/* ============================================================
   Kent Gelişim A.Ş. — Kurumsal Web Sitesi
   Renk paleti: Siyah / Beyaz + logodaki yeşil tonları
   ============================================================ */

:root {
  /* Yeşil tonları (logodan) */
  --green: #45a83f;          /* logo kutu yeşili */
  --green-dark: #2f7d2f;     /* logo "gelişim" metin yeşili */
  --green-darker: #1f5a20;
  --green-soft: #eaf5ea;     /* açık yeşil zemin */
  --green-glow: rgba(69, 168, 63, 0.18);

  /* Siyah - beyaz - gri */
  --ink: #101312;           /* neredeyse siyah */
  --ink-2: #1b201e;
  --gray-900: #22271f;
  --gray-700: #4a4f4a;
  --gray-500: #7d827c;
  --gray-300: #c9cdc7;
  --gray-100: #f2f4f1;
  --white: #ffffff;

  --bg: #ffffff;
  --text: #1c211c;
  --muted: #6a706a;
  --line: #e6e9e4;

  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgba(16, 19, 18, 0.08);
  --shadow-lg: 0 24px 60px rgba(16, 19, 18, 0.14);
  --max: 1200px;
  --nav-h: 76px;

  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

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

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

h1, h2, h3, h4 { line-height: 1.2; color: var(--ink); font-weight: 700; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1rem; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }

section { padding: 84px 0; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--green-dark);
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--green); display: inline-block; }

.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head.center .eyebrow::before { display: none; }
.section-head p { color: var(--muted); font-size: 1.05rem; }

/* ---------- Butonlar ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: .98rem;
  border: 1.5px solid transparent; cursor: pointer; transition: .2s ease;
}
.btn-primary { background: var(--green); color: #fff; box-shadow: 0 8px 20px var(--green-glow); }
.btn-primary:hover { background: var(--green-dark); transform: translateY(-2px); }
.btn-ghost { border-color: var(--gray-300); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--green); color: var(--green-dark); }
.btn-light { background: #fff; color: var(--ink); }
.btn-light:hover { background: var(--green); color: #fff; }
.btn-outline-light { border-color: rgba(255,255,255,.5); color: #fff; }
.btn-outline-light:hover { background: #fff; color: var(--ink); }

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.35rem; letter-spacing: -.02em; }
.brand .b-kent { color: var(--gray-700); }
.brand .b-g { background: var(--green); color: #fff; padding: 0 6px; border-radius: 5px; }
.brand .b-elisim { color: var(--green-dark); }
.brand small { display: block; font-size: .58rem; font-weight: 600; letter-spacing: .18em; color: var(--muted); text-transform: uppercase; margin-top: -4px; }
.brand-logo { height: 36px; width: auto; display: block; }
.brand-logo-foot { height: 30px; width: auto; display: block; margin-bottom: 14px; }
@media (max-width: 480px){ .brand-logo { height: 30px; } }

.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  padding: 9px 15px; border-radius: 999px; font-weight: 500; font-size: .96rem; color: var(--gray-700);
  transition: .18s;
}
.nav-links a:hover { color: var(--green-dark); background: var(--green-soft); }
.nav-links a.active { color: var(--green-dark); font-weight: 600; }
.nav-cta { margin-left: 8px; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; transition: .25s; border-radius: 2px; }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 12px 16px 20px; box-shadow: var(--shadow);
    transform: translateY(-140%); transition: transform .3s ease; z-index: -1;
  }
  .nav.open .nav-links { transform: translateY(0); }
  .nav-links a { padding: 14px 12px; border-radius: 10px; }
  .nav-cta { margin: 8px 0 0; }
  .nav.open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav.open .nav-toggle span:nth-child(2) { opacity: 0; }
  .nav.open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background:
    radial-gradient(1100px 500px at 80% -10%, rgba(69,168,63,.35), transparent 60%),
    linear-gradient(160deg, #0c0f0d 0%, #12201a 55%, #0c0f0d 100%);
  padding: clamp(72px, 12vw, 130px) 0;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 48px 48px; mask-image: radial-gradient(circle at 70% 30%, #000, transparent 75%);
}
.hero .container { position: relative; z-index: 1; max-width: 860px; }
.hero .eyebrow { color: #8fe08a; }
.hero .eyebrow::before { background: #8fe08a; }
.hero h1 { color: #fff; }
.hero h1 .accent { color: #7ed977; }
.hero p.lead { font-size: 1.2rem; color: #d7ded8; max-width: 640px; margin-bottom: 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
  margin-top: 64px; padding-top: 34px; border-top: 1px solid rgba(255,255,255,.14);
}
.hero-stats .num { font-size: 2.2rem; font-weight: 800; color: #fff; }
.hero-stats .num span { color: #7ed977; }
.hero-stats .lbl { font-size: .85rem; color: #aab3ac; }
@media (max-width: 700px) { .hero-stats { grid-template-columns: repeat(2, 1fr); } }

/* Sayfa başlığı (iç sayfalar) */
.page-hero {
  color: #fff; padding: 88px 0 74px; position: relative; overflow: hidden;
  background:
    radial-gradient(800px 340px at 85% 0%, rgba(69,168,63,.3), transparent 60%),
    linear-gradient(160deg, #0c0f0d, #12201a);
}
.page-hero h1 { color: #fff; }
.page-hero p { color: #cfd6d0; max-width: 640px; margin: 0; }
.breadcrumb { font-size: .85rem; color: #90cf8b; margin-bottom: 14px; letter-spacing: .04em; }
.breadcrumb a:hover { color: #fff; }

/* ============================================================
   GENEL BÖLÜM BİLEŞENLERİ
   ============================================================ */
.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); }
@media (max-width: 980px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* Kart */
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; transition: .25s ease; height: 100%;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #d7ecd4; }
.card .icon {
  width: 52px; height: 52px; border-radius: 12px; display: grid; place-items: center;
  background: var(--green-soft); color: var(--green-dark); margin-bottom: 18px;
}
.card .icon svg { width: 26px; height: 26px; }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--muted); margin: 0; font-size: .96rem; }
.card .more { display: inline-block; margin-top: 14px; color: var(--green-dark); font-weight: 600; font-size: .9rem; }
.card .more::after { content: " →"; transition: .2s; }
.card:hover .more::after { margin-left: 4px; }

/* Alternatif koyu bölüm */
.section-dark { background: var(--ink); color: #dfe4df; }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark .eyebrow { color: #8fe08a; }
.section-dark p { color: #b7beb7; }

/* Açık gri bölüm */
.section-alt { background: var(--gray-100); }

/* ---------- İki kolon içerik ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 34px; } }
.split .media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.check-list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 12px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; color: var(--gray-700); }
.check-list li::before {
  content: "✓"; flex: 0 0 22px; width: 22px; height: 22px; border-radius: 50%;
  background: var(--green); color: #fff; font-size: .75rem; font-weight: 700;
  display: grid; place-items: center; margin-top: 3px;
}

/* ---------- İstatistik şeridi ---------- */
.stat-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat-strip .num { font-size: 2.6rem; font-weight: 800; color: var(--green-dark); line-height: 1; }
.stat-strip .lbl { color: var(--muted); font-size: .92rem; margin-top: 8px; }
@media (max-width: 700px) { .stat-strip { grid-template-columns: repeat(2, 1fr); gap: 30px 20px; } }

/* ---------- Referanslar / logolar ---------- */
.ref-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 900px) { .ref-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px) { .ref-grid { grid-template-columns: repeat(2, 1fr); } }
.ref-item {
  display: flex; align-items: center; gap: 12px; padding: 20px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-weight: 600; color: var(--gray-700); font-size: .92rem; transition: .2s;
}
.ref-item:hover { border-color: var(--green); color: var(--green-dark); box-shadow: var(--shadow); }
.ref-item .seal {
  flex: 0 0 40px; width: 40px; height: 40px; border-radius: 50%;
  background: var(--green-soft); color: var(--green-dark);
  display: grid; place-items: center; font-weight: 800; font-size: 1rem;
}

/* ---------- Projeler ---------- */
.project-card {
  border-radius: var(--radius); overflow: hidden; background: #fff;
  border: 1px solid var(--line); transition: .25s; display: flex; flex-direction: column;
}
.project-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.project-thumb { aspect-ratio: 16/10; position: relative; display: grid; place-items: center; color: #fff; }
.project-thumb .tag {
  position: absolute; top: 14px; left: 14px; background: rgba(255,255,255,.9); color: var(--green-dark);
  font-size: .72rem; font-weight: 700; padding: 5px 12px; border-radius: 999px; letter-spacing: .04em;
}
.project-thumb .ico { opacity: .85; }
.project-body { padding: 22px 24px 26px; }
.project-body .loc { font-size: .82rem; color: var(--green-dark); font-weight: 600; margin-bottom: 6px; }
.project-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
.project-body p { color: var(--muted); font-size: .93rem; margin: 0; }

/* ---------- Süreç adımları ---------- */
.steps { counter-reset: step; display: grid; gap: 24px; }
.step { display: flex; gap: 20px; align-items: flex-start; }
.step .n {
  counter-increment: step; flex: 0 0 48px; width: 48px; height: 48px; border-radius: 12px;
  background: var(--green-soft); color: var(--green-dark); font-weight: 800; font-size: 1.15rem;
  display: grid; place-items: center;
}
.step .n::before { content: counter(step, decimal-leading-zero); }
.step h3 { margin-bottom: 4px; }
.step p { color: var(--muted); margin: 0; }

/* ---------- CTA şeridi ---------- */
.cta {
  background: linear-gradient(120deg, var(--green-dark), var(--green));
  color: #fff; border-radius: 20px; padding: 54px; text-align: center;
  position: relative; overflow: hidden;
}
.cta h2 { color: #fff; }
.cta p { color: rgba(255,255,255,.9); max-width: 560px; margin: 0 auto 26px; }
.cta .btn-light { color: var(--green-dark); }

/* ---------- İletişim ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: start; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }
.info-item { display: flex; gap: 16px; margin-bottom: 26px; }
.info-item .ic {
  flex: 0 0 46px; width: 46px; height: 46px; border-radius: 12px; background: var(--green-soft);
  color: var(--green-dark); display: grid; place-items: center;
}
.info-item h4 { margin: 0 0 4px; font-size: 1rem; }
.info-item p { margin: 0; color: var(--muted); font-size: .95rem; }

.form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 7px; color: var(--gray-900); }
.field input, .field textarea, .field select {
  width: 100%; padding: 13px 15px; border: 1.5px solid var(--line); border-radius: 10px;
  font: inherit; color: var(--text); background: #fff; transition: .18s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--green); box-shadow: 0 0 0 4px var(--green-glow);
}
.field textarea { resize: vertical; min-height: 130px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
.form-note { font-size: .82rem; color: var(--muted); margin-top: 4px; }
.form-success {
  display: none; background: var(--green-soft); border: 1px solid #bfe3bc; color: var(--green-darker);
  padding: 14px 16px; border-radius: 10px; margin-bottom: 18px; font-size: .92rem; font-weight: 500;
}
.form-success.show { display: block; }

.map-embed {
  border: 0; width: 100%; height: 320px; border-radius: var(--radius);
  filter: grayscale(.2) contrast(1.05);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--ink); color: #b7beb7; padding: 66px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer .brand { color: #fff; margin-bottom: 14px; }
.site-footer .brand .b-kent { color: #cfd6cf; }
.site-footer p { color: #98a099; font-size: .92rem; }
.footer-col h4 { color: #fff; font-size: .95rem; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 16px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer-col a { color: #a7afa7; font-size: .93rem; transition: .18s; }
.footer-col a:hover { color: #7ed977; }
.footer-contact li { display: flex; gap: 10px; color: #a7afa7; font-size: .92rem; margin-bottom: 10px; }
.footer-contact svg { flex: 0 0 18px; color: #7ed977; margin-top: 3px; }
.footer-bottom {
  margin-top: 46px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.1);
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-size: .85rem; color: #808880;
}
.footer-bottom a:hover { color: #7ed977; }

/* ============================================================
   Yardımcı sınıflar & animasyon
   ============================================================ */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

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