:root {
  --zemin: #f1f4f7;
  --yuzey: #ffffff;
  --murekkep: #13202e;
  --ikincil: #556271;
  --cizgi: #d6dde5;
  --sinyal: #1f5bff;
  --sinyal-koyu: #1846c7;
  --metin: "Onest", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --genislik: 1120px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--zemin);
  color: var(--murekkep);
  font-family: var(--metin);
  font-size: 1.0625rem;
  line-height: 1.6;
}

a { color: var(--sinyal); text-underline-offset: 3px; }
a:hover { color: var(--sinyal-koyu); }
:focus-visible { outline: 3px solid var(--sinyal); outline-offset: 3px; border-radius: 4px; }

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

/* Üst bar */
.ust {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  padding-bottom: 28px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--murekkep);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}
.logo svg { width: 28px; height: 28px; }
.menu { display: flex; gap: 28px; }
.menu a { color: var(--murekkep); text-decoration: none; font-size: 0.9375rem; }
.menu a:hover { color: var(--sinyal); }

/* Giriş */
.giris {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 64px;
  align-items: center;
  padding-top: 56px;
  padding-bottom: 96px;
}
.giris h1 {
  margin: 0 0 24px;
  font-size: clamp(2.5rem, 5.4vw, 4.25rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 700;
  max-width: 13ch;
}
.giris .tanitim {
  margin: 0;
  max-width: 46ch;
  color: var(--ikincil);
  font-size: 1.1875rem;
}
.dugme {
  display: inline-block;
  padding: 14px 24px;
  background: var(--murekkep);
  color: #fff;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
}
.dugme:hover { background: var(--sinyal); color: #fff; }

/* Ölçüm paneli */
.panel {
  background: var(--murekkep);
  color: #e8eef5;
  border-radius: 20px;
  overflow: hidden;
}
.serit { display: grid; grid-template-columns: repeat(7, 1fr); height: 10px; }
.serit span:nth-child(1) { background: #c0c0c0; }
.serit span:nth-child(2) { background: #c0c000; }
.serit span:nth-child(3) { background: #00c0c0; }
.serit span:nth-child(4) { background: #00c000; }
.serit span:nth-child(5) { background: #c000c0; }
.serit span:nth-child(6) { background: #c00000; }
.serit span:nth-child(7) { background: #0000c0; }
.panel-ic { padding: 24px 28px 26px; }
.panel h2 {
  margin: 0 0 18px;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
}
.olcum { margin: 0; }
.olcum div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.olcum dt { color: #a9b6c4; font-size: 0.9375rem; }
.olcum dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.9375rem;
  color: #fff;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.olcum dd.bekliyor { color: #a9b6c4; }
.panel-not {
  margin: 16px 0 0;
  font-size: 0.8125rem;
  color: #a9b6c4;
  line-height: 1.5;
}

/* Bölümler */
.bolum {
  padding-top: 88px;
  padding-bottom: 88px;
  border-top: 1px solid var(--cizgi);
}
.bolum > h2 {
  margin: 0 0 48px;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  letter-spacing: -0.025em;
  line-height: 1.15;
  font-weight: 700;
}
.isler {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 48px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.isler h3 {
  margin: 0 0 10px;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}
.isler p { margin: 0; color: var(--ikincil); }
.isler li > svg { width: 32px; height: 32px; margin-bottom: 18px; color: var(--sinyal); }

.iletisim {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 48px;
  align-items: end;
}
.iletisim h2 { margin: 0 0 12px; }
.iletisim p { margin: 0; color: var(--ikincil); max-width: 40ch; }
.eposta {
  justify-self: end;
  font-size: clamp(1.5rem, 3.6vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--murekkep);
  text-decoration-color: var(--sinyal);
  text-decoration-thickness: 3px;
  text-underline-offset: 8px;
  overflow-wrap: anywhere;
}
.eposta:hover { color: var(--sinyal); }

.alt {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 28px;
  padding-bottom: 40px;
  border-top: 1px solid var(--cizgi);
  color: var(--ikincil);
  font-size: 0.875rem;
}
.alt a { color: var(--ikincil); }

/* Gizlilik sayfası */
.metin {
  max-width: 68ch;
  padding-top: 40px;
  padding-bottom: 96px;
}
.metin .geri { display: inline-block; margin-bottom: 32px; font-size: 0.9375rem; }
.metin h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.metin .uyg { margin: 0 0 4px; font-size: 1.25rem; font-weight: 600; }
.metin .tarih { margin: 0 0 40px; color: var(--ikincil); font-size: 0.9375rem; }
.metin h2 {
  margin: 44px 0 12px;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}
.metin p, .metin li { color: #2c3a49; }
.metin ul { padding-left: 1.2em; }
.metin li { margin-bottom: 4px; }

@media (max-width: 900px) {
  .giris { grid-template-columns: 1fr; gap: 48px; padding-top: 24px; padding-bottom: 72px; }
  .isler { grid-template-columns: 1fr; gap: 36px; }
  .iletisim { grid-template-columns: 1fr; gap: 24px; }
  .eposta { justify-self: start; }
  .bolum { padding-top: 64px; padding-bottom: 64px; }
}

@media (max-width: 520px) {
  .kap { padding: 0 16px; }
  .menu { gap: 18px; }
  .panel-ic { padding: 20px 20px 22px; }
}