/* ==========================================================================
   RTF Informática - Landing Page Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Variables)
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-background: #0f172a;
    --color-surface: #1e293b;
    --color-surface-light: #334155;
    --color-text: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-text-dark: #64748b;
    --color-accent: #3b82f6;
    --color-success: #10b981;
    --color-error: #ef4444;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --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);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Container */
    --container-max: 1200px;
    --container-padding: var(--spacing-6);
}

/* --------------------------------------------------------------------------
   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: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul,
ol {
    list-style: none;
}

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

button {
    cursor: pointer;
    border: none;
    background: none;
}

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

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-surface-light);
}

.btn-secondary:hover {
    background: var(--color-surface);
    border-color: var(--color-primary);
}

.btn-full {
    width: 100%;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-4) 0;
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-surface);
    padding: var(--spacing-3) 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
}

.logo-highlight {
    color: var(--color-primary-light);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    border: 1px solid var(--color-surface-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.lang-toggle:hover {
    color: var(--color-text);
    border-color: var(--color-primary);
}

.lang-icon {
    width: 16px;
    height: 16px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-2);
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-fast);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-20) 0;
    background: linear-gradient(180deg, var(--color-background) 0%, var(--color-surface) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 70% 30%, rgba(37, 99, 235, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    align-items: center;
}

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

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-6);
}

.badge {
    display: inline-flex;
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-primary-light);
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: var(--radius-full);
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-8);
    max-width: 500px;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.hero-visual {
    position: relative;
    z-index: 1;
}

.hero-code {
    background: var(--color-surface);
    border: 1px solid var(--color-surface-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.code-header {
    display: flex;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-background);
    border-bottom: 1px solid var(--color-surface-light);
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-surface-light);
}

.code-dot:nth-child(1) {
    background: #ef4444;
}

.code-dot:nth-child(2) {
    background: #eab308;
}

.code-dot:nth-child(3) {
    background: #22c55e;
}

.code-content {
    padding: var(--spacing-4);
    font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.7;
    overflow-x: auto;
}

.code-content code {
    display: block;
}

.code-keyword {
    color: #c678dd;
}

.code-class {
    color: #e5c07b;
}

.code-string {
    color: #98c379;
}

.code-number {
    color: #d19a66;
}

.code-method {
    color: #61afef;
}

/* --------------------------------------------------------------------------
   Sections Common
   -------------------------------------------------------------------------- */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-12);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Services
   -------------------------------------------------------------------------- */
.services {
    padding: var(--spacing-20) 0;
    background: var(--color-background);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
}

.service-card {
    padding: var(--spacing-8);
    background: var(--color-surface);
    border: 1px solid var(--color-surface-light);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.15);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-6);
}

.service-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary-light);
}

.service-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-3);
}

.service-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-6);
}

.service-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.service-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.service-features li::before {
    content: '';
    flex-shrink: 0;
    width: 6px;
    height: 6px;
    margin-top: 8px;
    background: var(--color-primary);
    border-radius: 50%;
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */
.about {
    padding: var(--spacing-20) 0;
    background: var(--color-surface);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    align-items: start;
}

.about-text .section-title {
    text-align: left;
}

.about-description {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-4);
}

.about-description strong {
    color: var(--color-text);
}

.about-stats {
    display: flex;
    gap: var(--spacing-8);
    margin-top: var(--spacing-8);
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-surface-light);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-primary-light);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.feature {
    display: flex;
    gap: var(--spacing-4);
    padding: var(--spacing-6);
    background: var(--color-background);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-surface-light);
}

.feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-md);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary-light);
}

.feature-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-1);
}

.feature-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Technologies
   -------------------------------------------------------------------------- */
.technologies {
    padding: var(--spacing-20) 0;
    background: var(--color-background);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--spacing-6);
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-6);
    background: var(--color-surface);
    border: 1px solid var(--color-surface-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.tech-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.tech-item svg {
    width: 40px;
    height: 40px;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.tech-item:hover svg {
    color: var(--color-primary-light);
}

.tech-item span {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-align: center;
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */
.contact {
    padding: var(--spacing-20) 0;
    background: var(--color-surface);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-12);
    align-items: start;
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: var(--spacing-4);
}

.contact-description {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-8);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    color: var(--color-text-muted);
}

.contact-item svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary-light);
}

.contact-form {
    background: var(--color-background);
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-surface-light);
}

.form-group {
    margin-bottom: var(--spacing-5);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-2);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-surface-light);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-dark);
}

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

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

.form-notice {
    margin-top: var(--spacing-4);
    font-size: var(--font-size-xs);
    color: var(--color-text-dark);
    text-align: center;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--spacing-16) 0 var(--spacing-8);
    background: var(--color-background);
    border-top: 1px solid var(--color-surface);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-12);
    margin-bottom: var(--spacing-12);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-4);
}

.footer-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    max-width: 300px;
}

.footer-links h4,
.footer-info h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--color-text);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.footer-info p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-2);
}

.footer-bottom {
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-surface);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-text-dark);
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */

/* Tablet */
@media (max-width: 1024px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
    }

    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-10);
    }

    .hero-visual {
        max-width: 500px;
        margin: 0 auto;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-10);
    }

    .tech-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-10);
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-8);
    }

    .footer-brand {
        grid-column: span 2;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --container-padding: var(--spacing-4);
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.25rem;
    }

    .nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-background);
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .nav.active {
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        gap: var(--spacing-6);
        text-align: center;
    }

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

    .menu-toggle {
        display: flex;
        z-index: 1001;
    }

    .hero {
        min-height: auto;
        padding: calc(var(--spacing-20) + 60px) 0 var(--spacing-16);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
    }

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

    .about-stats {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-6);
    }

    .stat {
        flex: 1 1 100px;
    }

    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-4);
    }

    .tech-item {
        padding: var(--spacing-4);
    }

    .tech-item svg {
        width: 32px;
        height: 32px;
    }

    .tech-item span {
        font-size: var(--font-size-xs);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }

    .footer-brand {
        grid-column: auto;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    :root {
        --font-size-5xl: 1.75rem;
        --font-size-4xl: 1.5rem;
    }

    .hero-badges {
        gap: var(--spacing-1);
    }

    .badge {
        font-size: 10px;
        padding: var(--spacing-1) var(--spacing-2);
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .code-content {
        font-size: var(--font-size-xs);
    }
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.hero-visual {
    animation: fadeInUp 0.6s ease forwards;
}

.hero-visual {
    animation-delay: 0.2s;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}