/* =========================================================================
   ACIB · Aprendizaje de Ciberseguridad
   Tema: Dark Cyber (Glassmorphism + Neón animado)
   ========================================================================= */

:root {
    /* Paleta Dark Cyber */
    --bg-void: #0a0a0a;
    --bg-panel: #1a1a1a;
    --bg-panel-alpha: rgba(26, 26, 26, 0.55);
    --glass-border: rgba(0, 255, 140, 0.25);

    --neon-green: #00ff8c;
    --neon-green-soft: rgba(0, 255, 140, 0.45);
    --cyber-blue: #00aaff;
    --cyber-blue-soft: rgba(0, 170, 255, 0.45);

    --text-color: #eafff5;
    --text-muted: #8fa3a0;

    --success: #00ff8c;
    --danger: #ff3366;
    --danger-soft: rgba(255, 51, 102, 0.45);

    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-sm: 8px;

    --blur-glass: 14px;
    --transition-fast: 0.2s ease;
    --transition-med: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    background:
        radial-gradient(circle at 15% 10%, rgba(0, 170, 255, 0.10), transparent 40%),
        radial-gradient(circle at 85% 90%, rgba(0, 255, 140, 0.10), transparent 40%),
        var(--bg-void);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-bottom: 40px;
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
}

::selection {
    background: var(--neon-green);
    color: #04140d;
}

:focus-visible {
    outline: 2px solid var(--cyber-blue);
    outline-offset: 3px;
}

/* =========================================================================
   1. HEADER GLOBAL SIELSICweb — coherencia con la nave nodriza
   ========================================================================= */

.header-sielsic {
    width: 100%;
    background: rgba(10, 10, 10, 0.75);
    backdrop-filter: blur(var(--blur-glass));
    -webkit-backdrop-filter: blur(var(--blur-glass));
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 2px 24px rgba(0, 255, 140, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-contenedor {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo-sielsic {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo-texto {
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--text-color);
    text-shadow: 0 0 10px var(--cyber-blue-soft);
}

.logo-acento {
    color: var(--cyber-blue);
}

.nav-principal .nav-lista {
    list-style: none;
    display: flex;
    gap: 28px;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    position: relative;
    padding-bottom: 4px;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-green), var(--cyber-blue));
    box-shadow: 0 0 8px var(--neon-green-soft);
    transition: width var(--transition-med);
}

.nav-link:hover,
.nav-link:focus-visible {
    color: var(--text-color);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
    width: 100%;
}

.btn-menu-movil {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.btn-menu-movil span {
    width: 24px;
    height: 2px;
    background: var(--neon-green);
    box-shadow: 0 0 6px var(--neon-green-soft);
    border-radius: 2px;
}

/* =========================================================================
   2. CONTENEDOR PRINCIPAL — Glassmorphism
   ========================================================================= */

.app-contenedor {
    width: 100%;
    max-width: 950px;
    padding: 30px 20px;
    display: flex;
    justify-content: center;
}

.pantalla {
    width: 100%;
    background: var(--bg-panel-alpha);
    backdrop-filter: blur(var(--blur-glass));
    -webkit-backdrop-filter: blur(var(--blur-glass));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow:
        0 10px 40px rgba(0, 0, 0, 0.6),
        0 0 30px rgba(0, 255, 140, 0.06) inset;
    text-align: center;
}

.activa { display: block; animation: fadeIn 0.5s ease; }
.oculta { display: none; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* =========================================================================
   3. ENCABEZADO ACIB
   ========================================================================= */

.acib-encabezado {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 18px;
    margin-bottom: 24px;
}

.acib-titulo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.acib-sigla {
    font-size: 2.4rem;
    font-weight: 900;
    letter-spacing: 3px;
    color: var(--neon-green);
    text-shadow:
        0 0 8px var(--neon-green-soft),
        0 0 22px var(--neon-green-soft);
}

.acib-subtitulo {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.btn-ayuda {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--cyber-blue-soft);
    background: rgba(0, 170, 255, 0.08);
    color: var(--cyber-blue);
    font-weight: 800;
    font-size: 1.1rem;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: 0 0 10px rgba(0, 170, 255, 0.15);
}

.btn-ayuda:hover,
.btn-ayuda:focus-visible {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 0 18px var(--cyber-blue-soft);
}

/* =========================================================================
   4. PANEL DE ESTADÍSTICAS — Cyberpunk / Tech Dark
   ========================================================================= */

.panel-estadisticas {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-bottom: 28px;
}

.stat-item {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    min-width: 110px;
    padding: 12px 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(6px);
    transition: transform var(--transition-fast);
}

.stat-item:hover {
    transform: translateY(-3px) perspective(400px) rotateX(4deg);
}

.stat-icono {
    font-size: 1.1rem;
    color: var(--neon-green);
    text-shadow: 0 0 6px var(--neon-green-soft);
}

.stat-etiqueta {
    font-size: 0.7rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-muted);
}

.stat-valor {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-color);
}

.stat-vidas .stat-icono,
.stat-vidas .stat-valor {
    color: var(--danger);
    text-shadow: 0 0 6px var(--danger-soft);
}

.vidas-indicador {
    display: flex;
    gap: 3px;
    margin-top: 4px;
}

.vida {
    font-size: 0.85rem;
    line-height: 1;
    transition: color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast);
}

.vida.activa {
    color: var(--danger);
    text-shadow: 0 0 6px var(--danger-soft);
}

.vida.perdida {
    color: var(--text-muted);
    opacity: 0.35;
    transform: scale(0.9);
    text-shadow: none;
}

.stat-nivel .stat-icono,
.stat-nivel .stat-valor {
    color: var(--cyber-blue);
    text-shadow: 0 0 6px var(--cyber-blue-soft);
}

/* =========================================================================
   5. TABLERO
   ========================================================================= */

.categoria {
    color: var(--cyber-blue);
    text-shadow: 0 0 10px var(--cyber-blue-soft);
    margin-bottom: 10px;
    font-size: 1.4rem;
    letter-spacing: 0.5px;
}

.enunciado {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 30px;
    min-height: 55px;
}

.palabra-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 32px;
}

.letra-box {
    width: 40px;
    height: 50px;
    border-bottom: 3px solid var(--neon-green);
    box-shadow: 0 4px 10px -4px var(--neon-green-soft);
    font-size: 2rem;
    font-weight: bold;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    text-transform: uppercase;
    color: var(--text-color);
}

/* =========================================================================
   6. ÁREA DE PISTAS (norma IEEE)
   ========================================================================= */

.area-pistas {
    margin-bottom: 30px;
}

.btn-pista {
    background: rgba(0, 255, 140, 0.06);
    border: 1px solid var(--neon-green-soft);
    color: var(--neon-green);
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    cursor: pointer;
    transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.btn-pista:hover,
.btn-pista:focus-visible {
    box-shadow: 0 0 16px var(--neon-green-soft);
    transform: translateY(-2px);
}

.contenido-pista {
    margin-top: 14px;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.03);
    border-left: 3px solid var(--cyber-blue);
    border-radius: var(--radius-sm);
    text-align: left;
    animation: fadeIn var(--transition-med);
}

.pista-norma {
    display: inline-block;
    margin-top: 8px;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: var(--cyber-blue);
    text-shadow: 0 0 6px var(--cyber-blue-soft);
    text-transform: uppercase;
}

/* =========================================================================
   7. TECLADO VIRTUAL — Bordes con iluminación neón animada
   ========================================================================= */

.teclado-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    perspective: 600px;
}

.tecla {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-color);
    border: 1.5px solid var(--neon-green-soft);
    padding: 14px 18px;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
    animation: pulso-neon 2.6s ease-in-out infinite;
}

.tecla:hover,
.tecla:focus-visible {
    transform: translateY(-4px) perspective(500px) rotateX(6deg) scale(1.04);
    box-shadow: 0 0 18px var(--neon-green-soft);
    border-color: var(--neon-green);
}

.tecla:active {
    transform: translateY(-1px) scale(0.97);
}

.tecla.correcta {
    border-color: var(--neon-green);
    background: rgba(0, 255, 140, 0.12);
    color: var(--neon-green);
    box-shadow: 0 0 16px var(--neon-green-soft);
    animation: none;
}

.tecla.incorrecta {
    border-color: var(--danger);
    background: rgba(255, 51, 102, 0.12);
    color: var(--danger);
    box-shadow: 0 0 16px var(--danger-soft);
    animation: none;
}

.tecla:disabled {
    cursor: not-allowed;
    opacity: 0.55;
    transform: none;
    animation: none;
}

@keyframes pulso-neon {
    0%, 100% { box-shadow: 0 0 4px var(--neon-green-soft); border-color: var(--neon-green-soft); }
    50%      { box-shadow: 0 0 12px var(--cyber-blue-soft); border-color: var(--cyber-blue-soft); }
}

/* =========================================================================
   8. AUDIO INTERACTIVO
   ========================================================================= */

.contenedor-audio {
    margin-top: 28px;
    display: flex;
    justify-content: center;
}

.btn-audio-toggle {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.btn-audio-toggle:hover,
.btn-audio-toggle:focus-visible {
    color: var(--neon-green);
    box-shadow: 0 0 14px var(--neon-green-soft);
    transform: scale(1.08);
}

.btn-audio-toggle[aria-pressed="true"] {
    color: var(--cyber-blue);
    box-shadow: 0 0 14px var(--cyber-blue-soft);
}

/* =========================================================================
   9. MODALES (retroalimentación, agradecimiento, ayuda)
   ========================================================================= */

.modal {
    text-align: center;
}

.modal h1 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    text-shadow: 0 0 14px var(--neon-green-soft);
}

.caja-retroalimentacion {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--glass-border);
    padding: 20px;
    border-radius: var(--radius-md);
    margin: 20px 0;
}

.resumen p {
    font-size: 1.3rem;
    margin: 10px 0;
}

.botones {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 24px;
}

.btn {
    padding: 14px 28px;
    font-size: 1.1rem;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: #04140d;
    font-weight: 800;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:hover,
.btn:focus-visible {
    transform: translateY(-3px) perspective(400px) rotateX(6deg);
}

.btn-verde { background: var(--success); box-shadow: 0 0 14px var(--neon-green-soft); }
.btn-rojo  { background: var(--danger); color: #1a0006; box-shadow: 0 0 14px var(--danger-soft); }
.btn-azul  { background: var(--cyber-blue); width: 100%; max-width: 300px; margin-top: 20px; box-shadow: 0 0 14px var(--cyber-blue-soft); }

/* Modal de ayuda (overlay) */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 200;
}

.modal-overlay.oculta { display: none; }

.modal-contenido {
    position: relative;
    max-width: 520px;
    width: 100%;
    background: var(--bg-panel-alpha);
    backdrop-filter: blur(var(--blur-glass));
    -webkit-backdrop-filter: blur(var(--blur-glass));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: left;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.7), 0 0 30px var(--neon-green-soft);
    animation: fadeIn var(--transition-med);
}

.modal-ayuda-contenido h2 {
    color: var(--neon-green);
    text-shadow: 0 0 10px var(--neon-green-soft);
    margin-bottom: 16px;
}

.modal-ayuda-contenido h3 {
    color: var(--cyber-blue);
    margin: 16px 0 8px;
    font-size: 1rem;
    letter-spacing: 0.5px;
}

.modal-ayuda-contenido p {
    color: var(--text-color);
    line-height: 1.6;
    margin-bottom: 10px;
}

.modal-nota-ieee {
    font-size: 0.85rem;
    color: var(--text-muted);
    border-left: 3px solid var(--cyber-blue);
    padding-left: 12px;
}

.btn-cerrar {
    position: absolute;
    top: 14px;
    right: 14px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.btn-cerrar:hover,
.btn-cerrar:focus-visible {
    color: var(--danger);
    transform: rotate(90deg);
}

/* =========================================================================
   10. RESPONSIVE
   ========================================================================= */

/* ---- Tablets / móviles grandes (≤768px) ---- */
@media (max-width: 768px) {
    .app-contenedor {
        padding: 20px 12px;
    }

    .nav-principal .nav-lista {
        gap: 18px;
    }

    .pantalla {
        padding: 24px 18px;
        max-width: 100%;
        overflow-x: hidden;
    }

    .acib-sigla {
        font-size: 2rem;
    }

    .acib-subtitulo {
        font-size: 0.78rem;
    }

    .stat-item {
        min-width: 90px;
        padding: 10px 12px;
    }

    .stat-valor {
        font-size: 1.2rem;
    }

    .stat-etiqueta {
        font-size: 0.65rem;
    }

    .categoria {
        font-size: 1.2rem;
    }

    .enunciado {
        font-size: 1rem;
        min-height: auto;
        margin-bottom: 22px;
    }

    .letra-box {
        width: 34px;
        height: 44px;
        font-size: 1.6rem;
    }

    .teclado-container {
        gap: 6px;
    }

    .tecla {
        padding: 10px 12px;
        font-size: 0.95rem;
        min-width: 34px;
    }

    .modal h1 {
        font-size: 1.7rem;
    }

    .modal-contenido {
        padding: 24px 20px;
    }
}

/* ---- Móviles medianos (≤600px) ---- */
@media (max-width: 600px) {
    .header-contenedor {
        padding: 12px 16px;
    }

    .nav-principal {
        display: none;
    }

    .btn-menu-movil {
        display: flex;
    }

    .acib-encabezado {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 10px;
        margin-bottom: 18px;
    }

    .acib-titulo {
        align-items: center;
    }

    .acib-sigla {
        font-size: 1.8rem;
        letter-spacing: 2px;
    }

    .panel-estadisticas {
        gap: 8px;
        margin-bottom: 20px;
    }

    .stat-item {
        min-width: 78px;
        padding: 8px 10px;
    }

    .stat-icono {
        font-size: 0.95rem;
    }

    .stat-valor {
        font-size: 1.05rem;
    }

    .letra-box {
        width: 28px;
        height: 38px;
        font-size: 1.35rem;
    }

    .palabra-container {
        gap: 6px;
        margin-bottom: 22px;
    }

    .tecla {
        padding: 8px 10px;
        font-size: 0.85rem;
        min-width: 30px;
        border-radius: var(--radius-sm);
    }

    .teclado-container {
        gap: 5px;
    }

    .btn-pista {
        padding: 8px 14px;
        font-size: 0.9rem;
        width: 100%;
    }

    .contenido-pista {
        padding: 12px 14px;
    }

    .botones {
        flex-direction: column;
        gap: 12px;
    }

    .btn {
        width: 100%;
        padding: 12px 20px;
    }

    .resumen p {
        font-size: 1.1rem;
    }
}

/* ---- Móviles pequeños (≤380px) ---- */
@media (max-width: 380px) {
    .app-contenedor {
        padding: 14px 8px;
    }

    .pantalla {
        padding: 18px 12px;
    }

    .acib-sigla {
        font-size: 1.5rem;
    }

    .stat-item {
        min-width: 68px;
        padding: 6px 8px;
    }

    .stat-etiqueta {
        font-size: 0.58rem;
    }

    .letra-box {
        width: 24px;
        height: 34px;
        font-size: 1.15rem;
    }

    .tecla {
        padding: 7px 8px;
        font-size: 0.78rem;
        min-width: 26px;
    }

    .teclado-container {
        gap: 4px;
    }

    .modal h1 {
        font-size: 1.4rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}