/* ============================================================================
   🎨 CIRCUIT SAGE 2030 - MAIN STYLESHEET
   Merces Innovation Hub - Modern SaaS Landing & Registration
   ============================================================================ */

/* --- CSS Variables (Design System) --- */
:root {
  /* Colors - Primary */
  --primary-color: #0066ff;
  --primary-dark: #0052cc;
  --primary-light: #3385ff;
  --primary-gradient: linear-gradient(135deg, #0066ff 0%, #00ccff 100%);
  
  /* Colors - Secondary */
  --secondary-color: #00ccff;
  --accent-color: #ff6b00;
  --accent-gradient: linear-gradient(135deg, #ff6b00 0%, #ff9933 100%);
  
  /* Colors - Neutral */
  --dark-bg: #0a0e27;
  --darker-bg: #060920;
  --card-bg: #1a1f3a;
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --text-muted: #718096;
  
  /* Colors - Status */
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --info-color: #3b82f6;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(0, 102, 255, 0.5);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  background: var(--darker-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

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

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

/* --- Container System --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* --- Grid System --- */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-lg);
  background: rgba(10, 14, 39, 0.98);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-logo img {
  height: 40px;
  width: auto;
}

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

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: width var(--transition-base);
}

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

.nav-link:hover::after {
  width: 100%;
}

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

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--darker-bg);
    flex-direction: column;
    padding: var(--spacing-lg);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

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

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

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

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* --- Cards --- */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-2xl);
  border-color: rgba(0, 102, 255, 0.3);
}

.card-header {
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.card-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.card-body {
  color: var(--text-secondary);
}

.card-footer {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* --- Forms --- */
.form-group {
  margin-bottom: var(--spacing-md);
}

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

.form-label .required {
  color: var(--error-color);
  margin-left: 4px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: all var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1);
}

.form-input::placeholder {
  color: var(--text-muted);
}

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

.form-error {
  color: var(--error-color);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  display: none;
}

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

.form-group.error .form-error {
  display: block;
}

.form-group.success .form-input,
.form-group.success .form-select {
  border-color: var(--success-color);
}

/* --- Checkbox & Radio --- */
.form-checkbox,
.form-radio {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.form-checkbox input,
.form-radio input {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

/* --- Loading Spinner --- */
.spinner {
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Utilities --- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.slide-in-right {
  animation: slideInRight 0.6s ease-out;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  :root {
    font-size: 15px;
  }
}

@media (max-width: 768px) {
  :root {
    font-size: 14px;
  }
  
  .container,
  .container-wide,
  .container-narrow {
    padding: 0 var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
}

/* ============================================================================
   HEADER & NAVIGATION
   ============================================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
}

.header.scrolled {
  background: rgba(10, 14, 39, 0.98);
  box-shadow: var(--shadow-lg);
}

.navbar {
  padding: 1rem 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  transition: opacity 0.3s;
}

.logo:hover {
  opacity: 0.8;
}

.logo-img {
  height: 40px;
  width: auto;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transition: transform 0.3s;
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

/* Navigation Actions */
.nav-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile Menu */
@media (max-width: 1024px) {
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 14, 39, 0.98);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md);
    gap: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all 0.3s;
  }
  
  .nav-menu.active {
    max-height: 500px;
    opacity: 1;
  }
  
  .nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  
  .nav-link {
    padding: 1rem;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-actions {
    order: -1;
  }
}

@media (max-width: 768px) {
  .logo-text {
    display: none;
  }
  
  .nav-actions {
    gap: 0.5rem;
  }
  
  .btn-sm {
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
  }
}

/* ============================================================================
   FOOTER
   ============================================================================ */
.footer {
  background: var(--darker-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

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

.footer-logo {
  height: 50px;
  width: auto;
  margin-bottom: var(--spacing-sm);
}

.footer-desc {
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 0.875rem;
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  transition: all 0.3s;
}

.footer-social a:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.3s;
}

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

.footer-contact {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-contact li {
  display: flex;
  gap: var(--spacing-sm);
  align-items: flex-start;
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-contact svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--primary-color);
}

.footer-contact a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-legal {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-legal a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
}

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

.footer-domain {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-domain svg {
  color: var(--primary-color);
}

.footer-policies {
  display: flex;
  gap: var(--spacing-md);
}

.footer-policies a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.3s;
}

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

/* Footer Responsive */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
  }
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-policies {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* ============================================================================
   END OF MAIN.CSS
   ============================================================================ */

/* ============================================================================
   SITE.CSS — Componentes partilhados (header, nav, footer, botões, utilitários)
   Carregado em todas as páginas públicas: index, login, register, contratos, artigos
   ============================================================================ */

/* ─── Header fixo ────────────────────────────────────────────────────────────── */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 0.75rem 0;
}

.brand-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo {
  width: 36px;
  height: 36px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-size: 1rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.brand-tagline {
  font-size: 0.7rem;
  color: #a0aec0;
  white-space: nowrap;
}

/* ─── Nav ────────────────────────────────────────────────────────────────────── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ─── Dropdown nav ────────────────────────────────────────────────────────────── */
.dropdown { position: relative; }

/* Invisible bridge between nav item and dropdown panel —
   keeps .dropdown in :hover state while cursor travels down */
.dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: -8px;
  right: -8px;
  height: 10px;
  display: none;
}
.dropdown:hover::after { display: block; }

.dropdown-content {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  background: #131829;
  min-width: 230px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0.625rem;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 102, 255, 0.08);
  padding: 0.375rem;
  z-index: 1100;
  animation: fadeInDrop 0.18s ease;
}

@keyframes fadeInDrop { from { opacity: 0; } to { opacity: 1; } }

.dropdown:hover .dropdown-content { display: block; }

.dropdown-item {
  display: block;
  padding: 0.625rem 1rem;
  color: #8892b0;
  font-size: 0.875rem;
  text-decoration: none;
  border-radius: 0.375rem;
  transition: background 0.15s, color 0.15s, padding-left 0.15s;
}

.dropdown-item:hover {
  background: rgba(0, 102, 255, 0.12);
  color: #fff;
  padding-left: 1.25rem;
}

.nav-link {
  color: #a0aec0;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: color 0.2s;
}

.nav-link:hover { color: #00ccff; }

/* ─── Botões ─────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--transition-base);
  white-space: nowrap;
}

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

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
}

.btn-outline {
  background: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.btn-outline:hover {
  background: rgba(0, 102, 255, 0.1);
}

.btn-lg {
  padding: 0.75rem 2rem;
  font-size: 1rem;
}

.btn-sm {
  padding: 0.35rem 0.9rem;
  font-size: 0.8rem;
}

/* ─── Container ──────────────────────────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ─── Utilitários de texto ───────────────────────────────────────────────────── */
.gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-muted    { color: var(--text-muted); }
.text-center   { text-align: center; }
.text-primary  { color: var(--primary-color); }
.text-success  { color: var(--success-color); }
.text-error    { color: var(--error-color); }

/* ─── Card base ──────────────────────────────────────────────────────────────── */
.card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.07);
  box-shadow: var(--shadow-md);
}

/* ─── Footer ─────────────────────────────────────────────────────────────────── */
footer {
  background: var(--darker-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 3rem 0 1.5rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.75rem;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col ul a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-col ul a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-policies {
  display: flex;
  gap: 1.5rem;
}

.footer-policies a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-policies a:hover {
  color: var(--text-secondary);
}

/* ─── Page wrapper (para footer sticky) ─────────────────────────────────────── */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
  padding-top: 70px; /* header height */
}

/* ─── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .nav-menu {
    display: none;
  }

  .container {
    padding: 0 1rem;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}

/* ============================================================
   Mobile/tablet nav — ajustes para o menu hambúrguer (publicação)
   ============================================================ */
@media (max-width: 1024px) {
  /* O hambúrguer tem de aparecer sempre que o menu horizontal desaparece */
  .menu-toggle { display: flex; }

  /* Dropdown "Home" expandido dentro do menu mobile (touch não tem hover) */
  .nav-menu .dropdown-content {
    display: block;
    position: static;
    min-width: 0;
    border: none;
    background: transparent;
    box-shadow: none;
    padding: 0 0 0 1rem;
    animation: none;
  }
  .nav-menu { z-index: 1000; }
  .nav-menu li { width: 100%; }
  .nav-menu .nav-link { display: block; padding: 0.6rem 0.5rem; }
  .nav-menu.active {
    max-height: calc(100vh - 80px);
    overflow-y: auto;
  }
}

@media (max-width: 768px) {
  /* Anula o display:none legado (regra "Responsive" acima) quando aberto */
  .nav-menu.active {
    display: flex;
    flex-direction: column;
  }
}