:root{
  --bg:#eef2f5;
  --surface:#ffffff;
  --surface-2:#f8fafc;
  --text:#172033;
  --muted:#667085;
  --line:#d9e1ea;
  --nav:#172033;
  --nav-soft:#233044;
  --primary:#0f766e;
  --primary-dark:#115e59;
  --accent:#334155;
  --ok:#15803d;
  --mid:#b7791f;
  --bad:#b91c1c;
  --info:#1d4ed8;
  --shadow:0 18px 45px rgba(15,23,42,.08);
}

*{box-sizing:border-box}
html{min-height:100%}
body{margin:0;min-height:100%;font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}
a{color:inherit}

.login-page{min-height:100vh;display:grid;place-items:center;padding:28px;background:linear-gradient(135deg,#172033 0%,#203044 58%,#0f766e 100%)}
.auth-shell{width:min(980px,100%);display:grid;grid-template-columns:1.05fr 420px;gap:0;background:rgba(255,255,255,.96);border:1px solid rgba(255,255,255,.5);border-radius:8px;box-shadow:0 28px 90px rgba(0,0,0,.32);overflow:hidden}
.auth-identity{min-height:460px;padding:40px;background:#172033;color:#fff;display:flex;align-items:flex-end;gap:18px}
.auth-identity h1{margin:6px 0 0;color:#fff}
.auth-card{padding:40px;background:#fff;display:flex;flex-direction:column;justify-content:center}
.auth-form label{background:var(--surface-2)}

.app-body{background:var(--bg)}
.app-shell{min-height:100vh;display:grid;grid-template-columns:268px minmax(0,1fr)}
.sidebar{background:var(--nav);color:#fff;padding:22px 18px;display:flex;flex-direction:column;gap:24px;position:sticky;top:0;height:100vh}
.brand-block{display:flex;align-items:center;gap:12px;text-decoration:none;padding:8px}
.brand-mark{width:42px;height:42px;border-radius:8px;background:#d8f3ee;color:#0f766e;display:inline-flex;align-items:center;justify-content:center;font-weight:900;letter-spacing:0}
.brand-mark.large{width:64px;height:64px;font-size:22px}
.brand-copy{display:grid;gap:2px}
.brand-copy strong{font-size:15px}
.brand-copy small{color:#b7c4d7}
.side-nav{display:grid;gap:6px}
.nav-link{display:flex;align-items:center;min-height:42px;border-radius:8px;padding:11px 12px;color:#cbd5e1;text-decoration:none;font-weight:800}
.nav-link:hover{background:var(--nav-soft);color:#fff}
.nav-link.active{background:#d8f3ee;color:#115e59}
.session-panel{margin-top:auto;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:14px;display:grid;gap:10px}
.session-panel strong{overflow-wrap:anywhere}

.workspace{min-width:0}
.page-header{background:rgba(255,255,255,.92);border-bottom:1px solid var(--line);padding:24px clamp(24px,4vw,44px);display:flex;align-items:center;justify-content:space-between;gap:20px;position:sticky;top:0;z-index:3;backdrop-filter:blur(10px)}
.page-header h1{margin:4px 0 0;font-size:30px;line-height:1.12;letter-spacing:0;color:var(--text)}
.page-subtitle{margin:8px 0 0;color:var(--muted);font-weight:700}
.eyebrow{margin:0;color:#0f766e;text-transform:uppercase;font-size:12px;font-weight:900;letter-spacing:.08em}
.top-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:flex-end}
.container{padding:26px clamp(24px,4vw,44px) 44px;display:grid;gap:20px}
.messages{display:grid;gap:10px}

.card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:20px;box-shadow:var(--shadow)}
.table-card{padding:0;overflow:hidden}
.table-card .section-heading{padding:20px 20px 0}
.form-card{max-width:860px}
.section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:16px}
.section-heading h2{margin:0;font-size:20px;line-height:1.2}
.section-heading p{margin:6px 0 0;color:var(--muted)}

input,select{width:100%;border:1px solid var(--line);border-radius:8px;padding:12px 13px;background:#fff;color:var(--text);font:inherit;min-height:44px}
input:focus,select:focus{outline:3px solid rgba(15,118,110,.16);border-color:var(--primary)}
button,.button{border:0;border-radius:8px;min-height:42px;padding:11px 15px;background:var(--primary);color:white;font-weight:900;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;line-height:1.1;white-space:nowrap}
button:hover,.button:hover{background:var(--primary-dark)}
.button.secondary{background:#e7edf3;color:#172033}
.button.secondary:hover{background:#d7e1eb}
.button.danger{background:var(--bad)}
.button.danger:hover{background:#991b1b}
.button.compact{min-height:34px;padding:8px 11px;font-size:13px}
.inline-form{display:inline-flex;margin:0}

.alert{padding:13px 15px;border-radius:8px;border:1px solid transparent;font-weight:700}
.alert.error{background:#fee2e2;color:#991b1b;border-color:#fecaca}
.alert.success{background:#dcfce7;color:#166534;border-color:#bbf7d0}

.upload-form{display:grid;gap:16px}
.upload-form label,.user-form label,.edit-user-form label,.filters label{display:grid;gap:7px;color:#344054;font-size:13px;font-weight:900}
.upload-form label{background:var(--surface-2);border:1px solid var(--line);padding:16px;border-radius:8px}
.upload-form span{font-weight:900}
.upload-form small,.muted-line{color:var(--muted)}
.muted-line{display:block;margin-top:4px;font-size:12px;font-weight:700}
.upload-form-panel{max-width:720px}
.user-form{display:grid;grid-template-columns:1fr 1fr 190px auto;gap:14px;align-items:end}
.edit-user-form{display:grid;grid-template-columns:1fr 220px;gap:16px;max-width:720px}
.edit-user-form label:nth-of-type(3){grid-column:1 / -1}
.form-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center;grid-column:1 / -1}

.filters form{display:grid;grid-template-columns:repeat(5,minmax(140px,1fr));gap:14px;align-items:end}
.kpi-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}
.kpi{position:relative;overflow:hidden}
.kpi:before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--accent)}
.kpi.success:before{background:var(--ok)}
.kpi.warning:before{background:var(--mid)}
.kpi.danger:before{background:var(--bad)}
.kpi.accent:before{background:var(--info)}
.kpi span{display:block;color:var(--muted);font-weight:900;font-size:13px}
.kpi strong{font-size:32px;display:block;margin-top:8px;line-height:1}
.kpi small{display:block;color:var(--muted);margin-top:6px;font-weight:700}

.grid-two{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.75fr);gap:20px}
.bars{display:grid;gap:15px}
.bar-row{display:grid;grid-template-columns:220px 1fr 64px;gap:14px;align-items:center}
.bar-label{display:grid;gap:4px;min-width:0}
.bar-label strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bar-label span{color:var(--muted);font-size:13px;font-weight:700}
.bar-track,.mini-track{height:12px;background:#e5eaf0;border-radius:999px;overflow:hidden}
.bar-fill,.mini-track div{height:100%;background:linear-gradient(90deg,#0f766e,#1d4ed8);border-radius:999px}
.bar-value{font-weight:900;text-align:right}
.donut{width:210px;height:210px;margin:10px auto 20px;border-radius:50%;background:conic-gradient(var(--ok) 0 calc(var(--a)*1%),var(--mid) calc(var(--a)*1%) calc((var(--a) + var(--b))*1%),var(--bad) 0);position:relative}
.donut:after{content:"";position:absolute;inset:38px;background:#fff;border-radius:50%}
.legend{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.legend span{display:flex;align-items:center;gap:7px;color:var(--muted);font-weight:800}
.legend i{width:12px;height:12px;border-radius:50%;display:inline-block}
.legend .ok{background:var(--ok)}
.legend .mid{background:var(--mid)}
.legend .bad{background:var(--bad)}

.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;min-width:980px}
th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;font-size:14px;vertical-align:middle}
th{background:#f8fafc;color:#475569;font-size:12px;text-transform:uppercase;letter-spacing:.05em;white-space:nowrap}
tbody tr:hover{background:#fbfdff}
.badge,.role-pill{display:inline-flex;align-items:center;border-radius:999px;font-weight:900;font-size:12px;line-height:1;padding:7px 10px}
.badge.aprobado{background:#dcfce7;color:#166534}
.badge.en-progreso{background:#fef3c7;color:#92400e}
.badge.no-iniciado{background:#fee2e2;color:#991b1b}
.role-pill{background:#edf2f7;color:#334155}
.session-panel .role-pill{width:max-content;background:#d8f3ee;color:#115e59}
.mini-track{width:110px;display:inline-block;vertical-align:middle;margin-right:8px}
.empty{text-align:center;color:var(--muted);padding:30px!important;font-weight:800}
.row-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.row-actions form{margin:0}
.config-card{margin:4px 0}
.config-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.config-grid div{background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:14px}
.config-grid span{display:block;color:#64748b;font-size:12px;font-weight:900;margin-bottom:6px}
.config-grid strong{font-size:17px}
.exam-config{margin-top:16px}
.exam-config summary{cursor:pointer;font-weight:900;color:#172033}
.small-table table{font-size:13px}

@media(max-width:1180px){
  .kpi-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .filters form{grid-template-columns:repeat(2,minmax(0,1fr))}
  .user-form{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-two{grid-template-columns:1fr}
  .bar-row{grid-template-columns:1fr}
}

@media(max-width:860px){
  .auth-shell{grid-template-columns:1fr}
  .auth-identity{min-height:210px;align-items:center}
  .app-shell{grid-template-columns:1fr}
  .sidebar{position:static;height:auto;display:grid;grid-template-columns:1fr;gap:16px}
  .side-nav{grid-template-columns:repeat(3,minmax(0,1fr))}
  .session-panel{margin-top:0}
  .page-header{position:static;display:grid;padding:22px}
  .top-actions{justify-content:flex-start}
  .container{padding:22px}
}

@media(max-width:640px){
  .login-page{padding:16px}
  .auth-card,.auth-identity{padding:24px}
  .page-header h1{font-size:24px}
  .side-nav{grid-template-columns:1fr}
  .kpi-grid{grid-template-columns:1fr}
  .filters form,.user-form,.edit-user-form{grid-template-columns:1fr}
  .top-actions .button,.inline-form,.session-panel button,.form-actions .button,.form-actions button{width:100%}
  button,.button{white-space:normal}
}