/* Layout principal: sidebar + main + (opcional) panel de artefacto */

.app {
  display: grid;
  grid-template-columns: 280px 1fr 0;
  transition: grid-template-columns 200ms ease;
  height: calc(100vh - 4px);
  min-height: 0;
  background: var(--bg);
}

.app.artifact-open,
body.artifact-open .app {
  grid-template-columns: 280px 1fr min(40vw, 720px);
}

/* -------------------------------------------------------------------------- */
/* Sidebar                                                                     */
/* -------------------------------------------------------------------------- */
.sidebar {
  background: var(--bg-sunken);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
  position: relative;
  z-index: 2;
}
:root[data-theme="dark"] .sidebar { background: #1F1F1F; }

.sidebar-header {
  padding: 18px 18px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--fg);
  border-bottom: 1px solid var(--border);
}
.sidebar-header .dot {
  width: 14px;
  height: 14px;
  background: linear-gradient(
    135deg,
    var(--pastel-green) 0%,
    var(--pastel-blue) 50%,
    var(--pastel-coral) 100%
  );
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.sidebar-actions { padding: 14px 14px 8px; }
.new-chat-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1.5px solid var(--accent);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--accent-strong);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  transition: background var(--transition), color var(--transition);
}
.new-chat-btn:hover {
  background: var(--accent);
  color: var(--white);
}

.sidebar-search {
  padding: 0 14px 12px;
}
.sidebar-search input {
  width: 100%;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  transition: border-color var(--transition);
}
.sidebar-search input:focus { outline: none; border-color: var(--accent); }

.sidebar-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 10px 12px;
}

.sidebar-group { margin-top: 14px; }
.sidebar-group-title {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  padding: 6px 8px 4px;
}

.conv-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid transparent;
  border-left: 2px solid transparent;
  border-radius: 0;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--fg);
  cursor: pointer;
  position: relative;
  user-select: none;
  transition: background var(--transition), border-color var(--transition);
}
.conv-item:hover {
  background: var(--bg-elev);
  border-left-color: var(--pastel-blue);
}
.conv-item.active {
  background: var(--bg-elev);
  border-color: var(--border);
  border-left-color: var(--pastel-blue);
}
.conv-item .title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.conv-item .pin {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--pastel-coral);
}
.conv-item .ctx-trigger {
  opacity: 0;
  transition: opacity 150ms;
  padding: 2px 6px;
  border-radius: 0;
  font-size: 16px;
  color: var(--fg-muted);
}
.conv-item:hover .ctx-trigger { opacity: 1; }
.conv-item .ctx-trigger:hover { background: var(--bg-sunken); }

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
  flex: 1;
  min-width: 0;
}
.user-chip .avatar {
  width: 28px;
  height: 28px;
  background: linear-gradient(
    135deg,
    var(--pastel-green) 0%,
    var(--pastel-blue) 50%,
    var(--pastel-coral) 100%
  );
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.625rem;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0;
}
.user-chip .email {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.icon-btn {
  width: 32px;
  height: 32px;
  border-radius: 0;
  display: grid;
  place-items: center;
  color: var(--fg-muted);
  background: transparent;
  transition: background var(--transition), color var(--transition);
}
.icon-btn:hover { background: var(--bg-elev); color: var(--fg); }
.icon-btn [data-lucide] { width: 1rem; height: 1rem; }

/* -------------------------------------------------------------------------- */
/* Main + topbar                                                               */
/* -------------------------------------------------------------------------- */
.main {
  display: flex;
  flex-direction: column;
  min-height: 0;
  position: relative;
}

.topbar {
  height: 56px;
  padding: 0 22px;
  display: flex;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.topbar .hamburger { display: none; }
.topbar .conv-title {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.9375rem;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--fg);
}

.mode-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1.5px solid var(--accent-normal);
  border-radius: 0;
  background: transparent;
  color: var(--accent-normal-strong);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.mode-badge .glyph {
  width: 8px;
  height: 8px;
  background: currentColor;
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  font-size: 0;
  line-height: 0;
}
.mode-badge:hover { background: var(--accent-normal-soft); }
.mode-badge[data-mode="professional"] {
  border-color: var(--accent-pro);
  color: var(--accent-pro-strong);
}
.mode-badge[data-mode="professional"]:hover {
  background: var(--accent-pro-soft);
}

/* -------------------------------------------------------------------------- */
/* Sidebar overlay (mobile)                                                    */
/* -------------------------------------------------------------------------- */
.sidebar-overlay { display: none; }

@media (max-width: 768px) {
  .app { grid-template-columns: 1fr; }
  body.artifact-open .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    top: 4px;
    left: 0;
    bottom: 0;
    width: 86%;
    max-width: 320px;
    transform: translateX(-100%);
    transition: transform 200ms ease;
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-md);
  }
  .topbar .hamburger { display: grid; }
  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 4px 0 0 0;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: opacity 200ms;
    z-index: 1;
  }
  .sidebar-overlay.open { opacity: 1; pointer-events: auto; }
}