/* ---------- Base ---------- */
:root {
  --bg: #0f131a;
  --card: #151b24;
  --text: #e9eef7;
  --muted: #a7b0c0;
  --brand: #ffd166;
  --brand-2: #70e1ff;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Poppins', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 800px at 10% -10%, rgba(112,225,255,0.05), transparent 60%),
              radial-gradient(1200px 800px at 110% 10%, rgba(255,209,102,0.07), transparent 60%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* ---------- Layout ---------- */
.container { width: min(1100px, 92%); margin: 0 auto; }
.section { padding: 56px 0; }
.section-head h2, .section-head h1 { margin: 0 0 6px; }
.section-head p { margin: 0; color: var(--muted); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(1.1) blur(8px);
  background: rgba(15,19,26,.55);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 700; letter-spacing: .2px; }
.menu a {
  color: var(--text); text-decoration: none; margin-left: 18px;
  padding: 8px 14px; border-radius: 999px; transition: .25s ease;
  border: 1px solid transparent;
}
.menu a:hover { background: rgba(255,255,255,.06); }
.menu a.active { border-color: rgba(255,255,255,.12); background: rgba(255,255,255,.04); }

/* ---------- Hero ---------- */
.hero {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; align-items: center;
  padding: 48px 0 16px;
}
.hero h1 { font-size: clamp(28px, 4vw, 44px); line-height: 1.15; margin: 0 0 10px; }
.hero p { color: var(--muted); margin: 0 0 18px; }
.hero .hero-img img {
  width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); object-fit: cover;
  aspect-ratio: 4/3; background: #0b0f15;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #0b0f15; font-weight: 700; padding: 12px 18px; border-radius: 999px;
  text-decoration: none; box-shadow: var(--shadow); transform: translateY(0);
  transition: transform .15s ease;
}
.btn:hover { transform: translateY(-2px); }

.center { text-align: center; }
.mt { margin-top: 24px; }

/* ---------- Photos Grid ---------- */
.grid-photos {
  margin-top: 18px;
  display: grid; gap: 12px;
  grid-template-columns: repeat(6, 1fr);
}
.grid-photos img {
  width: 100%; height: 170px; object-fit: cover;
  border-radius: 14px; box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}
.grid-photos img:hover { transform: scale(1.02); box-shadow: 0 12px 36px rgba(0,0,0,.45); }
@media (max-width: 900px) { .grid-photos { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 520px) { .grid-photos { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Letters ---------- */
.letters { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 18px; }
.card {
  background: var(--card); border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 6px; }
.card time { display: block; color: var(--muted); font-size: .9rem; margin-bottom: 8px; }
.card p, .card li { color: #d7deea; }
.love-list { padding-left: 18px; margin: 0; }

@media (max-width: 900px) { .letters { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .letters { grid-template-columns: 1fr; } }

/* ---------- Timeline ---------- */
.timeline {
  position: relative; margin: 40px auto; padding-left: 22px;
}
.timeline::before {
  content: ""; position: absolute; left: 8px; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(180deg, var(--brand-2), var(--brand));
  border-radius: 2px;
}
.tl-item {
  position: relative; margin: 0 0 28px 0; padding-left: 24px;
}
.tl-dot {
  position: absolute; left: 0; top: 6px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--brand); box-shadow: 0 0 0 3px rgba(255,209,102,.25);
}
.tl-content {
  background: var(--card); border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow);
}
.tl-content time { display: block; color: var(--muted); font-size: .9rem; margin-bottom: 6px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid rgba(255,255,255,.06); padding: 24px 0 36px; color: var(--muted); }
.site-footer a { color: var(--text); }

/* ---------- Reveal Animations ---------- */
.reveal { opacity: 0; transform: translateY(18px); }
.reveal.visible { opacity: 1; transform: translateY(0); transition: .65s cubic-bezier(.2,.7,.2,1); }


/* Lightbox */
.lightbox {
  display: none; /* varsayılan gizli */
  position: fixed;
  z-index: 999;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.85);
  justify-content: center;
  align-items: center;
}
.lightbox-content {
  max-width: 90%;
  max-height: 80%;
  border-radius: 12px;
  box-shadow: 0 0 25px rgba(0,0,0,0.6);
}
.lightbox .close {
  position: absolute;
  top: 20px; right: 30px;
  color: #fff;
  font-size: 36px;
  font-weight: bold;
  cursor: pointer;
}