/* =========================================================
   Sıla Yurt | Kişisel Blog / Portfolyo
   İçindekiler: 1.Değişkenler 2.Temel 3.Menü 4.Hero 5.Bölümler
   6.Hakkımda 7.Hobiler 8.Galeri 9.Zaman çizelgesi 10.İletişim
   11.Lightbox 12.Mobil
   ========================================================= */

/* 1. RENK VE YAZI DEĞİŞKENLERİ */
:root {
  --siyah: #0B0D12;
  --lacivert: #101C35;
  --mavi: #2864DC;
  --acik-mavi: #8CB7FF;
  --beyaz: #FFFFFF;
  --gri: #F1F3F7;
  --baslik: "Bricolage Grotesque", "Segoe UI", Arial, sans-serif;
  --metin: "Inter Tight", "Segoe UI", Arial, sans-serif;
  --gecis: 0.35s ease;
}

/* 2. TEMEL AYARLAR */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 70px; }
body { font-family: var(--metin); font-size: 1.05rem; line-height: 1.7; color: var(--siyah); background: var(--beyaz); }
img { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--baslik); line-height: 1.05; letter-spacing: -0.02em; }
:focus-visible { outline: 3px solid var(--acik-mavi); outline-offset: 3px; }

/* 3. ÜST MENÜ */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem clamp(1.2rem, 5vw, 4rem);
  background: rgba(11, 13, 18, 0.82); backdrop-filter: blur(10px);
  color: var(--beyaz);
}
.logo { font-family: var(--baslik); font-weight: 800; font-size: 1.25rem; text-decoration: none; }
.nav { display: flex; gap: 1.8rem; }
.nav a { text-decoration: none; font-size: 0.95rem; color: #cfd6e6; position: relative; transition: color var(--gecis); }
.nav a::after { content: ""; position: absolute; left: 0; bottom: -4px; width: 100%; height: 2px; background: var(--mavi); transform: scaleX(0); transform-origin: left; transition: transform var(--gecis); }
.nav a:hover, .nav a.active { color: var(--beyaz); }
.nav a:hover::after, .nav a.active::after { transform: scaleX(1); }
.menu-btn { display: none; background: none; border: 0; width: 40px; height: 40px; cursor: pointer; position: relative; }
.menu-btn span { position: absolute; left: 8px; right: 8px; height: 2px; background: var(--beyaz); transition: transform var(--gecis), top var(--gecis); }
.menu-btn span:first-child { top: 15px; }
.menu-btn span:last-child { top: 23px; }
.menu-btn[aria-expanded="true"] span:first-child { top: 19px; transform: rotate(45deg); }
.menu-btn[aria-expanded="true"] span:last-child { top: 19px; transform: rotate(-45deg); }

/* 4. ANA SAYFA (HERO) */
.hero {
  min-height: 100vh; display: grid; grid-template-columns: 1.15fr 0.85fr; align-items: center; gap: 2rem;
  padding: 7rem clamp(1.2rem, 5vw, 4rem) 4rem;
  background: var(--siyah); color: var(--beyaz); overflow: hidden;
}
.hero h1 { font-size: clamp(3rem, 8.5vw, 7.5rem); font-weight: 800; margin-bottom: 1.8rem; }
.hero-text p { max-width: 36rem; color: #c3cde2; margin-bottom: 2.2rem; }
.btns { display: flex; flex-wrap: wrap; gap: 1rem; }
.btn { display: inline-block; padding: 0.9rem 1.7rem; border-radius: 999px; font-weight: 500; text-decoration: none; border: 1.5px solid var(--mavi); cursor: pointer; font: inherit; font-weight: 500; transition: background var(--gecis), color var(--gecis), transform var(--gecis); }
.btn-fill { background: var(--mavi); color: var(--beyaz); }
.btn-fill:hover { background: var(--acik-mavi); border-color: var(--acik-mavi); color: var(--siyah); transform: translateY(-2px); }
.btn-line { background: transparent; color: var(--beyaz); border-color: rgba(255,255,255,.4); }
.btn-line:hover { border-color: var(--acik-mavi); color: var(--acik-mavi); transform: translateY(-2px); }

/* Hero kompozisyonu: mavi daire + halka + kemer biçimli portre alanı */
.hero-art { position: relative; aspect-ratio: 4 / 5; width: min(100%, 440px); justify-self: center; }
.shape { position: absolute; border-radius: 50%; }
.circle { width: 70%; aspect-ratio: 1; background: var(--mavi); right: -8%; top: 2%; }
.ring { width: 46%; aspect-ratio: 1; border: 2px solid var(--acik-mavi); left: -6%; bottom: 4%; }
.arch { position: absolute; inset: 14% 8% 0 14%; border-radius: 999px 999px 8px 8px; overflow: hidden; background: var(--lacivert); animation: yuksel 1.1s ease both; }
.arch img { width: 100%; height: 100%; object-fit: cover; }
@keyframes yuksel { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: none; } }

/* 5. GENEL BÖLÜM DÜZENİ */
.section { padding: clamp(4.5rem, 10vw, 8rem) clamp(1.2rem, 5vw, 4rem); }
.section h2 { font-size: clamp(2.6rem, 6vw, 5rem); font-weight: 800; margin-bottom: 2.5rem; }
.lead { font-size: 1.2rem; max-width: 38rem; margin: -1rem 0 2.5rem; }
.dark { background: var(--siyah); color: var(--beyaz); }
.navy { background: var(--lacivert); color: var(--beyaz); }

/* Fotoğraf yer tutucu: görsel yoksa dosya adı gösterilir */
.ph { position: relative; background: var(--gri); overflow: hidden; }
.dark .ph, .navy .ph, .hero .ph { background: var(--lacivert); }
.ph::after { content: attr(data-name); position: absolute; inset: 0; display: grid; place-items: center; font-size: 0.85rem; color: var(--mavi); border: 1.5px dashed var(--acik-mavi); pointer-events: none; }
.ph.loaded::after { display: none; }
.ph:not(.loaded) img { visibility: hidden; }
.hero .ph::after { display: none; }

/* 6. HAKKIMDA */
.about { background: var(--gri); }
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.about-text p { margin-bottom: 1.2rem; max-width: 40rem; }
.facts { background: var(--beyaz); border-left: 6px solid var(--mavi); padding: 1.8rem 2rem; }
.facts div { padding: 0.8rem 0; border-bottom: 1px solid var(--gri); }
.facts div:last-child { border: 0; }
.facts dt { font-size: 0.9rem; color: var(--mavi); }
.facts dd { font-family: var(--baslik); font-weight: 700; font-size: 1.3rem; }

/* 7. HOBİLER */
.hobby-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.hobby { padding: 2.2rem 0 0; border-top: 3px solid var(--mavi); transition: border-color var(--gecis), transform var(--gecis); }
.hobby:hover { border-color: var(--acik-mavi); transform: translateY(-4px); }
.hobby h3 { font-size: clamp(2rem, 3.4vw, 2.8rem); margin-bottom: 1rem; }
.hobby p { color: #c3cde2; max-width: 24rem; }
.hobby:nth-child(2) { margin-top: 3rem; } /* asimetrik kaydırma */

/* 8. GALERİ: CSS sütunlarıyla masonry */
.gallery { columns: 3; column-gap: 1.2rem; }
.gallery figure { break-inside: avoid; margin-bottom: 1.2rem; cursor: zoom-in; }
.gallery img { width: 100%; height: auto; transition: transform 0.5s ease; }
.gallery figure:hover img { transform: scale(1.05); }
/* Yer tutucu oranları: gerçek görsel yüklenince JS bu sınıfları kaldırır */
.r-tall:not(.loaded) { aspect-ratio: 3 / 4; }
.r-wide:not(.loaded) { aspect-ratio: 4 / 3; }
.r-square:not(.loaded) { aspect-ratio: 1; }

/* 9. HEDEFLER: ZAMAN ÇİZELGESİ */
.timeline { list-style: none; position: relative; max-width: 46rem; margin-left: 1rem; padding-left: 2.5rem; border-left: 2px solid var(--mavi); }
.timeline li { position: relative; padding-bottom: 2.8rem; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before { content: ""; position: absolute; left: calc(-2.5rem - 8px); top: 0.55rem; width: 14px; height: 14px; border-radius: 50%; background: var(--acik-mavi); border: 2px solid var(--lacivert); box-shadow: 0 0 0 2px var(--mavi); transition: background var(--gecis); }
.timeline li:hover::before { background: var(--mavi); }
.timeline h3 { font-size: 1.9rem; margin-bottom: 0.3rem; }
.timeline p { color: #c3cde2; }

/* 10. İLETİŞİM */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.mail { font-family: var(--baslik); font-weight: 700; font-size: clamp(1.4rem, 3vw, 2.2rem); color: var(--mavi); text-decoration: none; border-bottom: 3px solid var(--acik-mavi); word-break: break-all; transition: color var(--gecis); }
.mail:hover { color: var(--siyah); }
.form { display: grid; gap: 1.2rem; }
.form label { display: grid; gap: 0.4rem; font-size: 0.95rem; }
.form input, .form textarea { font: inherit; padding: 0.8rem 1rem; border: 1.5px solid #cdd4e2; background: var(--gri); border-radius: 6px; transition: border-color var(--gecis); }
.form input:focus, .form textarea:focus { outline: none; border-color: var(--mavi); background: var(--beyaz); }
.form .btn { justify-self: start; }
.footer { background: var(--siyah); color: #9aa6c0; text-align: center; padding: 2rem 1rem; font-size: 0.9rem; }

/* 11. LIGHTBOX */
.lightbox { border: 0; background: transparent; max-width: 92vw; max-height: 92vh; margin: auto; color: var(--beyaz); text-align: center; }
.lightbox::backdrop { background: rgba(11, 13, 18, 0.92); }
.lightbox img { max-height: 85vh; width: auto; margin: 0 auto; }
.lightbox p { padding: 2rem; color: var(--acik-mavi); }
.lb-close { position: fixed; top: 1rem; right: 1.5rem; background: none; border: 0; color: var(--beyaz); font-size: 2.5rem; cursor: pointer; transition: color var(--gecis); }
.lb-close:hover { color: var(--acik-mavi); }

/* 12. TABLET VE MOBİL */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 6.5rem; }
  .hero-art { width: min(80%, 340px); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .hobby-grid { grid-template-columns: 1fr; max-width: 520px; }
  .hobby:nth-child(2) { margin-top: 0; }
  .gallery { columns: 2; }
  .menu-btn { display: block; }
  .nav { position: fixed; inset: 64px 0 auto 0; flex-direction: column; gap: 0; background: var(--siyah); padding: 0.5rem clamp(1.2rem, 5vw, 4rem) 1.5rem; transform: translateY(-120%); transition: transform var(--gecis); }
  .nav.open { transform: none; }
  .nav a { padding: 0.9rem 0; border-bottom: 1px solid rgba(255,255,255,.08); }
}
@media (max-width: 520px) {
  .gallery { columns: 1; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}