/* =========================================================
   Ohmtek Mühendislik - Ana stil dosyası
   Yapı: 1) Değişkenler  2) Temel  3) Yerleşim  4) Bileşenler
         5) Bölümler     6) Sayfa özel  7) Responsive
   ========================================================= */

/* ---------- 1) Değişkenler ---------- */
:root {
  --c-bg: #ffffff;
  --c-bg-alt: #f4f7fb;
  --c-dark: #0b1220;
  --c-dark-2: #111a2e;
  --c-text: #1e293b;
  --c-muted: #64748b;
  --c-border: #e2e8f0;
  --c-primary: #14b8a6;      /* turkuaz - devre yeşili */
  --c-primary-dark: #0d9488;
  --c-accent: #a0573a;       /* logodaki bakır */

  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 23, 42, .08);
  --container: 1180px;
  --header-h: 72px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
}

/* ---------- 2) Temel ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--c-primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .6em; color: var(--c-dark); }
h1 { font-size: clamp(2rem, 5vw, 3.3rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); letter-spacing: -.01em; }
h3 { font-size: 1.15rem; }
p  { margin: 0 0 1em; }

/* ---------- 3) Yerleşim ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.section { padding: 88px 0; }
.section--alt { background: var(--c-bg-alt); }
.section--dark { background: var(--c-dark); color: #cbd5e1; }
.section--dark h2, .section--dark h3 { color: #fff; }

.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.split {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 56px;
  align-items: center;
}

/* ---------- 4) Bileşenler ---------- */

/* Bölüm başlığı: "01 / Hizmetler" etiketi */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--c-primary-dark);
  margin-bottom: 12px;
}
.section--dark .eyebrow, .hero .eyebrow, .page-hero .eyebrow { color: var(--c-primary); }

.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { color: var(--c-muted); font-size: 1.05rem; }
.section--dark .section-head p { color: #94a3b8; }

/* Butonlar */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  border: 2px solid transparent;
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .2s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn--primary { background: var(--c-primary); color: #04201d; }
.btn--primary:hover { background: #2dd4bf; }
.btn--ghost { border-color: rgba(255,255,255,.35); color: #fff; }
.btn--ghost:hover { border-color: #fff; }
.btn--outline { border-color: var(--c-primary); color: var(--c-primary-dark); }
.btn--outline:hover { background: var(--c-primary); color: #04201d; }

/* Kart */
.card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--c-primary); }
.card p { color: var(--c-muted); margin: 0; }
.card__icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: rgba(20, 184, 166, .1);
  margin-bottom: 18px;
}
.card__icon img { width: 28px; height: 28px; }
.card__link { display: inline-block; margin-top: 14px; font-weight: 600; }

.section--dark .card { background: var(--c-dark-2); border-color: #1e293b; }
.section--dark .card p { color: #94a3b8; }

/* İşaretli liste */
.check-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 30px; }
.check-list li::before {
  content: "";
  position: absolute; left: 0; top: .45em;
  width: 16px; height: 16px;
  border-radius: 4px;
  background: var(--c-primary) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2304201d' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5 9-10'/%3E%3C/svg%3E") center / 11px no-repeat;
}
.check-list--2col { grid-template-columns: repeat(2, 1fr); column-gap: 32px; }
/* Görsel kutu */
.media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border);
}
.site-header .container {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}

.logo { display: flex; align-items: center; }
.logo img { height: 40px; width: auto; }
.site-footer .logo img { height: 36px; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav__link {
  color: var(--c-text); padding: 8px 14px; border-radius: 8px; font-weight: 500; font-size: .95rem;
}
.nav__link:hover { color: var(--c-dark); text-decoration: none; background: var(--c-bg-alt); }
.nav__link.is-active { color: var(--c-primary-dark); font-weight: 600; }
.nav .btn { margin-left: 10px; padding: 10px 20px; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  background: none; border: 0; cursor: pointer;
  padding: 10px;
}
.nav-toggle span {
  display: block; height: 2px; background: var(--c-dark); border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.nav-toggle span + span { margin-top: 6px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- Footer ---------- */
.site-footer { background: var(--c-dark); color: #94a3b8; padding: 64px 0 24px; font-size: .95rem; }
.site-footer h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; }
.site-footer a { color: #94a3b8; }
.site-footer a:hover { color: var(--c-primary); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-bottom {
  margin-top: 48px; padding-top: 20px;
  border-top: 1px solid #1e293b;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: .85rem;
}

/* ---------- 5) Bölümler ---------- */

/* Ana sayfa hero: tam genişlik arka plan videosu */
.hero {
  position: relative;
  display: flex; align-items: center;
  min-height: calc(88vh - var(--header-h));
  min-height: calc(88svh - var(--header-h));
  padding: 96px 0;
  background: var(--c-dark);
  color: #cbd5e1;
  overflow: hidden;
  isolation: isolate;
}
.hero__video {
  position: absolute; inset: 0; z-index: -2;
  width: 100%; height: 100%;
  object-fit: cover; object-position: 60% center;
}
/* Yazıların okunması için soldan sağa koyulaşan katman */
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(90deg, rgba(11,18,32,.92) 0%, rgba(11,18,32,.78) 38%, rgba(11,18,32,.25) 70%, rgba(11,18,32,.1) 100%),
    linear-gradient(0deg, rgba(11,18,32,.6) 0%, transparent 35%);
}
.hero__content { max-width: 640px; }
.hero h1 { color: #fff; text-shadow: 0 2px 24px rgba(0,0,0,.35); }
.hero h1 em { font-style: normal; color: var(--c-primary); }
.hero__lead { font-size: 1.15rem; color: #e2e8f0; max-width: 560px; margin-bottom: 32px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero__points {
  display: flex; flex-wrap: wrap; gap: 10px 24px;
  list-style: none; padding: 0; margin: 40px 0 0;
  font-size: .9rem; color: #cbd5e1;
}
.hero__points li { display: flex; align-items: center; gap: 8px; }
.hero__points li::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: var(--c-primary); box-shadow: 0 0 0 4px rgba(20,184,166,.2);
}
/* Kart görsel başlığı: koyu ızgara zemin + büyük ikon.
   Gerçek fotoğraf gelince <div class="visual">...</div> yerine
   <img class="visual" src="assets/img/dosya.jpg" alt="..."> yazın. */
.visual {
  display: grid; place-items: center;
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
  background:
    radial-gradient(circle at 70% 30%, rgba(20,184,166,.22), transparent 60%),
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--c-dark);
}
.visual img { width: 64px; height: 64px; opacity: .9; }

/* Proje / çözüm kartı */
.project { position: relative; display: flex; flex-direction: column; padding: 0; overflow: hidden; }
.project__body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.project__cat {
  font-family: var(--font-mono); font-size: .75rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase; color: var(--c-primary-dark);
  margin-bottom: 8px;
}

/* Hizmet sütunu */
.service__label {
  font-family: var(--font-mono); font-size: .75rem; font-weight: 700;
  letter-spacing: .1em; color: var(--c-primary-dark); margin-bottom: 6px;
}


.note { color: var(--c-muted); font-size: .9rem; margin-top: 32px; }

/* CTA */
.cta {
  background: linear-gradient(135deg, var(--c-primary-dark), #0f766e);
  border-radius: 22px;
  padding: 56px;
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  color: #ccfbf1;
}
.cta h2 { color: #fff; margin-bottom: 8px; }
.cta p { margin: 0; }
.cta .btn { background: #fff; color: var(--c-dark); flex-shrink: 0; }

/* Alt sayfa hero */
.page-hero {
  background:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px) 0 0 / 32px 32px,
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px) 0 0 / 32px 32px,
    var(--c-dark);
  color: #cbd5e1;
  padding: 72px 0 64px;
}
.page-hero h1 { color: #fff; }
.page-hero p { max-width: 680px; font-size: 1.1rem; margin: 0; }
.breadcrumb { font-size: .85rem; margin-bottom: 18px; color: #64748b; }
.breadcrumb a { color: #94a3b8; }

/* ---------- 6) Sayfa özel ---------- */

/* İletişim */
.contact-info { display: grid; gap: 18px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-item strong { display: block; color: var(--c-dark); }
.contact-item span { color: var(--c-muted); }

.form { display: grid; gap: 18px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 6px; }
.form input, .form select, .form textarea {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--c-border);
  border-radius: 10px;
  font: inherit;
  font-size: 16px; /* iOS'ta otomatik zoom'u engeller */
  background: var(--c-bg);
  color: var(--c-text);
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(20,184,166,.2);
}
.form textarea { min-height: 140px; resize: vertical; }
.form .is-invalid { border-color: #ef4444; }
.form__note { font-size: .85rem; color: var(--c-muted); margin: 0; }
.form__status { font-weight: 600; margin: 0; }
.form__status.is-ok { color: var(--c-primary-dark); }
.form__status.is-error { color: #ef4444; }


/* Kaydırınca beliren animasyon */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s, transform .6s; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 7) Responsive ---------- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  /* Mobil menü */
  .nav-toggle { display: block; }
  .nav {
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    padding: 16px 20px 24px;
    background: var(--c-bg);
    border-bottom: 1px solid var(--c-border);
    box-shadow: var(--shadow);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity .25s, transform .25s, visibility .25s;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav__link { padding: 12px 14px; font-size: 1.05rem; }
  .nav .btn { margin: 10px 0 0; justify-content: center; }

  .split { grid-template-columns: 1fr; gap: 40px; }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .cta { flex-direction: column; align-items: flex-start; padding: 40px 28px; }
  .hero { padding: 72px 0; min-height: 0; }
  /* Mobilde yazı tüm genişliği kapladığı için katman daha eşit */
  .hero::before { background: linear-gradient(180deg, rgba(11,18,32,.55) 0%, rgba(11,18,32,.85) 100%); }
}

@media (max-width: 600px) {
  .section { padding: 64px 0; }
  .grid--2, .grid--3, .grid--4, .footer-grid,
  .check-list--2col, .form__row { grid-template-columns: 1fr; }
  .hero__actions .btn { flex: 1 1 100%; justify-content: center; }
  .card:not(.project) { padding: 22px; }
}

/* ---------- Yardımcı sınıflar ---------- */
.section--flush-top { padding-top: 0; }
.footer-about { margin-top: 16px; }
.contact-item .card__icon { margin: 0; flex-shrink: 0; }
.free-badge {
  margin-top: 28px; padding: 18px 20px;
  border-radius: 12px; background: rgba(20,184,166,.1);
  border: 1px solid rgba(20,184,166,.35);
  font-weight: 600; color: var(--c-dark);
}
section[id] { scroll-margin-top: var(--header-h); }
.form .btn { justify-content: center; }



/* Kart altı açılır detay (<details>) */
.more { margin-top: auto; border-top: 1px solid var(--c-border); padding-top: 14px; }
.more summary {
  display: flex; justify-content: space-between; align-items: center;
  cursor: pointer; list-style: none;
  font-weight: 600; font-size: .9rem; color: var(--c-primary-dark);
}
.more summary::-webkit-details-marker { display: none; }
.more summary::after { content: "+"; font-size: 1.2rem; line-height: 1; }
.more[open] summary::after { content: "−"; }
/* Açılan detay kartın üzerine panel olarak gelir; kart boyu değişmez */
.more ul {
  position: absolute; top: 0; left: 0; right: 0; bottom: 56px;
  margin: 0; padding: 28px 28px 20px 44px;
  display: flex; flex-direction: column; gap: 10px;
  overflow-y: auto;
  background: var(--c-dark); color: #cbd5e1; font-size: .92rem;
}
/* Dikey ortalama (içerik taşarsa üstten kesilmez) */
.more ul li:first-child { margin-top: auto; }
.more ul li:last-child { margin-bottom: auto; }
.more ul li::marker { color: var(--c-primary); }
.project__body > p { margin-bottom: 20px; }

/* Referans logoları (gerçek müşteri gelince bölümden hidden kaldırılır) */
.ref-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; }
.ref-grid img {
  width: 100%; height: 80px; object-fit: contain;
  padding: 16px; border: 1px solid var(--c-border); border-radius: 12px;
  filter: grayscale(1); opacity: .75; transition: filter .2s, opacity .2s;
}
.ref-grid img:hover { filter: none; opacity: 1; }
/* Tüm kartlar eşit boyutta */
.grid--equal { grid-auto-rows: 1fr; }
@media (max-width: 600px) { .site-header .logo img { height: 32px; } }
@media (max-width: 600px) { .grid--equal { grid-auto-rows: auto; } }

/* =========================================================
   Çalışma süreci akışı (js/flow.js tarafından çizilir)
   Masaüstünde yatay, mobilde dikey; adımlar oklu çizgiyle bağlı
   ========================================================= */
.flow {
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 28px;
}
.flow__step { position: relative; }
.flow__num {
  position: relative; z-index: 1;
  display: grid; place-items: center;
  width: 56px; height: 56px; border-radius: 50%;
  margin-bottom: 22px;
  background: var(--c-dark); color: #fff;
  font-family: var(--font-mono); font-weight: 700;
  box-shadow: 0 0 0 6px rgba(20, 184, 166, .15);
}
.flow__step:last-child .flow__num { background: var(--c-primary); color: #04201d; }
.flow__step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.flow__step p { font-size: .93rem; color: var(--c-muted); margin: 0; }

/* Bağlantı çizgisi ve ok başı (son adım hariç) */
.flow__step:not(:last-child)::after {
  content: ""; position: absolute;
  top: 27px; left: 70px; right: -16px; height: 2px;
  background: linear-gradient(90deg, var(--c-primary), rgba(20, 184, 166, .35));
}
.flow__step:not(:last-child)::before {
  content: ""; position: absolute; top: 22px; right: -22px;
  border: 6px solid transparent; border-left: 8px solid rgba(20, 184, 166, .6); border-right: 0;
}

/* Tablet ve mobil: dikey akış */
@media (max-width: 860px) {
  .flow { grid-template-columns: 1fr; gap: 0; }
  .flow__step { padding: 0 0 32px 80px; min-height: 56px; }
  .flow__step:last-child { padding-bottom: 0; }
  .flow__num { position: absolute; left: 0; top: 0; margin: 0; }
  .flow__step h3 { padding-top: 14px; }
  .flow__step:not(:last-child)::after {
    top: 66px; bottom: 10px; left: 27px; right: auto; width: 2px; height: auto;
    background: linear-gradient(180deg, var(--c-primary), rgba(20, 184, 166, .35));
  }
  .flow__step:not(:last-child)::before {
    top: auto; bottom: 2px; right: auto; left: 22px;
    border: 6px solid transparent; border-top: 8px solid rgba(20, 184, 166, .6); border-bottom: 0;
  }
}

/* =========================================================
   Hizmet detayı (hizmetler.html): solda giriş, sağda liste + teknik tablo
   ========================================================= */
.service-detail {
  display: grid; grid-template-columns: .85fr 1.15fr; gap: 56px;
  padding: 56px 0;
  border-top: 1px solid var(--c-border);
}
.service-detail:first-child { padding-top: 0; border-top: 0; }
.service-detail:last-child { padding-bottom: 0; }
.service-detail__intro { position: sticky; top: calc(var(--header-h) + 24px); align-self: start; }
.service-detail__intro h2 { margin-top: 4px; }
.service-detail__intro p { color: var(--c-muted); }
.service-detail__body { display: grid; gap: 32px; }
.service-detail__body h3 { font-size: 1.05rem; margin-bottom: 14px; }

/* Teknik kapsam tablosu */
.spec { margin: 0; border: 1px solid var(--c-border); border-radius: 12px; overflow: hidden; }
.spec div { display: grid; grid-template-columns: 170px 1fr; }
.spec div + div { border-top: 1px solid var(--c-border); }
.spec dt { padding: 12px 16px; background: var(--c-bg-alt); font-weight: 600; font-size: .9rem; color: var(--c-dark); }
.spec dd { padding: 12px 16px; margin: 0; font-size: .92rem; color: var(--c-text); }

@media (max-width: 860px) {
  .service-detail { grid-template-columns: 1fr; gap: 28px; }
  .service-detail__intro { position: static; }
}
@media (max-width: 600px) {
  .spec div { grid-template-columns: 1fr; }
  .spec dt { padding-bottom: 6px; }
  .spec dd { padding-top: 6px; }
}
/* Ana sayfa hizmet kartı: link kartın dibinde */
.service-card { display: flex; flex-direction: column; }
.service-card .card__link { margin-top: auto; padding-top: 14px; }

/* Yetkinlikler altındaki teknoloji şeridi (ana sayfa) */
.tech {
  margin-top: 40px; padding: 24px 28px;
  border: 1px solid var(--c-border); border-radius: var(--radius);
  background: var(--c-bg-alt);
  display: grid; gap: 16px;
}
.tech__row { display: grid; grid-template-columns: 130px 1fr; align-items: center; gap: 16px; }
.tech__label { font-weight: 700; font-size: .9rem; color: var(--c-dark); }
.tech__list { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tech__list li {
  padding: 6px 14px; border-radius: 999px;
  background: var(--c-bg); border: 1px solid var(--c-border);
  font-size: .88rem; font-weight: 500; color: var(--c-text);
}
@media (max-width: 600px) {
  .tech { padding: 20px; }
  .tech__row { grid-template-columns: 1fr; gap: 10px; }
}