/* Erşen Press — site stilleri */
:root {
    --brand: #0c3a6b;
    --brand-600: #0f4886;
    --accent: #1c64c4;
    --accent-600: #1754a6;
    --ink: #0a1a2e;
    --ink-2: #10263f;
    --steel: #6b7078;
    --steel-2: #a3a9b1;
    --bg: #ffffff;
    --bg-alt: #f2f4f7;
    --line: #dfe4ea;
    --text: #1a2331;
    --muted: #5a6474;
    --radius: 10px;
    --shadow: 0 1px 2px rgba(10, 26, 46, .06), 0 8px 24px rgba(10, 26, 46, .08);
    --font: "Barlow", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --font-head: "Barlow Condensed", "Barlow", system-ui, sans-serif;
    --container: 1200px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font-family: var(--font);
    font-size: 17px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
[hidden] { display: none !important; }
a { color: var(--brand); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent); }
h1, h2, h3 { font-family: var(--font-head); line-height: 1.12; margin: 0 0 .5em; letter-spacing: .005em; color: var(--ink); }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -9999px; top: 8px; background: #fff; padding: 8px 14px; z-index: 100; }
.skip:focus { left: 8px; }

.icon { width: 1.15em; height: 1.15em; flex: none; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .5em;
    padding: .72em 1.3em; border-radius: 6px; border: 2px solid transparent;
    font-family: var(--font); font-weight: 600; font-size: 1rem; line-height: 1.2;
    text-decoration: none; cursor: pointer; transition: background .2s, color .2s, border-color .2s, transform .2s;
    white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn--lg { padding: .9em 1.6em; font-size: 1.05rem; }
.btn--accent { background: var(--accent); color: #fff; }
.btn--accent:hover { background: var(--accent-600); color: #fff; }
.btn--ghost { border-color: rgba(255, 255, 255, .55); color: #fff; }
.btn--ghost:hover { background: #fff; color: var(--ink); }
.btn--outline { border-color: var(--brand); color: var(--brand); }
.btn--outline:hover { background: var(--brand); color: #fff; }

.link-arrow { display: inline-flex; align-items: center; gap: .4em; font-weight: 600; text-decoration: none; }
.link-arrow .icon { transition: transform .2s; }
.link-arrow:hover .icon { transform: translateX(4px); }

.eyebrow {
    display: inline-flex; align-items: center; gap: .6em; margin: 0 0 .8em;
    font-size: .82rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--accent);
}
.eyebrow::before { content: ""; width: 28px; height: 2px; background: currentColor; }
.eyebrow--light { color: #9cc3f5; }

/* ---------- Topbar & header ---------- */
.topbar { background: var(--ink); color: #c9d2de; font-size: .88rem; }
.topbar__inner { display: flex; justify-content: space-between; gap: 16px; padding-top: 8px; padding-bottom: 8px; }
.topbar__right { display: flex; gap: 22px; }
.topbar__item { display: inline-flex; align-items: center; gap: .45em; color: inherit; text-decoration: none; }
a.topbar__item:hover { color: #fff; }

.header { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .97); border-bottom: 1px solid var(--line); backdrop-filter: saturate(1.4) blur(8px); }
.header.is-scrolled { box-shadow: 0 6px 20px rgba(10, 26, 46, .08); }
.header__inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 84px; }
.brand { display: block; flex: none; }
.brand img { height: 58px; width: auto; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav ul { display: flex; gap: 6px; list-style: none; margin: 0; padding: 0; }
.nav ul a {
    position: relative; display: block; padding: 10px 14px; font-weight: 600; color: var(--ink); text-decoration: none;
    font-size: 1rem; letter-spacing: .01em;
}
.nav ul a::after {
    content: ""; position: absolute; left: 14px; right: 14px; bottom: 4px; height: 2px; background: var(--accent);
    transform: scaleX(0); transform-origin: left; transition: transform .25s;
}
.nav ul a:hover::after, .nav ul a.is-active::after { transform: scaleX(1); }
.nav ul a.is-active { color: var(--brand); }

.nav-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 8px; background: #fff; cursor: pointer; padding: 0; }
.nav-toggle span { display: block; width: 20px; height: 2px; margin: 4px auto; background: var(--ink); transition: transform .25s, opacity .25s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
    position: relative; color: #fff; overflow: hidden;
    background: linear-gradient(100deg, rgba(8, 22, 40, .94) 0%, rgba(8, 22, 40, .82) 45%, rgba(8, 22, 40, .35) 100%), var(--hero) center / cover no-repeat, var(--ink);
}
.hero::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 6px;
    background: linear-gradient(90deg, var(--brand) 0 50%, var(--steel) 50% 100%);
}
.hero__inner { padding-top: clamp(80px, 12vw, 150px); padding-bottom: clamp(80px, 12vw, 150px); }
.hero__title { color: #fff; font-size: clamp(2.3rem, 5.4vw, 4.2rem); max-width: 15ch; margin-bottom: .35em; }
.hero__text { font-size: clamp(1.05rem, 1.6vw, 1.25rem); max-width: 52ch; color: #d4dce6; margin-bottom: 2em; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; }

.page-hero {
    position: relative; color: #fff; padding: clamp(56px, 8vw, 96px) 0;
    background: linear-gradient(90deg, rgba(8, 22, 40, .93), rgba(8, 22, 40, .7)), var(--hero) center / cover no-repeat, var(--ink);
}
.page-hero h1 { color: #fff; font-size: clamp(2.2rem, 5vw, 3.4rem); margin: 0; }
.breadcrumb { margin: 0 0 .5em; font-size: .92rem; color: #b6c2d1; }
.breadcrumb a { color: #fff; text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* ---------- Strip ---------- */
.strip { background: var(--bg); border-bottom: 1px solid var(--line); }
.strip__grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.strip__item { display: flex; align-items: center; gap: 14px; padding: 26px 20px; border-left: 1px solid var(--line); }
.strip__item:first-child { border-left: 0; padding-left: 0; }
.strip__item > .icon { width: 40px; height: 40px; padding: 9px; border-radius: 8px; background: #e8eff8; color: var(--brand); }
.strip__item strong { display: block; font-family: var(--font-head); font-size: 1.25rem; color: var(--ink); line-height: 1.2; }
.strip__item span { font-size: .92rem; color: var(--muted); }

/* ---------- Sections ---------- */
.section { padding: clamp(64px, 8vw, 104px) 0; }
.section--alt { background: var(--bg-alt); }
.section__title { font-size: clamp(1.9rem, 3.4vw, 2.6rem); }
.section__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 36px; flex-wrap: wrap; }
.section__head .section__title { margin: 0; }
.section__head--center { justify-content: center; text-align: center; }
.section__head--center .eyebrow { justify-content: center; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 72px); align-items: center; }
.split__media { position: relative; }
.split__media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: var(--radius); box-shadow: var(--shadow); }
.split__badge {
    position: absolute; left: 20px; bottom: 20px; display: flex; align-items: center; gap: 12px;
    padding: 14px 20px; border-radius: 8px; background: var(--brand); color: #fff; box-shadow: 0 10px 24px rgba(10, 26, 46, .25);
}
.split__badge strong { font-family: var(--font-head); font-size: 2.4rem; line-height: 1; }
.split__badge span { font-size: .9rem; line-height: 1.3; font-weight: 600; color: #d6e3f3; }
.split__body p { color: var(--muted); }
.split__body .link-arrow { margin-top: .4em; }

/* ---------- Products ---------- */
.products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.product {
    display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    overflow: hidden; transition: box-shadow .25s, transform .25s, border-color .25s;
}
.product:hover { box-shadow: var(--shadow); transform: translateY(-3px); border-color: #cdd6e1; }
.product__media { display: block; width: 100%; border: 0; padding: 18px; margin: 0; background: #fff; cursor: zoom-in; overflow: hidden; }
.product__media img { width: 100%; height: auto; aspect-ratio: 1; object-fit: contain; transition: transform .35s; }
.product:hover .product__media img { transform: scale(1.04); }
.product__body { display: flex; flex-direction: column; flex: 1; padding: 16px 18px 18px; border-top: 1px solid var(--line); }
.product__code {
    align-self: flex-start; font-family: var(--font-head); font-size: .9rem; font-weight: 700; letter-spacing: .06em;
    color: #fff; background: var(--brand); padding: 2px 10px; border-radius: 4px; margin-bottom: 10px;
}
.product__name { font-family: var(--font); font-size: 1.05rem; font-weight: 600; line-height: 1.35; margin: 0 0 14px; color: var(--ink); }
.product__qty {
    display: flex; align-items: center; gap: 8px; margin: auto 0 0; padding-top: 12px; border-top: 1px dashed var(--line);
    font-size: .92rem; color: var(--muted);
}
.product__qty .icon { color: var(--steel); }
.product__qty strong { margin-left: auto; color: var(--ink); font-size: 1rem; }

.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 28px; flex-wrap: wrap; }
.toolbar__count { margin: 0; color: var(--muted); }
.toolbar__count strong { color: var(--ink); }
.search { position: relative; flex: 0 1 380px; }
.search .icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--steel); }
.search input {
    width: 100%; padding: 12px 14px 12px 42px; font: inherit; font-size: 1rem; color: var(--text);
    border: 1px solid var(--line); border-radius: 8px; background: #fff;
}
.search input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(28, 100, 196, .15); }
.empty { text-align: center; color: var(--muted); padding: 48px 0; }
.note {
    display: flex; align-items: center; gap: 12px; margin: 40px 0 0; padding: 16px 20px; border-radius: var(--radius);
    background: var(--bg-alt); border-left: 4px solid var(--brand); color: var(--muted);
}
.note .icon { color: var(--brand); width: 24px; height: 24px; }

/* ---------- Vision / mission ---------- */
.vm { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.vm__card { position: relative; padding: clamp(28px, 4vw, 44px); background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.vm__card::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--brand); }
.vm__card h2 { font-size: 1.9rem; }
.vm__card p { color: var(--muted); font-size: 1.08rem; margin: 0; }
.vm__card--dark { background: var(--ink); border-color: var(--ink); }
.vm__card--dark::after { background: var(--steel-2); }
.vm__card--dark h2 { color: #fff; }
.vm__card--dark p { color: #c3cdd9; }
.vm__icon { display: inline-flex; width: 52px; height: 52px; align-items: center; justify-content: center; border-radius: 10px; background: #e8eff8; color: var(--brand); margin-bottom: 18px; }
.vm__icon .icon { width: 26px; height: 26px; }
.vm__card--dark .vm__icon { background: rgba(255, 255, 255, .08); color: #9cc3f5; }

.values { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.value { padding: 28px 24px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.value > .icon { width: 44px; height: 44px; padding: 10px; border-radius: 8px; background: var(--brand); color: #fff; margin-bottom: 16px; }
.value h3 { font-size: 1.35rem; margin-bottom: .3em; }
.value p { color: var(--muted); margin: 0; font-size: .98rem; }

/* ---------- CTA ---------- */
.cta { position: relative; color: #fff; background: linear-gradient(90deg, rgba(12, 58, 107, .96), rgba(10, 26, 46, .9)), var(--cta) center / cover no-repeat, var(--brand); }
.cta__inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding-top: 64px; padding-bottom: 64px; flex-wrap: wrap; }
.cta h2 { color: #fff; font-size: clamp(1.7rem, 3vw, 2.3rem); max-width: 22ch; }
.cta p { color: #c9d5e3; margin: 0; }
.cta__actions { display: flex; flex-wrap: wrap; gap: 14px; }
.cta .btn--accent { background: #fff; color: var(--brand); }
.cta .btn--accent:hover { background: #e8eff8; }

/* ---------- Contact ---------- */
.contact { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(32px, 5vw, 56px); align-items: stretch; }
.contact__list { list-style: none; margin: 8px 0 28px; padding: 0; }
.contact__list li { display: flex; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.contact__list li:last-child { border-bottom: 0; }
.contact__icon { display: inline-flex; width: 44px; height: 44px; flex: none; align-items: center; justify-content: center; border-radius: 8px; background: #e8eff8; color: var(--brand); }
.contact__list small { display: block; font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--steel); }
.contact__list a, .contact__list span, .contact__list strong { color: var(--ink); font-size: 1.05rem; text-decoration: none; }
.contact__list a:hover { color: var(--accent); }
.contact__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.contact__map { min-height: 420px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: var(--bg-alt); }
.contact__map iframe { width: 100%; height: 100%; min-height: 420px; border: 0; display: block; }

/* ---------- Footer ---------- */
.footer { background: var(--ink); color: #aab6c5; font-size: .96rem; }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1.4fr; gap: 40px; padding-top: 64px; padding-bottom: 48px; }
.footer__brand { font-family: var(--font-head); font-size: 1.8rem; font-weight: 700; color: #fff; margin-bottom: .4em; letter-spacing: .02em; }
.footer__muted { max-width: 44ch; }
.footer__title { color: #fff; font-weight: 700; text-transform: uppercase; letter-spacing: .12em; font-size: .82rem; margin-bottom: 1.1em; }
.footer__links, .footer__contact { list-style: none; margin: 0; padding: 0; }
.footer__links li { margin-bottom: .5em; }
.footer__contact li { display: flex; gap: 10px; margin-bottom: .75em; }
.footer__contact .icon { margin-top: .25em; color: #9cc3f5; }
.footer a { color: #d7dfe8; text-decoration: none; }
.footer a:hover { color: #fff; text-decoration: underline; }
.footer__bottom { border-top: 1px solid rgba(255, 255, 255, .08); font-size: .88rem; }
.footer__bottom-inner { display: flex; justify-content: space-between; gap: 12px; padding-top: 18px; padding-bottom: 18px; flex-wrap: wrap; }

.wa-float {
    position: fixed; right: 20px; bottom: 20px; z-index: 60; width: 56px; height: 56px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center; background: #25d366; color: #fff;
    box-shadow: 0 6px 20px rgba(0, 0, 0, .2); transition: transform .2s;
}
.wa-float:hover { transform: scale(1.08); color: #fff; }
.wa-float svg { width: 30px; height: 30px; }

/* ---------- Lightbox ---------- */
.lightbox { border: 0; padding: 0; background: transparent; max-width: min(92vw, 900px); max-height: 92vh; overflow: visible; }
.lightbox::backdrop { background: rgba(6, 14, 26, .86); }
.lightbox img { max-width: 100%; max-height: 80vh; margin: 0 auto; border-radius: 8px; background: #fff; }
.lightbox__caption { color: #fff; text-align: center; margin: 12px 0 0; font-weight: 600; }
.lightbox__close {
    position: absolute; top: -18px; right: -18px; width: 42px; height: 42px; border-radius: 50%; border: 0;
    background: #fff; color: var(--ink); font-size: 26px; line-height: 1; cursor: pointer; box-shadow: var(--shadow);
}

.notfound { text-align: center; }
.notfound__code { font-family: var(--font-head); font-size: clamp(5rem, 16vw, 9rem); font-weight: 700; line-height: 1; margin: 0; color: var(--line); }
.notfound .hero__actions { justify-content: center; margin-top: 24px; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
    .products { grid-template-columns: repeat(3, 1fr); }
    .values { grid-template-columns: repeat(2, 1fr); }
    .nav { gap: 16px; }
    .nav ul a { padding: 10px 10px; }
    .nav ul a::after { left: 10px; right: 10px; }
}

@media (max-width: 900px) {
    .topbar__inner > .topbar__item { display: none; }
    .topbar__right { width: 100%; justify-content: space-between; }
    .header__inner { min-height: 70px; }
    .brand img { height: 46px; }
    .nav-toggle { display: block; }
    .nav {
        position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0;
        background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 14px 24px rgba(10, 26, 46, .1);
        padding: 8px 20px 20px; display: none;
    }
    .nav.is-open { display: flex; }
    .nav ul { flex-direction: column; gap: 0; }
    .nav ul a { padding: 14px 4px; border-bottom: 1px solid var(--line); }
    .nav ul a::after { display: none; }
    .nav__cta { margin-top: 16px; }
    .strip__grid { grid-template-columns: repeat(2, 1fr); }
    .strip__item { padding: 20px 12px; border-left: 0; }
    .strip__item:first-child { padding-left: 12px; }
    .split, .vm, .contact { grid-template-columns: 1fr; }
    .split__badge { left: 12px; bottom: 12px; padding: 10px 14px; }
    .split__badge strong { font-size: 1.9rem; }
    .products { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .footer__grid { grid-template-columns: 1fr 1fr; }
    .footer__grid > :first-child { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
    body { font-size: 16px; }
    .container { padding-left: 16px; padding-right: 16px; }
    .cta__inner { padding-top: 48px; padding-bottom: 48px; gap: 24px; }
    .cta__actions { width: 100%; }
    .footer__grid { padding-top: 48px; gap: 32px; }
    .topbar__right a:last-child { display: none; }
    .brand img { height: 40px; }
    .strip__item { flex-direction: column; align-items: flex-start; gap: 8px; }
    .products { gap: 12px; }
    .product__media { padding: 10px; }
    .product__body { padding: 12px; }
    .product__name { font-size: .98rem; }
    .product__qty { flex-wrap: wrap; gap: 4px 8px; font-size: .85rem; }
    .values { grid-template-columns: 1fr; }
    .footer__grid { grid-template-columns: 1fr; }
    .hero__actions .btn, .cta__actions .btn { width: 100%; }
    .search { flex-basis: 100%; }
    .lightbox__close { top: 8px; right: 8px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

/* Ürün WhatsApp butonu */
.product__wa {
    display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 14px; padding: 10px 12px;
    border-radius: 6px; background: #25d366; color: #fff; font-weight: 600; font-size: .95rem; text-decoration: none; transition: background .2s;
}
.product__wa:hover { background: #1ebe5a; color: #fff; }
.product__wa .icon { width: 20px; height: 20px; }
.product:target { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(28, 100, 196, .25), var(--shadow); }
.product { scroll-margin-top: 110px; }
@media (max-width: 560px) {
    .product__wa { font-size: .88rem; padding: 9px 8px; gap: 6px; }
    .wa-float { right: 14px; bottom: 14px; width: 54px; height: 54px; }
}

/* SEO bölümü, SSS */
.page-hero__lead { margin: .8em 0 0; max-width: 60ch; color: #c9d3df; font-size: 1.08rem; }
.contact__lead { color: var(--muted); }
.seo { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 64px); align-items: start; }
.seo__text p { color: var(--muted); }
.checks { list-style: none; margin: 1.4em 0 0; padding: 0; display: grid; gap: 10px; }
.checks li { display: flex; gap: 10px; align-items: flex-start; font-weight: 600; color: var(--ink); }
.checks .icon { color: #fff; background: var(--brand); border-radius: 50%; padding: 3px; width: 22px; height: 22px; margin-top: 2px; }
.faq__title { font-size: 1.7rem; }
.faq__item { background: #fff; border: 1px solid var(--line); border-radius: 8px; margin-bottom: 10px; }
.faq__item summary {
    cursor: pointer; list-style: none; padding: 16px 48px 16px 18px; font-weight: 600; color: var(--ink); position: relative;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after { content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%); font-size: 1.4rem; color: var(--brand); }
.faq__item[open] summary::after { content: "–"; }
.faq__item[open] { border-color: #c5d3e4; }
.faq__item p { margin: 0; padding: 0 18px 16px; color: var(--muted); }
@media (max-width: 900px) { .seo { grid-template-columns: 1fr; } }