:root {
  --green: #a4c639;
  --green-deep: #8aab2a;
  --purple: #7a3eb1;
  --purple-deep: #5d2a8a;
  --ink: #1e231d;
  --ink-2: #2a312a;
  --paper: #f3f4ea;
  --muted: #8a9483;
  --line: #d8dccb;
  --danger: #d6332f;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  min-height: 100%;
}

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--ink);
  color: #fff;
  padding: 14px 22px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-logo { height: 30px; width: auto; display: block; }
.brand-divider { width: 1px; height: 22px; background: rgba(255, 255, 255, 0.28); display: block; }
.brand-mark {
  font-weight: 800;
  letter-spacing: 2px;
  font-size: 20px;
  color: var(--green);
}
.brand-sub {
  font-size: 13px;
  color: #cdd3c2;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 600;
}
.topnav { display: flex; align-items: center; gap: 12px; }
.topnav-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #fff;
  padding: 7px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
}
.topnav-btn:hover { background: rgba(255, 255, 255, 0.1); }

/* ---------- Account menu ---------- */
.account { position: relative; }
.account-btn {
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
}
.avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--green);
  color: var(--ink);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid rgba(255, 255, 255, 0.25);
  transition: border-color 0.12s ease;
}
.account-btn:hover .avatar { border-color: var(--green); }
.account-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 230px;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 8px;
  z-index: 50;
}
.account-id { padding: 8px 10px 10px; border-bottom: 1px solid var(--line); margin-bottom: 6px; }
.account-name { font-weight: 700; font-size: 14px; }
.account-email { font-size: 12px; color: var(--muted); word-break: break-all; }
.account-role {
  display: inline-block;
  margin-top: 6px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--green-deep);
  background: #eef3df;
  padding: 2px 8px;
  border-radius: 999px;
}
.account-item {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 9px 10px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--ink);
  cursor: pointer;
}
.account-item:hover { background: var(--paper); }
.account-item.danger { color: var(--danger); }
.account-divider { height: 1px; background: var(--line); margin: 6px 0; }

/* Language picker (inside the account menu) */
.account-lang { padding: 4px 10px 8px; }
.account-lang-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
  margin-bottom: 6px;
}
.account-lang-opts { display: flex; gap: 6px; }
.lang-opt {
  flex: 1;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}
.lang-opt:hover { border-color: var(--green); }
.lang-opt.active {
  background: var(--green-deep);
  border-color: var(--green-deep);
  color: #fff;
}

/* ---------- Breadcrumb ---------- */
.crumbs {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 20px 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
}
.crumb-link {
  background: transparent;
  border: none;
  color: var(--green-deep);
  cursor: pointer;
  font-size: 13px;
  padding: 2px 4px;
  border-radius: 6px;
  font-weight: 600;
}
.crumb-link:hover { background: #eef3df; text-decoration: underline; }
.crumb-here { color: var(--muted); padding: 2px 4px; }
.crumb-sep { color: var(--line); }

/* ---------- Login ---------- */
/* Branded full-bleed backdrop while signed out. */
body.auth-mode { background: var(--ink); }
body.auth-mode .topbar { border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
body.auth-mode .footer { display: none; }
body.auth-mode main#app { padding-top: 0; padding-bottom: 0; }
.login-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 64px);
  padding: 36px 16px;
  background:
    radial-gradient(900px 500px at 50% -10%, rgba(164, 198, 57, 0.22), transparent 60%),
    linear-gradient(160deg, #20271f 0%, #161a15 100%);
  border-radius: 0;
}
.login-card {
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  width: 100%;
  max-width: 410px;
  overflow: hidden;
}
.login-head {
  background: linear-gradient(135deg, var(--green-deep) 0%, var(--green) 100%);
  padding: 26px 32px 22px;
  text-align: center;
}
.login-logo { height: 34px; display: block; margin: 0 auto; }
.login-head-sub {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 4px;
  color: rgba(30, 35, 29, 0.72);
}
.login-body { padding: 28px 32px 26px; }
.login-title { margin: 0 0 6px; font-size: 23px; text-align: center; }
.login-sub { margin: 0 0 20px; color: var(--muted); font-size: 14px; text-align: center; line-height: 1.45; }
.login-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  margin: 14px 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}
.loginfield {
  display: block;
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  background: #fbfcf7;
  transition: border-color 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}
.loginfield:focus {
  outline: none;
  background: #fff;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(164, 198, 57, 0.25);
}
.login-error {
  background: #fdecec;
  color: var(--danger);
  border: 1px solid #f6c9c8;
  padding: 10px 13px;
  border-radius: 10px;
  font-size: 13px;
  margin-bottom: 4px;
}
.login-foot {
  margin: 20px 0 0;
  text-align: center;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.3px;
}

/* ---------- Admin ---------- */
.admin-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 18px;
}
.admin-card .cat-head { margin-top: 0; }
.admin-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.admin-input {
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  flex: 1 1 150px;
  min-width: 120px;
}
.admin-input:focus { outline: none; border-color: var(--green); }
select.admin-input { flex: 0 0 110px; }
.admin-file { font-size: 14px; }
.admin-msg { display: block; margin-top: 10px; font-size: 13px; color: var(--muted); }
.admin-msg.ok { color: var(--green-deep); }
.admin-msg.err { color: var(--danger); }
.admin-errs { margin: 8px 0 0; padding-left: 18px; color: var(--danger); font-size: 12px; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.admin-table th {
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
  padding: 6px 10px;
  border-bottom: 2px solid var(--line);
}
.admin-table td { padding: 9px 10px; border-bottom: 1px solid var(--line); }
.role-pill {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 999px;
  text-transform: capitalize;
}
.role-pill.admin { background: var(--green); color: var(--ink); }
.role-pill.user { background: #eef0e4; color: var(--muted); }
.btn.small { padding: 5px 12px; font-size: 12px; }

main#app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 20px 60px;
  min-height: 60vh;
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 18px;
  border-top: 1px solid var(--line);
}

/* ---------- Catalog ---------- */
.catalog-head { margin-bottom: 22px; }
.catalog-head h1 { margin: 0 0 6px; font-size: 26px; }
.catalog-head p { margin: 0; color: var(--muted); }

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}
.lesson-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.lesson-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.lesson-card .cat {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--green-deep);
  font-weight: 700;
}
.lesson-card h3 { margin: 0; font-size: 18px; }
.lesson-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.4; }
.lesson-card .meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
}
.badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
}
.badge.done { background: var(--green); color: var(--ink); }
.badge.todo { background: #eef0e4; color: var(--muted); }

#brand-home { cursor: pointer; }

/* ---------- Product picker (home) ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.product-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 22px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 4px solid var(--green);
}
.product-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.product-card.soon {
  cursor: default;
  opacity: 0.7;
  border-top-color: #cdd2c2;
}
.product-card.soon:hover { transform: none; box-shadow: none; }
.product-name { font-size: 22px; font-weight: 800; color: var(--ink); }
.product-tag { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.4; flex: 1; }
.product-card .badge { align-self: flex-start; margin-top: 6px; }

/* ---------- Catalog categories (Mission Critical / 3GPP MCX) ---------- */
.catalog-section { margin-bottom: 30px; }
.category-title {
  font-size: 15px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--green-deep);
  margin: 0 0 12px;
  padding-bottom: 6px;
  border-bottom: 2px solid #e6ead8;
}
.category-title.accent-purple {
  color: var(--purple-deep);
  border-bottom-color: #ecdff5;
}
/* Purple accent for 3GPP MCX products (T.Star, T.Galaxy) */
.product-card.accent-purple { border-top-color: var(--purple); }
.product-card.accent-purple .badge.done { background: var(--purple); color: #fff; }
.product-card.accent-purple.soon { border-top-color: #cdbfe0; }

/* breadcrumb + category headings on the product page */
.catalog-head .crumb {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--green-deep);
  margin-bottom: 6px;
}
.cat-head {
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
  margin: 26px 0 14px;
}
.cat-head:first-child { margin-top: 4px; }
.track-blurb { margin: -8px 0 14px; color: var(--muted); font-size: 14px; line-height: 1.4; }

/* ---------- Track certificate card ---------- */
.cert-track {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-top: 16px;
}
.cert-track.unlocked {
  border-color: var(--green);
  background: #fbfdf2;
  box-shadow: inset 0 0 0 1px var(--green);
}
.cert-track.locked { opacity: 0.95; }
.cert-track-info { flex: 1; min-width: 240px; }
.cert-track-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}
.cert-ico { font-size: 20px; line-height: 1; }
.cert-track-sub { margin: 6px 0 10px; color: var(--muted); font-size: 13px; }
.cert-track .btn { white-space: nowrap; }

/* ---------- Lesson layout ---------- */
.lesson-wrap {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 36px;
  align-items: start;
}
/* Lesson views are sized to fit the viewport; trim the large catalogue bottom
   padding and hide the site footer so the phone/desktop frame fits without
   scrolling (the footer is not needed on a focused lesson screen). */
main#app:has(.lesson-wrap) { padding-bottom: 16px; }
body:has(.lesson-wrap) .footer { display: none; }
@media (max-width: 760px) {
  .lesson-wrap { grid-template-columns: 1fr; justify-items: center; }
}

/* ---------- Desktop "PC" frame (landscape lessons, e.g. T.Rodon) ---------- */
/* Desktop lessons break out wider than the normal 1100px column so the console
   is shown close to its real size, with the instructions in a side column and
   the image height capped so the whole lesson fits without scrolling. */
main#app:has(.lesson-wrap.desktop-mode) { max-width: 1660px; }

.lesson-wrap.desktop-mode {
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  align-items: start;
  justify-items: stretch;
}
.lesson-wrap.desktop-mode .panel {
  max-width: none;
  width: 100%;
  margin: 0;
  position: sticky;
  top: 14px;
}
.desktop {
  width: max-content;
  max-width: 100%;
  margin: 0 auto;
  background: #0c0d0c;
  border-radius: 12px;
  box-shadow: var(--shadow), inset 0 0 0 1px #2c2f29;
  overflow: hidden;
  border: 1px solid #15301f33;
}
.win-titlebar {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 34px;
  padding: 0 14px;
  background: linear-gradient(#23261f, #1a1c16);
  border-bottom: 1px solid #2c2f29;
}
.win-dots { display: flex; gap: 7px; }
.win-dots .wd { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.win-dots .wd.r { background: #ff5f57; }
.win-dots .wd.y { background: #febc2e; }
.win-dots .wd.g { background: #28c840; }
.win-title { color: #c9cfc0; font-size: 13px; font-weight: 600; letter-spacing: .3px; }
.desktop .screen {
  border-radius: 0;
  width: auto;
  max-width: 100%;
  height: auto;
  cursor: pointer;
}
.desktop .screen img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: calc(100vh - 210px);
  object-fit: contain;
}

/* Narrow viewports: stack instructions under the frame, normal width */
@media (max-width: 1180px) {
  main#app:has(.lesson-wrap.desktop-mode) { max-width: 1100px; }
  .lesson-wrap.desktop-mode { grid-template-columns: 1fr; }
  .lesson-wrap.desktop-mode .panel {
    position: static;
    max-width: 760px;
    margin: 0 auto;
  }
  .desktop .screen img { max-height: none; }
}

/* ---------- Phone bezel ---------- */
.phone {
  position: relative;
  /* Height-driven so the whole phone fits the viewport without scrolling (like the
     desktop frame). Width follows the aspect-ratio. Caps at the original 713px on
     tall screens, shrinks on short ones. justify-self stops the grid stretching it. */
  justify-self: center;
  width: auto;
  height: min(713px, calc(100vh - 200px));
  max-width: 100%;
  aspect-ratio: 1080 / 2408;
  background: #0c0d0c;
  border-radius: 30px;
  padding: 12px 10px;
  box-shadow: var(--shadow), inset 0 0 0 2px #2c2f29;
  /* rugged accents */
  border: 3px solid #15301f1a;
}
.phone::before { /* speaker */
  content: "";
  position: absolute;
  top: 6px; left: 50%;
  transform: translateX(-50%);
  width: 46px; height: 5px;
  background: #2c2f29;
  border-radius: 3px;
}
.phone .side-btn {
  position: absolute;
  right: -6px;
  width: 4px; height: 54px;
  background: #1b3b22;
  border-radius: 3px;
}
.phone .side-btn.s1 { top: 150px; }
.phone .side-btn.s2 { top: 220px; }
.phone .side-btn.left {
  left: -6px; right: auto;
  height: 70px; top: 170px;
  background: var(--green-deep);
}
.screen {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 20px;
  overflow: hidden;
  background: #000;
  cursor: pointer;
}
.screen img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  user-select: none;
  -webkit-user-drag: none;
}

/* hotspot */
.hotspot {
  position: absolute;
  border-radius: 10px;
  box-shadow: 0 0 0 3px rgba(164, 198, 57, 0.9), 0 0 18px 4px rgba(164, 198, 57, 0.55);
  background: rgba(164, 198, 57, 0.14);
  animation: pulse 1.6s ease-in-out infinite;
  pointer-events: none;
}
@keyframes pulse {
  0%, 100% { opacity: 0.45; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.03); }
}
.screen.shake { animation: shake 0.4s; }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-7px); }
  40%, 80% { transform: translateX(7px); }
}
/* wrong-tap ripple */
.miss-ping {
  position: absolute;
  width: 26px; height: 26px;
  margin: -13px 0 0 -13px;
  border-radius: 50%;
  border: 2px solid var(--danger);
  animation: ping 0.5s ease-out forwards;
  pointer-events: none;
}
@keyframes ping {
  from { opacity: 0.9; transform: scale(0.4); }
  to { opacity: 0; transform: scale(2.4); }
}

/* ---------- Instruction panel ---------- */
.panel { max-width: 520px; width: 100%; }
.step-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.step-count { font-size: 13px; color: var(--muted); font-weight: 600; }
.progress {
  height: 8px;
  background: #e4e7d8;
  border-radius: 999px;
  overflow: hidden;
  width: 160px;
}
.progress > span {
  display: block;
  height: 100%;
  background: var(--green);
  transition: width 0.3s ease;
}
.panel h2 { margin: 6px 0 8px; font-size: 22px; }
.panel .instruction { font-size: 16px; line-height: 1.55; color: #333; }
.hintbox {
  margin-top: 16px;
  background: #fff6d6;
  border: 1px solid #ecd98a;
  color: #6b5a13;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 14px;
  display: none;
}
.hintbox.show { display: block; }
.hintbox b { display: block; margin-bottom: 2px; }

.cta {
  margin-top: 22px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
button.btn {
  font-size: 15px;
  font-weight: 700;
  border: none;
  border-radius: 10px;
  padding: 12px 22px;
  cursor: pointer;
}
button.btn.primary { background: var(--green); color: var(--ink); }
button.btn.primary:hover { background: var(--green-deep); }
button.btn.ghost { background: #eef0e4; color: var(--ink); }
button.btn.ghost:hover { background: #e2e6d4; }
button.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- Intro ---------- */
.intro h2 { font-size: 24px; margin: 2px 0 8px; }
.intro .body { font-size: 16px; line-height: 1.5; color: #333; }
.intro ul { margin: 10px 0 0; padding-left: 18px; color: #444; }
.intro li { margin: 3px 0; }
.panel.intro .cta { margin-top: 14px; }

/* ---------- Quiz ---------- */
.quiz h2 { font-size: 22px; }
.q-block {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 16px;
}
.q-block .q { font-weight: 700; margin-bottom: 12px; }
.opt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  margin-bottom: 8px;
  cursor: pointer;
}
.opt:hover { border-color: var(--green); }
.opt input { accent-color: var(--green-deep); }
.opt.correct { background: #eaf5d3; border-color: var(--green); }
.opt.wrong { background: #fde6e5; border-color: var(--danger); }

/* ---------- Result / certificate ---------- */
.result-card, .cert-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 30px;
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}
.result-card .score { font-size: 46px; font-weight: 800; color: var(--green-deep); }
.result-card.fail .score { color: var(--danger); }
.result-card p { color: #444; font-size: 16px; }
.namefield {
  width: 100%;
  font-size: 16px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  margin: 14px 0 6px;
}
.cert-preview {
  border: 1px solid var(--line);
  border-radius: 10px;
  margin: 18px auto 0;
  max-width: 100%;
}

/* ---------- Device / admin display disclaimer ---------- */
.device-note {
  background: #fbfcf4;
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: 8px;
  padding: 12px 14px;
  margin: 16px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-2);
}
.device-note b { color: var(--green-deep); }