuste de gap */
    .other-game-app-icon { width: 54px; height: 54px; } /* CAMBIO DE ID A CLASE */

    #install-pwa-button { 
        padding: 7px 12px;
        font-size: clamp(0.85rem, 3vw, 1.1rem);
        max-width: 200px; 
        margin: 5px auto 8px auto;
    }
     #install-pwa-button .install-icon {
        margin-right: 5px;
        font-size: 1.05em; 
    }

    .selection-buttons { margin-bottom: 12px; }
    .range-buttons-column button, .table-grid button,
    .back-to-main-menu-button, #back-to-menu-game, #continue-from-congrats-btn {
        padding: 12px; font-size: clamp(1.2rem, 4vw, 1.5rem);
    }
    .back-to-main-menu-button, #back-to-menu-game, #continue-from-congrats-btn {
        margin-top: 4px; margin-bottom: 6px;
    }

    #operation-title-game { font-size: clamp(1.5rem, 5vw, 2rem); padding-left: 50px; padding-right: 50px; line-height: 1.2;}
    #question-area { font-size: clamp(2.2rem, 8.5vw, 3.2rem); }
    #stars-in-play-display { font-size: clamp(1.3rem, 4.5vw, 1.8rem); }
    #options-area { margin: 0 auto 8px auto; }
    #options-area button { font-size: clamp(1.3rem, 5vw, 1.9rem); }
    #chalkboard-operation-display { font-size: clamp(1.7rem, 5.8vw, 2.4rem); min-height: 48px;}

    #drawing-canvas { height: 80px; } 
    #progress-text { margin-top: 6px; margin-bottom: 4px; font-size: clamp(1rem, 3.2vw, 1.3rem); }
     #back-to-menu-game { padding: 10px; font-size: clamp(1.1rem, 3.8vw, 1.4rem); }
}

body.dark-mode #install-pwa-button {
    background: linear-gradient(145deg, #7986cb, #5c6bc0); 
    color: #e8eaf6; 
    box-shadow: 0 3px 0 #3949ab, 0 5px 7px rgba(0,0,0,0.4);
}
body.dark-mode #install-pwa-button:active { box-shadow: 0 1.5px 0 #3949ab, 0 2px 4px rgba(0,0,0,0.4); }

@media (max-height: 640px) {
    body.dark-mode #install-pwa-button {
        box-shadow: 0 3px 0 #3949ab, 0 4px 6px rgba(0,0,0,0.4);
    }
}