/* ================================
   Variables CSS
   ================================ */
:root {
    /* Colores */
    --color-primary: #0284c7;
    --color-secondary: #1e293b;
    --color-accent: #0369a1;
    --color-bg: #0f172a;
    --color-bg-light: #1e293b;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-white: #ffffff;

    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, #1e293b 0%, #0284c7 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0284c7 100%);
    --gradient-card: linear-gradient(135deg, rgba(2, 132, 199, 0.1) 0%, rgba(3, 105, 161, 0.05) 100%);

    /* Tipografía */
    --font-display: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;

    /* Espaciado (8pt grid) */
    --spacing-unit: 8px;
    --spacing-xs: calc(var(--spacing-unit) * 1);
    --spacing-sm: calc(var(--spacing-unit) * 2);
    --spacing-md: calc(var(--spacing-unit) * 3);
    --spacing-lg: calc(var(--spacing-unit) * 4);
    --spacing-xl: calc(var(--spacing-unit) * 6);
    --spacing-2xl: calc(var(--spacing-unit) * 8);
    --spacing-3xl: calc(var(--spacing-unit) * 12);

    /* Otros */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(6, 182, 212, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

.hidden {
    display: none !important;
}

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

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* ================================
   Header
   ================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(6, 182, 212, 0.1);
}

.header.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: var(--shadow-lg);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-md);
    padding-bottom: var(--spacing-md);
}

.logo svg {
    display: block;
}

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

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

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

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

@media (max-width: 768px) {
    .nav {
        gap: var(--spacing-sm);
    }

    .nav-link {
        font-size: var(--font-size-sm);
    }

    .logo svg {
        width: 100px;
        height: 30px;
    }
}

/* ================================
   Buttons
   ================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

.btn-block {
    width: 100%;
}

/* ================================
   Hero Section
   ================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: calc(80px + var(--spacing-2xl));
    padding-bottom: var(--spacing-3xl);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
    animation: gradientShift 15s ease infinite;
    z-index: -2;
}

@keyframes gradientShift {
    0%, 100% {
        background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #0f172a 100%);
    }
    50% {
        background: linear-gradient(135deg, #1e293b 0%, #0f172a 50%, #1e293b 100%);
    }
}

/* Hero Illustration */
.hero-illustration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    opacity: 0.4;
    pointer-events: none;
}

.hero-illustration svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Pulse animation para anillos */
@keyframes pulse {
    0% {
        r: 25;
        opacity: 0.6;
    }
    50% {
        r: 35;
        opacity: 0.2;
    }
    100% {
        r: 25;
        opacity: 0.6;
    }
}

.pulse-ring {
    animation: pulse 3s ease-in-out infinite;
}

/* Animaciones para elementos flotantes */
.floating-elements > * {
    animation: floatElement 6s ease-in-out infinite;
}

.floating-elements > *:nth-child(2) {
    animation-delay: 2s;
}

.floating-elements > *:nth-child(3) {
    animation-delay: 4s;
}

@keyframes floatElement {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-15px);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.gradient-text {
    background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-2xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-cta {
    margin-top: var(--spacing-2xl);
}

/* Floating shapes */
.floating-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: -1;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.1) 0%, transparent 70%);
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    top: 60%;
    right: 10%;
    animation-delay: 5s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    bottom: 20%;
    left: 50%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-30px) scale(1.1);
    }
}

@media (max-width: 1024px) {
    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 768px) {
    .hero {
        min-height: 90vh;
        padding-top: calc(60px + var(--spacing-xl));
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .btn-lg {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-base);
    }
}

/* ================================
   Servicios Section
   ================================ */
.servicios {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.servicios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

@media (max-width: 1024px) {
    .servicios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.service-card {
    background: var(--gradient-card);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.service-icon {
    margin-bottom: var(--spacing-lg);
}

.service-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.service-description {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.service-benefits {
    list-style: none;
    padding: 0;
}

.service-benefits li {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    position: relative;
    color: var(--color-text);
}

.service-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

@media (max-width: 768px) {
    .servicios-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .service-card {
        padding: var(--spacing-lg);
    }

    .hero-illustration {
        opacity: 0.25;
    }
}

/* ================================
   Contacto Section
   ================================ */
.contacto {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-light);
}

.contacto-wrapper {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
}

.contacto-form-container {
    background: var(--gradient-card);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    backdrop-filter: blur(10px);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-weight: 600;
    color: var(--color-text);
    font-size: var(--font-size-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: var(--border-radius-sm);
    background: rgba(15, 23, 42, 0.5);
    color: var(--color-text);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

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

.form-message {
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    margin-top: var(--spacing-md);
    font-weight: 500;
}

.form-message.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
}

.form-message.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* Contact Info */
.contacto-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

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

.info-item svg {
    flex-shrink: 0;
    color: var(--color-primary);
    margin-top: 4px;
}

.info-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.info-item p,
.info-item a {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.info-item a:hover {
    color: var(--color-primary);
}

@media (max-width: 768px) {
    .contacto-wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .contacto-form-container {
        padding: var(--spacing-lg);
    }
}

/* ================================
   Footer
   ================================ */
.footer {
    background: var(--color-bg);
    border-top: 1px solid rgba(6, 182, 212, 0.1);
    padding: var(--spacing-2xl) 0;
}

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

.footer-info {
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ================================
   Animations
   ================================ */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

.fade-in:nth-child(1) { animation-delay: 0.2s; }
.fade-in:nth-child(2) { animation-delay: 0.4s; }
.fade-in:nth-child(3) { animation-delay: 0.6s; }

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ================================
   Utility Classes
   ================================ */
@media (max-width: 768px) {
    .hidden-mobile {
        display: none !important;
    }
}

@media (min-width: 769px) {
    .hidden-desktop {
        display: none !important;
    }
}