:root {
  --primary: #00f0ff;
  --primary-dark: #00b8c4;
  --secondary: #a855f7;
  --bg: #030712;
  --card: rgba(15, 23, 42, 0.65);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --success: #22c55e;
  --glow-primary: 0 0 20px rgba(0, 240, 255, 0.3);
  --glow-secondary: 0 0 30px rgba(168, 85, 247, 0.25);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Plus Jakarta Sans', -apple-system, sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

/* =========================
   🌌 BACKGROUND ANIMADO
========================= */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(168, 85, 247, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(0, 240, 255, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(15, 23, 42, 1) 0%, var(--bg) 100%);
  z-index: -2;
  pointer-events: none;
}

/* =========================
   📱 CONTAINER
========================= */
.app-container {
  max-width: 520px;
  margin: auto;
  padding: 24px;
  position: relative;
}

/* =========================
   ✨ HEADER
========================= */
header {
  text-align: center;
  margin-bottom: 32px;
  padding-top: 20px;
}

.logo {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
  filter: drop-shadow(0 0 12px rgba(0, 240, 255, 0.4));
}

.logo span {
  -webkit-text-fill-color: var(--text);
  background: none;
  font-weight: 600;
  opacity: 0.9;
}

.tagline {
  color: var(--text-muted);
  font-size: 15px;
  margin-top: 8px;
  font-weight: 500;
  letter-spacing: 0.3px;
}

/* =========================
   🃏 CARD PRINCIPAL
========================= */
.main-card {
  background: var(--card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  padding: 32px;
  border-radius: 24px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), var(--glow-primary);
  position: relative;
  overflow: hidden;
}

.main-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0.6;
}

.main-card label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--primary);
  margin-bottom: 10px;
}

/* =========================
   📝 INPUT
========================= */
input[type="url"], input[type="text"] {
  width: 100%;
  padding: 16px 18px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(2, 6, 23, 0.6);
  color: #fff;
  font-size: 15px;
  outline: none;
  transition: all 0.3s ease;
}

input[type="url"]::placeholder {
  color: #475569;
}

input[type="url"]:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1);
}

/* =========================
   🔘 BOTÃO PRINCIPAL
========================= */
.glow-button {
  width: 100%;
  padding: 18px;
  margin-top: 20px;
  border-radius: 16px;
  border: none;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #030712;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.5px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.3s;
  box-shadow: 0 4px 20px rgba(0, 240, 255, 0.25);
}

.glow-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 240, 255, 0.4);
}

.glow-button:active {
  transform: translateY(0);
}

.glow-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* =========================
   🎯 RESULTADO
========================= */
#result-area {
  margin-top: 24px;
}

.result-box {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.result-box input {
  flex: 1;
  font-family: 'Courier New', monospace;
  font-size: 14px;
  letter-spacing: -0.3px;
}

#copyBtn {
  background: linear-gradient(135deg, var(--success) 0%, #16a34a 100%);
  border: none;
  padding: 0 22px;
  border-radius: 14px;
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.25);
}

#copyBtn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.35);
}

/* =========================
   📊 STATS
========================= */
.stats {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  padding: 10px 16px;
  border-radius: 12px;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

#clicks {
  color: var(--primary);
  font-weight: 700;
}

/* =========================
   🎴 FEATURES
========================= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.f-item {
  background: var(--card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  padding: 18px 12px;
  border-radius: 16px;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  transition: transform 0.2s, border-color 0.3s;
}

.f-item:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 240, 255, 0.2);
}

.f-item span {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

/* =========================
   📝 ABOUT / SEO
========================= */
.about {
  margin-top: 36px;
  text-align: center;
  padding: 24px;
  background: var(--card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: 20px;
}

.about h3 {
  color: var(--primary);
  font-size: 18px;
  margin-bottom: 14px;
  font-weight: 700;
}

.about p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
  margin: 10px 0;
}

.about strong {
  color: var(--text);
}

/* =========================
   ❓ FAQ
========================= */
.faq-section {
  margin-top: 36px;
}

.faq-section h3 {
  text-align: center;
  color: var(--primary);
  font-size: 18px;
  margin-bottom: 20px;
  font-weight: 700;
}

.faq-item {
  background: var(--card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.3s;
}

.faq-item:hover {
  border-color: rgba(0, 240, 255, 0.15);
}

.faq-item summary {
  padding: 18px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  color: var(--text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::after {
  content: "›";
  font-size: 22px;
  color: var(--primary);
  transition: transform 0.3s;
  display: inline-block;
}

.faq-item[open] summary::after {
  transform: rotate(90deg);
}

.faq-item p {
  padding: 0 20px 18px;
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* =========================
   🔗 NAV SEO
========================= */
.nav-seo {
  margin-top: 32px;
  text-align: center;
  font-size: 13px;
  line-height: 2.2;
}

.nav-seo a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
  display: inline-block;
  padding: 4px 10px;
  border-radius: 8px;
}

.nav-seo a:hover {
  color: var(--primary);
  background: rgba(0, 240, 255, 0.05);
}

/* =========================
   📋 FOOTER
========================= */
.footer-fixed {
  margin-top: 40px;
  padding: 24px 0 40px;
  text-align: center;
  font-size: 12px;
  color: #475569;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.footer-links {
  margin-top: 10px;
}

.footer-links a {
  color: var(--text-muted);
  margin: 0 12px;
  font-size: 12px;
  text-decoration: none;
  transition: color 0.2s;
}

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

/* =========================
   🎭 ANIMAÇÕES
========================= */
.animate-pop {
  animation: pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes pop {
  from { transform: scale(0.85); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.hidden { display: none !important; }

/* =========================
   📱 RESPONSIVE
========================= */
@media (max-width: 480px) {
  .app-container { padding: 16px; }
  .main-card { padding: 24px; }
  .logo { font-size: 30px; }
  .features-grid { gap: 8px; }
  .f-item { padding: 14px 8px; font-size: 12px; }
}