/* ==========================================
   VARIABLES Y RESET
   ========================================== */

:root {
    /* Colores principales */
    --color-primary: #2563EB;
    --color-primary-dark: #1E40AF;
    --color-primary-light: #3B82F6;
    
    /* Colores secundarios */
    --color-secondary: #60A5FA;
    --color-secondary-light: #93C5FD;
    
    /* Colores neutros */
    --color-white: #FFFFFF;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;
    
    /* Colores de fondo */
    --color-bg-light: #EFF6FF;
    --color-bg-lighter: #DBEAFE;
    
    /* Tipografía */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    
    /* Tamaños de fuente */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Bordes */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Contenedor */
    --container-max-width: 1200px;
}

/* Reset básico */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

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

/* ==========================================
   COMPONENTES REUTILIZABLES
   ========================================== */

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: var(--text-base);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    cursor: pointer;
    text-align: center;
    white-space: nowrap;
}

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

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

.btn--ghost {
    background-color: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
}

.btn--ghost:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
}

.btn--large {
    padding: 1rem 2rem;
    font-size: var(--text-lg);
}

/* ==========================================
   HEADER
   ========================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: box-shadow var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header__container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-primary);
    cursor: pointer;
}

.header__logo-icon {
    color: var(--color-primary);
}

.header__nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.header__nav-link {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-gray-700);
    transition: color var(--transition-fast);
    position: relative;
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-normal);
}

.header__nav-link:hover {
    color: var(--color-primary);
}

.header__nav-link:hover::after {
    width: 100%;
}

.header__nav-link--cta {
    padding: 0.5rem 1.25rem;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-md);
}

.header__nav-link--cta::after {
    display: none;
}

.header__nav-link--cta:hover {
    background-color: var(--color-primary-dark);
}

.header__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.header__toggle-line {
    width: 25px;
    height: 2px;
    background-color: var(--color-gray-800);
    transition: all var(--transition-normal);
}

/* ==========================================
   HERO SECTION
   ========================================== */

.hero {
    padding: 160px var(--spacing-xl) var(--spacing-4xl);
    background: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-white) 100%);
}

.hero__container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero__content {
    animation: fadeInUp 1s ease-out;
}

.hero__title {
    font-size: var(--text-5xl);
    font-weight: 800;
    line-height: 1.1;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
}

.hero__title-highlight {
    color: var(--color-primary);
    position: relative;
    display: inline-block;
}

.hero__subtitle {
    font-size: var(--text-xl);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

.hero__cta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.hero__image {
    animation: fadeInRight 1s ease-out;
}

.hero__image-placeholder {
    width: 100%;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ==========================================
   FEATURES SECTION
   ========================================== */

.features {
    padding: var(--spacing-4xl) var(--spacing-xl);
    background-color: var(--color-white);
}

.features__container {
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.features__header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.features__title {
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.features__subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto;
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
}

.feature-card {
    padding: var(--spacing-2xl);
    background-color: var(--color-gray-50);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
    background-color: var(--color-white);
}

.feature-card__icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg-lighter);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.feature-card:hover .feature-card__icon {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: scale(1.1);
}

.feature-card__title {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.feature-card__description {
    font-size: var(--text-base);
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ==========================================
   BENEFITS SECTION
   ========================================== */

.benefits {
    padding: var(--spacing-4xl) var(--spacing-xl);
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-bg-light) 100%);
}

.benefits__container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.benefits__title {
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.benefits__intro {
    font-size: var(--text-lg);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2xl);
}

.benefits__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.benefit-item {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.benefit-item__icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
}

.benefit-item__title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xs);
}

.benefit-item__text {
    font-size: var(--text-base);
    color: var(--color-gray-600);
    line-height: 1.6;
}

.benefits__stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.stat-card {
    padding: var(--spacing-xl);
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: transform var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card__number {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-card__label {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    font-weight: 500;
}

/* ==========================================
   CTA SECTION
   ========================================== */

.cta {
    padding: var(--spacing-4xl) var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.cta__container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.cta__title {
    font-size: var(--text-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.cta__text {
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.95;
    line-height: 1.7;
}

.cta__buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.cta__note {
    font-size: var(--text-sm);
    opacity: 0.8;
}

/* ==========================================
   FOOTER
   ========================================== */

.footer {
    padding: var(--spacing-4xl) var(--spacing-xl) var(--spacing-xl);
    background-color: var(--color-gray-900);
    color: var(--color-gray-300);
}

.footer__container {
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.footer__content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-4xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-gray-700);
    margin-bottom: var(--spacing-xl);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.footer__logo-icon {
    color: var(--color-primary);
}

.footer__tagline {
    font-size: var(--text-sm);
    color: var(--color-gray-400);
    line-height: 1.6;
}

.footer__links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer__column-title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.footer__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__link {
    font-size: var(--text-sm);
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-primary);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer__copyright {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

.footer__social {
    display: flex;
    gap: var(--spacing-md);
}

.footer__social-link {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-gray-800);
    color: var(--color-gray-400);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.footer__social-link:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-3px);
}

/* ==========================================
   MEDIA QUERIES - RESPONSIVE
   ========================================== */

/* Tablet - 768px */
@media (max-width: 768px) {
    :root {
        --text-5xl: 2.25rem;
        --text-4xl: 1.875rem;
        --text-3xl: 1.5rem;
    }
    
    /* Header responsive */
    .header__nav {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: 0;
        overflow: hidden;
        background-color: var(--color-white);
        box-shadow: var(--shadow-lg);
        transition: height var(--transition-normal);
    }
    
    .header__nav.active {
        height: auto;
        padding: var(--spacing-xl) 0;
    }
    
    .header__nav-list {
        flex-direction: column;
        gap: 0;
        width: 100%;
    }
    
    .header__nav-item {
        width: 100%;
        text-align: center;
    }
    
    .header__nav-link {
        display: block;
        padding: var(--spacing-md) var(--spacing-xl);
        width: 100%;
    }
    
    .header__nav-link--cta {
        margin: var(--spacing-md) var(--spacing-xl);
        display: inline-block;
        width: auto;
    }
    
    .header__toggle {
        display: flex;
    }
    
    .header__toggle.active .header__toggle-line:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .header__toggle.active .header__toggle-line:nth-child(2) {
        opacity: 0;
    }
    
    .header__toggle.active .header__toggle-line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    /* Hero responsive */
    .hero {
        padding: 120px var(--spacing-lg) var(--spacing-3xl);
    }
    
    .hero__container {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .hero__image {
        order: -1;
    }
    
    .hero__cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    /* Benefits responsive */
    .benefits__container {
        grid-template-columns: 1fr;
    }
    
    .benefits__visual {
        order: -1;
    }
    
    /* Footer responsive */
    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer__links {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer__bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* Mobile - 480px */
@media (max-width: 480px) {
    :root {
        --text-5xl: 1.875rem;
        --text-4xl: 1.5rem;
        --spacing-xl: 1rem;
        --spacing-2xl: 1.5rem;
        --spacing-3xl: 2rem;
        --spacing-4xl: 3rem;
    }
    
    .header__container {
        padding: 0 var(--spacing-lg);
    }
    
    .hero {
        padding: 100px var(--spacing-md) var(--spacing-2xl);
    }
    
    .hero__title {
        font-size: var(--text-3xl);
    }
    
    .hero__subtitle {
        font-size: var(--text-base);
    }
    
    .features,
    .benefits,
    .cta {
        padding: var(--spacing-3xl) var(--spacing-md);
    }
    
    .features__grid {
        grid-template-columns: 1fr;
    }
    
    .benefits__stats {
        grid-template-columns: 1fr;
    }
    
    .cta__buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer {
        padding: var(--spacing-3xl) var(--spacing-md) var(--spacing-lg);
    }
}