:root {
  --navy: #14263F;
  --navy-lt: #243B5C;
  --amber: #F29900;
  --amber-dk: #B87400;
  --ink: #222A35;
  --grey: #5C6672;
  --light: #F2F4F7;
  --light2: #E7EBF0;
  --line: #D5DBE2;
  --white: #FFFFFF;
  --ok: #1E874B;
  --warn: #B87400;
  --err: #C0392B;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Calibri", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--light);
  line-height: 1.5;
}

a { color: var(--amber-dk); }

/* ---- Header ---- */
.site-header {
  background: var(--navy);
  color: #fff;
  padding: 0 22px;
  position: sticky;
  top: 0;
  z-index: 40;
  box-shadow: 0 1px 8px rgba(0,0,0,.15);
}
.site-header .inner {
  max-width: 1060px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 18px;
  height: 60px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: .01em;
}
.brand .dot { width: 14px; height: 26px; background: var(--amber); border-radius: 3px; display: inline-block; }
.brand small { display: block; font-weight: 400; font-size: 11px; color: #C7D1DE; letter-spacing: .06em; text-transform: uppercase; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.nav a, .nav button {
  color: #DDE4EC;
  text-decoration: none;
  font-size: 15px;
  padding: 7px 12px;
  border-radius: 6px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}
.nav a:hover, .nav button:hover { background: var(--navy-lt); color: #fff; }
.nav .btn-amber { background: var(--amber); color: var(--navy); font-weight: 700; }
.nav .btn-amber:hover { background: #ffab1a; color: var(--navy); }

/* ---- Layout ---- */
.wrap { max-width: 1060px; margin: 0 auto; padding: 28px 22px 64px; }
.narrow { max-width: 720px; }

h1 { color: var(--navy); font-size: 30px; margin: 0 0 6px; line-height: 1.15; }
h2 { color: var(--navy); font-size: 22px; margin: 26px 0 10px; }
h3 { color: var(--navy); font-size: 18px; margin: 20px 0 8px; }
.kicker { color: var(--amber-dk); font-weight: 800; text-transform: uppercase; letter-spacing: .08em; font-size: 13px; margin: 0 0 6px; }
.lede { color: var(--grey); font-size: 17px; margin: 0 0 18px; }

/* ---- Hero ---- */
.hero {
  background: var(--navy);
  color: #fff;
  border-radius: 12px;
  padding: 40px 36px;
  margin-bottom: 26px;
  border-left: 10px solid var(--amber);
}
.hero h1 { color: #fff; font-size: 38px; }
.hero p { color: #C7D1DE; font-size: 18px; max-width: 640px; }

/* ---- Cards ---- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
  display: flex;
  flex-direction: column;
}
.card.locked { opacity: .62; }
.card .badge {
  align-self: flex-start;
  font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .05em;
  color: var(--navy); background: var(--light2);
  padding: 3px 9px; border-radius: 20px; margin-bottom: 10px;
}
.card .badge.req { background: var(--amber); }
.card h3 { margin: 0 0 4px; }
.card .muted { color: var(--grey); font-size: 14.5px; flex: 1; }

/* ---- Progress ---- */
.progress { background: var(--light2); border-radius: 20px; height: 10px; overflow: hidden; margin: 14px 0 8px; }
.progress > span { display: block; height: 100%; background: var(--amber); border-radius: 20px; }
.progress.done > span { background: var(--ok); }
.pct { font-size: 13px; color: var(--grey); }

/* ---- Buttons ---- */
.btn {
  display: inline-block; cursor: pointer; font-family: inherit; font-size: 15px; font-weight: 700;
  padding: 10px 18px; border-radius: 7px; border: 1px solid transparent; text-decoration: none; text-align: center;
}
.btn-primary { background: var(--amber); color: var(--navy); }
.btn-primary:hover { background: #ffab1a; }
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: var(--navy-lt); }
.btn-ghost { background: #fff; color: var(--navy); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--navy); }
.btn[disabled], .btn.disabled { opacity: .5; pointer-events: none; }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-top: 16px; }

/* ---- Checklist ---- */
.checklist { list-style: none; padding: 0; margin: 16px 0; }
.checklist li {
  display: flex; align-items: center; gap: 12px;
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 12px 16px; margin-bottom: 8px;
}
.checklist li .tick {
  width: 26px; height: 26px; border-radius: 50%; flex: none;
  display: grid; place-items: center; font-weight: 800; font-size: 15px;
  background: var(--light2); color: var(--grey);
}
.checklist li.done .tick { background: var(--ok); color: #fff; }
.checklist li .lname { flex: 1; font-weight: 600; color: var(--navy); text-decoration: none; }
.checklist li .lname:hover { text-decoration: underline; }
.checklist li .mins { color: var(--grey); font-size: 13px; }

/* ---- Requirements row ---- */
.reqs { display: flex; gap: 10px; flex-wrap: wrap; margin: 14px 0; }
.req { font-size: 14px; padding: 6px 12px; border-radius: 20px; background: var(--light2); color: var(--grey); }
.req.met { background: #E4F3EA; color: var(--ok); font-weight: 700; }

/* ---- Lesson body ---- */
.lesson-body { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 26px 30px; }
.lesson-body p, .lesson-body li { font-size: 16.5px; }
.lesson-body h2 { margin-top: 22px; }
.lesson-body blockquote {
  border-left: 5px solid var(--amber); background: var(--light); margin: 16px 0; padding: 12px 18px; border-radius: 0 8px 8px 0; color: var(--ink);
}
.lesson-body code { background: var(--light2); padding: 1px 6px; border-radius: 4px; font-size: 14.5px; }
.callout {
  background: #FDF0DA; border-left: 5px solid var(--amber); border-radius: 0 8px 8px 0;
  padding: 14px 18px; margin: 18px 0;
}
.callout .clabel { font-weight: 800; color: var(--amber-dk); text-transform: uppercase; letter-spacing: .05em; font-size: 12.5px; display: block; margin-bottom: 4px; }
.callout.grade { background: #EAF2FB; border-left-color: var(--navy); }
.callout.grade .clabel { color: var(--navy); }
.callout.grade .grade-score { font-size: 1.15rem; margin: 2px 0 8px; }
.callout.grade p { margin: 0 0 6px; }

/* ---- Forms ---- */
.form-card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 26px 28px; }
label { display: block; font-weight: 700; color: var(--navy); margin: 14px 0 5px; font-size: 15px; }
input[type=text], input[type=email], input[type=password], textarea {
  width: 100%; padding: 11px 13px; border: 1px solid var(--line); border-radius: 7px; font-family: inherit; font-size: 15px; background: #fff;
}
input:focus, textarea:focus { outline: none; border-color: var(--amber); }
textarea { min-height: 130px; resize: vertical; }
.hint { color: var(--grey); font-size: 13.5px; margin-top: 4px; }

/* ---- Quiz ---- */
.question { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 18px 22px; margin-bottom: 14px; }
.question .qnum { color: var(--amber-dk); font-weight: 800; font-size: 13px; }
.question p.qtext { font-weight: 700; color: var(--navy); font-size: 17px; margin: 4px 0 12px; }
.option { display: flex; gap: 10px; align-items: flex-start; padding: 9px 12px; border: 1px solid var(--line); border-radius: 7px; margin-bottom: 7px; cursor: pointer; }
.option:hover { border-color: var(--amber); }
.option input { margin-top: 3px; }
.option.correct { background: #E4F3EA; border-color: var(--ok); }
.option.wrong { background: #FBE7E4; border-color: var(--err); }
.explain { font-size: 14px; color: var(--grey); margin-top: 6px; }

/* ---- Flash / alerts ---- */
.flash { border-radius: 8px; padding: 12px 16px; margin-bottom: 18px; font-weight: 600; }
.flash.success { background: #E4F3EA; color: var(--ok); }
.flash.warn { background: #FDF0DA; color: var(--warn); }
.flash.error { background: #FBE7E4; color: var(--err); }

/* ---- Result banner ---- */
.result-banner { border-radius: 10px; padding: 20px 24px; margin-bottom: 20px; color: #fff; }
.result-banner.pass { background: var(--ok); }
.result-banner.fail { background: var(--err); }
.result-banner h2 { color: #fff; margin: 0 0 4px; }

/* ---- Table ---- */
table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 10px; overflow: hidden; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); font-size: 14.5px; }
th { background: var(--navy); color: #fff; font-size: 13px; text-transform: uppercase; letter-spacing: .04em; }
td .yes { color: var(--ok); font-weight: 800; }
td .no { color: var(--line); }

/* ---- Footer ---- */
.site-footer { color: var(--grey); font-size: 13px; text-align: center; padding: 26px; }

.pill-done { color: var(--ok); font-weight: 800; }
.tag-lock { font-size: 13px; color: var(--grey); }

/* ---- Certificate ---- */
.cert-page { background: #33465e; min-height: 100vh; display: grid; place-items: center; padding: 30px; }
.cert {
  width: 900px; max-width: 100%; background: #fff; padding: 56px 64px; border: 3px solid var(--navy);
  box-shadow: 0 12px 40px rgba(0,0,0,.3); position: relative;
}
.cert::before { content: ""; position: absolute; inset: 14px; border: 1.5px solid var(--amber); pointer-events: none; }
.cert .c-kicker { color: var(--amber-dk); font-weight: 800; letter-spacing: .18em; text-transform: uppercase; font-size: 14px; }
.cert h1 { font-size: 40px; margin: 6px 0 20px; }
.cert .c-name { font-size: 42px; color: var(--navy); font-weight: 800; margin: 18px 0 6px; border-bottom: 2px solid var(--amber); display: inline-block; padding-bottom: 6px; }
.cert .c-sub { font-size: 18px; color: var(--grey); margin: 14px 0 26px; }
.cert .c-meta { display: flex; justify-content: space-between; margin-top: 40px; color: var(--grey); font-size: 14px; }
.cert .c-meta b { color: var(--navy); display: block; font-size: 16px; }
.cert-actions { text-align: center; margin-top: 20px; }
@media print {
  .cert-actions, .site-header, .site-footer { display: none !important; }
  .cert-page { background: #fff; padding: 0; }
  .cert { box-shadow: none; }
}