/* ======================================================================
   Agent Bridge -- Light Theme Design System
   Matching Google Antigravity reference: light canvas, dot-grid,
   centered card, numbered tool rail, suggestion chips.
   Font: DM Sans. No emojis.
   ====================================================================== */

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

:root {
  --bg: #f8f9fa;
  --bg-card: #ffffff;
  --bg-hover: #f1f3f4;
  --bg-input: #ffffff;
  --bg-chip: #ffffff;
  --bg-output: #f8f9fa;

  --border: #dadce0;
  --border-light: #e8eaed;
  --border-focus: #4d90fe;

  --text: #202124;
  --text-secondary: #5f6368;
  --text-muted: #9aa0a6;
  --text-link: #1a73e8;

  --accent: #1a73e8;
  --accent-light: #e8f0fe;
  --accent-surface: rgba(26, 115, 232, 0.08);

  --success: #34a853;
  --error: #ea4335;
  --warning: #fbbc04;

  --font: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Consolas', monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --radius-pill: 100px;

  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 1px 6px rgba(0, 0, 0, 0.06), 0 2px 32px rgba(0, 0, 0, 0.04);

  --grid-color: #e0e0e0;
  --grid-size: 40px;
}

html,
body {
  height: 100%;
  font-family: var(--font);
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

::selection {
  background: var(--accent-light);
  color: var(--accent);
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

/* --- Layout ---------------------------------------------------------- */
#app {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* --- Dot Grid Background --------------------------------------------- */
#canvas {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--bg);
  background-image: radial-gradient(circle, var(--grid-color) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  overflow: hidden;
}

/* --- Status Bar ------------------------------------------------------ */
#status-bar {
  position: absolute;
  top: 16px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-muted);
  z-index: 10;
}

#connection-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--error);
  transition: background 0.3s;
}

#connection-indicator.connected {
  background: var(--success);
}

#status-text {
  font-weight: 500;
}

/* --- Tool Rail (Left Numbered Buttons) ------------------------------- */
#tool-rail {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 10px;
  z-index: 10;
  background: transparent;
}

.rail-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  box-shadow: var(--shadow);
  position: relative;
}

.rail-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.rail-btn:active {
  transform: scale(0.95);
}

.rail-btn.active {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
}

.rail-btn[title]::after {
  content: attr(title);
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--text);
  color: #fff;
  font-size: 11px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
}

.rail-btn:hover[title]::after {
  opacity: 1;
}

/* --- Center Card ----------------------------------------------------- */
#center-card {
  position: relative;
  width: 100%;
  max-width: 600px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 36px 40px 28px;
  box-shadow: var(--shadow-card);
  animation: cardIn 0.3s ease-out;
  z-index: 5;
}

@keyframes cardIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

#card-close {
  position: absolute;
  top: 14px;
  right: 18px;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
  padding: 4px;
  transition: color 0.15s;
}

#card-close:hover {
  color: var(--text);
}

#greeting {
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 20px;
  letter-spacing: -0.4px;
  text-align: center;
}

/* --- Prompt Input ---------------------------------------------------- */
#prompt-container {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 4px 6px 4px 18px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

#prompt-container:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-surface);
}

#prompt-input,
#conv-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font);
  font-size: 14px;
  color: var(--text);
  padding: 10px 0;
}

#prompt-input::placeholder,
#conv-input::placeholder {
  color: var(--text-muted);
}

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

#send-btn:hover,
#conv-send-btn:hover {
  background: #1557b0;
  transform: scale(1.05);
}

/* --- Icon Bar -------------------------------------------------------- */
#icon-bar {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 12px;
  padding: 0 4px;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.12s;
}

.icon-btn:hover {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

/* --- Suggestion Chips ------------------------------------------------ */
#suggestion-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  background: var(--bg-chip);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.chip:hover {
  border-color: var(--text-muted);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.chip:active {
  transform: scale(0.97);
}

/* --- Bottom Links ---------------------------------------------------- */
#bottom-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

.bottom-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

.bottom-link:hover {
  color: var(--accent);
}

/* --- Conversation View ----------------------------------------------- */
#conversation {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 780px;
  height: 100%;
  padding: 60px 20px 0;
}

#conversation.hidden {
  display: none;
}

#messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.msg {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: 18px;
  font-size: 14px;
  line-height: 1.55;
  animation: msgIn 0.2s ease-out;
}

@keyframes msgIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.msg-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.msg-body {
  word-wrap: break-word;
  white-space: pre-wrap;
}

.msg-user {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg-user .msg-label {
  color: rgba(255, 255, 255, 0.6);
}

.msg-agent {
  align-self: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-bottom-left-radius: 4px;
}

.msg-agent .msg-label {
  color: var(--text-muted);
}

.msg-system {
  align-self: center;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  padding: 6px 14px;
  background: var(--accent-light);
  border-radius: var(--radius-pill);
}

.msg-tool {
  align-self: flex-start;
  background: var(--accent-light);
  border: 1px solid rgba(26, 115, 232, 0.15);
  border-bottom-left-radius: 4px;
}

.msg-tool .msg-label {
  color: var(--accent);
}

.msg-error {
  align-self: flex-start;
  background: #fce8e6;
  border: 1px solid rgba(234, 67, 53, 0.15);
}

.msg-error .msg-label {
  color: var(--error);
}

/* --- Conversation Input ---------------------------------------------- */
#conv-input-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 0 20px;
  border-top: 1px solid var(--border-light);
  background: transparent;
}

#conv-input {
  flex: 1;
  padding: 12px 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-pill);
  font-family: var(--font);
  font-size: 14px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

#conv-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-surface);
  outline: none;
}

/* --- Output Area ----------------------------------------------------- */
#output-area {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  max-height: 300px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
}

#output-area.hidden {
  display: none;
}

#output-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border-light);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

#close-output {
  background: none;
  border: none;
  font-size: 16px;
  color: var(--text-muted);
  cursor: pointer;
}

#output-content {
  flex: 1;
  overflow-y: auto;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-secondary);
  white-space: pre-wrap;
}

.progress-line {
  color: var(--text-muted);
  padding: 1px 0;
}

.progress-line::before {
  content: '> ';
  color: var(--accent);
}

.transcript-preview {
  max-height: 200px;
  overflow-y: auto;
  padding: 8px;
  background: var(--bg-output);
  border-radius: var(--radius-sm);
  margin-top: 6px;
  border: 1px solid var(--border-light);
}

.download-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 6px 14px;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s;
}

.download-link:hover {
  background: #1557b0;
}

/* --- Spinner --------------------------------------------------------- */
.spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: 4px;
  vertical-align: middle;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* --- Settings Panel -------------------------------------------------- */
.settings-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.12s;
  margin-left: 4px;
}

.settings-btn:hover {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

#settings-panel {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(2px);
  animation: fadeIn 0.15s ease-out;
}

#settings-panel.hidden {
  display: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.settings-card {
  width: 100%;
  max-width: 480px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
}

.settings-header h2 {
  font-size: 15px;
  font-weight: 600;
}

.settings-header button {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-muted);
  cursor: pointer;
}

.settings-header button:hover {
  color: var(--text);
}

.settings-body {
  padding: 20px;
}

.settings-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.settings-input-row {
  display: flex;
  gap: 8px;
}

.settings-input-row input {
  flex: 1;
  padding: 9px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text);
  background: var(--bg);
  outline: none;
  transition: border-color 0.15s;
}

.settings-input-row input:focus {
  border-color: var(--accent);
}

.settings-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

.settings-divider {
  height: 1px;
  background: var(--border-light);
  margin: 16px 0;
}

.detection-box {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.detect-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

.detect-dot.found {
  background: var(--success);
}

.detect-dot.missing {
  background: var(--error);
}

.detect-details {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
  line-height: 1.5;
}

.settings-actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.btn-primary {
  padding: 8px 18px;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary:hover {
  background: #1557b0;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-outline {
  padding: 8px 18px;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
}

.btn-outline:hover {
  border-color: var(--text-muted);
}

.btn-outline:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-danger {
  color: var(--error);
  border-color: rgba(234, 67, 53, 0.3);
}

.btn-danger:hover {
  border-color: var(--error);
  background: #fce8e6;
}

/* --- Responsive ------------------------------------------------------ */
@media (max-width: 640px) {
  #center-card {
    margin: 0 12px;
    padding: 28px 20px 22px;
  }

  #greeting {
    font-size: 18px;
  }

  #tool-rail {
    padding: 12px 6px;
  }

  .rail-btn {
    width: 32px;
    height: 32px;
    font-size: 11px;
  }
}