:root {
    --color-bg: #ffffff;
    --color-bg-light: #faf5ff; /* Soft violet tint */
    --color-text: #171717; /* Neutral 900 */
    --color-text-muted: #525252; /* Neutral 600 */
    --color-primary: #171717; /* Carbon black */
    --color-primary-hover: #262626;
    --color-accent: #7c3aed; /* Vibrant violet from logo */
    --color-accent-hover: #6d28d9; /* Deep violet */
    --color-border: #e5e5e5;
    
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-display: 'Outfit', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    z-index: 0;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../bg-pattern.png');
    background-repeat: repeat;
    background-size: 300px;
    opacity: 0.12;
    z-index: -1;
    pointer-events: none;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-xl) 0;
}

.bg-light {
    background-color: var(--color-bg-light);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.section-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-align: center;
    letter-spacing: -0.03em;
}

.section-title.text-left {
    text-align: left;
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--color-primary);
    line-height: 1.2;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.btn-large {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--color-bg);
    color: var(--color-primary);
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background-color: var(--color-bg-light);
}

.btn-loader {
    display: none;
    width: 18px;
    height: 18px;
    animation: spin 1s linear infinite;
}

@keyframes spin { 100% { transform: rotate(360deg); } }

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    padding: 1.25rem 0;
    transition: padding 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.navbar.scrolled {
    padding: 0.75rem 0;
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
}

.logo-img {
    height: 75px;
    width: auto;
    max-width: 250px;
    object-fit: contain;
    transition: height 0.3s ease;
}

.navbar.scrolled .logo-img {
    height: 50px;
}

.mobile-menu-btn {
    display: block;
    background: none;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    padding: 0.5rem;
    z-index: 200;
    position: relative;
}

.nav-links {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-bg);
    justify-content: center;
    align-items: center;
    gap: 2rem;
    z-index: 150;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.nav-links.active {
    opacity: 1;
    visibility: visible;
}

.nav-links a:not(.btn) {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.nav-links a:not(.btn):hover {
    color: var(--color-primary);
}

@media (min-width: 768px) {
    .mobile-menu-btn {
        display: none;
    }
    .nav-links {
        position: static;
        flex-direction: row;
        width: auto;
        height: auto;
        background: none;
        opacity: 1;
        visibility: visible;
        gap: var(--spacing-md);
    }
    .nav-links a:not(.btn) {
        font-size: 0.875rem;
        font-weight: 400;
    }
}

/* Hero */
.hero {
    padding: 6rem 0 5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(124,58,237,0.08) 0%, rgba(255,255,255,0) 70%);
    z-index: -1;
    border-radius: 50%;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    max-width: 800px;
    margin: 0 auto var(--spacing-sm);
    line-height: 1.1;
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-accent) 0%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 550px;
    margin: 0 auto var(--spacing-md);
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    justify-content: center;
    align-items: center;
}

@media (min-width: 640px) {
    .hero-title {
        font-size: 4.5rem;
    }
    .hero-actions {
        flex-direction: row;
    }
}

/* Trusted By / Clients */
.clients {
    padding: 2rem 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-bg-light);
    text-align: center;
}

.clients-title {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 500;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.clients-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem 4rem;
    opacity: 0.6;
    filter: grayscale(100%);
    transition: opacity 0.3s ease, filter 0.3s ease;
}

.clients-logos:hover {
    opacity: 1;
    filter: grayscale(0%);
}

.client-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-muted);
    transition: transform 0.2s ease, color 0.2s ease;
}

.client-link:hover {
    color: var(--color-primary);
    transform: translateY(-2px);
}

.client-logo-img {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid transparent;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.2s ease;
    background-color: var(--color-bg);
}

.client-link:hover .client-logo-img {
    border-color: var(--color-accent);
}

.client-name {
    font-weight: 600;
    font-size: 1.125rem;
    letter-spacing: -0.01em;
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.service-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    display: flex;
    flex-direction: column;
}

.service-img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-top: 1.5rem;
    display: block;
    box-shadow: var(--shadow-sm);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: #d4d4d4;
}

.icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    transition: color 0.3s ease, border-color 0.3s ease;
}

.service-card:hover .icon-wrapper {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.service-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.service-card p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    flex-grow: 1;
}

/* Proposal Section */
.proposal-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

@media (min-width: 768px) {
    .proposal-container {
        grid-template-columns: 1fr 1fr;
    }
}

.feature-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.feature-item svg {
    flex-shrink: 0;
    color: var(--color-primary);
    margin-top: 2px;
}

.feature-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.feature-item p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

.proposal-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.propuesta-img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: block;
}

/* Testimonials */
.testimonials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.testimonial-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

.testimonial-content {
    font-size: 1rem;
    color: var(--color-text);
    font-style: italic;
    margin-bottom: 1.5rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 40px;
    height: 40px;
    background-color: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

.author-info h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin: 0;
}

.author-info span {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* FAQ */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-question {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 1.5rem 0;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: inherit;
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: 300;
    transition: transform 0.3s ease;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding-bottom: 1.5rem;
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

/* Contact */
.contact-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr;
    box-shadow: var(--shadow-lg);
}

@media (min-width: 768px) {
    .contact-card {
        grid-template-columns: 1fr 1fr;
    }
}

.contact-info {
    padding: 2.5rem;
    background-color: #4c1d95; /* Tonos más oscuros y elegantes */
    color: #ffffff;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-info h2 {
    color: #ffffff;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.contact-info p {
    color: #a1a1aa;
    font-size: 0.9375rem;
}

.form {
    padding: 2.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.375rem;
    color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.625rem 0.75rem;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-text-muted);
    box-shadow: 0 0 0 1px var(--color-text-muted);
}

.form-message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    display: none;
}

.error-message {
    background-color: #fafafa;
    color: #ef4444;
    border: 1px solid var(--color-border);
}

/* Footer */
.footer {
    padding: 3rem 0 2rem;
}

.footer-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    justify-content: space-between;
    margin-bottom: 2rem;
}

@media (min-width: 640px) {
    .footer-container {
        flex-direction: row;
        align-items: center;
    }
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.footer-links a:not(.social-link) {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.footer-links a:not(.social-link):hover {
    color: var(--color-accent);
}

.social-link {
    color: var(--color-text-muted);
    transition: color 0.2s ease, transform 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-link:hover {
    color: var(--color-accent);
    transform: translateY(-2px);
}

.copyright {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-align: center;
    border-top: 1px solid var(--color-border);
    padding-top: 2rem;
}

/* FAB WhatsApp */
.whatsapp-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    background-color: #25D366;
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    z-index: 900;
    transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.whatsapp-fab svg {
    width: 32px;
    height: 32px;
}

.whatsapp-fab:hover {
    transform: scale(1.05);
    background-color: #128C7E;
    box-shadow: var(--shadow-lg);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 1rem;
    z-index: 1000;
    transition: bottom 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    width: 90%;
    max-width: 320px;
}

.toast.show {
    bottom: 30px;
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.toast-icon-wrapper {
    background-color: #f0fdf4;
    color: #16a34a;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.toast-icon {
    width: 20px;
    height: 20px;
}

.toast-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    margin: 0 0 0.125rem 0;
}

.toast-message {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* Scroll Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}