/* Rivapera — Sosyal Medya & Web Tasarım Ajansı */
:root {
  --bg: #08080C;
  --bg2: #101017;
  --line: rgba(255, 255, 255, .09);
  --line-2: rgba(255, 255, 255, .18);
  --text: #F5F5F7;
  --muted: #9A9AA8;
  --pink: #FF2D8A;
  --purple: #9B4FD9;
  --indigo: #3B3F9E;
  --grad: linear-gradient(120deg, var(--pink), var(--purple) 55%, var(--indigo));
  --hdr: rgba(8, 8, 12, .72);
  --kap: 1200px;
  --f: "Montserrat", system-ui, -apple-system, "Segoe UI", sans-serif;
}
[data-tema="acik"] {
  --bg: #F7F7FA; --bg2: #FFFFFF;
  --line: rgba(10, 10, 15, .1); --line-2: rgba(10, 10, 15, .2);
  --text: #0A0A0F; --muted: #5E5E6E;
  --hdr: rgba(247, 247, 250, .78);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg); color: var(--text); font-family: var(--f);
  line-height: 1.65; overflow-x: hidden; -webkit-font-smoothing: antialiased;
  transition: background-color .4s, color .4s;
}
img, canvas, svg { display: block; max-width: 100%; }
[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
.kap { max-width: var(--kap); margin: 0 auto; padding: 0 24px; }
.gecis { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.soluk { color: var(--muted); }
.etiket {
  display: inline-flex; align-items: center; gap: .5rem; font-size: .72rem; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: .4rem 1rem; background: rgba(255,255,255,.03);
}
.etiket::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--pink); box-shadow: 0 0 12px var(--pink); }

h1, h2, h3 { line-height: 1.08; letter-spacing: -.03em; font-weight: 800; }
h1 { font-size: clamp(2.6rem, 7.2vw, 5.6rem); }
h2 { font-size: clamp(2rem, 4.4vw, 3.4rem); letter-spacing: -.025em; }
h3 { font-size: 1.18rem; font-weight: 700; letter-spacing: -.01em; }

/* --- düğmeler --- */
.btn {
  display: inline-flex; align-items: center; gap: .55rem; font-family: inherit; font-weight: 700;
  font-size: .95rem; padding: .95rem 1.7rem; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; transition: transform .25s cubic-bezier(.2,.8,.2,1), box-shadow .25s, border-color .25s, background .25s;
}
.btn-ana { background: var(--grad); color: #fff; box-shadow: 0 10px 40px rgba(255, 45, 138, .32); }
.btn-ana:hover { transform: translateY(-2px); box-shadow: 0 16px 50px rgba(255, 45, 138, .45); }
.btn-cizgi { border-color: var(--line-2); color: var(--text); }
.btn-cizgi:hover { border-color: var(--text); transform: translateY(-2px); }
.btn-kucuk { padding: .62rem 1.2rem; font-size: .85rem; }

/* --- üst menü --- */
header {
  position: fixed; inset: 0 0 auto; z-index: 40; background: var(--hdr);
  backdrop-filter: blur(14px); border-bottom: 1px solid transparent; transition: border-color .3s, background .3s;
}
header.kayan { border-bottom-color: var(--line); }
header .kap { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 1.5rem; }
.marka img { height: 26px; width: auto; }
nav.menu { display: flex; align-items: center; gap: 2rem; }
nav.menu a { font-size: .9rem; font-weight: 600; color: var(--muted); transition: color .2s; }
nav.menu a:hover { color: var(--text); }
.sag { display: flex; align-items: center; gap: .8rem; }
.tema-btn {
  width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line); background: transparent;
  color: var(--text); cursor: pointer; display: grid; place-items: center; font-size: 1rem; transition: border-color .2s, transform .2s;
}
.tema-btn:hover { border-color: var(--line-2); transform: rotate(18deg); }
.menu-btn { display: none; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 12px; background: transparent; color: var(--text); font-size: 1.1rem; cursor: pointer; }

/* --- açılış / 3D --- */
.kahraman { position: relative; min-height: 100svh; display: grid; place-items: center; padding: 120px 0 80px; overflow: hidden; }
#sahne { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.kahraman .isik {
  position: absolute; width: 60vw; height: 60vw; max-width: 720px; max-height: 720px; border-radius: 50%;
  filter: blur(120px); opacity: .5; z-index: 0; pointer-events: none;
}
.isik-1 { background: var(--pink); top: -12%; left: -8%; }
.isik-2 { background: var(--indigo); bottom: -18%; right: -10%; opacity: .45; }
[data-tema="acik"] .isik { opacity: .22; }
.kahraman .kap { position: relative; z-index: 2; max-width: calc(var(--kap) + 0px); }
.kahraman .yazi { max-width: 32rem; }
.kahraman h1 { margin: 1.6rem 0 0; }
.kahraman .alt { margin: 1.5rem 0 0; font-size: 1.1rem; color: var(--muted); }
.kahraman .dugmeler { display: flex; gap: .9rem; flex-wrap: wrap; margin-top: 2.2rem; }
.kaydir { position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 2; font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--muted); display: flex; flex-direction: column; align-items: center; gap: .6rem; }
.kaydir span { width: 1px; height: 42px; background: linear-gradient(var(--muted), transparent); animation: kaydir 2.2s ease-in-out infinite; }
@keyframes kaydir { 0%, 100% { transform: scaleY(.4); transform-origin: top; opacity: .3; } 50% { transform: scaleY(1); opacity: 1; } }

/* --- kayan şerit --- */
.serit { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 1.1rem 0; overflow: hidden; background: var(--bg2); }
.serit-iz { display: flex; width: max-content; animation: serit 32s linear infinite; }
.serit-grup { display: flex; align-items: center; flex: none; }
.serit-grup b { font-size: clamp(1rem, 2vw, 1.4rem); font-weight: 800; letter-spacing: -.02em; padding: 0 1.6rem; white-space: nowrap; }
.serit-grup i { font-style: normal; color: var(--pink); font-size: .7rem; }
@keyframes serit { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* --- bölümler --- */
section.bolum { padding: clamp(80px, 12vh, 140px) 0; position: relative; }
.bolum-bas { max-width: 46rem; margin-bottom: 3.5rem; }
.bolum-bas h2 { margin: 1.2rem 0 0; }
.bolum-bas p { margin-top: 1.1rem; font-size: 1.08rem; color: var(--muted); }
.orta { margin-left: auto; margin-right: auto; text-align: center; }

.izgara { display: grid; gap: 22px; }
.k3 { grid-template-columns: repeat(3, 1fr); }
.k4 { grid-template-columns: repeat(4, 1fr); }

.kart {
  position: relative; border: 1px solid var(--line); border-radius: 22px; padding: 2rem 1.8rem;
  background: linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.01));
  overflow: hidden; transition: transform .4s cubic-bezier(.2,.8,.2,1), border-color .4s;
}
[data-tema="acik"] .kart { background: var(--bg2); box-shadow: 0 1px 3px rgba(10,10,15,.05); }
.kart::after {
  content: ""; position: absolute; inset: 0; border-radius: 22px; padding: 1px;
  background: var(--grad); opacity: 0; transition: opacity .4s;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.kart:hover { transform: translateY(-6px); }
.kart:hover::after { opacity: 1; }
.kart .no { font-size: .78rem; font-weight: 800; letter-spacing: .1em; color: var(--pink); }
.kart h3 { margin: .9rem 0 .7rem; }
.kart p { color: var(--muted); font-size: .96rem; }
.rozetler { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.4rem; }
.rozet { font-size: .75rem; font-weight: 600; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: .3rem .8rem; }

.sayilar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 3rem; }
.sayi b { display: block; font-size: clamp(1.8rem, 3.4vw, 2.6rem); font-weight: 800; letter-spacing: -.03em; }
.sayi span { font-size: .9rem; color: var(--muted); }

.sektor { display: flex; align-items: center; gap: 1.1rem; border: 1px solid var(--line); border-radius: 18px; padding: 1.3rem 1.5rem; transition: border-color .3s, transform .3s; }
.sektor:hover { border-color: var(--line-2); transform: translateX(4px); }
.sektor .ikon { width: 46px; height: 46px; flex: none; border-radius: 14px; display: grid; place-items: center; font-size: 1.3rem; background: linear-gradient(140deg, rgba(255,45,138,.16), rgba(59,63,158,.16)); }
.sektor p { font-size: .9rem; color: var(--muted); }

/* süreç */
.surec { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); }
.adim { padding: 2.2rem 1.6rem 0 0; border-right: 1px solid var(--line); position: relative; }
.adim:last-child { border-right: 0; }
.adim::before { content: ""; position: absolute; top: -1px; left: 0; width: 0; height: 2px; background: var(--grad); transition: width .8s cubic-bezier(.2,.8,.2,1); }
.adim.gorundu::before { width: 100%; }
.adim .no { font-size: .78rem; font-weight: 800; color: var(--pink); letter-spacing: .1em; }
.adim h3 { margin: .7rem 0 .6rem; }
.adim p { font-size: .93rem; color: var(--muted); padding-right: 1.2rem; }

/* çalışmalar */
.calismalar { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.is {
  position: relative; aspect-ratio: 4 / 3; border-radius: 22px; border: 1px solid var(--line);
  display: grid; place-items: center; text-align: center; padding: 2rem; overflow: hidden;
  background: linear-gradient(150deg, rgba(255,45,138,.09), rgba(59,63,158,.09));
}
.is .yakinda { font-size: .72rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; color: var(--muted); }
.is b { display: block; font-size: 1.25rem; margin-top: .6rem; letter-spacing: -.02em; }

/* iletişim */
.cagri { position: relative; border-radius: 32px; padding: clamp(3rem, 7vw, 5.5rem) 2rem; text-align: center; overflow: hidden; border: 1px solid var(--line); background: var(--bg2); }
.cagri::before { content: ""; position: absolute; width: 140%; height: 140%; top: -20%; left: -20%; background: radial-gradient(circle at 30% 20%, rgba(255,45,138,.22), transparent 45%), radial-gradient(circle at 75% 75%, rgba(59,63,158,.25), transparent 45%); pointer-events: none; }
.cagri > * { position: relative; }
.cagri p { max-width: 32rem; margin: 1.2rem auto 2rem; color: var(--muted); font-size: 1.05rem; }

/* alt bilgi */
footer { border-top: 1px solid var(--line); padding: 4rem 0 2.5rem; }
.alt-izgara { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2.5rem; }
footer img.alt-logo { height: 34px; margin-bottom: 1.2rem; }
footer h4 { font-size: .74rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-bottom: 1.1rem; font-weight: 700; }
footer ul { list-style: none; display: grid; gap: .6rem; }
footer li a, footer p { font-size: .92rem; color: var(--muted); transition: color .2s; }
footer li a:hover { color: var(--text); }
.telif { margin-top: 3.5rem; padding-top: 1.8rem; border-top: 1px solid var(--line); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; font-size: .85rem; color: var(--muted); }

/* görünüm animasyonu */
.ac { opacity: 0; transform: translateY(26px); transition: opacity .7s cubic-bezier(.2,.8,.2,1), transform .7s cubic-bezier(.2,.8,.2,1); }
.ac.gorundu { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .ac { opacity: 1; transform: none; transition: none; }
  .serit-iz, .kaydir span { animation: none; }
  html { scroll-behavior: auto; }
}

@media (max-width: 1000px) {
  .k3, .k4, .calismalar, .surec, .sayilar { grid-template-columns: repeat(2, 1fr); }
  .adim { border-right: 0; padding-right: 0; }
  .alt-izgara { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  nav.menu {
    position: fixed; inset: 76px 0 auto; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line); padding: 1rem 24px 1.6rem; display: none;
  }
  nav.menu.acik { display: flex; }
  nav.menu a { padding: .85rem 0; font-size: 1rem; border-bottom: 1px solid var(--line); }
  .menu-btn { display: grid; place-items: center; }
  .k3, .k4, .calismalar, .surec, .sayilar, .alt-izgara { grid-template-columns: 1fr; }
  .kahraman { min-height: 100svh; padding-top: 46vh; padding-bottom: 60px; align-items: end; }
  .kahraman .kap { text-align: center; }
  .kahraman .yazi { max-width: none; }
  .kahraman .dugmeler { justify-content: center; }
  .kart { padding: 1.6rem 1.4rem; }
}