/* ==========================================================================
   Eska İnşaat & Karaoğlu — Premium Corporate Stylesheet (Light / White Theme)
   ========================================================================== */

:root {
  --c-bg: #ffffff;
  --c-bg-soft: #f8f6f1;
  --c-surface: #ffffff;
  --c-surface-soft: #f4f1e9;
  --c-border: #e8e3d6;
  --c-ink: #1c1b17;
  --c-body: #57544a;
  --c-muted: #7c7862;

  --c-gold: #a97c2d;
  --c-gold-light: #c9973f;
  --c-gold-dark: #8a611f;
  --c-gold-soft: #e9d4a6;
  --c-gold-wash: rgba(169, 124, 45, .08);

  --font-display: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --radius: 4px;
  --radius-lg: 8px;
  --container: 1240px;
  --shadow-card: 0 24px 48px -30px rgba(28, 27, 23, .22);
  --shadow-soft: 0 12px 30px -18px rgba(28, 27, 23, .14);
  --transition: 240ms cubic-bezier(.4,0,.2,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

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

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--c-ink);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 .6em;
  letter-spacing: .01em;
}

h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.9rem, 3.4vw, 2.6rem); }
h3 { font-size: 1.35rem; }

p { margin: 0 0 1em; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--c-gold);
  color: #fff;
  padding: 10px 16px;
  z-index: 999;
}
.skip-link:focus { left: 12px; top: 12px; }

section { padding: 88px 0; }
@media (max-width: 767px) { section { padding: 56px 0; } }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--c-gold);
  font-size: .78rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--c-gold);
}

.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; }

/* ---------------------------------- Buttons ---------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 30px;
  font-family: var(--font-body);
  font-size: .92rem;
  font-weight: 600;
  letter-spacing: .03em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn--gold {
  background: linear-gradient(135deg, var(--c-gold-soft), var(--c-gold));
  color: #211a0d;
  box-shadow: 0 14px 30px -16px rgba(169, 124, 45, .55);
}
.btn--gold:hover { filter: brightness(1.04); transform: translateY(-1px); }

.btn--outline {
  border-color: var(--c-gold);
  color: var(--c-gold-dark);
  background: transparent;
}
.btn--outline:hover { background: var(--c-gold-wash); }

.btn--ghost {
  border-color: var(--c-border);
  color: var(--c-ink);
  background: rgba(255,255,255,.6);
}
.btn--ghost:hover { border-color: var(--c-gold); color: var(--c-gold-dark); }

.btn--full { width: 100%; }

/* ---------------------------------- Header ---------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 14px 24px;
}
.brand { flex-shrink: 0; }
.brand__logo { height: 46px; width: auto; }

.main-nav { flex: 1; }
.main-nav ul {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
  justify-content: center;
}
.main-nav a {
  display: block;
  padding: 10px 16px;
  font-size: .92rem;
  font-weight: 500;
  color: var(--c-body);
  border-radius: var(--radius);
  transition: var(--transition);
  position: relative;
}
.main-nav a:hover, .main-nav a.is-active { color: var(--c-gold-dark); }
.main-nav a.is-active::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 1px;
  background: var(--c-gold);
}

.header-phone { flex-shrink: 0; padding: 10px 18px; font-size: .85rem; }

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  cursor: pointer;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--c-gold-dark);
  transition: var(--transition);
}
.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  max-height: 0;
  overflow: hidden;
  transition: max-height 320ms ease;
  border-top: 1px solid transparent;
  background: rgba(255,255,255,.98);
}
.mobile-nav.is-open { max-height: 480px; border-top-color: var(--c-border); }
.mobile-nav ul { list-style: none; margin: 0; padding: 8px 24px 20px; }
.mobile-nav a {
  display: block;
  padding: 13px 4px;
  font-size: 1rem;
  border-bottom: 1px solid var(--c-border);
  color: var(--c-body);
}
.mobile-nav__phone { color: var(--c-gold-dark) !important; font-weight: 600; border-bottom: none !important; }

@media (max-width: 960px) {
  .main-nav { display: none; }
  .header-phone { display: none; }
  .hamburger { display: flex; margin-left: auto; }
}

/* ---------------------------------- Hero ---------------------------------- */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #14120e;
}
.hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .62;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10,9,7,.45) 0%, rgba(10,9,7,.68) 55%, rgba(10,9,7,.92) 100%),
    linear-gradient(90deg, rgba(10,9,7,.82) 0%, rgba(10,9,7,.25) 60%);
}
.hero::after {
  content: 'ESKA';
  position: absolute;
  right: -3%;
  bottom: -10%;
  z-index: 1;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(9rem, 24vw, 22rem);
  line-height: .75;
  letter-spacing: -.02em;
  color: rgba(255,255,255,.055);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}
.hero__content { position: relative; z-index: 2; max-width: 760px; padding: 120px 0 80px; }
.hero__content h1 { color: #fff; margin-bottom: 22px; }
.hero__content p { font-size: 1.15rem; color: rgba(255,255,255,.82); max-width: 620px; margin-bottom: 36px; }
.hero__content .eyebrow { color: var(--c-gold-soft); }
.hero__content .eyebrow::before { background: var(--c-gold-soft); }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero .btn--ghost { border-color: rgba(255,255,255,.35); color: #fff; background: rgba(255,255,255,.08); backdrop-filter: blur(6px); }
.hero .btn--ghost:hover { border-color: var(--c-gold-soft); color: var(--c-gold-soft); }

.hero__stats {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,.18);
  flex-wrap: wrap;
}
.hero__stat strong { display: block; font-family: var(--font-display); font-size: 2.1rem; color: var(--c-gold-soft); }
.hero__stat span { font-size: .82rem; color: rgba(255,255,255,.65); letter-spacing: .04em; }

@media (max-width: 640px) {
  .hero { min-height: 78vh; }
  .hero__content { padding: 90px 0 50px; }
}

/* ---------------------------------- Page Hero (inner pages) ---------------------------------- */
.page-hero {
  position: relative;
  padding: 150px 0 70px;
  background: linear-gradient(160deg, var(--c-bg-soft), var(--c-bg) 70%);
  border-bottom: 1px solid var(--c-border);
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, var(--c-gold-wash), transparent 70%);
}
.page-hero::after {
  content: 'ESKA';
  position: absolute;
  left: 50%;
  bottom: -20%;
  transform: translateX(-50%);
  z-index: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(7rem, 19vw, 17rem);
  line-height: .75;
  letter-spacing: -.01em;
  color: var(--c-ink);
  opacity: .035;
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}
.page-hero__inner { position: relative; z-index: 1; }
.page-hero h1 { margin-bottom: 12px; }
.page-hero p { color: var(--c-muted); max-width: 640px; font-size: 1.05rem; }

.breadcrumbs {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0 0 22px;
  font-size: .85rem;
  color: var(--c-muted);
}
.breadcrumbs li { display: flex; align-items: center; gap: 8px; }
.breadcrumbs li:not(:last-child)::after { content: '/'; color: var(--c-border); }
.breadcrumbs a { color: var(--c-muted); transition: var(--transition); }
.breadcrumbs a:hover { color: var(--c-gold-dark); }
.breadcrumbs li:last-child { color: var(--c-gold-dark); }

/* ---------------------------------- Cards ---------------------------------- */
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  transition: var(--transition);
}

.grid {
  display: grid;
  gap: 28px;
}
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 960px) { .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid--3, .grid--4, .grid--2 { grid-template-columns: 1fr; } }

/* Service cards */
.service-card {
  padding: 36px 30px;
  position: relative;
}
.service-card:hover { border-color: var(--c-gold-soft); transform: translateY(-4px); box-shadow: var(--shadow-card); }
.service-card__icon {
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--c-gold-soft);
  background: var(--c-gold-wash);
  border-radius: 50%;
  color: var(--c-gold-dark);
  margin-bottom: 22px;
}
.service-card h3 { margin-bottom: 10px; font-size: 1.25rem; }
.service-card p { color: var(--c-muted); font-size: .95rem; margin-bottom: 0; }

/* Project cards */
.project-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform 150ms ease-out, box-shadow var(--transition), border-color var(--transition);
}
.project-card:hover { border-color: var(--c-gold-soft); box-shadow: var(--shadow-card); transform: translateY(-4px); }

.project-card__spotlight {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  border-radius: inherit;
  transition: opacity 300ms ease;
  background: radial-gradient(circle 260px at var(--mx, 50%) var(--my, 50%), rgba(233, 212, 166, .55), transparent 70%);
  mix-blend-mode: soft-light;
}
.project-card:hover .project-card__spotlight { opacity: 1; }

.project-card__media { position: relative; aspect-ratio: 4/3; overflow: hidden; }
.project-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 600ms ease; }
.project-card:hover .project-card__media img { transform: scale(1.06); }
.project-card__category {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(255,255,255,.85);
  border: 1px solid var(--c-gold-soft);
  color: var(--c-gold-dark);
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}
.project-card__body { padding: 26px 26px 28px; flex: 1; display: flex; flex-direction: column; }
.project-card__body h3 { margin-bottom: 10px; }
.project-card__body p { color: var(--c-muted); font-size: .93rem; flex: 1; }
.project-card__link {
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--c-gold-dark);
  font-size: .88rem;
  font-weight: 600;
  letter-spacing: .02em;
}
.project-card__link svg { transition: transform var(--transition); }
.project-card:hover .project-card__link svg { transform: translateX(4px); }

/* Neden Biz cards */
.why-card { padding: 30px 26px; text-align: left; }
.why-card__icon { color: var(--c-gold-dark); margin-bottom: 16px; }
.why-card h3 { font-size: 1.08rem; margin-bottom: 8px; }
.why-card p { font-size: .88rem; color: var(--c-muted); margin: 0; }

/* CTA band */
.cta-band {
  position: relative;
  background: linear-gradient(135deg, var(--c-bg-soft), var(--c-surface-soft));
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  text-align: center;
}
.cta-band h2 { margin-bottom: 14px; }
.cta-band p { color: var(--c-muted); max-width: 560px; margin: 0 auto 32px; }
.cta-band__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------------------------------- About / split sections ---------------------------------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 40px; } }

.split--2-1 { grid-template-columns: 2fr 1fr; margin-bottom: 56px; }
@media (max-width: 860px) { .split--2-1 { grid-template-columns: 1fr; } }

.split__visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/5;
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-card);
}
.split__visual img { width: 100%; height: 100%; object-fit: cover; }
.split__visual::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid var(--c-gold);
  outline: 1px solid var(--c-gold-wash);
  outline-offset: 14px;
  pointer-events: none;
}

.split__text p { color: var(--c-body); }
.split__text .lead { font-size: 1.1rem; color: var(--c-ink); }

/* Timeline */
.timeline { list-style: none; margin: 40px 0 0; padding: 0; display: grid; gap: 0; border-left: 1px solid var(--c-border); }
.timeline li { position: relative; padding: 0 0 32px 28px; }
.timeline li::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 4px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 0 4px var(--c-gold-wash);
}
.timeline strong { color: var(--c-gold-dark); display: block; font-family: var(--font-display); font-size: 1.2rem; }
.timeline span { color: var(--c-muted); font-size: .92rem; }

/* ---------------------------------- Project Detail / Gallery ---------------------------------- */
.project-hero {
  position: relative;
  aspect-ratio: 16/7;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
}
.project-hero img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 700px) { .project-hero { aspect-ratio: 4/3; } }

.project-meta {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  margin: 24px 0 44px;
  padding: 20px 26px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  background: var(--c-bg-soft);
}
.project-meta div span { display: block; font-size: .74rem; text-transform: uppercase; letter-spacing: .08em; color: var(--c-muted); margin-bottom: 4px; }
.project-meta div strong { color: var(--c-gold-dark); font-weight: 600; }

.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.gallery__item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: zoom-in;
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-soft);
}
.gallery__item img { width: 100%; height: 100%; object-fit: cover; transition: transform 500ms ease; }
.gallery__item:hover img { transform: scale(1.08); }
.gallery__item:nth-child(6n+1) { grid-row: span 2; aspect-ratio: auto; }
@media (max-width: 860px) { .gallery { grid-template-columns: repeat(2, 1fr); } .gallery__item:nth-child(6n+1) { grid-row: span 1; aspect-ratio: 4/3; } }
@media (max-width: 520px) { .gallery { grid-template-columns: 1fr; } }

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(6px);
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}
.lightbox.is-open { display: flex; }
.lightbox img { max-width: 100%; max-height: 84vh; border-radius: var(--radius); box-shadow: 0 30px 80px rgba(28,27,23,.25); }
.lightbox__close, .lightbox__prev, .lightbox__next {
  position: absolute;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  color: var(--c-ink);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition: var(--transition);
}
.lightbox__close:hover, .lightbox__prev:hover, .lightbox__next:hover { border-color: var(--c-gold); color: var(--c-gold-dark); }
.lightbox__close { top: 24px; right: 24px; }
.lightbox__prev { left: 24px; top: 50%; transform: translateY(-50%); }
.lightbox__next { right: 24px; top: 50%; transform: translateY(-50%); }
.lightbox__counter { position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); color: var(--c-muted); font-size: .85rem; }
@media (max-width: 640px) { .lightbox { padding: 16px; } .lightbox__prev, .lightbox__next { width: 38px; height: 38px; } }

/* ---------------------------------- FAQ ---------------------------------- */
.faq { max-width: 820px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--c-border);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  color: var(--c-ink);
  font-weight: 600;
  font-size: 1.02rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  color: var(--c-gold-dark);
  font-size: 1.4rem;
  font-weight: 400;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding: 0 4px 22px; color: var(--c-muted); margin: 0; }

/* ---------------------------------- Contact ---------------------------------- */
.contact-card { padding: 34px; }
.contact-info-item { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--c-border); }
.contact-info-item:last-child { border-bottom: none; }
.contact-info-item svg { color: var(--c-gold-dark); flex-shrink: 0; margin-top: 2px; }
.contact-info-item strong { display: block; color: var(--c-ink); margin-bottom: 4px; }
.contact-info-item span, .contact-info-item a { color: var(--c-muted); font-size: .95rem; }
.contact-info-item a:hover { color: var(--c-gold-dark); }

/* ---------------------------------- Footer ---------------------------------- */
.site-footer { background: var(--c-bg-soft); border-top: 1px solid var(--c-border); padding-top: 64px; }
.footer__inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
@media (max-width: 760px) { .footer__inner { grid-template-columns: 1fr; gap: 36px; } }
.footer__brand p { color: var(--c-muted); font-size: .92rem; margin: 18px 0 20px; max-width: 320px; }
.footer__social { display: flex; gap: 12px; }
.social-icon {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  border-radius: 50%;
  color: var(--c-body);
  transition: var(--transition);
}
.social-icon:hover { border-color: var(--c-gold); color: var(--c-gold-dark); }

.footer__col h3 { font-size: 1rem; color: var(--c-ink); margin-bottom: 18px; font-family: var(--font-body); letter-spacing: .04em; text-transform: uppercase; }
.footer__links { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.footer__links a { color: var(--c-muted); font-size: .93rem; transition: var(--transition); }
.footer__links a:hover { color: var(--c-gold-dark); }

.footer__bottom { border-top: 1px solid var(--c-border); padding: 20px 0; }
.footer__bottom-inner { display: flex; flex-direction: column; align-items: center; gap: 12px; font-size: .82rem; color: var(--c-muted); text-align: center; }

/* ---------------------------------- WhatsApp FAB ---------------------------------- */
.whatsapp-fab {
  position: fixed;
  bottom: 22px;
  right: 22px;
  width: 58px;
  height: 58px;
  background: #25D366;
  color: #06210f;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 30px rgba(28,27,23,.28);
  z-index: 200;
  transition: var(--transition);
}
.whatsapp-fab:hover { transform: scale(1.07); }

/* ---------------------------------- Misc ---------------------------------- */
.text-gold { color: var(--c-gold-dark); }
.gold-rule { width: 60px; height: 2px; background: linear-gradient(90deg, var(--c-gold), transparent); margin: 20px 0; }
.stack { display: grid; gap: 16px; }
.empty-state { text-align: center; padding: 60px 0; color: var(--c-muted); }