/* Acerta IA - Dark Futuristic Theme */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  background: linear-gradient(135deg, #0a0a1a 0%, #1a0a2e 50%, #0a0a1a 100%);
  color: #e2e8f0;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated background */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(6, 182, 212, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(236, 72, 153, 0.05) 0%, transparent 50%);
  z-index: -2;
  animation: gradient-shift 15s ease infinite;
}

/* Grid pattern overlay */
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(rgba(124, 58, 237, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 58, 237, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: -1;
  pointer-events: none;
}

@keyframes gradient-shift {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Selection */
::selection {
  background: rgba(124, 58, 237, 0.4);
  color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #0a0a1a; }
::-webkit-scrollbar-thumb { background: rgba(124, 58, 237, 0.4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(124, 58, 237, 0.6); }

/* Gradient text */
.gradient-text {
  background: linear-gradient(135deg, #7c3aed, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Glass card */
.glass-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(124, 58, 237, 0.3);
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 20px 60px -15px rgba(124, 58, 237, 0.2), 0 0 30px -10px rgba(6, 182, 212, 0.1);
}

/* Tool card specific */
.tool-card {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 1.5rem;
  display: block;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, #7c3aed, #06b6d4, #ec4899);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.tool-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(124, 58, 237, 0.3);
  transform: translateY(-6px);
  box-shadow: 0 25px 60px -15px rgba(124, 58, 237, 0.25), 0 0 40px -10px rgba(6, 182, 212, 0.15);
}

.tool-card:hover::before { opacity: 1; }

.tool-card .tool-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  display: block;
  transition: transform 0.3s ease;
}

.tool-card:hover .tool-icon { transform: scale(1.15); }

/* Category badges */
.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  letter-spacing: 0.03em;
}
.badge-saude { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-seguranca { background: rgba(239, 68, 68, 0.15); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.2); }
.badge-documentos { background: rgba(245, 158, 11, 0.15); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.2); }
.badge-utilidade { background: rgba(124, 58, 237, 0.15); color: #a78bfa; border: 1px solid rgba(124, 58, 237, 0.2); }
.badge-texto { background: rgba(6, 182, 212, 0.15); color: #22d3ee; border: 1px solid rgba(6, 182, 212, 0.2); }
.badge-financas { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-matematica { background: rgba(236, 72, 153, 0.15); color: #f472b6; border: 1px solid rgba(236, 72, 153, 0.2); }
.badge-trabalho { background: rgba(59, 130, 246, 0.15); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.2); }

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, #7c3aed, #06b6d4);
  color: white;
  font-weight: 600;
  padding: 0.75rem 2rem;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
  font-family: inherit;
  font-size: 1rem;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(124, 58, 237, 0.5), 0 0 20px rgba(6, 182, 212, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: #e2e8f0;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: inherit;
  font-size: 0.875rem;
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(124, 58, 237, 0.3);
}

/* Inputs */
.input-dark {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  color: #e2e8f0;
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.3s ease;
}
.input-dark:focus {
  outline: none;
  border-color: #7c3aed;
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.2);
  background: rgba(255, 255, 255, 0.06);
}
.input-dark::placeholder { color: #4a5568; }

textarea.input-dark, select.input-dark { resize: vertical; }

/* Labels */
.label-dark {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: #94a3b8;
  margin-bottom: 0.5rem;
}

/* Result table */
.result-table { width: 100%; border-collapse: collapse; }
.result-table th {
  background: rgba(124, 58, 237, 0.1);
  font-weight: 600;
  color: #a78bfa;
  text-align: left;
  padding: 0.75rem 0.75rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.result-table td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: #cbd5e1;
  font-size: 0.875rem;
}
.result-table tr:hover { background: rgba(255, 255, 255, 0.03); }

/* Strength bar */
.strength-bar {
  transition: width 0.4s ease, background-color 0.4s ease;
}

/* Ad placeholder */
.ad-placeholder {
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.15);
  font-size: 0.75rem;
  min-height: 90px;
}

/* Copy button */
.copy-btn {
  cursor: pointer;
  transition: all 0.2s ease;
}
.copy-btn:active { transform: scale(0.95); }

/* Fade in */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.4s ease-out; }

/* Float animation */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* Glow pulse */
@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(124, 58, 237, 0.3); }
  50% { box-shadow: 0 0 40px rgba(124, 58, 237, 0.5), 0 0 60px rgba(6, 182, 212, 0.2); }
}

/* SEO text styling */
.seo-text h2 { color: #e2e8f0; font-size: 1.5rem; font-weight: 700; margin-bottom: 1rem; margin-top: 1.5rem; }
.seo-text h3 { color: #cbd5e1; font-size: 1.25rem; font-weight: 600; margin-bottom: 0.75rem; margin-top: 1.25rem; }
.seo-text p { color: #94a3b8; margin-bottom: 1rem; line-height: 1.7; }
.seo-text ul { color: #94a3b8; padding-left: 1.5rem; margin-bottom: 1rem; }
.seo-text li { margin-bottom: 0.5rem; line-height: 1.6; }
.seo-text strong { color: #cbd5e1; }

/* Stat card dark */
.stat-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 1rem;
  text-align: center;
  transition: all 0.3s ease;
}
.stat-card:hover {
  border-color: rgba(124, 58, 237, 0.2);
  background: rgba(255, 255, 255, 0.06);
}

/* Floating orbs */
.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: -1;
}

/* Mobile menu */
.mobile-menu-link {
  display: block;
  padding: 0.6rem 1rem;
  border-radius: 10px;
  color: #94a3b8;
  text-decoration: none;
  transition: all 0.2s ease;
  font-size: 0.9rem;
}
.mobile-menu-link:hover, .mobile-menu-link.active {
  background: rgba(124, 58, 237, 0.1);
  color: #e2e8f0;
}

/* Range input dark */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, #7c3aed, #06b6d4);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(124, 58, 237, 0.5);
}

/* Checkbox dark */
input[type="checkbox"] {
  accent-color: #7c3aed;
  width: 18px;
  height: 18px;
}