:root {
  --primary: #078C86;
  --primary-dark: #056963;
  --primary-light: #E8F6F5;
  --title: #123A4A;
  --danger: #D64545;
  --warning: #F59E0B;
  --success: #10B981;
  --white: #ffffff;
  --bg: #F5F7F7;
  --border: #E5E9EA;
  --text: #2D3748;
  --text-secondary: #6B7B82;
  --sidebar-width: 250px;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: 'Be Vietnam Pro', sans-serif; background: var(--bg); color: var(--text); line-height:1.6; }
.num, input[type="number"] { font-family: 'Inter', monospace; }

/* ─── LOGIN ─── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #078C86 0%, #056963 100%);
}
.login-card {
  background: var(--white);
  padding: 48px 40px;
  border-radius: 16px;
  width: 400px;
  max-width: 90vw;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}
.login-card h1 { font-size: 22px; color: var(--title); margin-bottom: 4px; }
.login-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 28px; }
.login-card .brand {
  color: var(--primary); font-weight: 700; font-size: 24px; margin-bottom: 20px; display: block;
}
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.form-group input, .form-group select {
  width: 100%; padding: 10px 14px; border: 1.5px solid var(--border); border-radius: var(--radius);
  font-size: 14px; font-family: inherit; outline: none; transition: border-color .2s;
}
.form-group input:focus { border-color: var(--primary); }
.error-msg { font-size: 12px; color: var(--danger); margin-top: 4px; display: none; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border: none; border-radius: var(--radius); font-size: 14px;
  font-weight: 600; font-family: inherit; cursor: pointer; transition: all .2s;
}
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); color: var(--white); }
.btn-danger:hover { background: #b83030; }
.btn-outline { background: var(--white); color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary-light); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-full { width: 100%; justify-content: center; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ─── LAYOUT ─── */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-width); background: var(--white); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; position: fixed; top: 0; left: 0; height: 100vh; z-index: 100;
}
.sidebar-header {
  padding: 20px 16px; border-bottom: 1px solid var(--border);
  font-size: 16px; font-weight: 700; color: var(--primary);
}
.sidebar-user {
  padding: 12px 16px; border-bottom: 1px solid var(--border); font-size: 12px;
}
.sidebar-user strong { display: block; font-size: 13px; color: var(--text); }
.sidebar-user span { color: var(--text-secondary); }
.sidebar-nav { flex: 1; padding: 8px; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; text-decoration: none;
  color: var(--text); font-size: 14px; border-radius: 6px; margin-bottom: 2px; transition: all .15s;
}
.sidebar-nav a:hover { background: var(--primary-light); color: var(--primary); }
.sidebar-nav a.active { background: var(--primary); color: var(--white); }
.sidebar-nav a .icon { font-size: 18px; width: 22px; text-align: center; }
.sidebar-footer { padding: 12px 16px; border-top: 1px solid var(--border); }
.sidebar-footer a {
  display: flex; align-items: center; gap: 8px; text-decoration: none;
  color: var(--text-secondary); font-size: 13px; cursor: pointer;
}
.sidebar-footer a:hover { color: var(--danger); }
.main { margin-left: var(--sidebar-width); flex: 1; }
.topbar {
  background: var(--white); border-bottom: 1px solid var(--border); padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 99;
}
.topbar h2 { font-size: 18px; color: var(--title); }
.content { padding: 24px; }

/* ─── CARDS ─── */
.card {
  background: var(--white); border-radius: var(--radius); border: 1px solid var(--border);
  margin-bottom: 16px;
}
.card-header {
  padding: 16px 20px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.card-header h3 { font-size: 15px; color: var(--title); }
.card-body { padding: 20px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; display: flex; flex-direction: column; gap: 4px;
}
.stat-card .value { font-size: 28px; font-weight: 700; color: var(--title); font-family: 'Inter', monospace; }
.stat-card .label { font-size: 13px; color: var(--text-secondary); }

/* ─── TABLE ─── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th {
  text-align: left; padding: 10px 14px; font-size: 12px; font-weight: 600;
  color: var(--text-secondary); border-bottom: 1px solid var(--border); white-space: nowrap;
}
td { padding: 10px 14px; font-size: 13px; border-bottom: 1px solid var(--border); }
tr:hover td { background: #F8FAFA; }
.table-controls {
  display: flex; align-items: center; gap: 12px; padding: 12px 20px;
  border-bottom: 1px solid var(--border); flex-wrap: wrap;
}
.table-controls input, .table-controls select {
  padding: 8px 12px; border: 1.5px solid var(--border); border-radius: 6px;
  font-size: 13px; font-family: inherit; outline: none;
}
.table-controls input:focus { border-color: var(--primary); }
.table-controls .search-box { min-width: 240px; }
.pagination {
  display: flex; align-items: center; justify-content: center; gap: 4px; padding: 16px;
}
.pagination button {
  padding: 6px 12px; border: 1px solid var(--border); border-radius: 4px;
  background: var(--white); color: var(--text); font-size: 13px; cursor: pointer;
}
.pagination button:hover { background: var(--primary-light); }
.pagination button.active { background: var(--primary); color: var(--white); border-color: var(--primary); }
.pagination button:disabled { opacity: 0.3; cursor: default; }

/* ─── BADGES ─── */
.badge {
  display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 11px;
  font-weight: 600; white-space: nowrap;
}
.badge-green { background: #D1FAE5; color: #065F46; }
.badge-gray { background: #F3F4F6; color: #6B7280; }
.badge-red { background: #FEE2E2; color: var(--danger); }
.badge-orange { background: #FEF3C7; color: #92400E; }
.badge-blue { background: #DBEAFE; color: #1E40AF; }

/* ─── TOAST ─── */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  padding: 12px 20px; border-radius: var(--radius); color: var(--white);
  font-size: 14px; font-weight: 500; box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  animation: slideIn .3s ease; max-width: 360px;
}
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: var(--warning); color: #333; }
@keyframes slideIn { from { transform: translateX(100%); opacity:0; } to { transform:translateX(0); opacity:1; } }

/* ─── FORM ─── */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group textarea { width: 100%; padding: 10px 14px; border: 1.5px solid var(--border); border-radius: var(--radius); font-size: 14px; font-family: inherit; outline: none; resize: vertical; min-height: 80px; }
.form-group textarea:focus { border-color: var(--primary); }
.form-group .hint { font-size: 11px; color: var(--text-secondary); margin-top: 2px; }
.form-group .field-error { font-size: 12px; color: var(--danger); margin-top: 2px; display: none; }
.form-group.has-error input, .form-group.has-error select, .form-group.has-error textarea { border-color: var(--danger); }
.form-group.has-error .field-error { display: block; }
.form-actions { display: flex; gap: 12px; justify-content: flex-end; padding-top: 16px; border-top: 1px solid var(--border); margin-top: 16px; }

/* ─── TABS ─── */
.tabs { display: flex; border-bottom: 2px solid var(--border); margin-bottom: 20px; }
.tab-btn {
  padding: 10px 20px; font-size: 14px; font-weight: 600; background: none; border: none;
  color: var(--text-secondary); cursor: pointer; border-bottom: 2px solid transparent;
  margin-bottom: -2px; transition: all .2s; font-family: inherit;
}
.tab-btn:hover { color: var(--primary); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ─── IMAGE UPLOAD ─── */
.image-grid { display: flex; gap: 12px; flex-wrap: wrap; }
.image-item {
  width: 100px; height: 100px; border-radius: var(--radius); border: 1.5px dashed var(--border);
  display: flex; align-items: center; justify-content: center; overflow: hidden; position: relative; cursor: pointer;
  background: #FAFBFC; font-size: 28px; color: var(--text-secondary);
}
.image-item img { width: 100%; height: 100%; object-fit: cover; }
.image-item .remove-btn {
  position: absolute; top: 2px; right: 2px; width: 20px; height: 20px; border-radius: 50%;
  background: rgba(0,0,0,0.6); color: white; border: none; font-size: 12px;
  display: flex; align-items: center; justify-content: center; cursor: pointer;
}
.image-item .main-badge {
  position: absolute; bottom: 2px; left: 2px; font-size: 9px;
  background: var(--primary); color: white; padding: 1px 6px; border-radius: 4px;
}

/* ─── VARIANTS TABLE ─── */
.variant-table { width: 100%; border-collapse: collapse; }
.variant-table th { background: #F8FAFA; }
.variant-table input, .variant-table select {
  width: 100%; padding: 6px 8px; border: 1px solid var(--border); border-radius: 4px;
  font-size: 13px; font-family: inherit; outline: none;
}
.variant-table input:focus { border-color: var(--primary); }
.variant-table .discount-badge {
  display: inline-block; padding: 1px 8px; border-radius: 10px;
  background: #FEF3C7; color: #92400E; font-size: 11px; font-weight: 600;
}

/* ─── DIALOG ─── */
.dialog-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.4); display: flex;
  align-items: center; justify-content: center; z-index: 9998;
}
.dialog {
  background: var(--white); border-radius: 12px; padding: 28px; width: 420px; max-width: 90vw; box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.dialog h3 { font-size: 16px; color: var(--title); margin-bottom: 8px; }
.dialog p { font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; }
.dialog-actions { display: flex; gap: 10px; justify-content: flex-end; }
.dialog .btn-cancel { background: var(--bg); color: var(--text); }
.dialog .btn-cancel:hover { background: var(--border); }

/* ─── BATCH BAR ─── */
.batch-bar {
  display: none; align-items: center; gap: 12px; padding: 10px 20px;
  background: var(--primary-light); border-bottom: 1px solid var(--primary);
}
.batch-bar.show { display: flex; }
.batch-bar span { font-size: 13px; font-weight: 600; color: var(--primary); }

/* ─── STATUS MAP ─── */
.status-edit { cursor: pointer; }

/* ─── NAV SECTION LABEL ─── */
.nav-section-label {
  padding: 8px 12px 4px; font-size: 11px; font-weight: 600;
  color: var(--text-secondary); text-transform: uppercase; letter-spacing: .5px;
}

/* ─── SIDEBAR TOGGLE (mobile) ─── */
.menu-btn {
  display: none; background: none; border: none; font-size: 22px;
  cursor: pointer; color: var(--title); padding: 0; line-height: 1;
}
.sidebar-overlay { display: none; }
.sidebar-close { display: none; }

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .menu-btn { display: block; }
  .sidebar {
    transform: translateX(-100%); transition: transform .25s ease;
    z-index: 1001; box-shadow: 2px 0 20px rgba(0,0,0,0.1);
  }
  .sidebar-open .sidebar { transform: translateX(0); }
  .sidebar-open .sidebar-overlay {
    display: block; position: fixed; inset: 0; background: rgba(0,0,0,0.4);
    z-index: 1000;
  }
  .sidebar-close { display: flex; align-items: center; justify-content: center; background: none; border: none; font-size: 18px; cursor: pointer; color: var(--text-secondary); margin-left: auto; width: 32px; height: 32px; }
  .sidebar-header { display: flex; align-items: center; }
  .main { margin-left: 0; }
  .form-row { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .content { padding: 16px; }
  .topbar { padding: 12px 16px; }
  .topbar h2 { font-size: 15px; }
  .table-controls { flex-direction: column; align-items: stretch; }
  .table-controls .search-box { min-width: 0; width: 100%; }
  .dialog { padding: 20px; }
  .card-body { padding: 14px; }
  th, td { padding: 8px 10px; font-size: 12px; }
  .form-actions { flex-direction: column; }
  .form-actions .btn { width: 100%; justify-content: center; }
  .login-card { padding: 32px 24px; }
  .tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .tab-btn { white-space: nowrap; padding: 10px 14px; font-size: 13px; }
  .card-header { flex-wrap: wrap; gap: 8px; }
  .card-header .btn-sm { padding: 4px 9px; font-size: 11px; }
}

@media (max-width: 480px) {
  .stat-grid { grid-template-columns: 1fr; }
  .stat-card .value { font-size: 22px; }
  .table-controls { padding: 10px 14px; }
  th, td { padding: 6px 8px; font-size: 11px; }
  .dialog { padding: 16px; width: 95vw; }
  .toast { max-width: 280px; font-size: 13px; }
}

/* ─── INBOX ─── */
.inbox-layout .conv-item:hover { background: var(--primary-light); }
.inbox-layout .conv-active { background: var(--primary-light); }
@media (max-width: 900px) {
  .inbox-layout { grid-template-columns: 1fr !important; }
}