@import url('https://fonts.googleapis.com/css2?family=Kanit:wght@400;500;600;700&family=Sarabun:wght@400;500;600;700&display=swap');
:root{--navy:#12304a;--navy2:#1e4968;--teal:#087f8c;--teal-light:#e4f5f5;--ink:#193247;--muted:#667987;--line:#dbe5eb;--bg:#f5f8fa;--white:#fff;--warning:#8a5a00;--warning-bg:#fff7e6;--danger:#ad3131;--danger-bg:#fff0f0;--success:#15734a;--success-bg:#e8f7ef;--shadow:0 10px 30px rgba(18,48,74,.07)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:'Sarabun',Tahoma,sans-serif;font-size:16px;line-height:1.65}button,input,select{font:inherit}a{color:var(--teal);text-decoration:none}a:hover{text-decoration:underline}.container{width:min(1120px,calc(100% - 40px));margin:0 auto}.narrow{width:min(850px,calc(100% - 40px))}.site-header{background:var(--navy);color:#fff;box-shadow:0 3px 15px rgba(10,32,49,.15)}.header-inner{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;align-items:center;gap:12px;color:#fff}.brand:hover{text-decoration:none}.brand-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;background:#fff;color:var(--navy);font-family:'Kanit',sans-serif;font-size:25px;font-weight:700}.brand strong,.brand small{display:block}.brand strong{font-family:'Kanit',sans-serif;font-size:17px;line-height:1.3}.brand small{font-size:11px;opacity:.72;letter-spacing:.08em;text-transform:uppercase}.header-tag{border:1px solid rgba(255,255,255,.26);border-radius:999px;padding:7px 13px;font-size:12px;color:#e1f6f7}.back-link{color:#e1f6f7;font-size:14px}.main-content{padding-top:34px;padding-bottom:62px}.hero{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:28px;padding:40px 44px;border-radius:26px;background:linear-gradient(122deg,#12304a 0%,#1d5674 74%,#087f8c 130%);color:#fff;box-shadow:var(--shadow);min-height:260px}.hero-copy{position:relative;z-index:1;max-width:760px}.eyebrow{margin:0 0 9px;font:600 11px/1.4 'Kanit',sans-serif;letter-spacing:.14em;color:var(--teal)}.hero .eyebrow,.lesson-heading .eyebrow{color:#91e5e0}.hero h1,.lesson-heading h1{font-family:'Kanit',sans-serif;font-size:clamp(28px,4vw,42px);line-height:1.25;margin:0 0 12px;font-weight:600}.lead{font-size:17px;line-height:1.7;color:inherit;opacity:.86;margin:0;max-width:760px}.hero-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.meta-pill{display:inline-flex;align-items:center;gap:7px;padding:6px 11px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);border-radius:999px;font-size:12px}.hero-icon{width:146px;height:158px;flex:0 0 146px;border:1px solid rgba(255,255,255,.24);border-radius:25px;background:rgba(255,255,255,.10);transform:rotate(4deg);position:relative;margin-right:8px}.hero-icon:before{content:'';position:absolute;left:28px;top:26px;width:79px;height:105px;background:#f8ffff;border-radius:10px;box-shadow:0 8px 16px rgba(0,0,0,.12)}.hero-icon>span{position:absolute;z-index:1;right:35px;top:17px;color:var(--teal);font-size:30px;font-weight:700}.paper-line{position:absolute;z-index:1;left:43px;top:64px;width:49px;height:5px;border-radius:5px;background:#c8e3e6}.paper-line.short{top:79px;width:35px}.paper-check{position:absolute;z-index:1;left:48px;top:99px;display:grid;place-items:center;border-radius:8px;width:34px;height:25px;background:#0d8993;color:#fff;font-size:18px;font-weight:700}.intro-row{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:40px 0 19px}.intro-row h2,.section-heading h2,.task-card h2,.task-card h3,.receipt-files h3{font-family:'Kanit',sans-serif;font-weight:500}.intro-row h2{margin:0 0 7px;font-size:25px}.intro-row .muted{margin:0}.muted{color:var(--muted)}.summary-count{white-space:nowrap;border-radius:12px;padding:9px 13px;background:#e7f2f4;color:#175b69;font-size:13px;font-weight:700}.units-list{display:grid;gap:17px}.unit-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 4px 14px rgba(18,48,74,.03)}.unit-head{display:flex;gap:14px;align-items:center;padding:20px 23px;background:#fbfdfe;border-bottom:1px solid #edf1f4}.unit-number{display:grid;place-items:center;width:42px;height:42px;flex:0 0 42px;border-radius:13px;color:var(--teal);background:var(--teal-light);font:600 15px 'Kanit',sans-serif}.unit-head h3{font:500 18px/1.45 'Kanit',sans-serif;margin:0}.unit-head p{color:var(--muted);font-size:13px;margin:3px 0 0}.lesson-list{padding:5px 20px}.lesson-row{display:flex;align-items:center;gap:14px;padding:15px 2px;border-bottom:1px solid #edf1f4}.lesson-row:last-child{border-bottom:0}.lesson-index{flex:0 0 35px;width:35px;height:35px;display:grid;place-items:center;border-radius:10px;background:#f0f4f7;color:#526776;font:500 14px 'Kanit',sans-serif}.lesson-main{min-width:0;flex:1}.lesson-main strong{display:block;font-size:15px;font-weight:600}.lesson-main small{display:block;color:var(--muted);font-size:12px;margin-top:2px}.lesson-actions{display:flex;align-items:center;gap:12px}.status-pill{display:inline-flex;align-items:center;white-space:nowrap;border-radius:999px;padding:4px 9px;font-size:11px;font-weight:700}.status-open{background:#e6f6ee;color:#166543}.status-closed{background:#f1f3f5;color:#5d6870}.status-draft{background:#f0eefa;color:#6553a3}.lesson-link{display:inline-flex;align-items:center;justify-content:center;padding:8px 12px;border-radius:10px;background:var(--navy);color:#fff;font-size:12px;font-weight:700;white-space:nowrap}.lesson-link:hover{background:var(--teal);text-decoration:none}.lesson-link.disabled{background:#e9eef1;color:#6e7d87;}.notice{padding:14px 16px;border-radius:13px;font-size:14px;margin:18px 0}.notice-warning{background:var(--warning-bg);border:1px solid #f0d79a;color:var(--warning)}.notice-error{background:var(--danger-bg);border:1px solid #f5c6c6;color:var(--danger)}.notice-success{background:var(--success-bg);border:1px solid #b6e2c9;color:var(--success)}.notice ul{margin:8px 0 0;padding-left:20px}.privacy-note{display:flex;gap:13px;align-items:flex-start;margin-top:28px;border:1px solid #d5e9e8;background:#f0fafa;border-radius:16px;padding:18px 20px}.privacy-note strong{font-size:14px}.privacy-note p{margin:4px 0 0;color:#5e757c;font-size:13px}.privacy-icon{display:grid;place-items:center;flex:0 0 29px;width:29px;height:29px;border-radius:50%;background:#d7f1ee;color:#087f8c;font-weight:700}.site-footer{border-top:1px solid var(--line);background:#fff;color:#798995;font-size:12px}.footer-inner{display:flex;justify-content:space-between;gap:20px;padding-top:20px;padding-bottom:20px}.breadcrumbs{display:flex;gap:10px;align-items:center;font-size:12px;color:#82909a;margin:0 0 21px}.lesson-heading{padding:12px 2px 26px}.lesson-heading .eyebrow{color:var(--teal)}.lesson-heading h1{font-size:32px;color:var(--navy);margin-bottom:9px}.lesson-heading .lead{color:#607582;font-size:16px}.lesson-heading .hero-meta{margin-top:15px}.lesson-heading .meta-pill{border-color:#dbe6eb;background:#fff;color:#405766}.task-card,.form-card,.receipt-card{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:25px 28px;margin-bottom:20px}.task-card h2{font-size:20px;margin:0 0 7px}.task-card h3{font-size:16px;margin:21px 0 5px}.task-card p{white-space:pre-wrap;margin:0;color:#4d6372}.file-rules{border-top:1px solid #e9eef1;margin-top:20px;padding-top:14px;display:flex;flex-wrap:wrap;gap:8px}.rule-chip{border-radius:9px;background:#f1f6f8;color:#4e6573;padding:6px 9px;font-size:12px}.section-heading{display:flex;gap:12px;align-items:center;margin-bottom:20px}.section-heading h2{font-size:20px;line-height:1.3;margin:0 0 4px}.section-heading p{font-size:13px;color:var(--muted);margin:0}.step-number{display:grid;place-items:center;width:37px;height:37px;flex:0 0 37px;background:var(--teal-light);color:var(--teal);border-radius:12px;font:600 16px 'Kanit',sans-serif}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px 18px}.field{display:flex;flex-direction:column;gap:7px}.field>span{font-size:14px;font-weight:600}.field b{color:var(--danger)}.field input,.field select{width:100%;height:46px;border:1px solid #ccd9e1;border-radius:10px;background:#fff;padding:0 12px;color:var(--ink);outline:none;transition:border .15s,box-shadow .15s}.field input:focus,.field select:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(8,127,140,.12)}.field input::placeholder{color:#9aa8b1}.field-error{color:var(--danger);font-size:12px;min-height:0}.upload-heading{margin-top:34px}.upload-zone{display:flex;align-items:center;flex-direction:column;justify-content:center;text-align:center;padding:27px 20px;border:1.5px dashed #a9c3cc;border-radius:15px;background:#f8fcfd}.upload-icon{display:grid;place-items:center;width:46px;height:46px;margin-bottom:9px;border-radius:14px;background:#dff3f3;color:var(--teal);font-size:25px;font-weight:700}.upload-zone strong{font-size:15px}.upload-zone p{margin:3px 0 13px;font-size:13px;color:var(--muted)}.button{display:inline-flex;gap:10px;align-items:center;justify-content:center;border:0;border-radius:11px;min-height:45px;padding:10px 18px;font-weight:700;font-size:14px;cursor:pointer;transition:background .15s,transform .15s}.button:active{transform:translateY(1px)}.button:disabled{cursor:not-allowed;opacity:.48}.button-primary{background:var(--navy);color:#fff}.button-primary:hover:not(:disabled){background:var(--teal)}.button-outline{border:1px solid #b9ccd5;background:#fff;color:var(--navy)}.button-outline:hover{background:#eff7f8}.button-small{min-height:31px;padding:5px 9px;font-size:11px}.selected-files{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:8px}.selected-files li{display:flex;align-items:center;gap:11px;border:1px solid #e1e9ee;background:#fbfdfe;border-radius:11px;padding:10px 12px}.file-symbol{display:grid;place-items:center;width:35px;height:39px;border-radius:9px;background:#e8f1f5;color:#1b6175;font-size:10px;font-weight:700;flex:0 0 35px}.file-info{min-width:0;flex:1}.file-info strong{display:block;overflow-wrap:anywhere;font-size:13px;font-weight:600}.file-info small{display:block;font-size:11px;color:var(--muted)}.remove-file{border:1px solid #ead0d0;background:#fff;color:#a33b3b;border-radius:8px;padding:5px 9px;font-size:12px;cursor:pointer}.file-error{margin-top:8px}.security-heading{margin-top:32px}.turnstile-container{min-height:75px;display:flex;align-items:center;justify-content:flex-start;padding:5px 0}.submit-actions{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-top:22px;padding-top:20px;border-top:1px solid #e9eef1}.privacy-small{max-width:440px;font-size:12px;margin:0}.submit-actions .button{min-width:150px}.progress-wrap{margin-top:20px;border:1px solid #d1e8e8;background:#f5fbfb;padding:15px;border-radius:13px}.progress-label{display:flex;justify-content:space-between;gap:10px;font-size:13px}.progress-label span{color:var(--teal);font-weight:700}.progress-track{height:8px;background:#dfecee;border-radius:999px;overflow:hidden;margin:11px 0}.progress-bar{width:0;height:100%;border-radius:999px;background:linear-gradient(90deg,#087f8c,#45bab8);transition:width .15s}.progress-wrap p{font-size:12px;margin:0}.honeypot{position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;overflow:hidden!important}.receipt-card{text-align:center;padding:38px 30px}.success-mark{display:grid;place-items:center;width:68px;height:68px;margin:0 auto 18px;border-radius:50%;background:#dff5e9;color:var(--success);font-size:35px;font-weight:700}.receipt-card h1{font:600 32px 'Kanit',sans-serif;margin:0 0 9px;color:var(--navy)}.receipt-card .lead{margin:0 auto 25px;color:var(--muted);font-size:15px}.receipt-id-wrap{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;background:#f4f8fa;border:1px dashed #bbd1db;padding:15px;border-radius:13px}.receipt-id-wrap span{font-size:12px;color:var(--muted)}.receipt-id-wrap strong{font:600 16px 'Kanit',sans-serif;color:var(--navy);overflow-wrap:anywhere}.receipt-details{display:grid;grid-template-columns:1fr 1fr;gap:14px;text-align:left;margin:24px 0;padding:19px;background:#fbfdfe;border:1px solid #e7edf1;border-radius:13px}.receipt-details div{min-width:0}.receipt-details dt{font-size:11px;color:var(--muted)}.receipt-details dd{margin:3px 0 0;font-size:14px;font-weight:600;overflow-wrap:anywhere}.receipt-files{text-align:left}.receipt-files h3{font-size:16px;margin:0 0 8px}.receipt-files ul{margin:0;padding-left:20px}.receipt-files li{font-size:13px;overflow-wrap:anywhere;padding:3px 0}.receipt-time{font-size:12px;margin:15px 0 22px}.skeleton{height:180px;border-radius:17px;background:linear-gradient(90deg,#eaf0f3,#f6f9fa,#eaf0f3);background-size:200% 100%;animation:shimmer 1.5s infinite}@keyframes shimmer{to{background-position:-200% 0}}.hidden{display:none!important}
@media(max-width:720px){.container,.narrow{width:min(100% - 28px,1120px)}.header-inner{min-height:68px}.brand strong{font-size:14px}.brand-mark{width:39px;height:39px;font-size:22px}.header-tag{font-size:10px;padding:6px 9px}.hero{padding:29px 24px;min-height:unset;border-radius:20px}.hero h1{font-size:29px}.hero .lead{font-size:15px}.hero-icon{width:94px;height:114px;flex-basis:94px;margin-right:0;transform:scale(.8) rotate(4deg);transform-origin:center}.hero-icon:before{left:17px;top:20px;width:58px;height:77px}.hero-icon>span{right:18px;top:11px}.paper-line{left:28px;top:46px;width:35px;height:4px}.paper-line.short{top:57px;width:24px}.paper-check{left:31px;top:71px;width:25px;height:20px}.intro-row{align-items:start;margin-top:31px}.intro-row h2{font-size:21px}.summary-count{font-size:11px;padding:7px 9px}.unit-head{padding:16px}.unit-head h3{font-size:15px}.lesson-list{padding:3px 13px}.lesson-row{gap:10px;align-items:flex-start}.lesson-index{width:30px;height:31px;flex-basis:30px}.lesson-main strong{font-size:13px;line-height:1.45}.lesson-main small{font-size:11px}.lesson-actions{flex-direction:column;gap:6px;align-items:flex-end}.status-pill{font-size:9px;padding:3px 7px}.lesson-link{font-size:10px;padding:7px 9px}.footer-inner{flex-direction:column;gap:4px}.main-content{padding-top:23px}.lesson-heading h1{font-size:26px}.task-card,.form-card,.receipt-card{padding:20px 17px;border-radius:16px}.form-grid{grid-template-columns:1fr;gap:14px}.submit-actions{align-items:stretch;flex-direction:column}.submit-actions .button{width:100%}.privacy-small{max-width:unset}.receipt-details{grid-template-columns:1fr}.receipt-card h1{font-size:28px}.receipt-id-wrap{flex-direction:column}.back-link{font-size:12px}}
@media(max-width:420px){.hero-icon{display:none}.header-tag{max-width:105px;text-align:center;line-height:1.25}.intro-row{flex-direction:column;gap:9px}.lesson-row{gap:7px}.lesson-actions{min-width:69px}.unit-head p{font-size:11px}}