/* Longer student navigation stays usable on shorter screens. */
.sidebar{overflow-y:auto}
:root{--ink:#172b26;--muted:#76817b;--green:#176b46;--line:#e3e9e3;--paper:#f5f7f3}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:14px}button,input,select,textarea{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #d8a646;outline-offset:3px}.shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.sidebar{background:#fff;border-right:1px solid var(--line);padding:30px 22px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column}.brand{display:flex;gap:11px;align-items:center;font-weight:800;font-size:16px;line-height:1.3}.brand small{display:block;font-weight:500;color:var(--muted);font-size:10px;letter-spacing:2px;margin-top:4px}.brandmark{border-radius:12px;background:#176b46;color:#fff;width:43px;height:43px;display:grid;place-items:center}.nav-label{font-size:10px;letter-spacing:1.6px;color:#a1aaa5;margin:40px 14px 12px}.nav{display:flex;flex-direction:column;gap:6px}.nav button{border:0;background:none;padding:13px 14px;border-radius:9px;display:flex;align-items:center;gap:13px;color:#7b8780;text-align:left;font-weight:600}.nav button.active{background:#e9f2eb;color:#176b46}.nav svg{width:18px}.nav .badge{margin-left:auto;font-size:10px;background:#e9f2eb;color:#176b46;padding:3px 6px;border-radius:4px}.sidebar-foot{margin-top:auto;background:#f4f7ef;border-radius:13px;padding:17px;line-height:1.6;font-size:12px}.sidebar-foot b{display:block;font-size:14px}.main{min-width:0}.topbar{height:83px;border-bottom:1px solid var(--line);background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 42px;gap:14px}.crumb{font-size:12px;color:#8b958f}.crumb b{color:var(--ink);margin-left:9px}.top-right{display:flex;align-items:center;gap:18px}.avatar{height:36px;width:36px;display:inline-grid;place-items:center;background:#efeadb;color:#776544;font-weight:700;border-radius:50%;flex-shrink:0}.content{max-width:1430px;margin:auto;padding:34px 42px 50px}.eyebrow{font-size:10px;text-transform:uppercase;letter-spacing:1.8px;font-weight:700;color:#768b7e}.heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px;gap:15px}h1{font-size:29px;letter-spacing:-1px;margin:9px 0 10px;font-weight:650}h2{font-size:19px;margin:0 0 16px;letter-spacing:-.4px}h3{font-size:16px;margin:0 0 8px}.muted{color:var(--muted);line-height:1.6}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);border-radius:8px;padding:10px 16px;background:white;color:var(--ink);font-weight:600;font-size:12px}.btn.primary{background:var(--green);color:#fff;border-color:var(--green)}.btn.soft{background:#eaf2e9;color:#176b46;border:0}.btn.small{padding:8px 12px}.hero{background:#174c37;color:#fff;border-radius:17px;position:relative;overflow:hidden;min-height:230px;padding:32px 36px;margin-bottom:25px;display:flex;justify-content:space-between;align-items:center}.hero .eyebrow{color:#b1d2bb}.hero h2{font-size:31px;line-height:1.22;max-width:410px;margin:14px 0;letter-spacing:-1px;font-weight:500}.hero p{color:#bad1c3;font-size:12px;max-width:380px;line-height:1.8}.hero .btn{background:#e6eea4;border:0;color:#244c35;margin-top:7px}.orbit{position:relative;width:240px;height:190px;display:grid;place-items:center}.orbit:before,.orbit:after{content:'';position:absolute;width:230px;height:230px;border:1px solid #57866b;border-radius:50%;transform:rotate(-25deg) scaleY(.6)}.orbit:after{transform:rotate(50deg) scaleY(.6)}.planet{width:132px;height:132px;border-radius:50%;background:radial-gradient(circle at 30% 25%,#b5d3a1,#619e73 50%,#32624b);box-shadow:0 0 60px #598d5266;display:grid;place-items:center}.planet svg{width:100px;height:100px;stroke:#d5e6b4;stroke-width:.6}.orbit-tag{position:absolute;padding:8px 13px;border:1px solid #ffffff33;border-radius:9px;background:#275b45;font-size:11px;z-index:1}.orbit-tag.top{top:0;right:0}.orbit-tag.bottom{bottom:0;left:0}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:30px}.stat{border:1px solid var(--line);border-radius:12px;background:white;padding:19px;display:flex;gap:13px;align-items:flex-start}.iconbox{display:grid;place-items:center;width:36px;height:36px;background:#edf3eb;color:#508663;border-radius:10px;flex-shrink:0}.iconbox svg{width:18px}.stat b{font-size:25px;display:block;letter-spacing:-.8px;margin:7px 0}.stat small{font-size:10px;color:#8c958f}.stat-label{font-size:11px;color:#808b84}.split{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:25px}.section-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:17px}.section-top h2{margin:0}.tabs{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:21px}.tabs button{border:1px solid var(--line);background:white;border-radius:7px;padding:8px 14px;font-size:11px;color:#7a847f}.tabs button.active{background:#176b46;color:#fff;border-color:#176b46}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.card{padding:21px;border:1px solid var(--line);border-radius:12px;background:#fff}.card-title{font-size:16px;font-weight:650;line-height:1.4;margin:14px 0 10px}.card-meta{display:flex;gap:13px;font-size:11px;color:#859087;flex-wrap:wrap;line-height:1.7}.chip{font-size:9px;font-weight:700;letter-spacing:.7px;display:inline-block;padding:5px 8px;border-radius:4px;background:#eaf2ed;color:#3a7d57}.chip.purple{background:#efedf8;color:#7d71a4}.chip.orange{background:#f8f0e3;color:#b88d44}.card-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:21px;padding-top:16px;border-top:1px solid #edf0ec}.price{font-weight:700;font-size:16px}.price small{display:block;font-size:9px;color:#88938a;font-weight:400;margin-top:4px}.panel{border:1px solid var(--line);border-radius:12px;background:#fff;padding:22px;margin-bottom:20px}.live-row{border-bottom:1px solid #edf0ec;padding:15px 0;display:flex;gap:11px}.datebox{background:#f1f5eb;border-radius:8px;min-width:42px;height:49px;display:flex;flex-direction:column;justify-content:center;align-items:center;color:#658454;font-size:9px}.datebox b{font-size:18px;margin-bottom:3px}.live-row h3{font-size:12px;line-height:1.5;margin:0 0 5px}.live-row p{font-size:10px;color:var(--muted);margin:0}.grow{flex:1}.progress{height:7px;background:#edf0eb;border-radius:7px;margin:14px 0 8px;overflow:hidden}.progress span{display:block;height:100%;background:#73906d;border-radius:7px}.subject{display:flex;justify-content:space-between;font-size:11px;margin-top:17px}.tip{background:#f1f3e7;border:1px solid #e8ecda;border-radius:12px;padding:21px;font-size:12px;line-height:1.7;color:#738065}.tip b{display:block;color:#526743;margin-bottom:8px}.notice{background:#fff7df;border:1px solid #ecdfb9;padding:12px 16px;border-radius:9px;font-size:12px;line-height:1.7;margin-bottom:22px}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#172b26;color:#fff;border-radius:10px;padding:14px 22px;z-index:100;max-width:90vw;box-shadow:0 10px 40px #0002}.modal-bg{position:fixed;inset:0;background:#172b2670;display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}.modal{background:#fff;border-radius:16px;padding:28px;width:min(650px,100%);max-height:90vh;overflow:auto}.modal header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.field{display:block;margin:14px 0;font-size:12px;font-weight:600}.field input,.field select,.field textarea{display:block;width:100%;border:1px solid #dce3dc;border-radius:8px;padding:11px;margin-top:7px;background:#fff;color:var(--ink)}.field textarea{min-height:85px}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}.empty{padding:45px 20px;text-align:center;border:1px dashed #cedacd;border-radius:12px;background:#fafbf8;color:#7f8b80;line-height:1.8}.row{display:flex;align-items:center;gap:13px;padding:15px 0;border-bottom:1px solid var(--line)}.right{margin-left:auto}.results-table{width:100%;border-collapse:collapse;font-size:12px}.results-table th,.results-table td{text-align:left;padding:14px 9px;border-bottom:1px solid var(--line)}.results-table th{color:var(--muted);font-weight:500}.exam-layout{display:grid;grid-template-columns:1fr 260px;gap:23px}.question{font-size:19px;line-height:1.8;margin:25px 0}.option{display:flex;align-items:center;gap:12px;width:100%;border:1px solid var(--line);background:white;border-radius:9px;padding:15px;margin:12px 0;text-align:left}.option.selected{border-color:#176b46;background:#edf5ee}.option span{display:grid;place-items:center;border:1px solid #d8e2d8;border-radius:5px;width:26px;height:26px;font-size:12px}.palette{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.palette button{border:1px solid var(--line);background:#f8faf6;border-radius:5px;padding:9px;color:var(--ink)}.palette button.answered{background:#176b46;color:white}.palette button.review{background:#8975b6;color:white}.palette button.current{outline:2px solid #d6ae5d;outline-offset:2px}.timer{font-size:28px;font-variant-numeric:tabular-nums;color:#176b46;letter-spacing:1px}.status{font-size:10px;color:#176b46;background:#e9f2eb;padding:5px 8px;border-radius:5px}.footer{color:#939d95;font-size:10px;text-align:center;padding-top:35px;line-height:1.8}.mobile-brand{display:none}.search{border:1px solid var(--line);border-radius:8px;padding:10px 14px;width:220px;background:#fafbf8;font-size:12px}.earnings{background:#174c37;color:white;padding:25px;border-radius:14px;margin-bottom:22px}.earnings b{display:block;font-size:34px;margin:15px 0}.earnings .muted{color:#bad1c3}.back{border:0;background:none;color:#176b46;padding:0;margin-bottom:20px;font-weight:600}.inline{display:flex;gap:9px;align-items:center;flex-wrap:wrap}.list{line-height:2;font-size:13px;color:var(--muted);padding-left:18px}input[type=checkbox]{accent-color:#176b46}.link{color:#176b46;font-size:11px;border:0;background:none}.wide{width:100%}.danger{color:#a74232}.explanation{background:#f4f7ef;border-radius:9px;padding:16px;font-size:13px;line-height:1.7;margin-top:13px}.art-mini{width:58px;height:58px;border-radius:12px;background:#e9f0df;color:#627e50;display:grid;place-items:center}.art-mini svg{width:30px;height:30px}.pill{font-size:11px;border:1px solid var(--line);border-radius:20px;padding:7px 12px}.pill strong{color:#176b46}.feature-row{display:flex;gap:9px;align-items:center;margin:15px 0;font-size:12px}video{width:100%;border-radius:8px}.check-line{display:flex;gap:10px;line-height:1.7;font-size:12px;color:var(--muted)}
@media(max-width:1150px){.shell{grid-template-columns:205px 1fr}.sidebar{padding:24px 15px}.content{padding:27px}.topbar{padding:0 27px}.split{grid-template-columns:1fr}.aside-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.hero{padding:28px}.stats{gap:10px}.stat{padding:14px}.search{width:160px}}@media(max-width:760px){.shell{display:block}.sidebar{height:auto;position:static;border-right:0;padding:16px}.sidebar .brand,.nav-label,.sidebar-foot{display:none}.nav{flex-direction:row;overflow:auto;gap:3px}.nav button{white-space:nowrap;padding:10px;font-size:11px;gap:6px}.nav svg{width:15px}.nav .badge{display:none}.topbar{height:67px;padding:0 18px}.mobile-brand{display:flex;font-weight:700;font-size:13px;align-items:center;gap:8px}.mobile-brand .brandmark{width:30px;height:30px;border-radius:8px}.crumb,.search,.top-right .account-label{display:none}.top-right{gap:9px}.content{padding:24px 18px}.heading{align-items:flex-start}h1{font-size:24px}.hero{padding:25px;min-height:230px}.hero h2{font-size:26px}.orbit{display:none}.stats{grid-template-columns:1fr 1fr}.cards{grid-template-columns:1fr}.aside-grid{display:block}.grid2{grid-template-columns:1fr}.exam-layout{grid-template-columns:1fr}.exam-layout aside{order:-1}.exam-layout aside .palette{grid-template-columns:repeat(9,1fr)}.topbar .avatar{display:none}.modal{padding:22px}.results-table{font-size:11px}.results-table th,.results-table td{padding:12px 5px}.content .heading .btn{font-size:10px;padding:9px}.stat b{font-size:23px}.question{font-size:17px}}

.auth-page{display:grid;grid-template-columns:1fr 460px;gap:70px;align-items:center;max-width:1200px;min-height:90vh;margin:auto;padding:50px}.auth-intro h1{font-size:54px;line-height:1.15;color:#174c37;letter-spacing:-2px}.auth-intro p{max-width:470px;line-height:1.9;color:#76817b}.auth-card{padding:30px}.insight-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.insight-subject{padding:12px;background:#f6f8f2;border-radius:9px}.insight-subject .subject{margin-top:0;gap:9px;flex-wrap:wrap}@media(max-width:800px){.auth-page{display:block;padding:28px 18px}.auth-intro h1{font-size:36px}.auth-intro{margin-bottom:30px}.insight-grid{grid-template-columns:1fr}}

.login-options{display:grid;gap:10px;margin:20px 0}.filter-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.tutor-avatar{width:64px;height:64px;overflow:hidden}.status.available{background:#daf2e2;color:#14543b}.review-row{padding:20px 0;border-top:1px solid #e3e9e3}.review-row .status{margin-left:12px}.doubt-image{max-width:100%;max-height:320px;object-fit:contain;border-radius:12px;margin:12px 0}.session-messages{max-height:440px;overflow-y:auto;display:flex;flex-direction:column;gap:12px;padding:16px;background:#f4f7f3;border-radius:14px}.session-message{max-width:85%;padding:14px;border:1px solid #e0e8df;border-radius:14px;background:white}.session-message.mine{align-self:flex-end;background:#e6f1e8}.session-message p{margin:8px 0}.session-message small{color:#7a877e}@media(max-width:900px){.filter-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:560px){.filter-grid{grid-template-columns:1fr}.session-message{max-width:100%}.auth-card .tabs{flex-wrap:wrap}}

.logout-button{flex-shrink:0;white-space:nowrap}.logout-button svg{display:block}@media(max-width:560px){.topbar .top-right{gap:8px}.logout-button{padding:8px 10px!important;font-size:12px!important}}