ui/style.css

/* ── Reset & Tokens ──────────────────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
button {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: inherit;
  color: inherit;
}

:root {
  --bg:          #000000;
  --bg-2:        #050505;
  --bg-3:        #0A0A0A;
  --border:      #141414;
  --border-soft: #1e1e1e;
  --fg:          #ffffff;
  --fg-2:        #c0c0c0;
  --fg-muted:    #666666;
  --accent:      #ffffff;
  --amber:       #d97706;
  --green:       #22c55e;
  --sidebar-w:   240px;
  --input-h:     60px;
  --radius:      16px;
  --transition:  0.18s cubic-bezier(0.4,0,0.2,1);
}

html, body { height: 100%; overflow: hidden; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'Outfit', sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ──────────────────────────────────────────────────────────────── */
.layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ── Sidebar ─────────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.sidebar-top {
  padding: 1.5rem 1rem 1rem;
  border-bottom: 1px solid var(--border);
}

.logo { margin-bottom: 1rem; }
.logo-name {
  display: block;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}
.logo-sub {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.55rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-top: 2px;
}

.new-chat-btn {
  width: 100%;
  padding: 0.6rem 1rem;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border-soft);
  border-radius: 50px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition);
}
.new-chat-btn:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}
.new-chat-btn span { font-size: 1rem; }

.sidebar-sessions {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.sidebar-sessions::-webkit-scrollbar { width: 3px; }
.sidebar-sessions::-webkit-scrollbar-thumb { background: var(--border); }

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.55rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 0 0.5rem 0.5rem;
}

.session-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.55rem 0.6rem;
  border-radius: 10px;
  cursor: pointer;
  transition: background var(--transition);
  group: true;
}
.session-item:hover { background: var(--bg-3); }
.session-item.active { background: var(--bg-3); }

.session-name {
  flex: 1;
  font-size: 0.8rem;
  color: var(--fg-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}
.session-item.active .session-name { color: var(--fg); }

.session-del {
  opacity: 0;
  background: none;
  border: none;
  color: var(--fg-muted);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 2px 5px;
  border-radius: 4px;
  transition: opacity var(--transition), color var(--transition);
}
.session-item:hover .session-del { opacity: 1; }
.session-del:hover { color: var(--fg); }

.sidebar-bottom {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
}

.settings-trigger {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: none;
  color: var(--fg-muted);
  font-family: 'Outfit', sans-serif;
  font-size: 0.82rem;
  cursor: pointer;
  padding: 0.4rem 0;
  transition: color var(--transition);
}
.settings-trigger:hover { color: var(--fg); }

/* ── Chat Area ───────────────────────────────────────────────────────────── */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 2rem 0;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.messages::-webkit-scrollbar { width: 4px; }
.messages::-webkit-scrollbar-thumb { background: var(--border); }

/* ── Empty State ─────────────────────────────────────────────────────────── */
.empty-state {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -60%);
  text-align: center;
  pointer-events: none;
}
.empty-state.hidden { display: none; }
.empty-logo {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  filter: grayscale(1) opacity(0.5);
}
.empty-state h2 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 0.5rem;
}
.empty-state p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  max-width: 380px;
  margin: 0 auto 2rem;
}
.suggestion-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  pointer-events: all;
}
.chip {
  background: transparent;
  border: 1px solid var(--border-soft);
  color: var(--fg-2);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all var(--transition);
}
.chip:hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }

/* ── Message Bubbles ──────────────────────────────────────────────────────── */
.message-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

.msg-user {
  margin: 1.5rem 0;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
}
.msg-user-bubble {
  background: var(--bg-3);
  border: 1px solid var(--border-soft);
  padding: 0.9rem 1.3rem;
  border-radius: 20px 20px 5px 20px;
  max-width: 75%;
  font-size: 0.98rem;
  line-height: 1.55;
  color: var(--fg);
  word-wrap: break-word;
}

.msg-ai {
  margin: 1.5rem 0;
}
.msg-ai-content {
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--fg-2);
  padding: 0.25rem 0;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.msg-ai-content p { margin-bottom: 0.6em; }
.msg-ai-content h3, .msg-ai-content h4 { color: var(--fg); margin: 1em 0 0.3em; }
.msg-ai-content strong { color: var(--fg); }
.msg-ai-content a { color: var(--fg-2); text-underline-offset: 3px; }

/* Streaming cursor */
.cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--fg-muted);
  margin-left: 2px;
  animation: blink 0.8s step-end infinite;
  vertical-align: text-bottom;
}
@keyframes blink { 50% { opacity: 0; } }

/* ── Message Meta Bar ────────────────────────────────────────────────────── */
.msg-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.9rem;
  flex-wrap: nowrap;
  overflow: visible;
}

.badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 50px;
  border: 1px solid;
}
.badge-grounded  { border-color: rgba(34,197,94,0.3); color: #22c55e; }
.badge-partial   { border-color: var(--border-soft);  color: var(--fg-muted); }
.badge-general   { border-color: rgba(217,119,6,0.35); color: var(--amber); }

.badge-jur {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 50px;
  border: 1px solid var(--border-soft);
  color: var(--fg-muted);
}

.disclaimer-btn {
  background: none;
  border: none;
  color: var(--amber);
  cursor: pointer;
  font-size: 0.75rem;
  padding: 0 4px;
  line-height: 1;
  transition: opacity var(--transition);
}
.disclaimer-btn:hover { opacity: 0.7; }

.disclaimer-box {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  background: rgba(217,119,6,0.05);
  border: 1px solid rgba(217,119,6,0.2);
  border-radius: 10px;
  font-size: 0.82rem;
  color: var(--amber);
  line-height: 1.5;
  display: none;
}
.disclaimer-box.visible { display: block; }

/* Sources toggle */
.sources-toggle {
  background: none;
  border: none;
  color: var(--fg-muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  padding: 3px 9px;
  border-radius: 50px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  margin-left: auto;
}
.sources-toggle:hover { color: var(--fg); border-color: var(--border-soft); }

.sources-panel {
  margin-top: 0.75rem;
  display: none;
  flex-direction: column;
  gap: 0.4rem;
}
.sources-panel.visible { display: flex; }

.source-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.78rem;
  color: var(--fg-2);
}
.source-score {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--fg-muted);
  margin-left: auto;
}
.source-link {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.7rem;
}
.source-link:hover { color: var(--fg); }

/* ── Input Row ───────────────────────────────────────────────────────────── */
.input-row {
  padding: 1rem 2rem 1.5rem;
  border-top: 1px solid var(--border);
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
}

.input-shell {
  display: flex;
  align-items: flex-end;
  gap: 0;
  background: var(--bg-2);
  border: 1px solid var(--border-soft);
  border-radius: 20px;
  padding: 0.75rem 0.75rem 0.75rem 1.25rem;
  transition: border-color var(--transition);
}
.input-shell:focus-within { border-color: rgba(255,255,255,0.15); }

.query-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--fg);
  font-family: 'Outfit', sans-serif;
  font-size: 0.95rem;
  resize: none;
  max-height: 180px;
  line-height: 1.5;
  padding: 0;
  padding-top: 3px;
}
.query-input::placeholder { color: var(--fg-muted); }
.query-input:disabled { opacity: 0.5; }

.input-controls {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
  padding-left: 0.6rem;
}

/* Model Selector */
.model-selector {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--bg-3);
  border: 1px solid var(--border-soft);
  border-radius: 50px;
  padding: 0.35rem 0.75rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--fg-2);
  cursor: pointer;
  position: relative;
  user-select: none;
  white-space: nowrap;
  transition: all var(--transition);
}
.model-selector:hover { border-color: rgba(255,255,255,0.15); color: var(--fg); }

.model-dropdown {
  position: absolute;
  bottom: calc(100% + 8px);
  right: 0;
  background: var(--bg-2);
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  padding: 0.5rem;
  min-width: 220px;
  z-index: 100;
  box-shadow: 0 8px 32px rgba(0,0,0,0.6);
}
.model-dropdown.hidden { display: none; }

.model-group-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.55rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 0.4rem 0.6rem 0.25rem;
}
.model-option {
  display: block;
  width: 100%;
  background: none;
  border: none;
  color: var(--fg-2);
  font-family: 'Outfit', sans-serif;
  font-size: 0.82rem;
  text-align: left;
  padding: 0.45rem 0.6rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition);
}
.model-option:hover { background: var(--bg-3); color: var(--fg); }
.model-option.selected { color: var(--fg); background: var(--bg-3); }
.model-separator { border: none; border-top: 1px solid var(--border); margin: 0.4rem 0; }

.send-btn {
  width: 38px;
  height: 38px;
  background: var(--fg);
  color: var(--bg);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}
.send-btn:hover { transform: scale(1.06); }
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

/* ── Settings Panel ──────────────────────────────────────────────────────── */
.overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 50;
}
.overlay.hidden { display: none; }

.settings-panel {
  position: fixed;
  right: 0; top: 0; bottom: 0;
  width: 340px;
  background: var(--bg-2);
  border-left: 1px solid var(--border-soft);
  z-index: 51;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.settings-panel.visible { transform: translateX(0); }
.settings-panel.hidden { display: none; }

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.mono-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--fg-muted);
}

.icon-btn {
  background: none;
  border: none;
  color: var(--fg-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px;
  transition: color var(--transition);
}
.icon-btn:hover { color: var(--fg); }

.settings-section {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.settings-label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--fg-muted);
  margin-bottom: 0.75rem;
}

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.pill-btn {
  background: transparent;
  border: 1px solid var(--border-soft);
  color: var(--fg-2);
  padding: 0.4rem 0.9rem;
  border-radius: 50px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all var(--transition);
}
.pill-btn.active, .pill-btn:hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }

.select-input {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border-soft);
  color: var(--fg);
  padding: 0.6rem 1rem;
  border-radius: 10px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

.settings-footer {
  padding: 1.5rem;
  margin-top: auto;
}
.btn-save {
  width: 100%;
  background: var(--fg);
  color: var(--bg);
  border: none;
  padding: 0.85rem;
  border-radius: 50px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-save:hover { opacity: 0.9; transform: scale(1.01); }

/* ── Utility ─────────────────────────────────────────────────────────────── */
.hidden { display: none !important; }

/* Thinking Indicator */
.thinking {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.25rem 0.5rem;
}
.dots-row {
  display: flex;
  gap: 6px;
}
.thinking-dot {
  width: 5px;
  height: 5px;
  background: var(--fg);
  border-radius: 50%;
  animation: blink 1.4s infinite both;
  opacity: 0.3;
}
.status-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--fg-muted);
  letter-spacing: 0.5px;
}
@keyframes blink {
  0% { opacity: 0.2; transform: scale(0.9); }
  20% { opacity: 1; transform: scale(1.1); }
  100% { opacity: 0.2; transform: scale(0.9); }
}
.thinking-dot:nth-child(2) { animation-delay: 0.2s; }
.thinking-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce {
  0%,80%,100% { transform: translateY(0); opacity: 0.4; }
  40%          { transform: translateY(-6px); opacity: 1; }
}

/* Responsive */
@media (max-width: 640px) {
  .sidebar { display: none; }
  .message-wrap { padding: 0 1rem; }
  .input-row { padding: 0.75rem 1rem 1.25rem; }
}

/* ── Settings Tabs ───────────────────────────────────────────────────────── */
.settings-header {
  font-weight: 600;
  font-size: 0.95rem;
}

.settings-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  padding: 0 1rem;
}
.tab-btn {
  background: none;
  border: none;
  color: var(--fg-muted);
  font-family: 'Outfit', sans-serif;
  font-size: 0.82rem;
  padding: 0.75rem 0.75rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all var(--transition);
}
.tab-btn:hover { color: var(--fg); }
.tab-btn.active { color: var(--fg); border-bottom-color: var(--fg); }

.stab-content {
  flex: 1;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

/* ── Settings hints & form ───────────────────────────────────────────────── */
.settings-hint {
  font-size: 0.78rem;
  color: var(--fg-muted);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.text-input {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border-soft);
  color: var(--fg);
  padding: 0.55rem 0.9rem;
  border-radius: 10px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  outline: none;
}
.text-input:focus { border-color: rgba(255,255,255,0.2); }
.text-input::placeholder { color: var(--fg-muted); }

.form-row {
  display: flex;
  gap: 0.5rem;
}

.btn-add {
  width: 100%;
  margin-top: 0.75rem;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border-soft);
  border-radius: 50px;
  padding: 0.55rem;
  font-family: 'Outfit', sans-serif;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-add:hover { background: var(--fg); color: var(--bg); }

/* ── Model Toggle Rows ───────────────────────────────────────────────────── */
.model-provider-group {
  padding: 1rem 1.5rem 0;
}
.model-provider-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0.5rem;
}
.model-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border);
}
.model-toggle-row:last-child { border-bottom: none; }
.model-toggle-name {
  font-size: 0.82rem;
  color: var(--fg-2);
  flex: 1;
}
.model-toggle-id {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--fg-muted);
  margin-right: 0.75rem;
}
.model-del-btn {
  opacity: 0.25;
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1;
  padding: 2px 6px;
  border-radius: 5px;
  margin-left: 0.5rem;
  transition: all var(--transition);
  flex-shrink: 0;
}
.model-toggle-row:hover .model-del-btn { opacity: 1; }
.model-del-btn:hover { color: #f87171; background: rgba(248,113,113,0.08); }

/* Toggle Switch */
.toggle-switch {
  position: relative;
  width: 34px;
  height: 18px;
  flex-shrink: 0;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border-soft);
  border-radius: 18px;
  cursor: pointer;
  transition: background var(--transition);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 12px; height: 12px;
  left: 3px; top: 3px;
  background: var(--fg-muted);
  border-radius: 50%;
  transition: all var(--transition);
}
.toggle-switch input:checked + .toggle-slider { background: rgba(255,255,255,0.15); }
.toggle-switch input:checked + .toggle-slider::before {
  background: var(--fg);
  transform: translateX(16px);
}

/* Custom model list */
.custom-model-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1.5rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--fg-2);
}
.custom-del-btn {
  background: none;
  border: none;
  color: var(--fg-muted);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: color var(--transition);
}
.custom-del-btn:hover { color: var(--fg); }

/* Icon Ghost Action Buttons (Copy, Retry, Edit) */
.icon-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  color: var(--fg-muted);
  transition: color var(--transition), background var(--transition);
  flex-shrink: 0;
}
.icon-action-btn:hover {
  color: var(--fg);
  background: rgba(255,255,255,0.06);
}
.icon-action-btn svg { display: block; }

/* AI action buttons row — appears on hover of the AI message */
.msg-ai-actions {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  opacity: 0;
  transition: opacity var(--transition);
  margin-left: auto;
}
.msg-ai:hover .msg-ai-actions,
.msg-meta:hover .msg-ai-actions {
  opacity: 1;
}

/* User bubble action buttons row — appears on hover */
.msg-user-actions {
  display: flex;
  gap: 0.1rem;
  opacity: 0;
  transition: opacity var(--transition);
}
.msg-user:hover .msg-user-actions {
  opacity: 1;
}