:root {
  --navy: #0f2742;
  --navy-2: #14395d;
  --ink: #192638;
  --muted: #607083;
  --gold: #c99a2e;
  --gold-text: #7a570c;
  --gold-2: #e8c66b;
  --paper: #f5f7fb;
  --line: #dce3ec;
  --white: #ffffff;
  --whatsapp: #137a43;
  --shadow: 0 18px 45px rgba(15, 39, 66, 0.12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #f8fafc; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.6; }
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
p, h1, h2, h3 { margin: 0; }
p { color: var(--muted); }
ul { margin: 0; padding-left: 1.2rem; color: var(--muted); }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.narrow { width: min(900px, calc(100% - 40px)); }
.skip-link { position: absolute; left: 16px; top: -64px; z-index: 1000; padding: 10px 14px; background: var(--gold); color: var(--navy); font-weight: 800; }
.skip-link:focus { top: 16px; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); }
.topline { background: var(--navy); color: var(--white); font-size: .88rem; }
.topline-inner { min-height: 36px; display: flex; align-items: center; justify-content: flex-end; gap: 22px; flex-wrap: wrap; }
.topline a:hover { color: var(--gold-2); }
.nav-shell { min-height: 78px; display: flex; align-items: center; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: max-content; margin-right: 8px; }
.brand-mark { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 8px; background: linear-gradient(135deg, var(--navy), var(--navy-2)); color: var(--gold-2); font-weight: 900; letter-spacing: 0; border: 1px solid rgba(201,154,46,.38); }
.brand strong { display: block; color: var(--navy); font-size: 1.08rem; line-height: 1.2; }
.brand small { display: block; color: var(--muted); font-size: .78rem; }
.site-nav { flex: 1; display: flex; align-items: center; justify-content: flex-end; gap: 3px; flex-wrap: nowrap; min-width: 0; }
.site-nav a { padding: 10px 8px; border-radius: 8px; color: #314256; font-size: .84rem; font-weight: 750; white-space: nowrap; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--navy); background: #eef3f8; }
.header-cta { min-width: max-content; padding: 10px 12px; border-radius: 8px; color: var(--navy); background: var(--gold); font-weight: 900; font-size: .84rem; }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 8px; background: var(--white); padding: 10px; }
.menu-toggle span { display: block; height: 2px; background: var(--navy); margin: 5px 0; }
.hero { position: relative; overflow: hidden; color: var(--white); background: linear-gradient(90deg, rgba(15,39,66,.96) 0%, rgba(15,39,66,.88) 46%, rgba(15,39,66,.44) 100%), url("yelken-patent-hero.png") center right / cover no-repeat; }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 22% 28%, rgba(232,198,107,.18), transparent 28%), linear-gradient(180deg, transparent 0%, rgba(6,18,31,.28) 100%); pointer-events: none; }
.hero-grid { position: relative; min-height: 660px; display: grid; grid-template-columns: minmax(0, 780px); align-items: center; padding: 96px 0 82px; }
.hero-content { max-width: 780px; }
.hero-media { display: none; }
.hero-proof { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 10px; margin-top: 34px; max-width: 780px; }
.hero-proof span { min-height: 82px; padding: 14px; border: 1px solid rgba(255,255,255,.22); border-radius: 8px; background: rgba(255,255,255,.1); color: rgba(255,255,255,.88); font-weight: 800; backdrop-filter: blur(10px); }
.hero-proof strong { display: block; color: var(--gold-2); font-size: .82rem; margin-bottom: 6px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--gold-text); font-size: .82rem; font-weight: 900; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 12px; }
.eyebrow::before { content: ""; width: 30px; height: 2px; background: currentColor; }
.hero .eyebrow, .page-hero .eyebrow, .final-cta .eyebrow { color: var(--gold-2); }
.hero h1, .page-hero h1 { font-size: clamp(2.35rem, 5vw, 5.25rem); line-height: 1.03; letter-spacing: 0; }
.hero p, .page-hero p { max-width: 680px; color: rgba(255,255,255,.86); font-size: 1.18rem; margin-top: 22px; }
.action-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 18px; border-radius: 8px; border: 1px solid transparent; font-weight: 900; line-height: 1.2; text-align: center; transition: transform .18s ease, box-shadow .18s ease; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 12px 26px rgba(15,39,66,.16); }
.btn-primary { background: var(--gold); color: var(--navy); }
.btn-secondary { background: rgba(255,255,255,.1); color: var(--white); border-color: rgba(255,255,255,.38); }
.btn-secondary.dark { color: var(--navy); border-color: var(--line); background: var(--white); margin-top: 10px; }
.btn-ghost { color: var(--white); border-color: rgba(255,255,255,.5); }
.btn-light { background: var(--white); color: var(--navy); }
.section { padding: 82px 0; background: var(--white); }
.section-soft { background: var(--paper); }
.intro-band { padding: 54px 0; border-bottom: 1px solid var(--line); }
.intro-grid, .split-layout, .trust-grid, .faq-grid, .contact-grid, .article-layout { display: grid; grid-template-columns: minmax(0,.92fr) minmax(0,1.28fr); gap: 54px; align-items: start; }
.intro-grid h2, .section-head h2, .contact-grid h2 { color: var(--navy); font-size: clamp(1.8rem, 3vw, 3rem); line-height: 1.12; letter-spacing: 0; }
.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head.compact { margin-bottom: 0; }
.section-head p, .contact-grid p { margin-top: 16px; font-size: 1.04rem; }
.cards-grid, .tiles-grid, .blog-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.service-card, .info-tile, .trust-item, .lead-form, .contact-cards > *, .faq-list details, .blog-card, .article-aside { border: 1px solid var(--line); border-radius: 8px; background: var(--white); }
.service-card, .blog-card { position: relative; min-height: 255px; padding: 28px; display: flex; flex-direction: column; gap: 14px; overflow: hidden; background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%); border-top: 3px solid var(--gold); box-shadow: 0 18px 38px rgba(15,39,66,.08); }
.service-card::after, .blog-card::after { content: ""; position: absolute; right: -34px; top: -38px; width: 105px; height: 105px; border-radius: 999px; background: rgba(201,154,46,.08); }
.service-card > *, .blog-card > * { position: relative; z-index: 1; }
.card-kicker, .blog-card span { color: var(--gold-text); font-weight: 900; }
.service-card h3, .info-tile h3, .trust-item h3, .blog-card h2 { color: var(--navy); font-size: 1.22rem; line-height: 1.24; }
.service-card a, .text-link { margin-top: auto; color: var(--navy-2); font-weight: 900; }
.process-list, .number-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.process-list li, .number-list li { display: grid; grid-template-columns: 52px 1fr; gap: 16px; align-items: start; padding: 18px; border-left: 4px solid var(--gold); background: var(--white); border-radius: 8px; box-shadow: 0 10px 24px rgba(15,39,66,.06); }
.process-list span, .number-list span { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 8px; background: var(--navy); color: var(--gold-2); font-weight: 900; }
.process-list strong { display: block; color: var(--navy); font-size: 1.08rem; margin-bottom: 4px; }
.trust-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.trust-item, .info-tile, .article-aside { padding: 24px; }
.tiles-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
.faq-list { display: grid; gap: 12px; }
.faq-list details { padding: 18px 20px; }
.faq-list summary { cursor: pointer; color: var(--navy); font-weight: 900; }
.faq-list p { margin-top: 12px; }
.lead-form { padding: 26px; box-shadow: var(--shadow); }
.compact-form { box-shadow: 0 10px 24px rgba(15,39,66,.08); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; margin-bottom: 18px; }
.lead-form label { display: grid; gap: 7px; }
.lead-form label.full { grid-column: 1 / -1; }
.lead-form span { color: var(--navy); font-weight: 850; font-size: .92rem; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
input, select, textarea { width: 100%; border: 1px solid #cfd8e3; border-radius: 8px; padding: 12px 13px; color: var(--ink); font: inherit; background: var(--white); }
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 3px solid rgba(201,154,46,.24); border-color: var(--gold); }
.form-note { min-height: 24px; margin-top: 12px; font-weight: 800; }
.form-note.ok { color: #176f42; }
.form-note.error { color: #a33a22; }
.estimate-box { margin: -4px 0 16px; padding: 13px 14px; background: #eef3f8; border: 1px solid var(--line); border-radius: 8px; color: var(--navy); font-weight: 850; }
.page-hero { padding: 96px 0; color: var(--white); background: linear-gradient(115deg, rgba(15,39,66,.98), rgba(20,57,93,.88)), url("yelken-patent-hero.png") center right / cover no-repeat; }
.lead-hero { background: linear-gradient(115deg, rgba(15,39,66,.98), rgba(24,74,116,.92)); }
.content-stack { display: grid; gap: 18px; }
.check-list { display: grid; gap: 10px; padding-left: 0; list-style: none; }
.check-list li { padding: 12px 14px; background: var(--paper); border: 1px solid var(--line); border-radius: 8px; color: var(--navy); font-weight: 800; }
.contact-cards { display: grid; gap: 12px; margin-top: 22px; }
.contact-cards > * { display: grid; gap: 4px; padding: 18px; }
.contact-cards strong { color: var(--gold-text); }
.contact-cards span { color: var(--navy); font-weight: 850; }
.map-box iframe { width: 100%; height: 420px; border: 0; border-radius: 8px; box-shadow: var(--shadow); }
.final-cta { padding: 70px 0; color: var(--white); background: linear-gradient(135deg, var(--navy), #184a74); }
.final-cta-inner { display: grid; gap: 16px; justify-items: start; }
.final-cta h2 { font-size: clamp(1.9rem, 3.4vw, 3.4rem); line-height: 1.12; }
.final-cta p { color: rgba(255,255,255,.82); }
.article-body { display: grid; gap: 22px; max-width: 780px; }
.article-body h2 { color: var(--navy); font-size: 1.8rem; line-height: 1.18; margin-top: 14px; }
.article-aside { position: sticky; top: 128px; }
.article-aside h2 { color: var(--navy); font-size: 1.4rem; }
.article-aside p { margin: 10px 0 16px; }
.site-footer { color: rgba(255,255,255,.78); background: #0b1b2d; padding: 58px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.15fr .8fr .8fr 1fr; gap: 34px; }
.footer-brand strong, .site-footer h2 { color: var(--white); }
.footer-brand .brand-mark { background: #122d4a; }
.site-footer p { color: rgba(255,255,255,.68); margin-top: 16px; }
.site-footer h2 { font-size: 1rem; margin-bottom: 14px; }
.site-footer a { display: block; color: rgba(255,255,255,.78); margin: 9px 0; }
.site-footer a:hover { color: var(--gold-2); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 28px; margin-top: 34px; border-top: 1px solid rgba(255,255,255,.14); font-size: .92rem; }
.whatsapp-float { position: fixed; right: 22px; bottom: 22px; z-index: 60; display: inline-flex; align-items: center; justify-content: center; min-height: 54px; padding: 0 18px; border-radius: 8px; background: var(--whatsapp); color: var(--white); font-weight: 900; box-shadow: 0 16px 34px rgba(10,78,43,.28); }
.mobile-action-bar { display: none; }
@media (max-width: 1160px) {
  .header-cta { display: none; }
  .site-nav { position: absolute; left: 20px; right: 20px; top: calc(100% + 1px); display: none; align-items: stretch; flex-direction: column; padding: 14px; background: var(--white); border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 12px 14px; }
  .menu-toggle { display: inline-block; }
}
@media (max-width: 900px) {
  .topline-inner { justify-content: center; gap: 12px; padding: 8px 0; }
  .hero { background-position: 62% center; }
  .hero-grid { min-height: auto; grid-template-columns: 1fr; padding: 74px 0 66px; }
  .intro-grid, .split-layout, .trust-grid, .faq-grid, .contact-grid, .article-layout, .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .cards-grid, .tiles-grid, .trust-list, .blog-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .article-aside { position: static; }
}
@media (max-width: 620px) {
  .container, .narrow { width: min(100% - 28px, 1180px); }
  .brand small { display: none; }
  .brand-mark { width: 42px; height: 42px; }
  .nav-shell { min-height: 68px; }
  .hero h1, .page-hero h1 { font-size: 2.28rem; }
  .hero p, .page-hero p { font-size: 1.02rem; }
  .action-row { align-items: stretch; flex-direction: column; }
  .hero-proof { grid-template-columns: 1fr; }
  .btn { width: 100%; }
  .form-grid { grid-template-columns: 1fr; }
  .process-list li, .number-list li { grid-template-columns: 44px 1fr; padding: 15px; }
  .whatsapp-float { display: none; }
  .mobile-action-bar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 70; display: grid; grid-template-columns: repeat(3, 1fr); background: var(--white); border-top: 1px solid var(--line); box-shadow: 0 -12px 30px rgba(15,39,66,.14); }
  .mobile-action-bar a { min-height: 54px; display: grid; place-items: center; color: var(--navy); font-weight: 900; border-right: 1px solid var(--line); }
  .mobile-action-bar a:nth-child(2) { background: var(--whatsapp); color: var(--white); }
  body { padding-bottom: 54px; }
}