:root {
  --color-primary: #2AA7A1;
  --color-primary-soft: #3FB6AF;
  --color-primary-deep: #1E8E89;
  --color-secondary: #2F3E9E;
  --color-secondary-soft: #5060BC;
  --color-accent: #E45757;
  --color-accent-soft: #FFF1F1;
  --color-success: #2AA7A1;
  --color-info: #2F6EDB;
  --color-warning: #F2A94A;
  --color-surface: #FFFFFF;
  --color-surface-muted: #FBFDFE;
  --color-background: #F6FAFB;
  --color-border: #E6EEF1;
  --color-border-strong: #D2E2E8;
  --color-text: #1F2D3D;
  --color-text-muted: #6B7C93;
  --color-text-soft: #8C9AAE;
  --shadow-sm: 0 6px 18px rgba(20, 56, 74, 0.06);
  --shadow-md: 0 14px 36px rgba(22, 63, 84, 0.08);
  --shadow-lg: 0 24px 48px rgba(23, 69, 92, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --spacing-1: 8px;
  --spacing-2: 16px;
  --spacing-3: 24px;
  --spacing-4: 32px;
  --spacing-5: 48px;
  --container-width: 1200px;
  --transition-fast: 160ms ease;
  --transition-medium: 240ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", "Roboto", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--color-text);
  background:
    radial-gradient(circle at top right, rgba(63, 182, 175, 0.14), transparent 28%),
    radial-gradient(circle at top left, rgba(47, 62, 158, 0.08), transparent 20%),
    var(--color-background);
  line-height: 1.6;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

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

button,
input,
select,
textarea {
  font: inherit;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--spacing-2);
  color: var(--color-secondary);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 2.8rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.35rem, 2.2vw, 1.55rem);
  font-weight: 700;
}

h4 {
  font-size: 1.1rem;
  font-weight: 700;
}

p,
ul,
ol {
  margin: 0 0 var(--spacing-2);
}

ul,
ol {
  padding-left: 1.2rem;
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-3) 0;
}

code,
.mono {
  font-family: "SFMono-Regular", "SFMono", ui-monospace, Menlo, Monaco, Consolas, monospace;
  font-size: 0.92em;
  background: rgba(47, 62, 158, 0.06);
  color: var(--color-secondary);
  padding: 0.2rem 0.45rem;
  border-radius: 7px;
}

.muted {
  color: var(--color-text-muted);
}

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.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;
}