/* ==========================================================================
   h3oGROUP - Landing Page
   Premium | Tecnológico | Minimalista
   ==========================================================================
   
   ÍNDICE
   01. Variables CSS
   02. Reset y Base
   03. Utilidades
   04. Botones
   05. Títulos de sección
   06. Header
   07. Hero
   08. Marcas
   09. Diferenciales
   10. Comparativa
   11. Tabla de medios
   12. Qué incluye
   13. Descuentos por volumen
   14. Cómo funciona
   15. FAQ
   16. CTA final
   17. Footer
   18. Animaciones
   19. Accesibilidad
   20. Responsive
   ========================================================================== */


/* ==========================================================================
   01. VARIABLES CSS
   ========================================================================== */

:root {
    /* Colores de marca */
    --color-dark: #0a1929;
    --color-dark-soft: #10233b;
    --color-blue: #2563eb;
    --color-blue-hover: #1d4ed8;
    --color-purple: #8b5cf6;
    --color-purple-hover: #7c3aed;
    
    /* Neutros */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-300: #cbd5e1;
    --color-gray-500: #64748b;
    --color-gray-700: #334155;
    --color-gray-900: #0f172a;
    
    /* Degradados */
    --gradient-brand: linear-gradient(135deg, var(--color-blue) 0%, var(--color-purple) 100%);
    --gradient-dark: linear-gradient(135deg, #0a1929 0%, #131f3d 55%, #231648 100%);
    
    /* Tipografía */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    
    --fs-xs: 0.8125rem;      /* 13px */
    --fs-sm: 0.9375rem;      /* 15px */
    --fs-base: 1rem;         /* 16px */
    --fs-md: 1.125rem;       /* 18px */
    --fs-lg: 1.375rem;       /* 22px */
    --fs-xl: 1.75rem;        /* 28px */
    --fs-2xl: 2.25rem;       /* 36px */
    --fs-3xl: 3rem;          /* 48px */
    
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    
    --lh-tight: 1.15;
    --lh-snug: 1.3;
    --lh-normal: 1.6;
    
    --tracking-tight: -0.02em;
    --tracking-normal: 0;
    --tracking-wide: 0.02em;
    
    /* Espaciado */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-8: 3rem;
    --space-10: 4rem;
    --space-12: 5rem;
    --space-16: 7rem;
    --space-section: clamp(4.5rem, 10vw, 8rem);
    
    /* Layout */
    --container-max: 1200px;
    --container-padding: clamp(1.25rem, 4vw, 2rem);
    
    /* Radios */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px rgba(10, 25, 41, 0.05);
    --shadow-md: 0 4px 12px rgba(10, 25, 41, 0.08);
    --shadow-lg: 0 12px 32px rgba(10, 25, 41, 0.12);
    --shadow-xl: 0 24px 60px rgba(10, 25, 41, 0.18);
    --shadow-glow: 0 8px 32px rgba(37, 99, 235, 0.28);
    
    /* Transiciones */
    --transition-fast: 180ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 280ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 450ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index */
    --z-header: 100;
    --z-overlay: 200;
}


/* ==========================================================================
   02. RESET Y BASE
   ========================================================================== */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    scroll-padding-top: 5.5rem;
}

body {
    font-family: var(--font-sans);
    font-size: var(--fs-base);
    font-weight: var(--fw-regular);
    line-height: var(--lh-normal);
    color: var(--color-dark);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

img,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    list-style: none;
}

button {
    font: inherit;
    background: none;
    border: none;
    cursor: pointer;
    color: inherit;
}

table {
    border-collapse: collapse;
    width: 100%;
}

h1, h2, h3, h4, h5, h6 {
    line-height: var(--lh-tight);
    font-weight: var(--fw-bold);
    letter-spacing: var(--tracking-tight);
}


/* ==========================================================================
   03. UTILIDADES
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-padding);
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    z-index: var(--z-overlay);
    padding: 0.75rem 1.25rem;
    background: var(--color-blue);
    color: var(--color-white);
    border-radius: var(--radius-md);
    font-weight: var(--fw-medium);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 1rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}


/* ==========================================================================
   04. BOTONES
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    line-height: 1;
    border-radius: var(--radius-full);
    white-space: nowrap;
    cursor: pointer;
    transition: background-color var(--transition-fast),
                color var(--transition-fast),
                border-color var(--transition-fast),
                transform var(--transition-fast),
                box-shadow var(--transition-fast);
    will-change: transform;
}

.btn:active {
    transform: translateY(1px) scale(0.99);
}

.btn-primary {
    background: var(--gradient-brand);
    color: var(--color-white);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--color-blue);
    border: 1.5px solid var(--color-blue);
}

.btn-secondary:hover {
    background: var(--color-blue);
    color: var(--color-white);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: var(--fs-base);
}

.btn-small {
    padding: 0.625rem 1.375rem;
    font-size: var(--fs-xs);
}

/* Botones sobre fondo oscuro */
.final-cta .btn-secondary,
.hero .btn-secondary {
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.4);
}

.final-cta .btn-secondary:hover,
.hero .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-white);
    color: var(--color-white);
}


/* ==========================================================================
   05. TÍTULOS DE SECCIÓN
   ========================================================================== */

section {
    padding-block: var(--space-section);
}

section h2 {
    font-size: clamp(1.875rem, 4vw, var(--fs-2xl));
    text-align: center;
    color: var(--color-dark);
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--fs-md);
    color: var(--color-gray-500);
    text-align: center;
    max-width: 620px;
    margin-inline: auto;
    margin-bottom: var(--space-10);
}


/* ==========================================================================
   06. HEADER
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    padding: 1rem 0;
    background: transparent;
    transition: background-color var(--transition-base),
                box-shadow var(--transition-base),
                padding var(--transition-base);
}

.header.scrolled {
    background: rgba(10, 25, 41, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
    padding: 0.75rem 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
}

.logo img {
    width: 130px;
    height: auto;
}

.main-nav .btn {
    padding: 0.75rem 1.5rem;
}


/* ==========================================================================
   07. HERO
   ========================================================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 8rem;
    padding-bottom: var(--space-section);
    background: var(--gradient-dark);
    color: var(--color-white);
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 780px;
}

.hero h1 {
    font-size: clamp(2.25rem, 6vw, var(--fs-3xl));
    font-weight: var(--fw-bold);
    line-height: var(--lh-tight);
    margin-bottom: var(--space-6);
    background: linear-gradient(135deg, #ffffff 0%, #c7d7fe 50%, #d8c7fe 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: clamp(1.0625rem, 2vw, var(--fs-md));
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: var(--space-8);
    max-width: 600px;
}

.hero-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

/* Decoración del hero: formas y luces */
.hero-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.hero-decoration::before {
    content: "";
    position: absolute;
    top: -20%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    max-width: 700px;
    max-height: 700px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.28) 0%, transparent 70%);
    filter: blur(40px);
}

.hero-decoration::after {
    content: "";
    position: absolute;
    bottom: -25%;
    left: -15%;
    width: 55vw;
    height: 55vw;
    max-width: 620px;
    max-height: 620px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.24) 0%, transparent 70%);
    filter: blur(50px);
}

/* Anillos geométricos decorativos */
.hero::before {
    content: "";
    position: absolute;
    top: 18%;
    right: 8%;
    width: 220px;
    height: 220px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    z-index: 1;
}

.hero::after {
    content: "";
    position: absolute;
    top: 26%;
    right: 13%;
    width: 130px;
    height: 130px;
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 50%;
    z-index: 1;
}


/* ==========================================================================
   08. MARCAS
   ========================================================================== */

.brands {
    background: var(--color-gray-50);
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    align-items: center;
    justify-items: center;
    margin-top: var(--space-8);
}

.brands-grid img {
    max-height: 35px;
    width: auto;
    opacity: 0.55;
    filter: grayscale(100%);
    transition: opacity var(--transition-base), filter var(--transition-base);
}

.brands-grid img:hover {
    opacity: 1;
    filter: grayscale(0%);
}


/* ==========================================================================
   09. DIFERENCIALES
   ========================================================================== */

.differentials {
    position: relative;
    background: var(--color-white);
}

.differentials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5);
}

.differential-card {
    position: relative;
    padding: var(--space-6);
    background: rgba(248, 250, 252, 0.6);
    border: 1px solid var(--color-gray-100);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-base),
                box-shadow var(--transition-base),
                border-color var(--transition-base);
}

.differential-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(37, 99, 235, 0.2);
}

.differential-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-5);
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    color: var(--color-blue);
}

.differential-card h3 {
    font-size: var(--fs-lg);
    margin-bottom: var(--space-3);
    color: var(--color-dark);
}

.differential-card p {
    font-size: var(--fs-sm);
    color: var(--color-gray-500);
}


/* ==========================================================================
   10. COMPARATIVA
   ========================================================================== */

.comparison {
    background: var(--color-gray-50);
}

.comparison-table {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5);
    max-width: 960px;
    margin-inline: auto;
}

.comparison-column {
    padding: var(--space-6);
    border-radius: var(--radius-lg);
}

.comparison-column h3 {
    font-size: var(--fs-lg);
    margin-bottom: var(--space-5);
}

.comparison-column ul {
    display: grid;
    gap: var(--space-4);
}

.comparison-column li {
    position: relative;
    padding-left: 2rem;
    font-size: var(--fs-sm);
}

.comparison-column li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.2em;
    width: 20px;
    height: 20px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
}

.comparison-negative {
    background: var(--color-white);
    border: 1px solid var(--color-gray-100);
    color: var(--color-gray-500);
}

.comparison-negative h3 {
    color: var(--color-gray-700);
}

.comparison-negative li::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none'%3E%3Cpath d='M15 5L5 15M5 5l10 10' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
}

.comparison-positive {
    background: var(--gradient-dark);
    color: rgba(255, 255, 255, 0.85);
    box-shadow: var(--shadow-xl);
}

.comparison-positive h3 {
    color: var(--color-white);
}

.comparison-positive li::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none'%3E%3Cpath d='M16.667 5L7.5 14.167 3.333 10' stroke='%238b5cf6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

.comparison-cta {
    text-align: center;
    margin-top: var(--space-10);
}


/* ==========================================================================
   11. TABLA DE MEDIOS
   ========================================================================== */

.media-table {
    background: var(--color-white);
}

.table-responsive {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    background: var(--color-white);
    -webkit-overflow-scrolling: touch;
}

.media-table table {
    min-width: 760px;
}

.media-table thead {
    background: var(--gradient-dark);
    color: var(--color-white);
}

.media-table th {
    padding: 1.125rem 1.25rem;
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    text-align: left;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    white-space: nowrap;
}

.media-table td {
    padding: 1.25rem;
    font-size: var(--fs-sm);
    border-top: 1px solid var(--color-gray-100);
    vertical-align: middle;
}

.media-table tbody tr {
    transition: background-color var(--transition-fast);
}

.media-table tbody tr:hover {
    background: var(--color-gray-50);
}

.media-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: var(--fw-semibold);
    color: var(--color-dark);
    transition: color var(--transition-fast);
}

.media-link:hover {
    color: var(--color-blue);
}

.media-link img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
}

.table-note {
    font-size: var(--fs-xs);
    color: var(--color-gray-500);
    text-align: center;
    margin-top: var(--space-5);
}


/* ==========================================================================
   12. QUÉ INCLUYE
   ========================================================================== */

.included {
    background: var(--color-gray-50);
}

.included-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
    max-width: 960px;
    margin-inline: auto;
}

.included-card {
    padding: var(--space-8);
    background: var(--color-white);
    border: 1px solid var(--color-gray-100);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.included-card h3 {
    font-size: var(--fs-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    flex-wrap: wrap;
    margin-bottom: var(--space-6);
    color: var(--color-dark);
}

.price-range {
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    color: var(--color-white);
    background: var(--gradient-brand);
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-full);
}

.included-card ul {
    display: grid;
    gap: var(--space-4);
}

.included-card li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: var(--fs-sm);
    color: var(--color-gray-700);
}

.included-card li svg {
    flex-shrink: 0;
    color: var(--color-blue);
    margin-top: 0.15em;
}


/* ==========================================================================
   13. DESCUENTOS POR VOLUMEN
   ========================================================================== */

.discounts {
    background: var(--color-white);
}

.discounts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5);
    max-width: 1080px;
    margin-inline: auto;
}

.discount-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-8) var(--space-6);
    background: var(--color-white);
    border: 1px solid var(--color-gray-100);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: transform var(--transition-base),
                box-shadow var(--transition-base);
}

.discount-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.discount-card h3 {
    font-size: var(--fs-md);
    color: var(--color-gray-500);
    font-weight: var(--fw-semibold);
}

.discount-volume {
    font-size: var(--fs-sm);
    color: var(--color-gray-500);
}

.discount-percentage {
    font-size: var(--fs-2xl);
    font-weight: var(--fw-bold);
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: var(--lh-snug);
}

.discount-percentage span {
    display: block;
    font-size: var(--fs-xs);
    font-weight: var(--fw-regular);
    color: var(--color-gray-500);
    -webkit-text-fill-color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.discount-saving {
    font-size: var(--fs-sm);
    color: var(--color-dark);
    font-weight: var(--fw-medium);
}

.discount-note {
    font-size: var(--fs-xs);
    color: var(--color-gray-500);
}

.discount-featured {
    background: var(--gradient-dark);
    border-color: transparent;
    color: var(--color-white);
    box-shadow: var(--shadow-xl);
}

.discount-featured h3,
.discount-featured .discount-volume,
.discount-featured .discount-saving {
    color: var(--color-white);
}

.discount-featured .discount-percentage {
    background: linear-gradient(135deg, #8ec5ff 0%, #c7a9ff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.discount-featured .discount-percentage span,
.discount-featured .discount-note {
    color: rgba(255, 255, 255, 0.6);
    -webkit-text-fill-color: rgba(255, 255, 255, 0.6);
}

.discount-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.375rem 1rem;
    background: var(--gradient-brand);
    color: var(--color-white);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    border-radius: var(--radius-full);
    white-space: nowrap;
    box-shadow: var(--shadow-glow);
}

.discounts-cta {
    text-align: center;
    margin-top: var(--space-10);
}


/* ==========================================================================
   14. CÓMO FUNCIONA
   ========================================================================== */

.how-it-works {
    background: var(--color-gray-50);
}

.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
    counter-reset: step;
}

.step {
    position: relative;
    padding: var(--space-6);
    background: var(--color-white);
    border: 1px solid var(--color-gray-100);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.step-number {
    font-size: var(--fs-2xl);
    font-weight: var(--fw-bold);
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: var(--space-4);
}

.step h3 {
    font-size: var(--fs-md);
    margin-bottom: var(--space-3);
    color: var(--color-dark);
}

.step p {
    font-size: var(--fs-sm);
    color: var(--color-gray-500);
}


/* ==========================================================================
   15. FAQ
   ========================================================================== */

.faq {
    background: var(--color-white);
}

.faq-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    max-width: 1080px;
    margin-inline: auto;
}

.faq-main {
    display: grid;
    gap: var(--space-5);
    align-content: start;
}

.faq-item {
    padding: var(--space-6);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--color-blue);
}

.faq-item h3 {
    font-size: var(--fs-md);
    margin-bottom: var(--space-3);
    color: var(--color-dark);
}

.faq-item p {
    font-size: var(--fs-sm);
    color: var(--color-gray-500);
}

.faq-accordion {
    display: grid;
    gap: var(--space-3);
}

.accordion-item {
    border: 1px solid var(--color-gray-100);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.accordion-item.open {
    border-color: rgba(37, 99, 235, 0.3);
}

.accordion-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    width: 100%;
    padding: 1.25rem 1.5rem;
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    text-align: left;
    color: var(--color-dark);
    background: var(--color-white);
    transition: background-color var(--transition-fast);
}

.accordion-trigger:hover {
    background: var(--color-gray-50);
}

.accordion-trigger svg {
    flex-shrink: 0;
    color: var(--color-blue);
    transition: transform var(--transition-base);
}

.accordion-item.open .accordion-trigger svg {
    transform: rotate(180deg);
}

.accordion-content {
    padding: 0 1.5rem 1.25rem;
    font-size: var(--fs-sm);
    color: var(--color-gray-500);
}

.accordion-content[hidden] {
    display: none;
}


/* ==========================================================================
   16. CTA FINAL
   ========================================================================== */

.final-cta {
    position: relative;
    background: var(--gradient-dark);
    color: var(--color-white);
    text-align: center;
    overflow: hidden;
}

.final-cta::before {
    content: "";
    position: absolute;
    top: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 70vw;
    height: 70vw;
    max-width: 800px;
    max-height: 800px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
    filter: blur(50px);
    pointer-events: none;
}

.final-cta .container {
    position: relative;
    z-index: 2;
}

.final-cta h2 {
    color: var(--color-white);
    margin-bottom: var(--space-4);
}

.final-cta-subtitle {
    font-size: var(--fs-md);
    color: rgba(255, 255, 255, 0.7);
    max-width: 560px;
    margin-inline: auto;
    margin-bottom: var(--space-8);
}

.final-cta-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-4);
}


/* ==========================================================================
   17. FOOTER
   ========================================================================== */

.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-500);
    padding: var(--space-12) 0 var(--space-6);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    padding-bottom: var(--space-8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
    width: 130px;
    margin-bottom: var(--space-4);
}

.footer-column p {
    font-size: var(--fs-sm);
    margin-bottom: var(--space-2);
}

.footer-column a {
    font-size: var(--fs-sm);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-white);
}

.footer-column h4 {
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    color: var(--color-white);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.footer-column ul {
    display: grid;
    gap: var(--space-3);
}

.footer-bottom {
    padding-top: var(--space-6);
    text-align: center;
    font-size: var(--fs-xs);
}


/* ==========================================================================
   18. ANIMACIONES
   ========================================================================== */

[data-animate] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 700ms cubic-bezier(0.22, 1, 0.36, 1),
                transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

[data-animate].in-view {
    opacity: 1;
    transform: translateY(0);
}

/* Retrasos escalonados para grids */
[data-animate-delay="1"] { transition-delay: 100ms; }
[data-animate-delay="2"] { transition-delay: 200ms; }
[data-animate-delay="3"] { transition-delay: 300ms; }
[data-animate-delay="4"] { transition-delay: 400ms; }


/* ==========================================================================
   19. ACCESIBILIDAD
   ========================================================================== */

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

.final-cta :focus-visible,
.hero :focus-visible,
.header :focus-visible,
.comparison-positive :focus-visible,
.discount-featured :focus-visible {
    outline-color: var(--color-white);
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    [data-animate] {
        opacity: 1;
        transform: none;
    }
}


/* ==========================================================================
   20. RESPONSIVE
   ========================================================================== */

/* Tablet: >= 640px */
@media (min-width: 640px) {
    .brands-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .differentials-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .discounts-grid {
        grid-template-columns: repeat(3, 1fr);
        align-items: stretch;
    }
}

/* Desktop: >= 900px */
@media (min-width: 900px) {
    .logo img {
        width: 161px;
    }

    .brands-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-8);
    }

    .differentials-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .comparison-table {
        grid-template-columns: 1fr 1fr;
        align-items: stretch;
    }

    .included-grid {
        grid-template-columns: 1fr 1fr;
    }

    .steps-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .faq-layout {
        grid-template-columns: 1fr 1.2fr;
        align-items: start;
    }

    .footer-grid {
        grid-template-columns: 1.4fr 1fr 1fr;
    }
}

/* Desktop grande: >= 1200px */
@media (min-width: 1200px) {
    .brands-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}