/* Ucuz Uçak Bileti Rehberi — tasarım sistemi */
:root{
  --ink:#0b1b33;
  --ink-2:#2c3e57;
  --muted:#64748b;
  --line:#e3e9f0;
  --bg:#f6f9fc;
  --surface:#ffffff;
  --brand:#0b4fa8;
  --brand-2:#1a7fd4;
  --brand-soft:#eaf3fd;
  --accent:#f59e0b;
  --accent-soft:#fff6e5;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(11,27,51,.05), 0 10px 26px -14px rgba(11,27,51,.22);
  --shadow-lg:0 2px 6px rgba(11,27,51,.06), 0 22px 48px -20px rgba(11,27,51,.3);
  --wrap:820px;
}
@media (prefers-color-scheme: dark){
  :root{
    --ink:#eaf1fa; --ink-2:#c3d2e4; --muted:#93a4ba; --line:#22344b;
    --bg:#0a1524; --surface:#0f1e31; --brand:#5aa9f0; --brand-2:#7cc0ff;
    --brand-soft:#12283f; --accent:#fbbf24; --accent-soft:#2a2213;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 10px 26px -14px rgba(0,0,0,.6);
    --shadow-lg:0 2px 6px rgba(0,0,0,.5), 0 22px 48px -20px rgba(0,0,0,.7);
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:16.5px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}
img{max-width:100%;height:auto}
::selection{background:var(--brand-soft);color:var(--ink)}

/* ---------- header ---------- */
header.site{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb,var(--surface) 88%,transparent);
  backdrop-filter:saturate(160%) blur(10px);
  -webkit-backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
}
header.site .wrap{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 22px;max-width:var(--wrap);
}
.brand{
  display:inline-flex;align-items:center;gap:9px;
  font-weight:750;color:var(--ink);text-decoration:none;
  font-size:17px;letter-spacing:-.3px;
}
.brand::before{
  content:"";width:26px;height:26px;flex:0 0 26px;border-radius:8px;
  background:linear-gradient(140deg,var(--brand),var(--brand-2));
  box-shadow:0 4px 10px -3px rgba(11,79,168,.5);
  -webkit-mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='black' d='M2 13.5 21 4l-6.2 8.1L21 20l-3.1 1.2-5.2-6.1-3.3 1.4v3.1l-2 1.6-.1-3.9L2 13.5z'/></svg>") center/16px no-repeat;
          mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='black' d='M2 13.5 21 4l-6.2 8.1L21 20l-3.1 1.2-5.2-6.1-3.3 1.4v3.1l-2 1.6-.1-3.9L2 13.5z'/></svg>") center/16px no-repeat;
}
header.site nav{display:flex;align-items:center;gap:4px}
header.site nav a{
  color:var(--ink-2);text-decoration:none;font-size:14.5px;font-weight:550;
  padding:7px 12px;border-radius:999px;transition:background .15s ease,color .15s ease;
}
header.site nav a:hover{background:var(--brand-soft);color:var(--brand)}

/* ---------- hero (index) ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(1100px 380px at 82% -20%,rgba(255,255,255,.22),transparent 60%),
    radial-gradient(700px 320px at 8% 110%,rgba(245,158,11,.28),transparent 65%),
    linear-gradient(155deg,#072c63 0%,#0b4fa8 46%,#1a7fd4 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    radial-gradient(circle at 20% 30%,rgba(255,255,255,.14) 0 1.5px,transparent 2px),
    radial-gradient(circle at 70% 62%,rgba(255,255,255,.12) 0 1.5px,transparent 2px),
    radial-gradient(circle at 45% 85%,rgba(255,255,255,.1) 0 1.5px,transparent 2px);
  background-size:260px 260px,340px 340px,200px 200px;
}
.hero .wrap{position:relative;z-index:1;padding-top:62px;padding-bottom:64px}
.hero h1{
  font-size:clamp(30px,5vw,46px);line-height:1.1;letter-spacing:-1px;
  margin:0 0 16px;max-width:15ch;text-wrap:balance;
}
.hero p.lead{
  font-size:clamp(16px,2.2vw,19px);color:rgba(255,255,255,.86);
  max-width:56ch;margin:0 0 28px;
}
.hero .eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;
  font-size:12.5px;font-weight:650;letter-spacing:.9px;text-transform:uppercase;
  color:#fff;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
  padding:6px 13px;border-radius:999px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:650;text-decoration:none;
  padding:12px 20px;border-radius:999px;transition:transform .15s ease,box-shadow .15s ease,background .15s ease;
}
.btn-primary{background:#fff;color:#0b3f86;box-shadow:0 10px 24px -10px rgba(0,0,0,.5)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px -12px rgba(0,0,0,.55)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.3)}
.btn-ghost:hover{background:rgba(255,255,255,.2)}

/* ---------- page head (inner pages) ---------- */
.page-head{
  background:linear-gradient(160deg,var(--brand-soft),transparent 80%);
  border-bottom:1px solid var(--line);
}
.page-head .wrap{padding-top:40px;padding-bottom:34px}

/* ---------- main ---------- */
main{padding:44px 0 64px}
h1{font-size:clamp(27px,4vw,36px);line-height:1.18;letter-spacing:-.7px;margin:0 0 14px;text-wrap:balance}
h2{font-size:clamp(20px,2.6vw,24px);line-height:1.3;letter-spacing:-.3px;margin:40px 0 12px}
h3{font-size:17.5px;margin:24px 0 8px;letter-spacing:-.1px}
p{margin:0 0 15px}
ul,ol{margin:0 0 18px;padding-left:22px}
li{margin:7px 0}
li::marker{color:var(--brand)}
a{color:var(--brand);text-underline-offset:2px}
a:hover{color:var(--brand-2)}
strong{font-weight:680;color:var(--ink)}
.lead{font-size:18.5px;color:var(--ink-2);margin-bottom:26px}
.meta{
  display:inline-block;font-size:13px;color:var(--muted);margin-bottom:28px;
  padding:5px 12px;border:1px solid var(--line);border-radius:999px;background:var(--surface);
}

/* ---------- section label ---------- */
h2.section-label{
  display:flex;align-items:center;gap:12px;
  font-size:13px;font-weight:700;letter-spacing:1.1px;text-transform:uppercase;
  color:var(--muted);margin:44px 0 16px;
}
h2.section-label::after{content:"";flex:1;height:1px;background:var(--line)}

/* ---------- cards ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(268px,1fr));gap:14px;margin:0 0 10px}
.card{
  position:relative;display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px 22px;box-shadow:var(--shadow);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--brand) 45%,var(--line))}
.card::before{
  content:"";position:absolute;left:22px;top:0;width:34px;height:3px;border-radius:0 0 4px 4px;
  background:linear-gradient(90deg,var(--brand),var(--accent));opacity:0;transition:opacity .18s ease;
}
.card:hover::before{opacity:1}
.card a.title{
  display:block;font-weight:680;text-decoration:none;color:var(--ink);
  font-size:17px;line-height:1.4;letter-spacing:-.2px;
}
.card a.title::after{content:"";position:absolute;inset:0}
.card:hover a.title{color:var(--brand)}
.card p{margin:8px 0 0;color:var(--muted);font-size:14.5px;line-height:1.6}
.card .tag{
  display:inline-block;align-self:flex-start;margin:0 0 10px;
  font-size:11.5px;font-weight:650;letter-spacing:.6px;text-transform:uppercase;
  color:var(--brand);background:var(--brand-soft);padding:4px 9px;border-radius:6px;
}

/* ---------- note ---------- */
.note{
  position:relative;background:var(--accent-soft);
  border:1px solid color-mix(in srgb,var(--accent) 35%,var(--line));
  border-left:4px solid var(--accent);
  border-radius:var(--radius-sm);padding:16px 20px;margin:24px 0;
}
.note p:last-child{margin-bottom:0}
.note strong{color:var(--ink)}

/* ---------- table ---------- */
table{
  width:100%;border-collapse:separate;border-spacing:0;
  margin:20px 0;font-size:15px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;box-shadow:var(--shadow);
}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line)}
th{background:color-mix(in srgb,var(--brand-soft) 70%,var(--surface));font-weight:680;font-size:13.5px;letter-spacing:.2px;color:var(--ink-2)}
tr:last-child td{border-bottom:0}
tbody tr:hover td{background:color-mix(in srgb,var(--brand-soft) 40%,var(--surface))}

/* ---------- related ---------- */
.related{
  margin-top:48px;padding:24px 24px 20px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
}
.related h2{
  font-size:12.5px;font-weight:700;text-transform:uppercase;letter-spacing:1.1px;
  color:var(--muted);margin:0 0 12px;
}
.related ul{list-style:none;padding:0;margin:0;display:grid;gap:2px}
.related li{margin:0}
.related a{
  display:flex;align-items:center;gap:10px;text-decoration:none;
  color:var(--ink-2);font-weight:550;font-size:15.5px;
  padding:10px 12px;border-radius:var(--radius-sm);transition:background .15s ease,color .15s ease;
}
.related a::before{content:"→";color:var(--brand);font-weight:700;flex:0 0 auto}
.related a:hover{background:var(--brand-soft);color:var(--brand)}

/* ---------- footer ---------- */
footer.site{
  background:var(--ink);color:rgba(255,255,255,.72);
  font-size:14px;margin-top:auto;
}
@media (prefers-color-scheme: dark){ footer.site{background:#071120} }
footer.site .wrap{padding:34px 22px;display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;align-items:center}
footer.site strong{color:#fff;font-weight:650}
footer.site a{color:rgba(255,255,255,.85);text-decoration:none}
footer.site a:hover{color:#fff}

/* ---------- responsive ---------- */
@media (max-width:560px){
  body{font-size:16px}
  .hero .wrap{padding-top:44px;padding-bottom:46px}
  main{padding:32px 0 48px}
  .grid{grid-template-columns:1fr}
  header.site nav a{padding:7px 10px}
}
@media (prefers-reduced-motion: reduce){
  *{transition:none!important;scroll-behavior:auto!important}
  .card:hover{transform:none}
}