:root {
  --primary: #4CAF50;
  --primary-dark: #2E7D32;
  --background: #0D1117;
  --surface: #161B22;
  --surface-hover: #21262D;
  --surface-border: #30363D;
  --text: #E6EDF3;
  --text-muted: #8B949E;
  --accent: #7EE787;
  --accent-glow: rgba(126, 231, 135, 0.25);
  --error: #F85149;
  --error-bg: rgba(248, 81, 73, 0.15);
  --warning: #D29922;
  --user-bubble: #1F2937;
  --user-bubble-border: #374151;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

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

html, body {
  width: 100%;
  height: 100%;
  overscroll-behavior-y: none;
  background-color: var(--background);
  color: var(--text);
  font-family: var(--font-sans);
  overflow: hidden;
  position: fixed;
}

#app-container {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  width: 100%;
  overscroll-behavior-y: none;
  max-width: 900px;
  margin: 0 auto;
  background-color: var(--background);
  border-left: 1px solid var(--surface-border);
  border-right: 1px solid var(--surface-border);
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
  position: relative;

}


/* Header Area */
header.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  padding-top: calc(12px + env(safe-area-inset-top));
  background-color: var(--surface);
  border-bottom: 1px solid var(--surface-border);
  z-index: 10;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.kiwi-logo-badge {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 12px var(--accent-glow);
  flex-shrink: 0;
}

.kiwi-logo-badge img {
  width: 32px;
  height: 32px;
}

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

.app-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 6px;
}

.app-title .brand-accent {
  color: var(--accent);
}

.header-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

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

.icon-btn {
  background: var(--surface-border);
  border: 1px solid transparent;
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

/* Avatar & Status Section */
.status-bar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background-color: rgba(22, 27, 34, 0.6);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--surface-border);
}

.avatar-container {
  display: flex;
  align-items: center;
  gap: 10px;
}

.avatar-face {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  padding: 8px 6px;
  border-radius: 20px;
  background-color: var(--surface);
  border: 1.5px solid var(--primary);
  color: var(--accent);
  transition: all 0.25s ease;
  user-select: none;
  display: inline-block;
  min-width: 70px;
  text-align: center;
  box-shadow: 0 0 10px rgba(76, 175, 80, 0.2);
}

.avatar-face.state-idle {
  color: var(--accent);
  border-color: var(--primary);
}

.avatar-face.state-thinking {
  color: #FFD54F;
  border-color: #FFA000;
  animation: pulse-thinking 1.2s infinite ease-in-out;
}

.avatar-face.state-solved {
  color: #69F0AE;
  border-color: #00E676;
  box-shadow: 0 0 16px rgba(105, 240, 174, 0.4);
}

.avatar-face.state-error {
  color: var(--error);
  border-color: var(--error);
  animation: shake 0.4s ease;
}

@keyframes pulse-thinking {
  0% { transform: scale(1); opacity: 0.85; }
  50% { transform: scale(1.05); opacity: 1; box-shadow: 0 0 14px rgba(255, 213, 79, 0.4); }
  100% { transform: scale(1); opacity: 0.85; }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 6px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
  font-family: var(--font-mono);
  background-color: var(--surface);
  border: 1px solid var(--surface-border);
  color: var(--text-muted);
}

.status-pill .indicator-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--text-muted);
}

.status-pill.connected .indicator-dot {
  background-color: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}

.status-pill.thinking {
  color: #FFD54F;
  border-color: rgba(255, 213, 79, 0.4);
}

.status-pill.thinking .indicator-dot {
  background-color: #FFD54F;
  box-shadow: 0 0 8px #FFD54F;
  animation: blink 0.8s infinite;
}

.status-pill.error {
  color: var(--error);
  border-color: var(--error);
}

.status-pill.error .indicator-dot {
  background-color: var(--error);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

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

.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-thumb {
  background-color: var(--surface-border);
  border-radius: 3px;
}

.message-row {
  display: flex;
  gap: 10px;
  max-width: 88%;
  animation: fadeIn 0.2s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

.message-avatar-mini {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.message-bubble {
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.92rem;
  line-height: 1.55;
  word-break: break-word;
}

.message-row.user .message-bubble {
  background-color: var(--user-bubble);
  border: 1px solid var(--user-bubble-border);
  color: var(--text);
  border-bottom-right-radius: 2px;
}

.message-row.assistant .message-bubble {
  background-color: var(--surface);
  border: 1px solid var(--surface-border);
  color: var(--text);
  border-bottom-left-radius: 2px;
}

.message-row.assistant.streaming .message-bubble {
  border-color: rgba(126, 231, 135, 0.4);
}

.message-row.system-error .message-bubble {
  background-color: var(--error-bg);
  border: 1px solid var(--error);
  color: var(--error);
}

/* Blinking typewriter cursor */
.typing-cursor {
  display: inline-block;
  width: 8px;
  height: 15px;
  background-color: var(--accent);
  margin-left: 3px;
  vertical-align: middle;
  animation: cursorBlink 0.8s infinite steps(2, start);
}

@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.message-meta {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Code and preformatted blocks inside messages */
.message-bubble pre {
  background-color: #0d1117;
  border: 1px solid var(--surface-border);
  border-radius: 6px;
  padding: 8px 10px;
  margin: 6px 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.message-bubble code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background-color: rgba(110, 118, 129, 0.2);
  padding: 2px 4px;
  border-radius: 4px;
}

/* Input Form Area */
.chat-input-bar {
  padding: 12px 16px;
  flex-shrink: 0;
  background-color: var(--surface);
  border-top: 1px solid var(--surface-border);
}

.chat-form {
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: var(--background);
  border: 1.5px solid var(--surface-border);
  border-radius: 12px;
  padding: 4px 8px 4px 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.chat-form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

.chat-input {
  flex: 1;
  max-height: 120px;
  min-height: 24px;
  resize: none;
  overflow-y: auto;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  padding: 8px 0;
  resize: none;
  max-height: 120px;
}

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

.send-btn {
  background-color: var(--primary);
  color: #FFFFFF;
  border: none;
  border-radius: 8px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

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

.send-btn:disabled {
  background-color: var(--surface-border);
  color: var(--text-muted);
  cursor: not-allowed;
}

/* Modal Styling */
.modal-overlay {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-overlay.active {
  display: flex;
}

.modal-card {
  background-color: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  width: 100%;
  max-width: 440px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
  animation: modalScale 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalScale {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  background-color: var(--background);
  border: 1px solid var(--surface-border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus {
  border-color: var(--primary);
}

.form-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.modal-feedback {
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  margin-bottom: 16px;
  display: none;
}

.modal-feedback.success {
  display: block;
  background-color: rgba(76, 175, 80, 0.15);
  border: 1px solid var(--primary);
  color: var(--accent);
}

.modal-feedback.error {
  display: block;
  background-color: var(--error-bg);
  border: 1px solid var(--error);
  color: var(--error);
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 20px;
}

.btn {
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

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

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

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

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

.btn-test {
  background-color: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}

.btn-test:hover {
  background-color: rgba(126, 231, 135, 0.1);
}

/* Quick prompt suggestions */
.chat-suggestions {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 16px 8px 16px;
  background-color: var(--surface);
  border-top: 1px solid rgba(48, 54, 61, 0.4);
}

.suggestion-chip {
  background-color: var(--background);
  border: 1px solid var(--surface-border);
  border-radius: 14px;
  padding: 8px 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.suggestion-chip:hover {
  border-color: var(--primary);
  color: var(--accent);
}

@media (max-width: 600px) {
  #app-container {
    border-left: none;
    border-right: none;
  
}

}



.bottom-nav {
  display: flex;
  justify-content: space-around;
  padding: 8px 0 calc(8px + env(safe-area-inset-bottom)) 0;
  background-color: var(--surface);
  border-top: 1px solid var(--surface-border);
  flex-shrink: 0;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
}

.nav-item span {
  font-size: 10px;
}

.nav-item.active {
  color: var(--primary);
}