:root {
    /* Colores base */
    --color-primary: #6C63FF;
    --color-primary-dark: #564FD8;
    --color-secondary: #FF6584;
    --color-tertiary: #42E2B8;
    
    /* Escala de grises */
    --color-gray-900: #1A1A2E;
    --color-gray-800: #2D2D44;
    --color-gray-700: #4A4A6A;
    --color-gray-600: #6E6E8F;
    --color-gray-500: #9A9AB8;
    --color-gray-400: #C7C7D9;
    --color-gray-300: #E2E2ED;
    --color-gray-200: #F0F0F5;
    --color-gray-100: #F8F8FA;
    --color-white: #FFFFFF;
    
    /* Semánticos */
    --color-text: var(--color-gray-900);
    --color-text-light: var(--color-gray-700);
    --color-background: var(--color-white);
    --color-surface: var(--color-gray-100);
    --color-border: var(--color-gray-300);
    
    /* Tamaños */
    --max-width: 1440px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 50px rgba(0,0,0,0.15);
    
    /* Tipografía */
    --font-sans: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'SF Mono', 'Roboto Mono', monospace;
    --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 */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
}

/* Dark Mode */
[data-theme="dark"] {
    --color-text: var(--color-gray-100);
    --color-text-light: var(--color-gray-400);
    --color-background: var(--color-gray-900);
    --color-surface: var(--color-gray-800);
    --color-border: var(--color-gray-700);
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.3);
    --shadow-xl: 0 20px 50px rgba(0,0,0,0.4);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    transition: background-color 0.3s ease;
}

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

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* Tipografía */
h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

h1 {
    font-size: var(--text-5xl);
}

h2 {
    font-size: var(--text-4xl);
}

h3 {
    font-size: var(--text-3xl);
}

p {
    margin-bottom: var(--space-md);
    color: var(--color-text-light);
}

.text-gradient {
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Header */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--space-md) 0;
    background-color: rgba(var(--color-background), 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

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

.brand img {
    height: 40px;
    width: auto;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
}

.main-nav a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    position: relative;
    padding: var(--space-xs) 0;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

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

/* Hero Section */
.hero-section {
    position: relative;
    padding: calc(var(--space-3xl) * 2) 0 var(--space-3xl);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.1) 0%, rgba(66, 226, 184, 0.1) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    margin-bottom: var(--space-xl);
}

.hero-subtitle {
    font-size: var(--text-xl);
    margin-bottom: var(--space-2xl);
}

/* Formulario de búsqueda */
.domain-search-form {
    margin-bottom: var(--space-xl);
}

.search-input-group {
    display: flex;
    margin-bottom: var(--space-md);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: box-shadow 0.3s ease;
}

.search-input-group:focus-within {
    box-shadow: var(--shadow-lg);
}

.search-input-group input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    border: none;
    font-size: var(--text-lg);
    background-color: var(--color-surface);
    color: var(--color-text);
}

.search-input-group input::placeholder {
    color: var(--color-gray-500);
}

.search-button {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0 var(--space-xl);
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.search-button:hover {
    background-color: var(--color-primary-dark);
}

.search-button svg {
    width: 20px;
    height: 20px;
}

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

.option-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.option-group input {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
}

.popular-tlds {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-base);
}

.popular-tlds span {
    color: var(--color-gray-600);
}

.popular-tlds a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.popular-tlds a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Features Section */
.features-section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-title span {
    color: var(--color-primary);
}

.section-subtitle {
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.feature-card {
    padding: var(--space-xl);
    background-color: var(--color-surface);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(var(--color-primary), 0.1);
    border-radius: 50%;
    margin-bottom: var(--space-lg);
    color: var(--color-primary);
}

.feature-card h3 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-sm);
}

/* Demo Section */
.demo-section {
    padding: var(--space-3xl) 0;
    background-color: var(--color-primary);
    color: var(--color-white);
    text-align: center;
}

.demo-content h2 {
    margin-bottom: var(--space-md);
}

.demo-content p {
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background-color: var(--color-white);
    color: var(--color-primary);
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Footer */
.main-footer {
    background-color: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--space-3xl) 0;
}

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

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

/* Responsive */
@media (max-width: 1024px) {
    .hero-section .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
        margin-bottom: var(--space-2xl);
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .search-options {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Tema oscuro/claro */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.sun-icon,
.moon-icon {
    position: absolute;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

[data-theme="light"] .moon-icon {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(90deg);
}