* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --bg-main: #0B0F19;
  --bg-card: #151D2F;
  --bg-input: #1C263D;
  --border-color: #263554;
  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --accent-blue: #38BDF8;
  --accent-indigo: #6366F1;
  --accent-gold: #F59E0B;
  --accent-green: #10B981;
  --accent-red: #EF4444;
  --user-bubble: #1E3A8A;
  --ai-bubble: #1E293B;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  user-select: text;
}

.app-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

/* Header */
.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: rgba(21, 29, 47, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 10;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-red);
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.6);
  transition: all 0.3s;
}

.status-indicator.online {
  background: var(--accent-green);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.8);
}

.header-titles {
  display: flex;
  flex-direction: column;
}

.app-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.3px;
}

.host-badge {
  font-size: 11px;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.profile-select {
  background: var(--bg-input);
  color: var(--accent-blue);
  border: 1px solid var(--border-color);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  outline: none;
  cursor: pointer;
}

.icon-btn {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 9px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.icon-btn:hover {
  background: var(--border-color);
}

/* Chat Main */
.chat-main {
  flex: 1;
  overflow-y: auto;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  scroll-behavior: smooth;
}

.welcome-card {
  background: linear-gradient(145deg, rgba(30, 41, 59, 0.6) 0%, rgba(15, 23, 42, 0.8) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 10px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.welcome-icon {
  font-size: 32px;
  margin-bottom: 8px;
}

.welcome-card h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--accent-gold);
}

.welcome-card p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.welcome-card strong {
  color: var(--accent-blue);
}

.quick-prompts {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.prompt-chip {
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
  color: var(--accent-blue);
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
}

.prompt-chip:active {
  background: rgba(56, 189, 248, 0.2);
  transform: scale(0.98);
}

/* Messages */
.message-row {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.message-row.user {
  align-items: flex-end;
}

.message-row.ai {
  align-items: flex-start;
}

.message-meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
  display: flex;
  gap: 6px;
  align-items: center;
}

.message-bubble {
  max-width: 90%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14.5px;
  line-height: 1.6;
  word-break: break-word;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.message-row.user .message-bubble {
  background: var(--user-bubble);
  color: #FFFFFF;
  border-bottom-right-radius: 4px;
}

.message-row.ai .message-bubble {
  background: var(--ai-bubble);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: 4px;
}

.message-bubble pre {
  background: #090D16;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin: 10px 0;
  overflow-x: auto;
  font-family: 'Consolas', monospace;
  font-size: 12.5px;
  color: #38BDF8;
}

.message-bubble code {
  font-family: 'Consolas', monospace;
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 12.5px;
}

.copy-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-muted);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  float: right;
  margin-top: -6px;
  margin-right: -6px;
}

/* Typing / Pending indicator */
.typing-indicator {
  display: flex;
  gap: 5px;
  padding: 10px 14px;
  align-items: center;
}

.dot {
  width: 7px;
  height: 7px;
  background: var(--accent-blue);
  border-radius: 50%;
  animation: pulse 1.4s infinite ease-in-out both;
}

.dot:nth-child(1) { animation-delay: -0.32s; }
.dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes pulse {
  0%, 80%, 100% { transform: scale(0); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

/* Input Bar */
.input-container {
  padding: 10px 14px;
  background: rgba(21, 29, 47, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-color);
  z-index: 10;
}

.input-wrapper {
  display: flex;
  align-items: flex-end;
  background: var(--bg-input);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 6px 10px;
  gap: 8px;
  transition: border-color 0.2s;
}

.input-wrapper:focus-within {
  border-color: var(--accent-blue);
}

.input-wrapper textarea {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 14.5px;
  line-height: 1.4;
  resize: none;
  max-height: 120px;
  min-height: 24px;
  padding: 4px 4px;
}

.input-wrapper textarea::placeholder {
  color: var(--text-muted);
}

.send-btn {
  background: var(--accent-blue);
  color: #000;
  border: none;
  border-radius: 50%;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 0.15s, background 0.15s;
}

.send-btn:active {
  transform: scale(0.92);
  background: #0284C7;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
  backdrop-filter: blur(4px);
}

.modal-overlay.hidden {
  display: none;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 440px;
  box-shadow: 0 16px 36px rgba(0,0,0,0.5);
  overflow: hidden;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 22px;
  cursor: pointer;
}

.modal-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.setting-label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
}

.text-input {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  color: var(--text-main);
  font-size: 14px;
  outline: none;
}

.text-input:focus {
  border-color: var(--accent-blue);
}

.quick-hosts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip-sm {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 11.5px;
  padding: 5px 9px;
  border-radius: 6px;
  cursor: pointer;
}

.chip-sm:active {
  background: rgba(255, 255, 255, 0.15);
}

.test-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}

.action-btn {
  background: var(--border-color);
  color: var(--text-main);
  border: none;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
}

.test-result {
  font-size: 12.5px;
  font-weight: 600;
}

.test-result.success {
  color: var(--accent-green);
}

.test-result.error {
  color: var(--accent-red);
}

.modal-footer {
  padding: 12px 18px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
}

.save-btn {
  background: var(--accent-blue);
  color: #000;
  border: none;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}