/* =========================================================
   Bookstore CRM — Premium Light Theme
========================================================= */
:root {
  --bg: #f5f6fb;
  --surface: #ffffff;
  --surface-soft: #fbfbfe;
  --border: #eceef4;
  --text: #1e2130;
  --text-muted: #8890a4;
  --accent: #5b5ff2;
  --accent-2: #8b5cf6;
  --accent-soft: #eef0ff;
  --accent-grad: linear-gradient(135deg, #5b5ff2 0%, #8b5cf6 100%);
  --success: #16a34a;
  --success-soft: #eafaf0;
  --danger: #e11d48;
  --danger-soft: #fdeef1;
  --warning: #d97706;
  --warning-soft: #fef6e7;
  --info: #0ea5e9;
  --info-soft: #e9f8ff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(30, 33, 48, 0.05);
  --shadow-md: 0 8px 24px rgba(30, 33, 48, 0.06);
  --shadow-lg: 0 16px 40px rgba(91, 95, 242, 0.12);
  --sidebar-w: 264px;
}

* { box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14.5px;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; }
::selection { background: var(--accent-soft); color: var(--accent); }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #d9dcec; border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: #c2c6e0; }

/* =========================================================
   Layout shell
========================================================= */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 1030;
  transition: transform .25s ease;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 22px 22px 18px;
}
.sidebar-brand .logo-box {
  width: 40px; height: 40px;
  border-radius: 12px;
  background: var(--accent-grad);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 18px;
  box-shadow: 0 6px 16px rgba(91,95,242,.35);
}
.sidebar-brand .brand-text { font-weight: 700; font-size: 17px; letter-spacing: -.2px; }
.sidebar-brand .brand-sub { font-size: 11px; color: var(--text-muted); font-weight: 500; }

.sidebar-nav { flex: 1; overflow-y: auto; padding: 6px 14px 20px; }
.nav-section-title {
  font-size: 10.5px; text-transform: uppercase; letter-spacing: .08em;
  color: #b3b7cc; font-weight: 700; margin: 18px 10px 8px;
}
.sidebar-nav .nav-link {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  color: #565b74; font-weight: 500; font-size: 13.8px;
  margin-bottom: 2px; position: relative;
  transition: all .15s ease;
}
.sidebar-nav .nav-link i { font-size: 17px; width: 20px; text-align: center; color: #a2a6bd; transition: color .15s ease; }
.sidebar-nav .nav-link:hover { background: var(--surface-soft); color: var(--text); }
.sidebar-nav .nav-link:hover i { color: var(--accent); }
.sidebar-nav .nav-link.active {
  background: var(--accent-soft); color: var(--accent); font-weight: 600;
}
.sidebar-nav .nav-link.active i { color: var(--accent); }
.sidebar-nav .nav-link .badge-count {
  margin-left: auto; font-size: 10.5px; padding: 2px 7px; border-radius: 20px;
  background: var(--danger-soft); color: var(--danger); font-weight: 700;
}

.sidebar-footer { padding: 14px; border-top: 1px solid var(--border); }
.sidebar-user {
  display: flex; align-items: center; gap: 10px; padding: 8px;
  border-radius: var(--radius-sm); background: var(--surface-soft);
}
.sidebar-user .avatar {
  width: 36px; height: 36px; border-radius: 10px; background: var(--accent-grad);
  display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 13px;
}
.sidebar-user .u-name { font-size: 13px; font-weight: 600; color: var(--text); line-height: 1.2; }
.sidebar-user .u-role { font-size: 11px; color: var(--text-muted); }

/* Main content */
.main-content { margin-left: var(--sidebar-w); flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  height: 68px; background: rgba(255,255,255,.85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 28px; position: sticky; top: 0; z-index: 1020;
}
.topbar .page-title { font-size: 19px; font-weight: 700; letter-spacing: -.3px; }
.topbar-search {
  background: var(--surface-soft); border: 1px solid var(--border); border-radius: 10px;
  padding: 8px 14px; display: flex; align-items: center; gap: 8px; width: 300px; color: var(--text-muted);
}
.topbar-search input { border: none; background: transparent; outline: none; font-size: 13.5px; width: 100%; }
.topbar-actions { display: flex; align-items: center; gap: 14px; }
.icon-btn {
  width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); position: relative; transition: all .15s ease;
}
.icon-btn:hover { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.icon-btn .dot { position: absolute; top: 7px; right: 8px; width: 7px; height: 7px; background: var(--danger); border-radius: 50%; border: 2px solid #fff; }

.page-body { padding: 26px 28px 50px; }

.btn-toggle-sidebar { display: none; }

/* =========================================================
   Cards
========================================================= */
.card-premium {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); transition: box-shadow .2s ease;
}
.card-premium:hover { box-shadow: var(--shadow-md); }
.card-premium .card-header-clean {
  padding: 18px 22px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.card-premium .card-header-clean h6 { margin: 0; font-weight: 700; font-size: 14.5px; }
.card-body-clean { padding: 22px; }

/* Stat cards */
.stat-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 22px; box-shadow: var(--shadow-sm); position: relative; overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.stat-card .stat-icon {
  width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  font-size: 19px; margin-bottom: 14px;
}
.stat-card .stat-label { font-size: 12.5px; color: var(--text-muted); font-weight: 600; margin-bottom: 4px; }
.stat-card .stat-value { font-size: 24px; font-weight: 800; letter-spacing: -.5px; }
.stat-card .stat-delta { font-size: 12px; font-weight: 600; margin-top: 6px; display: inline-flex; align-items: center; gap: 4px; }

.bg-icon-violet { background: var(--accent-soft); color: var(--accent); }
.bg-icon-green { background: var(--success-soft); color: var(--success); }
.bg-icon-orange { background: var(--warning-soft); color: var(--warning); }
.bg-icon-blue { background: var(--info-soft); color: var(--info); }
.bg-icon-red { background: var(--danger-soft); color: var(--danger); }

/* =========================================================
   Buttons
========================================================= */
.btn { border-radius: 10px; font-weight: 600; font-size: 13.5px; padding: 9px 18px; }
.btn-premium {
  background: var(--accent-grad); border: none; color: #fff;
  box-shadow: 0 6px 16px rgba(91,95,242,.3);
}
.btn-premium:hover { color: #fff; filter: brightness(1.06); box-shadow: 0 8px 20px rgba(91,95,242,.4); }
.btn-outline-premium { border: 1.5px solid var(--border); color: var(--text); background: var(--surface); }
.btn-outline-premium:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.btn-soft-danger { background: var(--danger-soft); color: var(--danger); border: none; }
.btn-soft-danger:hover { background: var(--danger); color: #fff; }
.btn-sm-icon { width: 34px; height: 34px; padding: 0; display: inline-flex; align-items: center; justify-content: center; border-radius: 9px; }

/* =========================================================
   Tables
========================================================= */
.table-premium { margin-bottom: 0; }
.table-premium thead th {
  background: var(--surface-soft); color: var(--text-muted); font-size: 11.5px; text-transform: uppercase;
  letter-spacing: .05em; font-weight: 700; border: none; padding: 13px 16px; white-space: nowrap;
}
.table-premium tbody td { padding: 14px 16px; vertical-align: middle; border-color: var(--border); font-size: 13.5px; }
.table-premium tbody tr { transition: background .15s ease; }
.table-premium tbody tr:hover { background: var(--surface-soft); }
.table-premium tbody tr:last-child td { border-bottom: none; }

.book-thumb { width: 42px; height: 56px; object-fit: cover; border-radius: 6px; border: 1px solid var(--border); background: var(--surface-soft); }
.avatar-circle {
  width: 38px; height: 38px; border-radius: 50%; background: var(--accent-grad); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px;
}

/* Badges */
.badge-pill { padding: 5px 11px; border-radius: 20px; font-weight: 700; font-size: 11px; letter-spacing: .02em; }
.badge-available, .badge-active, .badge-delivered, .badge-success { background: var(--success-soft); color: var(--success); }
.badge-unavailable, .badge-inactive, .badge-cancelled, .badge-failed, .badge-danger { background: var(--danger-soft); color: var(--danger); }
.badge-pending, .badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-confirmed, .badge-shipped, .badge-info, .badge-packed { background: var(--info-soft); color: var(--info); }
.badge-neutral { background: var(--accent-soft); color: var(--accent); }

/* =========================================================
   Forms
========================================================= */
.form-label-premium { font-size: 12.5px; font-weight: 700; color: var(--text); margin-bottom: 6px; display: block; }
.form-control, .form-select {
  border: 1.5px solid var(--border); border-radius: 10px; padding: 10px 14px; font-size: 13.8px;
  background: var(--surface-soft);
}
.form-control:focus, .form-select:focus {
  border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); background: var(--surface);
}
textarea.form-control { min-height: 100px; }

.upload-drop {
  border: 2px dashed var(--border); border-radius: var(--radius-sm); padding: 24px; text-align: center;
  background: var(--surface-soft); cursor: pointer; transition: all .15s ease;
}
.upload-drop:hover { border-color: var(--accent); background: var(--accent-soft); }

/* =========================================================
   Login page
========================================================= */
.login-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(circle at 20% 20%, #eef0ff 0%, #f5f6fb 45%, #f5f6fb 100%);
  padding: 20px;
}
.login-card {
  background: var(--surface); border-radius: 22px; box-shadow: var(--shadow-lg);
  width: 100%; max-width: 400px; padding: 40px 36px; border: 1px solid var(--border);
}
.login-logo {
  width: 56px; height: 56px; border-radius: 16px; background: var(--accent-grad);
  display: flex; align-items: center; justify-content: center; color: #fff; font-size: 24px;
  margin: 0 auto 18px; box-shadow: 0 10px 24px rgba(91,95,242,.35);
}

/* =========================================================
   Misc
========================================================= */
.section-divider { height: 1px; background: var(--border); margin: 24px 0; }
.text-muted-soft { color: var(--text-muted); }
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state i { font-size: 42px; color: #d5d8e8; margin-bottom: 14px; }

.progress-slim { height: 6px; border-radius: 10px; background: var(--surface-soft); overflow: hidden; }
.progress-slim .bar { height: 100%; background: var(--accent-grad); border-radius: 10px; }

.dropdown-menu-premium { border-radius: 14px; border: 1px solid var(--border); box-shadow: var(--shadow-lg); padding: 8px; }
.dropdown-menu-premium .dropdown-item { border-radius: 9px; padding: 9px 12px; font-size: 13.5px; font-weight: 500; }
.dropdown-menu-premium .dropdown-item:hover { background: var(--accent-soft); color: var(--accent); }

.modal-content { border-radius: var(--radius); border: none; }

/* =========================================================
   Toolbar (search + filters + view switch) — used by all
   module list pages above the card grid
========================================================= */
.toolbar-premium {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px; box-shadow: var(--shadow-sm); margin-bottom: 20px;
}
.toolbar-search { position: relative; flex: 1 1 260px; min-width: 200px; }
.toolbar-search i {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); font-size: 15px; pointer-events: none;
}
.toolbar-search input {
  width: 100%; border: 1.5px solid var(--border); background: var(--surface-soft);
  border-radius: 12px; padding: 10px 14px 10px 38px; font-size: 13.8px; color: var(--text);
  transition: all .15s ease;
}
.toolbar-search input:focus {
  outline: none; border-color: var(--accent); background: var(--surface);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.toolbar-filter {
  border: 1.5px solid var(--border); background: var(--surface-soft); color: var(--text);
  border-radius: 12px; padding: 9px 32px 9px 14px; font-size: 13.2px; font-weight: 600;
  min-width: 130px;
}
.toolbar-filter:focus { outline: none; border-color: var(--accent); }
.toolbar-count { font-size: 12.5px; color: var(--text-muted); font-weight: 600; white-space: nowrap; padding: 0 4px; }
.view-switch { display: flex; gap: 2px; background: var(--surface-soft); border: 1px solid var(--border); border-radius: 10px; padding: 3px; }
.view-switch button {
  border: none; background: transparent; width: 32px; height: 30px; border-radius: 7px;
  color: var(--text-muted); font-size: 14px; display: flex; align-items: center; justify-content: center;
  transition: all .15s ease; cursor: pointer;
}
.view-switch button.active { background: var(--surface); color: var(--accent); box-shadow: var(--shadow-sm); }

/* =========================================================
   Grid shell
========================================================= */
.card-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
}
.card-grid.grid-wide { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid-hidden-row { display: none !important; }

/* =========================================================
   Book cover cards
========================================================= */
.book-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .22s ease, box-shadow .22s ease;
  display: flex; flex-direction: column; position: relative;
}
.book-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.book-card-cover {
  position: relative; width: 100%; aspect-ratio: 3/4; overflow: hidden; background: var(--surface-soft);
}
.book-card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.book-card:hover .book-card-cover img { transform: scale(1.06); }
.book-card-discount {
  position: absolute; top: 10px; left: 10px; background: var(--accent-grad); color: #fff;
  font-size: 10.5px; font-weight: 800; padding: 4px 9px; border-radius: 8px; box-shadow: 0 4px 10px rgba(91,95,242,.35);
}
.book-card-status {
  position: absolute; top: 10px; right: 10px; font-size: 10px; font-weight: 800; padding: 4px 9px;
  border-radius: 8px; backdrop-filter: blur(4px);
}
.book-card-gallery-badge {
  position: absolute; bottom: 10px; right: 10px; font-size: 10px; font-weight: 800; padding: 4px 8px;
  border-radius: 8px; background: rgba(20,22,38,.72); color: #fff; backdrop-filter: blur(4px);
  display: flex; align-items: center; gap: 4px; z-index: 2;
}
.book-card-overlay {
  position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20,22,38,0) 40%, rgba(20,22,38,.82) 100%);
  opacity: 0; transition: opacity .22s ease; display: flex; align-items: flex-end; justify-content: center; padding: 14px;
}
.book-card:hover .book-card-overlay { opacity: 1; }
.book-card-overlay .overlay-actions { display: flex; gap: 8px; width: 100%; }
.book-card-overlay .overlay-actions .btn { flex: 1; }
.book-card-body { padding: 13px 14px 15px; flex: 1; display: flex; flex-direction: column; }
.book-card-title {
  font-weight: 700; font-size: 13.6px; line-height: 1.3; margin-bottom: 3px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 35px;
}
.book-card-author { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.book-card-footer { margin-top: auto; display: flex; align-items: center; justify-content: space-between; }
.book-card-price { font-weight: 800; font-size: 14.5px; }
.book-card-price .old-price { font-weight: 500; font-size: 11px; color: var(--text-muted); text-decoration: line-through; margin-left: 5px; }
.book-card-stock { font-size: 10.5px; font-weight: 700; }

/* =========================================================
   Generic entity cards (authors, publishers, suppliers,
   categories, customers) — icon/avatar based
========================================================= */
.entity-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow-sm); position: relative; overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease; display: flex; flex-direction: column; height: 100%;
}
.entity-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--accent-grad); opacity: 0; transition: opacity .2s ease;
}
.entity-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.entity-card:hover::before { opacity: 1; }
.entity-card-top { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 14px; }
.entity-card-actions { display: flex; gap: 6px; opacity: 0; transition: opacity .18s ease; }
.entity-card:hover .entity-card-actions { opacity: 1; }
.entity-avatar-lg {
  width: 48px; height: 48px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  font-size: 19px; font-weight: 700; color: #fff; background: var(--accent-grad);
  box-shadow: 0 6px 16px rgba(91,95,242,.3); flex-shrink: 0;
}
.entity-avatar-lg.round { border-radius: 50%; }
.entity-card-name { font-weight: 700; font-size: 14.5px; margin-bottom: 2px; }
.entity-card-sub { font-size: 12px; color: var(--text-muted); margin-bottom: 12px; }
.entity-card-meta { display: flex; flex-direction: column; gap: 7px; font-size: 12.3px; margin-bottom: 12px; }
.entity-card-meta div { display: flex; align-items: center; gap: 8px; color: var(--text); }
.entity-card-meta i { color: var(--text-muted); width: 15px; text-align: center; font-size: 13px; }
.entity-card-footer {
  margin-top: auto; padding-top: 12px; border-top: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}

/* =========================================================
   Order cards
========================================================= */
.order-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease;
}
.order-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.order-card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.order-card-id { font-weight: 800; font-size: 15px; }
.order-card-row { display: flex; align-items: center; justify-content: space-between; padding: 6px 0; font-size: 12.8px; }
.order-card-row .label { color: var(--text-muted); font-weight: 600; }
.order-card-row .value { font-weight: 700; }

/* =========================================================
   Inventory cards
========================================================= */
.inv-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease;
  display: flex; flex-direction: column; height: 100%;
}
.inv-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.inv-card.is-low { border-color: rgba(225,29,72,.35); }
.inv-card-top { display: flex; gap: 12px; margin-bottom: 12px; }
.inv-card-top img { width: 48px; height: 64px; object-fit: cover; border-radius: 8px; border: 1px solid var(--border); }
.inv-card-title { font-weight: 700; font-size: 13.2px; line-height: 1.3; margin-bottom: 2px; }
.inv-card-isbn { font-size: 10.8px; color: var(--text-muted); }
.inv-stock-num { font-size: 22px; font-weight: 800; letter-spacing: -.5px; }
.inv-card-loc { font-size: 11.8px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; margin-top: 8px; }

/* Responsive */
@media (max-width: 992px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.show { transform: translateX(0); box-shadow: var(--shadow-lg); }
  .main-content { margin-left: 0; }
  .btn-toggle-sidebar { display: flex; }
  .topbar-search { display: none; }
}
@media (max-width: 576px) {
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
}