:root {
  color-scheme: light dark;
  --bg: #f4f5f2;
  --surface: #fbfcf9;
  --surface-strong: #ffffff;
  --text: #18211f;
  --muted: #5f6c67;
  --line: #d9dfda;
  --accent: #176b5a;
  --accent-soft: #dbeee9;
  --warning: #74541f;
  --warning-soft: #f5ecd7;
  --shadow: 0 20px 45px rgba(23, 50, 42, 0.08);
  --radius-lg: 26px;
  --radius-md: 16px;
  --max: 1120px;
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111715;
  --surface: #18211f;
  --surface-strong: #202c29;
  --text: #edf4f0;
  --muted: #b1c0ba;
  --line: #33423d;
  --accent: #76d2bb;
  --accent-soft: #153f36;
  --warning: #e8cb8f;
  --warning-soft: #3f321d;
  --shadow: 0 20px 45px rgba(0, 0, 0, 0.23);
}

* { box-sizing: border-box; }
html { min-width: 320px; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100dvh;
  background:
    radial-gradient(circle at 14% 8%, rgba(44, 121, 102, 0.08), transparent 32rem),
    var(--bg);
  color: var(--text);
  line-height: 1.62;
  transition: background-color 180ms ease, color 180ms ease;
}
a { color: inherit; }
a:hover { color: var(--accent); }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }

body:not([data-language="en"]) [lang="en"],
body[data-language="en"] [lang="tr"] { display: none !important; }

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 10;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--surface-strong);
  color: var(--text);
  border: 1px solid var(--line);
}
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 24px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  backdrop-filter: blur(16px);
}
.wordmark {
  font-size: 1.02rem;
  font-weight: 780;
  letter-spacing: -0.03em;
  text-decoration: none;
  white-space: nowrap;
}
.wordmark .mark { color: var(--accent); }
.nav-links, .header-tools { display: flex; align-items: center; gap: 7px; }
.nav-links { flex-wrap: wrap; justify-content: flex-end; }
.nav-links a, .tool-button {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 10px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.83rem;
  font-weight: 650;
  text-decoration: none;
  background: transparent;
}
.nav-links a:hover, .tool-button:hover,
.tool-button[aria-pressed="true"] {
  border-color: var(--line);
  background: var(--surface-strong);
  color: var(--text);
}
.tool-button { cursor: pointer; }
.theme-tools { display: none; }

.page-shell { max-width: var(--max); margin: 0 auto; padding: 42px 24px 86px; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(240px, 0.82fr);
  gap: clamp(28px, 8vw, 96px);
  align-items: end;
  padding: 64px 0 54px;
}
.hero-copy { max-width: 720px; }
.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 780;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
h1, h2, h3 { margin: 0; letter-spacing: -0.04em; line-height: 1.08; }
h1 { max-width: 780px; font-size: clamp(2.55rem, 7vw, 5.5rem); font-weight: 770; }
h2 { font-size: clamp(1.6rem, 3vw, 2.35rem); }
h3 { font-size: 1.15rem; }
.hero-lede { max-width: 62ch; margin: 24px 0 0; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.22rem); }
.hero-aside {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 13px;
  padding: 22px;
  border-left: 1px solid var(--line);
}
.hero-aside strong { font-size: 0.9rem; }
.hero-aside p { margin: 0; color: var(--muted); font-size: 0.91rem; }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-strong);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 740;
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}
.button:hover { border-color: var(--accent); color: var(--text); }
.button:active { transform: translateY(1px) scale(0.985); }
.button.primary { border-color: var(--accent); background: var(--accent); color: #f8fffc; }
.button.primary:hover { background: color-mix(in srgb, var(--accent) 88%, #0c2c25); color: #fff; }

.section { padding: 38px 0; border-top: 1px solid var(--line); }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 22px; }
.section-heading p { max-width: 52ch; margin: 0; color: var(--muted); }
.split-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 38px; }
.content-block { padding: 22px 0; border-top: 1px solid var(--line); }
.content-block:first-child { border-top: 0; padding-top: 0; }
.content-block p { max-width: 70ch; margin: 10px 0 0; color: var(--muted); }
.content-block ul { max-width: 72ch; margin: 12px 0 0; padding-left: 20px; color: var(--muted); }
.content-block li + li { margin-top: 7px; }
.content-block strong { color: var(--text); }
.data-list { margin: 0; border-top: 1px solid var(--line); }
.data-list > div { display: grid; grid-template-columns: minmax(120px, 0.42fr) minmax(0, 1fr); gap: 18px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.data-list dt { font-weight: 720; }
.data-list dd { margin: 0; color: var(--muted); }
.notice {
  margin: 20px 0 0;
  padding: 18px 19px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.notice.warning { border-left-color: var(--warning); background: var(--warning-soft); }
.notice strong { display: block; margin-bottom: 4px; }
.notice p { margin: 0; color: var(--muted); }
.notice.warning p { color: var(--warning); }
.feature-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 18px; }
.feature {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.feature:nth-child(2) { margin-top: 34px; background: var(--accent-soft); }
.feature p { max-width: 52ch; margin: 11px 0 0; color: var(--muted); }
.route-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 24px; }
.route-list a { display: block; padding: 14px 15px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); text-decoration: none; }
.route-list small { display: block; margin-top: 3px; color: var(--muted); }
.footer { max-width: var(--max); margin: 0 auto; padding: 0 24px 34px; color: var(--muted); font-size: 0.83rem; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; padding-top: 22px; border-top: 1px solid var(--line); }
.footer a { text-decoration: none; }
.footer p { margin: 0; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.9em; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
table { width: 100%; min-width: 600px; border-collapse: collapse; text-align: left; }
th, td { padding: 15px 16px; vertical-align: top; border-bottom: 1px solid var(--line); }
tr:last-child td { border-bottom: 0; }
th { color: var(--muted); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; }
td { color: var(--muted); }
td:first-child { color: var(--text); font-weight: 700; }
.contact-placeholder { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 20px; padding: 20px; border: 1px dashed var(--warning); border-radius: var(--radius-md); background: var(--warning-soft); }
.contact-placeholder p { margin: 6px 0 0; color: var(--warning); }
.status-pill { display: inline-flex; align-items: center; min-height: 28px; padding: 4px 9px; border: 1px solid color-mix(in srgb, var(--warning) 45%, transparent); border-radius: 999px; color: var(--warning); font-size: 0.75rem; font-weight: 750; white-space: nowrap; }
.faq { border-top: 1px solid var(--line); }
details { padding: 17px 0; border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 730; }
details p { max-width: 68ch; margin: 10px 0 0; color: var(--muted); }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 60%, transparent); outline-offset: 3px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}
@media (max-width: 760px) {
  .site-header { align-items: flex-start; flex-wrap: wrap; padding: 15px 17px; }
  .header-tools { margin-left: auto; }
  .nav-links { order: 3; width: 100%; justify-content: flex-start; overflow-x: auto; padding-bottom: 2px; }
  .nav-links a { flex: 0 0 auto; }
  .page-shell { padding: 26px 17px 64px; }
  .hero { grid-template-columns: 1fr; gap: 28px; padding: 42px 0 36px; }
  h1 { font-size: clamp(2.5rem, 14vw, 4.2rem); }
  .hero-aside { padding: 18px 0 0; border-top: 1px solid var(--line); border-left: 0; }
  .split-grid, .feature-grid, .route-list { grid-template-columns: 1fr; }
  .feature:nth-child(2) { margin-top: 0; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 10px; }
  .data-list > div { grid-template-columns: 1fr; gap: 5px; }
  .contact-placeholder { grid-template-columns: 1fr; }
  .footer { padding: 0 17px 25px; }
}