/**
 * Main Stylesheet - DataLab UERJ
 * Design profissional baseado no site original
 */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;700&family=Inter:wght@300;400;500;600;700&display=swap');
@import url('theme.css');

/* ============================================
   RESET & NORMALIZATION
   ============================================ */

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

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY - Profissional e Elegante
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  margin-bottom: var(--spacing-lg);
  color: var(--color-primary);
}

/* Títulos principais em Serif elegante */
h1 {
  font-family: var(--font-serif);
  font-size: var(--font-size-6xl);
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-xl);
  line-height: 1.2;
}

h2 {
  font-family: var(--font-serif);
  font-size: var(--font-size-5xl);
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-top: var(--spacing-3xl);
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-family: var(--font-serif);
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: -0.005em;
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
}

h5 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

h6 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-base);
  line-height: 1.75;
  color: var(--color-text);
}

small, .text-small {
  font-size: var(--font-size-small);
  color: var(--color-text-light);
}

/* ============================================
   LINKS & INTERACTIONS
   ============================================ */

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-base);
  position: relative;
}

a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

a:visited {
  color: var(--color-link-visited);
}

a:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ============================================
   LISTS
   ============================================ */

ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   CODE & PREFORMATTED
   ============================================ */

code {
  font-family: var(--font-mono);
  background-color: var(--color-bg-section);
  padding: 2px 6px;
  border-radius: var(--radius);
  font-size: 0.9em;
  color: var(--color-primary);
}

pre {
  background-color: var(--color-bg-section);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-lg);
}

pre code {
  background: none;
  padding: 0;
}

/* ============================================
   BUTTONS
   ============================================ */

button, .btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  text-align: center;
  font-family: var(--font-primary);
}

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

.btn-primary:hover {
  background-color: var(--color-primary-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: rgba(74, 139, 110, 0.05);
}

/* ============================================
   FORMS
   ============================================ */

input, textarea, select {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-light);
  color: var(--color-text);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(74, 139, 110, 0.1);
}

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

/* ============================================
   LAYOUT CONTAINERS
   ============================================ */

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

.section {
  padding: var(--spacing-3xl) 0;
}

.section-alt {
  background-color: var(--color-bg-section);
  padding: var(--spacing-3xl) 0;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  transition: transform var(--transition-base);
}

.logo:hover {
  transform: translateX(-2px);
}

.logo-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: 1;
}

.logo-subtitle {
  font-size: var(--font-size-small);
  color: var(--color-text-light);
  font-weight: var(--font-weight-regular);
}

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

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
}

.logo-image {
  width: 48px;
  height: auto;
  object-fit: contain;
  display: block;
}

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

nav a {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  position: relative;
  padding: var(--spacing-sm) 0;
  transition: color var(--transition-base);
}

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

nav a:hover {
  color: var(--color-accent);
}

nav a:hover::after {
  width: 100%;
}

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

nav a.active::after {
  width: 100%;
  background-color: var(--color-primary);
}

.header-lang-selector {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background-color: var(--color-bg-dark);
  color: var(--color-bg-light);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-3xl);
}

footer a {
  color: var(--color-accent-light);
  transition: color var(--transition-base);
}

footer a:hover {
  color: var(--color-bg-light);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-col h4 {
  color: white;
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  font-weight: var(--font-weight-bold);
}

.footer-col ul {
  list-style: none;
  margin: 0;
}

.footer-col li {
  margin-bottom: var(--spacing-sm);
}

.footer-col p {
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.7);
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.footer-logo-image {
  width: 48px;
  height: auto;
  object-fit: contain;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  font-size: var(--font-size-small);
  color: var(--color-text-lighter);
}

/* ============================================
   CARDS & BOXES
   ============================================ */

.card {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.card-title {
  font-family: var(--font-serif);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.card-content {
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  line-height: 1.7;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  padding: var(--spacing-4xl) 0;
  text-align: center;
  background: linear-gradient(135deg, rgba(232, 238, 245, 0.5) 0%, rgba(232, 238, 245, 0.3) 100%);
  border-bottom: 1px solid var(--color-border-light);
}

.hero h1 {
  margin-bottom: var(--spacing-lg);
  color: var(--color-primary);
}

.hero p {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

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

.hero-visual {
  margin: var(--spacing-2xl) 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* ============================================
   GRID & LAYOUT
   ============================================ */

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

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

.flex-col {
  flex-direction: column;
}

.flex-center {
  align-items: center;
  justify-content: center;
}

/* ============================================
   UTILITIES
   ============================================ */

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

.text-right {
  text-align: right;
}

.text-left {
  text-align: left;
}

.text-muted {
  color: var(--color-text-lighter);
}

.text-primary {
  color: var(--color-primary);
}

.text-accent {
  color: var(--color-accent);
}

.mt {
  margin-top: var(--spacing-lg);
}

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

.mt-lg {
  margin-top: var(--spacing-2xl);
}

.mb-lg {
  margin-bottom: var(--spacing-2xl);
}

.px {
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}

.py {
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}

.hidden {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ============================================
   BREADCRUMBS
   ============================================ */

.breadcrumb {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-small);
  color: var(--color-text-light);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  margin: 0;
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  margin-left: var(--spacing-sm);
  color: var(--color-text-lighter);
}

.breadcrumb a {
  color: var(--color-primary);
}

/* ============================================
   SKIP LINK
   ============================================ */

.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  z-index: 100;
}

.skip-to-content:focus {
  top: 0;
}

/* ============================================
   DIVIDER & VISUAL ELEMENTS
   ============================================ */

hr {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin: var(--spacing-2xl) 0;
}

.divider {
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent) 0%, transparent 100%);
  margin: var(--spacing-lg) 0;
}

/* ============================================
   BLOG POST STYLES
   ============================================ */

.post-article {
  padding: var(--spacing-2xl) 0;
}

.post-header {
  border-bottom: 2px solid var(--color-border-light);
  padding-bottom: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.post-meta {
  font-size: var(--font-size-small);
  color: var(--color-text-light);
}

.post-content {
  font-size: var(--font-size-base);
  line-height: 1.8;
  max-width: 850px;
}

.post-content h2 {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  color: var(--color-primary);
  border-top: 1px solid var(--color-border-light);
}

.post-footer {
  background-color: var(--color-bg-section);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

/* ============================================
   NAVIGATION TOGGLE (Mobile)
   ============================================ */

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  color: var(--color-primary);
  font-size: var(--font-size-lg);
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.fade-in {
  animation: fadeIn var(--transition-slow) ease;
}

.slide-in {
  animation: slideInRight var(--transition-slow) ease;
}

/* ============================================
   ICON & GRAPHIC ELEMENTS
   ============================================ */

.icon-element {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-section);
  color: var(--color-primary);
  font-size: var(--font-size-2xl);
}

.icon-element.accent {
  background-color: rgba(74, 139, 110, 0.1);
  color: var(--color-accent);
}