@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --primary: hsl(221, 83%, 53%);
    --primary-dark: hsl(221, 83%, 45%);
    --primary-light: hsl(221, 83%, 95%);
    --slate-50: hsl(210, 40%, 98%);
    --slate-100: hsl(210, 40%, 96%);
    --slate-200: hsl(214, 32%, 91%);
    --slate-300: hsl(212, 33%, 89%);
    --slate-400: hsl(215, 25%, 72%);
    --slate-500: hsl(215, 16%, 47%);
    --slate-600: hsl(215, 19%, 35%);
    --slate-700: hsl(215, 25%, 27%);
    --slate-800: hsl(217, 33%, 17%);
    --slate-900: hsl(222, 47%, 11%);
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--slate-700);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
}

header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--slate-200);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links li {
    display: flex;
    align-items: center;
}

.nav-links a {
    color: var(--slate-600);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    font-size: 0.95rem;
}

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

.language-switcher {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 1rem;
}

.language-switcher a {
    color: var(--slate-500);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    transition: var(--transition);
}

.language-switcher a:hover {
    color: var(--primary);
    background: var(--slate-50);
}

.language-switcher a.active {
    color: var(--primary);
    font-weight: 600;
}

.language-switcher .divider {
    color: var(--slate-300);
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

/* BOFU Layout */
.bofu-page {
    max-width: 1000px;
    margin: 0 auto;
}

.hero-section {
    text-align: center;
    padding: 6rem 1rem 5rem;
    background: radial-gradient(ellipse at 50% 0%, var(--primary-light) 0%, transparent 60%);
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid hsla(221, 83%, 53%, 0.1);
}

.hero-section h1 {
    font-size: 3.25rem;
    line-height: 1.15;
    font-weight: 800;
    margin: 0 0 1.5rem;
    color: var(--slate-900);
    letter-spacing: -0.04em;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--slate-500);
    max-width: 700px;
    margin: 0 auto 2rem;
    line-height: 1.7;
}

.cta-container {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 2.5rem 0;
}

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    font-size: 1rem;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 4px 14px 0 hsla(221, 83%, 53%, 0.39);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.23);
}

/* CTA Aliases for manual user edits */
.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 4px 14px 0 hsla(221, 83%, 53%, 0.39);
    border: none;
    text-decoration: none;
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 hsla(221, 83%, 53%, 0.23);
}

.cta-button-secondary {
    background: var(--white);
    color: var(--slate-700);
    border: 1px solid var(--slate-200);
    box-shadow: var(--shadow-sm);
}

.cta-button-secondary:hover {
    background: var(--slate-50);
    border-color: var(--slate-300);
}

.cta-button-highlight {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: 0 4px 14px 0 hsla(221, 83%, 53%, 0.39), 0 0 20px rgba(37, 99, 235, 0.2);
}

.btn-outline {
    background: var(--white);
    color: var(--slate-600);
    border: 1px solid var(--slate-300);
}

.btn-outline:hover {
    background: var(--slate-50);
    border-color: var(--slate-400);
    color: var(--slate-900);
}

/* Sections */
.content-section,
.quickstart-section,
.faq-section,
.comparison-section,
.when-section,
.features-grid {
    margin: 6rem 0;
    padding-top: 4rem;
    border-top: 1px solid var(--slate-100);
}

h2 {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--slate-900);
    margin-bottom: 2rem;
    letter-spacing: -0.03em;
}

h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 1rem;
}

.content-section p,
.when-section p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--slate-600);
}

.when-section ul {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
}

.when-section li {
    position: relative;
    padding-left: 1.75rem;
    margin-bottom: 1rem;
    font-size: 1.125rem;
    color: var(--slate-600);
}

.when-section li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

/* Cards & Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    padding: 2.5rem;
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 20px;
    transition: var(--transition);
}

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

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    display: block;
}

/* Code Blocks with Tabs */
.code-tabs {
    display: flex;
    flex-direction: column;
    gap: 0;
    background: var(--slate-900);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.code-tabs-header {
    display: flex;
    background: var(--slate-800);
    border-bottom: 1px solid var(--slate-700);
}

.code-tab-btn {
    padding: 1rem 1.5rem;
    background: transparent;
    border: none;
    color: var(--slate-400);
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.code-tab-btn:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.05);
}

.code-tab-btn.active {
    color: var(--white);
    background: var(--slate-900);
}

.code-tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
}

.code-tab-content {
    display: none;
    padding: 0;
}

.code-tab-content.active {
    display: block;
}

.code-tab-content pre {
    margin: 0;
    padding: 1.5rem;
    overflow-x: auto;
}

.code-tab-content code {
    color: #e2e8f0;
    font-family: 'JetBrains Mono', 'Fira Code', 'Monaco', monospace;
    font-size: 0.875rem;
    line-height: 1.7;
}

.code-actions {
    display: flex;
    justify-content: flex-end;
    padding: 0.75rem 1.5rem;
    background: var(--slate-800);
    border-bottom: 1px solid var(--slate-700);
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 6px;
    color: var(--slate-300);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

/* Comparison Table */
.comparison-container {
    overflow-x: auto;
    border-radius: 16px;
    border: 1px solid var(--slate-200);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th {
    background: var(--slate-50);
    color: var(--slate-900);
    font-weight: 700;
    padding: 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--slate-200);
}

.comparison-table td {
    padding: 1.25rem;
    border-bottom: 1px solid var(--slate-100);
    color: var(--slate-600);
}

.comparison-table .highlight {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 700;
}

/* FAQ Section - Estilo español */
.faq-section {
    margin: 6rem 0;
}

.faq-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--slate-900);
}

.faq-item {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--white);
    border-radius: 12px;
    border: 1px solid var(--slate-200);
}

.faq-item h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 0.75rem;
    font-family: 'Inter', sans-serif;
}

.faq-item p {
    color: var(--slate-600);
    line-height: 1.7;
    margin: 0;
    font-size: 1rem;
}

/* Footer */
footer {
    background: var(--slate-900);
    padding: 5rem 2rem 3rem;
    color: var(--slate-400);
    margin-top: 8rem;
}

.footer-links {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 4rem;
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    font-weight: 700;
}

.footer-section a {
    display: block;
    color: var(--slate-400);
    text-decoration: none;
    margin-bottom: 0.75rem;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--primary);
}

.footer-bottom {
    max-width: 1200px;
    margin: 4rem auto 0;
    padding-top: 2rem;
    border-top: 1px solid var(--slate-800);
    text-align: center;
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
    }

    main {
        padding: 2rem 1rem;
    }
}