/* ==========================================================================
   ITC KİMYA — sade sürüm
   Tek stil dosyası. Animasyon yok, koyu bölüm yok, canvas yok.
   Beyaz zemin, lacivert kurumsal ton, geniş boşluk, okunaklı tipografi.
   ========================================================================== */

:root {
  color-scheme: light;

  --navy: #123a63;
  --navy-dark: #0d2c4c;
  --accent: #1d6fb8;
  --accent-dark: #155a97;

  --ink: #16233a;
  --body: #4a5568;
  --muted: #79839a;

  --bg: #ffffff;
  --band: #f6f7f9;
  --band-2: #eef1f5;
  --line: #e1e5ea;

  --wrap: 1120px;
  --pad: clamp(1.25rem, 0.75rem + 2.4vw, 2.5rem);
  --gap: clamp(3rem, 2rem + 4vw, 5.5rem);

  --r: 6px;
  --nav-h: 108px;

  --ff: "Inter", "Segoe UI", Tahoma, "Helvetica Neue", Arial, sans-serif;
}

/* -------------------------------------------------------------- reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 125px; }

body {
  font-family: var(--ff);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  /* Türkçe: fi ligatürü i'nin noktasını siler ("fiyat", "sertifika") */
  font-variant-ligatures: no-common-ligatures;
  hyphens: manual;
  overflow-wrap: break-word;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
table { border-collapse: collapse; width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* -------------------------------------------------------------- tipografi */
h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

h1 { font-size: clamp(1.875rem, 1.4rem + 2.1vw, 2.75rem); line-height: 1.18; }
h2 { font-size: clamp(1.5rem, 1.25rem + 1.1vw, 2rem); }
h3 { font-size: 1.1875rem; letter-spacing: -0.005em; }
h4 { font-size: 1rem; letter-spacing: 0; }

p { text-wrap: pretty; }
.lead { font-size: 1.125rem; line-height: 1.65; color: var(--body); max-width: 62ch; }
.measure { max-width: 66ch; }
.muted { color: var(--muted); }
.small { font-size: 0.9375rem; }

.eyebrow {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

/* -------------------------------------------------------------- düzen */
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--pad); }

section { padding-block: var(--gap); }
.band { background: var(--band); }
.band-2 { background: var(--band-2); }

.hr { height: 1px; background: var(--line); border: 0; }

.grid { display: grid; gap: 1.5rem; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 860px) { .g3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .g2, .g3 { grid-template-columns: minmax(0, 1fr); } }

.section-head { margin-bottom: 2.5rem; max-width: 60ch; }
.section-head p { margin-top: 0.75rem; }

/* -------------------------------------------------------------- üst bar */
.topbar {
  background: var(--navy-dark);
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.8125rem;
}
.topbar .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  min-height: 40px;
  flex-wrap: wrap;
}
.topbar a:hover { color: #fff; }
.topbar__right { display: flex; gap: 1.5rem; }
@media (max-width: 700px) { .topbar__left { display: none; } .topbar .wrap { justify-content: center; } }

/* -------------------------------------------------------------- başlık */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.header .wrap {
  display: flex;
  align-items: center;
  gap: 2rem;
  min-height: var(--nav-h);
}

.logo { display: block; width: 320px; max-width: 100%; flex: none; }
.logo__image { display: block; width: 100%; height: auto; aspect-ratio: 1290 / 368; overflow: hidden; }
.footer .logo { width: 300px; padding: 0; mix-blend-mode: multiply; }

.nav { display: flex; align-items: center; gap: 0.35rem; margin-left: auto; }
.nav a {
  padding: 0.5rem 0.85rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink);
  border-radius: var(--r);
}
.nav a:hover { background: var(--band); }
.nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.35rem;
  border-radius: var(--r);
  background: var(--accent);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  border: 1px solid var(--accent);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { background: var(--accent-dark); border-color: var(--accent-dark); }

.btn--line { background: #fff; color: var(--ink); border-color: var(--line); }
.btn--line:hover { background: var(--band); border-color: #cdd4dc; }

.btn--lg { padding: 0.85rem 1.7rem; font-size: 1rem; }

.burger {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: #fff;
  cursor: pointer;
  position: relative;
  flex: none;
}
.burger span, .burger::before, .burger::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}
.burger::before { top: 14px; }
.burger span { top: 20px; }
.burger::after { bottom: 14px; }

@media (max-width: 1000px) {
  :root { --nav-h: 96px; }
  .header .wrap { gap: 1rem; }
  .header .logo { width: min(280px, calc(100vw - 104px)); }
  .nav { display: none; }
  .header .wrap > .btn { display: none; }
  .burger { display: block; margin-left: auto; }
  body.menu-open .nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 0.5rem var(--pad) 1.25rem;
    gap: 0;
    margin: 0;
  }
  body.menu-open .nav a { padding: 0.85rem 0; border-bottom: 1px solid var(--line); border-radius: 0; }
  body.menu-open .nav a:last-child { border-bottom: 0; }
}

/* -------------------------------------------------------------- hero */
.hero { padding-block: clamp(3rem, 2rem + 4vw, 5rem); border-bottom: 1px solid var(--line); }
.hero h1 { max-width: 20ch; }
.hero .lead { margin-top: 1.25rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

.page-head { padding-block: clamp(2.25rem, 1.5rem + 3vw, 3.5rem); background: var(--band); border-bottom: 1px solid var(--line); }
.page-head h1 { max-width: 22ch; }
.page-head p { margin-top: 0.85rem; max-width: 60ch; }

.crumbs { font-size: 0.8125rem; color: var(--muted); margin-bottom: 0.85rem; }
.crumbs a:hover { color: var(--accent); }

/* -------------------------------------------------------------- kart */
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 1.75rem;
}
.card h3 { margin-bottom: 0.6rem; }
.card p { font-size: 0.9375rem; }

.card--link { transition: border-color 0.15s ease; }
.card--link:hover { border-color: #c3cede; }

.card__more {
  display: inline-block;
  margin-top: 1.1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--accent);
}
.card__more:hover { text-decoration: underline; }

/* ürün grubu kutusu */
.group {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
}
/* Zemin, çok açık bir fotoğraf gelse bile alanın boşluk değil
   kasıtlı bir görsel olduğunu belli eder. */
.group img { width: 100%; height: 170px; object-fit: cover; background: var(--band-2); }
.group__body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.group h3 { margin-bottom: 0.5rem; }
.group p { font-size: 0.9375rem; flex: 1; }
.group ul { margin-top: 1rem; font-size: 0.9375rem; }
.group li { padding-left: 1rem; position: relative; color: var(--body); }
.group li::before { content: "·"; position: absolute; left: 0.25rem; color: var(--accent); font-weight: 700; }

/* -------------------------------------------------------------- ürün listesi */
.prod-group { padding-top: 2.75rem; border-top: 1px solid var(--line); margin-top: 2.75rem; }
.prod-group:first-child { border-top: 0; margin-top: 0; padding-top: 0; }
.prod-group > p { margin-top: 0.6rem; max-width: 62ch; }

.prod-list { margin-top: 1.75rem; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.prod-list li {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.prod-list li:last-child { border-bottom: 0; }
.prod-list li:nth-child(odd) { background: #fbfcfd; }
.prod-list b { color: var(--navy); font-weight: 600; font-size: 0.9375rem; letter-spacing: 0.01em; }
.prod-list span { font-size: 0.9375rem; }

@media (max-width: 620px) {
  .prod-list li { grid-template-columns: 1fr; gap: 0.25rem; }
}

/* -------------------------------------------------------------- basit liste */
.ticks { display: grid; gap: 0.7rem; }
.ticks li { padding-left: 1.6rem; position: relative; font-size: 0.9375rem; }
.ticks li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.6em;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.pill-list { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pill {
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  font-size: 0.875rem;
  background: #fff;
  color: var(--body);
}

/* -------------------------------------------------------------- tablo */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); }
.table-wrap table { min-width: 520px; font-size: 0.9375rem; }
th, td { padding: 0.85rem 1.1rem; text-align: left; border-bottom: 1px solid var(--line); }
thead th { background: var(--band); font-size: 0.8125rem; font-weight: 600; color: var(--ink); }
tbody tr:last-child td, tbody tr:last-child th { border-bottom: 0; }
tbody th { font-weight: 500; color: var(--ink); }

/* -------------------------------------------------------------- rakamlar */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.stats div { padding-left: 1.25rem; border-left: 2px solid var(--accent); }
.stats b { display: block; font-size: 1.75rem; font-weight: 700; color: var(--ink); line-height: 1.2; }
.stats span { display: block; font-size: 0.875rem; color: var(--muted); margin-top: 0.25rem; }
@media (max-width: 780px) { .stats { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 420px) { .stats { grid-template-columns: 1fr; } }

/* -------------------------------------------------------------- iletişim */
.contact-grid { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: clamp(2rem, 1rem + 3vw, 3.5rem); align-items: start; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: minmax(0, 1fr); } }

.info { display: grid; gap: 1.5rem; }
.info div { }
.info dt { font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.3rem; }
.info dd { font-size: 0.9375rem; color: var(--ink); }
.info dd a:hover { color: var(--accent); }

.form { display: grid; gap: 1.1rem; background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: clamp(1.5rem, 1rem + 1.5vw, 2.25rem); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
@media (max-width: 560px) { .row2 { grid-template-columns: 1fr; } }

.field label { display: block; font-size: 0.875rem; font-weight: 500; color: var(--ink); margin-bottom: 0.35rem; }
.field label i { font-style: normal; color: var(--accent); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: #fff;
  font-size: 0.9375rem;
}
.field textarea { min-height: 130px; resize: vertical; line-height: 1.6; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); }

.check { display: flex; gap: 0.6rem; align-items: flex-start; font-size: 0.875rem; color: var(--muted); }
.check input { margin-top: 0.28rem; flex: none; }
.check a { color: var(--accent); text-decoration: underline; }

.note { font-size: 0.875rem; color: var(--muted); }

/* -------------------------------------------------------------- CTA şeridi */
.cta {
  background: var(--navy);
  color: #fff;
  text-align: center;
}
.cta h2 { color: #fff; }
.cta p { margin-top: 0.75rem; color: rgba(255, 255, 255, 0.82); max-width: 54ch; margin-inline: auto; }
.cta .btn { margin-top: 1.75rem; background: #fff; color: var(--navy); border-color: #fff; }
.cta .btn:hover { background: #eef2f7; border-color: #eef2f7; }

/* -------------------------------------------------------------- alt bilgi */
.footer { background: var(--band); border-top: 1px solid var(--line); padding-block: 3rem 1.5rem; font-size: 0.9375rem; }
.footer__cols { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 2rem; }
@media (max-width: 860px) { .footer__cols { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .footer__cols { grid-template-columns: 1fr; } }

.footer h4 { font-size: 0.8125rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.9rem; font-weight: 600; }
.footer a { display: block; padding: 0.25rem 0; color: var(--body); }
.footer a:hover { color: var(--accent); }
.footer__about p { color: var(--muted); max-width: 34ch; margin-top: 0.9rem; font-size: 0.9375rem; }

.footer__bottom {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--muted);
}
.footer__bottom nav { display: flex; flex-wrap: wrap; gap: 1.25rem; }

.legal { margin-top: 1rem; font-size: 0.75rem; color: var(--muted); line-height: 1.7; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}