/* ===== Variables CSS ===== */
:root {
    --color-primary: #1a1a2e;
    --color-secondary: #e94560;
    --color-accent: #f39c12;
    --color-dark: #0f0f1a;
    --color-light: #f8f9fa;
    --color-gray: #6c757d;
    --color-gray-light: #e9ecef;
    --color-white: #ffffff;
    --color-whatsapp: #25d366;

    --font-family: 'Poppins', sans-serif;
    --font-size-base: 16px;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    --border-radius: 8px;
    --border-radius-lg: 16px;

    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);

    --transition: all 0.3s ease;

    --header-height: 80px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* ===== Utilidades ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 2rem;
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: #d63850;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-whatsapp:hover {
    background-color: #1da851;
    transform: translateY(-2px);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--color-secondary);
    margin: var(--spacing-sm) auto 0;
    border-radius: 2px;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo-text {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 2px;
}

.logo-icon {
    color: var(--color-accent);
}

.footer-logo {
    height: 40px;
    filter: brightness(0) invert(1);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-menu a {
    font-weight: 500;
    color: var(--color-dark);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-secondary);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-dark) 100%);
    color: var(--color-white);
    text-align: center;
    padding-top: var(--header-height);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../img/hero-pattern.svg') center/cover no-repeat;
    opacity: 1;
    animation: subtleFloat 20s ease-in-out infinite;
}

@keyframes subtleFloat {
    0%, 100% {
        transform: scale(1) translateY(0);
    }
    50% {
        transform: scale(1.05) translateY(-10px);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

/* ===== Sections ===== */
.section {
    padding: var(--spacing-xl) 0;
}

.section-alt {
    background-color: var(--color-light);
}

/* ===== About / Nosotros ===== */
.about-content {
    display: grid;
    gap: var(--spacing-lg);
}

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

.about-text p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray);
    font-size: 1.1rem;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.feature {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.feature h3 {
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.feature p {
    color: var(--color-gray);
    font-size: 0.95rem;
}

/* ===== Servicios ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

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

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--color-light);
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
    color: var(--color-secondary);
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--color-secondary);
    color: var(--color-white);
}

.service-card h3 {
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.service-card p {
    color: var(--color-gray);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== Clientes ===== */
.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    align-items: center;
}

.client-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100px;
    padding: var(--spacing-sm);
    background: var(--color-light);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.client-logo:hover {
    background: var(--color-gray-light);
    transform: scale(1.05);
}

.client-logo span {
    color: var(--color-gray);
    font-weight: 500;
}

/* Grid de 7 columnas en widescreen */
@media (min-width: 1200px) {
    .clients-grid {
        grid-template-columns: repeat(7, 1fr);
    }
}

/* ===== Contacto ===== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.contact-info h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.contact-info > p {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    color: var(--color-gray);
}

.contact-item svg {
    flex-shrink: 0;
    color: var(--color-secondary);
}

.contact-item strong {
    display: block;
    color: var(--color-primary);
    margin-bottom: 2px;
}

.contact-item a:hover {
    color: var(--color-secondary);
}

.contact-form {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: var(--font-family);
    font-size: 1rem;
    border: 2px solid var(--color-gray-light);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form .btn {
    width: 100%;
    margin-top: var(--spacing-xs);
}

/* Alertas de notificación */
.alert {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert svg {
    flex-shrink: 0;
}

.alert span {
    flex: 1;
}

.alert-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s;
    line-height: 1;
    padding: 0;
    margin-left: var(--spacing-sm);
}

.alert-close:hover {
    opacity: 1;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-success svg {
    stroke: #28a745;
}

.alert-success .alert-close {
    color: #155724;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-error svg {
    stroke: #dc3545;
}

.alert-error .alert-close {
    color: #721c24;
}

/* ===== Footer ===== */
.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: var(--spacing-md);
}

.footer-brand .logo-text {
    color: var(--color-white);
}

.footer-brand p {
    opacity: 0.7;
    font-size: 0.9rem;
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-white);
    transition: var(--transition);
}

.footer-social a:hover {
    background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
    transform: scale(1.1);
}

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

.footer-links a {
    opacity: 0.7;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-secondary);
}

.footer-bottom {
    text-align: center;
    opacity: 0.6;
    font-size: 0.9rem;
}

/* ===== WhatsApp Flotante ===== */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--color-whatsapp);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transition: var(--transition);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    background: #1da851;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        box-shadow: var(--shadow);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .whatsapp-float {
        bottom: 20px;
        right: 20px;
        width: 55px;
        height: 55px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

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

    .about-features {
        grid-template-columns: 1fr;
    }
}

/* ===== Animaciones de carga ===== */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Header animación */
.header {
    animation: fadeInDown 0.6s ease-out;
}

/* Hero animaciones */
.hero h1 {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.3s forwards;
}

.hero p {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.5s forwards;
}

.hero .btn {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.7s forwards;
}

/* Animaciones en scroll */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Delays escalonados para grids */
.service-card.animate-on-scroll:nth-child(1) { transition-delay: 0.1s; }
.service-card.animate-on-scroll:nth-child(2) { transition-delay: 0.2s; }
.service-card.animate-on-scroll:nth-child(3) { transition-delay: 0.3s; }
.service-card.animate-on-scroll:nth-child(4) { transition-delay: 0.4s; }
.service-card.animate-on-scroll:nth-child(5) { transition-delay: 0.5s; }
.service-card.animate-on-scroll:nth-child(6) { transition-delay: 0.6s; }

.feature.animate-on-scroll:nth-child(1) { transition-delay: 0.1s; }
.feature.animate-on-scroll:nth-child(2) { transition-delay: 0.2s; }
.feature.animate-on-scroll:nth-child(3) { transition-delay: 0.3s; }

.client-logo.animate-on-scroll:nth-child(1) { transition-delay: 0.05s; }
.client-logo.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.client-logo.animate-on-scroll:nth-child(3) { transition-delay: 0.15s; }
.client-logo.animate-on-scroll:nth-child(4) { transition-delay: 0.2s; }
.client-logo.animate-on-scroll:nth-child(5) { transition-delay: 0.25s; }
.client-logo.animate-on-scroll:nth-child(6) { transition-delay: 0.3s; }
.client-logo.animate-on-scroll:nth-child(7) { transition-delay: 0.35s; }

/* Section titles animación */
.section-title.animate-on-scroll {
    transform: translateY(30px);
}

/* Contact animaciones */
.contact-info.animate-on-scroll {
    transform: translateX(-40px);
}

.contact-info.animate-on-scroll.visible {
    transform: translateX(0);
}

.contact-form.animate-on-scroll {
    transform: translateX(40px);
}

.contact-form.animate-on-scroll.visible {
    transform: translateX(0);
}

/* WhatsApp float animación */
.whatsapp-float {
    animation: scaleIn 0.5s ease-out 1s forwards;
    opacity: 0;
}

/* Reducir animaciones si el usuario lo prefiere */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}