/* Bureau — estética Hoopytech/FlowTalk: near-black sobre slate claro */
:root {
  --primary: #111827;
  --primary-hover: #0b0f1a;
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --border-soft: #eef2f7;
  --text: #0f172a;
  --muted: #64748b;
  --ok-bg: #ecfdf5; --ok-fg: #065f46; --ok-bd: #a7f3d0;
  --err-bg: #fef2f2; --err-fg: #991b1b; --err-bd: #fecaca;
  --radius: .75rem;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--text); font-weight: 500; text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar { background: var(--card); border-bottom: 1px solid var(--border); }
.topbar-inner {
  max-width: 1080px; margin: 0 auto; padding: .65rem 1.25rem;
  display: flex; align-items: center; gap: 1.5rem;
}
.brand { display: flex; align-items: center; gap: .6rem; }
.brand:hover { text-decoration: none; }
.brand-sep { width: 1px; height: 20px; background: var(--border); }
.brand-app { font-weight: 700; letter-spacing: .02em; }
.topbar nav { display: flex; gap: 1.1rem; flex: 1; }
.topbar nav a { color: #334155; }
.topbar nav a:hover { color: var(--primary); text-decoration: none; }
.userbox { display: flex; align-items: center; gap: .8rem; color: var(--muted);
  font-size: .875rem; }

.container { max-width: 1080px; margin: 1.75rem auto; padding: 0 1.25rem; }

h1 { font-size: 1.45rem; margin: 0 0 1.1rem; }
h2 { font-size: 1.05rem; margin: 0 0 .8rem; }
.page-head { display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.1rem; }
.page-head h1 { margin: 0; }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.15rem 1.3rem; margin-bottom: 1.25rem;
  box-shadow: 0 1px 2px rgba(15, 23, 42, .04);
}

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem; margin-bottom: 1.5rem; }
.stat { background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem 1.2rem; }
.stat .num { font-size: 1.9rem; font-weight: 700; }
.stat .label { color: var(--muted); font-size: .85rem; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .55rem .6rem; border-bottom: 1px solid var(--border-soft);
  vertical-align: middle; }
th { color: var(--muted); font-size: .78rem; text-transform: uppercase;
  letter-spacing: .05em; font-weight: 600; }
tr:last-child td { border-bottom: none; }

.btn {
  display: inline-block; background: var(--primary); color: #fff; border: none;
  border-radius: .55rem; padding: .48rem .95rem; font-size: .875rem;
  font-weight: 600; cursor: pointer;
}
.btn:hover { background: var(--primary-hover); text-decoration: none; }
.btn-sm { padding: .28rem .65rem; font-size: .8rem; }
.btn-ghost { background: transparent; color: var(--text);
  border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg); }
.btn-danger { background: #dc2626; }
.btn-danger:hover { background: #b91c1c; }

form.inline { display: inline-flex; gap: .4rem; align-items: center; }

label { display: block; font-size: .82rem; font-weight: 600; color: #334155;
  margin-bottom: .25rem; }
input[type=text], input[type=email], input[type=password], textarea, select {
  width: 100%; padding: .5rem .7rem; border: 1px solid var(--border);
  border-radius: .55rem; font: inherit; background: #fff; color: var(--text);
}
input:focus, textarea:focus, select:focus {
  outline: 2px solid rgba(17, 24, 39, .25); border-color: var(--primary);
}
.field { margin-bottom: .9rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1rem; }
.checkbox { display: flex; gap: .5rem; align-items: center; }
.checkbox input { width: auto; }

.alert { border-radius: var(--radius); padding: .7rem 1rem; margin-bottom: 1.1rem;
  font-size: .9rem; }
.alert-ok { background: var(--ok-bg); color: var(--ok-fg);
  border: 1px solid var(--ok-bd); }
.alert-err { background: var(--err-bg); color: var(--err-fg);
  border: 1px solid var(--err-bd); }
.pw-once { margin-top: .4rem; }
.pw-once code { background: #fff; border: 1px dashed var(--ok-bd);
  padding: .15rem .5rem; border-radius: .4rem; font-size: .95rem; }

.badge { display: inline-block; border-radius: 999px; padding: .12rem .6rem;
  font-size: .75rem; font-weight: 600; }
.badge-on { background: var(--ok-bg); color: var(--ok-fg); }
.badge-off { background: #f1f5f9; color: var(--muted); }
.badge-err { background: var(--err-bg); color: var(--err-fg); }

/* filas de botones y tablas con scroll (responsive) */
.btn-row { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .8rem; }
.table-wrap { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.video-embed { position: relative; padding-top: 56.25%; margin: 1rem 0; }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%;
  border: 1px solid var(--border); border-radius: var(--radius); }

.muted { color: var(--muted); font-size: .85rem; }
.chips { display: flex; flex-wrap: wrap; gap: .35rem; }
.chip { background: #f1f5f9; border-radius: 999px; padding: .1rem .6rem;
  font-size: .78rem; }

/* login */
.login-wrap { min-height: 100vh; display: flex; align-items: center;
  justify-content: center; }
.login-card { width: 380px; background: var(--card);
  border: 1px solid var(--border); border-radius: 1rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, .08); padding: 2rem 2.2rem; }
.login-card .logo { text-align: center; margin-bottom: 1.4rem; }
.login-card h1 { font-size: 1.15rem; text-align: center; }
.login-sub { text-align: center; color: var(--muted); font-size: .85rem;
  margin-bottom: 1.4rem; }
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem; }

/* ---------- Responsive / móvil ---------- */
@media (max-width: 720px) {
  .topbar-inner { flex-wrap: wrap; gap: .6rem .9rem; padding: .6rem .9rem; }
  .topbar nav { order: 3; flex: 1 0 100%; flex-wrap: wrap; gap: .6rem 1rem;
    border-top: 1px solid var(--border-soft); padding-top: .5rem; }
  .userbox { margin-left: auto; }
  .container { margin: 1.1rem auto; padding: 0 .9rem; }
  .page-head { flex-direction: column; align-items: flex-start; gap: .6rem; }
  .form-grid { grid-template-columns: 1fr; }
  h1 { font-size: 1.25rem; }
  table { font-size: .9rem; }
  th, td { padding: .5rem .45rem; }
}
@media (max-width: 480px) {
  .userbox span { display: none; }        /* deja solo el botón Salir */
  .stats { grid-template-columns: 1fr 1fr; }
}