/* ---------- Layout ---------- */
:root {
  --chat-bg: #0b1020;
  --chat-bg-2: #111733;
  --chat-fg: #e6e9f5;
  --chat-fg-dim: #8a93b2;
  --chat-accent: #06b6d4;
  --chat-accent-2: #8b5cf6;
  --chat-bubble-user: linear-gradient(135deg, #06b6d4, #8b5cf6);
  --chat-bubble-asst: rgba(255, 255, 255, 0.06);
  --chat-bubble-tool: rgba(255, 255, 255, 0.04);
  --chat-border: rgba(255, 255, 255, 0.1);
  --chat-error: #ef4444;
  --chat-success: #10b981;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--chat-bg);
  color: var(--chat-fg);
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

body {
  background: radial-gradient(ellipse at top, var(--chat-bg-2), var(--chat-bg) 70%);
}

.chat-app {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: 100vh;
  max-width: 880px;
  margin: 0 auto;
}

/* ---------- Header ---------- */
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--chat-border);
  background: rgba(11, 16, 32, 0.85);
  backdrop-filter: blur(8px);
}

.chat-title {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.chat-emoji {
  font-size: 26px;
  filter: drop-shadow(0 0 8px rgba(6, 182, 212, 0.5));
}

.chat-title-text h1 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.chat-title-text p {
  margin: 0;
  font-size: 12px;
  color: var(--chat-fg-dim);
}

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

.chat-btn-ghost {
  background: transparent;
  color: var(--chat-fg);
  border: 1px solid var(--chat-border);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
  transition: background 120ms ease;
}

.chat-btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}

.chat-btn-ghost:disabled {
  opacity: 0.55;
  cursor: progress;
}

/* Dev hot-reload button — subdued so it reads as a utility, not a primary action. */
.chat-btn-reload {
  opacity: 0.7;
  font-size: 12px;
  padding: 5px 10px;
}

.chat-btn-reload:hover {
  opacity: 1;
}

/* ---------- WebGPU gate ---------- */
.chat-unsupported {
  margin: 14px 18px 0;
  padding: 12px 14px;
  border: 1px solid rgba(245, 158, 11, 0.5);
  background: rgba(245, 158, 11, 0.08);
  color: var(--chat-fg);
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.5;
}

.chat-unsupported strong {
  display: block;
  margin-bottom: 4px;
  color: #f59e0b;
}

.chat-unsupported-detail {
  margin: 8px 0 0;
  padding: 8px 10px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 6px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.92);
}

.chat-unsupported-env {
  margin: 6px 0 0;
  padding: 4px 8px;
  background: rgba(0, 0, 0, 0.18);
  border-radius: 4px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 11px;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.65);
  word-break: break-all;
}

.chat-unsupported-hint {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
}

.chat-unsupported-hint code {
  background: rgba(255, 255, 255, 0.08);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 11px;
}

/* ---------- Scroll / messages ---------- */
.chat-scroll {
  overflow-y: auto;
  padding: 24px 18px 12px;
  scroll-behavior: smooth;
}

.chat-scroll:focus {
  outline: none;
}

.chat-empty {
  max-width: 540px;
  margin: 40px auto;
  text-align: center;
  color: var(--chat-fg-dim);
}

/* ---------- Install CTA ---------- */
.chat-install {
  background:
    radial-gradient(ellipse at top, rgba(6, 182, 212, 0.12), transparent 70%),
    rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: 16px;
  padding: 28px 24px 22px;
  text-align: center;
}

.chat-install-emoji {
  display: block;
  font-size: 40px;
  margin-bottom: 4px;
  filter: drop-shadow(0 0 16px rgba(6, 182, 212, 0.45));
}

.chat-install-title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 600;
  color: var(--chat-fg);
}

.chat-install-body {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--chat-fg-dim);
}

.chat-install-btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--chat-accent), var(--chat-accent-2));
  color: white;
  border: none;
  border-radius: 10px;
  padding: 12px 22px;
  font: inherit;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.25);
}

.chat-install-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.35);
}

.chat-install-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.chat-install-hint {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--chat-fg-dim);
}

.chat-empty-title {
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--chat-fg);
}

.chat-empty-sub {
  font-size: 13px;
  margin: 0 0 18px;
  color: var(--chat-fg-dim);
  line-height: 1.55;
}

.chat-empty-suggestions {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.chat-empty-suggestions button {
  background: rgba(255, 255, 255, 0.04);
  color: var(--chat-fg);
  border: 1px solid var(--chat-border);
  border-radius: 10px;
  padding: 10px 14px;
  text-align: left;
  cursor: pointer;
  font-size: 13px;
  width: 100%;
  transition: background 120ms ease, border-color 120ms ease;
}

.chat-empty-suggestions button:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(6, 182, 212, 0.4);
}

.chat-messages {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.chat-msg {
  display: flex;
  flex-direction: column;
  max-width: 92%;
}

.chat-msg-user {
  align-self: flex-end;
  align-items: flex-end;
}

.chat-msg-asst,
.chat-msg-tool {
  align-self: flex-start;
  align-items: flex-start;
}

.chat-bubble {
  border-radius: 14px;
  padding: 10px 14px;
  background: var(--chat-bubble-asst);
  border: 1px solid var(--chat-border);
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

.chat-msg-user .chat-bubble {
  background: var(--chat-bubble-user);
  color: white;
  border-color: transparent;
}

.chat-bubble pre {
  background: rgba(0, 0, 0, 0.4);
  border-radius: 8px;
  padding: 10px 12px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.45;
  margin: 8px 0;
}

.chat-bubble code {
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 13px;
}

.chat-bubble :not(pre) > code {
  background: rgba(0, 0, 0, 0.3);
  padding: 1px 6px;
  border-radius: 4px;
}

.chat-bubble p {
  margin: 0 0 8px;
}

.chat-bubble p:last-child {
  margin-bottom: 0;
}

.chat-bubble ul,
.chat-bubble ol {
  margin: 4px 0 8px;
  padding-left: 22px;
}

.chat-bubble a {
  color: var(--chat-accent);
}

.chat-bubble blockquote {
  border-left: 3px solid var(--chat-accent);
  margin: 6px 0;
  padding: 2px 12px;
  color: var(--chat-fg-dim);
}

/* ---------- Tool calls ---------- */
.chat-tool {
  background: var(--chat-bubble-tool);
  border: 1px solid var(--chat-border);
  border-radius: 10px;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--chat-fg-dim);
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  max-width: 92%;
  align-self: flex-start;
}

.chat-tool summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.chat-tool summary::-webkit-details-marker {
  display: none;
}

.chat-tool summary::before {
  content: '▸';
  display: inline-block;
  transition: transform 120ms ease;
  color: var(--chat-fg-dim);
}

.chat-tool[open] summary::before {
  transform: rotate(90deg);
}

.chat-tool-name {
  color: var(--chat-fg);
}

.chat-tool-status {
  margin-left: auto;
  color: var(--chat-fg-dim);
  font-style: italic;
}

.chat-tool-status.is-ok {
  color: var(--chat-success);
}

.chat-tool-status.is-err {
  color: var(--chat-error);
}

.chat-tool-body {
  margin-top: 8px;
  padding: 8px 10px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 6px;
  white-space: pre-wrap;
  overflow-x: auto;
  max-height: 280px;
  overflow-y: auto;
  font-size: 11px;
  color: var(--chat-fg);
}

.chat-cursor {
  display: inline-block;
  width: 7px;
  height: 14px;
  background: var(--chat-accent);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: chat-blink 1s steps(2) infinite;
}

@keyframes chat-blink {
  50% {
    opacity: 0;
  }
}

/* ---------- Composer ---------- */
.chat-composer {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 14px 16px;
  border-top: 1px solid var(--chat-border);
  background: rgba(11, 16, 32, 0.85);
  backdrop-filter: blur(8px);
}

.chat-composer-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  align-items: end;
}

#chat-input {
  resize: none;
  background: rgba(255, 255, 255, 0.05);
  color: var(--chat-fg);
  border: 1px solid var(--chat-border);
  border-radius: 12px;
  padding: 12px 14px;
  font: inherit;
  line-height: 1.5;
  max-height: 200px;
  min-height: 44px;
  outline: none;
  transition: border-color 120ms ease;
}

#chat-input:focus {
  border-color: var(--chat-accent);
}

.chat-attach-btn,
.chat-send,
.chat-stop {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: none;
  color: white;
  font-size: 18px;
  cursor: pointer;
  align-self: end;
}

.chat-attach-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--chat-border);
  color: var(--chat-fg);
  transition: background 120ms ease, border-color 120ms ease;
}

.chat-attach-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(6, 182, 212, 0.4);
}

.chat-send,
.chat-stop {
  background: var(--chat-bubble-user);
}

.chat-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.chat-stop {
  background: var(--chat-error);
}

/* ---------- Composer attachments ---------- */
.chat-attachments {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chat-attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.35);
  border-radius: 999px;
  font-size: 12px;
  color: var(--chat-fg);
  max-width: 360px;
}

.chat-attachment-chip-emoji {
  font-size: 14px;
}

.chat-attachment-chip-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

.chat-attachment-chip-meta {
  color: var(--chat-fg-dim);
}

.chat-attachment-chip-remove {
  background: transparent;
  border: none;
  color: var(--chat-fg-dim);
  cursor: pointer;
  font-size: 14px;
  padding: 0 2px;
  line-height: 1;
}

.chat-attachment-chip-remove:hover {
  color: var(--chat-error);
}

.chat-attachment-chip-loading {
  opacity: 0.65;
}

/* Chips that appear inside a sent user bubble */
.chat-bubble .chat-attachment-chip {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.35);
  color: white;
  margin-bottom: 6px;
}

.chat-bubble .chat-attachment-chip .chat-attachment-chip-meta {
  color: rgba(255, 255, 255, 0.8);
}

/* ---------- Drop overlay ---------- */
/*
 * `:not([hidden])` so the `hidden` HTML attribute actually hides the
 * element — without it, our `display: flex` outranks the UA's
 * `[hidden] { display: none }` rule on specificity and the overlay
 * stays on screen forever.
 */
.chat-drop-overlay:not([hidden]) {
  position: fixed;
  inset: 0;
  z-index: 5000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(6, 182, 212, 0.12);
  backdrop-filter: blur(6px);
  pointer-events: none;
  border: 3px dashed rgba(6, 182, 212, 0.7);
  border-radius: 0;
}

.chat-drop-overlay-inner {
  background: rgba(11, 16, 32, 0.85);
  border: 1px solid rgba(6, 182, 212, 0.5);
  border-radius: 16px;
  padding: 28px 36px;
  text-align: center;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.chat-drop-emoji {
  font-size: 56px;
  line-height: 1;
  margin-bottom: 10px;
  filter: drop-shadow(0 0 12px rgba(6, 182, 212, 0.4));
}

.chat-drop-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--chat-fg);
  margin-bottom: 4px;
}

.chat-drop-sub {
  font-size: 13px;
  color: var(--chat-fg-dim);
}

/* ---------- Empty-state tip ---------- */
.chat-empty-hint {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--chat-fg-dim);
}

/* ---------- Notifications (toast stack) ---------- */
.notify-stack {
  position: fixed;
  bottom: 16px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 9999;
  pointer-events: none;
}

.notify {
  pointer-events: auto;
  padding: 10px 14px;
  border-radius: 10px;
  background: rgba(17, 23, 51, 0.95);
  border: 1px solid var(--chat-border);
  color: var(--chat-fg);
  font-size: 13px;
  max-width: 320px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.notify-success {
  border-color: rgba(16, 185, 129, 0.5);
}

.notify-error {
  border-color: rgba(239, 68, 68, 0.5);
}

.notify-warn {
  border-color: rgba(245, 158, 11, 0.5);
}

.notify-close {
  background: transparent;
  border: none;
  color: var(--chat-fg-dim);
  margin-left: 8px;
  cursor: pointer;
  font-size: 16px;
}

/* ---------- Download dialog ---------- */
.chat-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  z-index: 10000;
}

.chat-modal-box {
  background: var(--chat-bg-2);
  border: 1px solid var(--chat-border);
  border-radius: 12px;
  padding: 22px 26px;
  max-width: 440px;
  width: calc(100% - 32px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
}

.chat-modal-box h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

.chat-modal-box p {
  margin: 0 0 16px;
  color: var(--chat-fg-dim);
  font-size: 14px;
}

.chat-modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.chat-modal-actions button {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--chat-border);
  background: transparent;
  color: var(--chat-fg);
  cursor: pointer;
  font: inherit;
}

.chat-modal-actions .chat-modal-primary {
  background: var(--chat-accent);
  border-color: var(--chat-accent);
  color: white;
}

.chat-modal-progress {
  margin-top: 12px;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.chat-modal-progress-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--chat-accent), var(--chat-accent-2));
  transition: width 120ms ease;
}

.chat-modal-hint {
  margin-top: 12px;
  font-size: 12px;
  color: var(--chat-fg-dim);
}

/* ---------- Small screens ---------- */
@media (max-width: 600px) {
  .chat-header {
    padding: 10px 12px;
  }
  .chat-title {
    padding-left: 100px;
  }
  .chat-title-text h1 {
    font-size: 15px;
  }
  .chat-header-actions {
    gap: 8px;
  }
  .chat-scroll {
    padding: 16px 12px 8px;
  }
  .chat-unsupported {
    margin: 10px 12px 0;
    font-size: 12px;
  }
}