:root {
  --blue: #12498e;
  --dark: #0b2d5c;
  --gold: #c89b3c;
  --red: #b42a3a;
  --gray: #5f6b7a;
  --lgray: #9ba5b3;
  --fill: #f2f5f9;
  --border: #d8dee8;
  --ok: #1e8445;
  --bad: #b42a3a;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', Arial, sans-serif; background: #fff; color: #1a222e; line-height: 1.55; }
.container { max-width: 1060px; margin: 0 auto; padding: 0 20px; }

/* ── Nav ── */
.topnav { background: var(--dark); color: #fff; }
.nav-inner { max-width: 1060px; margin: 0 auto; padding: 12px 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.topnav a { color: #cfe0f5; text-decoration: none; font-size: 14px; margin-left: 14px; }
.topnav a:hover { color: #fff; }
.brand { color: #fff !important; font-size: 17px !important; margin-left: 0 !important; }
.nav-links { display: flex; align-items: center; flex-wrap: wrap; }
.nav-user { font-size: 13px; color: #9fd0ff; margin-left: 14px; }

/* ── Flash ── */
.flash-wrap { max-width: 1060px; margin: 14px auto 0; padding: 0 20px; }
.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 8px; font-size: 14px; }
.flash-success { background: #e6f4ea; color: #1e8445; border: 1px solid #b7dfc3; }
.flash-danger { background: #fdecea; color: #b42a3a; border: 1px solid #f5c6c0; }
.flash-warning { background: #fdf6e3; color: #8a6d1a; border: 1px solid #f0e0b0; }
.flash-info { background: #e8f0f8; color: #12498e; border: 1px solid #c4d6ec; }

/* ── Hero & head ── */
.hero { padding: 48px 0 28px; }
.hero h1 { font-size: 38px; color: var(--dark); line-height: 1.15; }
.hero .accent { color: var(--blue); }
.lead { font-size: 17px; color: var(--gray); margin: 14px 0 24px; max-width: 640px; }
.page-head { padding: 28px 0 14px; }
.page-head h1 { font-size: 28px; color: var(--dark); }
.muted { color: var(--gray); font-size: 14px; }
.small { font-size: 12px; }
.center { text-align: center; }

/* ── Buttons ── */
.btn { display: inline-block; padding: 9px 18px; border-radius: 5px; font-size: 14px; text-decoration: none; border: 1px solid transparent; cursor: pointer; background: var(--blue); color: #fff; }
.btn:hover { opacity: 0.9; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 13px 26px; font-size: 16px; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-outline { background: #fff; color: var(--blue); border-color: var(--blue); }
.btn-ghost { background: transparent; color: var(--blue); border-color: var(--blue); }
.btn-block { display: block; width: 100%; text-align: center; }

/* ── Cards ── */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; padding: 20px 0 40px; }
.card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 20px; }
.card h3 { font-size: 17px; color: var(--dark); margin-bottom: 8px; }
.card p { font-size: 13.5px; color: var(--gray); margin-bottom: 12px; }
.card-meta { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--gray); margin-bottom: 14px; }
.cards.stats .card { text-align: center; }
.cards.stats h3 { font-size: 34px; color: var(--blue); margin: 0; }

/* ── Progress ── */
.progress { height: 10px; background: #e8edf4; border-radius: 5px; overflow: hidden; margin: 8px 0 14px; }
.progress-fill { height: 100%; background: var(--blue); border-radius: 5px; }
.progress.small { height: 7px; }
.overall-bar { background: var(--fill); border: 1px solid var(--border); border-radius: 8px; padding: 16px 20px; margin: 16px 0; }
.overall-info { display: flex; justify-content: space-between; align-items: center; font-size: 14px; color: var(--gray); }
.overall-pct { font-size: 26px; font-weight: 700; color: var(--blue); }
.cert-badge { background: #fdf6e3; border: 1px solid #f0e0b0; color: #8a6d1a; border-radius: 6px; padding: 10px 14px; margin-top: 10px; font-size: 14px; }
.cert-badge a { color: var(--blue); }

/* ── Module / Lesson ── */
.module-status { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; background: var(--fill); border: 1px solid var(--border); border-radius: 8px; padding: 12px 16px; margin-bottom: 18px; font-size: 14px; }
.ok { color: var(--ok); font-weight: 600; }
.bad { color: var(--bad); font-weight: 600; }
.lesson-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }
.lesson-item { display: flex; align-items: center; gap: 14px; border: 1px solid var(--border); border-radius: 8px; padding: 14px 16px; background: #fff; }
.lesson-item.done { background: #f4faf6; border-color: #b7dfc3; }
.lesson-icon { font-size: 22px; }
.lesson-info { flex: 1; }
.lesson-info h3 { font-size: 15px; color: var(--dark); }
.lesson-body { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 26px 30px; margin-bottom: 20px; }
.lesson-body h2 { color: var(--blue); font-size: 19px; margin: 18px 0 8px; }
.lesson-body p { margin: 8px 0; font-size: 14.5px; color: #222c3a; }
.lesson-body li { margin: 5px 0 5px 22px; font-size: 14px; color: #333f4f; }
.lesson-nav { display: flex; justify-content: space-between; gap: 12px; margin: 20px 0 40px; }
.back-link { color: var(--blue); text-decoration: none; font-size: 13px; display: inline-block; margin-bottom: 6px; }

/* ── Quiz ── */
.quiz-gate { background: var(--fill); border: 1px solid var(--border); border-radius: 8px; padding: 20px; margin-bottom: 40px; }
.quiz-gate.ready { background: #e6f4ea; border-color: #b7dfc3; }
.quiz-gate h3 { color: var(--dark); margin-bottom: 6px; }
.quiz-q { border: 1px solid var(--border); border-radius: 8px; padding: 18px 20px; margin-bottom: 16px; background: #fff; }
.quiz-q h3 { font-size: 15px; color: var(--dark); margin-bottom: 10px; }
.quiz-opt { display: block; padding: 9px 12px; border: 1px solid var(--border); border-radius: 6px; margin: 6px 0; cursor: pointer; font-size: 14px; }
.quiz-opt:hover { background: #f0f5fb; }
.quiz-opt input { margin-right: 8px; }
.quiz-submit { margin: 20px 0 40px; text-align: center; }

/* ── Result ── */
.result-box { display: flex; align-items: center; gap: 22px; border-radius: 10px; padding: 26px 30px; margin: 10px 0 26px; }
.result-box.pass { background: #e6f4ea; border: 2px solid #b7dfc3; }
.result-box.fail { background: #fdecea; border: 2px solid #f5c6c0; }
.result-score { font-size: 56px; font-weight: 800; color: var(--dark); }
.result-score small { font-size: 22px; }
.result-text h2 { font-size: 24px; color: var(--dark); }
.result-text p { color: var(--gray); font-size: 14px; }
.section-title { font-size: 20px; color: var(--dark); margin: 22px 0 12px; border-bottom: 2px solid var(--border); padding-bottom: 6px; }
.review-item { border: 1px solid var(--border); border-radius: 8px; padding: 16px 18px; margin-bottom: 14px; }
.review-item.correct { border-left: 5px solid var(--ok); }
.review-item.wrong { border-left: 5px solid var(--bad); }
.review-item h3 { font-size: 14px; color: var(--dark); margin-bottom: 8px; }
.review-opt { padding: 5px 10px; border-radius: 4px; font-size: 13.5px; }
.review-opt.is-answer { background: #e6f4ea; color: var(--ok); font-weight: 600; }
.review-opt.is-wrong { background: #fdecea; color: var(--bad); text-decoration: line-through; }

/* ── Auth ── */
.auth-box { max-width: 420px; margin: 40px auto; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 30px; }
.auth-box h2 { color: var(--dark); margin-bottom: 6px; }
.auth-box form label { display: block; font-size: 13px; color: var(--gray); margin: 14px 0 4px; }
.auth-box input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 5px; font-size: 14px; }
.auth-box .btn { margin-top: 18px; }

/* ── Admin ── */
.admin-actions { margin: 10px 0 20px; }
.table-wrap { overflow-x: auto; margin-bottom: 30px; }
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th { background: var(--dark); color: #fff; text-align: left; padding: 10px 12px; font-size: 12px; }
.table td { padding: 9px 12px; border-bottom: 1px solid var(--border); }
.table tr:hover td { background: #f7fafd; }
.table .center { text-align: center; }
.table a { color: var(--blue); }

/* ── Certificate ── */
.cert-wrap { padding: 30px 0 50px; }
.certificate { max-width: 900px; margin: 0 auto; background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.cert-border { border: 3px double var(--blue); border-radius: 8px; padding: 40px 50px; text-align: center; }
.cert-top { font-size: 44px; }
.certificate h1 { color: var(--blue); font-size: 30px; letter-spacing: 2px; margin: 8px 0 2px; }
.certificate h2 { color: var(--dark); font-size: 18px; font-weight: 400; margin-bottom: 24px; }
.cert-given { color: var(--gray); font-size: 14px; }
.cert-name { font-size: 34px; font-weight: 800; color: var(--dark); margin: 8px 0; }
.cert-body { color: var(--gray); font-size: 13px; }
.cert-modules { color: var(--dark); font-size: 14px; font-weight: 600; margin: 10px 0; }
.cert-score { color: var(--gray); font-size: 14px; }
.cert-foot { display: flex; justify-content: space-between; margin-top: 34px; color: var(--gray); font-size: 12px; }
.cert-actions { text-align: center; margin-top: 22px; }

/* ── Footer ── */
.site-footer { background: var(--fill); border-top: 1px solid var(--border); padding: 18px 0; margin-top: 40px; }
.site-footer p { font-size: 12.5px; color: var(--gray); text-align: center; }

@media (max-width: 640px) {
  .hero h1 { font-size: 28px; }
  .lesson-body { padding: 18px; }
  .cert-border { padding: 24px; }
}