/* TWAI Web Styles */

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

:root {
  --primary: #10a37f;
  --secondary: #0d7f5f;
  --dark: #1a1a27;
  --darker: #0d0d12;
  --gray-light: #ececf1;
  --gray: #888888;
  --border: #2a2a3e;
  --error: #d32f2f;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
  background: linear-gradient(135deg, var(--dark) 0%, var(--darker) 100%);
  color: var(--gray-light);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  background: rgba(26, 26, 39, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-links a {
  color: var(--gray-light);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

.user-info {
  color: var(--gray-light);
  font-size: 14px;
}

.user-info a {
  color: var(--primary);
  margin-left: 8px;
}

/* Main Content */
.main-content {
  padding: 80px 0;
}

.hero {
  text-align: center;
  margin-bottom: 80px;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--primary), #00d9a3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 18px;
  color: var(--gray);
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 16px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(16, 163, 127, 0.3);
}

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

.btn-secondary:hover {
  background: rgba(16, 163, 127, 0.1);
}

/* Features */
.features {
  margin-bottom: 80px;
}

.features h2 {
  text-align: center;
  font-size: 32px;
  margin-bottom: 48px;
  color: var(--gray-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.feature {
  background: rgba(42, 42, 62, 0.5);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  transition: all 0.3s;
}

.feature:hover {
  border-color: var(--primary);
  background: rgba(16, 163, 127, 0.05);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 40px;
  display: block;
  margin-bottom: 16px;
}

.feature h3 {
  color: var(--gray-light);
  margin-bottom: 8px;
}

.feature p {
  color: var(--gray);
  font-size: 14px;
}

/* Modals */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal.show {
  display: flex !important;
}

.modal-content {
  background: var(--dark);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  max-width: 500px;
  width: 90%;
  position: relative;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  animation: slideUp 0.3s ease-out;
}

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

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--gray-light);
  font-size: 24px;
  cursor: pointer;
  transition: color 0.2s;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  color: var(--primary);
}

.modal-content h2 {
  color: var(--primary);
  margin-bottom: 8px;
  font-size: 20px;
}

.modal-content p {
  color: var(--gray);
  margin-bottom: 20px;
  font-size: 14px;
}

.form-group {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
}

.form-group label {
  color: var(--gray-light);
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 14px;
}

.form-group input,
.form-group select {
  background: #16213e;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--gray-light);
  padding: 10px 12px;
  font-size: 14px;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(16, 163, 127, 0.1);
}

.form-group input::placeholder {
  color: var(--gray);
}

.error-message {
  background: rgba(211, 47, 47, 0.1);
  border: 1px solid var(--error);
  border-radius: 6px;
  color: #ff6b6b;
  padding: 12px;
  margin-bottom: 16px;
  font-size: 13px;
  display: none;
}

.error-message:not(:empty) {
  display: block;
}

.auth-toggle {
  text-align: center;
  margin-top: 16px;
  font-size: 14px;
}

.auth-toggle p {
  color: var(--gray);
}

.auth-toggle a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
}

.auth-toggle a:hover {
  text-decoration: underline;
}

/* Session Info */
.session-info {
  background: #16213e;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
}

.session-info .label {
  color: var(--gray);
  font-size: 12px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.code-display {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
  margin-bottom: 12px;
}

.code {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  font-family: 'Courier New', monospace;
  letter-spacing: 2px;
}

.btn-copy {
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 4px;
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
}

.btn-copy:hover {
  background: var(--secondary);
}

.session-info .hint {
  color: var(--gray);
  font-size: 12px;
  text-align: center;
}

.modal-hint {
  text-align: center;
  margin-top: 12px;
  font-size: 13px;
  color: var(--gray);
}

.modal-hint a {
  color: var(--primary);
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
}

/* Footer */
.footer {
  background: rgba(26, 26, 39, 0.5);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 80px;
  text-align: center;
  color: var(--gray);
  font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 32px;
  }

  .hero p {
    font-size: 16px;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .modal-content {
    max-width: 95%;
  }
}