/* =========================================
   VARIABLES Y CONFIGURACIÓN DE TEMAS
   ========================================= */
:root {
    --f-titulo: 2.2rem;
    --f-pregunta: 1.5rem;
    --f-opciones: 1rem;
    --f-marcador: 1rem;

    --blanco-vidrio: rgba(255, 255, 255, 0.08);
    --borde-vidrio: rgba(255, 255, 255, 0.18);

    --dorado: #f5c76a;
    --verde-exito: #5fa97a;
    --rojo-error: #fb7185;

    /* Colores por defecto (Fácil - Azul) */
    --color-principal: #3b82f6;   
    --color-oscuro: #0b1a3a;
    --color-fondo: #060c1a;
}

body[data-tema="facil"] {
    --color-principal: #3b82f6;
    --color-oscuro: #0b1a3a;
    --color-fondo: #060c1a;
}

body[data-tema="intermedio"] {
    --color-principal: #8b5cf6;
    --color-oscuro: #1e0a3c;
    --color-fondo: #140826;
}

body[data-tema="dificil"] {
    --color-principal: #ef4444;
    --color-oscuro: #3a0b0b;
    --color-fondo: #1a0606;
}

/* =========================================
   ESTRUCTURA BASE Y SCROLL (CORREGIDO)
   ========================================= */
body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--color-oscuro), var(--color-fondo));
    min-height: 100vh; /* Permite que el fondo crezca en celular */
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    overflow-x: hidden;
    overflow-y: auto;   /* Habilita scroll vertical si el contenido no cabe */
    padding: 20px 0;
    transition: all 0.5s ease;
    box-sizing: border-box;
}

/* =========================================
   FONDO ANIMADO (CUADROS)
   ========================================= */
.capa-fondo {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 20%, var(--color-principal) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, var(--color-oscuro) 0%, transparent 40%);
    opacity: 0.2;
    z-index: -1;
}

.rotating-box {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 1;
    margin: 0; padding: 0;
}

.rotating-box li {
    position: absolute;
    list-style: none;
    display: block;
    width: 40px; height: 40px;
    border-radius: 18%;
    background-color: rgba(255,255,255,0.10);
    bottom: -160px;
    animation: square 25s infinite linear;
}

/* Variaciones de los cuadros */
.rotating-box li:nth-child(1) { left: 10%; }
.rotating-box li:nth-child(2) { left: 20%; width: 80px; height: 80px; animation-delay: 2s; animation-duration: 17s; }
.rotating-box li:nth-child(3) { left: 25%; animation-delay: 4s; }
.rotating-box li:nth-child(4) { left: 40%; width: 60px; height: 60px; animation-duration: 22s; background-color: rgba(255,255,255,0.25); }
.rotating-box li:nth-child(5) { left: 70%; }
.rotating-box li:nth-child(6) { left: 80%; width: 100px; height: 100px; animation-delay: 3s; background-color: rgba(255,255,255,0.2); }
.rotating-box li:nth-child(7) { left: 32%; width: 80px; height: 80px; animation-delay: 7s; }
.rotating-box li:nth-child(8) { left: 55%; width: 20px; height: 20px; animation-delay: 15s; animation-duration: 40s; }
.rotating-box li:nth-child(9) { left: 25%; width: 10px; height: 10px; animation-delay: 2s; animation-duration: 40s; background-color: rgba(255,255,255,0.3); }
.rotating-box li:nth-child(10) { left: 90%; width: 80px; height: 80px; animation-delay: 11s; }

@keyframes square {
    0% { transform: translateY(0) rotate(0deg); opacity: 1; }
    100% { transform: translateY(-100vh) rotate(600deg); opacity: 0; }
}

/* =========================================
   CONTENEDOR Y TARJETA DE VIDRIO
   ========================================= */
.contenedor-principal {
    width: 95%;
    max-width: 750px;
    z-index: 2;
    position: relative;
}

.tarjeta-vidrio {
    background: var(--blanco-vidrio);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--borde-vidrio);
    border-radius: 30px;
    padding: 40px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    text-align: center;
}

.oculto { display: none !important; }

h1 {
    font-size: var(--f-titulo);
    text-transform: uppercase;
    letter-spacing: 4px;
    margin: 0 0 10px 0;
    background: linear-gradient(to right, #fff, var(--color-principal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
}

.subtitulo {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 25px;
    font-size: 0.9rem;
}

/* =========================================
   CABECERA Y MARCADOR
   ========================================= */
.info-superior {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.badge-info {
    background: rgba(0, 0, 0, 0.3);
    padding: 5px 15px;
    border-radius: 20px;
    border: 1px solid var(--borde-vidrio);
    font-size: 0.95rem;
    color: var(--dorado);
    font-weight: bold;
}

.marcador-leaderboard {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 25px;
}

.bloque-equipo {
    background: rgba(0, 0, 0, 0.3);
    padding: 12px 18px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    border: 2px solid transparent;
    transition: 0.4s;
    font-size: var(--f-marcador);
}

.bloque-equipo.activo {
    border-color: var(--color-principal);
    background: rgba(251, 207, 69, 0.1);
    animation: borde-neon 1.5s infinite alternate;
}

@keyframes borde-neon {
    0% { box-shadow: 0 0 5px var(--color-principal), inset 0 0 5px var(--color-principal); }
    100% { box-shadow: 0 0 20px var(--color-principal), inset 0 0 10px var(--color-principal); }
}

.bloque-equipo.eliminado {
    opacity: 0.15;
    filter: grayscale(1);
    transform: scale(0.95);
}

.posicion {
    background: var(--color-principal);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    margin-right: 12px;
    font-size: 0.85rem;
    color: white;
}

.puntos {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--dorado);
    margin-left: auto;
}

/* =========================================
   RELOJ Y TEMPORIZADOR
   ========================================= */
.contenedor-timer {
    position: relative;
    width: 75px;
    height: 75px;
    margin: 0 auto 25px;
}

.timer-svg { transform: rotate(-90deg); }
.timer-fondo { fill: none; stroke: rgba(255, 255, 255, 0.05); stroke-width: 8; }
.timer-barra {
    fill: none;
    stroke: var(--color-principal);
    stroke-width: 8;
    stroke-dasharray: 283;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear;
}

#timer-texto {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 900;
    font-size: 1.2rem;
    transition: color 0.3s;
}

.latido-urgente #timer-texto {
    color: var(--rojo-error);
    animation: latido 0.8s infinite;
}

.latido-urgente .timer-barra {
    stroke: var(--rojo-error) !important;
}

@keyframes latido {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.3); }
}

/* =========================================
   PREGUNTA Y MÁQUINA DE ESCRIBIR
   ========================================= */
.indicador-turno {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 5px;
}

#texto-pregunta {
    font-size: var(--f-pregunta);
    margin-bottom: 25px;
    min-height: 60px;
    line-height: 1.4;
    font-weight: 700;
}

.escribiendo {
    overflow: hidden;
    white-space: pre-wrap;
    animation: typewriter 0.5s steps(40, end);
}

@keyframes typewriter {
    from { width: 0; opacity: 0; }
    to { width: 100%; opacity: 1; }
}

/* =========================================
   BOTONES Y EFECTOS 3D
   ========================================= */
.rejilla-opciones {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.opcion-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--borde-vidrio);
    padding: 18px;
    border-radius: 15px;
    color: white;
    cursor: pointer;
    font-size: var(--f-opciones);
    transition: all 0.2s ease;
    box-shadow: 0 5px 0 rgba(0,0,0,0.4); 
    transform: translateY(0);
}

.opcion-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.15);
    transform: perspective(500px) rotateX(5deg) translateY(-2px);
    box-shadow: 0 7px 15px rgba(0,0,0,0.5), 0 5px 0 rgba(0,0,0,0.4);
}

.opcion-btn:active:not(:disabled) {
    transform: translateY(4px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.4);
}

.btn-principal {
    background: var(--color-principal);
    color: white;
    border: none;
    padding: 18px 35px;
    border-radius: 50px;
    font-weight: bold;
    cursor: pointer;
    width: 100%;
    transition: all 0.2s ease;
    box-shadow: 0 6px 0 rgba(0,0,0,0.5), 0 15px 20px rgba(0, 0, 0, 0.3);
}

.btn-principal:active {
    transform: translateY(6px);
    box-shadow: 0 0px 0 rgba(0,0,0,0.5), 0 5px 10px rgba(0, 0, 0, 0.3);
}

.btn-accion {
    padding: 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: bold;
    cursor: pointer;
    text-transform: uppercase;
    border: 1px solid var(--borde-vidrio);
    background: rgba(255, 255, 255, 0.08);
    color: white;
    flex: 1;
    transition: all 0.2s;
    box-shadow: 0 4px 0 rgba(0,0,0,0.4);
}

.btn-accion:hover:not(:disabled) {
    background: white;
    color: black;
    transform: translateY(-2px);
    box-shadow: 0 6px 0 rgba(0,0,0,0.4);
}

.btn-accion:active:not(:disabled) {
    transform: translateY(4px);
    box-shadow: 0 0 0 rgba(0,0,0,0.4);
}

.btn-continuar {
    background: #fff;
    color: #000;
    border: none;
    width: 100%;
    flex: none;
    padding: 15px;
}

.btn-accion:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
    box-shadow: none;
    transform: none;
}

.controles-extra {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 30px;
}

.botones-fila { display: flex; gap: 15px; width: 100%; }

.opcion-btn.correcta-reveal { background: var(--verde-exito) !important; border-color: #fff !important; font-weight: bold; box-shadow: 0 0 15px var(--verde-exito), 0 5px 0 rgba(0,0,0,0.5) !important; }
.opcion-btn.incorrecta-reveal { background: var(--rojo-error) !important; border-color: #fff !important; opacity: 1 !important; box-shadow: 0 0 10px var(--rojo-error), 0 5px 0 rgba(0,0,0,0.5) !important; }

/* =========================================
   REGISTRO Y MODOS
   ========================================= */
.grupo-registro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 20px;
}

.input-equipo {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--borde-vidrio);
    border-radius: 12px;
    padding: 14px;
    color: white;
    font-size: 1rem;
    outline: none;
    transition: 0.3s;
}

.input-equipo:focus { border-color: var(--color-principal); background: rgba(0, 0, 0, 0.6); }

.ajustes-juego {
    display: flex;
    gap: 15px;
    margin: 20px 0 30px 0;
}

.btn-modo {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 18px;
    padding: 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    opacity: 0.4;
    filter: grayscale(1);
    box-shadow: 0 4px 0 rgba(0,0,0,0.3);
}

.btn-modo:active { transform: translateY(4px); box-shadow: none; }

.btn-modo.activo {
    filter: grayscale(0); opacity: 1;
    border-color: var(--color-principal);
    background: rgba(218, 24, 51, 0.5);
    box-shadow: 0 0 20px var(--color-principal);
}

.icono-modo { font-size: 1.8rem; }
.texto-modo { display: flex; flex-direction: column; text-align: left; }
.titulo-modo { font-weight: 900; font-size: 0.85rem; color: white; }
.sub-modo { font-size: 0.65rem; color: rgba(255, 255, 255, 0.7); }

/* =========================================
   FLASH Y GLITCH (FEEDBACK)
   ========================================= */
.flash-correcto { animation: flash-v 0.8s ease; }
.flash-incorrecto { animation: flash-r 0.8s ease, glitch-anim 0.3s cubic-bezier(.25, .46, .45, .94) both; }

@keyframes flash-v { 50% { box-shadow: 0 0 60px var(--verde-exito); border-color: var(--verde-exito); } }
@keyframes flash-r { 50% { box-shadow: 0 0 60px var(--rojo-error); border-color: var(--rojo-error); } }

@keyframes glitch-anim {
    0% { transform: translate(0) }
    20% { transform: translate(-5px, 5px) }
    40% { transform: translate(-5px, -5px) }
    60% { transform: translate(5px, 5px) }
    80% { transform: translate(5px, -5px) }
    100% { transform: translate(0) }
}

.resultado-destacado {
    font-size: 1.8rem;
    margin: 30px 0;
    color: var(--dorado);
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

/* =========================================
   CRÉDITOS
   ========================================= */
.creditos {
    position: fixed; 
    bottom: 15px;
    left: 0;
    width: 100%;   
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.3);
    text-align: center;
    letter-spacing: 2px;
    z-index: 100;   
    pointer-events: auto;
    transition: all 0.3s ease;
}

.creditos:hover {
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 0 10px var(--color-principal);
    bottom: 18px;
}

/* =========================================
   RESPONSIVIDAD TOTAL (CORREGIDO PARA MÓVIL)
   ========================================= */
/* =========================================
   VARIABLES Y CONFIGURACIÓN DE TEMAS
   ========================================= */
:root {
    --f-titulo: 2.2rem;
    --f-pregunta: 1.5rem;
    --f-opciones: 1rem;
    --f-marcador: 1rem;

    --blanco-vidrio: rgba(255, 255, 255, 0.08);
    --borde-vidrio: rgba(255, 255, 255, 0.18);

    --dorado: #f5c76a;
    --verde-exito: #5fa97a;
    --rojo-error: #fb7185;

    /* Colores por defecto (Fácil - Azul) */
    --color-principal: #3b82f6;   
    --color-oscuro: #0b1a3a;
    --color-fondo: #060c1a;
}

body[data-tema="facil"] {
    --color-principal: #3b82f6;
    --color-oscuro: #0b1a3a;
    --color-fondo: #060c1a;
}

body[data-tema="intermedio"] {
    --color-principal: #8b5cf6;
    --color-oscuro: #1e0a3c;
    --color-fondo: #140826;
}

body[data-tema="dificil"] {
    --color-principal: #ef4444;
    --color-oscuro: #3a0b0b;
    --color-fondo: #1a0606;
}

/* =========================================
   ESTRUCTURA BASE Y SCROLL (CORREGIDO)
   ========================================= */
body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--color-oscuro), var(--color-fondo));
    min-height: 100vh; /* Permite que el fondo crezca en celular */
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    overflow-x: hidden;
    overflow-y: auto;   /* Habilita scroll vertical si el contenido no cabe */
    padding: 20px 0;
    transition: all 0.5s ease;
    box-sizing: border-box;
}

/* =========================================
   FONDO ANIMADO (CUADROS)
   ========================================= */
.capa-fondo {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 20%, var(--color-principal) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, var(--color-oscuro) 0%, transparent 40%);
    opacity: 0.2;
    z-index: -1;
}

.rotating-box {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 1;
    margin: 0; padding: 0;
}

.rotating-box li {
    position: absolute;
    list-style: none;
    display: block;
    width: 40px; height: 40px;
    border-radius: 18%;
    background-color: rgba(255,255,255,0.10);
    bottom: -160px;
    animation: square 25s infinite linear;
}

/* Variaciones de los cuadros */
.rotating-box li:nth-child(1) { left: 10%; }
.rotating-box li:nth-child(2) { left: 20%; width: 80px; height: 80px; animation-delay: 2s; animation-duration: 17s; }
.rotating-box li:nth-child(3) { left: 25%; animation-delay: 4s; }
.rotating-box li:nth-child(4) { left: 40%; width: 60px; height: 60px; animation-duration: 22s; background-color: rgba(255,255,255,0.25); }
.rotating-box li:nth-child(5) { left: 70%; }
.rotating-box li:nth-child(6) { left: 80%; width: 100px; height: 100px; animation-delay: 3s; background-color: rgba(255,255,255,0.2); }
.rotating-box li:nth-child(7) { left: 32%; width: 80px; height: 80px; animation-delay: 7s; }
.rotating-box li:nth-child(8) { left: 55%; width: 20px; height: 20px; animation-delay: 15s; animation-duration: 40s; }
.rotating-box li:nth-child(9) { left: 25%; width: 10px; height: 10px; animation-delay: 2s; animation-duration: 40s; background-color: rgba(255,255,255,0.3); }
.rotating-box li:nth-child(10) { left: 90%; width: 80px; height: 80px; animation-delay: 11s; }

@keyframes square {
    0% { transform: translateY(0) rotate(0deg); opacity: 1; }
    100% { transform: translateY(-100vh) rotate(600deg); opacity: 0; }
}

/* =========================================
   CONTENEDOR Y TARJETA DE VIDRIO
   ========================================= */
.contenedor-principal {
    width: 95%;
    max-width: 750px;
    z-index: 2;
    position: relative;
}

.tarjeta-vidrio {
    background: var(--blanco-vidrio);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--borde-vidrio);
    border-radius: 30px;
    padding: 40px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    text-align: center;
}

.oculto { display: none !important; }

h1 {
    font-size: var(--f-titulo);
    text-transform: uppercase;
    letter-spacing: 4px;
    margin: 0 0 10px 0;
    background: linear-gradient(to right, #fff, var(--color-principal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
}

.subtitulo {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 25px;
    font-size: 0.9rem;
}

/* =========================================
   CABECERA Y MARCADOR
   ========================================= */
.info-superior {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.badge-info {
    background: rgba(0, 0, 0, 0.3);
    padding: 5px 15px;
    border-radius: 20px;
    border: 1px solid var(--borde-vidrio);
    font-size: 0.95rem;
    color: var(--dorado);
    font-weight: bold;
}

.marcador-leaderboard {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 25px;
}

.bloque-equipo {
    background: rgba(0, 0, 0, 0.3);
    padding: 12px 18px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    border: 2px solid transparent;
    transition: 0.4s;
    font-size: var(--f-marcador);
}

.bloque-equipo.activo {
    border-color: var(--color-principal);
    background: rgba(251, 207, 69, 0.1);
    animation: borde-neon 1.5s infinite alternate;
}

@keyframes borde-neon {
    0% { box-shadow: 0 0 5px var(--color-principal), inset 0 0 5px var(--color-principal); }
    100% { box-shadow: 0 0 20px var(--color-principal), inset 0 0 10px var(--color-principal); }
}

.bloque-equipo.eliminado {
    opacity: 0.15;
    filter: grayscale(1);
    transform: scale(0.95);
}

.posicion {
    background: var(--color-principal);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    margin-right: 12px;
    font-size: 0.85rem;
    color: white;
}

.puntos {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--dorado);
    margin-left: auto;
}

/* =========================================
   RELOJ Y TEMPORIZADOR
   ========================================= */
.contenedor-timer {
    position: relative;
    width: 75px;
    height: 75px;
    margin: 0 auto 25px;
}

.timer-svg { transform: rotate(-90deg); }
.timer-fondo { fill: none; stroke: rgba(255, 255, 255, 0.05); stroke-width: 8; }
.timer-barra {
    fill: none;
    stroke: var(--color-principal);
    stroke-width: 8;
    stroke-dasharray: 283;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear;
}

#timer-texto {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 900;
    font-size: 1.2rem;
    transition: color 0.3s;
}

.latido-urgente #timer-texto {
    color: var(--rojo-error);
    animation: latido 0.8s infinite;
}

.latido-urgente .timer-barra {
    stroke: var(--rojo-error) !important;
}

@keyframes latido {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.3); }
}

/* =========================================
   PREGUNTA Y MÁQUINA DE ESCRIBIR
   ========================================= */
.indicador-turno {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 5px;
}

#texto-pregunta {
    font-size: var(--f-pregunta);
    margin-bottom: 25px;
    min-height: 60px;
    line-height: 1.4;
    font-weight: 700;
}

.escribiendo {
    overflow: hidden;
    white-space: pre-wrap;
    animation: typewriter 0.5s steps(40, end);
}

@keyframes typewriter {
    from { width: 0; opacity: 0; }
    to { width: 100%; opacity: 1; }
}

/* =========================================
   BOTONES Y EFECTOS 3D
   ========================================= */
.rejilla-opciones {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.opcion-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--borde-vidrio);
    padding: 18px;
    border-radius: 15px;
    color: white;
    cursor: pointer;
    font-size: var(--f-opciones);
    transition: all 0.2s ease;
    box-shadow: 0 5px 0 rgba(0,0,0,0.4); 
    transform: translateY(0);
}

.opcion-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.15);
    transform: perspective(500px) rotateX(5deg) translateY(-2px);
    box-shadow: 0 7px 15px rgba(0,0,0,0.5), 0 5px 0 rgba(0,0,0,0.4);
}

.opcion-btn:active:not(:disabled) {
    transform: translateY(4px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.4);
}

.btn-principal {
    background: var(--color-principal);
    color: white;
    border: none;
    padding: 18px 35px;
    border-radius: 50px;
    font-weight: bold;
    cursor: pointer;
    width: 100%;
    transition: all 0.2s ease;
    box-shadow: 0 6px 0 rgba(0,0,0,0.5), 0 15px 20px rgba(0, 0, 0, 0.3);
}

.btn-principal:active {
    transform: translateY(6px);
    box-shadow: 0 0px 0 rgba(0,0,0,0.5), 0 5px 10px rgba(0, 0, 0, 0.3);
}

.btn-accion {
    padding: 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: bold;
    cursor: pointer;
    text-transform: uppercase;
    border: 1px solid var(--borde-vidrio);
    background: rgba(255, 255, 255, 0.08);
    color: white;
    flex: 1;
    transition: all 0.2s;
    box-shadow: 0 4px 0 rgba(0,0,0,0.4);
}

.btn-accion:hover:not(:disabled) {
    background: white;
    color: black;
    transform: translateY(-2px);
    box-shadow: 0 6px 0 rgba(0,0,0,0.4);
}

.btn-accion:active:not(:disabled) {
    transform: translateY(4px);
    box-shadow: 0 0 0 rgba(0,0,0,0.4);
}

.btn-continuar {
    background: #fff;
    color: #000;
    border: none;
    width: 100%;
    flex: none;
    padding: 15px;
}

.btn-accion:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
    box-shadow: none;
    transform: none;
}

.controles-extra {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 30px;
}

.botones-fila { display: flex; gap: 15px; width: 100%; }

.opcion-btn.correcta-reveal { background: var(--verde-exito) !important; border-color: #fff !important; font-weight: bold; box-shadow: 0 0 15px var(--verde-exito), 0 5px 0 rgba(0,0,0,0.5) !important; }
.opcion-btn.incorrecta-reveal { background: var(--rojo-error) !important; border-color: #fff !important; opacity: 1 !important; box-shadow: 0 0 10px var(--rojo-error), 0 5px 0 rgba(0,0,0,0.5) !important; }

/* =========================================
   REGISTRO Y MODOS
   ========================================= */
.grupo-registro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 20px;
}

.input-equipo {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--borde-vidrio);
    border-radius: 12px;
    padding: 14px;
    color: white;
    font-size: 1rem;
    outline: none;
    transition: 0.3s;
}

.input-equipo:focus { border-color: var(--color-principal); background: rgba(0, 0, 0, 0.6); }

.ajustes-juego {
    display: flex;
    gap: 15px;
    margin: 20px 0 30px 0;
}

.btn-modo {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 18px;
    padding: 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    opacity: 0.4;
    filter: grayscale(1);
    box-shadow: 0 4px 0 rgba(0,0,0,0.3);
}

.btn-modo:active { transform: translateY(4px); box-shadow: none; }

.btn-modo.activo {
    filter: grayscale(0); opacity: 1;
    border-color: var(--color-principal);
    background: rgba(218, 24, 51, 0.5);
    box-shadow: 0 0 20px var(--color-principal);
}

.icono-modo { font-size: 1.8rem; }
.texto-modo { display: flex; flex-direction: column; text-align: left; }
.titulo-modo { font-weight: 900; font-size: 0.85rem; color: white; }
.sub-modo { font-size: 0.65rem; color: rgba(255, 255, 255, 0.7); }

/* =========================================
   FLASH Y GLITCH (FEEDBACK)
   ========================================= */
.flash-correcto { animation: flash-v 0.8s ease; }
.flash-incorrecto { animation: flash-r 0.8s ease, glitch-anim 0.3s cubic-bezier(.25, .46, .45, .94) both; }

@keyframes flash-v { 50% { box-shadow: 0 0 60px var(--verde-exito); border-color: var(--verde-exito); } }
@keyframes flash-r { 50% { box-shadow: 0 0 60px var(--rojo-error); border-color: var(--rojo-error); } }

@keyframes glitch-anim {
    0% { transform: translate(0) }
    20% { transform: translate(-5px, 5px) }
    40% { transform: translate(-5px, -5px) }
    60% { transform: translate(5px, 5px) }
    80% { transform: translate(5px, -5px) }
    100% { transform: translate(0) }
}

.resultado-destacado {
    font-size: 1.8rem;
    margin: 30px 0;
    color: var(--dorado);
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

/* =========================================
   CRÉDITOS
   ========================================= */
.creditos {
    position: fixed; 
    bottom: 15px;
    left: 0;
    width: 100%;   
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.3);
    text-align: center;
    letter-spacing: 2px;
    z-index: 100;   
    pointer-events: auto;
    transition: all 0.3s ease;
}

.creditos:hover {
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 0 10px var(--color-principal);
    bottom: 18px;
}

/* =========================================
   RESPONSIVIDAD TOTAL (CORREGIDO PARA MÓVIL)
   ========================================= */
/* =========================================
   RESPONSIVIDAD TOTAL (CORREGIDO PARA MÓVIL)
   ========================================= */
@media (max-width: 600px) {
    /* EL ARREGLO PRINCIPAL ESTÁ AQUÍ */
    body {
        align-items: flex-start; /* Evita que el contenido se salga por arriba */
        padding-top: 30px;       /* Espacio de respiro arriba */
        padding-bottom: 80px;    /* Espacio extra abajo para los créditos */
    }

    :root {
        --f-titulo: 1.6rem;
        --f-pregunta: 1.15rem;
        --f-opciones: 0.9rem;
        --f-marcador: 0.85rem;
    }

    .contenedor-principal { 
        width: 92%; 
        margin: 0 auto; /* Asegura el centrado horizontal */
    }

    .tarjeta-vidrio { 
        padding: 20px; 
        border-radius: 20px; 
    }

    .grupo-registro, .rejilla-opciones, .marcador-leaderboard {
        grid-template-columns: 1fr;
    }

    .info-superior { 
        flex-direction: column; 
        gap: 8px; 
        align-items: center; 
    }

    .badge-info { 
        width: 100%; 
        text-align: center; 
        box-sizing: border-box; 
    }

    .contenedor-timer { 
        width: 60px; 
        height: 60px; 
        margin-bottom: 15px; 
    }

    #timer-texto { 
        font-size: 1rem; 
    }

    .ajustes-juego { 
        flex-direction: column; 
    }

    .btn-modo { 
        padding: 10px; 
    }

    .icono-modo { 
        font-size: 1.4rem; 
    }

    .creditos {
        position: relative;
        margin-top: 20px;
        bottom: 0;
        padding-bottom: 10px;
    }
}