/* TechNova Pro — fast, clean, pro look. System fonts only, no external scripts, no web fonts, no large images. */
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; line-height: 1.7; color: #17202a; background: #f7f9fc; }
a { color: #0b5fff; }
header { background: #0b1220; color: #fff; padding: 14px 16px; position: sticky; top: 0; }
header a { color: #fff; text-decoration: none; }
.nav { max-width: 900px; margin: 0 auto; display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.logo { font-size: 24px; font-weight: 900; letter-spacing: .3px; }
.logo span { color: #22c55e; }
.navlinks { margin-left: auto; display: flex; gap: 14px; font-size: 15px; }
main { max-width: 900px; margin: 0 auto; padding: 20px 16px 40px; }
.hero { background: linear-gradient(135deg, #0b1220, #123a2a); color: #fff; border-radius: 14px; padding: 28px 22px; }
.hero h1 { margin: 0 0 8px; font-size: 34px; line-height: 1.25; }
.hero p { margin: 0; opacity: .92; }
.hero .btn { margin-top: 14px; }
.btn { display: inline-block; background: #22c55e; color: #fff; padding: 10px 18px; border-radius: 8px; text-decoration: none; font-weight: 700; }
.filters { margin: 20px 0 0; display: flex; gap: 8px; flex-wrap: wrap; }
.filters button { border: 1px solid #d7dee8; background: #fff; border-radius: 20px; padding: 7px 14px; cursor: pointer; font-size: 14px; }
.filters button.active { background: #0b1220; color: #fff; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.card { background: #fff; border: 1px solid #e5e8ee; border-radius: 12px; padding: 18px; }
.card.featured { grid-column: 1 / -1; background: #eef6ff; }
.card h2 { margin: 0 0 6px; font-size: 20px; line-height: 1.4; }
.card h2 a { text-decoration: none; color: #0b1220; }
.meta { color: #666; font-size: 13px; margin: 0 0 8px; }
.tag { display: inline-block; background: #e6f7ec; color: #0a6b2d; border-radius: 20px; padding: 2px 10px; font-size: 13px; margin-right: 6px; }
.note { background: #fff8e1; border: 1px solid #ffe082; padding: 14px; border-radius: 10px; margin-top: 20px; }
h1 { font-size: 30px; line-height: 1.35; }
h2 { font-size: 22px; margin-top: 28px; }
footer { border-top: 1px solid #e5e8ee; padding: 18px; text-align: center; color: #666; font-size: 14px; background: #fff; }
@media (max-width: 640px) { .grid { grid-template-columns: 1fr; } .hero h1, h1 { font-size: 26px; } .navlinks { margin-left: 0; } }