:root {
  --color-red: #b3131f;
  --color-red-dark: #8a0f18;
  --color-red-light: #fbe9ea;
  --color-green: #146c34;
  --color-green-dark: #0f5228;
  --color-green-light: #e7f4ec;
  --color-black: #16181b;
  --color-white: #ffffff;
  --color-gray-50: #f7f8f9;
  --color-gray-100: #eef0f2;
  --color-gray-200: #dde1e5;
  --color-gray-300: #c4cad0;
  --color-gray-500: #7c8894;
  --color-gray-700: #444b52;
  --font-family-base: "Trebuchet MS", "Segoe UI", Verdana, Geneva, Tahoma, sans-serif;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(22, 24, 27, 0.08);
  --shadow-md: 0 4px 16px rgba(22, 24, 27, 0.10);
  --shadow-lg: 0 12px 32px rgba(22, 24, 27, 0.16);
  --sidebar-width: 250px;
  --header-height: 64px;
  --transition-base: 0.18s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 87.5%;
}

body {
  margin: 0;
  font-family: var(--font-family-base);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--color-black);
  background-color: var(--color-gray-50);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-base);
  font-weight: 700;
  color: var(--color-black);
  margin: 0 0 0.5em;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--color-red);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-red-dark);
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

hr {
  border: none;
  border-top: 1px solid var(--color-gray-200);
  margin: 1rem 0;
}

.text-red { color: var(--color-red) !important; }
.text-green { color: var(--color-green) !important; }
.text-muted { color: var(--color-gray-500) !important; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.w-100 { width: 100%; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

::selection {
  background: var(--color-red);
  color: var(--color-white);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: var(--radius-sm);
}