/* ============================================
   VARIABLES CSS - Fácil personalización
   ============================================ */
:root {
    /* Colores de marca - EDITABLES (Estilo Apple) */
    --color-primary: #007AFF;
    --color-primary-dark: #0056b3;
    --color-primary-light: #5AC8FA;
    
    --color-secondary: #1C1C1E;
    --color-secondary-light: #2C2C2E;
    
    --color-accent: #34C759;
    
    /* Colores neutros (Apple-like) */
    --color-white: #ffffff;
    --color-gray-50: #F5F5F7;
    --color-gray-100: #E8E8ED;
    --color-gray-200: #D1D1D6;
    --color-gray-300: #C7C7CC;
    --color-gray-400: #8E8E93;
    --color-gray-500: #636366;
    --color-gray-600: #48484A;
    --color-gray-700: #3A3A3C;
    --color-gray-800: #2C2C2E;
    --color-gray-900: #1C1C1E;
    
    /* Tipografía */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Bordes */
    --border-radius-sm: 0.5rem;
    --border-radius-md: 0.75rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    --border-radius-full: 9999px;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Container */
    --container-max-width: 1200px;
    --container-padding: var(--spacing-md);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    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 {
    color: inherit;
    text-decoration: none;
}

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

ul, ol {
    list-style: none;
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    transition: box-shadow var(--transition-base);
}

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

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--container-padding);
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

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

.logo-text {
    display: block;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-gray-600);
    transition: color var(--transition-fast);
    position: relative;
}

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

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

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

.nav-link:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: 2px;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--spacing-3xl) + var(--spacing-xl)) 0 var(--spacing-3xl);
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-gray-50) 100%);
    overflow: hidden;
    border-bottom: 1px solid var(--color-gray-200);
}

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

.hero-content {
    text-align: center;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.1;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.hero-image-wrapper {
    position: relative;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    aspect-ratio: 4/3;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.hero-image:hover .hero-img {
    transform: scale(1.05);
}

.hero-bg-decoration {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 200%;
    background: radial-gradient(ellipse, var(--color-primary-light) 0%, transparent 70%);
    opacity: 0.05;
    pointer-events: none;
    z-index: 0;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
    text-align: center;
    white-space: nowrap;
}

.btn-icon {
    width: 1.25rem;
    height: 1.25rem;
    flex-shrink: 0;
}

.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);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

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

.btn-secondary {
    background-color: var(--color-white);
    color: var(--color-gray-700);
    border: 2px solid var(--color-gray-300);
}

.btn-secondary:hover {
    border-color: var(--color-gray-400);
    background-color: var(--color-gray-50);
    transform: translateY(-2px);
}

.btn-secondary:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.btn-whatsapp-large {
    background-color: #25D366;
    color: var(--color-white);
    font-size: 1.25rem;
    padding: var(--spacing-md) var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.btn-whatsapp-large:hover {
    background-color: #20bd5a;
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-whatsapp-large:focus {
    outline: 2px solid #25D366;
    outline-offset: 4px;
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-gray-50) 100%);
    border-bottom: 1px solid var(--color-gray-200);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-500);
}

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

.service-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

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

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    transition: transform var(--transition-base);
}

.service-card:hover .service-icon {
    transform: scale(1.1);
}

.service-icon svg {
    width: 2rem;
    height: 2rem;
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.service-description {
    font-size: 1rem;
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.contact-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    align-items: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gray-600);
}

.contact-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact-text {
    font-size: 1rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--color-gray-900);
    color: var(--color-gray-400);
    padding: 1rem 0;
    text-align: center;
}

.footer-section {
    margin-bottom: 0.75rem;
}

.footer-title {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--color-white);
}

.social {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-link img {
    width: 24px;
    height: 24px;
    transition: transform 0.3s;
}

.social-link:hover img {
    transform: scale(1.1);
}

.fancy {
    display: inline-block;
    text-decoration: none;
    color: var(--color-gray-500);
    font-size: 0.8rem;
    margin: 0.5rem 0;
    transition: color 0.3s;
    position: relative;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-800) 100%);
    border: 1px solid var(--color-gray-700);
    animation: fancyGlow 3s ease-in-out infinite;
}

@keyframes fancyGlow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(0, 122, 255, 0.3), 0 0 10px rgba(0, 122, 255, 0.2);
        border-color: var(--color-gray-700);
    }
    50% {
        box-shadow: 0 0 15px rgba(0, 122, 255, 0.5), 0 0 25px rgba(0, 122, 255, 0.3);
        border-color: var(--color-primary);
    }
}

.fancy .text {
    position: relative;
    z-index: 2;
    background: linear-gradient(90deg, var(--color-gray-500), var(--color-primary), var(--color-gray-500));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textShine 3s linear infinite;
}

@keyframes textShine {
    to {
        background-position: 200% center;
    }
}

.fancy:hover {
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(0, 122, 255, 0.6), 0 0 30px rgba(0, 122, 255, 0.4);
    border-color: var(--color-primary-light);
}

.fancy:hover .text {
    background: linear-gradient(90deg, var(--color-white), var(--color-primary-light), var(--color-white));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textShine 1.5s linear infinite;
}

.footer-copyright {
    font-size: 0.75rem;
    color: var(--color-gray-600);
    margin-top: 0.5rem;
}

/* ============================================
   WHATSAPP FLOAT BUTTON
   ============================================ */
.whatsapp-float {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3.5rem;
    height: 3.5rem;
    background-color: #25D366;
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
    transition: all var(--transition-base);
    z-index: 1000;
}

.whatsapp-float svg {
    width: 2rem;
    height: 2rem;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
    background-color: #20bd5a;
}

.whatsapp-float:focus {
    outline: 3px solid #25D366;
    outline-offset: 3px;
}

/* ============================================
   CONTACT FORM
   ============================================ */
.contact-form {
    max-width: 500px;
    margin: var(--spacing-xl) auto 0;
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-gray-200);
}

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

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-xs);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-family: inherit;
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    background-color: var(--color-white);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-gray-400);
}

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

.btn-full {
    width: 100%;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-up {
    opacity: 0;
    animation: fadeUp 0.6s ease forwards;
}

.fade-up.visible {
    opacity: 1;
    animation: none;
}

/* ============================================
   RESPONSIVE - TABLET
   ============================================ */
@media (min-width: 768px) {
    :root {
        --container-padding: var(--spacing-lg);
    }
    
    .hero-container {
        grid-template-columns: 1fr 1fr;
        text-align: left;
    }
    
    .hero-content {
        text-align: left;
    }
    
    .hero-subtitle {
        margin-left: 0;
        margin-right: 0;
    }
    
    .hero-buttons {
        flex-direction: row;
        justify-content: flex-start;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-info {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
    }
}

/* ============================================
   RESPONSIVE - DESKTOP
   ============================================ */
@media (min-width: 1024px) {
    :root {
        --container-padding: var(--spacing-xl);
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .service-card {
        padding: var(--spacing-2xl);
    }
}

/* ============================================
   ACCESSIBILITY - FOCUS VISIBLE
   ============================================ */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--spacing-sm);
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .header,
    .btn,
    .hero-bg-decoration {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding: var(--spacing-lg) 0;
    }
    
    body {
        font-size: 12pt;
    }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .fade-up {
        opacity: 1;
        animation: none;
    }
    
    html {
        scroll-behavior: auto;
    }
}