/* ==========================================================
   StuNext — Ortak tasarım sistemi (tanıtım, panel, admin)
   Açık renk, profesyonel, modern
   ========================================================== */
:root{
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --surface-2:#F9FAFD;
  --line:#E6E9F2;
  --line-2:#D8DDEA;
  --ink:#0B2349;
  --ink-2:#48536F;
  --ink-3:#7A849C;
  --primary:#1D5FD1;
  --primary-2:#1FA3DB;
  --primary-soft:#EAF2FD;
  --primary-ink:#15449E;
  --accent:#0FB5A6;
  --ok:#12966A;   --ok-soft:#E6F6EF;
  --warn:#B7791F; --warn-soft:#FDF4E3;
  --bad:#D64545;  --bad-soft:#FDECEC;
  --grad:linear-gradient(135deg,#1A4FC2 0%,#1FA3DB 100%);
  --r-sm:10px; --r:14px; --r-lg:20px; --r-xl:28px;
  --sh-1:0 1px 2px rgba(14,23,51,.06),0 1px 1px rgba(14,23,51,.04);
  --sh-2:0 6px 20px -6px rgba(14,23,51,.12),0 2px 6px rgba(14,23,51,.05);
  --sh-3:0 24px 60px -18px rgba(30,40,110,.28),0 8px 18px -8px rgba(14,23,51,.10);
  --font:"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--ink);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.02em}
p{margin:0}
button{font-family:inherit}
.muted{color:var(--ink-3)}
.small{font-size:13px}
.hidden{display:none!important}
.row{display:flex;align-items:center;gap:10px}
.row.wrap{flex-wrap:wrap}
.spacer{flex:1}
.stack{display:flex;flex-direction:column;gap:12px}
.container{max-width:1160px;margin:0 auto;padding:0 20px}

/* ---------- Brand ---------- */
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink);letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand-mark{width:38px;height:38px;object-fit:contain;flex:none;filter:drop-shadow(0 4px 8px rgba(29,95,209,.25))}
.brand b{font-weight:800}
.brand b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:42px;padding:0 18px;border-radius:12px;border:1px solid var(--line-2);background:var(--surface);color:var(--ink);font-weight:600;font-size:14.5px;cursor:pointer;transition:transform .15s,box-shadow .2s,background .2s,border-color .2s;white-space:nowrap;text-decoration:none!important}
.btn:hover{border-color:#C5CCE0;box-shadow:var(--sh-1)}
.btn:active{transform:scale(.98)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-primary{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 8px 18px -8px rgba(29,95,209,.7)}
.btn-primary:hover{box-shadow:0 12px 24px -8px rgba(29,95,209,.75);border-color:transparent}
.btn-soft{background:var(--primary-soft);border-color:transparent;color:var(--primary-ink)}
.btn-ghost{background:transparent;border-color:transparent;color:var(--ink-2)}
.btn-ghost:hover{background:#EEF1F7;box-shadow:none}
.btn-danger{background:var(--bad-soft);border-color:transparent;color:var(--bad)}
.btn-ok{background:var(--ok-soft);border-color:transparent;color:var(--ok)}
.btn-warn{background:var(--warn-soft);border-color:transparent;color:var(--warn)}
.btn-sm{height:34px;padding:0 12px;font-size:13px;border-radius:10px}
.btn-lg{height:52px;padding:0 26px;font-size:16px;border-radius:14px}
.btn-block{width:100%}
.icon-btn{width:34px;height:34px;padding:0;border-radius:10px}

/* ---------- Forms ---------- */
.field{display:flex;flex-direction:column;gap:6px}
.field>label,.label{font-size:13px;font-weight:600;color:var(--ink-2)}
.input,.select,.textarea{width:100%;height:44px;border:1px solid var(--line-2);border-radius:12px;background:#fff;padding:0 14px;font:inherit;color:var(--ink);transition:border-color .2s,box-shadow .2s;outline:none}
.textarea{height:auto;min-height:90px;padding:12px 14px;resize:vertical}
.input:focus,.select:focus,.textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(29,95,209,.12)}
.input::placeholder,.textarea::placeholder{color:#A3ABBF}
.hint{font-size:12.5px;color:var(--ink-3)}
.check{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:var(--ink-2);cursor:pointer}
.check input{margin-top:3px;width:17px;height:17px;accent-color:var(--primary);flex:none}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:560px){.grid-2{grid-template-columns:1fr}}

/* switch */
.switch{position:relative;width:44px;height:26px;flex:none;display:inline-block}
.switch input{opacity:0;width:0;height:0;position:absolute}
.switch span{position:absolute;inset:0;background:#D5DAE7;border-radius:99px;cursor:pointer;transition:background .2s}
.switch span::after{content:"";position:absolute;left:3px;top:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.2);transition:transform .2s}
.switch input:checked+span{background:var(--primary)}
.switch input:checked+span::after{transform:translateX(18px)}
.switch input:focus-visible+span{box-shadow:0 0 0 4px rgba(29,95,209,.2)}

/* ---------- Cards ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1)}
.card-pad{padding:22px}
.card-h{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:18px 22px;border-bottom:1px solid var(--line)}
.card-h h3{font-size:16px}

/* ---------- Badges ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:99px;font-size:12px;font-weight:700;background:#EEF1F7;color:var(--ink-2);white-space:nowrap}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.badge.ok{background:var(--ok-soft);color:var(--ok)}
.badge.warn{background:var(--warn-soft);color:var(--warn)}
.badge.bad{background:var(--bad-soft);color:var(--bad)}
.badge.info{background:var(--primary-soft);color:var(--primary-ink)}
.badge.plain::before{display:none}

/* ---------- Alerts ---------- */
.alert{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:14px;font-size:14px;border:1px solid transparent}
.alert.info{background:var(--primary-soft);color:var(--primary-ink);border-color:#DCE2FF}
.alert.warn{background:var(--warn-soft);color:#8A5A12;border-color:#F3E1BD}
.alert.bad{background:var(--bad-soft);color:#A12E2E;border-color:#F6CFCF}
.alert.ok{background:var(--ok-soft);color:#0C6B4B;border-color:#C6EAD9}

/* ---------- Tabs ---------- */
.tabs{display:flex;gap:4px;padding:4px;background:#EBEEF6;border-radius:14px;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{flex:none;height:38px;padding:0 16px;border:0;border-radius:10px;background:transparent;color:var(--ink-2);font-weight:600;font-size:14px;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:background .2s,color .2s}
.tab:hover{color:var(--ink)}
.tab.active{background:#fff;color:var(--ink);box-shadow:var(--sh-1)}
.tab .count{background:var(--bad);color:#fff;font-size:11px;min-width:18px;height:18px;border-radius:99px;display:inline-grid;place-items:center;padding:0 5px}

/* ---------- Toast ---------- */
.toast-wrap{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);z-index:9999;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;width:calc(100% - 32px);max-width:420px}
.toast{background:#101935;color:#fff;padding:12px 18px;border-radius:14px;font-size:14px;font-weight:500;box-shadow:var(--sh-3);animation:toastIn .3s ease;pointer-events:auto;text-align:center}
.toast.ok{background:#0F7A56}.toast.bad{background:#B83333}
@keyframes toastIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------- Modal ---------- */
.modal-bg{position:fixed;inset:0;background:rgba(14,23,51,.42);backdrop-filter:blur(4px);z-index:900;display:grid;place-items:center;padding:16px;animation:fade .2s}
.modal{background:#fff;border-radius:var(--r-xl);width:100%;max-width:460px;box-shadow:var(--sh-3);padding:26px;animation:pop .25s cubic-bezier(.2,.9,.3,1.2);max-height:calc(100vh - 32px);overflow:auto}
.modal h3{font-size:19px;margin-bottom:6px}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:scale(.95) translateY(8px)}to{opacity:1;transform:none}}

/* ---------- Table ---------- */
.table-wrap{overflow-x:auto}
table.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th{text-align:left;font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-3);font-weight:700;padding:12px 16px;background:var(--surface-2);border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl tr:last-child td{border-bottom:0}
.tbl tr:hover td{background:#FAFBFE}

/* ---------- Misc ---------- */
.divider{height:1px;background:var(--line);margin:18px 0}
.empty{padding:48px 20px;text-align:center;color:var(--ink-3)}
.empty .em-ic{width:56px;height:56px;border-radius:18px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;margin:0 auto 12px}
.spinner{width:22px;height:22px;border-radius:50%;border:3px solid #DDE2F0;border-top-color:var(--primary);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.demo-bar{position:sticky;top:0;z-index:950;background:#FFF7E6;color:#7A4F0A;border-bottom:1px solid #F1DDB0;font-size:13px;text-align:center;padding:8px 14px}
.kbd{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12.5px;background:#EEF1F7;border:1px solid var(--line);border-radius:6px;padding:1px 6px}
.copy-line{display:flex;align-items:center;gap:8px;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:6px 6px 6px 12px}
.copy-line code{flex:1;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink-2)}