:root {
  --primary: #00ffff;
  --primary-dark: #00cccc;
  --secondary: #003333;
  --accent: #00cccc;
  --background: #000000;
  --surface: #111111;
  --surface-2: #1a1a1a;
  --text: #00ffff;
  --text-secondary: rgba(0, 255, 255, 0.8);
  --text-muted: rgba(0, 255, 255, 0.6);
  --border: rgba(0, 255, 255, 0.2);
  --border-hover: rgba(0, 204, 204, 0.4);
  --error: #ff4444;
  --success: #44ff44;
  --warning: #ffaa00;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --shadow-sm: 0 1px 2px rgba(0, 255, 255, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 255, 255, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 255, 255, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background-color: var(--background);
  color: var(--text);
  font-family: "Inter", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  width: 100%;
}

/* Navigation */
.navbar {
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

.nav-brand:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: var(--spacing-xl);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--spacing-2xl) 0;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Features */
.features {
  padding: var(--spacing-2xl) 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all 0.3s ease;
}

.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.feature-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: var(--spacing-md);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  font-size: 1rem;
  min-height: 44px; /* Touch-friendly */
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

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

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

/* Chat Layout */
.chat-layout {
  flex-direction: row;
  height: calc(100vh - 4rem);
}

.sidebar {
  width: 300px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Chat Components */
.chat-container {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.chat-header {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.chat-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 var(--spacing-xs) 0;
}

.chat-status {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.messages-container {
  flex: 1;
  padding: var(--spacing-md);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.message {
  display: flex;
  flex-direction: column;
  max-width: 80%;
}

.message.user {
  align-self: flex-end;
}

.message.user .message-content {
  background: var(--primary);
  color: var(--background);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-sm) var(--radius-lg);
}

.message.assistant {
  align-self: flex-start;
}

.message.assistant .message-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) var(--radius-sm);
}

.message-content {
  padding: var(--spacing-sm) var(--spacing-md);
  word-wrap: break-word;
}

.message-timestamp {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
  align-self: flex-end;
}

.message.assistant .message-timestamp {
  align-self: flex-start;
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 4px;
  padding: var(--spacing-sm);
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: typing 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) {
  animation-delay: -0.32s;
}

.typing-indicator span:nth-child(2) {
  animation-delay: -0.16s;
}

@keyframes typing {
  0%, 80%, 100% {
    opacity: 0.3;
  }
  40% {
    opacity: 1;
  }
}
/* Chat Input */
.chat-input-form {
  padding: var(--spacing-md);
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.input-container {
  display: flex;
  gap: var(--spacing-sm);
  max-width: 800px;
  margin: 0 auto;
}

.chat-input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 1rem;
  min-height: 44px;
}

.chat-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(0, 255, 255, 0.2);
}

.send-button {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--primary);
  color: var(--background);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  min-height: 44px;
}

.send-button:hover:not(:disabled) {
  background: var(--primary-dark);
}

.send-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Conversation List */
.conversation-list {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.conversation-list-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.conversation-list-header h3 {
  margin: 0;
  font-size: 1.125rem;
  color: var(--text);
}

.new-conversation-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--primary);
  color: var(--background);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.conversations {
  flex: 1;
  overflow-y: auto;
}

.conversation-item {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
  transition: background-color 0.3s ease;
}

.conversation-item:hover {
  background: var(--surface-2);
}

.conversation-link {
  flex: 1;
  padding: var(--spacing-md);
  text-decoration: none;
  color: inherit;
}

.conversation-title {
  font-weight: 500;
  color: var(--text);
  margin-bottom: var(--spacing-xs);
  line-height: 1.4;
}

.conversation-date {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.delete-conversation {
  padding: var(--spacing-sm);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.25rem;
  transition: color 0.3s ease;
}

.delete-conversation:hover {
  color: var(--error);
}

/* Error Banner */
.error-banner {
  background: var(--error);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: var(--spacing-md);
  border-radius: var(--radius-md);
}

.close-error {
  background: none;
  border: none;
  color: white;
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0;
  margin-left: var(--spacing-sm);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .chat-layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    height: 40vh;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .nav-links {
    gap: var(--spacing-md);
  }
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  .btn {
    width: 100%;
    max-width: 300px;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .message {
    max-width: 90%;
  }
  .container {
    padding: 0 var(--spacing-sm);
  }
}
@media (max-width: 480px) {
  .nav-container {
    padding: 0 var(--spacing-sm);
  }
  .nav-links {
    gap: var(--spacing-sm);
  }
  .hero {
    padding: var(--spacing-lg) 0;
  }
  .hero-title {
    font-size: 2rem;
  }
  .hero-description {
    font-size: 1rem;
  }
}
/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
/* Focus indicators for keyboard navigation */
.btn:focus,
.nav-link:focus,
.chat-input:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border: rgba(0, 255, 255, 0.5);
    --border-hover: rgba(0, 255, 255, 0.8);
  }
}
.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: var(--spacing-lg);
  letter-spacing: 0.02em;
}

.access-notice {
  margin-top: var(--spacing-xl);
  text-align: center;
}

.access-text {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: var(--spacing-md);
  font-weight: 500;
}

.philosophy {
  padding: var(--spacing-2xl) 0;
  background: linear-gradient(180deg, rgba(0, 255, 255, 0.02) 0%, rgba(0, 51, 51, 0.1) 50%, rgba(0, 255, 255, 0.02) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.philosophy-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.philosophy-text {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  line-height: 1.7;
  color: var(--text-secondary);
  font-style: italic;
  margin-top: var(--spacing-lg);
}

.section-title {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 300;
  margin-bottom: var(--spacing-lg);
  color: var(--text);
  letter-spacing: -0.02em;
}

.exclusivity {
  padding: var(--spacing-2xl) 0;
  background: var(--surface-2);
}

.exclusivity-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.exclusivity-text {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.waitlist {
  margin-top: var(--spacing-xl);
}

.waitlist-text {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: var(--spacing-md);
  font-weight: 500;
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--primary));
  color: var(--background);
  border: none;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 255, 255, 0.3);
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.feature-card {
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.05) 0%, rgba(0, 51, 51, 0.1) 100%);
  border: 1px solid rgba(0, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  transition: all 0.4s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent);
  box-shadow: 0 15px 40px rgba(0, 255, 255, 0.2);
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.1) 0%, rgba(0, 51, 51, 0.15) 100%);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
  filter: brightness(1.2);
}

.nav-brand {
  font-weight: 200;
  letter-spacing: 0.02em;
  font-size: 1.1rem;
}

.nav-link {
  font-weight: 400;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
}
.nav-link:hover {
  color: var(--accent);
  text-shadow: 0 0 8px rgba(0, 255, 255, 0.5);
}

@media (max-width: 768px) {
  .philosophy {
    padding: var(--spacing-2xl) 0;
  }
  .exclusivity {
    padding: var(--spacing-2xl) 0;
  }
  .hero-subtitle {
    margin-bottom: var(--spacing-md);
  }
  .access-notice {
    margin-top: var(--spacing-lg);
  }
}
.ai-status {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  color: var(--text-muted);
}
.ai-status.ready {
  color: var(--success);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--error);
  animation: pulse 2s infinite;
}
.ai-status.ready .status-indicator {
  background: var(--success);
  animation: none;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}
.welcome-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  text-align: center;
  color: var(--text-secondary);
}

.welcome-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.8;
}

.welcome-title {
  font-size: 1.5rem;
  font-weight: 300;
  margin-bottom: var(--spacing-md);
  color: var(--text);
}

.welcome-text {
  font-size: 1rem;
  line-height: 1.6;
  max-width: 400px;
  margin-bottom: var(--spacing-lg);
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--surface-2);
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
.error-banner {
  background: linear-gradient(135deg, rgba(255, 68, 68, 0.1) 0%, rgba(255, 68, 68, 0.05) 100%);
  border: 1px solid rgba(255, 68, 68, 0.3);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.error-text {
  color: var(--error);
  font-size: 0.875rem;
}

.error-close {
  background: none;
  border: none;
  color: var(--error);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background-color 0.2s ease;
}
.error-close:hover {
  background: rgba(255, 68, 68, 0.1);
}

.chat-input {
  resize: vertical;
  min-height: 60px;
  max-height: 150px;
  padding: var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.5;
  width: 100%;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.chat-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0, 255, 255, 0.1);
}
.chat-input.disabled, .chat-input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--surface-2);
}
.chat-input::placeholder {
  color: var(--text-muted);
}

.typing-indicator {
  display: flex;
  gap: 4px;
}
.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: typing 1.4s infinite ease-in-out;
}
.typing-indicator span:nth-child(1) {
  animation-delay: -0.32s;
}
.typing-indicator span:nth-child(2) {
  animation-delay: -0.16s;
}

@keyframes typing {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}
.message-assistant.loading .message-content {
  padding: var(--spacing-md);
  background: var(--surface);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-sm);
}

.empty-conversations {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  color: var(--text-muted);
}
.empty-conversations p {
  margin: 0 0 var(--spacing-sm) 0;
  font-size: 0.875rem;
}
.empty-conversations .empty-subtitle {
  font-size: 0.75rem;
  opacity: 0.7;
}

.conversation-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border);
}
.conversation-header h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
}

.new-conversation-btn {
  background: linear-gradient(135deg, var(--accent), var(--primary));
  color: var(--background);
  border: none;
  border-radius: var(--radius-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}
.new-conversation-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 255, 255, 0.3);
}

.conversation-item {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background-color 0.2s ease;
}
.conversation-item:hover {
  background: var(--surface);
}

.conversation-title {
  font-size: 0.875rem;
  color: var(--text);
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.conversation-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}