/* ============================================================
   PLANO WEB SİTESİ — ANA SAYFA TASLAK v0.1
   Referans: Brand Book v1.0 · Master Design v1.4 · Wireframe v0.2
   Varsayımlar (round'da revize edilebilir):
   - Hero ribbon çizimi 1300ms'e sıkıştırıldı (splash: 2000ms)
   - EXECUTE perdesi etkileşimli sekmeli çerçeve
   Blur bütçesi: 2 yüzey (header + CTA paneli) — limit 3
   ============================================================ */
:root{
  --bg:#0B1426;
  --plan:#0A3BFF; --execute:#00CBD7; --succeed:#00B050;
  --plan-lt:#5D85FF; --succeed-lt:#2ED573; --amber:#FFC04D;
  --txt:rgba(255,255,255,.88); --txt-dim:rgba(255,255,255,.52);
  --line:rgba(255,255,255,.09);
  --ease-out-std:cubic-bezier(.16,1,.3,1);
  --ease-in-out-soft:cubic-bezier(.65,0,.35,1);
  --ease-reactive:cubic-bezier(.2,0,0,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--txt);
  font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;
  overflow-x:hidden;line-height:1.55;
}
.wrap{max-width:1120px;margin:0 auto;padding:0 28px}
a{color:inherit;text-decoration:none}

/* ---------- ATMOSFER (onaylı splash atmosferi) ---------- */
.atmo{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.glow-blue{
  position:absolute;width:820px;height:820px;left:50%;top:-160px;transform:translateX(-50%);
  background:radial-gradient(circle,rgba(10,59,255,.16) 0%,transparent 62%);
  animation:breath 7s var(--ease-in-out-soft) infinite alternate;
}
.glow-green{
  position:absolute;width:560px;height:560px;right:-180px;top:60px;
  background:radial-gradient(circle,rgba(0,176,80,.10) 0%,transparent 60%);
  animation:drift 11s var(--ease-in-out-soft) infinite alternate;
}
@keyframes breath{from{opacity:.7;transform:translateX(-50%) scale(1)}to{opacity:1;transform:translateX(-50%) scale(1.07)}}
@keyframes drift{from{transform:translate(0,0)}to{transform:translate(-46px,36px)}}
.particle{position:absolute;width:3px;height:3px;border-radius:50%;opacity:0;animation:rise 13s linear infinite}
@keyframes rise{0%{opacity:0;transform:translateY(102vh)}12%{opacity:.5}86%{opacity:.4}100%{opacity:0;transform:translateY(-6vh)}}
.p1{left:12%;background:var(--plan-lt);animation-delay:0s}
.p2{left:31%;background:var(--execute);animation-delay:3.2s}
.p3{left:57%;background:var(--succeed-lt);animation-delay:6s}
.p4{left:74%;background:var(--plan-lt);animation-delay:1.6s}
.p5{left:89%;background:var(--execute);animation-delay:8.4s}

main{position:relative;z-index:1}

/* ---------- softEmerge (v1.1 hareket dili) ---------- */
@keyframes softEmerge{
  from{opacity:0;transform:translateY(14px) scale(.985);filter:blur(10px)}
  to{opacity:1;transform:translateY(0) scale(1);filter:blur(0)}
}
.reveal{opacity:0}
.reveal.in{animation:softEmerge 900ms var(--ease-in-out-soft) forwards}
.reveal.d1.in{animation-delay:120ms}
.reveal.d2.in{animation-delay:240ms}
.reveal.d3.in{animation-delay:360ms}

/* ---------- HEADER ---------- */
header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  background:rgba(11,20,38,.55);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--line);
}
.hd{display:flex;align-items:center;justify-content:space-between;height:66px}
.hd-brand{display:flex;align-items:center;gap:10px}
.hd-brand img.rb{height:34px;display:block}
.hd-brand img.wm{height:15px;display:block;opacity:.95}
.hd-nav{display:flex;gap:28px;font-size:13.5px;color:var(--txt-dim)}
.hd-nav a{transition:color 140ms var(--ease-reactive)}
.hd-nav a:hover{color:var(--execute)}
.hd-cta{display:flex;align-items:center;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;font-size:13.5px;font-weight:600;cursor:pointer;
  padding:9px 18px;transition:all 140ms var(--ease-reactive);border:1px solid transparent;
}
.btn-ghost{border-color:rgba(255,255,255,.18);color:var(--txt)}
.btn-ghost:hover{border-color:var(--execute);color:var(--execute)}
.btn-primary{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(135deg,#00B050,#009244);
  box-shadow:0 4px 18px rgba(0,176,80,.22);
}
.btn-primary:hover{box-shadow:0 6px 26px rgba(0,176,80,.4);transform:translateY(-1px)}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-80%;width:50%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.28),transparent);
  transform:skewX(-20deg);transition:left 480ms var(--ease-out-std);
}
.btn-primary:hover::after{left:130%}

/* ---------- HERO ---------- */
.hero{padding:158px 0 84px;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{
  font-size:clamp(34px,4.6vw,52px);font-weight:700;letter-spacing:-.025em;line-height:1.12;
}
.hero h1 .w-plan{color:var(--plan-lt)}
.hero h1 .w-exec{color:var(--execute)}
.hero h1 .w-succ{color:var(--succeed-lt)}
.hero .lede{margin-top:18px;font-size:16.5px;color:var(--txt-dim);max-width:480px}
.hero-cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.btn-lg{padding:13px 26px;font-size:15px;border-radius:12px}
.trust{margin-top:26px;font-size:12.5px;color:var(--txt-dim);display:flex;align-items:center;gap:8px}
.trust::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--amber);box-shadow:0 0 8px rgba(255,192,77,.6)}

/* Hero ribbon — kendini çizen maske (master v1.4 tekniği, sıkıştırılmış zamanlama) */
.hero-visual{display:flex;flex-direction:column;align-items:center;justify-content:center}
.hv-ribbon svg{width:auto;height:210px;display:block;opacity:0;animation:ribbonBirth 500ms var(--ease-in-out-soft) 80ms forwards}
@keyframes ribbonBirth{to{opacity:1}}
.mask-path{stroke-dasharray:100;stroke-dashoffset:100;animation:drawRibbon 1300ms var(--ease-in-out-soft) 150ms forwards}
@keyframes drawRibbon{to{stroke-dashoffset:0}}
.mask-fill{animation:maskFillIn 900ms var(--ease-in-out-soft) 1000ms forwards}
@keyframes maskFillIn{to{opacity:1}}
.hv-ribbon{/* salınım kaldırıldı (v0.3) */}
.hv-word img{height:44px;margin-top:12px;display:block;opacity:0;animation:softEmerge 900ms var(--ease-in-out-soft) 1050ms forwards}
.hv-tag img{height:25px;margin-top:2px;display:block;opacity:0;animation:softEmerge 900ms var(--ease-in-out-soft) 1400ms forwards}

/* ---------- SEKTÖR BANDI ---------- */
.sectors{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0}
.sec-inner{display:flex;align-items:center;gap:34px;overflow-x:auto;scrollbar-width:none}
.sec-inner::-webkit-scrollbar{display:none}
.sec-title{font-size:12px;letter-spacing:2px;text-transform:uppercase;color:var(--txt-dim);white-space:nowrap;flex-shrink:0}
.sec-item{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--txt-dim);white-space:nowrap;transition:color 160ms var(--ease-reactive)}
.sec-item:hover{color:var(--txt)}
.sec-item svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;opacity:.8}

/* ---------- PERDELER ---------- */
.act{padding:96px 0;position:relative}
.act-head{display:flex;align-items:baseline;gap:18px;margin-bottom:14px}
.eyebrow{
  font-size:13px;font-weight:800;letter-spacing:3px;padding:5px 13px;border-radius:99px;
  border:1px solid;background:rgba(255,255,255,.02);
}
.act-plan .eyebrow{color:var(--plan-lt);border-color:rgba(10,59,255,.45)}
.act-exec .eyebrow{color:var(--execute);border-color:rgba(0,203,215,.4)}
.act-succ .eyebrow{color:var(--succeed-lt);border-color:rgba(0,176,80,.45)}
.act h2{font-size:clamp(24px,3vw,32px);font-weight:650;letter-spacing:-.02em}
.act .sub{color:var(--txt-dim);font-size:15px;max-width:560px;margin-bottom:40px}
.act::before{
  content:"";position:absolute;left:0;top:96px;bottom:96px;width:2px;border-radius:2px;
}
.act-plan::before{background:linear-gradient(180deg,var(--plan),transparent)}
.act-exec::before{background:linear-gradient(180deg,var(--execute),transparent)}
.act-succ::before{background:linear-gradient(180deg,var(--succeed),transparent)}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.feats{display:grid;gap:22px}
.feat{display:flex;gap:14px}
.feat .ic{
  width:38px;height:38px;border-radius:10px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;border:1px solid var(--line);
}
.feat .ic svg{width:18px;height:18px;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.act-plan .feat .ic svg{stroke:var(--plan-lt)}
.act-succ .feat .ic svg{stroke:var(--succeed-lt)}
.feat b{display:block;font-size:14.5px;font-weight:600;margin-bottom:3px}
.feat p{font-size:13px;color:var(--txt-dim)}

/* Ürün kesiti çerçevesi (mock) */
.frame{
  border:1px solid var(--line);border-radius:16px;overflow:hidden;
  background:rgba(255,255,255,.018);
  box-shadow:0 24px 60px rgba(0,0,0,.35);
}
.frame-bar{display:flex;gap:6px;padding:11px 14px;border-bottom:1px solid var(--line)}
.frame-bar i{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.14)}
.frame-body{padding:18px}
.mock-row{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:9px;margin-bottom:8px;background:rgba(255,255,255,.025)}
.mock-row:last-child{margin-bottom:0}
.chk{width:15px;height:15px;border-radius:5px;border:1.5px solid rgba(255,255,255,.25);flex-shrink:0}
.chk.done{background:var(--succeed);border-color:var(--succeed);position:relative}
.chk.done::after{content:"✓";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:10px;color:#fff}
.bar{height:8px;border-radius:99px;background:rgba(255,255,255,.10)}
.pill{font-size:9.5px;font-weight:700;letter-spacing:.8px;padding:3px 8px;border-radius:99px;margin-left:auto;flex-shrink:0}
.pill.b{background:rgba(10,59,255,.18);color:var(--plan-lt)}
.pill.c{background:rgba(0,203,215,.14);color:var(--execute)}
.pill.g{background:rgba(0,176,80,.16);color:var(--succeed-lt)}
.pill.a{background:rgba(255,192,77,.14);color:var(--amber)}

/* EXECUTE — etkileşimli sekmeler */
.tabs{display:flex;gap:8px;margin-bottom:22px}
.tab{
  padding:9px 20px;border-radius:10px;font-size:13.5px;font-weight:600;cursor:pointer;
  color:var(--txt-dim);border:1px solid var(--line);background:transparent;
  transition:all 160ms var(--ease-reactive);font-family:inherit;
}
.tab:hover{color:var(--txt)}
.tab.on{color:var(--execute);border-color:rgba(0,203,215,.5);background:rgba(0,203,215,.07)}
.view{display:none}
.view.on{display:block;animation:softEmerge 380ms var(--ease-in-out-soft)}
/* Kanban mock */
.kb{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
.kb-col{border:1px solid var(--line);border-radius:12px;padding:12px;background:rgba(255,255,255,.015)}
.kb-col .kh{font-size:11px;font-weight:800;letter-spacing:2px;margin-bottom:12px;padding-bottom:9px;border-bottom:2px solid}
.kb-col.cb .kh{color:var(--plan-lt);border-color:var(--plan)}
.kb-col.cc .kh{color:var(--execute);border-color:var(--execute)}
.kb-col.cg .kh{color:var(--succeed-lt);border-color:var(--succeed)}
.card{border:1px solid var(--line);border-radius:9px;padding:10px;margin-bottom:9px;background:rgba(255,255,255,.03);font-size:12px}
.card .bar{margin-top:8px}
/* Takvim mock */
.cal{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}
.cal .dh{font-size:10px;letter-spacing:1px;color:var(--txt-dim);text-align:center;padding-bottom:6px}
.cal .day{border:1px solid var(--line);border-radius:8px;min-height:62px;padding:6px;font-size:10.5px;color:var(--txt-dim);background:rgba(255,255,255,.015)}
.ev{border-radius:5px;font-size:9px;font-weight:600;padding:2.5px 6px;margin-top:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ev.b{background:rgba(10,59,255,.22);color:var(--plan-lt)}
.ev.c{background:rgba(0,203,215,.16);color:var(--execute)}
.ev.g{background:rgba(0,176,80,.2);color:var(--succeed-lt)}

/* SUCCEED — KPI halka */
.ring-wrap{display:flex;align-items:center;gap:26px;border:1px solid var(--line);border-radius:16px;padding:26px;background:rgba(255,255,255,.018)}
.ring-svg{width:118px;height:118px;flex-shrink:0}
.ring-bg{fill:none;stroke:rgba(255,255,255,.08);stroke-width:7}
.ring-fg{
  fill:none;stroke:url(#ringGrad);stroke-width:7;stroke-linecap:round;
  stroke-dasharray:163.4;stroke-dashoffset:163.4;
  transform:rotate(-90deg);transform-origin:center;
}
.ring-wrap.go .ring-fg{animation:ringFill 1200ms var(--ease-out-std) forwards}
@keyframes ringFill{to{stroke-dashoffset:22.9}}
.ring-num{font-size:26px;font-weight:750;fill:#fff}
.ring-txt b{display:block;font-size:16px;font-weight:650;margin-bottom:4px}
.ring-txt p{font-size:13px;color:var(--txt-dim)}
.kpis{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}
.kpi{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:rgba(255,255,255,.018)}
.kpi .n{font-size:22px;font-weight:750}
.kpi .l{font-size:12px;color:var(--txt-dim);margin-top:2px}
.kpi.b .n{color:var(--plan-lt)}.kpi.c .n{color:var(--execute)}.kpi.g .n{color:var(--succeed-lt)}.kpi.a .n{color:var(--amber)}

/* ---------- SHOWCASE ---------- */
.showcase{padding:40px 0 96px;text-align:center}
.showcase h2{font-size:clamp(22px,2.6vw,28px);font-weight:650;letter-spacing:-.02em;margin-bottom:10px}
.showcase .sub{color:var(--txt-dim);font-size:14.5px;margin-bottom:40px}
.dash{
  border:1px solid var(--line);border-radius:18px;overflow:hidden;text-align:left;
  background:rgba(255,255,255,.015);box-shadow:0 34px 90px rgba(0,0,0,.45);
  display:grid;grid-template-columns:60px 1fr;
}
.dash-nav{border-right:1px solid var(--line);padding:16px 0;display:flex;flex-direction:column;align-items:center;gap:16px}
.dash-nav img{height:26px}
.dn{width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;color:var(--txt-dim)}
.dn.on{color:var(--execute);background:rgba(0,203,215,.08);box-shadow:inset 2px 0 0 var(--execute)}
.dn svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round}
.dash-main{padding:20px 24px}
.dash-hello{font-size:15px;font-weight:650;margin-bottom:16px}
.dash-hello span{color:var(--txt-dim);font-weight:400;font-size:12px;margin-left:10px}
.dash-cols{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;margin-top:14px}
.dc{border:1px solid var(--line);border-radius:12px;padding:12px;background:rgba(255,255,255,.015)}
.dc .kh{font-size:10.5px;font-weight:800;letter-spacing:2px;margin-bottom:10px;padding-bottom:8px;border-bottom:2px solid}
.dc.cb .kh{color:var(--plan-lt);border-color:var(--plan)}
.dc.cc .kh{color:var(--execute);border-color:var(--execute)}
.dc.cg .kh{color:var(--succeed-lt);border-color:var(--succeed)}

/* ---------- CTA ---------- */
.cta{padding:96px 0}
.cta-panel{
  border:1px solid var(--line);border-radius:20px;padding:52px 48px;
  background:rgba(255,255,255,.012);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;position:relative;overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;right:-140px;top:-140px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(0,203,215,.09),transparent 65%);pointer-events:none;
}
.cta h2{font-size:clamp(22px,2.8vw,30px);font-weight:650;letter-spacing:-.02em}
.cta p{color:var(--txt-dim);font-size:14.5px;margin-top:10px}
.cta-form{display:flex;gap:10px}
.cta-form input{
  flex:1;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.14);border-radius:12px;
  padding:13px 16px;color:var(--txt);font-size:14px;font-family:inherit;outline:none;
  transition:all 180ms var(--ease-reactive);min-width:0;
}
.cta-form input:focus{border-color:var(--plan);box-shadow:0 0 0 3px rgba(10,59,255,.12)}
.cta-note{font-size:11.5px;color:var(--txt-dim);margin-top:12px}

/* Erken erişim formu — durum mesajları + KVKK (Faz 4 / W19–W22) */
.cta-kvkk{display:flex;align-items:flex-start;gap:9px;margin-top:14px;font-size:12px;line-height:1.5;color:var(--txt-dim)}
.cta-kvkk input{
  appearance:none;-webkit-appearance:none;flex-shrink:0;width:16px;height:16px;margin-top:2px;
  border:1px solid rgba(255,255,255,.25);border-radius:5px;background:rgba(255,255,255,.03);
  cursor:pointer;transition:all 180ms var(--ease-reactive);
}
.cta-kvkk input:checked{
  background-color:var(--succeed);border-color:var(--succeed);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size:12px;background-position:center;background-repeat:no-repeat;
}
.cta-kvkk input:focus-visible{outline:none;border-color:var(--plan);box-shadow:0 0 0 3px rgba(10,59,255,.12)}
.cta-kvkk label{cursor:pointer}
.cta-kvkk a{color:var(--txt);text-decoration:underline;text-underline-offset:2px}
.cta-form[hidden],.cta-kvkk[hidden]{display:none} /* display:flex, [hidden]'ı ezmesin */
.cta-msg{margin-top:12px;font-size:13px;animation:softEmerge 380ms var(--ease-in-out-soft)}
.cta-msg.ok{color:var(--succeed)}
.cta-msg.warn{color:var(--amber)}

/* ---------- FOOTER ---------- */
footer{border-top:1px solid var(--line);padding:52px 0 40px}
.ft{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:36px;align-items:start}
.ft-lockup img.rb{height:64px;display:block}
.ft-lockup img.wm{height:22px;display:block;margin-top:8px}
.ft-lockup img.tg{height:12px;display:block;margin-top:2px}
.ft h3{font-size:12px;letter-spacing:2px;text-transform:uppercase;color:var(--txt-dim);margin-bottom:14px}
.ft a{display:block;font-size:13.5px;color:var(--txt-dim);margin-bottom:9px;transition:color 140ms var(--ease-reactive)}
.ft a:hover{color:var(--execute)}
.ft-base{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:12px;color:var(--txt-dim);flex-wrap:wrap;gap:8px}

/* ---------- RESPONSIVE ---------- */
@media(max-width:900px){
  .hero{grid-template-columns:1fr;padding-top:120px;text-align:center}
  .hero .lede{margin-left:auto;margin-right:auto}
  .hero-cta{justify-content:center}
  .trust{justify-content:center}
  .hero-visual{order:-1}
  .hv-ribbon svg{height:150px}
  .grid2{grid-template-columns:1fr}
  .cta-panel{grid-template-columns:1fr;padding:36px 26px}
  .ft{grid-template-columns:1fr;gap:28px}
  .hd-nav{display:none}
  .kb{grid-template-columns:1fr}
  .cal{grid-template-columns:repeat(4,1fr)}
  .cal .dh:nth-child(n+5),.cal .day:nth-child(n+12){display:none}
  .dash{grid-template-columns:1fr}
  .dash-nav{flex-direction:row;border-right:none;border-bottom:1px solid var(--line);padding:12px}
  .dash-cols{grid-template-columns:1fr}
  .kpis{grid-template-columns:1fr}
}

/* Mobil: KVKK satırı dokunma hedefi ≥44px (Apple HIG) — yalnız padding, tipografi değişmez */
@media(max-width:480px){
  .cta-kvkk label{padding:5px 0}
  .cta-kvkk input{margin-top:7px} /* 2px + label padding-top; ilk satırla hiza korunur */
}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-delay:0ms !important;transition-duration:.01ms !important}
  .reveal{opacity:1}
  .mask-path{stroke-dashoffset:0}
  .mask-fill{opacity:1}
  .hv-ribbon svg,.hv-word img,.hv-tag img{opacity:1}
  .ring-fg{stroke-dashoffset:22.9}
}

/* Erişilebilirlik: yalnızca ekran okuyucuya görünen içerik (Faz 3 / W16) */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* Yasal sayfalar + 404 (Faz 5 / W23–W26) — atmosfer yok, tipografik düzen */
.yasal{max-width:720px;margin:0 auto;padding:150px 28px 90px}
.yasal h1{
  font-size:clamp(26px,3.2vw,34px);font-weight:700;letter-spacing:-.02em;line-height:1.2;
  opacity:0;animation:softEmerge 900ms var(--ease-in-out-soft) forwards;
}
.yasal .tarih{margin-top:10px;font-size:12.5px;color:var(--txt-dim)}
.yasal h2{font-size:17px;font-weight:650;letter-spacing:-.01em;margin:34px 0 10px}
.yasal p{font-size:14.5px;color:var(--txt-dim);line-height:1.75;margin-bottom:12px}
.yasal .don{display:inline-block;margin-top:36px;font-size:13.5px;color:var(--txt);border-bottom:1px solid var(--line);transition:color 140ms var(--ease-reactive)}
.yasal .don:hover{color:var(--execute)}
.sayfa404{
  max-width:720px;margin:0 auto;padding:0 28px;min-height:calc(100vh - 66px);
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
}
.sayfa404 h1{
  font-size:clamp(26px,3.6vw,38px);font-weight:700;letter-spacing:-.02em;
  opacity:0;animation:softEmerge 900ms var(--ease-in-out-soft) forwards;
}
.sayfa404 p{margin-top:14px;font-size:15px;color:var(--txt-dim)}
.sayfa404 .btn{margin-top:30px}