/* Layout: app shell, sidebar, topbar. Struktur desktop-first, override
   mobile/tablet ada di responsive.css supaya breakpoint terpusat di satu
   file (memudahkan audit "apakah tampilan mobile rusak"). */

.app {
  display: flex;
  max-width: var(--app-max-width);
  margin: 0 auto;
  height: 100vh;
  background: var(--color-bg);
  position: relative;
}

/* ---------- Sidebar ---------- */

.sidebar {
  flex-shrink: 0;
  width: var(--sidebar-width);
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  transition: width var(--transition-base), transform var(--transition-base);
  /* BUKAN overflow:hidden -- label teks sudah disembunyikan via display:none
     (instan, tidak ikut animasi lebar) jadi tidak ada risiko teks meluber
     saat transisi. overflow:hidden di sini justru MEMOTONG tooltip
     (position:absolute, muncul di luar batas sidebar saat collapsed) --
     lihat CSS tooltip [data-tooltip] di bawah. */
  overflow: visible;
}

.app[data-sidebar-collapsed="true"] .sidebar {
  width: var(--sidebar-width-collapsed);
}

.sidebar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 14px;
  border-bottom: 1px solid var(--color-border);
  min-height: var(--header-height);
}

.brand-mark {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  overflow: hidden;
  position: relative;
}

.brand-mark img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
}

.brand-text {
  min-width: 0;
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-text strong {
  font-size: 0.86rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-text span {
  font-size: 0.72rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__collapse-btn {
  margin-left: auto;
  flex-shrink: 0;
}

/* PENTING: tombol collapse SENDIRI tidak boleh ikut disembunyikan saat
   collapsed -- kalau ikut hilang, pengguna terjebak tanpa cara membuka
   kembali sidebar lewat UI (bug yang ditemukan saat menguji persistence
   localStorage: status collapsed bertahan setelah reload, tapi tombolnya
   sendiri sempat ikut hilang). Saat collapsed, brand-mark (ikon) dan
   tombol collapse tetap tampil bertumpuk vertikal; hanya teks brand yang
   disembunyikan. */
.app[data-sidebar-collapsed="true"] .brand-text {
  display: none;
}

.app[data-sidebar-collapsed="true"] .sidebar__brand {
  flex-direction: column;
  gap: 8px;
}

.app[data-sidebar-collapsed="true"] .sidebar__collapse-btn {
  margin-left: 0;
}

.btn-new-chat {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 14px;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-soft);
  color: var(--color-text);
  font-size: var(--fs-label);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.btn-new-chat:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.sidebar__scroll {
  flex: 1;
  overflow-y: auto;
  padding-bottom: 8px;
}

.sidebar__section {
  padding: 6px 14px 14px;
}

.sidebar__label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
}

.sidebar__label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: 4px 4px 8px;
}

.sidebar__nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar__nav button,
.sidebar__nav .quick-action-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: var(--fs-label);
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.sidebar__nav button:hover,
.sidebar__nav .quick-action-btn:hover {
  background: var(--color-surface-soft);
  color: var(--color-text);
}

.sidebar__nav button.is-active {
  background: var(--badge-info-bg);
  color: var(--color-primary-dark);
}

.sidebar__nav i {
  flex-shrink: 0;
  width: 18px;
  text-align: center;
  font-size: 0.95rem;
}

.app[data-sidebar-collapsed="true"] .sidebar__label,
.app[data-sidebar-collapsed="true"] .sidebar__nav span,
.app[data-sidebar-collapsed="true"] .sidebar__hint,
.app[data-sidebar-collapsed="true"] .btn-new-chat span,
.app[data-sidebar-collapsed="true"] .theme-toggle span,
.app[data-sidebar-collapsed="true"] .sidebar__meta {
  display: none;
}

/* Tooltip ringkas saat sidebar diciutkan (ikon-saja).
   CATATAN: SEBELUMNYA dicoba murni CSS (::after + position:absolute), tapi
   ternyata tetap terpotong oleh .sidebar__scroll -- overflow-y:auto pada
   elemen itu MEMAKSA overflow-x ikut ter-resolve jadi "auto" (bukan
   "visible") menurut spesifikasi CSS Overflow, walau ditulis eksplisit.
   Jadi tooltip dipindah jadi satu elemen mengambang (#sidebar-tooltip,
   anak langsung <body>) yang posisinya dihitung lewat JS
   (getBoundingClientRect) di ui.js -- lihat showSidebarTooltip(). */
.sidebar-tooltip {
  position: fixed;
  z-index: 300;
  padding: 5px 10px;
  background: var(--color-text);
  color: var(--color-bg);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  box-shadow: var(--shadow-card);
  pointer-events: none;
}

.sidebar-tooltip[hidden] { display: none; }

.sidebar__history {
  padding: 0 14px 14px;
}

.history-search {
  width: 100%;
  margin-bottom: 8px;
  padding: 7px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.78rem;
  font-family: inherit;
}

.history-search:focus {
  outline: none;
  border-color: var(--color-primary);
}

.history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 220px;
  overflow-y: auto;
}

.history-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.history-item button.history-item__open {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 7px 10px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  text-align: left;
  cursor: pointer;
}

.history-item__title {
  color: var(--color-text);
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.history-item__meta {
  color: var(--color-text-muted);
  font-size: 0.68rem;
}

.history-item button.history-item__open:hover {
  background: var(--color-surface-soft);
  color: var(--color-text);
}

.history-item__delete {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.75rem;
}

.history-item__delete:hover {
  background: var(--badge-danger-bg);
  color: var(--color-danger);
}

.sidebar__hint {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  padding: 4px;
  margin: 6px 0 0;
  line-height: 1.4;
}

.sidebar__empty {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  padding: 6px 4px;
}

.sidebar__footer {
  border-top: 1px solid var(--color-border);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-soft);
  color: var(--color-text);
  font-size: var(--fs-label);
  font-weight: 500;
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--color-primary);
}

.sidebar__meta {
  display: flex;
  flex-direction: column;
  gap: 1px;
  font-size: 0.68rem;
  color: var(--color-text-muted);
  padding: 0 2px;
}

.sidebar-overlay {
  display: none;
}

/* ---------- Topbar ---------- */

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.topbar {
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: var(--header-height);
  padding: 10px 20px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.topbar__menu-btn {
  display: none;
}

.topbar__identity {
  min-width: 0;
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.topbar__identity h1 {
  margin: 0;
  font-size: var(--fs-app-title);
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar__title-short { display: none; }

.topbar__identity p {
  margin: 0;
  font-size: var(--fs-subtitle);
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar__status {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 8px;
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  background: var(--badge-success-bg);
  color: var(--badge-success-text);
  font-size: var(--fs-meta);
  font-weight: 600;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.18);
}

.topbar__actions {
  flex-shrink: 0;
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}

.icon-btn {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 1rem;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.icon-btn:hover {
  background: var(--color-surface-soft);
  color: var(--color-text);
}

.debug-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  font-size: 0.76rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  white-space: nowrap;
}

.debug-toggle input {
  accent-color: var(--color-primary);
  width: 15px;
  height: 15px;
}

/* ---------- Prototype notice ---------- */

.prototype-notice {
  flex-shrink: 0;
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 10px 20px 0;
  padding: 7px 12px;
  background: var(--badge-warning-bg);
  color: var(--badge-warning-text);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  line-height: 1.4;
}

.prototype-notice[hidden] { display: none; }
.prototype-notice i { flex-shrink: 0; font-size: 0.9rem; }
.prototype-notice p { margin: 0; flex: 1; }
.prototype-notice strong { font-weight: 700; }

.prototype-notice__close {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: inherit;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  border-radius: var(--radius-sm);
  opacity: 0.7;
}

.prototype-notice__close:hover { opacity: 1; background: rgba(0, 0, 0, 0.06); }