:root {
  --murekkep: #14202f;
  --kagit: #f7f5f0;
  --yuzey: #ffffff;
  --gri: #5b6472;
  --gri-acik: #8a93a1;
  --vurgu: #2f6f4f;
  --vurgu-acik: #3f8a63;
  --cizgi: #e4e2db;
  --golge: 0 1px 2px rgba(20, 32, 47, 0.04),
    0 8px 24px rgba(20, 32, 47, 0.06);
  --golge-hover: 0 2px 4px rgba(20, 32, 47, 0.06),
    0 16px 40px rgba(20, 32, 47, 0.1);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
    system-ui, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, "Courier New",
    monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  background: var(--kagit);
  color: var(--murekkep);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.sayfa {
  max-width: 1080px;
  margin: 0 auto;
  padding: 48px 32px 96px;
}

/* Üst navigasyon */
.ust-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 72px;
  flex-wrap: wrap;
}

.marka {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--murekkep);
  text-decoration: none;
}

.ust-nav-baglantilar {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.ust-nav-baglantilar a {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--gri);
  text-decoration: none;
  transition: color 0.2s ease;
}

.ust-nav-baglantilar a:hover {
  color: var(--murekkep);
}

/* Dil seçici */
.dil-secici {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.dil-secici button {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  text-transform: uppercase;
  color: var(--gri-acik);
  cursor: pointer;
  transition: color 0.2s ease;
}

.dil-secici button:hover {
  color: var(--murekkep);
}

.dil-secici button[aria-current="true"] {
  color: var(--vurgu);
  font-weight: 700;
}

.dil-secici button:focus-visible {
  outline: 2px solid var(--vurgu);
  outline-offset: 3px;
  border-radius: 2px;
}

.dil-secici .ayrac {
  color: var(--cizgi);
}

/* Hero */
.hero {
  padding: 24px 0 56px;
  max-width: 780px;
}

h1 {
  font-family: var(--font-sans);
  font-size: clamp(44px, 8vw, 72px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 24px;
}

.tanitim {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.2vw, 22px);
  color: var(--gri);
  max-width: 52ch;
  line-height: 1.5;
}

/* Bölümler */
section {
  margin-top: 96px;
  scroll-margin-top: 32px;
}

.bolum-etiket {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--vurgu);
  margin-bottom: 12px;
}

h2 {
  font-family: var(--font-sans);
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--murekkep);
  margin-bottom: 32px;
  line-height: 1.2;
}

section > p {
  font-size: 18px;
  color: var(--gri);
  max-width: 60ch;
}

/* Ne yapıyorum: iki sütunlu ızgara */
.hizmet-izgara {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.madde {
  padding: 28px;
  background: var(--yuzey);
  border: 1px solid var(--cizgi);
  border-radius: 12px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.madde:hover {
  border-color: var(--vurgu-acik);
  transform: translateY(-2px);
}

.madde h3 {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.madde p {
  color: var(--gri);
  font-size: 16px;
  line-height: 1.6;
}

/* Projeler ızgarası */
.proje-izgara {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.proje-kart {
  display: flex;
  flex-direction: column;
  background: var(--yuzey);
  border: 1px solid var(--cizgi);
  border-radius: 14px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--golge);
  transition: transform 0.25s ease, box-shadow 0.25s ease,
    border-color 0.25s ease;
}

.proje-kart--baglanti {
  cursor: pointer;
}

.proje-kart--baglanti:hover {
  transform: translateY(-4px);
  box-shadow: var(--golge-hover);
  border-color: var(--vurgu-acik);
}

.proje-kart-gorsel {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  background: var(--kagit);
}

.proje-kart-gorsel--bos {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #2f6f4f 0%, #14202f 100%);
  color: var(--kagit);
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.proje-kart-govde {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.proje-kart-baslik {
  font-family: var(--font-sans);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--murekkep);
}

.proje-kart-aciklama {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--gri);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.proje-bos-durum {
  padding: 48px;
  text-align: center;
  color: var(--gri-acik);
  font-family: var(--font-mono);
  font-size: 14px;
  border: 1px dashed var(--cizgi);
  border-radius: 12px;
}

/* Bağlantılar */
a {
  color: var(--vurgu);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--vurgu-acik);
}

a:focus-visible {
  outline: 2px solid var(--vurgu);
  outline-offset: 3px;
  border-radius: 2px;
}

/* İletişim */
.iletisim {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.iletisim a {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  border: 1px solid var(--cizgi);
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 15px;
  text-decoration: none;
  color: var(--murekkep);
  background: var(--yuzey);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease,
    transform 0.2s ease;
}

.iletisim a:hover {
  background: var(--vurgu);
  border-color: var(--vurgu);
  color: var(--kagit);
  transform: translateY(-1px);
}

footer {
  margin-top: 96px;
  padding-top: 32px;
  border-top: 1px solid var(--cizgi);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gri-acik);
  letter-spacing: 0.04em;
}

/* Mobil ayarlar */
@media (max-width: 640px) {
  .sayfa {
    padding: 32px 20px 64px;
  }

  .ust-nav {
    margin-bottom: 48px;
  }

  .ust-nav-baglantilar {
    gap: 20px;
  }

  section {
    margin-top: 72px;
  }

  .proje-izgara {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* Hareket azaltma */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}