:root{--bg:#f8f7f3;--paper:#fff;--ink:#182321;--muted:#87908b;--line:#e5e7e0;--accent:#de6549;--accent-soft:#f9e8df;--mint:#e6f0e7;--green:#296756;--shadow:0 15px 42px rgba(26,37,34,.045)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,"Noto Sans Thai","Noto Sans JP","Noto Sans SC",sans-serif;-webkit-font-smoothing:antialiased}
button,input{font:inherit}button{cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}button:focus-visible,input:focus-visible{outline:3px solid #f6a58a;outline-offset:3px}
[hidden]{display:none!important}
.app{min-height:100vh}
.topbar{height:88px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 clamp(24px,5vw,90px);background:var(--bg)}
.brand{display:flex;align-items:center;gap:12px;font-size:19px;font-weight:750;letter-spacing:-.8px}
.brand-symbol{display:flex;justify-content:center;align-items:center;letter-spacing:-3px;padding-right:3px;background:var(--ink);color:#fff;border-radius:12px;width:44px;height:44px;font-size:23px;line-height:1;font-weight:750}
.brand-dot{color:#fa9279}
.topbar-right{display:flex;align-items:center;gap:38px}
.tiny{font-size:12px;line-height:1.6}.muted{color:var(--muted)}.text-button,.text-link{background:none;border:0;color:var(--ink);font-size:13px;font-weight:650;padding:9px 0}
.text-link{color:var(--green);margin-top:14px;text-decoration:underline;text-underline-offset:5px}
.layout{display:grid;grid-template-columns:240px minmax(0,1fr);max-width:1500px;margin:0 auto}
.sidebar{border-right:1px solid var(--line);padding:52px 25px 40px 42px;min-height:calc(100vh - 88px);display:flex;flex-direction:column}
.sidebar-label,.side-mini-label,.eyebrow,.micro-label,.grammar-label{font-weight:750;letter-spacing:1.6px;font-size:10px}
.sidebar-label{color:var(--muted);margin:0 0 25px 14px}
.sidebar-nav{display:flex;flex-direction:column;gap:4px}
.nav-link{border:0;border-radius:10px;background:transparent;text-align:left;display:grid;grid-template-columns:26px 1fr 14px;align-items:center;width:100%;padding:14px 13px;color:#7e8882;font-size:13px;font-weight:600}
.nav-link>span:first-child{font-size:10px;font-weight:750;letter-spacing:.5px}
.nav-link.active{background:#e9ede6;color:var(--ink)}
.nav-arrow{display:none}.nav-link.active .nav-arrow{display:block}
.sidebar-bottom{margin-top:auto;padding:60px 13px 0}
.side-mini-label{color:var(--muted);margin-bottom:13px}
.session-number{font-size:48px;font-weight:500;line-height:1.1;letter-spacing:-2px;font-variant-numeric:tabular-nums}
.session-divider{height:1px;background:var(--line);margin:23px 0}
.main{padding:40px clamp(24px,5vw,76px) 28px;min-width:0;max-width:1160px;width:100%;margin:0 auto}
.section-heading{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:54px}
.eyebrow{color:#8e958e}.language-toggle{border:1px solid var(--line);padding:4px;background:#efefe9;border-radius:999px;display:flex;gap:2px}
.language-toggle button{border:0;background:transparent;border-radius:999px;padding:11px 13px;white-space:nowrap;font-size:12px;font-weight:650;color:#7e8982;transition:background .15s}
.language-toggle button.selected{background:var(--paper);color:var(--ink);box-shadow:0 2px 8px #0000000b}
.language-toggle button span{font-size:9px;opacity:.65;margin-left:4px}
.hero{margin:0 0 64px}.hero h1{font-size:clamp(3.5rem,6.3vw,6.1rem);font-weight:620;letter-spacing:-5px;line-height:1.035;margin:0 0 20px}
.hero h1 em{font-family:Georgia,"Times New Roman",serif;font-weight:400;letter-spacing:-4px;color:var(--accent);font-style:italic}
.hero p{font-size:15px;color:#6f7973;line-height:1.75;max-width:490px;margin:0}
.workspace-heading,.feature-heading,.field-heading{display:flex;align-items:center;justify-content:space-between;gap:18px}
.workspace-heading{margin-bottom:15px}
.lesson-card{background:var(--paper);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}
.lesson-top{display:flex;justify-content:space-between;gap:24px;padding:30px 33px 24px}
.micro-label{color:#a0a8a2;letter-spacing:1.3px}
.lesson-top h2{margin:12px 0 7px;font-size:23px;font-weight:630;letter-spacing:-.65px;line-height:1.35}
.source-mask{font-size:20px;font-weight:600;letter-spacing:-.5px;color:#87948a;margin:13px 0 0}
.thai-source{margin:0;font-size:16px;color:#737d77}
.lesson-index{align-self:flex-start;font-size:10px;color:#9fa6a0;white-space:nowrap;font-weight:700;letter-spacing:1px}
.translation{background:#f2f5ef;padding:31px 33px 33px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.target-row{display:flex;align-items:center;justify-content:space-between;gap:16px}
.target-row h3{font-size:clamp(1.7rem,3.3vw,3rem);font-weight:550;letter-spacing:-1px;line-height:1.42;margin:14px 0 0;overflow-wrap:anywhere}
.audio-btn{flex:none;background:var(--ink);color:white;width:52px;height:52px;border:0;border-radius:50%;font-size:25px;transition:transform .2s}
.audio-btn:hover{transform:scale(1.06)}
.reading{font-size:14px;color:#78837a;margin:10px 0 0;line-height:1.6}
.grammar-row{padding:21px 33px;display:flex;gap:21px;align-items:center;font-size:12px;color:#69746d;line-height:1.6}
.grammar-label{color:var(--accent);min-width:122px;font-size:9px}
.practice-modes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-bottom:1px solid var(--line);gap:18px;margin-top:48px}
.mode-btn{background:none;border:0;border-bottom:2px solid transparent;color:#929b93;padding:0 0 17px;text-align:left;font-size:13px;font-weight:630;white-space:nowrap}
.mode-btn span{font-size:10px;margin-right:9px;opacity:.65}
.mode-btn.active{border-color:var(--accent);color:var(--ink)}
.activity{padding:30px 0 14px;min-height:240px}
.activity-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:23px}
.activity-heading h3,.feature-heading h3{font-size:22px;font-weight:650;letter-spacing:-.8px;margin:9px 0 0;line-height:1.3}
.meaning-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.meaning-option{min-height:107px;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:21px 15px;text-align:left;display:flex;flex-direction:column;gap:10px;justify-content:space-between;color:var(--ink);font-size:15px;line-height:1.45}
.meaning-option .option-marker{color:#abb3aa;font-size:11px;font-weight:750}
.meaning-option:hover:not(:disabled){border-color:#bacbbf}
.meaning-option.correct{background:var(--mint);border-color:#b1d0b6}
.meaning-option.incorrect{background:#fff0ea;border-color:#f2ae99}
.activity-feedback,.inline-message{min-height:18px;margin:14px 0 0;font-size:12px;line-height:1.6;color:var(--green)}
.activity-feedback.error,.inline-message.error{color:#b24d36}
.next-row{display:flex;justify-content:flex-end;border-bottom:1px solid var(--line);padding:7px 0 34px}
.next-btn{font-size:13px;font-weight:700;color:var(--green);border:0;background:none;padding:12px 0}
.next-btn span{margin-left:8px}
.featured-section{margin-top:55px}.feature-heading{margin-bottom:22px}.small-count{font-size:12px;color:#9ca59d}
.featured-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.featured-item{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:21px;text-align:left;display:flex;gap:17px;align-items:flex-start;min-height:110px}
.featured-item:hover{border-color:#9fbcaa}
.feature-number{color:var(--accent);font-size:11px;font-weight:700;letter-spacing:1px}
.featured-item strong,.phrase-row strong{display:block;font-size:14px;line-height:1.4;font-weight:650}
.featured-item small,.phrase-row small{display:block;font-size:13px;margin-top:8px;line-height:1.5;color:#89938b}
.featured-item.current{background:#f2f5ef;border-color:#bdd0c0}
.session-card{background:#edf1ea;border-radius:16px;padding:32px;margin-top:58px}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);margin:33px 0 27px;gap:20px}
.stat{display:flex;flex-direction:column;border-right:1px solid #d5dfd4}.stat:last-child{border:0}
.stat strong{font-size:35px;line-height:1.2;font-weight:550;font-variant-numeric:tabular-nums}.stat span{font-size:12px;color:#76827b;margin-top:8px}
.save-row{border-top:1px solid #d5dfd4;padding-top:23px;display:flex;justify-content:space-between;align-items:center;gap:15px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;border-radius:9px;padding:13px 19px;min-height:45px;font-size:12px;font-weight:750;white-space:nowrap}
.btn-dark{background:var(--ink);border:1px solid var(--ink);color:white}
.btn-dark:hover{background:#33483e}
.btn-outline{background:transparent;border:1px solid #c8d1c6;color:var(--ink)}
.btn-outline:hover{border-color:#758e7d}
.constructed{min-height:77px;background:#eef2ea;border:1px dashed #b3c1b4;border-radius:12px;display:flex;align-items:center;flex-wrap:wrap;gap:9px;padding:12px;margin-bottom:20px}
.constructed:empty:before{content:"Tap words below to build your sentence…";color:#a1aba2;font-size:13px}
.chunk-bank{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}
.chunk{font-size:17px;background:var(--paper);border:1px solid #d4ded3;border-radius:9px;padding:13px 17px;line-height:1.4}
.chunk small{font-size:11px;color:#93a093;display:block;margin-top:6px}
.constructed .chunk{background:#fff;border-color:#a6c3aa;padding:11px 14px}
.activity-actions,.speaking-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.activity-instructions{font-size:14px;color:#76827c;line-height:1.65;max-width:580px}
.speaking-actions{margin:22px 0 20px}
.input-label{display:block;font-size:11px;color:#7d8981;font-weight:750;letter-spacing:.7px;margin:18px 0 9px}
#spokenInput,.manual-input-row input,.search-input,.login-form input{width:100%;min-width:0;border:1px solid #dce4da;border-radius:10px;background:white;padding:15px;font-size:14px;color:var(--ink);outline:0}
#spokenInput{margin-bottom:17px}
#spokenInput:focus,.manual-input-row input:focus,.search-input:focus,.login-form input:focus{border-color:#8da899}
.speech-caveat{margin-top:17px;color:#919a92;font-size:11px}
.small-hero{margin-bottom:45px}.small-hero h1{font-size:clamp(3.3rem,6vw,5.7rem)}.field-heading{margin-bottom:12px}
.search-input{margin-bottom:20px;background:transparent;border-radius:8px}
.phrase-results{border-top:1px solid var(--line)}
.phrase-row{display:grid;grid-template-columns:37px 1fr auto;gap:12px;align-items:center;padding:17px 8px;border:0;border-bottom:1px solid var(--line);background:transparent;width:100%;text-align:left;color:var(--ink)}
.phrase-row>span{font-size:11px;color:#a4aea5}
.phrase-row:hover{background:#eff2ec}
.phrase-row .phrase-arrow{font-size:19px;color:var(--green)}
.load-more-row{margin-top:23px;text-align:center}
.manual-box,.memory-box{margin-top:58px;padding:29px 31px 32px;border:1px solid var(--line);border-radius:16px;background:var(--paper)}
.manual-input-row{display:flex;gap:11px;align-items:stretch;margin-top:19px}
.manual-input-row .btn{flex:none}
.manual-note{font-size:12px;color:#8b968c;line-height:1.65;margin-top:16px}
.memory-status{display:flex;align-items:flex-start;gap:17px;padding:24px 26px;background:#edf1ea;border-radius:14px}
.memory-status h3{font-size:17px;margin:0 0 8px}.memory-status p{font-size:13px;color:#758279;margin:0;line-height:1.7}
.status-orb{margin-top:6px;display:block;width:12px;height:12px;flex:none;border-radius:50%;background:#d9a47d}.status-orb.connected{background:#4e9673}
.memory-box{margin-top:25px}.context-results{margin-top:24px}.context-item{border-top:1px solid var(--line);padding:19px 0;display:flex;justify-content:space-between;gap:15px;align-items:center}
.context-item h4{margin:0 0 6px;font-size:14px}.context-item p{margin:0;font-size:12px;color:#7f8a82;line-height:1.55;overflow-wrap:anywhere}
.context-item button{flex:none;background:none;border:0;color:var(--green);font-size:12px;font-weight:650}
.memory-description{margin:47px 0}.memory-description p{max-width:560px;line-height:1.85;font-size:14px;color:#818b83}
.footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:80px;padding:25px 0;color:#a2aaa2;font-size:10px;letter-spacing:1px}
.login-screen{display:grid;place-items:center;min-height:100vh;padding:26px}
.login-card{max-width:470px;width:100%;background:white;border:1px solid var(--line);border-radius:20px;padding:48px 45px;box-shadow:var(--shadow)}
.login-visual{font-size:clamp(2.9rem,6vw,4rem);line-height:1.12;letter-spacing:-2.5px;margin-top:68px;font-weight:630}
.login-visual span{color:var(--accent);font:italic 400 1em Georgia,serif;letter-spacing:-2.6px}
.login-form{display:flex;flex-direction:column;gap:10px;margin-top:40px}
.login-form label{font-size:12px;font-weight:700}.login-form .btn{justify-content:space-between;margin-top:4px}
.form-message{color:#b84c36;min-height:18px;font-size:12px;margin:13px 0 28px}
@media(max-width:1050px){.layout{grid-template-columns:190px minmax(0,1fr)}.sidebar{padding-left:17px;padding-right:15px}.main{padding-left:32px;padding-right:32px}.hero h1{letter-spacing:-3.5px}}
@media(max-width:770px){.topbar{height:75px;padding:0 20px}.topbar-right .tiny{display:none}.layout{display:block}.sidebar{min-height:0;border-right:0;border-bottom:1px solid var(--line);padding:7px 12px 9px;display:block}.sidebar-label,.sidebar-bottom{display:none}.sidebar-nav{flex-direction:row;justify-content:space-around;gap:4px}.nav-link{width:auto;display:block;padding:11px 12px;white-space:nowrap}.nav-link span:first-child,.nav-arrow{display:none!important}.main{padding:27px 20px}.section-heading{flex-wrap:wrap;gap:18px;margin-bottom:42px}.hero{margin-bottom:46px}.hero h1{font-size:clamp(3.4rem,10vw,5rem);letter-spacing:-3.5px}.translation{padding:27px 22px}.lesson-top{padding:25px 22px}.grammar-row{padding:18px 22px}.featured-list{grid-template-columns:1fr}.session-card{padding:23px}.meaning-options{grid-template-columns:1fr}.meaning-option{min-height:0;padding:16px 20px;flex-direction:row-reverse;align-items:center}.activity{min-height:200px}.footer{margin-top:50px}.login-card{padding:38px 26px}}
@media(max-width:490px){.language-toggle{width:100%;justify-content:space-between}.language-toggle button{flex:1;padding:10px 8px}.language-toggle button span{display:none}.section-heading{margin-bottom:32px}.hero h1{font-size:3.4rem}.hero h1 em{letter-spacing:-3px}.hero p{font-size:13px}.lesson-top h2{font-size:21px}.target-row h3{font-size:2rem}.audio-btn{width:44px;height:44px}.grammar-row{display:block}.grammar-label{display:block;margin-bottom:8px}.practice-modes{gap:6px}.mode-btn{font-size:11px}.mode-btn span{display:none}.activity-heading{align-items:start}.activity-heading .tiny{display:none}.save-row,.manual-input-row{flex-direction:column;align-items:stretch}.stats-grid{gap:8px}.stat strong{font-size:29px}.stat span{font-size:11px;padding-right:7px}.context-item{display:block}.context-item button{margin-top:11px;padding:0}.login-visual{margin-top:45px}}