/* ── Reset & base ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0f1117;
  --surface:   #1a1d27;
  --border:    #2e3147;
  --accent:    #4f8ef7;
  --accent-dk: #2f6fd4;
  --text:      #e8eaf0;
  --text-dim:  #8890a8;
  --user-bg:   #1e3a5f;
  --agent-bg:  #1a1d27;
  --radius:    12px;
  --font:      'Segoe UI', system-ui, sans-serif;
}

html, body { height: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ── Layout ─────────────────────────────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

/* ── Header ─────────────────────────────────────────────────────── */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  flex-shrink: 0;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 52px;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.3px;
}

.tagline {
  font-size: 0.8rem;
  color: var(--text-dim);
  flex: 1;
}

#user-label {
  font-size: 0.78rem;
  color: var(--text-dim);
  white-space: nowrap;
}

#new-session-btn, #logout-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
#new-session-btn:hover { border-color: var(--accent); color: var(--accent); }
#logout-btn:hover { border-color: #e05c5c; color: #e05c5c; }

/* ── Chat area ───────────────────────────────────────────────────── */
#chat-area {
  flex: 1;
  overflow-y: auto;
  padding: 20px 16px;
  scroll-behavior: smooth;
}

#messages { display: flex; flex-direction: column; gap: 14px; }

/* ── Message bubbles ─────────────────────────────────────────────── */
.message { display: flex; }

.message.user  { justify-content: flex-end; }
.message.agent { justify-content: flex-start; }

.bubble {
  max-width: 78%;
  padding: 12px 16px;
  border-radius: var(--radius);
  line-height: 1.55;
  font-size: 0.92rem;
  word-break: break-word;
}

.message.user  .bubble { background: var(--user-bg); border-bottom-right-radius: 3px; }
.message.agent .bubble { background: var(--agent-bg); border: 1px solid var(--border); border-bottom-left-radius: 3px; }

/* Markdown inside agent bubbles */
.bubble h1, .bubble h2, .bubble h3 { margin-top: 10px; margin-bottom: 4px; font-size: 1em; font-weight: 600; }
.bubble h1:first-child, .bubble h2:first-child, .bubble h3:first-child { margin-top: 0; }
.bubble p { margin-bottom: 8px; }
.bubble p:last-child { margin-bottom: 0; }
.bubble ul, .bubble ol { margin: 6px 0 6px 18px; }
.bubble li { margin-bottom: 3px; }
.bubble strong { color: #c8d8f8; }
.bubble code { background: #0a0c14; padding: 1px 5px; border-radius: 4px; font-size: 0.88em; font-family: 'Cascadia Code', 'Fira Code', monospace; }
.bubble pre { background: #0a0c14; border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; overflow-x: auto; margin: 8px 0; }
.bubble pre code { background: none; padding: 0; }
.bubble a { color: var(--accent); text-decoration: underline; }
.bubble hr { border: none; border-top: 1px solid var(--border); margin: 10px 0; }
.bubble table { border-collapse: collapse; width: 100%; margin: 8px 0; font-size: 0.88em; }
.bubble th, .bubble td { border: 1px solid var(--border); padding: 5px 10px; text-align: left; }
.bubble th { background: #0a0c14; color: var(--text-dim); }

/* Thinking animation */
.message.thinking .bubble { padding: 14px 18px; }
.dots { display: inline-flex; gap: 5px; }
.dots span {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-dim);
  animation: bounce 1.2s infinite ease-in-out;
}
.dots span:nth-child(2) { animation-delay: 0.2s; }
.dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce {
  0%, 80%, 100% { transform: scale(0.7); opacity: 0.4; }
  40%           { transform: scale(1.0); opacity: 1.0; }
}

/* Step trace inside thinking bubble */
.step-trace { margin-top: 10px; display: flex; flex-direction: column; gap: 3px; }

.step-item {
  font-size: 0.75rem; color: var(--text-dim); opacity: 0.55; padding-left: 2px;
}

.step-error {
  font-size: 0.75rem; color: #e05c5c; opacity: 0.8; padding-left: 2px;
}

.step-current {
  font-size: 0.75rem; color: var(--text-dim); opacity: 0.9; padding-left: 2px;
  display: flex; align-items: center; gap: 5px;
}
.step-current::before {
  content: ''; display: inline-block; width: 5px; height: 5px;
  border-radius: 50%; background: var(--accent);
  flex-shrink: 0;
  animation: pulse 1.4s infinite ease-in-out;
}
@keyframes pulse {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50%       { opacity: 1.0; transform: scale(1.1); }
}

/* Collapsed step log (shown above the reply after agent finishes) */
.step-log-toggle {
  font-size: 0.72rem; color: var(--text-dim);
  cursor: pointer; user-select: none;
}
.step-log-toggle:hover { color: var(--accent); }

/* ── Footer / input ──────────────────────────────────────────────── */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 12px 16px 10px;
  flex-shrink: 0;
}

.input-row {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

#user-input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.92rem;
  line-height: 1.5;
  padding: 10px 14px;
  resize: none;
  min-height: 44px;
  max-height: 160px;
  transition: border-color 0.15s;
  outline: none;
}
#user-input:focus { border-color: var(--accent); }
#user-input::placeholder { color: var(--text-dim); }

#send-btn {
  background: var(--accent);
  border: none;
  border-radius: 10px;
  color: #fff;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 600;
  height: 44px;
  padding: 0 20px;
  transition: background 0.15s;
  white-space: nowrap;
}
#send-btn:hover:not(:disabled) { background: var(--accent-dk); }
#send-btn:disabled { opacity: 0.4; cursor: default; }

#status-bar {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 0.72rem;
  color: var(--text-dim);
}

/* ── Projects page ───────────────────────────────────────────────── */

/* Project-page color tokens (dark — matches chat page palette) */
body.projects-page {
  --projects-bg:               #0f1117;
  --projects-sidebar-bg:       #0d1128;
  --projects-sidebar-text:     #e8eaf0;
  --projects-sidebar-border:   #2e3147;
  --projects-sidebar-active:   #1e2560;
  --projects-card-bg:          #1a1d27;
  --projects-card-border:      #2e3147;
  --projects-accent:           #4f8ef7;
  --projects-accent-hover:     #2f6fd4;
  --projects-text-primary:     #e8eaf0;
  --projects-text-secondary:   #8890a8;
  --projects-destructive:      #e05c5c;
  display: flex;
  flex-direction: row;
  height: 100vh;
  overflow: hidden;
  font-family: 'Segoe UI', system-ui, sans-serif;
}

/* ── Three-column layout ── */
body.projects-page aside[role="navigation"] {
  width: 240px;
  background: var(--projects-sidebar-bg);
  color: var(--projects-sidebar-text);
  flex-shrink: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  border-right: 1px solid var(--projects-sidebar-border);
}

body.projects-page main {
  flex: 1;
  background: var(--projects-bg);
  overflow-y: auto;
  padding: 32px 40px;
  color: var(--projects-text-primary);
}

body.projects-page aside[role="complementary"] {
  width: 280px;
  background: var(--projects-card-bg);
  border-left: 1px solid var(--projects-card-border);
  flex-shrink: 0;
  overflow-y: auto;
  padding: 24px;
  position: sticky;
  top: 0;
  height: 100vh;
}

/* ── Sidebar components ── */
body.projects-page .sidebar-branding {
  font-size: 16px;
  font-weight: 600;
  color: var(--projects-accent);
}

body.projects-page .sidebar-subtitle {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 16px;
}

body.projects-page .sidebar-search-wrap {
  position: relative;
  margin-bottom: 8px;
}

body.projects-page .sidebar-search-wrap::before {
  content: '⌕';
  position: absolute;
  left: 9px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255, 255, 255, 0.5);
  font-size: 15px;
  pointer-events: none;
}

body.projects-page .sidebar-search {
  width: 100%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  color: #ffffff;
  font-size: 14px;
  padding: 8px 8px 8px 30px;
  font-family: inherit;
}

body.projects-page .sidebar-search::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

body.projects-page .sidebar-search:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.4);
}

body.projects-page .sidebar-section-label {
  font-size: 12px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 16px 0 8px;
}

body.projects-page .project-item {
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background 0.15s;
}

body.projects-page .project-item:hover {
  background: rgba(255, 255, 255, 0.07);
}

body.projects-page .project-item.active {
  background: #2d3480;
}

body.projects-page .new-project-btn {
  display: block;
  width: 100%;
  background: var(--projects-accent);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  margin-bottom: 16px;
  font-family: inherit;
  transition: background 0.15s;
}

body.projects-page .new-project-btn:hover {
  background: var(--projects-accent-hover);
}

body.projects-page .sidebar-empty-state {
  text-align: center;
  color: rgba(255, 255, 255, 0.4);
  font-size: 12px;
  padding: 16px 0;
}

body.projects-page .sidebar-user-row {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  position: relative;
  border-radius: 6px;
  padding: 10px 8px 0;
  margin-left: -8px;
  margin-right: -8px;
  transition: background 0.15s;
}

body.projects-page .sidebar-user-row:hover {
  background: rgba(255, 255, 255, 0.05);
}

body.projects-page .user-dropdown {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--projects-card-bg);
  border: 1px solid var(--projects-card-border);
  border-radius: 8px;
  padding: 4px;
  z-index: 100;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

body.projects-page .user-dropdown-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--projects-text-primary);
  font-size: 13px;
  padding: 8px 10px;
  border-radius: 5px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.12s, color 0.12s;
}

body.projects-page .user-dropdown-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--projects-destructive);
}

body.projects-page .sidebar-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--projects-accent);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

body.projects-page .sidebar-user-name {
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
}

body.projects-page .sidebar-user-role {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.5);
}

/* ── Typography ── */
body.projects-page h1.page-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--projects-text-primary);
}

body.projects-page p.page-subtitle {
  font-size: 14px;
  color: var(--projects-text-secondary);
  margin-top: 4px;
  margin-bottom: 32px;
}

body.projects-page h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--projects-text-primary);
  margin: 0;
}

/* ── Form / card components ── */
body.projects-page .form-page-header {
  margin-bottom: 24px;
}

body.projects-page .form-section {
  background: var(--projects-card-bg);
  border: 1px solid var(--projects-card-border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 16px;
}

body.projects-page .section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

body.projects-page .section-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--projects-accent);
  color: #ffffff;
  border-radius: 50%;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}

body.projects-page .field-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

body.projects-page .upload-area {
  border: 2px dashed var(--projects-card-border);
  border-radius: 8px;
  padding: 24px 16px;
  text-align: center;
  color: var(--projects-text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

body.projects-page .upload-area:hover {
  border-color: var(--projects-accent);
  background: rgba(79, 142, 247, 0.05);
}

body.projects-page .info-box {
  background: rgba(79, 142, 247, 0.08);
  border: 1px solid rgba(79, 142, 247, 0.25);
  border-radius: 8px;
  padding: 16px;
  font-size: 14px;
  color: var(--projects-text-secondary);
}

body.projects-page .error-banner {
  background: rgba(224, 92, 92, 0.1);
  border: 1px solid rgba(224, 92, 92, 0.35);
  border-radius: 6px;
  padding: 12px;
  color: var(--projects-destructive);
  font-size: 14px;
  margin-top: 12px;
}

/* ── Form inputs (scoped to projects page) ── */
body.projects-page input[type="text"],
body.projects-page input[type="search"]:not(.sidebar-search),
body.projects-page textarea,
body.projects-page select {
  width: 100%;
  border: 1px solid var(--projects-card-border);
  border-radius: 6px;
  padding: 0 12px;
  font-size: 14px;
  color: var(--projects-text-primary);
  background: var(--projects-bg);
  font-family: inherit;
  transition: border-color 0.15s;
}

body.projects-page input[type="text"],
body.projects-page input[type="search"]:not(.sidebar-search) {
  height: 40px;
}

body.projects-page textarea {
  min-height: 96px;
  padding: 10px 12px;
  resize: vertical;
  line-height: 1.5;
}

body.projects-page select {
  height: 40px;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

body.projects-page input[type="text"]:focus,
body.projects-page input[type="search"]:not(.sidebar-search):focus,
body.projects-page textarea:focus,
body.projects-page select:focus {
  border-color: var(--projects-accent);
  outline: 2px solid rgba(79, 142, 247, 0.2);
  outline-offset: 0;
}

body.projects-page .field-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--projects-text-secondary);
  margin-bottom: 8px;
  display: block;
}

body.projects-page .field-group {
  margin-bottom: 20px;
}

body.projects-page .name-counter-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-top: 4px;
}

body.projects-page .char-counter {
  font-size: 12px;
  color: var(--projects-text-secondary);
  flex-shrink: 0;
  white-space: nowrap;
}

body.projects-page .field-helper {
  font-size: 12px;
  color: var(--projects-text-secondary);
}

/* ── Buttons ── */
body.projects-page .btn-primary {
  background: var(--projects-accent);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}

body.projects-page .btn-primary:hover {
  background: var(--projects-accent-hover);
}

body.projects-page .btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

body.projects-page .btn-secondary {
  background: transparent;
  border: 1px solid var(--projects-card-border);
  color: var(--projects-text-secondary);
  font-size: 14px;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  transition: color 0.15s, border-color 0.15s;
}

body.projects-page .btn-secondary:hover {
  color: var(--projects-text-primary);
  border-color: var(--projects-text-secondary);
}

body.projects-page .btn-destructive {
  background: transparent;
  border: none;
  color: var(--projects-destructive);
  font-size: 14px;
  padding: 8px 16px;
  cursor: pointer;
  font-family: inherit;
}

/* ── Right panel ── */
body.projects-page .panel-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--projects-text-primary);
  margin-bottom: 16px;
}

body.projects-page .panel-section-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--projects-text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

body.projects-page .context-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

body.projects-page .context-row-label,
body.projects-page .context-label {
  font-size: 12px;
  color: var(--projects-text-secondary);
}

body.projects-page .context-chip {
  background: rgba(79, 142, 247, 0.15);
  color: var(--projects-accent);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 600;
}

body.projects-page .context-chip.empty {
  background: rgba(255, 255, 255, 0.06);
  color: var(--projects-text-secondary);
}

body.projects-page .panel-divider {
  border-top: 1px solid var(--projects-card-border);
  margin: 16px 0;
}

body.projects-page .recommended-card {
  background: rgba(79, 142, 247, 0.1);
  border: 1px solid rgba(79, 142, 247, 0.25);
  border-radius: 8px;
  padding: 12px;
}

body.projects-page .recommended-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--projects-text-primary);
}

body.projects-page .recommended-card-secondary {
  font-size: 12px;
  color: var(--projects-text-secondary);
  margin-top: 4px;
}

body.projects-page .recommended-card.placeholder {
  color: var(--projects-text-secondary);
  font-size: 13px;
  font-style: italic;
}

body.projects-page .why-link {
  font-size: 12px;
  color: var(--projects-accent);
  cursor: pointer;
  text-decoration: none;
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
  display: inline-block;
  margin-top: 8px;
}

body.projects-page .why-link:hover {
  text-decoration: underline;
}

/* ── Detail view ── */
body.projects-page .detail-card {
  background: var(--projects-card-bg);
  border: 1px solid var(--projects-card-border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 24px;
}

body.projects-page .detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

body.projects-page .detail-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--projects-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

body.projects-page .detail-value {
  font-size: 14px;
  color: var(--projects-text-primary);
}

body.projects-page .detail-row-full {
  grid-column: 1 / -1;
}

body.projects-page .detail-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
}

/* ── Utility ── */
body.projects-page .form-action-row {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 24px;
}

body.projects-page .welcome-panel {
  max-width: 560px;
}

body.projects-page .welcome-panel h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--projects-text-primary);
  margin-bottom: 8px;
}

body.projects-page .welcome-panel p {
  font-size: 14px;
  color: var(--projects-text-secondary);
  margin-bottom: 24px;
}

/* ── Responsive layout ──────────────────────────────────────────── */

/* Tablet (≤ 1100px): drop right panel */
@media (max-width: 1100px) {
  body.projects-page aside[role="complementary"] {
    display: none;
  }
}

/* Narrow tablet (≤ 860px): narrow sidebar */
@media (max-width: 860px) {
  body.projects-page aside[role="navigation"] {
    width: 200px;
  }
  body.projects-page main {
    padding: 20px 24px;
  }
}

/* Mobile (≤ 680px): stack sidebar above main */
@media (max-width: 680px) {
  body.projects-page {
    flex-direction: column;
  }
  body.projects-page aside[role="navigation"] {
    width: 100%;
    height: auto;
    max-height: 45vh;
    border-right: none;
    border-bottom: 1px solid var(--projects-sidebar-border);
    padding: 16px;
    overflow-y: auto;
    flex-shrink: 0;
  }
  body.projects-page main {
    padding: 16px;
    overflow-y: auto;
    flex: 1;
  }
  /* Stack 2-column grids to single column */
  body.projects-page .field-grid-2,
  body.projects-page .detail-grid {
    grid-template-columns: 1fr;
  }
  body.projects-page .form-section {
    margin-bottom: 24px;
  }
}

/* ── Project badge ─────────────────────────────────────────────── */
/* Phase 7: reusable badge class for project context display.     */
/* The existing #project-context-label span uses equivalent       */
/* inline styles; this class is available for future refactoring. */
.project-badge {
  font-size: 12px;
  font-weight: 600;
  background: rgba(79, 142, 247, 0.15);
  color: var(--accent);
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
}