/* =========================================================
   nojanaj.com - site styles
   Colors and fonts come from the design system mockup.
   ========================================================= */

:root {
    /* Design system colors */
    --color-bg: #FFFFFF;
    --color-surface: #F7F8FA;
    --color-text: #111827;
    --color-primary: #2563EB;
    --color-accent: #94A3B8;

    /* Supporting shades */
    --color-primary-hover: #1D4ED8;
    --color-primary-soft: #EFF4FF;
    --color-text-muted: #4B5563;
    --color-text-subtle: #6B7280;
    --color-border: #E5E7EB;

    --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

    --radius-sm: 4px;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow-card: 0 1px 2px rgba(17, 24, 39, 0.04), 0 4px 16px rgba(17, 24, 39, 0.04);

    --container: 1200px;
    --gutter: 24px;
    --header-height: 72px;
}

/* ---------- Base ---------- */

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

html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-height) + 16px); }

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

body.menu-is-open { overflow: hidden; }

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

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }

h1, h2, h3, h4 { margin: 0; line-height: 1.2; letter-spacing: -0.02em; font-weight: 600; }

p { margin: 0; }

:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }

.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.section { margin-top: 64px; }

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

.icon { width: 1.25em; height: 1.25em; flex-shrink: 0; }

.skip-link {
    position: absolute; left: 8px; top: -48px; z-index: 100;
    padding: 8px 12px; background: var(--color-text); color: #fff; border-radius: var(--radius-sm);
}
.skip-link:focus { top: 8px; color: #fff; }

/* ---------- Buttons ---------- */

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 22px;
    border: 1.5px solid transparent; border-radius: var(--radius-sm);
    font: inherit; font-size: 15px; font-weight: 600; line-height: 1.2;
    cursor: pointer; white-space: nowrap;
    transition: background-color .15s, border-color .15s, color .15s;
}
.btn .icon { width: 16px; height: 16px; }
.btn-sm { padding: 8px 16px; font-size: 14px; }
.btn-block { display: flex; width: 100%; }

.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); color: #fff; }

.btn-dark { background: var(--color-text); color: #fff; }
.btn-dark:hover { background: #374151; color: #fff; }

.btn-outline { background: #fff; border-color: var(--color-text); color: var(--color-text); }
.btn-outline:hover { background: var(--color-surface); color: var(--color-text); }

.button-row { display: flex; flex-wrap: wrap; gap: 16px; }

.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-weight: 500; font-size: 15px; }
.link-arrow .icon { width: 16px; height: 16px; }

.icon-button {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; padding: 0;
    background: none; border: 0; border-radius: var(--radius);
    color: var(--color-text); cursor: pointer;
}
.icon-button:hover { background: var(--color-surface); color: var(--color-text); }

/* ---------- Header ---------- */

.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner { display: flex; align-items: center; gap: 32px; height: var(--header-height); }

.logo {
    display: inline-flex; align-items: baseline; gap: 6px;
    color: var(--color-text); font-weight: 700; font-size: 20px; letter-spacing: -0.02em;
}
.logo:hover { color: var(--color-text); }
.logo-slash { color: var(--color-primary); font-weight: 600; transform: skewX(-8deg); }

.main-nav { display: flex; gap: 36px; margin-left: auto; }
.main-nav a {
    position: relative; padding: 6px 0;
    color: var(--color-text); font-size: 15px; font-weight: 500;
}
.main-nav a:hover { color: var(--color-primary); }
.main-nav a.is-active::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
    height: 2px; background: var(--color-primary); border-radius: 2px;
}

.header-actions { display: flex; align-items: center; gap: 12px; margin-left: 24px; }

.menu-toggle { display: none; margin-left: auto; }
.menu-toggle .menu-close { display: none; }
.menu-toggle[aria-expanded="true"] .menu-open { display: none; }
.menu-toggle[aria-expanded="true"] .menu-close { display: inline-flex; }

.mobile-menu {
    position: fixed; inset: var(--header-height) 0 0 0;
    background: #fff; overflow-y: auto;
}
.mobile-menu nav { display: flex; flex-direction: column; padding-top: 24px; padding-bottom: 32px; }
.mobile-menu nav > a:not(.btn) {
    padding: 14px 0; color: var(--color-text); font-size: 18px; font-weight: 500;
}
.mobile-menu nav > a.is-active { color: var(--color-primary); }
.mobile-search {
    display: flex; align-items: center; gap: 10px;
    margin: 24px 0 16px; padding: 0 14px;
    border: 1px solid var(--color-border); border-radius: var(--radius);
    color: var(--color-text-subtle);
}
.mobile-search input {
    flex: 1; padding: 13px 0; border: 0; outline: 0; background: none;
    font: inherit; color: var(--color-text);
}

/* ---------- Hero ---------- */

.hero { position: relative; overflow: hidden; }
.hero-inner { position: relative; padding-top: 72px; padding-bottom: 56px; }
.hero-text { position: relative; z-index: 1; max-width: 640px; }

.eyebrow {
    margin-bottom: 20px;
    color: var(--color-text); font-size: 12px; font-weight: 600;
    letter-spacing: 0.16em; text-transform: uppercase;
}
.eyebrow span { margin: 0 6px; color: var(--color-text-subtle); }

.hero-title { font-size: clamp(36px, 5.5vw, 56px); font-weight: 700; letter-spacing: -0.03em; line-height: 1.1; }

.lead { margin: 24px 0 32px; max-width: 560px; color: var(--color-text-muted); font-size: 18px; line-height: 1.65; }

.decor-lines {
    position: absolute; top: 24px; right: var(--gutter);
    width: min(38vw, 420px); height: auto;
    stroke: var(--color-primary); stroke-width: 1; opacity: 0.45;
    pointer-events: none;
}

/* ---------- Topics row ---------- */

.topics {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
    margin: 0; padding: 32px 0; list-style: none;
    border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border);
}
.topics li { display: flex; align-items: center; gap: 14px; font-size: 15px; font-weight: 500; line-height: 1.35; }
.topics .icon { width: 32px; height: 32px; stroke-width: 1.4; color: var(--color-text); }

/* ---------- Section header ---------- */

.section-header { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
.section-header h2 { font-size: 28px; }

/* ---------- Article cards ---------- */

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.card {
    background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius);
    overflow: hidden; transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: var(--shadow-card); transform: translateY(-2px); }
.card-link { display: flex; flex-direction: column; height: 100%; color: inherit; }
.card-link:hover { color: inherit; }

.card-cover { aspect-ratio: 16 / 9; background: var(--color-surface); }
.card-cover img { width: 100%; height: 100%; object-fit: cover; }

.cover-placeholder { position: relative; overflow: hidden; }
.cover-0 { background: linear-gradient(135deg, #DCE6F5 0%, #9FB4D3 55%, #5F7BA6 100%); }
.cover-1 { background: linear-gradient(135deg, #1E293B 0%, #334155 50%, #2563EB 140%); }
.cover-2 { background: linear-gradient(160deg, #F1F5F9 0%, #CBD5E1 60%, #94A3B8 100%); }
.cover-placeholder::after {
    content: ""; position: absolute; inset: 0;
    background: repeating-linear-gradient(115deg, transparent 0 18px, rgba(255,255,255,.12) 18px 19px);
}

.card-body { display: flex; flex-direction: column; gap: 14px; flex: 1; padding: 18px 20px 20px; }
.card-title { font-size: 17px; line-height: 1.35; }
.card-link:hover .card-title { color: var(--color-primary); }

.meta {
    display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
    margin-top: auto; color: var(--color-text-subtle); font-size: 13px;
}
.meta .icon { width: 15px; height: 15px; }
.meta .dot { font-size: 10px; }

/* ---------- Call-to-action band ---------- */

.cta-band {
    display: flex; align-items: center; justify-content: space-between; gap: 32px;
    padding: 32px 36px;
    background: var(--color-primary-soft); border-radius: var(--radius-lg);
}
.cta-title { margin-bottom: 8px; font-size: 20px; }
.cta-band p { max-width: 560px; color: var(--color-text-muted); font-size: 15px; }

/* ---------- Footer ---------- */

.site-footer { margin-top: 96px; border-top: 1px solid var(--color-border); background: var(--color-surface); }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 32px; padding-top: 40px; padding-bottom: 32px; }
.footer-tagline { margin-top: 8px; color: var(--color-text-subtle); font-size: 14px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 28px; }
.footer-nav a { color: var(--color-text); font-size: 14px; font-weight: 500; }
.footer-nav a:hover { color: var(--color-primary); }
.footer-bottom { padding-top: 20px; padding-bottom: 32px; border-top: 1px solid var(--color-border); color: var(--color-text-subtle); font-size: 13px; }

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .topics { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 859px) {
    :root { --gutter: 20px; --header-height: 64px; }

    .main-nav, .header-actions { display: none; }
    .menu-toggle { display: inline-flex; }

    .hero-inner { padding-top: 40px; padding-bottom: 40px; }
    .decor-lines { width: 55vw; opacity: 0.25; }
    .lead { font-size: 16px; }

    .cta-band { flex-direction: column; align-items: flex-start; padding: 28px 24px; }
    .footer-inner { flex-direction: column; }
}

@media (max-width: 600px) {
    .card-grid { grid-template-columns: 1fr; }
    .topics { gap: 20px 16px; padding: 24px 0; }
    .topics li { font-size: 14px; gap: 10px; }
    .topics .icon { width: 26px; height: 26px; }
    .section { margin-top: 48px; }
    .section-header h2 { font-size: 24px; }

    /* Full-width buttons on phones, as in the mobile mockup */
    .hero .button-row { flex-direction: column; }
    .hero .button-row .btn { width: 100%; }
}