:root {
    --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --container-width: 1200px;
    --radius-xs: 12px;
    --radius-sm: 18px;
    --radius-md: 24px;
    --radius-lg: 32px;
    --shadow-sm: 0 10px 30px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 20px 60px rgba(0, 0, 0, 0.10);
    --shadow-lg: 0 28px 90px rgba(0, 0, 0, 0.14);
    --transition-fast: 180ms ease;
    --transition-medium: 280ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: inherit;
    text-decoration: none;
}

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

button {
    cursor: pointer;
    border: 0;
    background: none;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
figure {
    margin: 0;
}

ul,
ol {
    padding: 0;
}

.skip-link {
    position: absolute;
    left: 12px;
    top: -100px;
    z-index: 1000;
    padding: 10px 14px;
    border-radius: 999px;
    background: var(--color-surface);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

.skip-link:focus {
    top: 12px;
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 140ms; }
.reveal-delay-3 { transition-delay: 200ms; }