:root{--navy:#11283c;--deep:#0a1b2b;--ink:#1a2d39;--muted:#657681;--teal:#087b78;--teal-dark:#076966;--mint:#d8f0eb;--gold:#e1b55e;--paper:#f6f7f4;--white:#fff;--line:#e2e9e6;--radius:20px;--shadow:0 8px 28px rgba(16,43,55,.045);font-family:'Noto Sans Thai',system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--paper);font-size:15px}
*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button{cursor:pointer}a{color:var(--teal-dark);text-underline-offset:3px}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #db9c38;outline-offset:3px}.loading{padding:4rem;text-align:center}.app-shell{min-height:100vh;display:grid;grid-template-columns:250px minmax(0,1fr)}
.sidebar{background:var(--navy);color:#d6e4e7;padding:30px 19px 22px;display:flex;flex-direction:column;min-height:100vh;position:sticky;top:0;height:100vh;overflow:auto}.brand{display:flex;gap:12px;align-items:center;padding:0 3px 27px;border-bottom:1px solid rgba(255,255,255,.11)}.brand-mark{height:41px;width:41px;display:grid;place-items:center;border:1px solid rgba(246,225,173,.55);color:#edd29c;border-radius:12px;background:rgba(255,255,255,.035);flex:none}.brand-mark svg{height:25px;width:25px}.brand strong{display:block;font-size:14px;line-height:1.35;color:#fff}.brand small{font-size:10px;letter-spacing:.13em;color:#a9c1c6;font-weight:700}.nav-label{font-size:10px;letter-spacing:.14em;color:#8daab3;font-weight:700;margin:28px 12px 10px}.nav{display:grid;gap:4px}.nav-btn{display:flex;align-items:center;gap:11px;width:100%;border:0;background:transparent;color:#b7ccd1;text-align:left;padding:11px 12px;border-radius:10px;font-size:13px;font-weight:600}.nav-btn svg{height:18px;width:18px;flex:none;stroke-width:1.7}.nav-btn:hover,.nav-btn.active{background:#244357;color:#fff}.nav-btn.active{box-shadow:inset 3px 0 var(--gold)}.side-bottom{margin-top:auto;padding:22px 12px 1px;font-size:11px;line-height:1.75;color:#9cb3ba}.side-bottom strong{display:block;color:#e4d7b9;font-weight:600}.side-progress{height:4px;background:#385363;border-radius:99px;overflow:hidden;margin:10px 0}.side-progress i{display:block;background:#d8b76f;height:100%;transition:width .25s}
.mobilebar{display:none}.main{min-width:0}.topbar{height:74px;background:rgba(255,255,255,.83);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 clamp(24px,4vw,66px);gap:20px}.topbar-left{font-size:12px;color:#73858d}.topbar-left b{color:#213c47}.top-status{font-size:11px;font-weight:600;color:#54716f;display:flex;align-items:center;gap:7px}.status-dot{width:7px;height:7px;border-radius:50%;background:#33a48a}.content{max-width:1350px;margin:auto;padding:38px clamp(24px,4vw,66px) 72px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--teal);font-size:10px;letter-spacing:.12em;font-weight:800;text-transform:uppercase}.eyebrow .line{display:block;width:24px;height:2px;background:var(--teal)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(28px,3vw,43px);line-height:1.3;letter-spacing:-.035em;margin:10px 0 12px;font-weight:800}h2{font-size:20px;line-height:1.4;letter-spacing:-.02em;margin-bottom:6px}h3{font-size:15px;line-height:1.5;margin-bottom:6px}.muted{color:var(--muted)}.small{font-size:12px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:15px;margin-bottom:18px}.section-head p{margin:0;color:var(--muted);font-size:12px}.section{margin-top:39px}
.hero{min-height:275px;position:relative;border-radius:22px;overflow:hidden;background:linear-gradient(117deg,#112b3d 0%,#163d4b 63%,#1e5a5c 100%);padding:38px 40px;color:#fff;display:flex;align-items:center;box-shadow:0 16px 40px rgba(19,51,61,.12)}.hero:before,.hero:after{content:"";position:absolute;border:1px solid rgba(184,231,219,.13);border-radius:50%;width:390px;height:390px;right:-30px;top:-60px}.hero:after{width:278px;height:278px;right:26px;top:-4px}.hero-content{position:relative;z-index:2;max-width:660px}.hero .eyebrow{color:#a8d8c9}.hero .eyebrow .line{background:#a8d8c9}.hero h1{font-size:clamp(28px,3vw,40px);margin:13px 0 10px}.hero h1 span{color:#e4c485}.hero p{font-size:14px;max-width:580px;color:#c9dcda;line-height:1.9;margin-bottom:21px}.hero-emblem{position:absolute;right:6%;top:48%;transform:translateY(-50%);width:160px;height:160px;border:1px solid rgba(255,255,255,.15);border-radius:50%;display:grid;place-items:center;color:rgba(210,235,223,.32)}.hero-emblem svg{width:100px;height:100px;stroke-width:.75}.hero-emblem:before{content:"";position:absolute;inset:14px;border-radius:50%;border:1px dashed rgba(255,255,255,.18)}
.btn{border:1px solid transparent;border-radius:10px;padding:11px 16px;font-size:13px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;min-height:44px}.btn svg{width:16px;height:16px}.btn-primary{background:var(--teal);color:#fff}.btn-primary:hover{background:var(--teal-dark)}.btn-gold{background:#f0d69c;color:#263a3c}.btn-gold:hover{background:#f8e3b9}.btn-outline{background:#fff;border-color:#d8e4e0;color:#38545c}.btn-outline:hover{border-color:#9abcb4}.btn-ghost{background:transparent;border-color:rgba(255,255,255,.3);color:#fff}.btn-ghost:hover{background:rgba(255,255,255,.08)}.btn:disabled{opacity:.5;cursor:not-allowed}.button-row{display:flex;align-items:center;flex-wrap:wrap;gap:10px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}.stat{background:#fff;border:1px solid var(--line);border-radius:15px;padding:17px 19px;display:flex;gap:13px;align-items:center;box-shadow:var(--shadow)}.stat-icon{width:40px;height:40px;display:grid;place-items:center;border-radius:12px;background:#eaf5f1;color:var(--teal);flex:none}.stat-icon svg{width:20px;height:20px}.stat small{color:#75868b;font-size:11px}.stat strong{display:block;font-size:19px;line-height:1.25;margin-top:3px}.stat strong span{font-size:12px;color:#94a2a2;font-weight:500}.progress{height:6px;background:#e8efec;border-radius:99px;overflow:hidden}.progress>span{height:100%;display:block;background:var(--teal);border-radius:99px}.progress-copy{display:flex;justify-content:space-between;font-size:11px;color:#72847f;margin-bottom:7px}
.path-note{display:flex;align-items:flex-start;gap:12px;background:#edf5f2;border:1px solid #d8ebe4;border-radius:14px;padding:15px 18px;color:#3b615c;font-size:12px;line-height:1.7}.path-note svg{width:18px;height:18px;flex:none;margin-top:1px}.path-note p{margin:0}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.lesson-card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px;display:flex;gap:14px;width:100%;text-align:left;color:var(--ink);transition:border-color .15s,transform .15s,box-shadow .15s}.lesson-card:hover{border-color:#a6c9be;transform:translateY(-2px);box-shadow:var(--shadow)}.lesson-no{font-family:'Outfit',sans-serif;font-size:15px;color:var(--teal);font-weight:700;background:#eaf5f1;border-radius:10px;width:39px;height:39px;display:grid;place-items:center;flex:none}.lesson-card h3{font-size:13px;margin:0 0 5px}.lesson-card p{color:#7c8c8d;font-size:11px;margin:0;line-height:1.7}.lesson-card .right{margin-left:auto;display:flex;flex-direction:column;align-items:end;gap:10px;flex:none}.arrow{color:#8ca8a4;font-size:20px;line-height:1}.pill{display:inline-flex;align-items:center;gap:4px;white-space:nowrap;border-radius:99px;padding:4px 8px;font-size:10px;font-weight:700;background:#f1f5f3;color:#718580}.pill.done{background:#e2f2e9;color:#25815f}.pill.part{background:#fff4df;color:#9a6b20}.group-title{font-size:13px;font-weight:800;color:#41595b;margin:25px 0 12px}.group-title span{font-family:'Outfit',sans-serif;color:#94aaa4;margin-right:8px}
.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:24px;align-items:start}.lesson-main{min-width:0}.back-link{border:0;background:none;padding:0;color:#68817f;font-size:12px;font-weight:700;display:inline-flex;align-items:center;gap:6px;margin:0 0 24px}.back-link:hover{color:var(--teal)}.back-link svg{width:15px;height:15px}.lesson-heading h1{font-size:clamp(27px,2.8vw,36px);margin:10px 0 9px}.lesson-heading p{color:#6f8187;line-height:1.8;font-size:13px;max-width:740px}.meta{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0 24px}.meta span{font-size:11px;color:#607879;background:#eaf0ed;border-radius:99px;padding:6px 10px}.panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;margin-top:16px;box-shadow:var(--shadow)}.panel-title{display:flex;align-items:center;gap:10px;margin-bottom:16px}.panel-title h2{font-size:17px;margin:0}.panel-icon{display:grid;place-items:center;width:35px;height:35px;border-radius:10px;background:#e8f5f1;color:var(--teal);flex:none}.panel-icon svg{width:18px;height:18px}.key-list{list-style:none;margin:0;padding:0;display:grid;gap:15px}.key-list li{display:flex;gap:12px;line-height:1.85;font-size:13px;color:#40545c}.key-list li:before{content:'✓';display:grid;place-items:center;color:var(--teal);background:#e9f4f0;flex:none;width:21px;height:21px;border-radius:50%;font-size:12px;font-weight:800;margin-top:1px}.example{background:#f8faf9;border-left:3px solid #dfbd77;border-radius:2px 12px 12px 2px;padding:17px 18px;margin-top:20px}.example h3{color:#475e5b;margin-bottom:5px}.example p,.evidence p{font-size:13px;color:#53676a;line-height:1.9;margin:0}.evidence{margin-top:18px}.evidence h3{color:#3b565a}.evidence .small{font-size:11px;color:#82918f}.section-tag{display:inline-flex;border-radius:99px;background:#eaf5f1;color:var(--teal);font-size:10px;font-weight:800;padding:5px 10px;margin-bottom:10px}
.aside-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:19px;position:sticky;top:25px}.aside-card h3{font-size:13px;margin-bottom:14px}.aside-card ol{list-style:none;margin:0;padding:0;display:grid;gap:13px}.aside-card li{display:flex;gap:9px;font-size:11px;color:#6f8282;line-height:1.5}.step-dot{width:18px;height:18px;display:grid;place-items:center;background:#edf4f1;border-radius:50%;font-size:10px;color:var(--teal);font-weight:700;flex:none}.aside-card hr{border:0;border-top:1px solid var(--line);margin:18px 0}.aside-card a{font-size:11px;line-height:1.6}.aside-card p{font-size:11px;line-height:1.8;color:#7d8f8c;margin:10px 0 0}
.question{padding:20px 0;border-top:1px solid #edf1ef}.question:first-of-type{border-top:0;padding-top:0}.question:last-of-type{padding-bottom:12px}.question-title{font-size:13px;font-weight:700;line-height:1.7;margin:0 0 11px}.question-title b{color:var(--teal);margin-right:6px}.choices{display:grid;gap:7px}.choice{display:flex;gap:10px;align-items:flex-start;border:1px solid #e4ece8;border-radius:10px;padding:10px 12px;font-size:12px;color:#4a5e63;line-height:1.65;cursor:pointer}.choice:hover{background:#f8fbfa;border-color:#b6d7cd}.choice input{accent-color:var(--teal);margin:3px 0 0;flex:none}.choice.right-answer{border-color:#98d4bb;background:#effaf4}.choice.wrong-answer{border-color:#e9b7ac;background:#fff5f2}.explanation{margin:10px 0 0;padding:11px 13px;border-radius:9px;background:#f1f7f5;color:#42675e;font-size:11px;line-height:1.8}.explanation.incorrect{background:#fff4ef;color:#95624c}.result{background:#eef8f2;border:1px solid #d3ebdb;border-radius:11px;padding:13px 15px;margin:15px 0;color:#2d7352;font-size:12px;line-height:1.8}.notice{font-size:11px;color:#849391;line-height:1.7;margin:11px 0 0}.notice.error{color:#af4a3d}.homework-prompt{background:#fff8eb;border:1px solid #f0e3c9;border-radius:12px;padding:15px 16px;color:#6f5b36;line-height:1.85;font-size:13px;margin-bottom:14px}.homework-label{display:block;font-size:12px;font-weight:700;margin-bottom:7px}.textarea{display:block;width:100%;resize:vertical;min-height:165px;padding:13px;border:1px solid #dbe6e1;border-radius:10px;color:var(--ink);background:#fff;line-height:1.8;font-size:13px}.textarea::placeholder{color:#a7b4b1}.nav-bottom{display:flex;justify-content:space-between;gap:10px;margin-top:24px}.nav-bottom .btn{max-width:50%}.bottom-finish{padding:18px;border:1px solid #d5e8e1;background:#f1f8f5;border-radius:12px;margin-top:16px}.bottom-finish p{font-size:11px;color:#6f8580;margin:8px 0 0;line-height:1.7}
.page-intro{max-width:750px;margin-bottom:25px}.page-intro h1{font-size:clamp(27px,3vw,36px)}.page-intro p{font-size:13px;color:var(--muted);line-height:1.9}.source-box{background:#fdf7e9;border:1px solid #f0e4c7;border-radius:14px;padding:17px 19px;color:#76653f;font-size:12px;line-height:1.9;margin-top:20px}.source-box p{margin:0}.source-list{display:grid;gap:12px}.source-item{padding:18px;border:1px solid var(--line);border-radius:13px}.source-item h3{margin:0 0 5px}.source-item p{font-size:12px;line-height:1.8;color:var(--muted);margin:0 0 8px}.homework-item{padding:16px 0;border-top:1px solid var(--line)}.homework-item:first-child{border-top:0;padding-top:0}.homework-item p{color:#5c6f70;font-size:12px;line-height:1.9;white-space:pre-wrap;margin:6px 0}.homework-item button{border:0;padding:0;background:none;text-align:left;color:var(--teal-dark);font-weight:700}.empty{color:#9aa9a5;font-size:12px}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:12px 18px;background:#143b3d;color:#fff;border-radius:11px;z-index:50;box-shadow:0 8px 24px #102a2c33;font-size:12px;white-space:normal;max-width:90vw}.footer{text-align:center;color:#9aa9a5;font-size:10px;padding:25px 0 0;line-height:1.8}
@media(max-width:1050px){.app-shell{grid-template-columns:215px minmax(0,1fr)}.sidebar{padding-left:14px;padding-right:14px}.hero-emblem{right:3%;opacity:.55}.hero-content{max-width:75%}.lesson-layout{grid-template-columns:minmax(0,1fr)}.aside-card{position:static;display:none}}
@media(max-width:760px){.app-shell{display:block}.sidebar{display:none}.mobilebar{display:block;background:var(--navy);color:#fff;position:sticky;top:0;z-index:20;box-shadow:0 3px 12px #0f293322}.mobile-brand{display:flex;align-items:center;gap:10px;padding:13px 16px 8px;font-size:13px;font-weight:800}.mobile-brand .brand-mark{height:32px;width:32px;border-radius:9px}.mobile-brand .brand-mark svg{height:20px;width:20px}.mobile-nav{display:flex;overflow:auto;gap:4px;padding:0 10px 8px;scrollbar-width:none}.mobile-nav::-webkit-scrollbar{display:none}.mobile-nav button{border:0;white-space:nowrap;color:#bed1d1;background:transparent;border-radius:8px;padding:8px 10px;font-size:11px;font-weight:600}.mobile-nav button.active{background:#28475a;color:#fff}.topbar{height:auto;min-height:43px;padding:10px 18px}.topbar-left{font-size:10px}.top-status{font-size:10px}.content{padding:23px 16px 48px}.hero{padding:25px;min-height:225px;border-radius:17px}.hero h1{font-size:28px}.hero p{font-size:12px}.hero-content{max-width:100%}.hero-emblem{right:-30px;opacity:.16}.hero:before,.hero:after{opacity:.5}.stats{gap:7px;margin-top:10px}.stat{display:block;padding:12px 10px}.stat-icon{width:29px;height:29px;border-radius:9px;margin-bottom:7px}.stat-icon svg{width:16px;height:16px}.stat small{font-size:9px}.stat strong{font-size:16px}.stat strong span{font-size:10px}.section{margin-top:30px}.cards{grid-template-columns:1fr;gap:8px}.lesson-card{padding:14px}.lesson-card h3{font-size:12px}.panel{padding:18px;border-radius:15px}.panel-title h2{font-size:15px}.lesson-heading h1{font-size:27px}.topbar-left b{display:none}.nav-bottom .btn{font-size:11px;padding:9px}.source-box{font-size:11px}.section-head{align-items:start}.footer{padding-top:20px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.deep-panel{border-top:3px solid #178977}.deep-intro,.scenario-intro{font-size:13px;line-height:1.9;color:#52696b;margin:0 0 18px}.clause-list{display:grid;gap:12px}.clause{padding:16px 18px;border:1px solid #e3ece8;background:#fbfdfc;border-radius:12px}.clause-ref{display:inline-block;color:#087b78;background:#e7f4ef;border-radius:6px;padding:3px 8px;font-size:11px;font-weight:800;margin-bottom:8px}.clause h3,.practice h3{font-size:13px;color:#284b4c;margin:0 0 7px}.clause p,.practice p{font-size:13px;line-height:1.95;color:#4d6266;margin:0}.practice-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}.practice{background:#f1f7f5;border-radius:12px;padding:17px}.practice:nth-child(2){background:#f6f5ee}.deep-note{background:#fff8e9;border-left:3px solid #e1bc6c;color:#6e5e3e;padding:14px 16px;border-radius:4px 10px 10px 4px;margin-top:16px;font-size:12px;line-height:1.9}@media(max-width:760px){.practice-grid{grid-template-columns:1fr}.clause{padding:14px}.clause p,.practice p{font-size:12px}}
.inspection{border-top:3px solid #d6ab5e}.inspection-figure{margin:0 0 21px}.inspection-art{width:100%;max-width:620px;aspect-ratio:4/3;background-image:url('inspection-scenarios.jpg');background-repeat:no-repeat;background-size:400% 400%;background-position:var(--art-x) var(--art-y);border-radius:12px;border:1px solid #e4eee9;background-color:#e9f4ef}.inspection-figure figcaption{font-size:10px;color:#81918d;margin-top:7px;line-height:1.6}.case-heading span{font-size:10px;font-weight:800;letter-spacing:.02em;color:#087b78}.case-heading h3{font-size:16px;color:#203e45;margin:7px 0}.case-heading p,.case-question p,.sample-heading p{font-size:12px;line-height:1.9;color:#506667;margin:0}.case-question{background:#edf6f4;border-radius:11px;padding:13px 15px;margin:15px 0;color:#24685e;font-size:12px}.case-question p{margin-top:3px}.sample-heading{margin:22px 0 12px}.sample-heading h3{font-size:14px;margin:0 0 4px}.sample-heading p{color:#879592;font-size:11px}.mock-docs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;align-items:start}.mock-doc{border:1px solid #dfe8e5;border-radius:10px;overflow:hidden;background:#fff}.mock-doc>summary{cursor:pointer;padding:12px 14px;color:#264c4a;font-weight:700;font-size:12px;line-height:1.6;background:#f6faf8}.mock-document{padding:14px;background:#fff;min-width:0}.mock-banner{padding:6px 8px;color:#a85142;background:#fff2ef;font-size:10px;font-weight:700;text-align:center;border-radius:5px;line-height:1.5}.mock-kind{font-size:9px;letter-spacing:.05em;color:#7c9391;margin-top:14px;font-weight:700}.mock-document h4{font-size:12px;color:#233d43;line-height:1.5;margin:6px 0 12px}.mock-document dl{margin:0}.mock-document dl>div{border-top:1px solid #eaf0ed;padding:8px 0}.mock-document dt{font-size:10px;color:#80908e;margin-bottom:2px}.mock-document dd{margin:0;color:#3e565a;font-size:11px;line-height:1.7}.inspection-answer{margin-top:16px;border-radius:11px;border:1px solid #cce5d9;background:#f4faf6}.inspection-answer>summary{cursor:pointer;padding:14px 16px;font-size:13px;font-weight:800;color:#226348}.answer-body{padding:0 16px 16px}.answer-body h4{font-size:12px;margin:14px 0 5px;color:#315e53}.answer-body p{font-size:12px;line-height:1.9;color:#526a66;margin:0}.answer-body .answer-note{border-top:1px solid #d8ebe2;padding-top:12px;margin-top:14px;color:#788e85;font-size:11px}@media(max-width:760px){.mock-docs{grid-template-columns:1fr}.inspection-art{border-radius:10px}.inspection-figure figcaption{font-size:10px}}

.link-btn{border:0;background:none;padding:0;color:var(--teal-dark);text-decoration:underline;text-underline-offset:3px;font:inherit;font-weight:600;cursor:pointer}