:root {
    --zk-green-900: #183F31;
    --zk-green-800: #234D36;
    --zk-green-700: #2F6B49;
    --zk-green-100: #E6EFE8;

    --zk-cream-50: #F8F6F0;
    --zk-white: #FFFFFF;

    --zk-text: #1F2A24;
    --zk-muted: #6F7A72;
    --zk-line: #D8DDD3;

    --zk-amber-600: #C98B2C;
    --zk-amber-100: #F6E6CC;

    --zk-info-100: #DDE8EA;

    --zk-radius-sm: 8px;
    --zk-radius-md: 14px;
    --zk-radius-lg: 22px;
    --zk-radius-pill: 999px;

    --zk-shadow-soft: 0 10px 30px rgba(24, 63, 49, 0.08);
    --zk-shadow-card: 0 4px 14px rgba(24, 63, 49, 0.06);

    --zk-font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --zk-font-technical: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    --zk-container: 1280px;
    --zk-section-space: clamp(48px, 6vw, 88px);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--zk-font-main);
    font-size: 17px;
    line-height: 1.65;
    color: var(--zk-text);
    background: var(--zk-cream-50);
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--zk-green-800);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.16em;
}

a:hover {
    color: var(--zk-green-700);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--zk-text);
    font-family: var(--zk-font-main);
    font-weight: 750;
    letter-spacing: -0.03em;
    line-height: 1.12;
    margin-top: 0;
}

h1 {
    font-size: clamp(34px, 4.4vw, 56px);
}

h2 {
    font-size: clamp(28px, 3.2vw, 40px);
}

h3 {
    font-size: clamp(22px, 2.2vw, 28px);
}

p {
    margin-top: 0;
}

img {
    max-width: 100%;
    height: auto;
}

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

::selection {
    background: var(--zk-green-100);
    color: var(--zk-green-900);
}