/* ============================================
   SHARED COMPONENTS — DevDash Generated
   AI coder: Mọi UI element PHẢI dùng class từ file này.
   Cần class mới → THÊM VÀO ĐÂY, không viết CSS riêng cho trang.
   ============================================ */

/* ---- Reset cơ bản ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background: var(--color-bg);
}

/* ---- Layout (mobile-first) ---- */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-md); }
@media (min-width: 768px) { .container { padding: 0 var(--space-lg); } }
.page { padding: var(--space-lg) 0; }
@media (min-width: 768px) { .page { padding: var(--space-xl) 0; } }
.page-header { margin-bottom: var(--space-xl); }
.page-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}
.page-subtitle { font-size: var(--font-size-base); color: var(--color-text-secondary); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* Grid mobile-first: mặc định 1 cột (màn nhỏ) → nâng cột ở breakpoint lớn */
.grid { display: grid; gap: var(--space-md); }
.grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-tight);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: var(--space-xs) var(--space-sm); font-size: var(--font-size-xs); }
.btn-lg { padding: var(--space-md) var(--space-lg); font-size: var(--font-size-base); }

.btn-primary { background: var(--color-primary); color: var(--color-text-inverse); }
.btn-primary:hover:not(:disabled) { background: var(--color-primary-hover); }

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg-secondary);
  border-color: var(--color-border-hover);
}

.btn-danger { background: var(--color-danger); color: var(--color-text-inverse); }
.btn-danger:hover:not(:disabled) { background: #b91c1c; }

.btn-ghost { background: transparent; color: var(--color-text-secondary); }
.btn-ghost:hover:not(:disabled) { background: var(--color-bg-secondary); color: var(--color-text); }

/* ---- Cards ---- */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.card-header {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  font-weight: var(--font-weight-semibold);
}
.card-body { padding: var(--space-lg); }
.card-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

/* ---- Forms ---- */
.form-group { margin-bottom: var(--space-md); }
.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}
.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}
.form-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}
.form-input::placeholder { color: var(--color-text-tertiary); }
.form-input-error { border-color: var(--color-danger); }
.form-error { font-size: var(--font-size-xs); color: var(--color-danger); margin-top: var(--space-xs); }
.form-hint { font-size: var(--font-size-xs); color: var(--color-text-tertiary); margin-top: var(--space-xs); }

.form-select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.form-textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  resize: vertical;
  min-height: 100px;
}

.form-checkbox-group { display: flex; align-items: center; gap: var(--space-sm); }
.form-checkbox { width: 16px; height: 16px; cursor: pointer; }

.form-row { display: flex; gap: var(--space-md); }
.form-row > .form-group { flex: 1; }

.form-actions { display: flex; gap: var(--space-sm); justify-content: flex-end; margin-top: var(--space-lg); }

/* ---- Tables ---- */
.table-wrapper { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-lg); }
.table { width: 100%; border-collapse: collapse; }
.table th {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}
.table td {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  border-bottom: 1px solid var(--color-border);
}
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: var(--color-bg-secondary); }
.table-empty { padding: var(--space-2xl); text-align: center; color: var(--color-text-tertiary); }

/* ---- Alerts ---- */
.alert {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}
.alert-success { background: var(--color-success-light); color: #166534; border: 1px solid #bbf7d0; }
.alert-danger  { background: var(--color-danger-light);  color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: var(--color-warning-light); color: #92400e; border: 1px solid #fde68a; }
.alert-info    { background: var(--color-info-light);    color: #155e75; border: 1px solid #a5f3fc; }

/* ---- Badges ---- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
}
.badge-primary   { background: var(--color-primary-light); color: var(--color-primary); }
.badge-success   { background: var(--color-success-light); color: var(--color-success); }
.badge-danger    { background: var(--color-danger-light);  color: var(--color-danger); }
.badge-warning   { background: var(--color-warning-light); color: var(--color-warning); }
.badge-secondary { background: var(--color-bg-tertiary);   color: var(--color-text-secondary); }

/* ---- Modal ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-sm { max-width: 400px; }
.modal-lg { max-width: 700px; }
.modal-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-title { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); }
.modal-close { background: none; border: none; font-size: var(--font-size-xl); color: var(--color-text-tertiary); cursor: pointer; }
.modal-close:hover { color: var(--color-text); }
.modal-body { padding: var(--space-lg); }
.modal-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
}

/* ---- Pagination ---- */
.pagination { display: flex; align-items: center; gap: var(--space-xs); }
.pagination-btn {
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  cursor: pointer;
}
.pagination-btn:hover { background: var(--color-bg-secondary); }
.pagination-btn.active { background: var(--color-primary); color: var(--color-text-inverse); border-color: var(--color-primary); }
.pagination-info { font-size: var(--font-size-sm); color: var(--color-text-secondary); }

/* ---- Loading ---- */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl);
  color: var(--color-text-secondary);
  gap: var(--space-sm);
}

/* ---- Utility ---- */
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.text-lg { font-size: var(--font-size-lg); }
.text-secondary { color: var(--color-text-secondary); }
.text-success   { color: var(--color-success); }
.text-danger    { color: var(--color-danger); }
.text-center { text-align: center; }
.text-right  { text-align: right; }
.font-medium   { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold     { font-weight: var(--font-weight-bold); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.hidden  { display: none; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.truncate  { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.break-word { word-break: break-word; }
.w-full { width: 100%; }
.flex-1 { flex: 1; }
.relative { position: relative; }

/* ============================================
   MOBILE-FIRST APP SHELL  (HANDOFF §9)
   Base = màn nhỏ ~360px → @media nâng lên tablet/desktop.
   ============================================ */

/* App shell: vùng nội dung chừa chỗ cho bottom-nav (mobile) */
.app-shell { min-height: 100vh; background: var(--color-bg-secondary); }
.app-main { padding-bottom: calc(var(--bottom-nav-height) + var(--space-lg)); }

/* ---- Top app bar (sticky) ---- */
.app-bar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-sm);
  min-height: var(--header-height);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.app-bar-titlewrap { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
.app-bar-title { font-size: var(--font-size-lg); font-weight: var(--font-weight-bold); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.app-bar-sub { font-size: var(--font-size-xs); color: var(--color-text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.app-bar .flex { min-width: 0; flex: 1; }
.app-bar-actions { display: flex; align-items: center; gap: var(--space-sm); }
.app-bar-back {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: var(--touch-min); min-height: var(--touch-min);
  background: none; border: none; cursor: pointer;
  color: var(--color-text); font-size: var(--font-size-xl);
}

/* ---- Bottom tab bar (A008) — nav chính trên mobile ---- */
.bottom-nav {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  display: flex;
  height: var(--bottom-nav-height);
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -1px 4px rgba(0,0,0,0.04);
}
.bottom-nav-item {
  flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px;
  min-height: var(--touch-min);
  padding: var(--space-xs);
  background: none; border: none; cursor: pointer; text-decoration: none;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs); font-weight: var(--font-weight-medium);
  position: relative;
  transition: color var(--transition-fast);
}
.bottom-nav-item .nav-icon { font-size: var(--font-size-lg); line-height: 1; }
.bottom-nav-item.active { color: var(--color-primary); }
.bottom-nav-item:hover { color: var(--color-primary-hover); }
.bottom-nav-badge {
  position: absolute; top: 6px; left: 50%; margin-left: 4px;
  min-width: 16px; height: 16px; padding: 0 4px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 10px; font-weight: var(--font-weight-bold); line-height: 1;
  color: var(--color-text-inverse); background: var(--color-danger);
  border-radius: var(--radius-full);
}

/* Desktop: footer VẪN CỐ ĐỊNH ở đáy (như mobile), chỉ căn giữa + layout ngang */
@media (min-width: 1024px) {
  .bottom-nav { justify-content: center; gap: var(--space-sm); }
  .bottom-nav-item { flex: 0 0 auto; flex-direction: row; gap: var(--space-xs); padding: var(--space-sm) var(--space-md); font-size: var(--font-size-sm); }
  .bottom-nav-badge { position: static; margin-left: var(--space-xs); }
}

/* ---- Status chips (trạng thái) ---- */
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 1px 7px;
  font-size: 0.7rem; font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full); white-space: nowrap;
}
.chip::before { content: ''; width: 5px; height: 5px; border-radius: var(--radius-full); background: currentColor; opacity: 0.9; }
.chip-active, .chip-approved, .chip-done { background: var(--color-success-light); color: var(--color-success); }
.chip-paused, .chip-pending, .chip-queued { background: var(--color-warning-light); color: var(--color-warning); }
.chip-ended, .chip-comment { background: var(--color-bg-tertiary); color: var(--color-text-secondary); }
.chip-blocked, .chip-rejected { background: var(--color-danger-light); color: var(--color-danger); }
.chip-in_progress, .chip-request { background: var(--color-info-light); color: var(--color-info); }

/* ---- List cards (card-stack thay cho bảng trên mobile) ---- */
.list-stack { display: flex; flex-direction: column; gap: var(--space-md); }
.list-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.list-card:hover { border-color: var(--color-border-hover); box-shadow: var(--shadow-md); }
.list-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-sm); margin-bottom: var(--space-xs); }
.list-card-title { font-weight: var(--font-weight-semibold); font-size: var(--font-size-base); }
.list-card-meta { font-size: var(--font-size-xs); color: var(--color-text-tertiary); }

/* ---- Stat cards (overview) — 2 cột trên mobile, 4 cột desktop ---- */
.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); }
@media (min-width: 768px) { .stat-grid { grid-template-columns: repeat(4, 1fr); } }
.stat-card { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); padding: var(--space-sm) var(--space-md); }
.stat-value { font-size: var(--font-size-2xl); font-weight: var(--font-weight-bold); line-height: 1.1; }
@media (min-width: 768px) { .stat-value { font-size: var(--font-size-3xl); } }
.stat-label { font-size: var(--font-size-xs); color: var(--color-text-secondary); margin-top: 2px; }
/* Ô cảnh báo: tô đỏ khi có số > 0 để PM thấy ngay */
.stat-card.is-alert { border-color: var(--color-danger); background: var(--color-danger-light); }
.stat-card.is-alert .stat-value, .stat-card.is-alert .stat-label { color: var(--color-danger); }

/* ---- Timeline (report AI ↔ request PM) ---- */
.timeline { display: flex; flex-direction: column; gap: var(--space-md); }
.timeline-item { display: flex; }
.timeline-bubble {
  max-width: 92%;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}
.timeline-head { display: flex; align-items: center; gap: var(--space-xs); margin-bottom: var(--space-xs); font-size: 0.7rem; }
.timeline-author { font-weight: var(--font-weight-semibold); }
.timeline-time { color: var(--color-text-tertiary); }
.timeline-body { font-size: var(--font-size-sm); line-height: var(--line-height-base); white-space: pre-wrap; word-break: break-word; }
/* AI -> PM : bên trái, nền trắng */
.timeline-item-ai { justify-content: flex-start; }
.timeline-item-ai .timeline-bubble { background: var(--color-bg); border-color: var(--color-border); }
.timeline-item-ai .timeline-author { color: var(--color-info); }
/* PM -> AI : bên phải, nền primary nhạt */
.timeline-item-pm { justify-content: flex-end; }
.timeline-item-pm .timeline-bubble { background: var(--color-primary-light); border-color: #bfdbfe; }
.timeline-item-pm .timeline-author { color: var(--color-primary); }
.timeline-evidence { margin-top: var(--space-sm); padding: var(--space-sm); background: var(--color-bg-secondary); border-radius: var(--radius-md); font-family: var(--font-mono); font-size: var(--font-size-xs); overflow-x: auto; }
.timeline-img { display: block; max-width: 100%; margin-top: var(--space-sm); border-radius: var(--radius-md); border: 1px solid var(--color-border); }
/* Định dạng giàu cho nội dung AI (formatRich) */
.fmt-red { color: var(--color-danger); }
.fmt-green { color: var(--color-success); }
.fmt-blue { color: var(--color-primary); }
.fmt-orange { color: var(--color-warning); }
.fmt-big { font-size: 1.3em; font-weight: var(--font-weight-semibold); }
.fmt-small { font-size: 0.82em; }
.fmt-hl { background: var(--color-warning-light); color: var(--color-warning); padding: 0 3px; border-radius: var(--radius-sm); }
/* Dấu 3 chấm "đang gõ" kiểu Zalo: bong bóng xám + sóng mượt theo thứ tự */
.typing-dots {
  display: inline-flex; align-items: center; gap: 4px;
  margin-left: 6px; padding: 6px 10px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  vertical-align: middle;
}
.typing-dots span {
  width: 7px; height: 7px; border-radius: var(--radius-full);
  background: var(--color-text-tertiary); display: inline-block;
  animation: typing-wave 1.4s infinite ease-in-out both;
}
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing-wave {
  0%, 80%, 100% { transform: translateY(0) scale(0.8); opacity: 0.4; }
  40% { transform: translateY(-4px) scale(1); opacity: 1; }
}
/* Thu gọn report tiến độ đã xong: hiện 1 dòng tóm tắt + nút mở chi tiết */
.progress-toggle { background: none; border: none; color: var(--color-primary); cursor: pointer; font-size: var(--font-size-xs); padding: 0 0 0 var(--space-xs); }
.progress-full { margin-top: var(--space-xs); white-space: pre-wrap; color: var(--color-text); }
.timeline-replyref { font-size: var(--font-size-xs); color: var(--color-text-tertiary); margin-bottom: var(--space-xs); font-style: italic; }

/* ---- Compose bar (soạn request) ---- */
.compose { display: flex; flex-direction: column; gap: var(--space-sm); }
.compose-row { display: flex; gap: var(--space-sm); align-items: flex-end; }
.compose .form-textarea { min-height: 64px; }

/* ---- Composer kiểu chat (Zalo): cố định đáy ---- */
.composer {
  position: fixed; left: 0; right: 0; bottom: var(--bottom-nav-height);
  z-index: 55;
  display: flex; flex-direction: column; gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}
.composer-row { display: flex; align-items: center; gap: var(--space-sm); }
.composer-attach {
  flex: 0 0 auto; width: var(--touch-min); height: var(--touch-min);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: var(--font-size-lg);
  background: var(--color-bg-secondary); color: var(--color-text-secondary);
  border: 1px solid var(--color-border); border-radius: var(--radius-full); cursor: pointer;
}
.composer-attach:hover { background: var(--color-bg-tertiary); }
.composer-preview { display: flex; align-items: center; gap: var(--space-sm); padding: var(--space-xs) 0; }
.composer-preview img { height: 48px; width: 48px; object-fit: cover; border-radius: var(--radius-md); border: 1px solid var(--color-border); }
.composer-preview .preview-remove { background: none; border: none; color: var(--color-danger); cursor: pointer; font-size: var(--font-size-base); }
.composer-preview .preview-name { font-size: var(--font-size-xs); color: var(--color-text-secondary); }
.composer-kind {
  flex: 0 0 auto; width: auto;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-xs); color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border); border-radius: var(--radius-full);
  cursor: pointer;
}
.composer-input {
  flex: 1; min-width: 0;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base); font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border); border-radius: var(--radius-full);
}
.composer-input:focus { outline: none; border-color: var(--color-border-focus); background: var(--color-bg); }
.composer-input::placeholder { color: var(--color-text-tertiary); }
.composer-send {
  flex: 0 0 auto;
  width: var(--touch-min); height: var(--touch-min);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: var(--font-size-lg);
  color: var(--color-text-inverse); background: var(--color-primary);
  border: none; border-radius: var(--radius-full); cursor: pointer;
  transition: background var(--transition-fast);
}
.composer-send:hover:not(:disabled) { background: var(--color-primary-hover); }
.composer-send:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---- FAB (nút nổi) — mở Cổng duyệt; balloon đếm số chờ duyệt ---- */
.fab {
  position: fixed; right: var(--space-md);
  bottom: calc(var(--bottom-nav-height) + 64px + var(--space-md));
  z-index: 58;
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px;
  font-size: var(--font-size-xl);
  background: var(--color-warning); color: var(--color-text-inverse);
  border: none; border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg); cursor: pointer;
}
.fab:hover { filter: brightness(0.95); }
.fab-badge {
  position: absolute; top: -4px; right: -4px;
  min-width: 20px; height: 20px; padding: 0 5px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: var(--font-size-xs); font-weight: var(--font-weight-bold);
  color: var(--color-text-inverse); background: var(--color-danger);
  border: 2px solid var(--color-bg); border-radius: var(--radius-full);
}

/* Chừa chỗ cho composer cố định để timeline không bị che */
.has-composer .app-main { padding-bottom: calc(var(--bottom-nav-height) + 56px + var(--space-md)); }

/* ---- Auth (login) shell — căn giữa, mobile-first ---- */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: var(--space-lg); background: var(--color-bg-secondary); }
.auth-card { width: 100%; max-width: 400px; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-xl); box-shadow: var(--shadow-md); padding: var(--space-xl); }
.auth-logo { text-align: center; margin-bottom: var(--space-lg); }
.auth-logo h1 { font-size: var(--font-size-2xl); font-weight: var(--font-weight-bold); }
.auth-logo p { font-size: var(--font-size-sm); color: var(--color-text-secondary); margin-top: var(--space-xs); }

/* Touch target tối thiểu cho control trên mobile */
@media (max-width: 767px) {
  .btn { min-height: var(--touch-min); }
  .form-input, .form-select, .form-textarea { font-size: var(--font-size-base); }
}

/* Section block + empty state */
.section-title { font-size: var(--font-size-sm); font-weight: var(--font-weight-semibold); color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: 0.03em; margin-bottom: var(--space-sm); }
.empty-state { padding: var(--space-2xl) var(--space-md); text-align: center; color: var(--color-text-tertiary); }
.block-loading { display: flex; align-items: center; justify-content: center; gap: var(--space-sm); padding: var(--space-2xl); color: var(--color-text-secondary); }