@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@400;500;600;700;800&family=Noto+Sans+SC:wght@400;500;600;700;800&display=swap');
:root{--ink:#182421;--muted:#6f7d78;--paper:#f5f7f2;--white:#fff;--line:#dfe6df;--teal:#0d6b61;--teal-dark:#0b5049;--mint:#d6f0e6;--yellow:#f6d36b;--coral:#e9795f;--ease:cubic-bezier(.23,1,.32,1)}
*{box-sizing:border-box}html{background:var(--paper)}body{margin:0;color:var(--ink);font-family:'Noto Sans SC',Manrope,system-ui,sans-serif;font-size:15px;line-height:1.65}a{color:inherit;text-decoration:none}.topbar{height:72px;border-bottom:1px solid var(--line);background:rgba(245,247,242,.92);display:flex;align-items:center;padding:0 5vw;gap:42px;position:sticky;top:0;z-index:10;backdrop-filter:blur(14px)}.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em}.brand-mark{display:grid;place-items:center;width:28px;height:28px;background:var(--teal);color:#fff;border-radius:8px;font-family:Georgia,serif;font-size:18px}.topnav{display:flex;gap:25px;height:100%;align-items:center}.topnav a{font-size:13px;color:var(--muted);height:100%;display:grid;place-items:center;border-bottom:2px solid transparent;transition:color 180ms ease-out,border-color 180ms ease-out}.topnav a:hover,.topnav a.active{color:var(--ink);border-color:var(--teal)}.user-menu{margin-left:auto;display:flex;gap:16px;align-items:center;font-size:13px}.text-link{color:var(--teal);font-weight:700}.shell{width:min(1160px,90vw);margin:0 auto;padding:66px 0 80px}.footer{width:min(1160px,90vw);margin:-35px auto 30px;color:#99a39e;font-size:12px}.footer span{padding:0 8px}.eyebrow{font:500 11px/1.2 'DM Mono',monospace;letter-spacing:.13em;color:var(--teal);margin-bottom:12px}.muted{color:var(--muted)}.small{font-size:12px}.flash{padding:12px 16px;border-left:3px solid var(--teal);background:#e8f4ef;margin-bottom:24px;font-size:13px}.flash.error{border-color:var(--coral);background:#fff0eb}.button{display:inline-flex;align-items:center;justify-content:center;gap:11px;border:1px solid transparent;border-radius:8px;padding:12px 18px;font-weight:700;font-size:13px;cursor:pointer;transition:transform 150ms ease-out,background-color 180ms ease-out,color 180ms ease-out,border-color 180ms ease-out}.button:active{transform:scale(.97)}.button.primary{background:var(--teal);color:#fff}.button.primary:hover{background:var(--teal-dark)}.button.ghost{background:transparent;border-color:var(--line)}.button.ghost:hover{border-color:var(--teal);color:var(--teal)}.button.light{background:#f8fbf8;color:var(--teal-dark)}.full-button{width:100%;margin-top:10px}.landing{min-height:calc(100vh - 72px);display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:8vw;width:min(1160px,90vw);margin:auto}.landing h1,.auth-aside h1{font-size:clamp(42px,6vw,76px);line-height:1.13;letter-spacing:-.055em;margin:0 0 24px;font-weight:800}.landing h1 em,.auth-aside h1 em{font-style:normal;color:var(--teal)}.landing-copy>p{font-size:17px;max-width:500px;color:var(--muted);margin:0 0 32px}.landing-actions{display:flex;gap:12px;flex-wrap:wrap}.landing-panel{background:var(--ink);color:#fff;padding:32px;border-radius:12px;box-shadow:16px 16px 0 var(--yellow)}.panel-kicker{font:500 11px 'DM Mono';color:#a9c3bb;letter-spacing:.1em;margin-bottom:26px}.path-item{display:grid;grid-template-columns:36px 1fr auto;align-items:center;gap:14px}.path-item>span{font:500 12px 'DM Mono';color:#76958c}.path-item strong{display:block;font-size:15px}.path-item small{color:#94aaa3;font-size:12px}.path-item b{color:var(--yellow);font-size:18px}.path-item.done strong{color:#d6f0e6}.path-line{width:1px;height:28px;background:#35524c;margin:8px 0 8px 18px}.auth-wrap{min-height:calc(100vh - 150px);display:grid;grid-template-columns:1fr 420px;gap:10vw;align-items:center}.auth-aside{padding-bottom:50px}.auth-aside h1{font-size:clamp(42px,5vw,68px)}.auth-aside p{max-width:430px;color:var(--muted);font-size:16px}.quote{border-left:2px solid var(--yellow);padding:5px 0 5px 16px;margin-top:40px;color:#566560;font-size:13px}.auth-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:34px;box-shadow:0 18px 45px rgba(29,57,48,.06)}.auth-tabs{display:flex;border-bottom:1px solid var(--line);gap:22px;margin-bottom:28px}.auth-tabs a{padding-bottom:12px;color:var(--muted);font-size:13px;border-bottom:2px solid transparent}.auth-tabs a.active{color:var(--ink);border-color:var(--teal);font-weight:700}.auth-card h2{font-size:25px;letter-spacing:-.03em;margin:0 0 7px}.stack-form{display:grid;gap:16px;margin-top:25px}.stack-form label,.form-grid label{display:grid;gap:7px;font-size:12px;font-weight:700;color:#43514c}.stack-form input,.stack-form select,.stack-form textarea,.form-grid input{font:inherit;font-weight:400;color:var(--ink);border:1px solid var(--line);background:#fbfcfa;border-radius:7px;padding:11px 12px;outline:none;transition:border-color 160ms ease-out,box-shadow 160ms ease-out}.stack-form input:focus,.stack-form select:focus,.stack-form textarea:focus,.form-grid input:focus{border-color:var(--teal);box-shadow:0 0 0 3px var(--mint)}.form-foot{margin:20px 0 0;color:var(--muted);font-size:12px;text-align:center}.page-head,.welcome-row{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:42px}.page-head h1,.welcome-row h1{font-size:42px;letter-spacing:-.055em;line-height:1.2;margin:0}.page-head p,.welcome-row p{margin:10px 0 0}.wave{font-size:23px;color:var(--yellow);vertical-align:12px}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:70px}.stat-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:21px 22px;min-height:126px}.stat-card span{display:block;color:var(--muted);font-size:12px}.stat-card strong{display:block;font-size:38px;letter-spacing:-.06em;line-height:1.2;margin-top:8px}.stat-card small{font-size:11px;color:var(--muted)}.stat-card.accent{background:var(--mint);border-color:var(--mint)}.stat-card.accent strong{color:var(--teal)}.stat-card.dark{background:var(--ink);border-color:var(--ink);color:#fff}.stat-card.dark span,.stat-card.dark small{color:#9db5ad}.stat-card.dark strong{color:var(--yellow)}.section-block{margin-top:56px}.section-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.section-title h2{font-size:23px;letter-spacing:-.03em;margin:0}.chapter-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.chapter-card{display:grid;grid-template-columns:50px 1fr auto;align-items:center;gap:17px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px;transition:transform 180ms var(--ease),border-color 180ms ease-out,box-shadow 180ms ease-out}.chapter-card:hover{transform:translateY(-3px);border-color:#a7c7bd;box-shadow:0 10px 24px rgba(17,57,48,.06)}.chapter-number{font:500 13px 'DM Mono';color:var(--teal)}.chapter-card h3{margin:0;font-size:16px}.chapter-card p{margin:4px 0 0;color:var(--muted);font-size:12px}.arrow{font-size:20px;color:var(--teal)}.split-block{display:grid;grid-template-columns:1.2fr .8fr;gap:12px}.focus-banner{border-radius:11px;padding:31px;background:var(--teal);color:#fff;display:flex;justify-content:space-between;overflow:hidden}.focus-banner h2{font-size:28px;line-height:1.25;letter-spacing:-.04em;margin:0 0 12px}.focus-banner p{color:#c4e4da;max-width:330px;font-size:13px;margin:0 0 22px}.focus-banner .eyebrow{color:#b7e6d8}.orbital{width:145px;height:145px;border:1px solid rgba(255,255,255,.28);border-radius:50%;display:grid;place-items:center;position:relative;align-self:center;margin-right:10px}.orbital:before,.orbital:after{content:'';position:absolute;border:1px solid rgba(255,255,255,.25);border-radius:50%;inset:17px;transform:rotate(37deg)}.orbital:after{inset:36px;transform:rotate(-37deg)}.orbital span{font:700 24px 'DM Mono';color:var(--yellow)}.orbital i{position:absolute;width:7px;height:7px;border-radius:50%;background:var(--yellow);top:8px;left:45px}.orbital i+ i{top:auto;left:auto;right:9px;bottom:36px;background:#fff}.recent-panel{background:var(--yellow);border-radius:11px;padding:31px}.recent-panel p{font-size:14px;line-height:1.8;margin:0 0 22px}.tip-line{border-top:1px solid rgba(24,36,33,.18);padding-top:15px;font-size:12px;font-weight:700}.tip-line span{margin-right:8px}.mode-switch,.filter-tabs{display:flex;gap:5px;border-bottom:1px solid var(--line);margin-bottom:25px}.mode-switch a,.filter-tabs a{padding:10px 14px;font-size:12px;color:var(--muted);border-bottom:2px solid transparent}.mode-switch a.active,.filter-tabs a.active{color:var(--ink);border-color:var(--teal);font-weight:700}.chapter-strip{display:flex;gap:10px;overflow:auto;padding-bottom:25px;margin-bottom:4px}.chapter-chip{min-width:190px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px;display:grid;grid-template-columns:32px 1fr;gap:2px 8px}.chapter-chip span{grid-row:span 2;font:500 12px 'DM Mono';color:var(--teal)}.chapter-chip strong{font-size:13px}.chapter-chip small{color:var(--muted);font-size:11px}.chapter-chip.selected{background:var(--mint);border-color:#9bcec0}.practice-meta{display:flex;justify-content:space-between;color:var(--muted);font:500 11px 'DM Mono';letter-spacing:.03em;margin-bottom:14px}.question-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:27px 30px;margin-bottom:13px}.question-heading,.review-top{display:flex;gap:10px;align-items:center;margin-bottom:19px}.q-index{font:500 12px 'DM Mono';color:var(--teal)}.tag{background:#edf2ef;border-radius:20px;padding:4px 9px;font-size:11px;color:#557069}.question-card h2{font-size:18px;line-height:1.7;margin:0 0 23px;letter-spacing:-.02em}.option-list{display:grid;gap:9px}.option{display:flex;align-items:center;gap:11px;border:1px solid var(--line);padding:12px 14px;border-radius:7px;cursor:pointer;font-size:14px;transition:border-color 160ms ease-out,background-color 160ms ease-out}.option:hover{border-color:#91beb2}.option input{position:absolute;opacity:0}.option:has(input:checked){border-color:var(--teal);background:#eef8f3}.option-key{font:500 12px 'DM Mono';color:var(--teal);width:20px}.answer-input{width:100%;border:0;border-bottom:1px solid var(--line);padding:12px 0;font:inherit;outline:none}.answer-input:focus{border-color:var(--teal)}.hint{font-size:11px;color:#98a39f;margin-top:9px}.submit-practice{margin-top:8px}.result-summary{display:flex;align-items:baseline;gap:10px;background:var(--ink);color:#fff;padding:25px 28px;border-radius:10px;margin-bottom:18px}.result-summary strong{color:var(--yellow);font:700 42px 'DM Mono'}.result-summary span{color:#bed0ca;font-size:13px}.result-bar{margin-left:auto;width:40%;height:6px;background:#35524c;border-radius:3px;overflow:hidden}.result-bar i{display:block;height:100%;background:var(--yellow)}.review-card{background:#fff;border:1px solid var(--line);border-left:3px solid var(--teal);border-radius:9px;padding:22px 25px;margin-bottom:12px}.review-card.is-wrong{border-left-color:var(--coral)}.review-top b{margin-left:auto;font-size:12px;color:var(--teal)}.is-wrong .review-top b{color:var(--coral)}.review-card h3{font-size:16px;line-height:1.7;margin:0 0 10px}.answer-line{font-size:12px;color:var(--muted);margin:0}.explanation{margin-top:17px;border-top:1px solid var(--line);padding-top:14px;font-size:13px}.explanation span{font-size:11px;color:var(--teal);font-weight:700;margin-right:9px}.wrong-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.wrong-card{background:#fff;border:1px solid var(--line);border-radius:9px;padding:21px}.wrong-card h3{font-size:15px;line-height:1.65;margin:0 0 7px}.wrong-count{margin-left:auto;color:var(--coral);font-size:11px}.wrong-foot{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:13px;margin-top:17px;color:#9aa49f;font-size:11px}.wrong-foot a{color:var(--teal);font-weight:700}.empty-state{text-align:center;padding:74px 20px;border:1px dashed #cbd7d0;border-radius:10px}.empty-icon{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--mint);color:var(--teal);font-size:21px;margin:0 auto 15px}.empty-state h2{font-size:20px;margin:0 0 7px}.empty-state p{color:var(--muted);font-size:13px;margin:0 0 22px}.install-page{min-height:100vh;display:grid;place-items:center;padding:30px}.install-card{width:min(650px,100%);background:#fff;border:1px solid var(--line);border-radius:12px;padding:38px}.install-card h1{font-size:34px;letter-spacing:-.05em;margin:0 0 10px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:25px}.form-grid .full{grid-column:1/-1}.form-divider{font:500 11px 'DM Mono';color:var(--teal);letter-spacing:.1em;border-bottom:1px solid var(--line);padding-bottom:10px;margin-top:8px}.install-note{font-size:11px;color:#9aa49f;margin:22px 0 0}.admin-layout{display:grid;grid-template-columns:205px 1fr;gap:46px}.admin-sidebar{border-right:1px solid var(--line);padding-right:20px}.sidebar-label{font:500 10px 'DM Mono';color:#9aa49f;letter-spacing:.11em;margin-bottom:16px}.admin-sidebar a{display:flex;justify-content:space-between;padding:11px 12px;border-radius:7px;color:var(--muted);font-size:13px;margin-bottom:3px}.admin-sidebar a span{font-size:16px;opacity:.7}.admin-sidebar a:hover,.admin-sidebar a.active{background:var(--mint);color:var(--teal);font-weight:700}.admin-content{min-width:0}.page-head.compact{margin-bottom:30px}.admin-stats{margin-bottom:35px}.admin-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:25px}.admin-columns{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-bottom:13px}.card-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.card-title h2{font-size:17px;margin:0}.table-card{overflow:auto}table{width:100%;border-collapse:collapse;min-width:530px}th,td{text-align:left;padding:13px 10px;border-bottom:1px solid var(--line);font-size:12px}th{color:#92a09a;font-weight:600;font-size:11px}tr:last-child td{border-bottom:0}.generate-layout{display:grid;grid-template-columns:1fr 1fr;gap:13px}.generate-intro{background:var(--ink);color:#fff;border-radius:10px;padding:32px;min-height:355px}.ai-symbol{color:var(--yellow);font-size:28px;margin-bottom:25px}.generate-intro h2{font-size:28px;line-height:1.35;letter-spacing:-.04em;margin:0 0 16px}.generate-intro p{color:#a9c3bb;font-size:13px;max-width:330px}.mini-note{border-top:1px solid #35524c;margin-top:30px;padding-top:17px;color:#c9d8d3;font-size:12px;line-height:2.1}.mini-note span{font:500 11px 'DM Mono';color:var(--yellow);margin-right:12px}.generate-card{display:flex;align-items:center}.rule-preview{font-size:12px;color:var(--muted);background:#f3f7f3;border-radius:7px;padding:13px;line-height:1.65}.rule-preview span{display:block;font:500 10px 'DM Mono';color:var(--teal);margin-bottom:5px}.status-pill{font-size:11px;border-radius:20px;padding:4px 9px;background:#edf2ef;color:#65736d}.status-pill.pending{background:#fff4d8;color:#99751b}.status-pill.published{background:var(--mint);color:var(--teal)}.status-pill.rejected{background:#ffede8;color:#ad5e4b}.review-admin-list{display:grid;gap:12px}.admin-question{background:#fff;border:1px solid var(--line);border-radius:9px;padding:23px}.admin-question h3{font-size:16px;line-height:1.7;margin:0 0 7px}.admin-question .status-pill{margin-left:auto}.admin-actions{display:flex;gap:8px;margin-top:18px;padding-top:15px;border-top:1px solid var(--line)}.small-button{padding:8px 13px;font-size:12px}.compact-empty{padding:50px}.quick-actions{margin-top:20px}.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.quick-grid a{border:1px solid var(--line);padding:17px;border-radius:8px;transition:border-color 160ms ease-out,transform 160ms ease-out}.quick-grid a:hover{border-color:#99c4b6;transform:translateY(-2px)}.quick-grid span{display:block;color:var(--teal);font-size:20px;margin-bottom:8px}.quick-grid strong,.quick-grid small{display:block}.quick-grid strong{font-size:13px}.quick-grid small{font-size:11px;color:var(--muted);margin-top:3px}.settings-card{max-width:670px}
@media (max-width:850px){.topbar{padding:0 5vw;gap:20px}.topnav{display:none}.shell{padding-top:42px}.landing,.auth-wrap{grid-template-columns:1fr;gap:35px;padding:55px 0}.landing-panel{max-width:520px}.auth-aside{padding:0}.auth-aside h1{font-size:48px}.stat-grid{grid-template-columns:repeat(2,1fr);margin-bottom:45px}.split-block,.generate-layout,.admin-columns{grid-template-columns:1fr}.admin-layout{grid-template-columns:1fr;gap:25px}.admin-sidebar{border-right:0;border-bottom:1px solid var(--line);padding:0 0 12px;display:flex;gap:4px;overflow:auto}.admin-sidebar .sidebar-label{display:none}.admin-sidebar a{white-space:nowrap}.page-head h1,.welcome-row h1{font-size:34px}.quick-grid{grid-template-columns:1fr 1fr}.wrong-grid,.chapter-grid{grid-template-columns:1fr}}
@media (max-width:560px){.topbar{height:62px}.brand{font-size:13px}.user-menu span{display:none}.landing h1{font-size:43px}.landing-panel{padding:25px;box-shadow:9px 9px 0 var(--yellow)}.page-head,.welcome-row{display:block}.page-head .button,.welcome-row .button{margin-top:20px}.stat-grid{gap:8px}.stat-card{padding:16px;min-height:105px}.stat-card strong{font-size:30px}.section-block{margin-top:40px}.chapter-card{padding:16px}.focus-banner{padding:24px}.focus-banner h2{font-size:23px}.orbital{width:100px;height:100px;margin-right:-14px}.question-card{padding:20px 17px}.question-card h2{font-size:16px}.result-summary{padding:19px}.result-bar{width:32%}.wrong-card{padding:17px}.auth-card{padding:24px}.form-grid{grid-template-columns:1fr}.form-grid .full{grid-column:auto}.install-card{padding:26px 20px}.quick-grid{grid-template-columns:1fr}.footer{margin-top:-20px}}
@media (prefers-reduced-motion:reduce){*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}
.toggle-row{display:flex!important;grid-template-columns:none!important;align-items:flex-start;gap:10px}.toggle-row input{width:17px;height:17px;margin-top:2px;accent-color:var(--teal)}.toggle-row span{display:grid;gap:2px}.toggle-row small{font-weight:400;color:var(--muted)}.student-custom{max-width:900px}
.student-quick-link{width:min(1160px,90vw);margin:14px auto -35px;font-size:12px}.student-quick-link a{display:inline-flex;gap:10px;align-items:center;color:var(--teal);font-weight:700}.student-quick-link span{color:var(--muted);font-weight:400}.custom-question-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}@media (max-width:560px){.student-quick-link{margin:10px auto -20px}.student-quick-link span{display:none}.custom-question-grid{grid-template-columns:1fr}}
.geetest-box{min-height:44px;margin-bottom:2px}.auth-card form .geetest-box:empty{display:none}
.mode-switch a[href="index.php?page=practice&mode=ai"]{display:none}@media (max-width:850px){.topnav{display:flex;flex:1;overflow-x:auto;gap:15px}.topnav a{white-space:nowrap;font-size:12px}.user-menu{display:none}}