:root {
  --gece: #0f1d33; --lacivert: #17294a; --lacivert2: #22406e; --buz: #e9f0f7;
  --amber: #f5b63d; --amber-koyu: #c98a14; --turuncu: #ef6a2c; --turuncu-koyu: #b4441a;
  --kraft: #d9bf91; --kagit: #fffaf0; --gri: #5f6b7a; --yesil: #1f8a4c; --ekran: #0c1a12; --led: #9cf27a;
  --yazi: 'Archivo', system-ui, sans-serif; --mono: 'JetBrains Mono', ui-monospace, monospace;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--yazi); color: var(--gece); line-height: 1.45; min-height: 100vh;
  background-color: var(--buz);
  background-image: repeating-linear-gradient(90deg, transparent 0 46px, rgba(23,41,74,.05) 46px 52px);
}
a { color: var(--turuncu-koyu); }

/* Başlık: kombi gövdesi */
.ust {
  max-width: 560px; margin: 0 auto; padding: 26px 22px 30px; text-align: center; color: var(--kagit);
  background: radial-gradient(120% 90% at 50% 0%, var(--lacivert2), var(--gece));
  border-radius: 0 0 30px 30px; box-shadow: 0 16px 30px rgba(15,29,51,.25);
}
.rozet {
  display: inline-block; margin: 0; padding: 5px 12px; border-radius: 999px; font-weight: 700; font-size: 13px;
  letter-spacing: .08em; text-transform: uppercase; color: var(--gece); background: var(--amber);
}
.ust h1 { margin: 16px 0 8px; font-size: clamp(36px, 10vw, 50px); line-height: .98; font-weight: 900; letter-spacing: -.02em; }
.ust h1 span { display: block; color: var(--amber); }
.soz { margin: 8px auto 0; max-width: 420px; font-size: 16px; opacity: .9; }

main { max-width: 560px; margin: 0 auto; padding: 18px 14px 40px; }
.kart { background: #fff; border-radius: 22px; padding: 18px; margin: 16px 0; box-shadow: 0 6px 0 rgba(23,41,74,.1); border: 2px solid rgba(23,41,74,.08); }
h2 { margin: 0 0 10px; font-size: 21px; font-weight: 800; }

.ikili { display: grid; grid-template-columns: 1.3fr 1fr; gap: 10px; }
.alan { display: block; margin: 0 0 18px; border: 0; padding: 0; min-width: 0; }
.etiket { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; font-weight: 700; font-size: 16px; margin-bottom: 8px; }
.etiket em { font-style: normal; font-weight: 500; color: var(--gri); font-size: 14px; }
.deger { font-family: var(--mono); color: var(--turuncu-koyu); font-size: 17px; }
input, select, textarea, button { font: inherit; color: inherit; }
select { width: 100%; border: 2.5px solid var(--lacivert); border-radius: 14px; padding: 12px 12px; font-size: 17px; font-weight: 700; background: #fff; }
select:focus { outline: none; box-shadow: 0 0 0 4px rgba(245,182,61,.55); }
small { display: block; margin-top: 6px; color: var(--gri); font-size: 14px; }
.hata { color: var(--turuncu-koyu); font-weight: 700; }

input[type="range"] { width: 100%; height: 34px; accent-color: var(--turuncu); margin: 0; }

.secim { display: grid; gap: 8px; }
.secim.uclu { grid-template-columns: repeat(3, 1fr); }
.secim label { position: relative; }
.secim input { position: absolute; opacity: 0; }
.secim span { display: block; height: 100%; text-align: center; padding: 10px 4px; border: 2.5px solid var(--lacivert); border-radius: 14px; font-weight: 800; font-size: 15px; background: #fff; cursor: pointer; }
.secim span small { margin-top: 2px; font-size: 12px; font-weight: 500; line-height: 1.2; }
.secim input:checked + span { background: var(--lacivert); color: var(--kagit); }
.secim input:checked + span small { color: rgba(255,250,240,.8); }
.secim input:focus-visible + span { box-shadow: 0 0 0 4px rgba(245,182,61,.55); }

/* Kombi ekranı */
.kombi { display: grid; grid-template-columns: 64px 1fr 64px; gap: 12px; align-items: center; }
.tus {
  height: 64px; border-radius: 50%; border: 0; font-size: 34px; font-weight: 800; cursor: pointer; color: var(--gece);
  background: radial-gradient(circle at 35% 30%, #fff, #c9d3df); box-shadow: 0 5px 0 #8796a8, 0 8px 14px rgba(0,0,0,.15);
}
.tus:active { transform: translateY(3px); box-shadow: 0 2px 0 #8796a8; }
.tus:disabled { opacity: .4; cursor: default; }
.tus:focus-visible { outline: 4px solid var(--amber); }
.ekran {
  position: relative; text-align: center; padding: 12px 8px 10px; border-radius: 18px; color: var(--led);
  background: linear-gradient(180deg, #13261a, var(--ekran)); box-shadow: inset 0 0 0 3px #26402e, inset 0 6px 16px rgba(0,0,0,.6);
}
.ekran output { font-family: var(--mono); font-weight: 700; font-size: 58px; line-height: 1; text-shadow: 0 0 14px rgba(156,242,122,.55); }
.ekran .birim { font-family: var(--mono); font-size: 22px; vertical-align: top; margin-left: 2px; }
.ekran small { color: rgba(156,242,122,.7); margin-top: 2px; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; }
.alev { position: absolute; left: 12px; top: 10px; font-size: 18px; }

details.ek { border-top: 2px dashed rgba(23,41,74,.2); padding-top: 10px; }
details summary { cursor: pointer; font-weight: 700; color: var(--lacivert2); padding: 4px 0; }
details.ek[open] summary { margin-bottom: 12px; }
.tl-kutu { display: flex; align-items: stretch; border: 2.5px solid var(--lacivert); border-radius: 14px; overflow: hidden; background: #fff; }
.tl-kutu input { flex: 1; min-width: 0; border: 0; padding: 12px 14px; font-size: 20px; font-weight: 700; outline: none; background: transparent; }
.tl-kutu b { display: grid; place-items: center; padding: 0 12px; background: var(--lacivert); color: var(--kagit); font-size: 15px; }
.tl-kutu:focus-within { box-shadow: 0 0 0 4px rgba(245,182,61,.55); }

/* Fatura fişi */
.fatura {
  position: relative; margin: 22px 4px 18px; padding: 20px 20px 22px; background: var(--kagit); text-align: center;
  border-radius: 6px; box-shadow: 0 14px 24px rgba(15,29,51,.18); border-top: 8px solid var(--turuncu);
}
.fatura::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -10px; height: 10px;
  background: radial-gradient(circle at 8px 0, var(--kagit) 7px, transparent 7.5px) 0 0 / 16px 10px repeat-x;
}
.fatura-ust { margin: 0; font-family: var(--mono); font-size: 13px; color: var(--gri); text-transform: uppercase; letter-spacing: .06em; }
.fatura-etiket { margin: 10px 0 0; font-weight: 700; }
.tutar { margin: 2px 0; font-weight: 900; font-size: clamp(42px, 13vw, 60px); line-height: 1.05; letter-spacing: -.02em; }
.m3 { margin: 0; font-size: 17px; }
.m3 b { font-family: var(--mono); }
.cizgi { border-top: 2px dashed rgba(23,41,74,.25); margin: 16px 0 14px; }
.limit { text-align: left; }
.limit-ust { display: flex; justify-content: space-between; font-weight: 700; }
.limit-ust b { font-family: var(--mono); }
.bar { height: 14px; margin: 8px 0; border-radius: 999px; background: #e3e8ee; overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: var(--yesil); border-radius: 999px; transition: width .3s; }
.bar i.yakin { background: var(--amber-koyu); }
.bar i.asti { background: var(--turuncu-koyu); }
.limit p { margin: 0; font-size: 15px; color: var(--gri); }

/* 1 derece kartı */
.kis-kart {
  margin: 16px 0; padding: 20px; border-radius: 22px; color: var(--kagit); text-align: center;
  background: linear-gradient(135deg, var(--lacivert2), var(--gece)); box-shadow: 0 8px 0 rgba(15,29,51,.2);
}
.kis-ust { margin: 0; font-size: 18px; }
.kis-ust b { font-family: var(--mono); color: var(--amber); font-size: 22px; }
.kis-tutar { margin: 6px 0 4px; font-size: 20px; }
.kis-tutar b { display: block; font-size: clamp(40px, 12vw, 54px); font-weight: 900; color: var(--amber); line-height: 1.05; }
.kis-alt { margin: 6px 0 0; font-size: 15px; opacity: .9; }

.tablo-kap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 16px; }
th, td { padding: 9px 8px; text-align: right; border-bottom: 1px solid #e3e8ee; }
th:first-child, td:first-child { text-align: left; }
td { font-family: var(--mono); }
th { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--gri); }
tr.secili td { background: #fff3d6; font-weight: 700; }
tr.k2 td:last-child { color: var(--turuncu-koyu); }

.hesap ol { margin: 0; padding-left: 20px; }
.hesap li { margin-bottom: 8px; }
.ipucu ul { margin: 0; padding-left: 20px; }
.ipucu li { margin-bottom: 8px; }
.bilgi p { margin: 0 0 10px; }
.kaynak { font-size: 14px; color: var(--gri); margin: 10px 0 0; }
.uyari-not { background: var(--lacivert); color: var(--kagit); border-radius: 16px; padding: 14px 16px; font-size: 15px; margin: 16px 0; }
.altnot { text-align: center; font-size: 14px; color: var(--gri); margin-top: 22px; }

@media (max-width: 380px) {
  .ikili { grid-template-columns: 1fr; }
  .kombi { grid-template-columns: 54px 1fr 54px; }
  .tus { height: 54px; }
  .ekran output { font-size: 48px; }
}