:root{--ink:#17241f;--muted:#78847f;--green:#173d31;--green2:#235541;--lime:#d6f36a;--paper:#f6f7f2;--line:#e7ebe3;--white:#fff;--orange:#f5a14e;--red:#de695e;--shadow:0 16px 48px #20392a12}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',sans-serif;font-size:14px}.shell{min-height:100vh;display:grid;grid-template-columns:248px minmax(0,1fr)}.sidebar{background:#10251e;color:#fff;padding:30px 18px 20px;display:flex;flex-direction:column;min-height:100vh;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:11px;color:#fff;text-decoration:none;font:800 23px Manrope,sans-serif;letter-spacing:-1.4px;margin:0 8px 55px}.brand-mark{width:37px;height:37px;display:grid;place-items:center;background:var(--lime);color:#153226;border-radius:12px;font-size:20px;letter-spacing:-1px}.brand-light{color:var(--lime)}.brand small{display:block;font:600 8px 'DM Sans',sans-serif;color:#9eaea6;letter-spacing:1.6px;margin-top:1px}.side-label{font-size:10px;font-weight:700;letter-spacing:1.6px;color:#778d83;padding:0 12px;margin-bottom:11px}.nav{display:grid;gap:5px}.nav-item{border:0;background:transparent;color:#a9b7b0;text-align:left;padding:12px 13px;border-radius:10px;font:600 13px 'DM Sans',sans-serif;cursor:pointer;display:flex;align-items:center;gap:12px;transition:.18s}.nav-item:hover{background:#ffffff0b;color:white}.nav-item.active{background:#254535;color:#fff;box-shadow:inset 3px 0 var(--lime)}.nav-icon{width:17px;font-size:17px;text-align:center;color:#a4b6ab}.active .nav-icon{color:var(--lime)}.nav-count{margin-left:auto;background:#ffffff14;padding:3px 7px;border-radius:20px;font-size:10px;color:#c6d1cb}.side-bottom{margin-top:auto}.streak-card{border:1px solid #ffffff1a;background:#ffffff08;border-radius:14px;padding:14px 13px;margin:0 3px 18px}.streak-top{display:flex;align-items:center;gap:7px;color:var(--lime);font-size:9px;font-weight:700;letter-spacing:1px}.streak-days{margin-left:auto;color:white;letter-spacing:0;font-size:10px}.streak-card p{color:#a9b7b0;font-size:11px;margin:10px 0 13px}.week{display:flex;justify-content:space-between}.week span{font-size:9px;color:#89988f;display:grid;justify-items:center;gap:5px}.week i{width:18px;height:18px;border-radius:50%;background:#ffffff12;display:block}.week i.done{background:var(--lime);color:#163329;font-style:normal;text-align:center;line-height:18px;font-size:11px}.sidebar-foot{color:#819188;font-size:9px;display:flex;align-items:center;gap:7px;padding:0 6px}.dot{width:6px;height:6px;border-radius:50%;background:var(--lime)}.main{min-width:0;padding:0 5.1vw;max-width:1600px;width:100%;margin:auto}.topbar{height:76px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}.crumb{font-size:10px;font-weight:700;letter-spacing:1.45px;color:#728078}.crumb span{padding:0 8px;color:#c3cbc4}.top-actions{display:flex;align-items:center;gap:14px}.lang-chip{border:1px solid var(--line);border-radius:20px;background:#fff;padding:8px 11px;color:#63716a;font:700 10px 'DM Sans';cursor:pointer}.lang-chip span{padding-left:4px}.avatar{width:32px;height:32px;border:0;border-radius:50%;background:#dfebd9;color:#254a38;font:700 12px Manrope;cursor:pointer}.footer{font-size:10px;color:#849088;border-top:1px solid var(--line);padding:17px 0;margin-top:46px}.footer a{color:#426c53;text-decoration:none;margin-left:7px}.content{padding:32px 0 0}.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:700;color:#7d8982;text-transform:uppercase}.hero{display:grid;grid-template-columns:1.2fr .8fr;gap:25px;align-items:stretch}.hero-copy{padding:20px 0}.hero h1{font:700 clamp(36px,4vw,58px)/1.05 Manrope,sans-serif;letter-spacing:-2.4px;margin:14px 0 14px;max-width:620px}.hero h1 em{font-style:normal;color:#71934d}.hero-copy>p{color:#7b8780;line-height:1.7;max-width:475px;margin:0 0 23px;font-size:14px}.button{border:0;border-radius:8px;background:var(--green);color:#fff;padding:13px 17px;font:700 12px 'DM Sans';cursor:pointer;display:inline-flex;align-items:center;gap:12px;transition:.2s}.button:hover{background:#24553e;transform:translateY(-1px)}.button .arrow{color:var(--lime);font-size:16px}.button.secondary{background:#e9eee5;color:#355343}.button.secondary:hover{background:#dfe9d8}.button.outline{border:1px solid #dce4da;background:#fff;color:#344b3d}.button.small{padding:10px 13px;font-size:11px}.hero-art{background:#e7eddd;border-radius:17px;min-height:258px;position:relative;overflow:hidden;padding:19px}.art-tag{font-size:9px;font-weight:700;letter-spacing:1px;color:#697b61}.scene{position:absolute;inset:51px 0 0;overflow:hidden}.hill{position:absolute;width:130%;height:180px;left:-12%;bottom:-105px;background:#b5cc8c;border-radius:50%}.hill.two{width:100%;height:138px;left:32%;bottom:-98px;background:#8faa6e}.road{position:absolute;bottom:-89px;left:16%;width:69%;height:190px;border-radius:50% 50% 0 0;background:#526259;transform:perspective(120px) rotateX(14deg)}.road:before{content:"";position:absolute;top:0;left:50%;height:100%;border-left:3px dashed #e5e7d7}.sun{position:absolute;right:20%;top:9px;width:45px;height:45px;border-radius:50%;background:#d8ef76}.sign{position:absolute;left:17%;top:16px;height:98px;width:4px;background:#617259}.sign:before{content:"B";position:absolute;top:0;left:-16px;width:36px;height:27px;border-radius:6px;background:#f8f9ef;color:#34533d;display:grid;place-items:center;font:800 13px Manrope;box-shadow:0 3px 8px #334a2520}.car{position:absolute;z-index:2;left:49%;bottom:22px;width:93px;height:43px;border-radius:20px 22px 10px 9px;background:#d7f26c;box-shadow:0 11px 18px #21332633;transform:rotate(-2deg)}.car:before{content:"";position:absolute;width:54px;height:26px;border-radius:26px 25px 0 0;left:19px;top:-17px;background:#a6c34d;clip-path:polygon(18% 0,78% 0,100% 100%,0 100%)}.car:after{content:"";position:absolute;left:13px;bottom:-6px;width:15px;height:15px;border-radius:50%;background:#273a30;box-shadow:55px 0 #273a30}.progress-pill{position:absolute;right:13px;bottom:13px;z-index:3;background:#fff;padding:9px 12px;border-radius:9px;font-size:9px;font-weight:700;color:#506050;box-shadow:var(--shadow)}.progress-pill b{font-size:14px;color:#234433;margin-right:4px}.section-head{display:flex;align-items:end;justify-content:space-between;margin:37px 0 15px}.section-head h2{font:700 20px Manrope;letter-spacing:-.6px;margin:0}.section-head p{font-size:11px;color:#8a948e;margin:6px 0 0}.link-btn{border:0;background:none;color:#426d4d;font:700 11px 'DM Sans';cursor:pointer}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}.stat{border:1px solid var(--line);background:#fff;border-radius:12px;padding:15px 16px;display:flex;align-items:center;gap:12px}.stat-icon{width:36px;height:36px;border-radius:10px;background:#eff4e8;color:#557541;display:grid;place-items:center;font-size:16px}.stat strong{font:700 21px Manrope;letter-spacing:-1px}.stat label{display:block;font-size:10px;color:#849087;margin-top:2px}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.topic-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:15px;cursor:pointer;transition:.18s;text-align:left}.topic-card:hover{border-color:#bdd198;transform:translateY(-2px);box-shadow:var(--shadow)}.topic-top{display:flex;align-items:center;justify-content:space-between}.topic-emoji{width:32px;height:32px;background:#f0f4eb;border-radius:9px;display:grid;place-items:center;font-size:16px}.topic-count{font-size:9px;color:#94a098}.topic-card h3{font:700 12px Manrope;margin:12px 0 8px}.bar{height:4px;background:#eef1eb;border-radius:6px;overflow:hidden}.bar i{height:100%;display:block;background:#8baa68;border-radius:6px}.topic-meta{display:flex;justify-content:space-between;margin-top:7px;color:#8c9790;font-size:9px}.topic-meta b{color:#5e7b49}.callout{background:#193b2f;border-radius:15px;margin-top:24px;padding:18px 20px;color:white;display:flex;align-items:center;justify-content:space-between}.callout small{font-size:9px;color:#b5c6bb;letter-spacing:1px;font-weight:700}.callout h3{font:700 16px Manrope;margin:5px 0 0}.callout .button{background:var(--lime);color:#233b2e;padding:10px 12px}.callout .button .arrow{color:#234433}.view-title{display:flex;align-items:end;justify-content:space-between;margin:35px 0 22px}.view-title h1{font:700 34px Manrope;letter-spacing:-1.5px;margin:8px 0 0}.view-title p{color:#818c85;margin:8px 0 0;font-size:12px}.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:17px}.filter{border:1px solid #e2e8e0;border-radius:25px;background:#fff;padding:8px 12px;color:#718078;font:600 10px 'DM Sans';cursor:pointer}.filter.active{background:#214635;border-color:#214635;color:#fff}.question-layout{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:15px}.question-card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:23px;box-shadow:0 7px 24px #20392a08}.q-meta{display:flex;align-items:center;gap:8px;font-size:9px;color:#829087;font-weight:700;letter-spacing:.6px}.q-chip{background:#eff4e9;padding:6px 8px;border-radius:5px;color:#5e7547}.q-number{margin-left:auto}.question-card h2{font:700 20px/1.45 Manrope;letter-spacing:-.5px;margin:18px 0 18px}.answers{display:grid;gap:8px}.answer{display:flex;align-items:flex-start;gap:11px;border:1px solid #e7ece5;border-radius:9px;padding:12px;cursor:pointer;transition:.15s}.answer:hover{border-color:#c6d6b6;background:#fbfcf9}.answer input{appearance:none;width:16px;height:16px;border:1.5px solid #cbd4cb;margin:1px 0 0;border-radius:4px;flex:none;position:relative}.answer input:checked{background:#315d43;border-color:#315d43}.answer input:checked:after{content:'✓';position:absolute;color:white;font-size:11px;left:2px;top:-1px}.answer span{font-size:12px;line-height:1.5;color:#4e5b54}.answer.correct{background:#f1f7e9;border-color:#b4ce94}.answer.wrong{background:#fff3ef;border-color:#e5aaa0}.question-actions{display:flex;align-items:center;justify-content:space-between;margin-top:17px}.text-button{border:0;background:none;color:#748178;font:600 10px 'DM Sans';cursor:pointer;padding:8px 3px}.feedback{display:none;margin-top:14px;padding:12px;border-radius:9px;font-size:11px;line-height:1.55}.feedback.show{display:block}.feedback.ok{background:#f0f7e9;color:#486438}.feedback.no{background:#fff2ed;color:#8c4c40}.q-side{background:#eef2e9;border-radius:14px;padding:17px;height:max-content}.q-side h3{font:700 13px Manrope;margin:0 0 11px}.q-side p{font-size:10px;line-height:1.6;color:#738076}.q-side .mini{border-top:1px solid #dce5d7;margin-top:14px;padding-top:13px;font-size:10px;color:#647267}.q-side .mini b{color:#344e3b}.learn-footer{display:flex;justify-content:space-between;color:#849087;font-size:10px;margin-top:12px}.empty{background:white;border:1px solid var(--line);border-radius:15px;padding:32px;text-align:center;color:#7e8a82}.flash-wrap{max-width:760px;margin:auto}.flash-card{min-height:315px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:var(--shadow);cursor:pointer}.flash-card .front{display:block}.flash-card .back{display:none}.flash-card.revealed .front{display:none}.flash-card.revealed .back{display:block}.flash-card h2{font:700 25px/1.4 Manrope;letter-spacing:-.8px;max-width:600px}.flash-card p{font-size:13px;color:#69776e;line-height:1.8}.flash-controls{display:flex;justify-content:space-between;align-items:center;margin-top:15px}.exam-banner{background:#1d4334;color:white;border-radius:16px;padding:25px;display:flex;justify-content:space-between;align-items:center}.exam-banner h2{font:700 21px Manrope;margin:8px 0}.exam-banner p{font-size:11px;color:#c3d1c6;margin:0;line-height:1.6;max-width:440px}.exam-banner .button{background:var(--lime);color:#183629}.exam-banner .button .arrow{color:#183629}.result{text-align:center;background:#fff;border:1px solid var(--line);border-radius:15px;padding:30px}.result-score{font:800 48px Manrope;color:#315f43}.result h2{font:700 23px Manrope}.result p{color:#77847c}.timer{background:#eff3e9;border-radius:8px;padding:8px 11px;font:700 13px Manrope;color:#42623f}.toast{position:fixed;bottom:20px;right:22px;padding:11px 15px;border-radius:9px;background:#173d31;color:white;font-size:11px;box-shadow:var(--shadow);animation:fade .2s}@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media(max-width:1000px){.shell{grid-template-columns:210px 1fr}.main{padding:0 3vw}.hero{grid-template-columns:1fr .8fr}.question-layout{grid-template-columns:1fr}.q-side{display:none}}@media(max-width:700px){.shell{display:block}.sidebar{position:sticky;z-index:10;top:0;height:auto;min-height:0;padding:10px 12px;display:block}.brand{margin:0 0 9px;font-size:19px}.brand-mark{width:31px;height:31px;border-radius:9px}.brand small{font-size:7px}.side-label,.side-bottom{display:none}.nav{display:flex;overflow:auto;gap:4px}.nav-item{white-space:nowrap;padding:8px 10px;font-size:10px;gap:6px}.nav-icon{font-size:13px}.nav-count{display:none}.main{padding:0 17px}.topbar{height:52px}.hero{grid-template-columns:1fr}.hero-copy{padding:18px 0 0}.hero h1{font-size:39px}.hero-art{min-height:205px}.section-head{margin-top:28px}.stats{gap:7px}.stat{padding:10px;gap:7px}.stat-icon{width:28px;height:28px}.stat strong{font-size:17px}.stat label{font-size:8px}.topic-grid{grid-template-columns:repeat(2,1fr);gap:8px}.topic-card{padding:11px}.topic-card h3{font-size:11px}.callout{padding:15px}.callout h3{font-size:13px}.view-title h1{font-size:28px}.view-title{align-items:center}.question-card{padding:16px}.question-card h2{font-size:17px}.answer span{font-size:11px}.exam-banner{padding:18px;gap:10px;align-items:flex-start;flex-direction:column}.footer{line-height:1.7}.flash-card{min-height:280px;padding:23px}.flash-card h2{font-size:20px}}