:root{--bg:#f5f4ee;--card:#fffefa;--ink:#243d35;--muted:#738078;--line:#dce3d9;--green:#385c4f;--pale:#edf2e8;--amber:#926b2c;--red:#ad4939;--shadow:0 12px 44px #243d3509}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.5;cursor:default}a{color:var(--green);text-underline-offset:3px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #b3caa5;outline-offset:3px}[hidden]{display:none!important}.shell{max-width:1380px;margin:auto;display:grid;grid-template-columns:216px minmax(0,1fr);min-height:100vh}.sidebar{border-right:1px solid var(--line);padding:35px 23px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:28px}.brand{font-weight:760;letter-spacing:.08em;font-size:23px}.brand small{font-size:11px;letter-spacing:.1em;background:var(--pale);border-radius:5px;padding:4px 6px;color:var(--green)}.side-sub{font-size:12px;color:var(--muted);letter-spacing:.11em;margin-top:-15px}.navigation{display:flex;flex-direction:column;gap:7px}.nav-btn{border:0;background:none;text-align:left;padding:12px 14px;border-radius:10px;color:var(--muted);display:flex;align-items:center;gap:12px}.nav-btn.active{background:#e6eddf;color:var(--green);font-weight:650}.nav-icon{font-size:21px;min-width:25px}.sidebar-foot{margin-top:auto;font-size:12px;color:var(--muted)}.main{padding:28px 46px 65px;min-width:0}.topline{display:flex;justify-content:space-between;gap:14px;align-items:center;margin-bottom:30px;font-size:13px;color:var(--muted)}.sync-pill{border:1px solid var(--line);border-radius:30px;background:var(--card);padding:6px 12px;font-size:12px;color:var(--green)}.sync-pill.warn{color:var(--red);border-color:#dab6aa}.eyebrow{text-transform:uppercase;letter-spacing:.17em;font-size:11px;color:var(--muted);font-weight:650;margin:0 0 8px}.hero h1{font-size:35px;letter-spacing:-.035em;margin:0 0 11px;line-height:1.3}.hero p{margin:0;color:var(--muted)}.hero{margin-bottom:28px}.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:24px 0}.stat{padding:18px 20px;background:#fbfbf7;border:1px solid var(--line);border-radius:14px}.stat .num{display:block;font-size:29px;font-weight:650;margin-top:3px}.stat small{color:var(--muted);font-size:13px}.two-col{display:grid;grid-template-columns:1.13fr 1fr;gap:20px}.panel{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:25px;box-shadow:var(--shadow);margin-bottom:18px;min-width:0}.panel.featured{background:var(--green);color:#fffdf5;border-color:var(--green)}.panel.featured p,.panel.featured .eyebrow{color:#dce7d9}.panel h2{font-size:23px;line-height:1.4;margin:2px 0 10px}.panel h3{font-size:18px;margin:0 0 9px}.panel p{margin:7px 0}.fine{font-size:13px;color:var(--muted)}.buttons{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:18px}.btn{border:1px solid var(--line);border-radius:10px;padding:10px 16px;min-height:44px;background:transparent;color:var(--green);font-weight:600;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:7px}.btn.primary{color:var(--card);background:var(--green);border-color:var(--green)}.featured .btn.primary{color:var(--green);background:#edf2df;border-color:#edf2df}.btn.small{padding:7px 11px;min-height:38px;font-size:13px}.btn.danger{color:var(--red);border-color:#dfc6bb}.btn.text{padding:6px 0;border:0;min-height:32px}.progress{height:6px;background:#e9ede5;border-radius:9px;overflow:hidden;margin:16px 0 8px}.progress i{display:block;height:100%;background:#6c916b}.featured .progress{background:#638173}.featured .progress i{background:#d4e5b6}.plan-card{display:grid;grid-template-columns:48px minmax(0,1fr) auto;gap:17px;align-items:start}.day-dot{background:var(--pale);width:42px;height:42px;display:grid;place-items:center;border-radius:50%;font-weight:700}.plan-card h2{font-size:21px}.plan-card.current{border-color:#9eb296}.badge{display:inline-block;font-size:11px;padding:3px 9px;border-radius:16px;background:var(--pale);color:var(--green);white-space:normal}.badge.amber{background:#f4eedb;color:var(--amber)}details{border-top:1px solid var(--line);margin-top:17px;padding-top:13px}summary{cursor:pointer;color:var(--green);font-size:14px;font-weight:650}details[open]>summary{margin-bottom:12px}.unit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.unit-btn{border:1px solid var(--line);border-radius:9px;background:#fafbf7;padding:10px;text-align:left;font-size:13px;color:var(--ink)}.unit-btn small{display:block;color:var(--muted)}.study-wrap{max-width:800px;margin:0 auto}.study-head{display:flex;justify-content:space-between;gap:12px;align-items:center;font-size:13px;color:var(--muted);margin-bottom:15px}.word{font-size:38px;line-height:1.22;font-weight:650;overflow-wrap:anywhere;text-align:center;margin:34px 0 14px;color:var(--ink);letter-spacing:-.02em}.prompt-sub{text-align:center;color:var(--muted);font-size:13px;margin-bottom:35px}.context-prompt{font:19px/1.8 Georgia,serif;padding:18px 22px;background:#f5f6ef;border-radius:12px}.answer-label{display:flex;justify-content:space-between;margin-bottom:9px;font-weight:650}.answer-label small{font-size:12px;font-weight:400;color:var(--muted)}textarea,input[type=email],input[type=password],input[type=text],input[type=date],select{width:100%;border:1px solid #cdd8c9;border-radius:10px;color:var(--ink);background:#fafbf7;padding:11px 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button{background:var(--card);font-size:14px;padding:13px 6px}.rating-bar button.selected{border:2px solid var(--green);background:#dce9d1}.bottom-actions{display:flex;justify-content:space-between;gap:12px;margin-top:16px}.word-list{display:grid;gap:8px}.word-row{background:#fafbf7;border:1px solid var(--line);border-radius:10px;padding:13px 15px;display:flex;gap:12px;align-items:center;justify-content:space-between;min-width:0}.word-row b{font-weight:600;overflow-wrap:anywhere}.word-row small{display:block;color:var(--muted)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.section-heading{display:flex;align-items:center;justify-content:space-between;margin:28px 0 14px}.section-heading h2{font-size:20px;margin:0}.notice-box{background:#f2eedf;border:1px solid #e3dbc4;padding:13px 16px;border-radius:10px;font-size:13px;margin-bottom:16px}.login{max-width:950px;min-height:90vh;margin:auto;padding:54px 30px;display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}.login h1{font-size:42px;line-height:1.25}.login .brand{margin-bottom:30px}.login .panel{padding:28px}.login .note{font-size:13px;color:var(--muted);margin:20px 0}.auth-tabs{display:flex;gap:10px;margin-bottom:22px}.auth-tabs .btn{flex:1;font-size:14px}.auth-error{font-size:14px;color:var(--red);margin-top:14px;white-space:pre-line}.login-footer{font-size:12px;color:var(--muted)}.loading{max-width:800px;margin:auto;padding:80px 30px}.global-warning{padding:18px;background:#fff0dd;color:#613924;max-width:1000px;margin:auto}.modal{position:fixed;inset:0;background:#243d356e;z-index:100;padding:24px;display:grid;place-items:center;overflow:auto}.modal-inner{width:min(640px,100%);max-height:90vh;overflow:auto;background:var(--card);padding:26px;border-radius:18px;box-shadow:0 20px 80px #243d3530}.modal-inner h2{margin:0 0 15px;font-size:23px}.modal-inner .table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;font-size:13px;margin:12px 0}th,td{border:1px solid var(--line);padding:9px;text-align:left;vertical-align:top}th{background:var(--pale)}.empty{padding:30px;text-align:center;color:var(--muted)}#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);background:#243d35;color:white;padding:12px 20px;border-radius:10px;max-width:92vw;z-index:200;font-size:14px}.muted{color:var(--muted)}.mark{background:#e1ecbc;border-radius:3px;padding:0 2px}.calendar-row{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding:12px 0}.selected-text{color:var(--green);font-weight:650}.help-steps p{margin:18px 0}.select-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.select-row select{width:auto;min-width:120px}.mobile-label{display:none}.memory-table td{overflow-wrap:anywhere}.footer-note{font-size:12px;color:var(--muted);margin-top:28px}code{font-size:.95em;background:#eef2e6;padding:2px 5px;border-radius:4px}
@media(max-width:850px){.shell{grid-template-columns:170px minmax(0,1fr)}.sidebar{padding:28px 15px}.main{padding:23px 25px 60px}.two-col{grid-template-columns:1fr}.hero h1{font-size:31px}.plan-card{grid-template-columns:38px minmax(0,1fr)}.plan-card>.buttons{grid-column:2;margin-top:0}.login{gap:28px;padding:36px 24px}}
@media(max-width:620px){body{font-size:16px}.shell{display:block}.sidebar{position:fixed;top:auto;bottom:0;left:0;right:0;height:auto;border-right:0;border-top:1px solid var(--line);background:#fffefaee;backdrop-filter:blur(10px);padding:5px 10px calc(5px + env(safe-area-inset-bottom));z-index:50;display:block}.sidebar>.brand,.side-sub,.sidebar-foot{display:none}.navigation{flex-direction:row;justify-content:space-around;gap:0}.nav-btn{display:flex;flex-direction:column;gap:0;padding:4px 12px;font-size:11px;line-height:1.4;text-align:center}.nav-icon{font-size:20px}.main{padding:20px 17px 110px}.topline{font-size:11px;margin-bottom:23px;gap:6px;align-items:flex-start}.sync-pill{padding:5px 8px;max-width:190px;font-size:11px}.hero h1{font-size:29px}.hero p{font-size:14px}.stats{gap:8px;margin:18px 0}.stat{padding:12px 10px}.stat small{font-size:11px}.stat .num{font-size:25px}.panel{padding:19px;border-radius:15px}.panel h2{font-size:21px}.plan-card{gap:11px}.day-dot{width:34px;height:34px}.btn{padding:10px 12px;font-size:14px}.unit-grid{grid-template-columns:1fr}.word{font-size:32px;margin-top:26px}.prompt-sub{margin-bottom:26px}.study-head{font-size:12px}.answer-panel{padding:17px}.meaning{font-size:20px}.source{padding:13px}.source .en{font-size:17px}.rating-bar{gap:6px}.rating-bar .btn{font-size:13px;padding:12px 5px}.form-grid{grid-template-columns:1fr;gap:0}.modal{padding:12px}.modal-inner{padding:20px;max-height:88vh}.login{display:block;padding:28px 20px;min-height:100vh}.login h1{font-size:31px;margin:17px 0}.login .brand{margin-bottom:12px}.login .pitch{font-size:14px;margin-bottom:24px}.login .panel{padding:21px}.login .login-art{display:none}#toast{bottom:85px}.context-prompt{padding:15px;font-size:17px}.word-row{font-size:14px;padding:12px}.word-row .btn{flex-shrink:0}.select-row{display:grid;grid-template-columns:1fr 1fr}.select-row input{grid-column:1/-1}.select-row select{min-width:0;width:100%}.calendar-row{font-size:13px}}

.featured .btn:not(.primary){color:#edf2df;border-color:#90a995}.featured .fine{color:#dce7d9}