/* ===========================================================
   Caissa OS - estilos
   =========================================================== */
:root{
  --bg:#f4f6fb; --panel:#ffffff; --ink:#1c2433; --muted:#6b7689;
  --line:#e3e8f0; --brand:#2f56d6; --brand-dark:#2342ad;
  --green:#1f9d63; --amber:#c98a14; --red:#d2453b; --slate:#64748b;
  --radius:12px; --shadow:0 1px 3px rgba(20,30,60,.08),0 6px 20px rgba(20,30,60,.05);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.5}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.25;margin:0 0 .5em}
h1{font-size:1.5rem}
h2{font-size:1.2rem}
small{color:var(--muted)}

/* Topbar */
.topbar{display:flex;align-items:center;gap:24px;background:var(--panel);border-bottom:1px solid var(--line);padding:0 24px;height:60px;position:sticky;top:0;z-index:10}
.brand{font-weight:800;font-size:1.25rem;color:var(--ink)}
.brand span{color:var(--brand)}
.mainnav{display:flex;gap:4px;flex:1}
.mainnav a{padding:8px 14px;border-radius:8px;color:var(--muted);font-weight:600;font-size:.92rem}
.mainnav a:hover{background:var(--bg);text-decoration:none;color:var(--ink)}
.mainnav a.active{background:#eef2fe;color:var(--brand)}
.usermenu{display:flex;align-items:center;gap:12px}
.userchip{display:flex;align-items:center;gap:10px;color:var(--ink)}
.userchip:hover{text-decoration:none}
.avatar{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--brand);color:#fff;font-weight:700}
.uinfo{display:flex;flex-direction:column;line-height:1.1}
.uinfo small{font-size:.75rem}
.btn-logout{font-size:.85rem;color:var(--muted)}

.container{max-width:1080px;margin:28px auto;padding:0 24px}
.footer{text-align:center;color:var(--muted);font-size:.8rem;padding:30px 0}

/* Flash */
.flash{padding:12px 16px;border-radius:10px;margin-bottom:16px;font-weight:500}
.flash-success{background:#e6f6ee;color:#147346;border:1px solid #b9e6cd}
.flash-error{background:#fdecea;color:#a1271f;border:1px solid #f3c3bf}
.flash-info{background:#eaf1fe;color:#27468f;border:1px solid #c4d6fb}

/* Page header */
.page-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}
.page-head .subtitle{color:var(--muted);margin-top:2px}

/* Cards / panels */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.panel-pad{padding:20px 22px}
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:820px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.mainnav{display:none}}

/* Stat cards */
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}
.stat .num{font-size:2rem;font-weight:800}
.stat .lbl{color:var(--muted);font-size:.85rem;text-transform:uppercase;letter-spacing:.03em}

/* Tables */
table.tbl{width:100%;border-collapse:collapse;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
table.tbl th,table.tbl td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
table.tbl th{background:#f8fafc;font-size:.78rem;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
table.tbl tr:last-child td{border-bottom:none}
table.tbl tr:hover td{background:#fafbfe}

/* Buttons */
.btn{display:inline-block;padding:9px 16px;border-radius:9px;border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:600;font-size:.9rem;cursor:pointer;line-height:1.2}
.btn:hover{text-decoration:none;border-color:#cbd4e3}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);border-color:var(--brand-dark)}
.btn-danger{background:#fff;border-color:#f0c4c0;color:var(--red)}
.btn-danger:hover{background:#fdecea}
.btn-sm{padding:5px 11px;font-size:.82rem}
.btn-block{width:100%;text-align:center}
.btn-row{display:flex;gap:8px;flex-wrap:wrap}

/* Forms */
form label{display:block;margin-bottom:14px;font-weight:600;font-size:.9rem}
form input[type=text],form input[type=email],form input[type=password],form input[type=date],form input[type=number],form select,form textarea{
  width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:.95rem;font-family:inherit;background:#fff;color:var(--ink);font-weight:400}
form textarea{min-height:220px;resize:vertical;line-height:1.55}
form input:focus,form select:focus,form textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px #d9e2fb}
.field-row{display:flex;gap:16px}
.field-row>label{flex:1}
.help{font-weight:400;color:var(--muted);font-size:.82rem}

/* Badges */
.badge{display:inline-block;padding:3px 9px;border-radius:999px;font-size:.74rem;font-weight:700;letter-spacing:.02em}
.badge-green{background:#e6f6ee;color:var(--green)}
.badge-amber{background:#fcf3df;color:var(--amber)}
.badge-red{background:#fdecea;color:var(--red)}
.badge-slate{background:#eef1f6;color:var(--slate)}
.badge-blue{background:#eaf1fe;color:var(--brand)}

/* Progress bar */
.progress{height:9px;background:#eef1f6;border-radius:999px;overflow:hidden;min-width:120px}
.progress > span{display:block;height:100%;background:var(--green);border-radius:999px}

/* SOP content */
.doc{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:28px 32px;box-shadow:var(--shadow)}
.doc h1,.doc h2,.doc h3{margin-top:1.2em}
.doc p{margin:0 0 1em}
.doc ul,.doc ol{margin:0 0 1em 1.4em}
.meta-list{list-style:none;padding:0;margin:0}
.meta-list li{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px solid var(--line);font-size:.9rem}
.meta-list li:last-child{border-bottom:none}
.meta-list .k{color:var(--muted)}

/* Layout split */
.split{display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:start}
@media(max-width:820px){.split{grid-template-columns:1fr}}

/* Toolbar (search/filter) */
.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px}
.toolbar input,.toolbar select{margin:0;width:auto;flex:0 0 auto}
.toolbar .search{flex:1;min-width:200px}

/* Quiz */
.question{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin-bottom:16px}
.question .opt{display:flex;align-items:center;gap:10px;padding:8px 10px;border:1px solid var(--line);border-radius:8px;margin-top:8px;font-weight:400;cursor:pointer}
.question .opt:hover{background:#fafbfe}
.question .opt input{width:auto;margin:0}
.opt.correct{background:#e6f6ee;border-color:#b9e6cd}
.opt.wrong{background:#fdecea;border-color:#f3c3bf}

/* Login */
.login-body{display:grid;place-items:center;min-height:100vh;background:linear-gradient(135deg,#27468f,#2f56d6)}
.login-card{background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.25);padding:38px 34px;width:360px;max-width:92vw}
.login-brand{font-weight:800;font-size:1.6rem;text-align:center}
.login-brand span{color:var(--brand)}
.login-sub{text-align:center;color:var(--muted);margin:6px 0 22px}

.empty{text-align:center;color:var(--muted);padding:50px 20px}
.empty h3{color:var(--ink)}
.section-title{margin:28px 0 14px;font-size:.85rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.inline-form{display:inline}
.muted{color:var(--muted)}
.nowrap{white-space:nowrap}
hr.sep{border:none;border-top:1px solid var(--line);margin:22px 0}