/* PromptForge Styles */

:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --danger-color: #dc2626;
  --danger-hover: #b91c1c;
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-color: #1e293b;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --user-msg-bg: #dbeafe;
  --assistant-msg-bg: #f1f5f9;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

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

/* Header */
.header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 2rem;
  text-align: center;
}

.header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.header p {
  color: var(--text-muted);
}

.header-compact {
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-compact h1 {
  font-size: 1.25rem;
  margin: 0;
}

.back-link {
  color: var(--primary-color);
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}

/* Main Content */
.main {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: var(--border-color);
  color: var(--text-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #cbd5e1;
}

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

.btn-danger:hover:not(:disabled) {
  background-color: var(--danger-hover);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Session Controls */
.session-controls {
  margin-bottom: 2rem;
}

/* Sessions List */
.sessions-section h2 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.sessions-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.session-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
}

.session-info h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.session-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.status {
  padding: 0.125rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.status-active {
  background: #dcfce7;
  color: #166534;
}

.status-completed {
  background: #dbeafe;
  color: #1e40af;
}

.session-actions {
  display: flex;
  gap: 0.5rem;
}

.session-actions .btn {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Empty & Error States */
.empty-state,
.error-state,
.loading {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

.error-state {
  color: var(--danger-color);
}

/* Chat Page */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  padding: 0;
}

.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 0;
  max-height: calc(100vh - 200px);
}

.message {
  padding: 1rem;
  border-radius: var(--radius);
  max-width: 85%;
}

.message-user {
  background: var(--user-msg-bg);
  align-self: flex-end;
}

.message-assistant {
  background: var(--assistant-msg-bg);
  align-self: flex-start;
}

.message-system {
  background: #fef3c7;
  align-self: center;
  text-align: center;
  font-size: 0.875rem;
}

.message-header {
  margin-bottom: 0.5rem;
}

.message-role {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.message-content {
  white-space: pre-wrap;
  word-wrap: break-word;
}

.message-content code {
  background: rgba(0, 0, 0, 0.1);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-family: monospace;
}

/* Typing Indicator */
.typing-indicator .message-content {
  display: flex;
  gap: 4px;
  padding: 0.5rem 0;
}

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

.typing-indicator .dot:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator .dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  30% {
    transform: translateY(-4px);
    opacity: 1;
  }
}

/* Message Form */
.message-form {
  padding: 1rem;
  background: var(--card-bg);
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 1rem;
  align-items: flex-end;
}

.message-form textarea {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  resize: none;
  line-height: 1.5;
}

.message-form textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Responsive */
@media (max-width: 640px) {
  .header {
    padding: 1.5rem 1rem;
  }

  .main {
    padding: 1rem;
  }

  .session-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .session-actions {
    width: 100%;
  }

  .session-actions .btn {
    flex: 1;
    text-align: center;
  }

  .message {
    max-width: 95%;
  }
}