/* Siyah & beyaz sade tema */
:root {
  --bg: #ffffff;
  --fg: #000000;
  --muted: #666;
  --accent: #000;
  --container: 1100px;
}
* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 2rem;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: inherit;
}
.logo .brand {
  font-weight: 700;
  letter-spacing: 0.02em;
}
.nav {
  display: flex;
  gap: 1rem;
}
.nav a {
  color: var(--fg);
  text-decoration: none;
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
}
.nav a:hover {
  background: var(--fg);
  color: var(--bg);
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--fg);
  color: var(--fg);
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
}

.site-header {
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.hero {
  padding: 4rem 0;
}
.hero-inner {
  display: flex;
  gap: 2rem;
  align-items: center;
}
.hero-copy {
  flex: 1;
}
.hero h1 {
  font-size: 2.4rem;
  margin: 0 0 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.lead {
  color: var(--muted);
  font-size: 1.05rem;
}
.hero-visual {
  width: 360px;
  height: 220px;
  flex: 0 0 360px;
}
.hero-cta {
  margin-top: 1.2rem;
  display: flex;
  gap: 0.8rem;
}
.btn {
  display: inline-block;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid var(--fg);
  background: transparent;
  color: var(--fg);
}
.btn.primary {
  background: var(--fg);
  color: var(--bg);
}
.btn.ghost {
  background: transparent;
}

.section {
  padding: 3rem 0;
}
.section.alt {
  background: var(--bg);
}
.section-title {
  font-size: 1.4rem;
  margin: 0 0 1rem;
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.card {
  border: 1px solid rgba(0, 0, 0, 0.06);
  padding: 1.2rem;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.02), transparent);
}
.card h3 {
  margin: 0 0 0.6rem;
  font-weight: 600;
}
.card ul {
  margin: 0.6rem 0 0 1.1rem;
  padding: 0;
}
.card li {
  margin: 0.4rem 0;
  color: var(--muted);
}
.muted {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.8rem;
}

.split {
  display: flex;
  gap: 2rem;
}
.split > div {
  flex: 1;
}

.contact .form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.contact label {
  display: block;
}
.contact input,
.contact textarea {
  width: 100%;
  padding: 0.6rem;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 8px;
}
.contact .full {
  grid-column: 1/-1;
}
.form-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
}
.form-status {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding: 1rem 0;
  margin-top: 2rem;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-nav {
  display: flex;
  gap: 1rem;
}
.footer-nav a {
  text-decoration: none;
  color: var(--muted);
}

@media (max-width: 900px) {
  .hero-inner {
    flex-direction: column;
  }
  .hero-visual {
    width: 100%;
    height: 180px;
  }
  .cards {
    grid-template-columns: 1fr;
  }
  .split {
    flex-direction: column;
  }
  .contact .form-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 700px) {
  .nav {
    display: none;
  }
  .nav-toggle {
    display: inline-block;
  }
  .container {
    padding: 1rem;
  }
}

/* küçük estetik dokunuşlar */
a.btn:focus,
button:focus,
input:focus,
textarea:focus {
  outline: 3px solid rgba(0, 0, 0, 0.06);
  outline-offset: 2px;
}