/* ============================================
   CAA Solution - Estilos Globais
   ============================================ */

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

/* CSS Variables - Design System */
:root {
  /* Cores - Paleta Neutra Elegante */
  --bg-primary: #ffffff;
  --bg-secondary: #fafafa;
  --bg-dark: #0a0a0a;
  --text-primary: #1a1a1a;
  --text-secondary: #6b6b6b;
  --text-light: #ffffff;
  --accent-color: #4a4a4a;
  --accent-hover: #2a2a2a;
  --border-color: #e8e8e8;
  --border-dark: #2a2a2a;
  
  /* Espaçamentos */
  --container-max: 1200px;
  --section-padding-desktop: 3rem;
  --section-padding-mobile: 2.5rem;
  --gap-small: 1.5rem;
  --gap-medium: 2rem;
  --gap-large: 4rem;
  
  /* Tipografia */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 1rem;
  --line-height-base: 1.7;
  --line-height-heading: 1.25;
  
  /* Transições */
  --transition-base: 0.25s ease;
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base */
html {
  scroll-behavior: smooth;
}

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

/* Tipografia */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: var(--line-height-heading);
  margin-bottom: 1rem;
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
  font-weight: 400;
  letter-spacing: -0.03em;
}

h2 {
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

/* Layout */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: var(--section-padding-desktop) 0;
}

@media (max-width: 768px) {
  .section {
    padding: var(--section-padding-mobile) 0;
  }
}

/* Skip Link - Acessibilidade */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  z-index: 1000;
  border-radius: 0 0 4px 0;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--accent-color);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 999;
  border-bottom: 1px solid var(--border-color);
}

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo:hover,
.logo:focus {
  color: var(--accent-color);
  outline: none;
}

/* Navigation Desktop */
nav {
  display: flex;
  align-items: center;
  gap: var(--gap-medium);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--gap-medium);
  align-items: center;
}

.nav-menu a {
  color: var(--text-primary);
  font-weight: 400;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: color var(--transition-base);
  font-size: 0.95rem;
}

.nav-menu a:hover,
.nav-menu a:focus {
  color: var(--accent-color);
  outline: none;
}

/* Menu Mobile */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 4px;
}

.menu-toggle:hover,
.menu-toggle:focus {
  background-color: var(--bg-secondary);
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

@media (max-width: 1024px) {
  .menu-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: 2rem;
    gap: 1rem;
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }
  
  .nav-menu.active {
    transform: translateX(0);
  }
  
  .nav-menu a {
    display: block;
    width: 100%;
    text-align: center;
    padding: 1rem;
  }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 4rem 0 4rem;
  margin-top: 70px;
  text-align: center;
}

.hero h1 {
  color: var(--text-light);
  font-size: 3rem;
  margin-bottom: 1.5rem;
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1.2;
}

.hero .subheadline {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 2.5rem;
  font-weight: 300;
  letter-spacing: 0;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.hero-ctas {
  display: flex;
  gap: var(--gap-medium);
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .hero {
    padding: 10rem 0 6rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero .subheadline {
    font-size: 1rem;
  }
}

/* ============================================
   BUTTONS & CTAs
   ============================================ */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: 4px;
  font-weight: 500;
  text-align: center;
  transition: all var(--transition-base);
  cursor: pointer;
  border: 1px solid transparent;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--text-primary);
  color: var(--text-light);
  border-color: var(--text-primary);
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--text-light);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  outline: none;
}

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

.btn-secondary:hover,
.btn-secondary:focus {
  background: var(--text-light);
  color: var(--bg-dark);
  outline: none;
}

.btn-outline {
  background: transparent;
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.btn-outline:hover,
.btn-outline:focus {
  background: var(--accent-color);
  color: var(--text-light);
  outline: none;
}

/* ============================================
   CARDS
   ============================================ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  margin-top: 4rem;
}

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 2.5rem;
  transition: all var(--transition-smooth);
  position: relative;
  z-index: 1;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  border-color: var(--text-primary);
  border-width: 2px;
}

.card h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-weight: 500;
  font-size: 1.375rem;
}

.card p {
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  line-height: 1.75;
  font-size: 0.95rem;
}

/* Cards em seção escura */
.section-dark {
  background: var(--bg-dark);
  color: var(--text-light);
}

.section-dark .card {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-dark);
}

.section-dark .card h3 {
  color: var(--text-light);
}

.section-dark .card p {
  color: rgba(255, 255, 255, 0.8);
}

.section-dark h2 {
  color: var(--text-light);
}

/* ============================================
   PROJECT CARDS
   ============================================ */
.project-card {
  position: relative;
  cursor: pointer;
  text-decoration: none;
  display: block;
  color: inherit;
  z-index: 1;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
}

.project-card,
.project-card:hover,
.project-card:focus {
  text-decoration: none;
  color: inherit;
  outline: none;
}

.project-card:hover .card,
.project-card:focus .card {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  border-color: var(--text-primary);
  border-width: 2px;
}

.project-client {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-weight: 400;
}

.project-badge {
  display: inline-block;
  background: var(--text-primary);
  color: var(--text-light);
  padding: 0.25rem 0.75rem;
  border-radius: 2px;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.project-tech span {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 0.375rem 0.875rem;
  border-radius: 2px;
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.01em;
}

.section-dark .project-tech {
  border-top-color: var(--border-dark);
}

.section-dark .project-tech span {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-light);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 5rem 0 2.5rem;
  margin-top: 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--gap-large);
  margin-bottom: 3rem;
}

.footer-column h4 {
  color: var(--text-light);
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.footer-column ul {
  list-style: none;
}

.footer-column ul li {
  margin-bottom: 0.75rem;
}

.footer-column a {
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-base);
  font-size: 0.9rem;
}

.footer-column a:hover,
.footer-column a:focus {
  color: var(--text-light);
  outline: none;
}

.footer-bottom {
  border-top: 1px solid var(--border-dark);
  padding-top: 2rem;
  text-align: center;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom p {
  margin-bottom: 0.5rem;
}

/* ============================================
   FORMULÁRIO
   ============================================ */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.form-notice {
  background: rgba(37, 99, 235, 0.1);
  border-left: 3px solid var(--accent-color);
  padding: 1rem;
  margin-bottom: 1.5rem;
  border-radius: 4px;
  color: var(--text-primary);
}

.section-dark .form-notice {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-light);
  border-left-color: var(--text-light);
}

.section-dark .form-group label {
  color: var(--text-light);
}

.section-dark .form-group input,
.section-dark .form-group textarea {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-dark);
  color: var(--text-light);
}

.section-dark .form-group input::placeholder,
.section-dark .form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   CONTATO INFO
   ============================================ */
.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--gap-large);
  margin-bottom: 3rem;
}

.contact-item {
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-radius: 8px;
  border-left: 3px solid var(--accent-color);
}

.contact-item h3 {
  margin-bottom: 0.5rem;
  font-size: 1.125rem;
}

.contact-item a {
  color: var(--accent-color);
  font-weight: 500;
}

.contact-item a:hover {
  color: var(--accent-hover);
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.section-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.section-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Animação para cards com delay escalonado */
.cards-grid .card {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

/* Aplicar animação apenas se JavaScript estiver ativo */
html.js-enabled .cards-grid .card {
  opacity: 0;
  transform: translateY(20px);
}

html.js-enabled .cards-grid .card.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Fallback: garantir visibilidade no mobile mesmo sem JS ou se observer falhar */
@media (max-width: 768px) {
  .cards-grid .card,
  html.js-enabled .cards-grid .card,
  html.js-enabled .cards-grid .card.visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
    visibility: visible !important;
  }
  
  /* Garantir que os cards sejam clicáveis no mobile */
  .project-card {
    pointer-events: auto !important;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    touch-action: manipulation;
  }
  
  .card {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    pointer-events: auto !important;
  }
  
  /* Garantir que o texto seja visível */
  .card h3,
  .card p,
  .project-client,
  .project-tech span {
    color: var(--text-primary) !important;
  }
  
  .card p {
    color: var(--text-secondary) !important;
  }
}

.cards-grid .card.visible,
.card.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Delay escalonado para cards */
.cards-grid .card:nth-child(1) { transition-delay: 0.1s; }
.cards-grid .card:nth-child(2) { transition-delay: 0.2s; }
.cards-grid .card:nth-child(3) { transition-delay: 0.3s; }
.cards-grid .card:nth-child(4) { transition-delay: 0.4s; }
.cards-grid .card:nth-child(5) { transition-delay: 0.5s; }
.cards-grid .card:nth-child(6) { transition-delay: 0.6s; }

.cards-grid .card.visible:nth-child(1) { transition-delay: 0.1s; }
.cards-grid .card.visible:nth-child(2) { transition-delay: 0.2s; }
.cards-grid .card.visible:nth-child(3) { transition-delay: 0.3s; }
.cards-grid .card.visible:nth-child(4) { transition-delay: 0.4s; }
.cards-grid .card.visible:nth-child(5) { transition-delay: 0.5s; }
.cards-grid .card.visible:nth-child(6) { transition-delay: 0.6s; }

/* Animação para contact-items */
.contact-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.contact-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Delay escalonado para contact-items */
.contact-info .contact-item:nth-child(1) { transition-delay: 0.1s; }
.contact-info .contact-item:nth-child(2) { transition-delay: 0.2s; }
.contact-info .contact-item:nth-child(3) { transition-delay: 0.3s; }

.contact-info .contact-item.visible:nth-child(1) { transition-delay: 0.1s; }
.contact-info .contact-item.visible:nth-child(2) { transition-delay: 0.2s; }
.contact-info .contact-item.visible:nth-child(3) { transition-delay: 0.3s; }

/* Reduzir preferência de movimento para usuários que preferem menos animação */
@media (prefers-reduced-motion: reduce) {
  .section-animate,
  .cards-grid .card,
  .card,
  .contact-item {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .cards-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--gap-medium);
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.25rem; }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-ctas {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .contact-info {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   PROJECT DETAIL PAGE
   ============================================ */
.project-detail-header {
  padding: 6rem 0 2.5rem;
  margin-top: 70px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.project-detail-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.project-detail-meta {
  display: flex;
  gap: 2rem;
  margin-top: 1rem;
  flex-wrap: wrap;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.project-detail-meta span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.project-detail-content {
  max-width: 900px;
  margin: 0 auto;
}

.project-detail-section {
  margin-bottom: 2.5rem;
}

.project-detail-section h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.project-detail-section p {
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.project-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.project-gallery-item {
  aspect-ratio: 16 / 10;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.project-confidential {
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-left: 3px solid var(--text-primary);
  border-radius: 4px;
  margin-top: 2rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 2rem;
  transition: color var(--transition-base);
}

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

@media (max-width: 768px) {
  .project-detail-header {
    padding: 5rem 0 2rem;
  }
  
  .project-detail-header h1 {
    font-size: 2rem;
  }
  
  .project-gallery {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   WHATSAPP FLOATING BUTTON
   ============================================ */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
  z-index: 1000;
  transition: all var(--transition-smooth);
  text-decoration: none;
  color: var(--text-light);
}

.whatsapp-float:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
  background: #20BA5A;
}

.whatsapp-float:focus {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

.whatsapp-float svg {
  width: 32px;
  height: 32px;
  fill: var(--text-light);
}

@media (max-width: 768px) {
  .whatsapp-float {
    width: 56px;
    height: 56px;
    bottom: 1.5rem;
    right: 1.5rem;
  }
  
  .whatsapp-float svg {
    width: 28px;
    height: 28px;
  }
}