/* Reader, Notes and Quiz pages: own header, no tab bar. Colours from tokens.css. */
.rd { min-height: 100vh; background: var(--bg); color: var(--ink); }
.rd-head { position: fixed; top: 0; left: 0; right: 0; z-index: 20; height: 60px; display: flex; align-items: center; gap: 10px; padding: 0 10px; background: var(--hdr); border-bottom: 1px solid var(--hdr-line); backdrop-filter: blur(8px); }
.rd-title { flex: 1; min-width: 0; }
.rd-title .k { font: 700 11px var(--ui); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rd-title .t { font: 600 17px/1.2 var(--serif); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rd-main { max-width: 720px; margin: 0 auto; padding: 76px 16px 80px; }
.rd-main h1 { font: 700 30px/1.15 var(--serif); margin: 8px 0 14px; }
.rd-main h2 { font: 700 21px/1.25 var(--serif); margin: 26px 0 10px; }
.rd-main h3 { font: 700 17px/1.3 var(--serif); margin: 16px 0 8px; }
.rd-main .kick { font: 700 12px var(--ui); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.rd-main .lede { font: 400 17px/1.55 var(--serif); color: var(--soft); margin: 0 0 14px; }
.rd-main .orig { font: 400 17px/1.65 var(--serif); }
.rd-main .orig p, .rd-main .nb p { margin: 0 0 12px; }
.rd-main .orig figure { margin: 14px 0; } .rd-main .orig img { max-width: 100%; height: auto; border-radius: 6px; }
.rd-main .nb ul { margin: 0; padding-left: 20px; } .rd-main .nb li { margin: 6px 0; font: 400 16px/1.55 var(--ui); }
.rd-card { margin: 10px 0; border-radius: 12px; background: var(--card); border: 1px solid var(--line); overflow: hidden; }
.rd-part { width: 100%; display: block; padding: 14px 16px; border: 0; background: transparent; color: var(--ink); text-align: left; cursor: pointer; font: inherit; }
.rd-part .pt { display: flex; align-items: center; justify-content: space-between; gap: 10px; font: 600 17px/1.3 var(--serif); }
.rd-part .ps { margin-top: 4px; font: 400 13px var(--ui); color: var(--muted); }
.rd-part[aria-expanded="true"] svg, .rd-part[aria-pressed="true"] { color: var(--accent); }
.rd-part[aria-expanded="true"] .pt svg { transform: rotate(180deg); }
.rd-sec { padding: 0 16px 8px; border-top: 1px solid var(--line); }
.rd-sec a { display: flex; flex-direction: column; min-height: 48px; justify-content: center; padding: 6px 0; color: var(--ink); text-decoration: none; font: 500 15px var(--ui); border-top: 1px solid var(--line); }
.rd-sec a:first-child { border-top: 0; color: var(--accent); font-weight: 700; }
.rd-sec a small { color: var(--muted); font-size: 12.5px; margin-top: 2px; }
.rd-slot { margin: 16px 0; padding: 14px 16px; border-radius: 12px; background: var(--card); border: 1px solid var(--line); }
.rd-slot.notes { border-left: 3px solid var(--accent); }
.rd-slot h3 { margin-top: 0; }
.idea { margin: 8px 0; border: 1px solid var(--line); border-radius: 10px; background: var(--card2); padding: 0 12px; }
.idea summary { min-height: 48px; display: flex; align-items: center; font: 600 15.5px var(--ui); cursor: pointer; }
.idea .blk { margin: 8px 0; } .idea .blk b { font: 700 12px var(--ui); letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }
.idea .blk p { margin: 3px 0 0; font: 400 15px/1.5 var(--ui); } .idea pre { overflow-x: auto; padding: 10px; border-radius: 8px; background: var(--bg); font-size: 13px; }
.idea .rule { font-weight: 600; }
.rd-next { display: flex; align-items: center; justify-content: center; margin-top: 28px; text-align: center; text-decoration: none; padding: 0 16px; }
.rd-listhead { display: flex; align-items: center; justify-content: space-between; }
.field-row { display: flex; align-items: center; justify-content: space-between; padding: 6px 16px; }
.rd-card.open > .lbl, .rd-card.open > .chips, .rd-card.open > .note, .rd-card.open > .btn-fill, .rd-card.open > .big { margin-left: 16px; margin-right: 16px; }
.rd-card.open > .btn-fill { width: calc(100% - 32px); margin-top: 8px; }
.rd-card.open > .btn-line { margin: 0 16px 16px; }
.rd-card .big { font: 700 34px var(--serif); margin-top: 6px; }
/* questions */
.deck .deckhead { display: flex; justify-content: flex-end; }
.qbar { height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; margin: 6px 0 10px; } .qbar i { display: block; height: 100%; background: var(--accent); }
.decknav { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; } .decknav .btn-line { flex: 0 0 auto; min-height: 44px; padding: 0 14px; }
.qcount { flex: 1; text-align: center; font: 400 12px var(--ui); color: var(--muted); } .qcount b { display: block; font: 700 14px var(--ui); color: var(--ink); }
.qsegs { display: flex; gap: 3px; margin: 6px 0 12px; } .qsegs i { flex: 1; height: 4px; border-radius: 2px; background: var(--line); }
.qsegs i.current { background: var(--faint); } .qsegs i.done { background: var(--ok); } .qsegs i.wrong { background: var(--bad); }
.qchap { font: 600 13px var(--ui); color: var(--muted); margin-bottom: 8px; }
.qcard { padding: 16px; border-radius: 14px; background: var(--card); border: 1px solid var(--line); }
.qrole { display: inline-block; padding: 3px 10px; border-radius: 12px; background: var(--card2); font: 700 11.5px var(--ui); letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }
.qt { margin: 12px 0; font: 600 19px/1.4 var(--serif); }
.qarea { display: flex; flex-direction: column; gap: 8px; }
.opt { display: flex; align-items: center; gap: 12px; min-height: 52px; padding: 8px 12px; border-radius: 10px; border: 1.5px solid var(--line2); background: transparent; color: var(--ink); text-align: left; font: 500 15.5px/1.35 var(--ui); cursor: pointer; }
.opt .mk { flex: 0 0 28px; height: 28px; border-radius: 14px; display: flex; align-items: center; justify-content: center; background: var(--card2); font: 700 13px var(--ui); }
.opt[aria-pressed="true"] { border-color: var(--accent); } .opt.right { border-color: var(--ok); background: var(--ok-bg); } .opt.wrong { border-color: var(--bad); background: var(--bad-bg); }
.opt:disabled { opacity: 1; cursor: default; }
.pairrow { display: flex; align-items: center; justify-content: space-between; gap: 10px; } .pairrow select { max-width: 55%; min-height: 44px; }
.grade { display: flex; gap: 8px; } .answer { padding: 12px; border-radius: 10px; background: var(--card2); }
.fb { margin-top: 12px; padding: 12px; border-radius: 10px; font: 400 15px/1.45 var(--ui); } .fb.got { background: var(--ok-bg); } .fb.part { background: var(--warn-bg); } .fb.miss { background: var(--bad-bg); }
.flagbar { margin-top: 12px; font: 400 13px var(--ui); color: var(--muted); } .flagbar summary { min-height: 40px; display: flex; align-items: center; cursor: pointer; }
.flagnote { margin: 6px 0 0; }
.decknav .btn-line, .grade .btn-line { width: auto; flex: 0 0 auto; padding: 0 16px; } .grade .btn-line { flex: 1; }