@import url('https://cdn.jsdelivr.net/gh/rastikerdar/sahel-font@v3.4.0/dist/font-face.css');
:root{color-scheme:light;--paper:#f5f1e9;--paper-deep:#e8e0d3;--ink:#242824;--muted:#77796f;--sage:#7b927b;--sage-dark:#4c684f;--rust:#bd684b;--line:#d7d0c4;--white:#fffdf9;--source-bg:#d8d0c3;--text-soft:#53564f;--success-bg:#f0f4ed;--danger-bg:#f8e8e0;--progress-empty:#d8d3c9;--hover-bg:#edf2e9;--shadow:0 16px 40px rgba(48,43,33,.08)}

*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Sahel,Tahoma,sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}.topbar{height:76px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 clamp(20px,5vw,72px);background:color-mix(in srgb,var(--paper) 92%,transparent);position:sticky;top:0;z-index:5;backdrop-filter:blur(14px)}.topbar-actions{display:flex;align-items:center;gap:20px}.theme-toggle{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:999px;background:var(--paper-deep);color:var(--ink);padding:5px 10px;font-size:.72rem;line-height:1.3}.theme-toggle:hover{border-color:var(--sage);color:var(--sage-dark)}.theme-icon{font-size:1rem;line-height:1}.wordmark{font-weight:900;font-size:1.3rem;letter-spacing:-.04em}.wordmark span{font-size:.7rem;color:var(--muted);font-weight:400;direction:ltr;display:inline-block;margin-right:5px}.topbar nav{display:flex;gap:22px;align-items:center;font-size:.9rem}.topbar nav a:hover,.text-link:hover{color:var(--rust)}.link-button{border:0;background:none;color:var(--muted);padding:0}.shell{max-width:1240px;margin:0 auto;padding:44px clamp(20px,4vw,60px) 80px}.hero{display:grid;grid-template-columns:1fr 280px;gap:44px;align-items:end;padding:36px 0 46px}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.7rem;color:var(--sage-dark);font-weight:800;margin:0 0 8px}.hero h1,.section-heading h1,.section-heading h2,.review-header h1,.auth-card h1{font-size:clamp(1.9rem,4vw,3.5rem);line-height:1.2;letter-spacing:-.06em;margin:.1em 0 .25em}.lede{color:var(--muted);max-width:600px;font-size:1.05rem}.hero-note{border-right:3px solid var(--rust);padding:10px 20px;color:var(--muted);font-size:.87rem}.hero-note strong{color:var(--ink);font-size:1rem}.stats{display:flex;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:0 0 50px}.stats div{padding:19px 30px 19px 50px;border-left:1px solid var(--line);min-width:160px}.stats div:first-child{padding-right:0}.stats strong{font-size:1.7rem;display:block;line-height:1.2}.stats span{font-size:.75rem;color:var(--muted)}.section-heading{display:flex;justify-content:space-between;align-items:end;margin-bottom:24px}.section-heading h2{font-size:1.8rem}.book-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}.book-card,.panel,.question-card,.answer-card,.auth-card,.empty-state{background:var(--white);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:5px}.book-card{padding:24px;min-height:220px;display:flex;flex-direction:column}.book-index{color:var(--rust);font-size:.8rem;font-weight:800}.book-card h3{font-size:1.2rem;margin:18px 0 3px;line-height:1.5}.book-card p{color:var(--muted);font-size:.8rem;margin:0}.card-actions{display:flex;flex-wrap:wrap;align-items:center;gap:15px;margin-top:auto}.card-actions form{flex-basis:100%;margin:0}.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:4px;padding:9px 17px;font-weight:700;font-size:.82rem;transition:transform .15s,box-shadow .15s}.button:hover{transform:translateY(-1px);box-shadow:0 7px 15px rgba(50,45,35,.12)}.button.primary{background:var(--ink);color:var(--white)}.button.accent{background:var(--rust);color:#fff}.button.secondary{background:var(--paper-deep)}.button.full{width:100%}.text-link,.back-link{font-size:.8rem;color:var(--sage-dark)}.review-start{display:flex;gap:10px;align-items:end}.review-start label,.stack label,.range-form label{display:grid;gap:5px;font-size:.75rem;color:var(--muted)}select,input{background:var(--paper);border:1px solid var(--line);border-radius:3px;padding:9px 10px;color:var(--ink)}.reader-toolbar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:18px}.reader-grid{display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:22px;align-items:start}.source-pane{background:var(--source-bg);padding:22px;min-height:70vh}.source-page{display:block;width:100%;height:auto;box-shadow:0 10px 30px rgba(0,0,0,.18);background:#fff}.page-rail{display:flex;justify-content:space-between;align-items:center;font-size:.75rem;color:var(--muted);margin-bottom:15px}.side-pane{background:var(--white);border:1px solid var(--line);padding:24px;min-height:400px;position:sticky;top:96px}.side-status{font-size:.75rem;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:24px}.side-status.is-open{color:var(--sage-dark)}.content-block{border-bottom:1px solid var(--line);padding:11px 0}.content-block summary{cursor:pointer;font-weight:700;font-size:.86rem}.markdown{white-space:pre-wrap;color:var(--text-soft);font-size:.84rem;padding-top:10px}.metric{font-size:2.4rem;line-height:1;margin:5px 0 20px}.metric span{font-size:.75rem;color:var(--muted)}.side-divider{height:28px}.locked-box{border:1px dashed var(--sage);padding:20px;margin-top:25px}.locked-box h3{margin-top:0}.range-layout{display:grid;grid-template-columns:1fr 1fr;gap:22px}.panel{padding:25px}.range-form{display:grid;grid-template-columns:1fr 1fr;gap:17px;align-content:start}.range-form .preview{grid-column:1/-1;background:var(--paper);padding:13px;font-size:.8rem}.range-form button{grid-column:1/-1}.range-row{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding:12px 0;font-size:.86rem}.icon-button{border:0;background:none;color:var(--rust);font-size:1.2rem}.review-header{display:flex;justify-content:space-between;align-items:end;margin-bottom:25px}.timer{font-variant-numeric:tabular-nums;font-size:1.5rem;color:var(--rust);direction:ltr}.question-card,.answer-card,.empty-state{max-width:780px;margin:30px auto;padding:clamp(23px,5vw,52px)}.question-card h2{font-size:1.35rem;line-height:1.8;margin-top:0}.options{display:grid;gap:10px;margin:25px 0}.option{display:flex;align-items:flex-start;gap:11px;padding:13px 15px;border:1px solid var(--line);border-radius:4px;cursor:pointer;transition:border-color .15s,background .15s}.option:has(input:checked){border-color:var(--sage);background:var(--success-bg)}.option input{margin-top:7px;accent-color:var(--sage-dark)}.option-key{font-size:.7rem;color:var(--sage-dark);font-weight:800;direction:ltr}.guess-toggle{display:flex;align-items:center;gap:8px;font-size:.8rem;color:var(--muted);margin-bottom:22px}.guess-toggle small{font-size:.68rem;margin-right:auto}.answer-card.correct{border-top:5px solid var(--sage)}.answer-card.wrong{border-top:5px solid var(--rust)}.answer-stem{font-weight:700}.explanation{white-space:pre-wrap;background:var(--paper);padding:18px;margin:20px 0;font-size:.88rem}.auth-card{max-width:470px;margin:80px auto;padding:38px}.stack{display:grid;gap:18px;margin-top:28px}.error{color:var(--rust);background:var(--danger-bg);padding:10px;font-size:.82rem}.muted{color:var(--muted)}.empty-state{text-align:center}.mastery-list{display:grid;gap:10px}.mastery-row{display:grid;grid-template-columns:2fr 3fr auto;gap:20px;align-items:center;background:var(--white);border:1px solid var(--line);padding:15px 20px}.mastery-row small{display:block;color:var(--muted);font-size:.7rem}.progress{height:8px;background:var(--paper-deep);border-radius:20px;overflow:hidden}.progress span{display:block;height:100%;background:var(--sage)}
@media(max-width:800px){.hero{grid-template-columns:1fr;gap:14px}.hero-note{border-right:0;border-top:2px solid var(--rust);padding:14px 0}.stats{overflow:auto}.stats div{padding:15px 22px;min-width:130px}.reader-grid,.range-layout{grid-template-columns:1fr}.side-pane{position:static}.reader-toolbar{flex-wrap:wrap}.reader-toolbar>div{order:-1;width:100%}.review-start{align-items:stretch;flex-direction:column}.section-heading{align-items:start;flex-direction:column}.mastery-row{grid-template-columns:1fr auto}.mastery-row .progress{grid-column:1/-1;grid-row:2}.topbar nav{gap:10px;font-size:.75rem}.shell{padding-top:25px}}
:root{--topbar-bg:rgba(245,241,233,.92)}.topbar{background:var(--topbar-bg)}


/* One clear primary action per book; review and range management stay secondary. */
.book-card{padding:24px;gap:4px;border-radius:12px}
.book-card .card-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:24px}
.card-actions .book-read{grid-column:1/-1;justify-content:space-between;padding:12px 16px}
.card-actions form{margin:0;min-width:0}
.card-actions form .button{width:100%;padding:9px 8px}
.card-actions .book-ranges{text-align:center;font-size:.73rem}
.button.secondary{color:var(--ink);border:1px solid var(--line)}
button:disabled{cursor:default;opacity:.5;transform:none!important;box-shadow:none!important}
button:focus-visible,a:focus-visible,summary:focus-visible,textarea:focus-visible{outline:2px solid var(--sage);outline-offset:3px}
.personal-note{margin:18px 0;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--paper)}
.personal-note summary{cursor:pointer;font-size:.8rem;font-weight:700;color:var(--sage-dark)}
.personal-note label{display:block;color:var(--muted);font-size:.7rem;margin-top:12px}
.personal-note textarea{display:block;resize:vertical;width:100%;min-height:90px;max-height:50vh;margin-top:6px;padding:10px;font:inherit;font-size:.85rem;line-height:1.8;color:var(--ink);background:var(--white);border:1px solid var(--line);border-radius:5px}
.note-actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:8px}
.note-actions .button{padding:5px 9px;font-size:.7rem}
.note-status,.passage-status{font-size:.7rem}
.passage-tools{margin:8px 0 14px;font-size:.72rem;line-height:1.7}
.passage-hint{font-size:.68rem;margin:4px 0}
.passage-selection{display:flex;gap:6px;margin:8px 0}
.passage-selection .button{font-size:.72rem;padding:5px 10px}
[hidden]{display:none!important}
.passage-mark{background:#ffe998;color:#332b0b;border-radius:2px;padding:1px 0;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.passage-mark.is-bookmarked{background:#dce9ff;color:#1c3657;box-shadow:inset 0 -2px #7997d3}
.saved-passages{margin-top:8px;border-top:1px solid var(--line);padding-top:8px}
.saved-passages summary{font-size:.72rem;font-weight:500;cursor:pointer;color:var(--sage-dark)}
.saved-passages ul{list-style:none;padding:0;margin:8px 0;display:grid;gap:5px;max-height:240px;overflow:auto}
.saved-passages li{display:flex;align-items:start;gap:8px;padding:7px;background:var(--paper);border-radius:4px}
.saved-passage-jump{flex:1;text-align:start;overflow-wrap:anywhere;font-size:.75rem;color:var(--ink);background:none;border:0;padding:0;line-height:1.8;max-height:100px;overflow:auto}
.remove-passage{border:0;background:none;color:var(--rust);font-size:.7rem;padding:0}
.source-navigation{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:16px 0;font-size:.8rem}
.source-navigation .button{font-size:.75rem;padding:7px 12px}
.source-image-status{font-size:.8rem}
:root[data-theme="dark"]{color-scheme:dark;--paper:#0c101b;--paper-deep:#172136;--ink:#e5eefb;--muted:#9caec8;--sage:#41eed7;--sage-dark:#72f4df;--rust:#ff9b7b;--line:#293a55;--white:#121b2b;--source-bg:#0a1020;--text-soft:#c5d4e8;--success-bg:#12352f;--danger-bg:#3c2330;--progress-empty:#27334a;--hover-bg:#19353c;--shadow:0 12px 36px rgba(0,0,0,.24);--topbar-bg:rgba(12,16,27,.94);--neon-violet:#b69aff}
:root[data-theme="dark"] body{background:radial-gradient(ellipse at 90% 0,rgba(118,81,245,.09),transparent 45%),var(--paper)}
:root[data-theme="dark"] .wordmark{color:var(--sage);text-shadow:0 0 20px rgba(65,238,215,.25)}
:root[data-theme="dark"] .topbar{border-bottom-color:#304560}
:root[data-theme="dark"] .button.primary{background:var(--sage);color:#071e24;box-shadow:0 0 18px rgba(65,238,215,.13)}
:root[data-theme="dark"] .button.accent{background:var(--neon-violet);color:#18112d}
:root[data-theme="dark"] .button.primary:hover{box-shadow:0 0 24px rgba(65,238,215,.28)}
:root[data-theme="dark"] .book-card:hover{border-color:#4e7784;box-shadow:0 0 22px rgba(65,238,215,.06)}
:root[data-theme="dark"] .book-index,:root[data-theme="dark"] .timer{color:var(--neon-violet)}
:root[data-theme="dark"] .answer-card.correct{box-shadow:0 -4px 24px rgba(65,238,215,.08)}
:root[data-theme="dark"] .progress-segment.is-unlocked,:root[data-theme="dark"] .legend-swatch.is-unlocked{background:var(--sage)}
:root[data-theme="dark"] .progress span{box-shadow:0 0 10px rgba(65,238,215,.3)}
:root[data-theme="dark"] .passage-mark{background:#4d4221;color:#fff2b8}
:root[data-theme="dark"] .passage-mark.is-bookmarked{background:#34305b;color:#ece2ff;box-shadow:inset 0 -2px var(--neon-violet)}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}