:root{--edition:#6425D8;--deep:#29105D;--light:#F2ECFE;--accent:#FF9D28}
:root{--ink:#24211d;--ink-soft:#61594d;--cream:#f7f4ee;--ivory:#fffdf8;--card:#fffefa;--gold:#b8914e;--gold-light:#edddbd;--gold-pale:#f5ead3;--line:#e7e0d5;--muted:#8c8476;--danger:#b4483e;--good:#478267;--sidebar:#24221d;--shadow:0 16px 45px rgba(58,45,26,.06);font-family:Inter,'Segoe UI',Arial,sans-serif;color:var(--ink);background:var(--cream);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible{outline:3px solid #d8ad5f;outline-offset:3px}a{color:inherit} .hidden{display:none!important}.shell{display:flex;min-height:100vh}.sidebar{width:267px;position:fixed;inset:0 auto 0 0;background:var(--sidebar);color:#ece8df;display:flex;flex-direction:column;z-index:30;padding:30px 16px 20px;overflow:auto}.brand{display:flex;gap:12px;align-items:center;padding:4px 10px 35px}.brand-mark{border:1px solid #736047;background:#38332a;width:47px;height:47px;border-radius:13px;display:grid;place-items:center;color:#f5ebd9;flex-shrink:0}.brand-mark svg{width:35px}.brand-title{font-weight:800;font-size:19px;letter-spacing:-1px;white-space:nowrap}.brand-title span{color:#d5ae6a}.brand-sub{font-size:8px;letter-spacing:1.6px;color:#b3a48e;margin-top:5px}.side-heading{font-size:10px;letter-spacing:1.8px;color:#9c9589;margin:4px 14px 12px;font-weight:700}.side-heading--lower{margin-top:30px}.nav{display:flex;flex-direction:column;gap:5px}.nav-link{position:relative;width:100%;border:0;background:transparent;color:#c6c1b9;text-align:left;padding:13px 13px;display:flex;align-items:center;gap:13px;border-radius:10px;font-size:13px;font-weight:570}.nav-link:hover{background:#353127;color:#fff}.nav-link.active{background:#d7b979;color:#24201a;font-weight:750}.nav-icon{font-size:19px;width:19px;text-align:center;line-height:1;flex-shrink:0}.nav-badge{margin-left:auto;font-size:11px;opacity:.7}.tiny-lock{margin-left:auto;color:#d8b46c}.side-spacer{flex:1;min-height:24px}.sidebar-promo{background:linear-gradient(139deg,#51402c 0%,#352d24 82%);border:1px solid #675137;padding:19px;border-radius:15px}.promo-star{color:#ecc780;font-size:24px;margin-bottom:10px}.sidebar-promo strong{font-size:14px}.sidebar-promo p{font-size:12px;color:#d4c6ac;line-height:1.6;margin:9px 0 15px}.sidebar-promo button{border:0;background:#dfbd80;color:#292218;font-size:12px;font-weight:750;border-radius:9px;width:100%;padding:12px}.sidebar-promo button span{float:right}.side-foot{font-size:10px;color:#8d877b;line-height:1.8;text-align:center;margin-top:22px}.main-area{margin-left:267px;min-width:0;flex:1;display:flex;flex-direction:column}.topbar{height:83px;display:flex;justify-content:space-between;align-items:center;padding:0 40px;border-bottom:1px solid var(--line);background:rgba(255,253,249,.86)}.topbar-left,.topbar-actions{display:flex;align-items:center;gap:18px}.breadcrumb{font-size:10px;font-weight:750;letter-spacing:1.5px;color:#aaa092}.breadcrumb span{margin:0 9px;color:#cfc7bb}.breadcrumb strong{font-size:12px;color:#4d463c;letter-spacing:0}.edition{background:#eee3cb;color:#8b6c3b;border-radius:100px;font-size:10px;letter-spacing:.6px;padding:9px 13px;font-weight:800}.profile-pill{border:1px solid var(--line);border-radius:999px;background:var(--ivory);padding:6px 11px 6px 6px;display:flex;gap:10px;align-items:center;font-weight:650;font-size:12px}.avatar{background:#e8d5ae;color:#674c25;border-radius:50%;width:30px;height:30px;display:grid;place-items:center;font-size:13px;font-weight:800}.chevron{color:#9a9184}.hamburger{display:none;border:0;background:transparent;font-size:24px}.page{max-width:1370px;width:100%;padding:35px 40px 60px;margin:0 auto;flex:1}.eyebrow{font-size:11px;font-weight:850;letter-spacing:2px;color:#a4824e;text-transform:uppercase}.page-title{font-size:clamp(27px,3vw,34px);letter-spacing:-1.5px;margin:10px 0 6px;line-height:1.17}.subtitle{font-size:14px;line-height:1.7;color:var(--muted);margin:0}.section-title{font-size:19px;letter-spacing:-.6px;margin:0}.section-sub{font-size:12px;color:var(--muted);margin:7px 0 0}.flex-between{display:flex;justify-content:space-between;align-items:center;gap:16px}.hero{background:linear-gradient(102deg,#2b2923 0%,#383228 52%,#685033 100%);color:white;border-radius:20px;padding:37px 39px;position:relative;overflow:hidden;min-height:235px;display:flex;align-items:center;box-shadow:var(--shadow)}.hero-text{position:relative;z-index:2;max-width:530px}.hero-kicker{font-size:10px;letter-spacing:2px;color:#dfbd80;font-weight:850}.hero h1{font-size:clamp(28px,3.2vw,41px);letter-spacing:-1.5px;line-height:1.17;margin:13px 0}.hero h1 em{font-style:normal;color:#e7c88c}.hero p{color:#ddd1be;font-size:13px;line-height:1.7;max-width:435px}.hero-curve{position:absolute;right:38px;top:5px;width:35%;height:105%;opacity:.31}.hero .button-primary{background:#e6c68b;color:#29231a;margin-top:13px}.button-primary,.button-outline,.button-dark,.button-ghost{border-radius:10px;padding:12px 18px;font-size:12px;font-weight:800;border:0;display:inline-flex;align-items:center;justify-content:center;gap:9px}.button-primary{background:#b89252;color:white}.button-primary:hover{filter:brightness(.95)}.button-outline{border:1px solid #d4c8b5;color:#5a4c37;background:#fffefa}.button-dark{background:var(--ink);color:white}.button-ghost{background:transparent;color:#8c7045}.btn-small{padding:9px 13px}.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px;margin-top:24px}.stat-card{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:20px;display:flex;flex-direction:column;gap:10px;min-height:120px}.stat-icon{font-size:20px;color:#b28a4b}.stat-caption{font-size:11px;color:var(--muted);font-weight:650}.stat-number{font-size:27px;letter-spacing:-1px;font-weight:850}.stat-small{font-size:11px;color:#a28555}.section{margin-top:35px}.paper-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px;margin-top:18px}.paper-card{display:flex;gap:20px;align-items:center;background:#fffefa;border:1px solid var(--line);border-radius:16px;padding:23px;box-shadow:var(--shadow);text-align:left;transition:transform .15s,border-color .15s}.paper-card:hover,.topic-card:hover{transform:translateY(-2px);border-color:#cdbb98}.paper-illustration{height:88px;width:89px;border-radius:13px;background:#ede0c4;display:grid;place-items:center;flex-shrink:0;color:#8c6b3a;font-family:Georgia,serif;font-weight:700;font-size:37px}.paper-illustration.dark{background:#ded8ca;color:#474039}.paper-card h3{font-size:16px;margin:0 0 7px}.paper-card p{font-size:12px;color:var(--muted);line-height:1.5;margin:0}.paper-card .paper-meta{color:#a17a40;font-weight:750;margin-top:12px;font-size:11px}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px;margin-top:18px}.topic-card{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:20px;display:flex;flex-direction:column;align-items:stretch;gap:12px;text-align:left;transition:transform .15s,border-color .15s;min-height:175px}.topic-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.topic-symbol{border-radius:11px;width:53px;height:48px;display:grid;place-items:center;background:#f0e5cc;color:#94703b;font-size:17px;font-family:Georgia,serif;font-weight:700}.topic-badge{background:#f6f0e6;color:#937748;border-radius:100px;padding:6px 9px;font-size:10px}.topic-card h3{font-size:14px;letter-spacing:-.15px;margin:0;line-height:1.4}.topic-foot{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:#9d9488;margin-top:auto}.topic-foot .arrow{color:#ae874a;font-size:18px}.premium-banner{display:flex;justify-content:space-between;align-items:center;gap:25px;background:#efe3cb;border:1px solid #e0d0b0;border-radius:17px;margin-top:33px;padding:20px 27px}.premium-banner .badge-icon{background:#e3ca91;border-radius:50%;width:50px;height:50px;display:grid;place-items:center;font-size:22px;flex-shrink:0}.premium-banner .flex-between{justify-content:flex-start}.premium-banner strong{font-size:14px}.premium-banner p{font-size:12px;color:#80715b;margin:5px 0 0;line-height:1.6}.searchbar{margin-top:26px;display:flex;gap:11px;flex-wrap:wrap}.searchbar input{flex:1;min-width:210px;border:1px solid var(--line);border-radius:10px;background:white;padding:14px 16px;color:var(--ink);font-size:13px}.pill-tabs{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.pill{border:1px solid var(--line);background:#fffdf9;color:#786f62;padding:10px 15px;border-radius:9px;font-size:11px;font-weight:800}.pill.active{background:#2b2721;color:#fff;border-color:#2b2721}.practice-layout{display:grid;grid-template-columns:minmax(0,1fr) 255px;gap:20px;margin-top:25px}.question-panel,.side-panel,.white-card{border:1px solid var(--line);border-radius:16px;background:#fffefa;padding:27px;box-shadow:var(--shadow)}.question-count{font-size:11px;letter-spacing:1.2px;color:#a0804b;font-weight:800}.question-prompt{font-size:20px;font-weight:720;line-height:1.6;letter-spacing:-.3px;margin:18px 0 22px}.option{width:100%;display:flex;align-items:center;gap:13px;border:1px solid #e4dccc;background:white;border-radius:11px;padding:14px;text-align:left;font-size:14px;margin-top:10px;color:#39332c}.option-key{border:1px solid #ded4c5;background:#faf7f1;width:31px;height:31px;border-radius:8px;display:grid;place-items:center;font-size:11px;font-weight:750;flex-shrink:0}.option.selected{border-color:#bd9754;background:#fcf6e8}.option.selected .option-key{background:#b89252;color:white;border-color:#b89252}.option.correct{border-color:#71a184;background:#eef9f1}.option.incorrect{border-color:#d99996;background:#fff4f3}.option:disabled{cursor:default}.question-actions{margin-top:22px;display:flex;gap:10px;flex-wrap:wrap}.feedback{border:1px solid #d5e9d9;background:#f0f8ef;color:#467554;padding:14px;border-radius:11px;font-size:13px;margin-top:15px;line-height:1.5}.feedback.bad{border-color:#f0d8d5;background:#fff6f4;color:#ac5650}.lock-box{background:#faf7f0;border:1px dashed #cfc0a5;border-radius:12px;padding:20px;text-align:center}.lock-box .lock-glyph{font-size:28px;color:#ac8a55;margin-bottom:10px}.lock-box h3{font-size:14px;margin:4px 0 8px}.lock-box p{font-size:12px;color:#807362;line-height:1.6}.side-panel h3{font-size:15px;margin:0 0 12px}.side-panel p{font-size:12px;line-height:1.65;color:#8f8475}.progress-track{background:#eae2d5;height:8px;border-radius:50px;overflow:hidden}.progress-fill{height:100%;background:#c69c57;border-radius:50px}.panel-row{display:flex;justify-content:space-between;align-items:center;font-size:12px;margin:9px 0 12px;color:#887a65}.mock-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:19px;margin-top:28px}.mock-card{background:#fffefa;border:1px solid var(--line);border-radius:18px;padding:28px}.mock-card .paper-illustration{margin-bottom:22px}.mock-card h3{margin:0 0 9px;font-size:18px}.mock-card p{font-size:13px;color:var(--muted);line-height:1.6}.mock-meta{display:flex;gap:9px;margin:18px 0}.chip{background:#f5efe4;color:#8d7249;padding:7px 10px;border-radius:100px;font-size:10px;font-weight:750}.price-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;margin-top:28px;align-items:start}.pricing-card{background:#29251e;color:#fff;border-radius:20px;padding:34px;position:relative;overflow:hidden}.pricing-card::before{content:'';width:220px;height:220px;border:2px solid #9d7c48;border-radius:50%;position:absolute;right:-60px;top:-90px;opacity:.23}.pricing-card .price{font-size:52px;letter-spacing:-2px;font-weight:900;margin:14px 0 0}.pricing-card .price small{font-size:14px;letter-spacing:0;color:#cfc3ae;font-weight:500}.pricing-card .features{list-style:none;padding:8px 0 0;margin:22px 0;border-top:1px solid #554b3e}.pricing-card li{font-size:13px;padding-top:17px;color:#e6ded0}.pricing-card li::before{content:'✓';color:#dfc187;margin-right:11px;font-weight:800}.pricing-card button{width:100%;margin-top:27px;background:#e6c68b;color:#282119}.fineprint{font-size:11px;color:#bdb1a0;line-height:1.5}.feature-list{display:grid;gap:17px}.feature-point{display:flex;gap:12px}.feature-point .circle{width:37px;height:37px;background:#eee2c9;border-radius:11px;display:grid;place-items:center;color:#856631;flex-shrink:0}.feature-point strong{display:block;font-size:13px;margin-top:2px}.feature-point p{font-size:12px;color:var(--muted);line-height:1.6;margin:5px 0 0}.progress-list{margin-top:24px;display:grid;gap:13px}.progress-item{border:1px solid var(--line);background:white;border-radius:12px;padding:15px 18px;display:grid;grid-template-columns: minmax(150px,1.5fr) minmax(100px,1fr) 70px;align-items:center;gap:20px}.progress-item strong{font-size:12px}.progress-item p{font-size:11px;color:var(--muted);margin:5px 0 0}.progress-item .right{text-align:right;color:#9a7843;font-weight:800;font-size:12px}.footer{border-top:1px solid var(--line);padding:19px 40px;display:flex;justify-content:space-between;gap:12px;font-size:10px;color:#aaa094}.empty{border:1px dashed #cfbfaa;padding:32px;border-radius:15px;text-align:center;color:#8c7b61;margin-top:20px}.modal-backdrop{position:fixed;inset:0;background:rgba(23,20,16,.58);z-index:90;display:grid;place-items:center;padding:18px}.modal{width:min(100%,430px);background:var(--ivory);border-radius:20px;padding:30px;box-shadow:0 24px 90px #0004;position:relative}.modal h2{font-size:23px;margin:8px 0 10px}.modal p{font-size:13px;color:var(--muted);line-height:1.6}.modal label{font-size:12px;font-weight:750;display:block;margin-top:17px}.modal input{width:100%;border:1px solid var(--line);border-radius:9px;background:white;padding:12px;margin-top:7px;font-size:13px}.modal .button-primary{width:100%;margin-top:20px}.modal-close{position:absolute;right:20px;top:17px;background:transparent;border:0;font-size:25px;color:#8f8679}.toast{position:fixed;z-index:100;bottom:22px;right:22px;background:#27231d;color:#f7edd9;border:1px solid #6a5737;padding:15px 21px;border-radius:12px;max-width:360px;box-shadow:0 14px 45px #0003;font-size:12px;line-height:1.6}.notice{display:inline-flex;align-items:center;gap:7px;color:#987140;background:#f7ead3;border:1px solid #ead9b7;border-radius:8px;padding:8px 10px;font-size:11px}.status-good{color:#458463}.scrim{display:none}.memo-box{position:relative;overflow:hidden;min-height:150px;border:1px solid #e1d5ba;background:#fff9eb;padding:24px;border-radius:12px;margin-top:17px}.memo-box pre{white-space:pre-wrap;line-height:1.8;position:relative;z-index:2;font-size:13px;color:#373129;font-family:inherit}.memo-watermark{pointer-events:none;position:absolute;inset:0;display:flex;align-items:center;justify-content:center;transform:rotate(-18deg);font-weight:900;letter-spacing:2px;font-size:20px;opacity:.075;user-select:none}.demo-flag{margin-top:16px;background:#f9eed7;border:1px solid #ead9b7;padding:12px;border-radius:9px;font-size:11px;line-height:1.5;color:#8b6938}
@media(max-width:1200px){.page{padding-left:26px;padding-right:26px}.topbar{padding:0 26px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:920px){.sidebar{transform:translateX(-105%);transition:transform .22s ease}.sidebar.open{transform:translateX(0)}.scrim:not(.hidden){display:block;position:fixed;inset:0;background:#0008;z-index:24}.main-area{margin-left:0}.hamburger{display:block}.hero-curve{opacity:.19}.footer{padding:18px 26px}}@media(max-width:660px){.page{padding:22px 16px 38px}.topbar{height:70px;padding:0 16px}.topbar-left{gap:11px}.edition{display:none}.breadcrumb{font-size:9px;letter-spacing:1px}.profile-pill{font-size:0;padding:5px}.profile-pill .avatar{width:32px;height:32px;font-size:13px}.chevron{display:none}.hero{padding:26px 22px;min-height:235px}.hero-curve{right:-65px;width:70%}.hero h1{font-size:31px}.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.stat-card{padding:15px;min-height:115px}.stat-number{font-size:24px}.paper-grid,.mock-grid,.price-layout,.practice-layout{grid-template-columns:1fr}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.topic-card{padding:15px;min-height:173px}.topic-symbol{height:43px;width:46px}.topic-card h3{font-size:12px}.paper-card{padding:17px;gap:13px}.paper-illustration{height:70px;width:70px;font-size:30px}.premium-banner{flex-direction:column;align-items:stretch;padding:19px}.premium-banner .button-dark{width:100%}.footer{flex-direction:column;text-align:center;font-size:9px}.question-panel,.side-panel{padding:18px}.question-prompt{font-size:19px}.progress-item{gap:10px;grid-template-columns:1.7fr 1fr 40px}.progress-item strong{font-size:11px}.progress-item .right{font-size:11px}}@media(max-width:380px){.topic-grid{grid-template-columns:1fr}.brand-title{font-size:18px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* v0.2 — study feedback and revision actions */
.review-block{margin-top:22px;padding:21px;border:1px solid #e6d7ba;background:#fff9ed;border-radius:13px}
.review-block h3{font-size:15px;letter-spacing:-.3px;margin:0 0 8px}
.review-block p{font-size:12px;color:#826d4d;line-height:1.6;margin:0 0 15px}
.review-list{display:flex;flex-wrap:wrap;gap:9px}
.review-list .button-outline{background:#fffefa}
@media(max-width:660px){.review-list{flex-direction:column}.review-list .button-outline{width:100%}}

/* Account-bound memo watermark: deterrence, not screenshot prevention. */
.memo-watermark{inset:-50px;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);gap:18px;place-items:center;transform:rotate(-19deg);opacity:.09;overflow:hidden;font-size:11px;letter-spacing:.35px;line-height:1.4;text-align:center;white-space:nowrap}
.memo-watermark span{min-width:150px}
.memo-owner{font-weight:700;color:#755d35!important;border-bottom:1px solid #e9dbc2;padding-bottom:10px}

/* v0.3 — exam library, study notes and admin upload workspace */
.resource-shortcuts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px;margin-top:20px}
.shortcut{border:1px solid #e6dccb;background:white;text-align:left;border-radius:14px;padding:18px;display:flex;gap:9px;flex-direction:column;min-height:125px;cursor:pointer;transition:box-shadow .2s,transform .2s}
.shortcut:hover,.resource-card:hover{box-shadow:0 12px 34px #45311013;transform:translateY(-2px)}
.shortcut span{font-size:27px;color:#b18b4b}.shortcut strong{font-size:13px;color:#27231e}.shortcut small{font-size:11px;color:#9b8c77}
.library-tabs{display:flex;gap:8px;margin:22px 0;flex-wrap:wrap}.region-cloud{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:18px}
.resource-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}
.resource-card{border:1px solid #e8dfce;border-radius:14px;background:#fff;padding:20px;box-shadow:0 3px 12px #3e2f1710;transition:box-shadow .2s, transform .2s}
.resource-card-top,.note-heading{display:flex;align-items:center;justify-content:space-between;gap:8px}
.paper-chip{background:#f1dfb7;border-radius:8px;font-size:11px;font-weight:850;letter-spacing:.3px;color:#73582b;padding:7px 10px}
.resource-card h3{font-size:16px;margin:14px 0 14px;color:#2a251e;line-height:1.35}
.resource-badges{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:17px}.resource-status{font-size:10px;font-weight:700;padding:6px 8px;border-radius:8px;background:#f5f1e9;color:#827865}
.resource-status.ok{color:#477052;background:#edf5ed}.resource-status.pending{color:#8b7760;background:#f5f1e9}
.resource-actions{display:flex;gap:9px;flex-wrap:wrap}.resource-actions .button-primary,.resource-actions .button-outline{font-size:11px;flex:1;min-width:130px;padding:11px 12px;white-space:normal;line-height:1.25}
.resource-card button:disabled{cursor:not-allowed;opacity:.52}.file-label{font-size:10px;color:#8e806f;margin-top:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.empty-state{background:#fff;border:1px dashed #d7c59e;border-radius:17px;padding:34px;text-align:center;margin:15px 0 22px}
.empty-state h3{margin:10px 0;color:#322b22}.empty-state p{line-height:1.65;color:#756a59;max-width:540px;margin:12px auto 21px;font-size:13px}
.library-policy{background:#f5eddc;border-radius:12px;margin:22px 0;padding:15px 18px;color:#6c573b;font-size:12px;line-height:1.7}
.note-index{display:flex;flex-wrap:wrap;gap:9px;margin:18px 0 23px}
.note-index-item{border:1px solid #e2d6c0;border-radius:10px;background:#fff;cursor:pointer;color:#634c2e;padding:10px 13px;font-size:12px;font-weight:700;text-align:left}
.note-index-item:hover{background:#f5e8cf}
.notes-layout{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px;align-items:start}
.note-card{scroll-margin-top:90px;border:1px solid #e8dfce;border-radius:16px;background:#fff;padding:23px;box-shadow:0 3px 14px #3e2f1710;overflow-wrap:anywhere}
.note-card h3{font-size:18px;line-height:1.35;margin:15px 0 17px}.note-symbol{font-size:24px;color:#a17b42;font-weight:700}
.note-section{padding:12px 0;border-top:1px solid #eee7dd}.note-section p{font-size:13px;line-height:1.75;margin:8px 0 0;color:#4f483f;white-space:normal}
.note-label{font-size:10px;font-weight:850;letter-spacing:1px;color:#997339}
.note-formula{padding:14px;border:1px solid #ebdab9;background:#fdf8ee;border-radius:10px;margin:4px 0 10px}.note-formula p{line-height:2;font-family:inherit;font-weight:650;color:#594326}
.note-tip,.note-pitfall{padding:12px 14px;border-radius:9px;margin-top:10px;font-size:12px;line-height:1.6}.note-tip{background:#edf4ea;color:#36593b}.note-pitfall{background:#fcf0e7;color:#82543a}
.note-tip p,.note-pitfall p{margin:4px 0 0}.note-footer{border-top:1px solid #ede6d9;display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:16px;padding-top:15px}.note-footer span{font-size:10px;color:#978779;line-height:1.45}.note-footer button{white-space:nowrap}
.studio-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;align-items:start;margin-top:25px}
.studio-grid .white-card{padding:25px}.studio-grid .section-title{margin:10px 0 18px}
.stack-form{display:flex;flex-direction:column;gap:14px}.stack-form label{font-size:12px;font-weight:750;color:#6f5b3e;display:flex;flex-direction:column;gap:7px}
.stack-form select,.stack-form input,.stack-form textarea{width:100%;border:1px solid #d9cbb6;border-radius:9px;padding:11px 12px;background:#fff;color:#2b241c;font-family:inherit;font-size:13px;outline-offset:2px}
.stack-form textarea{resize:vertical;line-height:1.55}.stack-form input[type=file]{padding:11px 8px}.stack-form .fineprint{font-weight:400;line-height:1.65}
.pdf-info{font-size:12px;margin:12px 0;color:#7a6343}.pdf-container{height:min(65vh,700px);position:relative;overflow:hidden;border:1px solid #d7c9b6;border-radius:10px;background:#f2eee7}
.pdf-container iframe{width:100%;height:100%;border:0}.pdf-watermark{pointer-events:none;position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:space-around;transform:rotate(-24deg);font-size:17px;font-weight:850;color:#81643f;opacity:.16;overflow:hidden;white-space:nowrap}
.modal:has(.pdf-container){max-width:970px;width:min(97vw,970px)}
@media(max-width:900px){.notes-layout,.studio-grid{grid-template-columns:1fr}}@media(max-width:650px){.resource-shortcuts,.resource-grid{grid-template-columns:1fr}.resource-card{padding:17px}.resource-actions{flex-direction:column}.resource-actions .button-primary,.resource-actions .button-outline{width:100%}.note-card{padding:18px}.note-footer{flex-direction:column;align-items:stretch}.note-footer button{width:100%}.pdf-container{height:60vh}}

/* v0.4 — KaTeX notation and inline notes preview */
.math-content{white-space:normal;overflow-wrap:break-word}
.math-inline{display:inline}
.math-display{display:block;max-width:100%;min-width:0;overflow-x:auto;overflow-y:hidden;padding:3px 1px 8px;margin:5px 0;-webkit-overflow-scrolling:touch}
.math-display .katex-display{margin:.36em 0;text-align:center;min-width:max-content}
.note-formula .math-display{border-bottom:1px solid #f0e6d4;padding:8px 2px}
.note-formula .math-display:last-child{border-bottom:0}
.note-section .math-content .katex,.preview-section .katex{font-size:1.12em}
.note-section .math-display .katex{font-size:1.14em}
.note-formula p{max-width:100%}
.math-help{display:grid;gap:9px;padding:14px;background:#f8f0df;border:1px solid #e8d6b4;border-radius:11px;color:#6b532b;font-size:12px;line-height:1.6}
.math-help code{background:#fffaf1;border:1px solid #e9dbbb;border-radius:4px;padding:1px 3px;overflow-wrap:anywhere}
.math-toolbar{display:flex;flex-wrap:wrap;gap:6px}.math-toolbar button{padding:7px 9px;font-size:11px}
.editor-preview-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:13px;color:#5f4629;margin-top:5px}
.editor-preview-heading span{font-size:11px;color:#a18f71;font-weight:400}
.editor-preview{border-radius:13px;padding:16px;border:1px solid #dfd1b8;background:#fffaf0;display:grid;gap:11px;min-width:0;max-height:480px;overflow-y:auto}
.preview-mini-label{font-size:11px;font-weight:800;color:#9e763f;letter-spacing:.5px}
.preview-section{font-size:12px;line-height:1.8;color:#4d463a;min-width:0}
.preview-section strong{font-size:10px;display:block;letter-spacing:.7px;text-transform:uppercase;color:#8b6e44}
.preview-formulas{padding:11px;background:white;border:1px solid #eee0c7;border-radius:8px}
.math-errors{background:#fff0e5;border:1px solid #ebbd98;color:#91371e;padding:11px;border-radius:7px;font-size:11px;overflow-wrap:anywhere;line-height:1.5}
@media(max-width:650px){.math-toolbar{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.math-toolbar button{width:100%}.note-section .math-display .katex{font-size:1.03em}}

/* Edition colours are injected by the builder. The layout is inherited from AS v0.4. */
:root{--ink:#242331;--ink-soft:#555361;--cream:#F8F9FC;--ivory:#fff;--card:#fff;--gold:var(--edition);--gold-light:var(--light);--gold-pale:var(--light);--line:#E7E8EE;--muted:#6D7082;--sidebar:var(--deep)}
body{color:var(--ink);background:var(--cream)}
.sidebar{background:linear-gradient(170deg,var(--deep),color-mix(in srgb,var(--deep),#070819 40%));color:#fff;padding-top:27px}
.brand{padding-bottom:34px}.brand-title{font-size:21px;letter-spacing:-.8px}.brand-title span{color:var(--accent)}.brand-mark{background:#ffffff12;border-color:#ffffff35}.brand-mark svg{color:var(--accent)}.brand-sub{color:#ffffff9c;font-size:7px;letter-spacing:.75px}
.side-heading{color:#ffffff76;font-size:9px}.nav-link{color:#ffffffb8;font-size:12px}.nav-link.active{background:var(--accent);color:#291C0B}.nav-link:hover:not(.active){background:#ffffff12;color:#fff}.nav-link:focus-visible{outline:3px solid var(--accent)}
.sidebar-promo{background:#ffffff0a;border-color:#ffffff24}.sidebar-promo p{color:#ffffffb0}.sidebar-promo button{background:var(--accent);color:#291C0B}.promo-star{color:var(--accent)}.side-foot{color:#ffffff83}.edition-switch{display:flex;gap:7px;margin-top:16px}.edition-switch a{display:grid;place-items:center;width:36px;height:34px;border:1px solid #ffffff3a;border-radius:9px;color:#ffffffcf;text-decoration:none;font-weight:700;font-size:12px}.edition-switch a[aria-current]{background:#ffffff20;color:#fff;border-color:#ffffffa0}.suite-link{color:#fff9;display:block;text-decoration:none;font-size:11px;margin:19px 12px 0}
.topbar{background:#ffffffd9}.breadcrumb{color:var(--edition)}.breadcrumb strong{color:var(--ink-soft)}.edition{color:var(--edition);background:var(--light);font-size:9px}.avatar{background:var(--light);color:var(--edition)}.profile-pill{cursor:default;color:var(--ink-soft)}
.hero{background:linear-gradient(110deg,var(--deep) 0%,var(--edition) 115%);min-height:270px;padding:34px 39px}.hero::before{content:'';position:absolute;inset:0;background-image:linear-gradient(#ffffff07 1px,transparent 1px),linear-gradient(90deg,#ffffff07 1px,transparent 1px);background-size:25px 25px;mask-image:linear-gradient(90deg,transparent,#000)}.hero h1{font-size:45px}.hero h1 em,.hero-kicker{color:var(--accent)}.hero p{color:#ffffffce}.hero-number{position:absolute;right:55px;top:20px;color:#ffffff0f;font-size:215px;font-weight:900;letter-spacing:-15px;line-height:1}.hero-curve{color:var(--accent);right:30px;opacity:.25}
.button-primary,.hero .button-primary{background:var(--edition);color:#fff;border:1px solid transparent}.hero .button-primary{background:var(--accent);color:#291C0B;font-weight:800}.button-primary:disabled{opacity:.4;cursor:not-allowed}.button-primary:hover:not(:disabled){filter:brightness(1.08)}.button-outline{color:var(--edition);border-color:color-mix(in srgb,var(--edition),#fff 65%);background:#fff}.button-ghost{color:var(--edition)}.button-dark{background:var(--deep);color:white}.button-primary,.button-outline{text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:14px}
.eyebrow,.topic-foot .arrow,.paper-meta,.note-symbol,.note-label,.stat-icon,.stat-small,.shortcut span,.progress-item .right{color:var(--edition)}.stat-number small{font-size:14px;color:var(--muted);font-weight:500}.stat-card,.topic-card,.paper-card,.mock-card,.question-panel,.side-panel{background:#fff;border-color:var(--line)}.topic-symbol,.paper-illustration,.chip,.topic-badge{background:var(--light);color:var(--edition)}.paper-illustration{font-family:Georgia,serif}.topic-card{transition:transform .15s,box-shadow .15s}.topic-card:hover{transform:translateY(-3px);border-color:var(--edition)}.topic-badge{font-size:8px;letter-spacing:.3px}.topic-card h3{color:var(--ink);font-size:15px}.topic-foot{color:var(--muted)}.topic-grid{margin-top:20px}.section{margin-top:32px}
.premium-banner{background:var(--light);border-color:color-mix(in srgb,var(--edition),#fff 80%)}.premium-banner p{color:var(--ink-soft)}.premium-banner strong{color:var(--deep)}.edition-note{font-size:11px;color:var(--muted);line-height:1.7;margin-top:22px}.pill.active{background:var(--edition);border-color:var(--edition)}.pill{color:var(--ink-soft);background:#fff}.searchbar{align-items:center}.searchbar input{background:#fff}.searchbar input:focus-visible,button:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.note-formula{background:var(--light);border-color:transparent}.note-formula p{color:var(--deep);font-size:14px}.note-section p{color:var(--ink-soft)}.note-card{border-color:var(--line)}.note-card .section-title{margin:15px 0}.note-tip{background:#EFF7EF;color:#315A39}.note-footer{border-color:var(--line)}.option.selected{background:var(--light);border-color:var(--edition)}.option.selected .option-key{background:var(--edition);border-color:var(--edition)}.question-count{color:var(--edition)}.option.correct{background:#EAF7ED;border-color:#3C8A51}.option.incorrect{background:#FFF0EF;border-color:#C86E69}.option-key{background:#F6F7FA;border-color:var(--line)}.progress-fill{background:var(--edition)}.progress-track{background:#EAECF2}.panel-row,.side-panel p{color:var(--muted)}.timer{font-size:36px;font-variant-numeric:tabular-nums;font-weight:800;color:var(--edition);margin:20px 0}.feedback p{margin:8px 0 0}.footer{color:var(--muted)}.empty{color:var(--muted);border-color:var(--line)}.resource-status.pending{display:inline-block;margin-top:18px;background:#F1F3F7;color:var(--muted);font-size:11px}.toast{background:var(--deep);color:white;border-color:#ffffff33}.page:focus{outline:0}.skip-link{position:fixed;left:12px;top:-80px;padding:12px 18px;background:#fff;color:var(--deep);z-index:100}.skip-link:focus{top:10px}.mock-card .section-title{font-size:19px}
@media(max-width:660px){.hero{padding:26px 23px;min-height:252px}.hero h1{font-size:35px}.hero-number{right:22px;top:45px;font-size:185px}.hero-text{max-width:290px}.hero-kicker{font-size:8px;letter-spacing:1.3px}.hero p{font-size:12px;max-width:230px}.topic-card h3{font-size:13px}.topic-badge{font-size:7px}.topic-symbol{font-size:20px}.topic-top{gap:5px}.hero-curve{right:-60px}.profile-pill{font-size:0}.profile-pill .avatar{font-size:12px}.progress-item{grid-template-columns:1.5fr 1fr 35px}.flex-between .button-ghost{white-space:nowrap;font-size:10px}.brand-sub{font-size:7px}.searchbar .pill-tabs{gap:5px}.pill{font-size:10px;padding:9px 11px}}
@media(prefers-reduced-motion:reduce){.topic-card:hover{transform:none}}