/**
 * Come2Us - Modern CSS Styles
 * Design System & Responsive Layout
 */

/* ========================================
   CSS Variables & Design Tokens
   ======================================== */
:root {
  /* Colors */
  --color-primary: #7c3aed;
  --color-primary-dark: #6d28d9;
  --color-primary-light: #a78bfa;
  --color-secondary: #06b6d4;
  --color-accent: #22d3ee;
  
  --color-bg: #0b1020;
  --color-bg-alt: #11172a;
  --color-surface: #131c34;
  --color-text: #e2e8f0;
  --color-text-light: #94a3b8;
  --color-border: #27324a;
  
  --color-success: #10b981;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Poppins', var(--font-primary);
  
  --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-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Layout */
  --container-width: 1200px;
  --header-height: 70px;
  --border-radius: 8px;
  --border-radius-lg: 16px;
  
  /* 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);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background: radial-gradient(circle at top right, #1d2b52 0%, var(--color-bg) 45%);
  background-color: var(--color-bg);
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul {
  list-style: none;
}

/* ========================================
   Layout Components
   ======================================== */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

/* ========================================
   Header & Navigation
   ======================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 16, 32, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(124, 58, 237, 0.15);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--color-border);
}

.navbar {
  height: var(--header-height);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand .logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

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

.logo-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-weight: 400;
}

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

.nav-brand .logo,
.nav-link {
  color: var(--color-text);
}

.nav-link {
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  position: relative;
}

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

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

.nav-link.btn-contact {
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  color: #ffffff;
  padding: var(--spacing-xs) var(--spacing-lg);
}

.nav-link.btn-contact:hover {
  background: linear-gradient(90deg, var(--color-primary-dark), #0284c7);
  color: #ffffff;
}

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

.hamburger {
  width: 25px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition-base);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: #0f172a;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-link {
    width: 100%;
    text-align: center;
  }
}

/* ========================================
   Main Content
   ======================================== */
.main-content {
  margin-top: var(--header-height);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/></svg>');
  opacity: 0.3;
}

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

.hero-content {
  max-width: 700px;
  margin-bottom: var(--spacing-3xl);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-5xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
}

.hero-title .highlight {
  background: linear-gradient(90deg, #fbbf24, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  opacity: 0.9;
  margin-bottom: var(--spacing-2xl);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-xl);
  max-width: 600px;
}

.stat {
  text-align: center;
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-number {
  display: block;
  font-size: var(--font-size-4xl);
  font-weight: 700;
  font-family: var(--font-heading);
}

.stat-label {
  display: block;
  font-size: var(--font-size-sm);
  opacity: 0.9;
  margin-top: var(--spacing-xs);
}

@media (max-width: 768px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-lg);
  }
  
  .hero-buttons {
    flex-direction: column;
  }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-xl);
  font-weight: 600;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(90deg, var(--color-primary-dark), #0284c7);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: transparent;
  color: white;
  border-color: white;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #e2e8f0;
}

/* ========================================
   Sections
   ======================================== */
section {
  padding: var(--spacing-3xl) 0;
}

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

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

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   Services Section
   ======================================== */
.services {
  background: linear-gradient(180deg, rgba(17, 23, 42, 0.7), rgba(11, 16, 32, 0.9));
}

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

.service-card {
  background: var(--color-surface);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(124, 58, 237, 0.16);
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(30px);
}

.service-card.reveal {
  opacity: 1;
  transform: translateY(0);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.service-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
}

.service-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

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

.service-link {
  color: var(--color-primary);
  font-weight: 600;
  transition: color var(--transition-fast);
}

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

/* ========================================
   Technologies Section
   ======================================== */
.tech-grid {
  display: grid;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-3xl);
}

.tech-item {
  background: var(--color-surface);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(6, 182, 212, 0.15);
  opacity: 0;
  transform: translateX(-30px);
  transition: all var(--transition-base);
}

.tech-item.reveal {
  opacity: 1;
  transform: translateX(0);
}

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

.tech-header h3 {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.tech-category {
  font-size: var(--font-size-sm);
  color: white;
  background: var(--color-primary);
  padding: 4px 12px;
  border-radius: 20px;
}

.tech-bar {
  height: 8px;
  background: var(--color-bg-alt);
  border-radius: 10px;
  overflow: hidden;
}

.tech-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 10px;
  transition: width var(--transition-slow);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: var(--spacing-sm);
}

.tech-percentage {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: white;
}

.tech-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.highlight-box {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.highlight-box h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-lg);
  font-family: var(--font-heading);
}

.highlight-box ul {
  list-style: none;
}

.highlight-box li {
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-lg);
  position: relative;
}

.highlight-box li::before {
  content: '✓';
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* ========================================
   About Section
   ======================================== */
.about {
  background: linear-gradient(180deg, rgba(11, 16, 32, 0.9), rgba(17, 23, 42, 0.65));
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.about-text h2 {
  font-family: var(--font-heading);
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
}

.about-text p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
  font-size: var(--font-size-lg);
}

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

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

.feature-icon {
  width: 24px;
  height: 24px;
  background: var(--color-success);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: bold;
  flex-shrink: 0;
}

.code-preview {
  background: #1e293b;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.code-header {
  background: #334155;
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.code-title {
  margin-left: auto;
  color: #94a3b8;
  font-size: var(--font-size-sm);
}

.code-content {
  padding: var(--spacing-xl);
  color: #e2e8f0;
  font-family: 'Courier New', monospace;
  font-size: var(--font-size-sm);
  line-height: 1.6;
  overflow-x: auto;
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
  }
  
  .about-features {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   Contact Section
   ======================================== */
.contact-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-3xl);
}

.contact-form {
  background: var(--color-surface);
  padding: var(--spacing-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(124, 58, 237, 0.16);
}

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

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: #0d1428;
  transition: border-color var(--transition-fast);
}

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

.form-group input.error,
.form-group textarea.error {
  border-color: var(--color-error);
}

.form-error {
  display: block;
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

.btn-submit {
  width: 100%;
  margin-top: var(--spacing-lg);
}

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

.form-message.success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.form-message.error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

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

.info-card {
  background: var(--color-surface);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(6, 182, 212, 0.2);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-base);
}

.info-card.reveal {
  opacity: 1;
  transform: translateY(0);
}

.info-card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.info-card a {
  color: var(--color-primary);
  font-weight: 500;
}

.info-card a:hover {
  text-decoration: underline;
}

/* reCAPTCHA v3: badge flutuante oculto. O Google permite esconder o badge
   desde que a atribuição apareça de forma visível (.recaptcha-aviso). */
.grecaptcha-badge {
  visibility: hidden;
}

.recaptcha-aviso {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  font-size: 0.75rem;
  line-height: 1.5;
  color: #6b7280;
}

.recaptcha-aviso a {
  color: inherit;
  text-decoration: underline;
}

@media (max-width: 968px) {
  .contact-content {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  background: #1e293b;
  color: #e2e8f0;
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-col h3,
.footer-col h4 {
  color: white;
  margin-bottom: var(--spacing-lg);
  font-family: var(--font-heading);
}

.footer-col p {
  color: #94a3b8;
  line-height: 1.7;
}

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

.footer-col a {
  color: #94a3b8;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: white;
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.social-link {
  width: 40px;
  height: 40px;
  background: #334155;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid #334155;
  color: #94a3b8;
}

.tech-badge {
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: #64748b;
}

/* ========================================
   Chat IA Section
   ======================================== */
.chat-ia {
  background: linear-gradient(180deg, rgba(17, 23, 42, 0.65), rgba(11, 16, 32, 0.9));
}

.chat-ia-wrapper {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(99, 102, 241, 0.2);
  max-width: 480px;
  margin: 0 auto;
  height: 620px;
}

.chat-ia-wrapper iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

@media (max-width: 600px) {
  .chat-ia-wrapper {
    height: 520px;
    border-radius: var(--radius-lg);
  }
}

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

[hidden] {
  display: none !important;
}