/* Hoàng Việt LMS — đồng bộ font/màu với quanly (Open Sans + primary red) */

:root {
  /* Brand HV (themes.css data-theme=red) */
  --primary-50: #fef2f2;
  --primary-100: #fee2e2;
  --primary-200: #fecaca;
  --primary-500: #ef4444;
  --primary-600: #dc2626;
  --primary-700: #b91c1c;
  --primary-800: #991b1b;
  --primary-900: #7f1d1d;

  --lms-ink: #344767;
  --lms-muted: #67748e;
  --lms-accent: var(--primary-600);
  --lms-accent-deep: var(--primary-800);
  --lms-accent-soft: var(--primary-50);
  --lms-side: #7f1d1d;
  --lms-side-2: #b91c1c;
  --lms-side-text: #fef2f2;
  --lms-side-muted: rgba(254, 242, 242, 0.72);
  --lms-bg: #f8f9fa;
  --lms-card: #ffffff;
  --lms-line: #e9ecef;
  --lms-warn: #b45309;
  --lms-danger: #b91c1c;
  --lms-radius: 12px;
  --lms-side-w: 260px;
  --lms-shadow: 0 8px 24px rgba(52, 71, 103, 0.08);
  --lms-font: "Open Sans", "Segoe UI", Helvetica, Arial, sans-serif;
  --lms-display: "Open Sans", "Segoe UI", Helvetica, Arial, sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

body.lms-body {
  margin: 0;
  min-height: 100vh;
  color: var(--lms-ink);
  font-family: var(--lms-font);
  font-size: 0.925rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(900px 420px at 100% -10%, rgba(220, 38, 38, 0.08), transparent 55%),
    radial-gradient(700px 360px at -5% 30%, rgba(254, 226, 226, 0.55), transparent 50%),
    linear-gradient(165deg, #fef2f2 0%, var(--lms-bg) 42%, #ffffff 100%);
}

a { color: var(--primary-700); }
a:hover { color: var(--primary-600); }

/* —— App shell —— */
.lms-app {
  display: flex;
  min-height: 100vh;
}

.lms-sidebar {
  width: var(--lms-side-w);
  flex-shrink: 0;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.08), transparent 30%),
    linear-gradient(180deg, var(--primary-600) 0%, var(--primary-800) 55%, var(--primary-900) 100%);
  color: var(--lms-side-text);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 40;
  border-right: 1px solid rgba(255,255,255,0.08);
}

.lms-sidebar-brand {
  padding: 1.25rem 1.15rem 1rem;
  text-decoration: none;
  color: #fff;
  display: block;
}

.lms-sidebar-brand .lms-mark {
  font-family: var(--lms-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.lms-sidebar-brand .lms-mark em {
  font-style: normal;
  color: #fecaca;
  font-weight: 700;
}

.lms-sidebar-brand small {
  display: block;
  margin-top: 0.25rem;
  color: var(--lms-side-muted);
  font-size: 0.72rem;
  font-weight: 600;
}

.lms-side-nav {
  padding: 0.35rem 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  flex: 1;
  overflow-y: auto;
}

.lms-side-label {
  margin: 0.85rem 0.55rem 0.35rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lms-side-muted);
}

.lms-side-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.62rem 0.75rem;
  border-radius: 10px;
  color: var(--lms-side-text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background .15s ease, border-color .15s ease;
}

.lms-side-link i {
  width: 1.15rem;
  text-align: center;
  opacity: 0.95;
}

.lms-side-link:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
}

.lms-side-link.is-active {
  background: rgba(255,255,255,0.18);
  border-color: rgba(255,255,255,0.22);
  color: #fff;
}

.lms-side-footer {
  padding: 0.85rem 1rem 1.1rem;
  border-top: 1px solid rgba(255,255,255,0.12);
}

.lms-user-chip {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.65rem;
}

.lms-user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255,255,255,0.18);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.lms-user-meta { min-width: 0; }
.lms-user-meta strong {
  display: block;
  font-size: 0.82rem;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lms-user-meta span {
  font-size: 0.72rem;
  color: var(--lms-side-muted);
}

.lms-side-logout {
  display: flex;
  width: 100%;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.7rem;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.2);
  background: transparent;
  color: var(--lms-side-text);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
}

.lms-side-logout:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
}

/* —— Main —— */
.lms-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.lms-topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1.35rem;
  background: rgba(255,255,255,0.92);
  border-bottom: 1px solid var(--lms-line);
  backdrop-filter: blur(10px);
}

.lms-topbar-left {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.lms-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--lms-line);
  background: #fff;
  color: var(--lms-ink);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.lms-page-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--lms-ink);
}

.lms-topbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: flex-end;
}

.lms-content {
  padding: 1.25rem 1.35rem 2.5rem;
  max-width: 1180px;
  width: 100%;
  margin: 0 auto;
}

.lms-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(52, 71, 103, 0.45);
  z-index: 35;
}

body.lms-sidebar-open .lms-backdrop { display: block; }

/* —— Auth / bare —— */
body.lms-body--bare .lms-app { display: block; }
body.lms-body--bare .lms-content {
  max-width: 560px;
  padding-top: 3rem;
}
.lms-auth-hero {
  text-align: center;
  margin-bottom: 1.25rem;
}
.lms-auth-hero .lms-mark {
  font-family: var(--lms-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--lms-ink);
  letter-spacing: -0.02em;
}
.lms-auth-hero .lms-mark em {
  font-style: normal;
  color: var(--primary-600);
}
.lms-auth-hero p {
  margin: 0.35rem 0 0;
  color: var(--lms-muted);
  font-weight: 600;
}

/* —— Components —— */
.lms-card {
  background: var(--lms-card);
  border: 1px solid var(--lms-line);
  border-radius: var(--lms-radius);
  padding: 1.1rem 1.2rem;
  margin-bottom: 1rem;
  box-shadow: var(--lms-shadow);
}

.lms-card--soft {
  background: linear-gradient(180deg, #ffffff 0%, var(--primary-50) 160%);
}

.lms-h1 {
  font-size: 1.45rem;
  font-weight: 700;
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
  font-family: var(--lms-display);
  color: var(--lms-ink);
}

.lms-h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--lms-ink);
}

.lms-muted { color: var(--lms-muted); font-size: 0.875rem; }
.lms-lead { margin: 0 0 1rem; color: var(--lms-muted); max-width: 62ch; }

.lms-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.48rem 0.85rem;
  border-radius: 8px;
  border: 1px solid var(--lms-line);
  background: #fff;
  color: var(--lms-ink);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  line-height: 1.2;
}
.lms-btn:hover { background: var(--primary-50); color: var(--primary-700); border-color: var(--primary-200); }
.lms-btn-primary {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
  border-color: var(--primary-600);
  color: #fff;
}
.lms-btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-700) 100%);
  color: #fff;
}
.lms-btn-danger { color: var(--lms-danger); border-color: #fecaca; }
.lms-btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--lms-muted);
}
.lms-btn-block { width: 100%; justify-content: center; }

.lms-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.lms-table th,
.lms-table td {
  text-align: left;
  padding: 0.65rem 0.45rem;
  border-bottom: 1px solid #f1f3f5;
  vertical-align: middle;
}
.lms-table th {
  color: var(--lms-muted);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 700;
}
.lms-table tr:hover td { background: var(--primary-50); }
.lms-table a { font-weight: 700; text-decoration: none; color: var(--primary-700); }

.lms-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
}
.lms-badge-open { background: #d1fae5; color: #047857; }
.lms-badge-draft { background: #e2e8f0; color: #475569; }
.lms-badge-closed { background: var(--primary-100); color: var(--primary-800); }

.lms-flash {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}
.lms-flash li {
  padding: 0.7rem 0.95rem;
  border-radius: 10px;
  margin-bottom: 0.4rem;
  font-size: 0.875rem;
  border: 1px solid transparent;
}
.lms-flash .ok { background: #ecfdf5; color: #065f46; border-color: #a7f3d0; }
.lms-flash .err { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.lms-flash .warn { background: #fffbeb; color: #92400e; border-color: #fde68a; }
.lms-flash .info { background: #eff6ff; color: #1e40af; border-color: #bfdbfe; }

.lms-form label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: #344767;
  margin: 0.65rem 0 0.25rem;
}
.lms-form input[type=text],
.lms-form input[type=password],
.lms-form input[type=number],
.lms-form input[type=datetime-local],
.lms-form input[type=url],
.lms-form input[type=email],
.lms-form select,
.lms-form textarea {
  width: 100%;
  padding: 0.58rem 0.75rem;
  border: 1px solid #d2d6da;
  border-radius: 8px;
  font-size: 0.875rem;
  background: #fff;
  font-family: inherit;
  color: var(--lms-ink);
}
.lms-form textarea { min-height: 110px; resize: vertical; }
.lms-form input:focus,
.lms-form select:focus,
.lms-form textarea:focus {
  outline: 2px solid rgba(220, 38, 38, 0.2);
  border-color: var(--primary-500);
}

.lms-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}
.lms-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}
.lms-stat {
  padding: 1rem 1.1rem;
}
.lms-stat .lms-muted { margin-bottom: 0.25rem; }
.lms-stat strong {
  display: block;
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--primary-700);
}

.lms-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: flex-end;
  justify-content: space-between;
}

.lms-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: flex-end;
}
.lms-filters > div { min-width: 120px; flex: 1; }

.lms-course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.85rem;
}

.lms-course-card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1rem 1.05rem;
  border: 1px solid var(--lms-line);
  border-radius: var(--lms-radius);
  background: #fff;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--lms-shadow);
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
  min-height: 140px;
}
.lms-course-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary-200);
  box-shadow: 0 10px 28px rgba(220, 38, 38, 0.12);
  color: inherit;
}
.lms-course-card h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--lms-ink);
}
.lms-course-card .meta {
  font-size: 0.8rem;
  color: var(--lms-muted);
  margin-top: auto;
}

.lms-empty {
  text-align: center;
  padding: 1.5rem 1rem;
  color: var(--lms-muted);
}

.mb-0 { margin-bottom: 0 !important; }
.mb-3 { margin-bottom: 1rem !important; }

/* —— Responsive —— */
@media (max-width: 900px) {
  .lms-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-105%);
    transition: transform .2s ease;
    box-shadow: 12px 0 40px rgba(0,0,0,0.25);
  }
  body.lms-sidebar-open .lms-sidebar { transform: translateX(0); }
  .lms-menu-toggle { display: inline-flex; }
  .lms-grid-2,
  .lms-grid-3 { grid-template-columns: 1fr; }
  .lms-content { padding: 1rem 0.95rem 2rem; }
}

@media (prefers-reduced-motion: reduce) {
  .lms-side-link,
  .lms-course-card,
  .lms-sidebar { transition: none; }
}