/* ---------------------------------------------------------------------------
   Wikipedians course — brand variables. Change colours/fonts once, here.
   --------------------------------------------------------------------------- */
:root {
  --ink: #202122;
  --paper: #fbfcfd;
  --muted: #54595d;
  --accent: #3366cc;        /* Wikimedia blue */
  --accent-dark: #2a4b8d;
  --tint: #eaf3ff;          /* light blue wash, used like the reference's cream */
  --line: #dde3ea;
  --red: #b32424;
  --green: #14866d;
  --card: #ffffff;
  --radius: 9px;
  --font-head: Impact, "Arial Narrow Bold", "Helvetica Neue", Arial, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; background: var(--paper); }
body { background: var(--paper); color: var(--ink); font-family: var(--font-body); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; background: var(--tint); border-radius: 3px; padding: 0 .3em; }
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: #fff; padding: .5em 1em; z-index: 300; }
.skip:focus { left: 1rem; }

h1, h2, h3, h4, .headline { font-family: var(--font-head); font-weight: 900; text-transform: uppercase; letter-spacing: .025em; line-height: .98; color: var(--ink); }

/* progress bar */
#progress-bar { position: fixed; top: 0; left: 0; height: 4px; width: 0; background: var(--accent); z-index: 200; transition: width .35s ease; }

/* masthead */
header.masthead { background: #202122; color: #fff; text-align: center; padding: 32px 20px 26px; }
header.masthead .logo { width: 88px; height: 88px; border-radius: 50%; border: 2px solid var(--accent); padding: 3px; background: #000; display: inline-grid; place-items: center; font-family: Georgia, "Times New Roman", serif; font-size: 52px; color: #fff; line-height: 1; }
header.masthead h1 { font-size: clamp(30px, 5vw, 52px); margin-top: 14px; color: #fff; }
header.masthead h1 span { color: #7fb0ff; }
header.masthead p.sub { color: #a2a9b1; font-size: 13px; letter-spacing: 1.5px; text-transform: uppercase; margin-top: 6px; }
header.masthead p.tag { color: #e6e9ec; font-size: 15px; max-width: 600px; margin: 14px auto 0; }
header.masthead p.tag b { color: #fff; }

/* sticky tabs */
nav.tabs { position: sticky; top: 0; z-index: 100; background: #fff; border-bottom: 2px solid var(--line); display: flex; flex-wrap: wrap; justify-content: center; gap: 2px; padding: 4px 8px; box-shadow: 0 2px 8px rgba(0,0,0,.06); }
nav.tabs button { background: transparent; border: none; cursor: pointer; color: var(--muted); font: inherit; font-weight: 750; text-transform: uppercase; font-size: 13px; letter-spacing: .08em; padding: 11px 15px; border-bottom: 3px solid transparent; transition: color .2s, border-color .2s; }
nav.tabs button:hover { color: var(--ink); }
nav.tabs button.active { color: var(--accent-dark); border-bottom-color: var(--accent); }
nav.tabs button.complete::after { content: " ✓"; color: var(--green); }

/* modules */
main { max-width: 900px; margin: 0 auto; padding: 38px 20px 90px; }
section.module { display: none; }
section.module.active { display: block; animation: fade .3s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.module-head { margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.module-head .kicker { color: var(--accent-dark); font-weight: 800; font-size: 11px; letter-spacing: 2px; text-transform: uppercase; display: block; margin-bottom: 6px; }
.module-head h2 { font-size: clamp(30px, 5vw, 50px); margin-top: 4px; }
.module-head p { color: var(--muted); font-size: 15px; margin-top: 8px; }
.module-foot { display: flex; justify-content: space-between; gap: 12px; margin-top: 28px; }

/* lesson card */
.lesson { background: var(--card); border: 1px solid var(--line); border-top: 3px solid var(--accent); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; box-shadow: 0 1px 4px rgba(0,0,0,.04); transition: border-color .3s; }
.lesson.done { border-top-color: var(--green); }
.lesson-header { width: 100%; display: flex; align-items: center; gap: 14px; background: transparent; border: none; cursor: pointer; text-align: left; color: var(--ink); padding: 17px 20px; font: inherit; }
.lesson-header:hover { background: #f4f7fb; }
.lesson-num { flex: 0 0 auto; width: 36px; height: 36px; border-radius: 7px; background: var(--tint); color: var(--accent-dark); font-family: var(--font-head); font-size: 19px; display: grid; place-items: center; }
.lesson.done .lesson-num { background: #dff3ea; color: var(--green); }
.lesson-titles { flex: 1; }
.lesson-titles .lt, .lesson-titles .lm { display: block; }
.lesson-titles .lt { font-family: var(--font-head); font-size: 20px; text-transform: uppercase; letter-spacing: .3px; }
.lesson-titles .lm { color: var(--muted); font-size: 12px; letter-spacing: .4px; }
.chevron { color: var(--accent); font-size: 17px; transition: transform .3s; flex: 0 0 auto; }
.lesson.collapsed .chevron { transform: rotate(-90deg); }
.lesson-body { padding: 0 20px 22px; border-top: 1px solid var(--line); }
.lesson.collapsed .lesson-body { display: none; }
.lesson-body p { margin: 10px 0; }
.lesson-body ul { margin: 8px 0 8px 22px; }
.lesson-body li { margin: 4px 0; }
.lesson-body h4 { font-family: var(--font-body); text-transform: none; letter-spacing: 0; font-size: 15px; font-weight: 700; margin: 18px 0 6px; color: var(--accent-dark); }

/* content blocks */
.concept-block { background: var(--tint); border-left: 4px solid var(--accent); border-radius: 0 var(--radius) var(--radius) 0; padding: 14px 18px; margin: 16px 0; }
.block-label { color: var(--accent-dark); font-size: 10px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; display: block; margin-bottom: 6px; }
.concept-block p { font-size: 15px; margin: 4px 0; }

.define-box { display: flex; gap: 12px; align-items: flex-start; padding: 11px 0; border-bottom: 1px solid var(--line); }
.define-box:last-child { border-bottom: none; }
.define-box .ico { font-size: 20px; flex: 0 0 auto; line-height: 1.4; }
.define-box .term { color: var(--accent-dark); font-weight: 700; }
.define-box .desc { font-size: 15px; }

.step-list { margin: 14px 0; }
.step-item { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 12px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.step-item:last-child { border-bottom: none; }
.step-n { flex: 0 0 auto; min-width: 30px; height: 30px; border-radius: 6px; background: var(--accent); color: #fff; font-family: var(--font-head); font-size: 14px; display: grid; place-items: center; padding: 0 6px; }
.step-item div { font-size: 15px; }
.step-item b { color: var(--accent-dark); }

.bad-good { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 16px 0; }
.bad-good > div { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; font-size: 14px; }
.bad-good .bad { border-top: 3px solid var(--red); }
.bad-good .good { border-top: 3px solid var(--green); }
.bad-good .tagline { font-size: 10px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; display: block; margin-bottom: 8px; }
.bad-good .bad .tagline { color: var(--red); }
.bad-good .good .tagline { color: var(--green); }
.bad-good p { margin: 4px 0; font-size: 14px; }

.example-card { background: #eef8f4; border-left: 3px solid var(--green); border-radius: 0 var(--radius) var(--radius) 0; padding: 14px 18px; margin: 16px 0; font-size: 14px; }
.example-card .block-label { color: var(--green); }

.template-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin: 14px 0; position: relative; }
.template-card pre { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; white-space: pre-wrap; word-break: break-word; line-height: 1.7; }
.copy-btn { position: absolute; top: 14px; right: 14px; background: var(--accent); color: #fff; border: none; font: inherit; font-size: 10px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; padding: 5px 12px; border-radius: 4px; cursor: pointer; }
.copy-btn:hover { background: var(--accent-dark); }
.copy-btn.copied { background: #888; }

.note-block { background: var(--tint); border: 1px dashed #9fbfea; border-radius: var(--radius); padding: 13px 17px; font-size: 14px; margin: 14px 0; }
.note-block b { color: var(--accent-dark); }
.warning-block { background: #fff5f5; border-left: 3px solid var(--red); border-radius: 0 var(--radius) var(--radius) 0; padding: 13px 17px; font-size: 14px; margin: 14px 0; }
.warning-block b { color: var(--red); }

.quote-block { margin: 18px 0; padding: 16px 20px; border-left: 4px solid var(--ink); background: #f8f9fa; border-radius: 0 var(--radius) var(--radius) 0; }
.quote-block .block-label { color: var(--ink); }
.quote-block p { font-style: italic; font-size: 15px; }
.quote-block cite { display: block; margin-top: 8px; font-size: 12px; color: var(--muted); font-style: normal; }

table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 14px; }
th, td { border: 1px solid var(--line); padding: 9px 11px; text-align: left; vertical-align: top; }
th { background: #f4f7fb; font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }

/* practice */
.practice-box { background: var(--tint); border: 1px solid #9fbfea; border-radius: var(--radius); padding: 18px 20px; margin: 16px 0; }
.practice-box p { font-size: 14px; margin-bottom: 10px; }
.practice-box textarea, .practice-box input[type=text] { width: 100%; padding: 11px 13px; background: #fff; border: 1px solid var(--line); border-radius: 6px; font: inherit; font-size: 14px; color: var(--ink); resize: vertical; min-height: 80px; outline: none; }
.practice-box input[type=text] { min-height: 0; }
.practice-box textarea:focus, .practice-box input:focus { border-color: var(--accent); }
.check-btn { background: var(--accent); color: #fff; border: none; font: inherit; font-size: 12px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; padding: 10px 22px; border-radius: 5px; cursor: pointer; margin-top: 10px; }
.check-btn:hover { background: var(--accent-dark); }
.feedback-box { font-size: 13px; padding: 10px 14px; border-radius: 6px; display: none; margin-top: 10px; }
.feedback-box.show { display: block; }
.feedback-box.pass { background: #dff3ea; color: #14532d; border-left: 3px solid var(--green); }
.feedback-box.fail { background: #ffefef; color: #7f1d1d; border-left: 3px solid var(--red); }

/* quiz */
.quiz-block { background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--accent); border-radius: var(--radius); padding: 20px; margin: 18px 0; }
.quiz-block .q-text { font-size: 15px; font-weight: 600; margin-bottom: 14px; }
.quiz-options { display: flex; flex-direction: column; gap: 8px; }
.quiz-opt { background: #f4f7fb; border: 1px solid var(--line); color: var(--ink); font: inherit; font-size: 13px; padding: 11px 15px; border-radius: 6px; cursor: pointer; text-align: left; }
.quiz-opt:hover { border-color: var(--accent); background: var(--tint); }
.quiz-opt.correct { background: #dff3ea; border-color: var(--green); color: #14532d; }
.quiz-opt.wrong { background: #ffefef; border-color: var(--red); color: #7f1d1d; }
.quiz-result { font-size: 13px; padding: 10px 14px; border-radius: 6px; display: none; margin-top: 10px; }
.quiz-result.show { display: block; }
.quiz-result.pass { background: #dff3ea; color: #14532d; border-left: 3px solid var(--green); }
.quiz-result.fail { background: #ffefef; color: #7f1d1d; border-left: 3px solid var(--red); }

/* mark done */
.mark-done { width: 100%; margin-top: 18px; padding: 12px; background: transparent; border: 2px solid var(--accent); color: var(--accent-dark); font: inherit; font-size: 12px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; border-radius: 6px; cursor: pointer; transition: all .2s; }
.mark-done:hover { background: var(--accent); color: #fff; }
.mark-done.done { background: var(--green); border-color: var(--green); color: #fff; cursor: default; }

/* screenshots (VE guide) */
figure.shot { margin: 14px 0 18px; }
figure.shot img { display: block; max-width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
figure.shot.small img { max-width: 420px; }
figure.shot figcaption { font-size: 12px; color: var(--muted); margin-top: 6px; }

/* three-tier assignment */
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin: 16px 0; }
.tier { background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--accent); border-radius: var(--radius); padding: 14px 16px; font-size: 14px; }
.tier ol { margin: 6px 0 0 18px; }
.tier li { margin: 5px 0; }

/* perennial sources lookup */
.rsp-status { font-size: 12px; color: var(--muted); margin: 4px 0 8px; }
.rsp-results { display: flex; flex-direction: column; gap: 10px; }
.rsp-item { background: #fff; border: 1px solid var(--line); border-left: 5px solid var(--line); border-radius: var(--radius); padding: 12px 14px; font-size: 14px; }
.rsp-item.ok { border-left-color: var(--green); }
.rsp-item.warn { border-left-color: #ac6600; }
.rsp-item.bad { border-left-color: var(--red); }
.rsp-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; align-items: baseline; }
.rsp-badge { font-size: 10px; font-weight: 800; letter-spacing: 1.2px; text-transform: uppercase; padding: 3px 8px; border-radius: 20px; background: #f4f7fb; color: var(--muted); }
.rsp-item.ok .rsp-badge { background: #dff3ea; color: #14532d; }
.rsp-item.warn .rsp-badge { background: #fff4dd; color: #7a4a00; }
.rsp-item.bad .rsp-badge { background: #ffefef; color: #7f1d1d; }
.rsp-summary { margin: 8px 0 4px; }
.rsp-meta { font-size: 12px; color: var(--muted); margin: 0; }
.rsp-none { font-size: 13px; color: var(--muted); }

/* lookup forms (impact) */
.tool-form { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.tool-form input { flex: 1 1 220px; font: inherit; padding: 10px 13px; border: 1px solid var(--line); border-radius: 6px; }
.tool-links { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 14px; }
.tool-links .wn-btn { padding: 8px 14px; font-size: 12px; }

/* What's next */
.whats-next-hero { text-align: center; padding: 44px 20px 36px; background: radial-gradient(circle at 50% -10%, #2a4b8d, #202122 60%); border-radius: var(--radius); color: #fff; margin-bottom: 32px; }
.wn-eyebrow { display: block; font-size: 10px; font-weight: 800; letter-spacing: 3px; color: #7fb0ff; text-transform: uppercase; margin-bottom: 12px; }
.wn-headline { font-size: clamp(26px, 5vw, 42px); color: #fff; margin-bottom: 10px; }
.wn-sub { font-size: 14px; color: #c8ccd1; max-width: 520px; margin: 0 auto; line-height: 1.65; }
.wn-section-label { font-size: 10px; font-weight: 800; letter-spacing: 2.5px; color: var(--accent-dark); text-transform: uppercase; border-bottom: 1px solid var(--line); padding-bottom: 8px; margin: 32px 0 18px; }
.wn-resources-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; margin-bottom: 32px; }
.wn-resource-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: flex; flex-direction: column; gap: 10px; box-shadow: 0 1px 4px rgba(0,0,0,.05); }
.wn-badge { align-self: flex-start; font-size: 10px; font-weight: 800; letter-spacing: 1.5px; color: var(--muted); text-transform: uppercase; border: 1px solid var(--line); border-radius: 20px; padding: 3px 10px; }
.wn-card-title { font-family: var(--font-head); font-size: 21px; line-height: 1.15; text-transform: uppercase; }
.wn-card-body { font-size: 13px; color: var(--muted); line-height: 1.65; flex: 1; }
.wn-card-bullets { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.wn-card-bullets li { font-size: 12px; color: var(--muted); padding-left: 16px; position: relative; }
.wn-card-bullets li::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-size: 11px; }
.wn-btn { display: inline-block; text-align: center; padding: 12px 20px; font: inherit; font-size: 13px; font-weight: 800; text-decoration: none; border-radius: 6px; letter-spacing: .4px; cursor: pointer; transition: background .2s, color .2s; }
.wn-btn-solid { background: var(--accent); color: #fff; border: none; }
.wn-btn-solid:hover { background: var(--accent-dark); color: #fff; }
.wn-btn-outline { background: transparent; border: 2px solid var(--accent); color: var(--accent-dark); }
.wn-btn-outline:hover { background: var(--tint); color: var(--accent-dark); }
.wn-btn-block { display: block; }

/* footer */
footer.site-footer { max-width: 900px; margin: 0 auto; padding: 24px 20px 40px; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; align-items: center; }
footer.site-footer button { background: none; border: 1px solid var(--line); border-radius: 5px; font: inherit; font-size: 12px; color: var(--muted); padding: 5px 10px; cursor: pointer; }
footer.site-footer button:hover { color: var(--red); border-color: var(--red); }

@media (max-width: 640px) {
  .bad-good { grid-template-columns: 1fr; }
  nav.tabs button { font-size: 11px; padding: 10px 9px; letter-spacing: .05em; }
  .lesson-titles .lt { font-size: 17px; }
  .module-foot { flex-direction: column; }
  main { padding: 26px 14px 70px; }
}
@media print { nav.tabs, .mark-done, .check-btn, .copy-btn, #progress-bar { display: none; } section.module { display: block !important; } .lesson.collapsed .lesson-body { display: block; } }