:root {
  --ink: #152238;
  --muted: #5d6b7c;
  --line: #d9e0ea;
  --bg: #eef2f7;
  --card: #f7f9fc;
  --navy: #0f2a4a;
  --gold: #c6a15a;
  --blue: #1f6feb;
  --ok: #1b7a4a;
  --err: #b42318;
  --shadow: 8px 8px 18px #c8d0dc, -8px -8px 18px #ffffff;
  --inset: inset 6px 6px 12px #c8d0dc, inset -6px -6px 12px #ffffff;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", system-ui, sans-serif; color: var(--ink); background: var(--bg); }
a { color: var(--blue); text-decoration: none; }
.kurulum-govde, .auth-govde {
  min-height: 100vh; display: grid; place-items: center; padding: 24px;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,.9), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(198,161,90,.18), transparent 35%),
    var(--bg);
}
.kurulum-kart, .auth-kart {
  width: min(460px, 100%); padding: 28px; border-radius: 28px;
  background: var(--card); box-shadow: var(--shadow); position: relative;
}
.kurulum-kart::before, .auth-kart::before {
  content: ""; position: absolute; inset: -1px; border-radius: 29px; padding: 1px;
  background: conic-gradient(from var(--spin, 0deg), transparent 0 70%, var(--gold), var(--navy), transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  animation: spin 4s linear infinite; pointer-events: none;
}
@property --spin { syntax: "<angle>"; inherits: false; initial-value: 0deg; }
@keyframes spin { to { --spin: 360deg; } }
.logo { display: block; width: 160px; margin: 0 auto 16px; }
h1 { margin: 0 0 8px; font-size: 28px; text-align: center; }
h2 { margin: 0 0 12px; font-size: 20px; }
.lead { color: var(--muted); text-align: center; margin: 0 0 18px; }
.form { display: grid; gap: 12px; }
label { display: grid; gap: 6px; font-size: 12px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
input, select, textarea {
  width: 100%; border: 0; border-radius: 14px; padding: 12px 14px;
  background: var(--bg); box-shadow: var(--inset); color: var(--ink); font: inherit; text-transform: none;
}
.check { display: flex; align-items: center; gap: 8px; text-transform: none; font-weight: 600; }
.btn {
  display: inline-flex; justify-content: center; align-items: center; gap: 8px;
  border: 0; border-radius: 14px; padding: 12px 16px; font-weight: 800; letter-spacing: .04em;
  background: var(--card); color: var(--blue); box-shadow: var(--shadow); cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.btn.ana { background: var(--navy); color: #fff; box-shadow: 0 10px 24px rgba(15,42,74,.28); }
.hata, .not, .uyari { border-radius: 12px; padding: 10px 12px; margin-bottom: 12px; font-size: 14px; }
.hata { background: #fde8e6; color: var(--err); }
.not { background: #e8f7ef; color: var(--ok); }
.gerek { list-style: none; padding: 0; margin: 0 0 16px; display: grid; gap: 8px; }
.gerek li { padding: 10px 12px; border-radius: 12px; background: #fff; box-shadow: var(--shadow); }
.gerek .ok::before { content: "✓ "; color: var(--ok); font-weight: 800; }
.gerek .yok::before { content: "✕ "; color: var(--err); font-weight: 800; }
.fine { color: var(--muted); font-size: 12px; }
.alt { text-align: center; margin-top: 18px; }
.auth-switch { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 16px; padding: 4px; border-radius: 14px; background: #e7ebf2; }
.auth-switch a { text-align: center; padding: 10px; border-radius: 11px; color: var(--muted); font-weight: 700; }
.auth-switch a.on { background: var(--navy); color: #fff; }

.shell { display: grid; grid-template-columns: 250px 1fr; min-height: 100vh; }
.yan { background: linear-gradient(180deg, #0d213d, #16345c); color: #f4efe4; padding: 20px 14px; }
.yan .mark { display: block; width: 140px; margin: 0 auto 18px; background: #fff; border-radius: 12px; padding: 8px; }
.yan nav { display: grid; gap: 4px; }
.yan a { color: rgba(255,255,255,.78); padding: 10px 12px; border-radius: 10px; font-weight: 600; }
.yan a:hover, .yan a.aktif { background: rgba(255,255,255,.1); color: #fff; }
.ust { display: flex; justify-content: space-between; align-items: center; padding: 16px 22px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.7); backdrop-filter: blur(8px); }
.icerik { padding: 22px; }
.kartlar { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; margin: 16px 0; }
.kart { background: var(--card); border-radius: 18px; padding: 16px; box-shadow: var(--shadow); position: relative; overflow: hidden; }
.kart::after {
  content: ""; position: absolute; inset: 0; border-radius: 18px; padding: 1px;
  background: conic-gradient(from var(--spin,0deg), transparent 55%, rgba(198,161,90,.8), transparent 85%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; animation: spin 5s linear infinite; pointer-events: none;
}
.kart .k { color: var(--muted); font-size: 12px; font-weight: 700; text-transform: uppercase; }
.kart .v { font-size: 28px; font-weight: 800; margin-top: 6px; }
.tablo { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); }
.tablo th, .tablo td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; font-size: 14px; }
.tablo th { background: #e8eef7; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.bos { padding: 28px; text-align: center; color: var(--muted); }
.gantt { overflow-x: auto; background: var(--card); border-radius: 16px; box-shadow: var(--shadow); padding: 14px; }
.gantt-row { display: grid; grid-template-columns: 200px 1fr; gap: 10px; align-items: center; margin-bottom: 10px; }
.gantt-bar-wrap { position: relative; height: 28px; background: #e7ebf2; border-radius: 999px; }
.gantt-bar { position: absolute; top: 0; bottom: 0; border-radius: 999px; background: linear-gradient(90deg, #16345c, #c6a15a); color: #fff; font-size: 11px; display: flex; align-items: center; padding: 0 10px; white-space: nowrap; }
.ilerleme { height: 8px; background: #e7ebf2; border-radius: 99px; overflow: hidden; }
.ilerleme > span { display: block; height: 100%; background: linear-gradient(90deg, #1f6feb, #c6a15a); }
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .yan { position: sticky; top: 0; z-index: 5; }
}