@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --primary: #8b5cf6;
  --primary-dark: #7c3aed;
  --secondary: #06b6d4;
  --accent: #f472b6;
  --background: #0a0a1a;
  --surface: rgba(30, 41, 59, 0.6);
  --surface-light: #334155;
  --text: #f8fafc;
  --text-muted: #94a3b8;
  --error: #ef4444;
  --warning: #f59e0b;
  --success: #22c55e;
  --border-radius: 20px;
  --glow: 0 0 60px rgba(139, 92, 246, 0.3);
}

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

body {
  font-family: 'Inter', sans-serif;
  color: var(--text);
  min-height: 100vh;
  background: var(--background);
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 92, 246, 0.3) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(6, 182, 212, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 0% 80%, rgba(244, 114, 182, 0.15) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(139, 92, 246, 0.6);
  border-radius: 50%;
  animation: float 15s infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100vh) rotate(720deg); opacity: 0; }
}

.container {
  max-width: 700px;
  margin: 0 auto;
  padding: 30px 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  text-align: center;
  padding: 50px 0 40px;
}

.logo {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -1px;
  background: linear-gradient(135deg, #fff 0%, var(--primary) 50%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
  text-shadow: 0 0 60px rgba(139, 92, 246, 0.5);
  animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
  from { filter: drop-shadow(0 0 20px rgba(139, 92, 246, 0.3)); }
  to { filter: drop-shadow(0 0 40px rgba(139, 92, 246, 0.6)); }
}

.lang-selector {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 25px;
}

.lang-btn {
  width: 44px;
  height: 32px;
  border: 2px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1rem;
  background: rgba(30, 41, 59, 0.5);
  backdrop-filter: blur(10px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lang-btn:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.3);
}

.lang-btn.active {
  border-color: var(--primary);
  background: rgba(139, 92, 246, 0.2);
}

.welcome {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff 0%, #e2e8f0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.cards {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 40px;
  flex: 1;
}

.card {
  position: relative;
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(30, 41, 59, 0.4) 100%);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  padding: 30px;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  gap: 24px;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.05) 100%);
  opacity: 0;
  transition: opacity 0.4s;
}

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

.card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: rgba(139, 92, 246, 0.5);
  box-shadow: 
    0 25px 50px rgba(0, 0, 0, 0.4),
    0 0 100px rgba(139, 92, 246, 0.2),
    inset 0 1px 0 rgba(255,255,255,0.1);
}

.card-icon {
  width: 70px;
  height: 70px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.card-icon.duolingo {
  background: linear-gradient(135deg, #58cc02 0%, #89e219 100%);
  box-shadow: 0 10px 40px rgba(88, 204, 2, 0.4);
}

.card-icon.roblox {
  background: linear-gradient(135deg, #ff6b6b 0%, #ee5a5a 100%);
  box-shadow: 0 10px 40px rgba(238, 90, 90, 0.4);
}

.card-content { position: relative; z-index: 1; }

.card-content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}

.card-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.form-container {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 30px;
  cursor: pointer;
  transition: all 0.3s;
  font-weight: 500;
}

.back-btn:hover { color: var(--text); transform: translateX(-5px); }

.form-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(30, 41, 59, 0.4) 100%);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  padding: 35px;
  flex: 1;
}

.form-title {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 30px;
}

.form-title h2 { font-size: 1.6rem; font-weight: 700; }

.form-group { margin-bottom: 22px; }

.form-group label {
  display: block;
  margin-bottom: 10px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 16px 18px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  color: var(--text);
  font-size: 1rem;
  transition: all 0.3s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.15), 0 0 30px rgba(139, 92, 246, 0.1);
}

.warning-box {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 22px;
  font-size: 0.9rem;
  color: var(--warning);
  line-height: 1.5;
}

.tutorial-box {
  background: rgba(15, 23, 42, 0.6);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 22px;
}

.tutorial-box p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.tutorial-box a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--secondary);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
}

.tutorial-box a:hover { color: #22d3ee; transform: translateX(5px); }

.submit-btn {
  width: 100%;
  padding: 18px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border: none;
  border-radius: 12px;
  color: white;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.submit-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 40px rgba(139, 92, 246, 0.4);
}

.submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.active { display: flex; }

.modal-content {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.95) 0%, rgba(30, 41, 59, 0.85) 100%);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--border-radius);
  padding: 45px;
  max-width: 450px;
  width: 100%;
  text-align: center;
  animation: modalIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.9) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-icon {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 25px;
  font-size: 2.8rem;
}

.modal-icon.success { background: linear-gradient(135deg, rgba(34, 197, 94, 0.2) 0%, rgba(34, 197, 94, 0.1) 100%); }
.modal-icon.error { background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, rgba(239, 68, 68, 0.1) 100%); }

.modal h3 {
  font-size: 1.6rem;
  margin-bottom: 15px;
  font-weight: 700;
}

.modal p {
  color: var(--text-muted);
  margin-bottom: 25px;
  line-height: 1.5;
}

.link-box {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 25px;
  word-break: break-all;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  color: var(--secondary);
}

.copy-btn {
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--secondary) 0%, #0891b2 100%);
  border: none;
  border-radius: 10px;
  color: white;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s;
}

.copy-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(6, 182, 212, 0.4); }

.close-btn {
  padding: 14px 28px;
  background: rgba(51, 65, 85, 0.8);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  margin-top: 12px;
  transition: all 0.3s;
}

.close-btn:hover { background: rgba(51, 65, 85, 1); }

.hidden { display: none !important; }

@media (max-width: 480px) {
  .header { padding: 30px 0; }
  .logo { font-size: 2rem; }
  .welcome { font-size: 1.5rem; }
  .card { padding: 22px; gap: 18px; }
  .card-icon { width: 55px; height: 55px; font-size: 1.7rem; }
  .card-content h3 { font-size: 1.2rem; }
  .modal-content { padding: 30px 20px; }
}