/* Gürültü Ölçer: Desibel — site stilleri */

:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --border: #e4e4de;
  --text: #1b1b19;
  --muted: #61615c;
  --accent: #1f7a4d;
  --accent-soft: #eaf4ee;
  --link: #16603c;
  --radius: 14px;
  --maxw: 46rem;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14140f;
    --surface: #1c1c18;
    --border: #302f29;
    --text: #ecebe4;
    --muted: #a2a19a;
    --accent: #57c98c;
    --accent-soft: #1e2f26;
    --link: #7fd7a5;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---- header ---- */

.site-head {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-head .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -.01em;
}

.brand .mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: -.02em;
  flex: 0 0 auto;
}

@media (prefers-color-scheme: dark) {
  .brand .mark { color: #10231a; }
}

nav.links {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  font-size: .92rem;
}

nav.links a {
  color: var(--muted);
  text-decoration: none;
}

nav.links a:hover { color: var(--text); }
nav.links a[aria-current="page"] { color: var(--text); font-weight: 600; }

.lang {
  padding-left: 1.1rem;
  border-left: 1px solid var(--border);
  font-variant: all-small-caps;
  letter-spacing: .04em;
}

/* ---- content ---- */

main { padding: 2.75rem 0 4rem; }

h1 {
  font-size: clamp(1.7rem, 5vw, 2.3rem);
  line-height: 1.2;
  letter-spacing: -.02em;
  margin: 0 0 .5rem;
}

h2 {
  font-size: 1.18rem;
  letter-spacing: -.01em;
  margin: 2.4rem 0 .6rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--border);
}

h2:first-of-type { border-top: 0; padding-top: 0; }

h3 { font-size: 1rem; margin: 1.6rem 0 .4rem; }

p, ul, ol { margin: 0 0 1rem; }
ul, ol { padding-left: 1.3rem; }
li { margin-bottom: .35rem; }

a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 2px; }

strong { font-weight: 650; }

.lede {
  font-size: 1.08rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

.meta {
  font-size: .88rem;
  color: var(--muted);
  margin: 0 0 2.25rem;
  padding: .85rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.meta div + div { margin-top: .2rem; }

.callout {
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  margin: 0 0 2rem;
}

.callout p:last-child { margin-bottom: 0; }

.note {
  font-size: .93rem;
  color: var(--muted);
  border-left: 3px solid var(--border);
  padding-left: 1rem;
  margin: 0 0 1.5rem;
}

/* ---- home ---- */

.hero { padding: 1rem 0 .5rem; }

.hero .mark-lg {
  width: 62px; height: 62px;
  border-radius: 17px;
  background: var(--accent);
  color: #fff;
  display: grid; place-items: center;
  font-weight: 700; font-size: .95rem; letter-spacing: -.02em;
  margin-bottom: 1.25rem;
}

@media (prefers-color-scheme: dark) { .hero .mark-lg { color: #10231a; } }

.cards {
  display: grid;
  gap: .9rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  margin: 2rem 0;
  padding: 0;
  list-style: none;
}

.cards a {
  display: block;
  height: 100%;
  padding: 1.15rem 1.2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: border-color .15s ease, transform .15s ease;
}

.cards a:hover { border-color: var(--accent); transform: translateY(-1px); }
.cards strong { display: block; margin-bottom: .2rem; }
.cards span { font-size: .92rem; color: var(--muted); }

.facts { list-style: none; padding: 0; margin: 1.5rem 0; }

.facts li {
  padding-left: 1.6rem;
  position: relative;
  margin-bottom: .55rem;
}

.facts li::before {
  content: "";
  position: absolute;
  left: .2rem; top: .62em;
  width: .5rem; height: .5rem;
  border-radius: 50%;
  background: var(--accent);
}

/* ---- faq ---- */

.faq { margin: 0 0 1.4rem; }

.faq summary {
  cursor: pointer;
  font-weight: 600;
  padding: .85rem 0;
  border-bottom: 1px solid var(--border);
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  color: var(--muted);
  font-weight: 400;
  flex: 0 0 auto;
}

.faq[open] summary::after { content: "–"; }
.faq[open] summary { border-bottom-color: transparent; }

.faq .body { padding: .2rem 0 1rem; border-bottom: 1px solid var(--border); }
.faq .body p:last-child { margin-bottom: 0; }

/* ---- footer ---- */

.site-foot {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 1.75rem 0;
  font-size: .88rem;
  color: var(--muted);
}

.site-foot .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
  justify-content: space-between;
}

.site-foot a { color: var(--muted); }

@media (max-width: 34rem) {
  body { font-size: 16px; }
  nav.links { gap: .85rem; font-size: .88rem; }
  .lang { padding-left: .85rem; }
}