:root {
    /* Paleta de colores mandatoria */
    --black-deep: #0B0B0B;
    --grey-charcoal: #1A1A1A;
    --white-pure: #FFFFFF;
    --silver-soft: #CFCFCF;
    --gold-faint: #8C7A5B;
    
    /* Tipografía */
    --font-main: 'Montserrat', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--black-deep);
    color: var(--white-pure);
    font-family: var(--font-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
    /* Sensación cinematográfica: Gradiente radial sutil */
    background: radial-gradient(circle at 50% 25%, #151515 0%, var(--black-deep) 80%);
}

/* Textura casi imperceptible tipo noise premium */
.noise-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.container {
    width: 100%;
    max-width: 500px;
    padding: 40px 32px;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

/* Animaciones suaves, sensación Tesla/Apple */
@keyframes smoothEntry {
    0% {
        opacity: 0;
        transform: scale(0.96) translateY(-10px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes fadeUp {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 2. Logo - Glorificación y Contraste */
.logo-container {
    margin-top: 10vh;
    margin-bottom: 10vh;
    animation: smoothEntry 2s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    width: 100%;
}

/* Fondo tipo spotlight radial detrás del logo */
.logo-container::before {
    content: '';
    position: absolute;
    width: 450px;
    height: 450px;
    /* Centro gris medio desvaneciendo al negro original */
    background: radial-gradient(circle, rgba(42, 42, 42, 0.6) 0%, rgba(11, 11, 11, 0) 70%);
    filter: blur(50px);
    z-index: -1;
    pointer-events: none;
}

.brand-logo {
    width: 280px;
    max-width: 90%;
    /* Mayor claridad y glow sutil para lectura perfecta */
    filter: brightness(1.25) contrast(1.1) drop-shadow(0 0 8px rgba(255, 255, 255, 0.08));
    display: block;
}

/* 3. Titular */
.headline {
    font-size: 0.7rem;
    font-weight: 300;
    color: var(--silver-soft);
    letter-spacing: 0.45em;
    text-transform: uppercase;
    text-align: center;
    margin-bottom: 10vh; /* Más aire */
    opacity: 0;
    animation: fadeUp 1.8s cubic-bezier(0.2, 0.8, 0.2, 1) 1s forwards;
}

/* 4. Arquitectura de Decisión (Botones) */
.actions-container {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 32px; /* Más espacio entre elementos */
    opacity: 0;
    animation: fadeUp 1.8s cubic-bezier(0.2, 0.8, 0.2, 1) 1.4s forwards;
    padding-bottom: 5vh;
}

.btn {
    background: rgba(30, 30, 30, 0.3); /* Un poco más de contraste base */
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.18); /* Borde metálico más claro */
    border-radius: 8px; /* Esquinas más suaves */
    padding: 32px 24px; /* Padding aumentado para premium feel */
    cursor: pointer;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    color: var(--white-pure);
    text-decoration: none;
    box-shadow: 0 15px 40px rgba(0,0,0,0.4);
}

/* Efecto de iluminación interna sutil (Glow) */
.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(207, 207, 207, 0.12) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.btn:hover::after, .btn:focus::after {
    opacity: 1;
}

.btn:hover, .btn:active {
    border-color: rgba(207, 207, 207, 0.35);
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.04), inset 0 0 20px rgba(255, 255, 255, 0.03);
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(1px) scale(0.98);
}

.btn-title {
    display: block;
    color: var(--white-pure);
    font-size: 0.95rem;
    font-weight: 300;
    letter-spacing: 0.15em;
    margin-bottom: 10px;
    text-transform: uppercase;
    position: relative;
}

/* Opcional: Dorado tenue en microdetalle */
.btn-title::after {
    content: '';
    display: block;
    width: 0;
    height: 1px;
    background-color: var(--gold-faint);
    margin: 8px auto 0;
    transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0.6;
}

.btn:hover .btn-title::after, 
.btn-active .btn-title::after {
    width: 24px;
}

.btn-subtitle {
    display: block;
    color: var(--silver-soft);
    font-size: 0.7rem;
    font-weight: 200;
    letter-spacing: 0.05em;
    opacity: 0.6;
    transition: opacity 0.4s ease;
}

.btn:hover .btn-subtitle {
    opacity: 0.9;
}

/* Botón Principal */
.primary-btn {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.25); /* Mayor contraste en el principal */
    background: rgba(35, 35, 35, 0.4);
}

/* Nuevo botón prototipo (Mismo estilo, énfasis ligeramente menor) */
.secondary-main-btn {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.15); 
    background: rgba(30, 30, 30, 0.3);
}

.section-label {
    font-size: 0.6rem;
    font-weight: 400;
    color: rgba(207, 207, 207, 0.5); /* Gris tenue */
    letter-spacing: 0.5em;
    text-transform: uppercase;
    text-align: center;
    margin-top: 10px;
    margin-bottom: -15px; /* Ajuste fino de espaciado */
}

/* Botones Secundarios */
.secondary-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.secondary-btn {
    padding: 24px 12px;
    background: rgba(20, 20, 20, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.12); /* Menor intensidad */
}

.secondary-btn .btn-title {
    font-size: 0.75rem;
    margin-bottom: 8px;
    letter-spacing: 0.1em;
}

.secondary-btn .btn-subtitle {
    font-size: 0.6rem;
}

/* Responsive constraints y refinamientos para móviles más pequeños */
@media (max-width: 400px) {
    .container {
        padding: 30px 20px;
    }
    .brand-logo {
        width: 200px;
    }
    .headline {
        letter-spacing: 0.3em;
        font-size: 0.65rem;
    }
    .secondary-grid {
        gap: 12px;
    }
}