:root {
  --iym-bg: #f4f6f9;
  --iym-dark: #1f2937;
  --iym-accent: #2563eb;
}

html,
body {
  min-height: 100%;
}

body {
  background-color: var(--iym-bg);
  color: #1f2937;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1 0 auto;
}

/* Navbar */
.navbar-iym {
  background: linear-gradient(90deg, #111827 0%, #1f2937 100%);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.18);
}

.navbar-iym .navbar-brand {
  font-weight: 700;
  letter-spacing: 0.3px;
}

.navbar-iym .navbar-brand .brand-logo {
  height: 38px;
  width: auto;
}

.navbar-iym .navbar-nav .nav-link {
  border-radius: 0.4rem;
  padding: 0.5rem 1rem;
  color: #cbd5e1;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.navbar-iym .navbar-nav .nav-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

/* Cards */
.card-iym {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 0.75rem;
  box-shadow: 0 1px 3px rgba(16, 24, 40, 0.07);
}

/* Headings */
.page-title {
  font-weight: 700;
  color: #111827;
}

.page-subtitle {
  color: #6b7280;
}

/* Tables */
.table-iym thead th {
  background-color: #f9fafb;
  color: #6b7280;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 2px solid #e5e7eb;
  white-space: nowrap;
}

.table-iym tbody td {
  vertical-align: middle;
}

/* Forms */
.form-label-iym {
  color: #1f2937;
  font-weight: 600;
}

/* Footer */
.footer-iym {
  flex-shrink: 0;
  padding: 1.25rem 0;
  color: #9ca3af;
  font-size: 0.85rem;
  text-align: center;
}