:root {
    --color-primary: #2e5bff;
    --color-primary-hover: #2850e0;
    --color-primary-pressed: #2244bf;
    --color-primary-100: #eaefff;
    --color-secondary: #0f172a;
    --color-accent: #ffb800;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-soft: #f5f7ff;
    --color-text: #0f172a;
    --color-muted: #4b515f;
    --color-border: #e7e8ea;
    --color-border-interactive: #878b94;
    --font-sans: "Plus Jakarta Sans", "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-heading: var(--font-sans);
    --container: 1200px;
    --content-width: 640px;
    --gutter: 24px;
    --header-height: 64px;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --shadow-card: 0 10px 30px rgb(15 23 42 / 6%);
    --shadow-soft: 0 20px 60px rgb(15 23 42 / 8%);
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 48px;
    --space-8: 64px;
    --space-9: 96px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 16px);
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font: 1.125rem/1.65 var(--font-sans);
    -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
a:hover { color: var(--color-primary); }

h1,
h2,
h3 {
    margin: 0 0 0.45em;
    color: var(--color-secondary);
    font-family: var(--font-heading);
    line-height: 1.1;
    letter-spacing: -0.025em;
}

h1 { font-size: clamp(2.5rem, 7vw, 5.5rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.5rem); }
p { margin: 0 0 1em; }

:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 3px;
    box-shadow: 0 0 0 5px rgb(255 255 255 / 92%);
}

.container {
    width: min(100% - (var(--gutter) * 2), var(--container));
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 100;
    padding: 12px 18px;
    transform: translateY(-180%);
    border-radius: var(--radius-sm);
    background: var(--color-secondary);
    color: white;
}

.skip-link:focus { transform: translateY(0); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    min-height: var(--header-height);
    border-bottom: 1px solid var(--color-border);
    background: rgb(255 255 255 / 90%);
    backdrop-filter: blur(16px);
}

.site-header__inner {
    min-height: var(--header-height);
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.site-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    text-decoration: none;
}

.site-brand__mark {
    display: grid;
    width: 36px;
    height: 36px;
    place-items: center;
    border-radius: 11px;
    background: var(--color-primary);
    color: white;
}

.primary-nav { margin-left: auto; }
.primary-nav ul,
.site-footer ul { margin: 0; padding: 0; list-style: none; }
.primary-nav ul { display: flex; align-items: center; gap: var(--space-5); }
.primary-nav a { min-height: 44px; display: inline-flex; align-items: center; font-weight: 650; text-decoration: none; }
.primary-nav a[aria-current="page"] { color: var(--color-primary); }

.nav-toggle {
    display: none;
    min-width: 44px;
    min-height: 44px;
    margin-left: auto;
    border: 1px solid var(--color-border-interactive);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
    font: inherit;
    font-weight: 700;
}

.button {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 22px;
    border: 0;
    border-radius: 12px;
    background: var(--color-primary);
    color: white;
    font: inherit;
    font-weight: 750;
    text-decoration: none;
    cursor: pointer;
}

.button:hover { background: var(--color-primary-hover); color: white; }
.button:active { background: var(--color-primary-pressed); }
.button--compact { min-height: 44px; padding-inline: 18px; }

.hero {
    padding: clamp(72px, 10vw, 128px) 0;
    background:
        radial-gradient(circle at 90% 10%, rgb(46 91 255 / 15%), transparent 36%),
        var(--color-bg);
}

.hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
    gap: clamp(40px, 7vw, 96px);
    align-items: center;
}

.hero__summary,
.page-header__summary {
    max-width: 700px;
    color: var(--color-muted);
    font-size: clamp(1.2rem, 2vw, 1.45rem);
}

.hero__panel {
    padding: clamp(28px, 4vw, 48px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
}

.eyebrow {
    margin-bottom: var(--space-3);
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.section { padding: clamp(64px, 8vw, 96px) 0; }
.section--surface { background: var(--color-surface); }
.section-heading { margin-bottom: var(--space-7); }

.prose {
    width: min(100% - (var(--gutter) * 2), var(--content-width));
    margin-inline: auto;
}

.prose a { color: var(--color-primary); text-underline-offset: 0.15em; }
.prose > * + * { margin-top: 1.2em; }

.page-header,
.article-header { max-width: 900px; margin-bottom: var(--space-7); }
.article-image { margin-bottom: var(--space-7); }
.article-image img { width: 100%; border-radius: var(--radius-lg); }

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-5);
}

.card {
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    box-shadow: var(--shadow-card);
}

.card__image { width: 100%; aspect-ratio: 18 / 11; object-fit: cover; }
.card__body { padding: var(--space-5); }
.card__title { font-size: 1.45rem; }
.card__title a { text-decoration: none; }

.search-form {
    max-width: 760px;
    margin-bottom: var(--space-6);
}

.search-form label { display: block; margin-bottom: var(--space-2); font-weight: 750; }
.search-form__row { display: flex; gap: var(--space-3); }
.search-form input {
    width: 100%;
    min-height: 48px;
    padding: 0 var(--space-4);
    border: 1px solid var(--color-border-interactive);
    border-radius: 12px;
    background: var(--color-surface);
    color: var(--color-text);
    font: inherit;
}

.result-list { display: grid; gap: var(--space-5); margin-top: var(--space-6); }
.result-list article { padding-bottom: var(--space-5); border-bottom: 1px solid var(--color-border); }

.empty-state { max-width: 720px; }

.site-footer {
    padding-top: var(--space-8);
    background: var(--color-secondary);
    color: rgb(255 255 255 / 74%);
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-7);
    padding-bottom: var(--space-7);
}

.site-footer__brand,
.site-footer h2 { color: white; }
.site-footer h2 { font-size: 1rem; }
.site-footer a { min-height: 44px; display: inline-flex; align-items: center; color: inherit; }
.site-footer__bar {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
    border-top: 1px solid rgb(255 255 255 / 14%);
    font-size: 0.9rem;
}

@media (max-width: 820px) {
    .hero__grid,
    .site-footer__grid { grid-template-columns: 1fr; }
    .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
    .primary-nav {
        position: absolute;
        inset: var(--header-height) 0 auto;
        display: none;
        padding: var(--space-4) var(--gutter) var(--space-5);
        border-bottom: 1px solid var(--color-border);
        background: var(--color-surface);
    }
    .primary-nav.is-open { display: block; }
    .primary-nav ul { display: grid; gap: var(--space-2); }
    .site-header .button--compact { display: none; }
}

@media (max-width: 560px) {
    :root { --gutter: 18px; }
    .card-grid { grid-template-columns: 1fr; }
    .search-form__row,
    .site-footer__bar { align-items: stretch; flex-direction: column; }
    .site-footer__bar { padding-block: var(--space-4); }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}