/* ==========================================================================
   ed — AI Assistant Interface
   Aesthetic: Obsidian & Cognac — luxury concierge command center
   ========================================================================== */

:root {
  --bg: #09090b;
  --bg-elevated: #0f0f12;
  --surface: #16161a;
  --surface-hover: #1c1c21;
  --border: #27272a;
  --border-subtle: #1e1e22;

  --text: #fafaf9;
  --text-secondary: #a8a29e;
  --text-tertiary: #6b6560;

  --gold: #c9a84c;
  --gold-dim: #a68a3e;
  --gold-bright: #e4c65b;
  --gold-glow: rgba(201, 168, 76, 0.08);
  --gold-glow-strong: rgba(201, 168, 76, 0.15);

  --user-bg: #1a1714;
  --user-border: #2e2820;
  --bot-bg: #111113;
  --bot-border: #222226;

  --tool-bg: #0d0d10;
  --tool-border: #1a1a1f;
  --tool-accent: #c9a84c;

  --success: #4ade80;
  --warning: #fbbf24;
  --error: #f87171;

  --font-body: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-serif: 'Newsreader', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 100px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html, body {
  height: 100%;
  height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

/* App Shell */
#app {
  display: flex;
  flex-direction: column;
  height: 100%;
  height: 100dvh;
  max-width: 860px;
  margin: 0 auto;
  position: relative;
}

/* === HEADER === */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
  z-index: 10;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

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

.brand-mark {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.03em;
  line-height: 1;
  user-select: none;
}

.brand-e { color: var(--gold); }
.brand-d { color: var(--text-secondary); }

.header-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

#status {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

#status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--warning);
  transition: background 0.4s var(--ease-out);
}
#status-dot.online { background: var(--success); box-shadow: 0 0 6px rgba(74, 222, 128, 0.4); }
#status-dot.offline { background: var(--error); }
#status-dot.connecting { background: var(--warning); animation: pulse 1.5s ease infinite; }

.header-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.header-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s var(--ease-out);
}

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

.header-btn.active {
  color: var(--gold);
  border-color: var(--border);
  background: var(--gold-glow);
}

/* === MESSAGES === */
main#messages {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

/* Welcome Card */
.welcome-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  gap: 12px;
  padding: 40px 20px;
  opacity: 0;
  animation: welcomeFade 0.8s 0.3s var(--ease-out) forwards;
}

.welcome-icon {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 48px;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 4px;
}

.welcome-e { color: var(--gold); }
.welcome-d { color: var(--text-tertiary); }

.welcome-text {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
}

.welcome-sub {
  font-size: 13px;
  color: var(--text-tertiary);
  text-align: center;
  max-width: 280px;
}

/* Message Bubbles */
.message {
  max-width: 82%;
  padding: 10px 14px;
  font-size: 14.5px;
  line-height: 1.55;
  word-wrap: break-word;
  overflow-wrap: break-word;
  opacity: 0;
  animation: msgIn 0.3s var(--ease-out) forwards;
}

.message.user { white-space: pre-wrap; }

.message.user {
  align-self: flex-end;
  background: var(--user-bg);
  border: 1px solid var(--user-border);
  border-radius: var(--radius-md) var(--radius-md) 4px var(--radius-md);
  color: var(--text);
}

.message.bot {
  align-self: flex-start;
  background: var(--bot-bg);
  border: 1px solid var(--bot-border);
  border-radius: var(--radius-md) var(--radius-md) var(--radius-md) 4px;
  color: var(--text);
}

.message .msg-text { display: block; }

/* Markdown rendered content */
.msg-text .md-p { margin: 0 0 8px 0; }
.msg-text .md-p:last-child { margin-bottom: 0; }

.msg-text .md-h1, .msg-text .md-h2, .msg-text .md-h3, .msg-text .md-h4 {
  color: var(--gold);
  font-family: var(--font-body);
  margin: 12px 0 6px 0;
  line-height: 1.3;
}
.msg-text .md-h1 { font-size: 17px; font-weight: 700; }
.msg-text .md-h2 { font-size: 15px; font-weight: 600; }
.msg-text .md-h3 { font-size: 14px; font-weight: 600; }
.msg-text .md-h4 { font-size: 13px; font-weight: 600; color: var(--text-secondary); }

.msg-text strong { color: var(--text); font-weight: 600; }
.msg-text em { font-style: italic; color: var(--text-secondary); }

.msg-text .md-link {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-dim);
  transition: border-color 0.15s;
}
.msg-text .md-link:hover { border-color: var(--gold-bright); }

.msg-text .md-ul, .msg-text .md-ol {
  margin: 6px 0;
  padding-left: 20px;
}
.msg-text .md-li, .msg-text .md-oli {
  margin: 2px 0;
  color: var(--text);
  font-size: 14px;
}
.msg-text .md-li::marker { color: var(--gold-dim); }

.msg-text .md-inline-code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--gold);
}

.msg-text .md-code-block {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin: 8px 0;
  overflow-x: auto;
  line-height: 1.5;
  color: var(--text-secondary);
  white-space: pre;
}

/* Markdown tables */
.msg-text .md-table-wrap {
  overflow-x: auto;
  margin: 8px 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.msg-text .md-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  font-family: var(--font-mono);
}

.msg-text .md-table th {
  background: var(--surface);
  color: var(--gold);
  font-weight: 600;
  text-align: left;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.msg-text .md-table td {
  padding: 5px 10px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  white-space: nowrap;
}

.msg-text .md-table tr:last-child td { border-bottom: none; }
.msg-text .md-table tr:hover td { background: var(--gold-glow); }

/* Stream text also gets markdown */
.stream-text .md-p { margin: 0 0 8px 0; }
.stream-text .md-p:last-child { margin-bottom: 0; }
.stream-text .md-table-wrap { margin: 6px 0; }
.stream-text .md-table { font-size: 12px; }
.stream-text strong { color: var(--text); font-weight: 600; }
.stream-text .md-h2, .stream-text .md-h3 { color: var(--gold); font-weight: 600; margin: 8px 0 4px; }

.message .timestamp {
  display: block;
  font-size: 10px;
  color: var(--text-tertiary);
  margin-top: 6px;
  font-variant-numeric: tabular-nums;
}

/* === TYPING INDICATOR === */
#typing-indicator {
  align-self: flex-start;
  display: none;
  align-items: center;
  gap: 4px;
  padding: 12px 16px;
}

#typing-indicator.visible { display: flex; }

.typing-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold-dim);
  animation: typingBounce 1.4s ease infinite;
}
.typing-dot:nth-child(2) { animation-delay: 0.15s; }
.typing-dot:nth-child(3) { animation-delay: 0.3s; }

.typing-label {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-left: 6px;
  font-style: italic;
}

/* === STREAM CONTAINER (Tool Activity Feed) === */
.stream-container {
  align-self: flex-start;
  width: 100%;
  max-width: 92%;
  display: flex;
  flex-direction: column;
  gap: 3px;
  opacity: 0;
  animation: msgIn 0.25s var(--ease-out) forwards;
}

/* Individual Tool Call */
.stream-tool {
  background: var(--tool-bg);
  border: 1px solid var(--tool-border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  transition: all 0.2s var(--ease-out);
  overflow: hidden;
}

.stream-tool-header {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-tertiary);
  min-height: 18px;
}

.tool-icon {
  width: 14px;
  height: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-dim);
  flex-shrink: 0;
  font-size: 11px;
}

.tool-icon svg {
  width: 12px;
  height: 12px;
}

.tool-name {
  color: var(--gold);
  font-weight: 500;
  font-size: 12px;
  white-space: nowrap;
}

.tool-detail {
  color: var(--text-tertiary);
  font-size: 11px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.stream-tool-result {
  margin-top: 4px;
  padding-top: 4px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-tertiary);
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* === TOOL GROUP (Collapsed) === */
.tool-group {
  background: var(--tool-bg);
  border: 1px solid var(--tool-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all 0.2s var(--ease-out);
}

.tool-group-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  cursor: pointer;
  user-select: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-tertiary);
  transition: background 0.15s;
}

.tool-group-header:hover { background: var(--surface-hover); }

.tool-group-chevron {
  width: 14px;
  height: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  transition: transform 0.25s var(--ease-out);
  flex-shrink: 0;
}

.tool-group.expanded .tool-group-chevron { transform: rotate(90deg); }

.tool-group-name,
.tool-group-label {
  color: var(--gold);
  font-weight: 500;
}

.tool-group-detail {
  color: var(--text-tertiary);
  font-size: 11px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.tool-group-count {
  background: var(--gold-glow-strong);
  color: var(--gold);
  font-size: 10px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.02em;
}

.tool-group-items {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease-out);
}

.tool-group.expanded .tool-group-items {
  max-height: 2000px;
}

.tool-group-items .stream-tool {
  border: none;
  border-top: 1px solid var(--border-subtle);
  border-radius: 0;
  background: transparent;
  padding: 5px 10px 5px 30px;
}

/* === STREAM TEXT (Bot response in stream) === */
.stream-text {
  padding: 10px 14px;
  background: var(--bot-bg);
  border: 1px solid var(--bot-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--text);
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* === STREAM FOOTER (Cost/Time) === */
.stream-footer {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-tertiary);
  padding: 3px 4px;
  opacity: 0.7;
  letter-spacing: 0.01em;
}

/* === SKILLS TRAY === */
.skills-tray {
  display: flex;
  gap: 6px;
  padding: 0 12px;
  overflow-x: auto;
  scrollbar-width: none;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.3s var(--ease-out), opacity 0.2s var(--ease-out), padding 0.3s var(--ease-out);
}

.skills-tray::-webkit-scrollbar { display: none; }

.skills-tray.open {
  max-height: 44px;
  opacity: 1;
  padding: 8px 12px;
}

.skill-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-tertiary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.15s var(--ease-out);
}

.skill-chip:hover {
  color: var(--gold);
  border-color: var(--gold-dim);
  background: var(--gold-glow);
}

.skill-chip:active {
  transform: scale(0.96);
}

.skill-chip svg {
  color: inherit;
  flex-shrink: 0;
}

.skills-toggle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s var(--ease-out);
}

.skills-toggle:hover { color: var(--text-secondary); }
.skills-toggle.active { color: var(--gold); }

/* === FOOTER / INPUT === */
footer {
  padding: 0 12px 0;
  padding-bottom: max(10px, env(safe-area-inset-bottom));
  background: var(--bg);
  border-top: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.input-wrap {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 4px 4px 4px 4px;
  margin-top: 8px;
  transition: border-color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}

.input-wrap:focus-within {
  border-color: var(--gold-dim);
  box-shadow: 0 0 0 1px var(--gold-glow), 0 2px 12px var(--gold-glow);
}

#input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.4;
  resize: none;
  outline: none;
  max-height: 120px;
  padding: 8px 0;
  caret-color: var(--gold);
}

#input::placeholder { color: var(--text-tertiary); }

#send-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--gold);
  color: var(--bg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s var(--ease-out);
}

#send-btn:hover { background: var(--gold-bright); transform: scale(1.05); }
#send-btn:active { transform: scale(0.95); }
#send-btn:disabled { opacity: 0.3; cursor: not-allowed; transform: none; }

/* === SCROLLBAR === */
main#messages::-webkit-scrollbar { width: 3px; }
main#messages::-webkit-scrollbar-track { background: transparent; }
main#messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
main#messages::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* === ANIMATIONS === */
@keyframes msgIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes welcomeFade {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}

@keyframes toolSlideIn {
  from { opacity: 0; transform: translateX(-8px); }
  to { opacity: 1; transform: translateX(0); }
}

/* === RESPONSIVE === */

/* Desktop: wider, more breathing room */
@media (min-width: 768px) {
  #app { max-width: 860px; }

  main#messages { padding: 24px 20px; gap: 8px; }

  .message { max-width: 72%; padding: 12px 16px; }

  .stream-container { max-width: 85%; }

  footer { padding: 10px 16px; padding-bottom: 14px; }

  .input-wrap { border-radius: 24px; padding: 6px 6px 6px 20px; }

  #input { font-size: 15px; }

  #send-btn { width: 40px; height: 40px; }
}

/* Small phones */
@media (max-width: 380px) {
  header { padding: 8px 12px; }

  .brand-mark { font-size: 20px; }

  main#messages { padding: 12px 10px; }

  .message { max-width: 90%; font-size: 14px; padding: 8px 12px; }

  .stream-container { max-width: 96%; }

  .stream-tool { font-size: 11px; }

  footer { padding: 6px 8px; }

  .input-wrap { padding: 3px 3px 3px 12px; border-radius: 16px; }

  #input { font-size: 14px; }

  #send-btn { width: 34px; height: 34px; }
}

/* Tall phones: extra bottom padding */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  footer {
    padding-bottom: max(10px, calc(env(safe-area-inset-bottom) + 4px));
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.05ms !important;
  }
}

/* Landscape phone: compact header */
@media (max-height: 500px) and (orientation: landscape) {
  header { padding: 6px 12px; }
  .brand-mark { font-size: 18px; }
  main#messages { padding: 8px 12px; }
}