:root {
  --bg: #fdfbf7; --panel: #ffffff; --side: #f6efe6; --ink: #1f2933; --muted: #6b7280; --line: #e8e0d4;
  --accent: #c2410c; --accent-soft: #fff1e6; --he: #1d4ed8; --she: #be185d; --other: #047857;
  --hl: #fff3c4; --ok: #15803d; --no: #b91c1c;
  --b-brain: #ecfdf3; --b-brain-l: #86d4a8; --b-say: #eef4ff; --b-say-l: #9db8f5; --b-tip: #fef9e7; --b-tip-l: #e5c77a; --b-sos: #fdecec; --b-sos-l: #f0a3a3;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17171a; --panel: #202024; --side: #121214; --ink: #ecebe8; --muted: #a3a3aa; --line: #34343a;
    --accent: #fb923c; --accent-soft: #3a2415; --he: #93b4ff; --she: #f9a8d4; --other: #6ee7b7;
    --hl: #3d3517; --ok: #4ade80; --no: #f87171;
    --b-brain: #15291e; --b-brain-l: #2f6b48; --b-say: #172036; --b-say-l: #3a5391; --b-tip: #2a2616; --b-tip-l: #6b5a26; --b-sos: #331818; --b-sos-l: #7a3434;
  }
}
:root[data-theme="dark"] {
  --bg: #17171a; --panel: #202024; --side: #121214; --ink: #ecebe8; --muted: #a3a3aa; --line: #34343a;
  --accent: #fb923c; --accent-soft: #3a2415; --he: #93b4ff; --she: #f9a8d4; --other: #6ee7b7;
  --hl: #3d3517; --ok: #4ade80; --no: #f87171;
  --b-brain: #15291e; --b-brain-l: #2f6b48; --b-say: #172036; --b-say-l: #3a5391; --b-tip: #2a2616; --b-tip-l: #6b5a26; --b-sos: #331818; --b-sos-l: #7a3434;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--ink); font: 18px/1.55 "Segoe UI", system-ui, sans-serif; display: flex; }

#sidebar { width: 320px; flex: none; background: var(--side); border-right: 1px solid var(--line); height: 100vh; overflow-y: auto; padding: 18px 12px; position: sticky; top: 0; }
.brand { font: 700 22px Georgia, serif; color: var(--accent); padding: 0 8px 14px; }
.brand small { display: block; font: 13px "Segoe UI", sans-serif; color: var(--muted); margin-top: 4px; }
#lessonList a, .navlink { display: flex; gap: 10px; align-items: center; padding: 8px 10px; border-radius: 9px; color: var(--ink); text-decoration: none; font-size: 15.5px; }
#lessonList a:hover, .navlink:hover { background: var(--accent-soft); }
#lessonList a.active, .navlink.active { background: var(--accent); color: #fff; }
#lessonList .pic { font-size: 22px; width: 28px; text-align: center; }
#lessonList .done { margin-left: auto; color: var(--ok); font-weight: 700; }
#lessonList a.active .done { color: #fff; }
.navsep { border-top: 1px solid var(--line); margin: 12px 8px; }
#userBox { display: flex; gap: 8px; align-items: center; padding: 4px 10px; font-size: 15.5px; }
#userBox a { margin-left: auto; color: var(--accent); }

/* login */
body.login-page { align-items: center; justify-content: center; padding: 16px; }
.login { width: 100%; max-width: 400px; background: var(--panel); border: 1.5px solid var(--line); border-radius: 18px; padding: 26px 28px 30px; display: flex; flex-direction: column; }
.login .pics, .login h1, .login .hint { text-align: center; }
.login .hint { color: var(--muted); margin: 4px 0 14px; }
.login .error { background: var(--b-sos); border: 1.5px solid var(--b-sos-l); border-radius: 10px; padding: 8px 12px; margin: 0 0 6px; font-size: 16px; }
.login label { font-size: 15.5px; color: var(--muted); margin: 10px 0 4px; }
.login input[type="text"], .login input[type="password"] { font: inherit; padding: 10px 12px; border-radius: 9px; border: 1.5px solid var(--line); background: var(--bg); color: var(--ink); }
.login input:focus { outline: none; border-color: var(--accent); }
.login .remember { color: var(--ink); margin: 16px 0 18px; }

main { flex: 1; min-width: 0; height: 100vh; overflow-y: auto; }
#toolbar { position: sticky; top: 0; z-index: 5; display: flex; flex-wrap: wrap; gap: 10px 20px; align-items: center; padding: 10px 26px; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(6px); border-bottom: 1px solid var(--line); }
#toolbar .group { display: flex; gap: 5px; align-items: center; }
#toolbar .label { font-size: 14px; color: var(--muted); margin-right: 4px; }
button { font: inherit; font-size: 15.5px; border: 1.5px solid var(--line); background: var(--panel); color: var(--ink); border-radius: 9px; padding: 6px 12px; cursor: pointer; }
button:hover { border-color: var(--accent); }
button.active, button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.big { font-size: 17px; padding: 10px 18px; }
button.ghost { border: none; background: none; font-size: 24px; padding: 2px 6px; }
.toggle { font-size: 15.5px; display: flex; gap: 6px; align-items: center; cursor: pointer; }
.toggle input { width: 18px; height: 18px; }
#menuBtn { display: none; }

#content { max-width: 900px; margin: 0 auto; padding: 26px 26px 140px; }
h1 { font: 700 32px/1.25 Georgia, serif; color: var(--accent); margin: 6px 0 2px; }
h2 { font: 700 23px Georgia, serif; margin: 34px 0 12px; }
h3 { font-size: 18px; color: var(--accent); margin: 18px 0 6px; }
.subtitle { color: var(--muted); font-style: italic; margin-bottom: 10px; font-size: 19px; }
.pics { font-size: 64px; letter-spacing: 12px; margin: 4px 0 10px; }
.context { background: var(--accent-soft); border-radius: 12px; padding: 14px 20px; margin-bottom: 18px; }
.context p { margin: 0 0 6px; }
.lesson-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 8px 0 6px; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.card { background: var(--panel); border: 1.5px solid var(--line); border-radius: 14px; padding: 12px 14px; cursor: pointer; display: grid; grid-template-columns: auto 1fr; gap: 0 12px; align-items: center; position: relative; }
.card:hover { border-color: var(--accent); }
.card.playing { background: var(--hl); }
.card .pic { font-size: 44px; grid-row: span 3; }
.card .en { font-weight: 700; font-size: 19px; }
.card .say { color: var(--accent); font-size: 15px; }
.card .de { color: var(--muted); font-size: 15px; }
.card .loop { position: absolute; top: 6px; right: 6px; font-size: 13px; padding: 2px 6px; opacity: .5; }
.card:hover .loop, .card .loop.on { opacity: 1; }
body:not(.show-say) .say { display: none; }
body:not(.show-de) .de { display: none; }

.line { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; padding: 9px 12px; border-radius: 10px; margin: 0 -12px; }
.line:hover { background: var(--panel); }
.line.playing { background: var(--hl); }
.line.your-turn { background: var(--accent-soft); outline: 2px dashed var(--accent); }
.line .en { font-size: 20px; }
.speaker { font-weight: 700; margin-right: 6px; }
.speaker.Mann { color: var(--he); } .speaker.Frau { color: var(--she); } .speaker.other { color: var(--other); }
.line .de { font-size: 16px; }
.actions { grid-row: 1 / span 2; grid-column: 2; display: flex; gap: 5px; align-items: start; }
.actions button { padding: 4px 10px; font-size: 15px; }
.actions button.on, .card .loop.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.stage { color: var(--muted); font-style: italic; font-size: 16px; margin: 10px 0; }
em.sd { color: var(--muted); font-size: .85em; }
.w { cursor: pointer; border-radius: 4px; }
.w:hover { background: var(--hl); }

.box { border-radius: 12px; padding: 12px 20px; margin: 18px 0; font-size: 17px; border: 1.5px solid; }
.box.brain { background: var(--b-brain); border-color: var(--b-brain-l); }
.box.say { background: var(--b-say); border-color: var(--b-say-l); }
.box.tip { background: var(--b-tip); border-color: var(--b-tip-l); }
.box.sos { background: var(--b-sos); border-color: var(--b-sos-l); }
.box h4 { margin: 0 0 6px; font-size: 18px; }
.box ul { margin: 4px 0; padding-left: 22px; }
.box p { margin: 4px 0; }

.sentence { display: grid; grid-template-columns: 1fr auto; gap: 0 12px; padding: 12px 14px; background: var(--panel); border: 1.5px solid var(--line); border-radius: 12px; margin: 8px 0; }
.sentence.playing { background: var(--hl); }
.sentence .en { font-size: 21px; font-weight: 600; }
.sentence .say { color: var(--accent); font-size: 16px; }
.sentence .de { font-size: 16px; color: var(--muted); }

.exercise { background: var(--panel); border: 1.5px solid var(--line); border-radius: 12px; padding: 12px 16px; margin: 10px 0; }
.exercise .answer { display: none; color: var(--ok); font-size: 18px; margin-top: 8px; font-weight: 600; }
.exercise.open .answer { display: block; }
.footer-actions { display: flex; gap: 12px; align-items: center; margin-top: 34px; padding-top: 18px; border-top: 1px solid var(--line); flex-wrap: wrap; }

table { border-collapse: collapse; width: 100%; font-size: 16px; margin: 8px 0 18px; }
th { background: var(--accent); color: #fff; text-align: left; font-weight: 600; }
th, td { padding: 7px 10px; border: 1px solid var(--line); vertical-align: top; }
tr:nth-child(even) td { background: var(--panel); }
td button { padding: 1px 8px; font-size: 13px; margin-right: 6px; }

/* flashcards */
.fc-wrap { max-width: 560px; margin: 20px auto; text-align: center; }
.fc { background: var(--panel); border: 2px solid var(--line); border-radius: 18px; padding: 30px 24px; min-height: 260px; display: flex; flex-direction: column; justify-content: center; gap: 10px; }
.fc .pic { font-size: 72px; }
.fc .q { font-size: 26px; font-weight: 600; }
.fc .a { font-size: 28px; font-weight: 700; color: var(--accent); }
.fc .say { font-size: 18px; color: var(--accent); }
.fc-buttons { display: flex; gap: 14px; justify-content: center; margin-top: 18px; flex-wrap: wrap; }
.fc-buttons .no { background: var(--no); border-color: var(--no); color: #fff; }
.fc-buttons .yes { background: var(--ok); border-color: var(--ok); color: #fff; }
.fc-stats { color: var(--muted); font-size: 15px; margin-top: 12px; }
.boxes { display: flex; gap: 8px; justify-content: center; margin: 10px 0 0; }
.boxes span { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 4px 10px; font-size: 14px; }
select { font: inherit; font-size: 16px; padding: 6px 10px; border-radius: 9px; border: 1.5px solid var(--line); background: var(--panel); color: var(--ink); }

.pod { background: var(--panel); border: 1.5px solid var(--line); border-radius: 12px; padding: 12px 16px; margin: 10px 0; }
.pod audio { width: 100%; margin-top: 6px; }
.pod .kind { font-size: 14px; color: var(--muted); }

.pop { position: absolute; z-index: 20; display: flex; gap: 5px; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 6px; box-shadow: 0 6px 20px rgba(0,0,0,.15); }
.hidden { display: none !important; }
#nowPlaying { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--bg); padding: 10px 12px 10px 20px; border-radius: 30px; display: flex; gap: 14px; align-items: center; font-size: 17px; z-index: 30; max-width: 92vw; }
#nowPlaying button { background: var(--bg); color: var(--ink); border: none; border-radius: 20px; }
#nowPlaying.turn { background: var(--accent); color: #fff; }

@media (max-width: 820px) {
  #sidebar { position: fixed; left: 0; z-index: 40; transform: translateX(-100%); transition: transform .2s; }
  body.menu-open #sidebar { transform: none; }
  #menuBtn { display: block; }
  #toolbar { padding: 8px 16px; }
  #content { padding: 16px 16px 140px; }
  .pics { font-size: 48px; }
}