:root {
  --mn-primary: #2563eb;
  --mn-primary-dark: #1d4ed8;
  --mn-bg: #f4f6fb;
  --mn-sidebar-width: 250px;
  --mn-navbar-height: 60px;
}

body {
  background-color: var(--mn-bg);
  font-family: "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
  color: #1f2937;
}

/* ---------------------------------------------------------------
   Navbar
--------------------------------------------------------------- */
.mn-navbar {
  background: #ffffff;
  height: var(--mn-navbar-height);
  border-bottom: 1px solid #e5e7eb;
  z-index: 1030;
}
.mn-toggle-btn {
  border: none;
  background: transparent;
}

/* ---------------------------------------------------------------
   Layout
--------------------------------------------------------------- */
.mn-wrapper {
  display: flex;
  min-height: calc(100vh - var(--mn-navbar-height));
}

.mn-sidebar {
  width: var(--mn-sidebar-width);
  background: #ffffff;
  border-right: 1px solid #e5e7eb;
  min-height: calc(100vh - var(--mn-navbar-height));
  padding-top: 1rem;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.mn-nav .nav-link {
  color: #4b5563;
  padding: 0.65rem 1.25rem;
  border-radius: 0;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.mn-nav .nav-link i {
  font-size: 1.05rem;
}
.mn-nav .nav-link.active {
  background: #eff6ff;
  color: var(--mn-primary);
  border-right: 3px solid var(--mn-primary);
  font-weight: 600;
}
.mn-nav .nav-link:hover {
  background: #f3f4f6;
  color: var(--mn-primary);
}

.mn-content {
  flex: 1;
  padding: 1.75rem;
  max-width: 100%;
}

/* ---------------------------------------------------------------
   Cards
--------------------------------------------------------------- */
.mn-card {
  border: none;
  border-radius: 0.75rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.mn-card-header {
  background: #fff;
  border-bottom: 1px solid #f0f0f0;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 0.75rem 0.75rem 0 0 !important;
  padding: 0.9rem 1.25rem;
}

.mn-stat-card {
  border-radius: 0.9rem;
}
.mn-stat-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}

/* ---------------------------------------------------------------
   Images
--------------------------------------------------------------- */
.mn-thumb {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border: 1px solid #e5e7eb;
}
.mn-thumb-link {
  display: block;
}
.mn-file-tile {
  height: 120px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #f9fafb;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  color: #4b5563;
  text-decoration: none;
  transition: background 0.15s ease;
}
.mn-file-tile:hover {
  background: #eff6ff;
  color: var(--mn-primary);
}
.mn-file-tile i {
  font-size: 2rem;
}
.mn-file-tile span {
  font-size: 0.8rem;
  font-weight: 600;
}
.mn-preview-item {
  width: 90px;
  height: 90px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #e5e7eb;
  position: relative;
}
.mn-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------------------------------------------------------------
   Login page
--------------------------------------------------------------- */
.mn-login-body {
  background: linear-gradient(135deg, #eff6ff 0%, #f4f6fb 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mn-login-wrapper {
  width: 100%;
  max-width: 420px;
  padding: 1rem;
}
.mn-login-card {
  border-radius: 1rem;
}

/* ---------------------------------------------------------------
   Responsive sidebar (mobile)
--------------------------------------------------------------- */
@media (max-width: 991.98px) {
  .mn-sidebar {
    position: fixed;
    top: var(--mn-navbar-height);
    left: 0;
    height: calc(100vh - var(--mn-navbar-height));
    transform: translateX(-100%);
    z-index: 1020;
  }
  .mn-sidebar.show {
    transform: translateX(0);
    box-shadow: 4px 0 12px rgba(0,0,0,0.08);
  }
  .mn-content {
    padding: 1.25rem;
  }
}