/* Deutsch A1 site: lavender accent from the PDF book, ink text, soft paper ground */
:root {
  --bg: #f4f5f9; --paper: #ffffff; --ink: #1b1e2b; --muted: #5b6072; --line: #e0e3ee;
  --accent: #5363cf; --accent-soft: #eceefb; --accent-2: #8f99e0;
  --display: "Bricolage Grotesque", "Inter", system-ui, sans-serif; --body: "Inter", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) { :root {
  --bg: #12141c; --paper: #1a1d28; --ink: #e8eaf2; --muted: #a0a6b8; --line: #2c3142;
  --accent: #9aa5f5; --accent-soft: #252a45; --accent-2: #7c87da; color-scheme: dark; } }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 var(--body); }
a { color: var(--accent); }

nav.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
nav.top .in { max-width: 1080px; margin: 0 auto; padding: 10px 16px; display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
nav.top .brand { font: 800 18px var(--display); color: var(--ink); text-decoration: none; margin-right: auto; }
nav.top .links { display: flex; gap: 4px; flex-wrap: wrap; }
nav.top .links a { text-decoration: none; color: var(--muted); font-weight: 600; font-size: 14px; padding: 6px 10px; border-radius: 8px; }
nav.top .links a:hover { background: var(--accent-soft); color: var(--ink); }
nav.top .links a.on { background: var(--accent); color: var(--paper); }

.hero { padding: 64px 16px 48px; background: radial-gradient(1200px 300px at 20% 0%, var(--accent-soft), transparent); }
.hero .in { max-width: 1080px; margin: 0 auto; }
.kicker { font-weight: 700; font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--accent); }
.hero h1 { font: 800 clamp(40px, 7vw, 76px)/1.02 var(--display); margin: 10px 0 14px; letter-spacing: -0.02em; text-wrap: balance; }
.hero h1 span { color: var(--accent-2); }
.hero p { max-width: 60ch; color: var(--muted); font-size: 18px; margin: 0; }
.hero.small { padding: 40px 16px 28px; }
.hero.small h1 { font-size: clamp(30px, 5vw, 48px); }

main.home { max-width: 1080px; margin: 0 auto; padding: 8px 16px 48px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 20px; text-decoration: none; color: var(--ink); display: flex; flex-direction: column; gap: 6px; transition: transform .15s, border-color .15s; }
.card:hover { transform: translateY(-2px); border-color: var(--accent-2); }
.card .ck { font-size: 12px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: .1em; }
.card h3 { font: 800 22px var(--display); margin: 0; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; flex: 1; }
.card .go { font-weight: 700; color: var(--accent); font-size: 14px; margin-top: 8px; }
.plan { margin-top: 40px; background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 24px; }
.plan h2 { font: 800 26px var(--display); margin: 0 0 6px; }
.plan > p { color: var(--muted); margin: 0 0 16px; max-width: 70ch; }
.plan ol.weeks { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px; }


main.reader { max-width: 820px; margin: 0 auto; padding: 0 16px 64px; }
.toc { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 12px 18px; margin-bottom: 28px; }
.toc summary { font-weight: 700; cursor: pointer; }
.toc ol { columns: 2 260px; margin: 10px 0 4px; padding-left: 22px; font-size: 14px; }
.toc li { break-inside: avoid; margin-bottom: 3px; }
article { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: clamp(18px, 4vw, 40px); min-width: 0; }
article h2 { font: 800 30px/1.15 var(--display); margin: 56px 0 14px; padding-top: 24px; border-top: 3px solid var(--accent-2); scroll-margin-top: 70px; }
article h2:first-child { margin-top: 0; }
article h3 { font: 700 20px var(--display); margin: 28px 0 8px; }
article h4 { font-size: 16px; margin: 22px 0 6px; color: var(--accent); }
article p, article li { max-width: 72ch; }
article em { color: color-mix(in srgb, var(--accent) 70%, var(--ink)); }
article blockquote { margin: 14px 0; padding: 12px 18px; background: var(--accent-soft); border-left: 4px solid var(--accent-2); border-radius: 0 10px 10px 0; }
article hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }
.tw { overflow-x: auto; margin: 10px 0 18px; }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
th { text-align: left; background: var(--accent-soft); padding: 8px 10px; border-bottom: 2px solid var(--accent-2); }
td { padding: 7px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.check { display: inline-block; width: 15px; height: 15px; border: 2px solid var(--accent); border-radius: 4px; vertical-align: -2px; margin-right: 8px; }
ul:has(.check) { list-style: none; padding-left: 0; }
figure.map { margin: 16px 0; } figure.map svg { width: 100%; height: auto; background: #fff; border-radius: 10px; }
.totop { position: fixed; right: 16px; bottom: 16px; background: var(--accent); color: var(--paper); text-decoration: none; font-weight: 700; padding: 8px 12px; border-radius: 999px; font-size: 14px; }
.foot { text-align: center; color: var(--muted); font-size: 13px; padding: 24px 16px 40px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }

/* ---- interactive 8-week plan ---- */
:root { --ok: #1f8a5b; --warn: #b26a00; --no: #c23a4b; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --ok: #5fd19c; --warn: #f0b456; --no: #ff8a98; } }
:root[data-theme="dark"] { --ok: #5fd19c; --warn: #f0b456; --no: #ff8a98; }
.plan-head { display: flex; flex-wrap: wrap; gap: 16px 32px; justify-content: space-between; align-items: flex-end; margin-bottom: 16px; }
.plan-head > div:first-child { flex: 1 1 380px; min-width: 0; }
.plan-head p { color: var(--muted); margin: 0; max-width: 70ch; }
.overall { display: flex; flex-direction: column; gap: 6px; min-width: 240px; font-weight: 600; font-size: 14px; font-variant-numeric: tabular-nums; }
.pbar { display: block; height: 8px; background: var(--line); border-radius: 99px; overflow: hidden; }
.pbar i { display: block; height: 100%; width: 0; background: var(--ok); border-radius: 99px; transition: width .3s; }
.reset { font-weight: 400; font-size: 13px; color: var(--muted); }
.linkish { all: unset; cursor: pointer; color: var(--accent); font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }
.linkish.danger { color: var(--no); }
.linkish:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.plan ol.weeks > li { display: flex; }
.wk { all: unset; box-sizing: border-box; width: 100%; height: 100%; cursor: pointer; display: flex; flex-direction: column; gap: 2px; background: var(--accent-soft); border: 2px solid transparent; border-radius: 10px; padding: 12px 14px; font-size: 14px; }
.wk:hover { border-color: var(--accent-2); }
.wk:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.wk.open { border-color: var(--accent); background: var(--paper); }
.wk-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.wk b { font: 800 16px var(--display); }
.wk em { font-style: normal; color: var(--accent); font-size: 13px; font-weight: 600; }
.mini { display: block; height: 5px; margin-top: 8px; background: color-mix(in srgb, var(--line) 80%, transparent); border-radius: 99px; overflow: hidden; }
.mini i { display: block; height: 100%; background: var(--ok); }
.chip { font-size: 11px; font-weight: 700; letter-spacing: .04em; padding: 2px 8px; border-radius: 99px; white-space: nowrap; }
.chip.todo { color: var(--muted); background: var(--paper); border: 1px solid var(--line); }
.chip.prog { color: var(--warn); background: color-mix(in srgb, var(--warn) 14%, var(--paper)); }
.chip.done { color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, var(--paper)); }
.wdetail { margin-top: 16px; border: 1px solid var(--line); border-radius: 12px; padding: clamp(14px, 3vw, 24px); background: var(--bg); min-width: 0; }
.wd-head { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; }
.wd-head h3 { font: 800 22px/1.2 var(--display); margin: 4px 0 0; text-wrap: balance; }
.x { font: inherit; font-size: 13px; font-weight: 600; cursor: pointer; border: 1px solid var(--line); background: var(--paper); color: var(--ink); border-radius: 8px; padding: 6px 10px; white-space: nowrap; }
.wd-prog { display: flex; align-items: center; gap: 12px; margin: 12px 0 16px; font-size: 14px; font-weight: 600; font-variant-numeric: tabular-nums; flex-wrap: wrap; }
.wd-prog .pbar { flex: 1 1 160px; }
.tabs2 { display: flex; gap: 6px; flex-wrap: wrap; border-bottom: 1px solid var(--line); margin-bottom: 16px; }
.tabs2 button { font: inherit; font-weight: 600; font-size: 14px; cursor: pointer; background: none; border: 0; border-bottom: 3px solid transparent; color: var(--muted); padding: 8px 10px; display: flex; gap: 8px; align-items: baseline; }
.tabs2 button small { font-weight: 500; font-size: 12px; font-variant-numeric: tabular-nums; }
.tabs2 button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.tabs2 button:focus-visible, .btn:focus-visible, .opt2:focus-visible, .x:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
ul.tasks { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
ul.tasks li { display: flex; gap: 12px; align-items: flex-start; background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
ul.tasks li > div { min-width: 0; }
ul.tasks li.checked { border-color: color-mix(in srgb, var(--ok) 45%, var(--line)); }
ul.tasks li.checked label { text-decoration: line-through; text-decoration-color: var(--muted); }
ul.tasks input[type=checkbox] { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--ok); flex: none; cursor: pointer; }
ul.tasks label { font-weight: 700; cursor: pointer; }
ul.tasks p { margin: 4px 0 0; color: var(--muted); font-size: 14.5px; }
ul.tasks li.optional { background: none; border-style: dashed; color: var(--muted); font-size: 14.5px; }
.day { display: inline-block; min-width: 40px; font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); margin-right: 6px; }
.kw { display: block; margin-top: 4px; color: var(--ink); font-weight: 600; }
.bonus { font-size: 14.5px; color: var(--muted); }
.hint { color: var(--muted); font-size: 14.5px; margin: 0 0 12px; }
ol.selftest { margin: 0 0 16px; padding-left: 22px; display: flex; flex-direction: column; gap: 10px; }
ol.selftest li { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
ol.selftest li.right { border-color: color-mix(in srgb, var(--ok) 55%, var(--line)); }
ol.selftest li.wrong { border-color: color-mix(in srgb, var(--no) 55%, var(--line)); }
ol.selftest .q { margin-bottom: 8px; }
ol.selftest .a { background: var(--accent-soft); border-radius: 8px; padding: 8px 10px; margin-bottom: 8px; }
ol.selftest .a span { font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-right: 6px; }
.mark { display: flex; gap: 8px; flex-wrap: wrap; }
.btn { font: inherit; font-size: 14px; font-weight: 600; cursor: pointer; padding: 7px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--paper); color: var(--ink); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--paper); }
li.right .btn[data-val="right"].on { background: var(--ok); border-color: var(--ok); color: var(--paper); }
li.wrong .btn[data-val="wrong"].on { background: var(--no); border-color: var(--no); color: var(--paper); }
.quizstart, .quiz2 { max-width: 620px; display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
.quizstart p { margin: 0; }
.quizstart .big, .qp .big { font: 800 clamp(24px, 4.5vw, 32px)/1.15 var(--display); }
.best { color: var(--muted); }
.count { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.qp { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 18px; width: 100%; }
.qp small { font-size: 12px; color: var(--muted); letter-spacing: .06em; text-transform: uppercase; }
.opts2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; width: 100%; }
@media (max-width: 520px) { .opts2 { grid-template-columns: minmax(0, 1fr); } }
.opt2 { font: inherit; text-align: left; cursor: pointer; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--paper); color: var(--ink); }
.opt2:disabled { cursor: default; }
.opt2.right { border-color: var(--ok); box-shadow: inset 0 0 0 1px var(--ok); }
.opt2.wrong { border-color: var(--no); box-shadow: inset 0 0 0 1px var(--no); }
.qf { display: flex; justify-content: space-between; align-items: center; gap: 8px; width: 100%; flex-wrap: wrap; min-height: 38px; }
.fb { font-weight: 600; } .fb.ok { color: var(--ok); } .fb.no { color: var(--no); }

/* iPhone install hint + safe areas when running as a home-screen app */
.iosbar { background: var(--accent); color: var(--paper); font-size: 14px; }
.iosbar .in { max-width: 1080px; margin: 0 auto; padding: 10px 16px; display: flex; gap: 12px; align-items: center; justify-content: space-between; }
.iosbar button { all: unset; cursor: pointer; padding: 2px 8px; font-weight: 700; }
nav.top .in { padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
nav.top { padding-top: env(safe-area-inset-top, 0px); top: 0; }
.foot { padding-bottom: calc(40px + env(safe-area-inset-bottom, 0px)); }

/* ---- v2: shared navigation (nav.js) ---- */
nav.top .links { align-items: center; }
nav.top details.res { position: relative; }
nav.top details.res summary { list-style: none; cursor: pointer; color: var(--muted); font-weight: 600; font-size: 14px; padding: 6px 10px; border-radius: 8px; }
nav.top details.res summary::-webkit-details-marker { display: none; }
nav.top details.res summary::after { content: " ▾"; font-size: 11px; }
nav.top details.res summary:hover, nav.top details.res[open] summary { background: var(--accent-soft); color: var(--ink); }
nav.top details.res summary.on { color: var(--ink); box-shadow: inset 0 -2px 0 var(--accent); }
nav.top details.res .menu { position: absolute; right: 0; top: calc(100% + 6px); background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 6px; min-width: 210px; box-shadow: 0 8px 24px rgba(0,0,0,.12); display: flex; flex-direction: column; z-index: 20; }
nav.top details.res .menu a { padding: 8px 10px; }
@media (max-width: 760px) {
  nav.top .in { padding: 8px 12px; gap: 8px; }
  nav.top .links { order: 3; width: 100%; flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; padding-bottom: 2px; }
  nav.top .links::-webkit-scrollbar { display: none; }
  nav.top .links a, nav.top details.res summary { white-space: nowrap; }
  nav.top details.res { position: static; }
  nav.top details.res .menu { right: 12px; left: auto; top: auto; margin-top: 6px; position: absolute; }
}
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }