/* Shared styles for every Ecommerce Club course. */
:root {
  --blue: #0A2BDA; --cream: #FBF7EC; --lime: #E2F69B; --yellow: #FFE680;
  --pink: #FDE4F1; --sky: #DDE9F5; --ink: #1f2937; --muted: #4b5563; --good: #1a7f37; --bad: #b00020;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--cream); color: var(--blue); font: 17px/1.55 "DM Sans", system-ui, sans-serif; }
a { color: var(--blue); }
button { font-family: inherit; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
h1, h2, h3, .ultra { font-family: Ultra, Georgia, serif; font-weight: 400; line-height: 1.05; margin: 0; }
.kicker { font-size: 13px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
header { padding: 16px 0; border-bottom: 2px solid var(--blue); background: var(--cream); position: sticky; top: 0; z-index: 20; }
header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
header img { height: 36px; width: auto; display: block; }
.hud { display: none; align-items: center; gap: 14px; font-weight: 800; font-size: 14px; }
.hud.on { display: flex; }
.xp-pill { background: var(--lime); border: 2px solid var(--blue); border-radius: 999px; padding: 5px 12px; white-space: nowrap; }
.lvl-pill { background: var(--yellow); border: 2px solid var(--blue); border-radius: 999px; padding: 5px 12px; white-space: nowrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font: 800 16px "DM Sans", sans-serif; color: var(--blue); background: var(--yellow); border: 2px solid var(--blue); border-radius: 4px; padding: 14px 24px; cursor: pointer; text-decoration: none; transition: background .15s, color .15s, transform .1s; }
.btn:hover:not(:disabled) { background: var(--blue); color: #fff; }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.ghost { background: transparent; }
.btn.small { font-size: 14px; padding: 8px 14px; }
.card { background: #fff; border: 2px solid var(--blue); border-radius: 16px; }
.err { color: var(--bad); font-weight: 700; min-height: 1.4em; margin: 8px 0 0; }

/* ---------- gate ---------- */
.gate { padding: 48px 0 64px; }
.gate-grid > * { min-width: 0; }
.gate-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: start; }
.gate h1 { font-size: clamp(38px, 6vw, 66px); margin: 12px 0 18px; }
.gate .lead { font-size: 19px; max-width: 48ch; margin: 0 0 24px; color: var(--ink); }
.perks { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 0 0 28px; padding: 0; list-style: none; }
.perks li { background: #fff; border: 2px solid var(--blue); border-radius: 12px; padding: 12px 14px; font-weight: 700; font-size: 15px; }
.perks li b { display: block; font-family: Ultra, serif; font-weight: 400; font-size: 22px; }
.mod-preview { display: grid; gap: 8px; }
.mod-preview div { display: flex; gap: 12px; align-items: center; font-weight: 700; }
.mod-preview span.n { flex: none; width: 34px; height: 34px; border-radius: 50%; border: 2px solid var(--blue); display: grid; place-items: center; background: var(--lime); font-size: 14px; }
.enroll { padding: 28px; position: sticky; top: 92px; box-shadow: 8px 8px 0 var(--blue); }
.enroll h2 { font-size: 30px; margin-bottom: 6px; }
.enroll p { margin: 0 0 18px; color: var(--ink); }
.field { display: grid; gap: 6px; margin-bottom: 14px; font-weight: 800; font-size: 14px; }
.field input, .field textarea, .field select { font: 500 17px "DM Sans", sans-serif; color: var(--blue); padding: 13px 14px; border: 2px solid var(--blue); border-radius: 6px; background: #fff; width: 100%; }
.field input:focus, .field textarea:focus { outline: 3px solid var(--lime); outline-offset: 1px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; line-height: 1.45; margin: 4px 0 16px; color: var(--ink); }
.consent input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--blue); flex: none; }
.enroll .btn { width: 100%; }
.fine { font-size: 13px; color: var(--muted); margin-top: 12px; }

/* ---------- course ---------- */
.course { display: none; padding: 28px 0 80px; }
.course.on { display: block; }
.layout { display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 28px; align-items: start; }
.layout > * { min-width: 0; }
.side { position: sticky; top: 90px; padding: 18px; }
.side h3 { font-size: 18px; margin-bottom: 4px; }
.bar { height: 14px; border: 2px solid var(--blue); border-radius: 999px; background: #fff; overflow: hidden; margin: 10px 0 4px; }
.bar i { display: block; height: 100%; background: var(--blue); width: 0; transition: width .5s; }
.side small { font-weight: 700; color: var(--muted); }
.mods { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 6px; }
.mods button { width: 100%; text-align: left; display: flex; gap: 10px; align-items: center; background: transparent; border: 2px solid transparent; border-radius: 10px; padding: 8px 10px; color: var(--blue); font-weight: 700; font-size: 15px; cursor: pointer; }
.mods button:hover { background: var(--cream); }
.mods button.cur { border-color: var(--blue); background: var(--lime); }
.mods .ic { flex: none; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; border: 2px solid var(--blue); background: #fff; font-size: 15px; }
.mods button.done .ic { background: var(--blue); color: #fff; }
.mods button.locked { opacity: .45; }
.side .who { margin-top: 16px; font-size: 13px; color: var(--muted); border-top: 2px dashed var(--blue); padding-top: 12px; }
.side .who button { background: none; border: 0; padding: 0; color: var(--blue); text-decoration: underline; cursor: pointer; font-size: 13px; }

.main > section { margin-bottom: 22px; }
.mhead { padding: 28px; background: var(--blue); color: #fff; border-radius: 16px; position: relative; overflow: hidden; }
.mhead .kicker { color: var(--lime); }
.mhead h2 { font-size: clamp(30px, 4.5vw, 48px); margin: 10px 0 12px; max-width: 18ch; }
.mhead p { margin: 0; max-width: 60ch; font-size: 18px; color: #e8ecff; }
.mhead .badge-big { position: absolute; right: 24px; top: 22px; font-size: 64px; transform: rotate(8deg); }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.meta span { background: rgba(255,255,255,.14); border: 1.5px solid rgba(255,255,255,.4); border-radius: 999px; padding: 4px 12px; font-size: 13px; font-weight: 700; }
.sec-title { display: flex; align-items: center; gap: 10px; margin: 0 0 12px; }
.sec-title h3 { font-size: 24px; }
.sec-title .tag { font-size: 12px; font-weight: 800; letter-spacing: .14em; border: 2px solid var(--blue); border-radius: 999px; padding: 3px 10px; background: var(--yellow); }
.ideas { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.idea { padding: 18px; }
.idea b { display: block; font-size: 17px; margin-bottom: 6px; }
.idea p { margin: 0; color: var(--ink); font-size: 15.5px; }
.idea:nth-child(4n+1) { background: #fff; } .idea:nth-child(4n+2) { background: var(--pink); }
.idea:nth-child(4n+3) { background: var(--sky); } .idea:nth-child(4n+4) { background: var(--lime); }
.tip { padding: 16px 18px; background: var(--yellow); font-size: 15.5px; color: var(--ink); }
.tip b { color: var(--blue); }
.warn { padding: 16px 18px; background: var(--pink); font-size: 15.5px; color: var(--ink); }
.warn b { color: var(--blue); }

.prompt { padding: 0; overflow: hidden; margin-bottom: 12px; }
.prompt .ph { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 10px 14px; background: var(--blue); color: #fff; }
.prompt .ph b { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; }
.prompt .ph button { background: var(--lime); color: var(--blue); border: 2px solid var(--lime); border-radius: 4px; font-weight: 800; font-size: 13px; padding: 5px 12px; cursor: pointer; white-space: nowrap; }
.prompt .ph button.ok { background: #fff; border-color: #fff; }
.prompt .pb { padding: 14px 16px; font-size: 15.5px; color: var(--ink); white-space: pre-wrap; }
.slot { background: var(--yellow); border-radius: 3px; padding: 0 3px; color: var(--blue); font-weight: 700; }
.slot.filled { background: var(--lime); }
.prompt .pw { padding: 0 16px 14px; font-size: 13px; color: var(--muted); }

.profile { padding: 22px; background: var(--lime); }
.profile p { margin: 0 0 14px; color: var(--ink); }
.profile .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.profile .saved { font-weight: 800; font-size: 14px; color: var(--good); min-height: 1.3em; }

.calc { padding: 22px; background: var(--sky); }
.calc .grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0 12px; }
.calc .out { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 6px; }
.calc .out div { background: #fff; border: 2px solid var(--blue); border-radius: 12px; padding: 12px; text-align: center; }
.calc .out b { display: block; font-family: Ultra, serif; font-weight: 400; font-size: 28px; }
.calc .out small { font-weight: 700; font-size: 13px; }
.calc .note { font-size: 13px; color: var(--muted); margin: 10px 0 0; }

.mission { padding: 20px 22px; }
.mission ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.mission label { display: flex; gap: 12px; align-items: flex-start; padding: 10px 12px; border: 2px solid var(--blue); border-radius: 10px; cursor: pointer; background: var(--cream); transition: background .15s; }
.mission label:hover { background: #fff; }
.mission input { width: 22px; height: 22px; accent-color: var(--blue); flex: none; margin-top: 1px; }
.mission label.on { background: var(--lime); }
.mission label.on span { text-decoration: line-through; text-decoration-thickness: 2px; opacity: .75; }
.mission .xp { margin-left: auto; font-size: 12px; font-weight: 800; white-space: nowrap; opacity: .7; }

.quiz { padding: 22px; }
.q { margin-bottom: 18px; }
.q p { font-weight: 800; margin: 0 0 8px; }
.q .opts { display: grid; gap: 8px; }
.q button { text-align: left; background: #fff; border: 2px solid var(--blue); border-radius: 10px; padding: 10px 14px; font-size: 15.5px; color: var(--blue); cursor: pointer; font-weight: 500; }
.q button:hover:not(:disabled) { background: var(--cream); }
.q button.right { background: var(--lime); font-weight: 800; }
.q button.wrong { background: var(--pink); text-decoration: line-through; }
.q button:disabled { cursor: default; }
.q .fb { font-size: 14.5px; margin-top: 8px; color: var(--ink); min-height: 0; }
.q .fb b { color: var(--blue); }

.finish { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; padding: 22px; background: var(--yellow); }
.finish p { margin: 0; font-weight: 700; }
.navrow { display: flex; justify-content: space-between; gap: 10px; margin-top: 10px; }

/* ---------- certificate ---------- */
.cert { padding: 44px 36px; text-align: center; border-width: 4px; box-shadow: 10px 10px 0 var(--blue); background: #fff; position: relative; }
.cert:before { content: ""; position: absolute; inset: 10px; border: 2px dashed var(--blue); border-radius: 10px; pointer-events: none; }
.cert img { height: 52px; margin-bottom: 18px; }
.cert .ultra { font-size: clamp(30px, 5vw, 52px); margin: 10px 0; }
.cert .nm { font-family: Ultra, serif; font-size: clamp(28px, 5vw, 46px); border-bottom: 3px solid var(--lime); display: inline-block; padding: 0 14px 4px; margin: 8px 0 14px; }
.cert p { color: var(--ink); max-width: 52ch; margin: 0 auto 10px; }
.badges { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 18px 0 8px; font-size: 30px; }
.next { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.next a { text-decoration: none; padding: 18px; display: block; }
.next a b { display: block; font-size: 18px; margin-bottom: 4px; }
.next a span { color: var(--ink); font-size: 15px; }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 140%); background: var(--blue); color: #fff; border: 2px solid var(--lime); border-radius: 12px; padding: 12px 18px; font-weight: 800; z-index: 50; visibility: hidden; transition: transform .35s cubic-bezier(.2,1.4,.4,1), visibility 0s .35s; max-width: calc(100% - 32px); text-align: center; }
.toast.on { transform: translate(-50%, 0); visibility: visible; transition: transform .35s cubic-bezier(.2,1.4,.4,1); }
#confetti { position: fixed; inset: 0; pointer-events: none; z-index: 40; }

footer { border-top: 2px solid var(--blue); padding: 24px 0; font-size: 14px; color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; }

@media (max-width: 900px) {
  .gate-grid, .layout { grid-template-columns: minmax(0, 1fr); }
  .enroll, .side { position: static; }
  .mods { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .calc .grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  header img { height: 28px; }
  .hud .lvl-pill { display: none; }
  .perks, .row2, .profile .grid, .ideas { grid-template-columns: 1fr; }
  .mods { grid-template-columns: 1fr 1fr; }
  .calc .out { grid-template-columns: 1fr; }
  .mhead .badge-big { font-size: 42px; right: 14px; top: 14px; }
  .mhead h2 { padding-right: 40px; }
}
@media print {
  header, footer, .side, .course .main > :not(.cert-wrap), .toast, #confetti, .gate { display: none !important; }
  .layout { display: block; }
  .cert { box-shadow: none; }
}
.known-only { display: none; }
.enroll.known .known-only { display: block; }
.enroll.known .new-only { display: none; }
.linkish { background: none; border: 0; padding: 0; color: var(--blue); text-decoration: underline; cursor: pointer; font: inherit; }