/* ===================================================================
   MERKEZ · Atlas Tasarim Sistemi
   Inter · brand #6938EF · temiz, premium yonetim arayuzu
   =================================================================== */
:root{
  --brand:#6938EF; --brand-600:#5B2EE0; --brand-50:#F3EEFF; --brand-100:#E7DDFF;
  --ink:#15151E; --text:#2B2C3A; --muted:#6B6D85; --faint:#9A9CB2;
  --bg:#F6F6FB; --surface:#FFFFFF; --line:#E8E8F0; --line-2:#F0F0F6;
  --green:#16A34A; --green-bg:#E8F7EE; --amber:#D97706; --amber-bg:#FEF3E2;
  --red:#DC2626; --red-bg:#FDECEC; --blue:#2563EB; --blue-bg:#E8F0FE;
  --radius:14px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(20,20,40,.04),0 8px 24px rgba(20,20,40,.06);
  --sans:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--sans);background:var(--bg);color:var(--text);
  font-size:14.5px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
h1,h2,h3,h4{color:var(--ink);margin:0;letter-spacing:-.01em}
.muted{color:var(--muted)} .faint{color:var(--faint)}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}

/* ---- Layout shell ---- */
.shell{display:grid;grid-template-columns:248px 1fr;min-height:100vh}
.sidebar{background:var(--ink);color:#C9CAD9;padding:22px 16px;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#fff;font-size:17px;letter-spacing:.01em;padding:6px 8px 22px}
.brand .sq{width:12px;height:12px;border-radius:4px;background:var(--brand);box-shadow:0 0 0 4px rgba(105,56,239,.25)}
.nav-group{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:#5D5F77;margin:18px 8px 6px;font-weight:600}
.nav-item{display:flex;align-items:center;gap:11px;padding:9px 11px;border-radius:10px;color:#C9CAD9;font-weight:500;margin-bottom:2px;transition:.15s}
.nav-item:hover{background:#22222F;color:#fff}
.nav-item.active{background:var(--brand);color:#fff}
.nav-item .ico{width:18px;text-align:center;opacity:.9}
.main{display:flex;flex-direction:column;min-width:0}
.topbar{height:62px;background:var(--surface);border-bottom:1px solid var(--line);
  display:flex;align-items:center;padding:0 28px;position:sticky;top:0;z-index:20}
.topbar h1{font-size:18px}
.topbar .right{margin-left:auto;display:flex;align-items:center;gap:14px}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--brand-100);color:var(--brand-600);
  display:grid;place-items:center;font-weight:700;font-size:13px}
.content{padding:28px;max-width:1180px;width:100%}

/* ---- Cards & grid ---- */
.cards{display:grid;gap:16px}
.c4{grid-template-columns:repeat(4,1fr)} .c3{grid-template-columns:repeat(3,1fr)}
.c2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.stat .k{font-size:12px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.stat .v{font-size:28px;font-weight:800;color:var(--ink);margin-top:6px;letter-spacing:-.02em}
.stat .d{font-size:12.5px;color:var(--faint);margin-top:4px}
.card h3{font-size:15px;margin-bottom:4px}

/* ---- Badges ---- */
.badge{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;
  padding:3px 9px;border-radius:999px}
.b-green{background:var(--green-bg);color:var(--green)}
.b-amber{background:var(--amber-bg);color:var(--amber)}
.b-red{background:var(--red-bg);color:var(--red)}
.b-blue{background:var(--blue-bg);color:var(--blue)}
.b-gray{background:var(--line-2);color:var(--muted)}

/* ---- Tables ---- */
.table-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:13px 18px;border-bottom:1px solid var(--line-2)}
th{font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--faint);font-weight:600;background:#FBFBFE}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#FCFCFF}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:inherit;font-size:14px;font-weight:600;
  padding:10px 18px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;transition:.15s}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-600)}
.btn-ghost{background:var(--surface);color:var(--text);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:7px 13px;font-size:13px}
.btn-block{width:100%;justify-content:center}

/* ---- Forms ---- */
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--text);margin-bottom:6px}
.input{width:100%;font-family:inherit;font-size:14.5px;padding:11px 13px;border:1px solid var(--line);
  border-radius:var(--radius-sm);background:var(--surface);color:var(--ink);transition:.15s}
.input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(105,56,239,.12)}
select.input{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%236B6D85' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 13px center}
.hint{font-size:12.5px;color:var(--faint);margin-top:5px}

/* ---- Flash ---- */
.flash{padding:12px 16px;border-radius:var(--radius-sm);margin-bottom:16px;font-size:13.5px;font-weight:500}
.flash-success{background:var(--green-bg);color:var(--green)}
.flash-error{background:var(--red-bg);color:var(--red)}
.flash-info{background:var(--blue-bg);color:var(--blue)}

/* ---- Auth ---- */
.auth{display:grid;grid-template-columns:1fr 1fr;min-height:100vh}
.auth-brand{background:var(--ink);color:#fff;padding:56px;display:flex;flex-direction:column;
  justify-content:space-between;
  background-image:radial-gradient(700px 400px at 80% -10%,rgba(105,56,239,.35),transparent 60%)}
.auth-brand .logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:20px}
.auth-brand .logo .sq{width:13px;height:13px;border-radius:4px;background:var(--brand);box-shadow:0 0 0 5px rgba(105,56,239,.3)}
.auth-brand h2{color:#fff;font-size:34px;line-height:1.1;letter-spacing:-.02em;margin-top:auto}
.auth-brand h2 span{background:linear-gradient(100deg,#A78BFA,#5EEAD4);-webkit-background-clip:text;background-clip:text;color:transparent}
.auth-brand p{color:#9E9FB8;max-width:42ch;margin-top:16px}
.auth-form{display:flex;align-items:center;justify-content:center;padding:40px}
.auth-box{width:100%;max-width:380px}
.auth-box h1{font-size:24px;margin-bottom:6px}
.auth-box .sub{color:var(--muted);margin-bottom:26px}
.auth-box .alt{text-align:center;margin-top:20px;font-size:13.5px;color:var(--muted)}
@media(max-width:860px){.auth{grid-template-columns:1fr}.auth-brand{display:none}}

/* ---- Misc ---- */
.page-head{display:flex;align-items:center;margin-bottom:22px}
.page-head .actions{margin-left:auto;display:flex;gap:10px}
.empty{text-align:center;padding:54px 20px;color:var(--muted)}
.empty .ico{font-size:30px;margin-bottom:10px;opacity:.5}
@media(max-width:980px){.shell{grid-template-columns:1fr}.sidebar{display:none}.c4,.c3,.c2{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.c4,.c3,.c2{grid-template-columns:1fr}}