:root {
  --bg: #f3f5f8;
  --bg-2: #edf1f5;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: rgba(255, 255, 255, 0.94);
  --surface-soft: rgba(255, 255, 255, 0.68);
  --text: #121722;
  --muted: #667085;
  --line: rgba(18, 23, 34, 0.09);
  --line-strong: rgba(18, 23, 34, 0.14);
  --accent: #111827;
  --accent-soft: #eef2f6;
  --assistant: #ffffff;
  --user: #111827;
  --warning-bg: rgba(255, 241, 214, 0.82);
  --warning-line: rgba(180, 118, 30, 0.16);
  --warning-text: #8a5a12;
  --shadow-lg: 0 24px 70px rgba(15, 23, 42, 0.10);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.08);
  --shadow-sm: 0 8px 18px rgba(15, 23, 42, 0.06);
  --app-edge: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100dvh;
  overflow: hidden;
  color: var(--text);
  font-family: "Aptos", "Segoe UI", system-ui, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.95), transparent 30%),
    radial-gradient(circle at 85% 15%, rgba(219, 228, 239, 0.75), transparent 24%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}

.app {
  width: min(1240px, calc(100% - (var(--app-edge) * 2)));
  margin: 0 auto;
  height: 100dvh;
  padding: 16px 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 12px;
}

.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 0;
  padding: 4px 2px 0;
}

.hero-copy {
  max-width: none;
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1;
  letter-spacing: -0.04em;
}

.workspace {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
  min-height: 0;
  transition: grid-template-columns 180ms ease, gap 180ms ease;
}

.sidebar {
  display: grid;
  align-content: start;
  gap: 14px;
  min-height: 0;
  transition: opacity 160ms ease, transform 160ms ease;
}

.toggle-sidebar-btn {
  flex-shrink: 0;
}

body.sidebar-collapsed .workspace {
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

body.sidebar-collapsed .sidebar {
  display: none;
}

.status-card,
.panel,
.chat-shell {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
}

.status-card,
.panel {
  padding: 16px;
}

.status-card {
  display: grid;
  gap: 12px;
}

.status-item {
  display: grid;
  gap: 4px;
}

.status-item strong,
.panel-title,
.chat-kicker,
.message-role,
.label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-item strong,
.panel-title,
.chat-kicker,
.label {
  color: var(--muted);
}

.panel {
  background: var(--surface-soft);
}

.panel-title {
  margin: 0 0 10px;
}

.panel-copy {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.sidebar-actions {
  display: grid;
  gap: 10px;
}

.chat-shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  min-height: 0;
  height: 100%;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.chat-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.68);
}

.chat-kicker {
  margin: 0 0 6px;
}

.chat-topbar h2 {
  margin: 0;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.speech-status {
  min-height: 18px;
  text-align: right;
  color: var(--muted);
  font-size: 13px;
}

.messages {
  overflow: auto;
  min-height: 0;
  padding: 22px;
  display: grid;
  align-content: start;
  gap: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.20) 0%, rgba(255, 255, 255, 0) 14%),
    transparent;
  overscroll-behavior: contain;
}

.messages:empty::before {
  content: "Haz una pregunta, arrastra una idea, pega un texto o prueba con voz.";
  display: block;
  margin: 20px auto 0;
  max-width: 380px;
  padding: 18px 20px;
  border: 1px dashed var(--line-strong);
  border-radius: 22px;
  color: var(--muted);
  text-align: center;
  line-height: 1.5;
  background: rgba(255, 255, 255, 0.60);
}

.message {
  max-width: min(80%, 780px);
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--assistant);
  box-shadow: var(--shadow-sm);
  animation: rise-in 220ms ease-out;
}

.message.user {
  justify-self: end;
  color: #fff;
  background: var(--user);
  border-color: rgba(255, 255, 255, 0.06);
}

.message.assistant {
  justify-self: start;
}

.message-role {
  margin: 0 0 8px;
  color: inherit;
  opacity: 0.58;
}

.message-content {
  line-height: 1.6;
  word-break: break-word;
}

.message-content > :first-child {
  margin-top: 0;
}

.message-content > :last-child {
  margin-bottom: 0;
}

.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
  margin: 0 0 10px;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.message-content h1 { font-size: 1.55rem; }
.message-content h2 { font-size: 1.35rem; }
.message-content h3 { font-size: 1.18rem; }

.message-content p,
.message-content ul,
.message-content ol,
.message-content blockquote,
.message-content pre,
.message-content .table-wrap {
  margin: 0 0 12px;
}

.message-content ul,
.message-content ol {
  padding-left: 20px;
}

.message-content li + li {
  margin-top: 6px;
}

.message-content blockquote {
  padding: 10px 14px;
  border-left: 3px solid rgba(102, 112, 133, 0.35);
  background: rgba(102, 112, 133, 0.08);
  border-radius: 12px;
}

.message.user .message-content blockquote {
  border-left-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.08);
}

.message-content code {
  padding: 2px 6px;
  border-radius: 8px;
  background: rgba(17, 24, 39, 0.08);
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.92em;
}

.message.user .message-content code {
  background: rgba(255, 255, 255, 0.12);
}

.message-content pre {
  overflow: auto;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #0f172a;
  color: #e5edf8;
}

.message-content pre code {
  padding: 0;
  background: transparent;
  color: inherit;
  font-size: 0.94em;
}

.message-content a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.message-content strong {
  font-weight: 700;
}

.message-content em {
  font-style: italic;
}

.message-content .table-wrap {
  overflow-x: auto;
}

.message-content table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.message-content th,
.message-content td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.message-content th {
  background: rgba(17, 24, 39, 0.06);
  font-weight: 700;
}

.message.user .message-content th,
.message.user .message-content td {
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

.message.user .message-content th {
  background: rgba(255, 255, 255, 0.08);
}

.message-images,
.image-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.message-images {
  margin-top: 12px;
}

.message-sources {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.message.user .message-sources {
  border-top-color: rgba(255, 255, 255, 0.12);
}

.message-sources-title {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.message-sources-list {
  display: grid;
  gap: 8px;
}

.source-group {
  display: grid;
  gap: 0.35rem;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(17, 24, 39, 0.03);
}

.source-group-title {
  font-size: 0.9rem;
  line-height: 1.35;
}

.source-group-meta {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.35;
}

.source-fragments {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.15rem;
}

.source-fragment-chip {
  min-width: 0;
  min-height: 0;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--text);
  box-shadow: none;
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.2;
}

.source-fragment-chip:hover {
  background: #fff;
}

.message.user .source-group {
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.08);
}

.message.user .source-group-meta,
.message.user .message-sources-title {
  color: rgba(255, 255, 255, 0.72);
}

.message.user .source-fragment-chip {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.message-images img,
.preview-chip img {
  display: block;
  max-width: 160px;
  max-height: 120px;
  border-radius: 16px;
  border: 1px solid var(--line);
}

.composer {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-top: 1px solid var(--line);
  background: var(--surface-strong);
  flex-shrink: 0;
  align-content: start;
  min-width: 0;
}

textarea {
  width: 100%;
  min-height: 3.25rem;
  max-height: 18vh;
  resize: none;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.98);
  color: var(--text);
  font: inherit;
  line-height: 1.6;
  outline: none;
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

textarea:focus {
  border-color: rgba(17, 24, 39, 0.22);
  box-shadow: 0 0 0 4px rgba(17, 24, 39, 0.06);
}

.composer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-shrink: 0;
}

.toolbar,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

button,
.file-button span {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 11px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    opacity 180ms ease;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.icon-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3.25rem;
  min-height: 3.25rem;
  padding: 0.75rem;
}

.btn-icon {
  width: 1.25rem;
  height: 1.25rem;
  display: block;
  flex: 0 0 auto;
}

.secondary .btn-icon {
  opacity: 0.86;
}

#send-btn .btn-icon {
  filter: brightness(0) invert(1);
}

button:hover,
.file-button span:hover {
  transform: translateY(-1px);
}

button:active,
.file-button span:active {
  transform: translateY(0);
}

button {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 10px 20px rgba(17, 24, 39, 0.16);
}

button.secondary,
.file-button span {
  color: var(--text);
  background: var(--accent-soft);
  border-color: var(--line);
  box-shadow: none;
}

button.secondary.is-active,
.composer.is-busy button[type="submit"] {
  color: #fff;
  background: var(--accent);
  border-color: transparent;
  box-shadow: 0 10px 20px rgba(17, 24, 39, 0.16);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.file-button input {
  display: none;
}

.file-button {
  display: flex;
}

.preview-chip {
  display: grid;
  gap: 6px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
}

.preview-chip small {
  color: var(--muted);
  font-size: 13px;
}

.context-warning {
  padding: 12px 14px;
  border: 1px solid var(--warning-line);
  border-radius: 16px;
  background: var(--warning-bg);
  color: var(--warning-text);
  line-height: 1.45;
  animation: rise-in 180ms ease-out;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media (max-width: 980px) {
  .workspace {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .sidebar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .chat-shell {
    min-height: 0;
  }
}

@media (max-width: 760px) {
  :root {
    --app-edge: 0.625rem;
  }

  body {
    background:
      radial-gradient(circle at top left, rgba(255, 255, 255, 0.92), transparent 24%),
      linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  }

  .app {
    width: min(100%, calc(100% - (var(--app-edge) * 2)));
    padding: 0.5rem 0;
    gap: 0.5rem;
  }

  .sidebar {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    gap: 0.25rem;
    flex-wrap: nowrap;
    flex-direction: column;
    align-items: flex-start;
    min-width: 0;
  }

  .hero {
    align-items: center;
    flex-direction: row;
    gap: 0.5rem;
    padding: 0 0.125rem;
  }

  h1 {
    max-width: 12rem;
    font-size: 0.95rem;
    line-height: 1.05;
    letter-spacing: -0.03em;
  }

  .eyebrow {
    font-size: 0.55rem;
    letter-spacing: 0.1em;
  }

  .toggle-sidebar-btn {
    margin-left: auto;
    min-height: 2.5rem;
    min-width: 2.5rem;
    padding: 0.5rem;
  }

  .status-card,
  .panel,
  .chat-shell,
  .message,
  textarea {
    border-radius: 1rem;
  }

  .chat-shell {
    min-height: 0;
    grid-template-rows: auto minmax(0, 1fr) auto;
  }

  .chat-topbar {
    align-items: center;
    flex-direction: row;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.75rem 0.875rem;
  }

  .speech-status {
    text-align: left;
    font-size: 0.7rem;
    max-width: 7.5rem;
  }

  .messages {
    padding: 0.875rem;
    gap: 0.75rem;
  }

  .message {
    max-width: 100%;
    padding: 0.75rem 0.8125rem;
  }

  .chat-kicker {
    margin: 0 0 0.2rem;
  }

  .chat-topbar h2 {
    font-size: 0.98rem;
  }

  .source-group {
    padding: 0.5rem 0.625rem;
  }

  .source-fragment-chip {
    padding: 0.3rem 0.55rem;
    font-size: 0.72rem;
  }

  .composer {
    gap: 0.5rem;
    padding: 0.75rem;
  }

  textarea {
    min-height: 2.5rem;
    max-height: 5rem;
    padding: 0.75rem 0.875rem;
    font-size: 0.92rem;
    line-height: 1.45;
  }

  .composer-footer {
    align-items: center;
    flex-direction: row;
    justify-content: space-between;
    gap: 0.5rem;
  }

  .toolbar,
  .sidebar-actions,
  .file-button {
    width: auto;
  }

  .toolbar {
    display: flex;
    flex: 0 0 auto;
    gap: 0.5rem;
  }

  .actions {
    display: flex;
    flex: 1 1 auto;
    justify-content: flex-end;
  }

  .toolbar > *,
  .sidebar-actions > *,
  .toolbar .file-button {
    flex: 0 0 auto;
  }

  .toolbar .icon-button,
  .toolbar .file-button,
  .toolbar .file-button span,
  .actions .icon-button {
    width: auto;
  }

  .icon-button {
    min-width: 0;
    min-height: 2.75rem;
    padding: 0.625rem;
  }

  .btn-icon {
    width: 1.125rem;
    height: 1.125rem;
  }

  #send-btn {
    min-width: 4.25rem;
    min-height: 2.75rem;
    padding-inline: 1rem;
  }

  .label {
    display: none;
  }

  .messages:empty::before {
    margin-top: 0.5rem;
    max-width: 100%;
    padding: 0.875rem;
    font-size: 0.95rem;
  }
}

@media (max-width: 420px) {
  :root {
    --app-edge: 0.5rem;
  }

  .app {
    padding: 0.375rem 0;
    gap: 0.375rem;
  }

  .workspace {
    gap: 0.375rem;
  }

  h1 {
    max-width: 10.5rem;
    font-size: 0.88rem;
  }

  .chat-topbar h2 {
    font-size: 0.92rem;
  }

  .status-card,
  .panel {
    padding: 0.875rem;
  }

  .panel-copy,
  .message-content,
  textarea {
    font-size: 0.92rem;
  }

  .composer {
    padding: 0.625rem;
  }

  .toolbar {
    gap: 0.375rem;
  }

  .chat-topbar {
    padding: 0.625rem 0.75rem;
  }

  #send-btn {
    min-width: 3.75rem;
  }
}