:root{--navy:#092436;--navy2:#132e40;--teal:#078c7c;--aqua:#9eecd5;--ink:#142f3e;--muted:#57717b;--line:#d9e6e2;--bg:#f6f9f7;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.6}h1,h2,h3,p{overflow-wrap:break-word}a{color:#0b7469}button,input,select{font:inherit}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #f3aa4b;outline-offset:3px}.wrap{width:min(1160px,100%);margin-inline:auto;padding-inline:24px}.narrow{max-width:1000px}.hidden{display:none!important}.skip{position:absolute;top:-100px;left:10px;padding:10px;background:white;z-index:30}.skip:focus{top:10px}.header{background:var(--navy);color:#eafbf6;border-bottom:1px solid #355568}.nav{min-height:80px;display:flex;align-items:center;gap:26px}.brand{display:flex;gap:11px;align-items:center;color:#fff;text-decoration:none;font-weight:900;font-size:21px;line-height:1}.brand small{display:block;font-size:10px;letter-spacing:.2em;color:#82e2c8;margin-top:7px}.nav nav{display:flex;align-items:center;gap:23px;margin-left:auto}.nav nav a{text-decoration:none;color:#c5dedb;font-size:14px}.nav nav a:hover{color:#fff}.navcontact{text-decoration:none;padding:10px 14px;border:1px solid #68cdb6;border-radius:10px;color:#bbf7e5;font-size:13px;font-weight:800}.hero{background:radial-gradient(circle at 84% 16%,#255c65 0%,transparent 41%),linear-gradient(120deg,#092436,#123849);color:#fff}.hero-grid{display:grid;grid-template-columns:1.4fr .85fr;gap:60px;align-items:center;padding-block:100px}.eyebrow{font-size:12px;letter-spacing:.17em;font-weight:900;text-transform:uppercase;color:var(--teal)}.hero .eyebrow{color:#9deed2}.shine{display:inline-block;width:8px;height:8px;border-radius:50%;background:#7dedba;margin-right:5px}.hero h1{font-size:clamp(42px,5vw,70px);letter-spacing:-.054em;line-height:1.11;margin:17px 0 25px}.hero h1 em{font-style:normal;color:#82e4c6}.hero-lead{color:#c4dde0;font-size:18px;max-width:690px}.actionrow{display:flex;flex-wrap:wrap;align-items:center;gap:11px;margin:26px 0}.btn{border:none;display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:10px 16px;border-radius:10px;font-weight:800;text-decoration:none;cursor:pointer;text-align:center;white-space:normal}.btn.primary{background:#078f7c;color:#fff}.btn.primary:hover{background:#056e60}.btn.outline{border:1px solid #7bcdbb;color:#eafef7;background:transparent}.btn.outline.dark{border-color:#9bafac;color:var(--ink)}.btn.subtle{color:var(--ink);background:#e9f2ee;border:1px solid #d0e2dc}.btn.small{font-size:13px;min-height:38px;padding:8px 13px}.micro,.small-note{font-size:13px;color:#78939a}.hero .micro{color:#98bfc5}.hero-panel{padding:25px;background:#ffffff0d;border:1px solid #6ae1c13d;border-radius:24px;box-shadow:0 20px 50px #041b273e}.stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.stat-grid div{border-bottom:1px solid #ffffff30;padding-bottom:15px}.stat-grid strong{display:block;font-size:41px;letter-spacing:-.05em;color:#a4ffe0;line-height:1.1}.stat-grid span{font-size:13px;color:#b4d3d7}.hero-note{color:#c5dedb;font-size:13px;margin-top:19px}.code-art{background:#041925;border:1px solid #335765;border-radius:13px;padding:17px;font-family:ui-monospace,Consolas,monospace;margin-top:17px;color:#b3efce;display:flex;flex-direction:column;font-size:14px}.section{padding-block:69px;scroll-margin-top:30px}.section-head{max-width:840px;margin-bottom:25px}.section-head h2,.cta h2{font-size:clamp(30px,4vw,44px);letter-spacing:-.045em;line-height:1.17;margin:12px 0}.section-head p{color:var(--muted);font-size:16px}.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.tier{border-radius:19px;background:#fff;border:1px solid var(--line);padding:24px;box-shadow:0 8px 23px #1b4e4830;display:flex;flex-direction:column;gap:4px}.tier.featured{border:2px solid #159a88}.tiertop{display:flex;justify-content:space-between;align-items:center;gap:9px;font-weight:900;color:#057767;font-size:12px;letter-spacing:.05em}.tiny-pill{background:#dbf3e8;color:#076b56;border-radius:999px;padding:4px 9px;font-size:11px;font-weight:800;letter-spacing:0;white-space:normal}.tiny-pill.grey{background:#e9eeec;color:#4d6a67}.tier h3{font-size:22px;line-height:1.3;margin:13px 0 3px}.tier p{color:#5a6e75;margin:0 0 13px}.tier strong{margin-top:auto;color:#086b60}.tinted{background:#e9f2ee}.filterbox{background:white;border:1px solid var(--line);border-radius:16px;display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:11px;align-items:end;padding:17px}.filterbox label,.panel label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:750}.filterbox input,.filterbox select,.panel input,.panel select,.panel textarea,select#tool-track{width:100%;min-height:44px;border:1px solid #b4c9c3;border-radius:9px;padding:8px 11px;background:white;color:var(--ink)}.resultsbar{display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:13px;margin:17px 0}.resultsbar strong{font-size:16px;color:var(--ink)}.catalog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.course-card{padding:22px;background:white;border:1px solid #d2e2dc;border-radius:16px;display:flex;flex-direction:column;box-shadow:0 6px 15px #18493f0b}.tags{display:flex;gap:6px;flex-wrap:wrap}.tag{font-size:11px;font-weight:800;color:#047361;background:#e1f3ec;padding:3px 8px;border-radius:6px}.tag.neutral{background:#edf0f2;color:#4e6370}.course-card h3{font-size:19px;line-height:1.32;margin:15px 0 7px}.course-desc{font-size:14px;color:var(--muted);flex:1}.course-foot{display:flex;justify-content:space-between;gap:8px;align-items:end;border-top:1px solid var(--line);padding-top:12px;margin-top:10px}.small-label{font-size:11px;display:block;color:#678079}.price{display:block;font-size:21px;letter-spacing:-.035em;color:#075e53}.load-more{text-align:center;margin-top:25px}.help-text{color:#68817b;font-size:13px}.cta{padding:38px 46px;display:grid;grid-template-columns:2fr .85fr;align-items:center;gap:30px;background:#fff;border:1px solid #d7e6de;border-radius:23px}.cta p{color:#526c72}.cta .eyebrow{color:#078c7c}.contact-art{color:#116e62;font-family:ui-monospace,Consolas,monospace;font-weight:800;font-size:27px;text-align:center;line-height:1.9}.muted{color:var(--muted)}footer{background:#102b3c;color:#cfe5e0;padding:32px 0}.foot{display:flex;justify-content:space-between;gap:20px}.foot strong{letter-spacing:.11em}.foot p{font-size:13px;color:#b2cbcd;margin:7px 0}.foot a{color:#9cead2}.back{margin-bottom:18px}.page-title{font-size:clamp(32px,5vw,50px);line-height:1.14;letter-spacing:-.045em;margin:12px 0 18px}.intro{font-size:17px;color:#556f78;max-width:810px}.course-heading{display:grid;grid-template-columns:1.55fr .85fr;gap:25px;align-items:start}.price-panel,.panel{border-radius:15px;border:1px solid #d1e3db;background:#fff;padding:24px;margin-bottom:18px}.price-panel .big-price{font-size:34px;display:block;color:#0d6c5e;letter-spacing:-.04em}.price-panel p{font-size:13px;color:var(--muted)}.price-panel a{display:flex}.lesson-outline{margin-top:30px}.session-grid{list-style:none;margin:20px 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px}.session-grid li{display:flex;align-items:flex-start;gap:11px;background:#f4f9f6;border:1px solid #e1ebe6;padding:12px;border-radius:11px;font-weight:650;font-size:14px}.session-index{color:#0c8574;font-weight:900}.session-grid .tiny-pill{margin-left:auto}.panel h2{font-size:24px;letter-spacing:-.035em;margin-top:0}.panel p{color:#4d6570}.panel a.text-link{color:#086b60;font-weight:800}.panel ol,.panel ul{padding-left:25px}.panel ol li,.panel ul li{margin-bottom:9px}.code-block{background:#102c3b;border-radius:12px;padding:20px;color:#ceefdf;overflow-x:auto;white-space:pre;font-size:13px;font-family:ui-monospace,Consolas,monospace;line-height:1.6}.expected{background:#eff8f1;border-left:4px solid #0a9276;padding:15px;border-radius:7px}.panel details{padding:12px 15px;background:#eff6f1;border-radius:9px}.panel summary{cursor:pointer;font-weight:800}.notice{padding:15px 19px;border-radius:12px;background:#e6f1eb;border:1px solid #b5d9c9;color:#285347;margin:20px 0}.account-columns{display:grid;grid-template-columns:1fr 1fr;gap:20px}.panel form{margin:0}.account-columns .panel{display:flex;flex-direction:column;gap:14px}.inline-error{min-height:20px;font-size:13px}.error{color:#9d3232!important}.request{border-bottom:1px solid var(--line);padding:15px 0}.request strong{display:block}.request .small-note{display:block}.lesson-buttons{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}.tiny-button{padding:6px 9px;font-size:12px;background:#e5f3ee;border:1px solid #bdd4ca;border-radius:6px;cursor:pointer}.tiny-button:hover{background:#cceadd}.study{max-height:70vh;overflow:auto;border:1px solid #d8e7dc;border-radius:9px;padding:20px;background:#fcfdfc}.study h2{font-size:20px;margin-top:22px}.study h3{font-size:17px;margin-top:19px}.study p,.study li{font-size:14px}.study .code-block{font-size:12px}.study .table-line{overflow:auto;white-space:pre;font-size:12px}.request-admin .btn{margin:5px}.prose h2{margin-top:30px}.prose h2:first-child{margin-top:0}
@media(max-width:980px){.nav nav{display:none}.navcontact{margin-left:auto}.catalog-grid{grid-template-columns:repeat(2,1fr)}.filterbox{grid-template-columns:1fr 1fr}.hero-grid{gap:30px}.course-heading{grid-template-columns:1fr}}
@media(max-width:720px){.wrap{padding-inline:17px}.hero-grid{display:block;padding-block:65px}.hero-panel{margin-top:35px}.hero h1{font-size:42px}.tiers,.catalog-grid,.account-columns{grid-template-columns:1fr}.filterbox{grid-template-columns:1fr}.resultsbar,.foot{display:block}.course-foot{align-items:center}.session-grid{grid-template-columns:1fr}.cta{grid-template-columns:1fr;padding:29px}.contact-art{display:none}.section{padding-block:52px}.nav{min-height:67px}.brand{font-size:18px}.navcontact{font-size:11px;padding:8px}.price-panel{margin-top:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Trang thiết lập chủ sở hữu: không dùng inline CSS vì CSP */
body:has(#setup) {max-width:680px;margin:32px auto;padding:20px;}
#setup{background:var(--panel,#ffffff);border:1px solid #cfe2d8;border-radius:16px;padding:25px;display:grid;gap:14px;margin:16px 0;}
#setup label{display:grid;gap:4px;}
#setup input{font:inherit;padding:11px;border-radius:9px;border:1px solid #accdc3;}
#setup button{background:#087a68;color:white;font:inherit;font-weight:800;padding:11px;border:0;border-radius:9px;}

/* Phòng thực hành: di động, dễ nhìn, không ép người học chỉ đọc lý thuyết. */
.lesson-tabbar,.lab-actions,.lab-task-nav{display:flex;flex-wrap:wrap;gap:9px;margin:14px 0}
.lab-hero{padding:21px 23px;background:#e6f3ee;border:1px solid #c3e5d7;border-radius:14px;margin-bottom:15px}.lab-hero h3{font-size:23px;line-height:1.2;margin:9px 0}.lab-hero p{color:#345c58;font-size:14px;margin:0}
.lab-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:14px 0}.lab-step{padding:11px;background:#f5f8f6;border:1px solid #dae5dd;font-weight:800;font-size:12px;border-radius:9px;text-align:center}
.lab-tool-guide{background:#f4f8f5;border:1px solid #d1e3db;padding:15px 19px;border-radius:12px;margin:16px 0}.lab-tool-guide summary{font-weight:800;cursor:pointer}
.lab-assignment{padding:21px}.lab-task-button{border:1px solid #adcac0;background:white;border-radius:9px;padding:11px 18px;font-weight:800;color:#285e55;cursor:pointer}.lab-task-button.active{background:#0d806e;color:white;border-color:#0d806e}
.lab-problem{padding:12px 16px;background:#f3f8f4;border-radius:12px;margin:12px 0 17px;white-space:pre-wrap}.lab-problem h4{margin:4px 0 11px}.lab-problem p{margin:0;color:#244e4a}.lab-verification{font-size:12px;font-weight:750;color:#096a5d;margin-top:11px}
.lab-editor-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(245px,.9fr);gap:16px}.lab-label{display:flex;flex-direction:column;gap:7px;font-weight:800;font-size:14px}.lab-code{min-height:310px;width:100%;font:13px/1.65 ui-monospace,SFMono-Regular,Consolas,monospace;tab-size:4;padding:15px!important;background:#102c3b!important;color:#e4fff2!important;border:1px solid #46606a!important;white-space:pre;resize:vertical;overflow:auto}.lab-test-guide{border:1px solid #d6e2dc;padding:15px;border-radius:12px;background:white;overflow:auto}.lab-test-guide h4{margin-top:0}.lab-case{padding:12px;background:#edf5ef;font:12px/1.5 ui-monospace,Consolas,monospace;border-radius:7px;white-space:pre-wrap;overflow-wrap:anywhere}
.lab-result{padding:12px;margin:12px 0 0;background:#eef7f0;border-radius:10px;min-height:40px;white-space:pre-wrap}.lab-result strong{display:block}.lab-output{background:#e7eef1;border-radius:7px;padding:9px;overflow:auto;font:12px/1.5 ui-monospace,Consolas,monospace;white-space:pre-wrap}.lab-fail{color:#ae2c30!important;font-weight:750}.lab-pass{color:#0b7959!important;font-weight:750}.lab-submission{margin-top:19px;padding-top:15px;border-top:1px solid #dfebe5}.lab-reflection{width:100%;min-height:110px;border:1px solid #b5ccc4;border-radius:8px;padding:12px;font:inherit;resize:vertical}.lab-history{padding:20px}.lab-history-item{padding:13px 15px;background:#f6f9f7;border:1px solid #d7e3dc;margin:12px 0;border-radius:10px}.lab-history-item summary{font-size:13px;cursor:pointer;font-weight:850;overflow-wrap:anywhere}.lab-history-item .code-block{max-height:370px;white-space:pre-wrap;overflow-wrap:anywhere}.lab-feedback{background:#e9f4ee;padding:12px;border-left:4px solid #088d72;border-radius:7px;white-space:pre-wrap}
@media(max-width:880px){.lab-editor-grid{grid-template-columns:1fr}.lab-steps{grid-template-columns:repeat(2,1fr)}.lab-code{min-height:260px}.lab-assignment{padding:14px}}

/* OctaCode — giao trình học viên: Markdown đã biên dịch thành HTML an toàn */
.study{max-height:78vh;overflow:auto;line-height:1.72;scrollbar-gutter:stable}
.study h1{font-size:clamp(22px,3vw,28px);line-height:1.32;margin:6px 0 18px}
.study h2{font-size:21px;line-height:1.38;margin:27px 0 12px;border-bottom:1px solid #d9e9e2;padding-bottom:9px}
.study h3{font-size:17px;margin:20px 0 9px}
.study p,.study li{font-size:15px;line-height:1.78;color:#203d46}
.study ul,.study ol{margin:10px 0 19px;padding-left:25px}
.study li{margin:7px 0}
.study strong{color:#133746}
.study blockquote{border-left:4px solid #09937d;background:#edf7f1;margin:19px 0;padding:12px 18px;border-radius:0 9px 9px 0}
.study blockquote p{margin:0}
.study code:not(pre code){background:#eaf1ed;border-radius:4px;padding:2px 5px;color:#075c52;font-size:.91em;overflow-wrap:anywhere}
.study pre{position:relative;white-space:pre;overflow-x:auto;max-width:100%;margin:18px 0 22px;padding:38px 18px 20px!important;background:#102c3b;color:#d4f4e7;border-radius:12px}
.study pre code{color:inherit;white-space:pre;font-size:13px;line-height:1.65;tab-size:4}
.study-code-copy{position:absolute;right:9px;top:8px;background:#e1f5ed;color:#0b584e;border:1px solid #8ac5b0;border-radius:7px;font-size:12px;font-weight:700;padding:5px 10px;cursor:pointer}
.study-table-wrap{max-width:100%;overflow-x:auto;margin:19px 0 23px;border:1px solid #cfdfd8;border-radius:10px}
.study table{width:100%;border-collapse:collapse;min-width:420px;background:#fff}
.study th{font-size:13px;background:#e7f1eb;color:#17483e;text-align:left;font-weight:800;padding:12px 14px;vertical-align:top}
.study td{font-size:13px;line-height:1.58;padding:10px 14px;vertical-align:top;border-top:1px solid #e1eae4}
.study tr:nth-child(even) td{background:#f7faf8}
.study a{color:#056a60;text-decoration:underline;text-underline-offset:3px;overflow-wrap:anywhere}
@media(max-width:620px){.study{padding:14px;max-height:none}.study p,.study li{font-size:14px}.study pre code{font-size:12px}}

/* Học theo ngôn ngữ bình dân, lộ trình rõ ràng trước khi thực hành */
.lab-example,.lab-glossary{border:1px solid #bcdccf;background:#f1f9f4;border-radius:13px;padding:18px 20px;margin:17px 0}
.lab-example summary,.lab-glossary summary{font-size:17px;font-weight:850;color:#15564b;cursor:pointer}
.lab-example pre{white-space:pre;overflow-x:auto;background:#123243;color:#e6fff1;padding:17px;border-radius:9px;font-size:13px;line-height:1.75}
.lab-example p{line-height:1.7;color:#25474b}.lab-example .lab-try{font-weight:700;color:#08685a}
.lab-guided-steps{margin-top:12px;padding:12px 16px;background:#fff;border:1px solid #d3e6db;border-radius:10px}
.lab-guided-steps strong{color:#0a685a}.lab-guided-steps ol{padding-left:21px;margin:9px 0}
.lab-guided-steps li{margin:9px 0;line-height:1.65}
.lab-advanced{border-top:1px solid #b8d6cc;margin-top:14px;padding-top:10px}
.lab-advanced summary{font-weight:700;cursor:pointer}.lab-advanced p{font-size:13px;line-height:1.65}
.lab-plain-example{font-size:15px!important;line-height:1.75!important;font-weight:650;color:#164f48!important}
.lab-starter-helper{padding:10px 13px;background:#fff4dc;border-left:4px solid #d99525;border-radius:6px;font-size:13px;line-height:1.6}
.study{max-height:none;overflow:visible;padding:clamp(16px,3.2vw,28px)}.study p,.study li{font-size:16px;line-height:1.8}
.study h2{margin-top:31px;color:#0d5d51}.study h3{margin-top:23px}.study blockquote{line-height:1.7}
.lab-task-nav .lab-task-button.active{outline:3px solid #b7e2cc;outline-offset:2px}
.lab-actions .lab-cant-run{width:100%;margin:4px 0;font-weight:650}
@media(max-width:620px){.lab-example,.lab-glossary{padding:14px}.study p,.study li{font-size:15px}}

.study-technical{border-top:2px solid #d4e7df;margin-top:40px;padding:17px;background:#f4f8f6;border-radius:12px}.study-technical summary{cursor:pointer;font-size:15px;font-weight:800;color:#165f53}.study-technical[open]{background:#fff}.study-technical h1{font-size:22px}.study-technical pre{overflow-x:auto}

/* OCTA PATH — khung học ngắn, đọc dễ và không ép giữ chuỗi ngày */
.path-overview,.path-summary{margin-top:1rem}.path-summary{border:1px solid #cadbdc;border-radius:14px;padding:.85rem;background:#f4faf8}
.path-summary summary,.path-readiness summary{font-weight:700;cursor:pointer;color:#064f50}.path-summary-content{padding:.6rem .25rem}.path-note{font-size:.9rem;color:#53616b;line-height:1.6}.path-check{display:flex;gap:.7rem;margin:.65rem 0;align-items:flex-start;cursor:pointer;line-height:1.5}.path-check input{min-width:18px;min-height:18px;margin-top:.2rem}
.path-two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.2rem}.path-two-col li{margin:.4rem 0}.path-local-progress{font-weight:600;color:#065c54;padding:.55rem;border-left:3px solid #12a38e}
#path-guide{margin:1rem 0;padding:1.25rem;border:1px solid #c7d6d8;border-radius:18px;background:#fff}
.path-intro h2{font-size:clamp(1.25rem,2vw,1.7rem);margin:.65rem 0}.path-intro p{line-height:1.65}
.path-progress{font-size:.88rem;color:#48616b;margin:1.1rem 0 .5rem;font-weight:700}.path-steps{display:flex;gap:.45rem;flex-wrap:wrap;margin-bottom:1.2rem}
.path-step-btn{background:#f3f7f6;border:1px solid #b7c8c6;border-radius:10px;padding:.65rem .75rem;color:#193846;font-weight:600;cursor:pointer;min-height:42px}.path-step-btn.active{background:#0b5c58;border-color:#0b5c58;color:#fff}
.path-step-content{border:1px solid #dce6e5;border-radius:12px;padding:1.2rem;background:#fbfdfd;line-height:1.7}.path-step-content h3{margin-top:0}
.path-step-content pre{max-width:100%;overflow:auto;font-size:.95rem;line-height:1.5;padding:1rem}
.path-expected,.path-soft,.path-review{border-left:4px solid #45a99c;background:#edf8f5;padding:.8rem 1rem;border-radius:8px}.path-try{font-weight:600;color:#0a5b59}.path-question{font-size:1.08rem;font-weight:700}
.path-choices{display:grid;gap:.65rem}.path-choice{border:1px solid #a1c1bc;text-align:left;border-radius:10px;padding:.8rem 1rem;background:#fff;color:#183341;font-weight:600;cursor:pointer;line-height:1.45}
.path-choice:hover,.path-choice:focus-visible{border-color:#005c56;background:#eaf9f6}.path-quiz-feedback{padding:.6rem .75rem;min-height:1.4rem}.path-correct,.path-status{color:#065c4d;font-weight:600}.path-retry{color:#854b13;font-weight:600}.path-bottom{display:flex;justify-content:space-between;gap:.8rem;flex-wrap:wrap;margin-top:1rem}
.path-status{background:#e7f6ef;border-radius:8px;padding:.65rem}.path-overview ul{padding-left:1.2rem}
@media(max-width:680px){.path-two-col{grid-template-columns:1fr}#path-guide{padding:.8rem}.path-step-btn{flex:1 1 43%;font-size:.9rem}.path-bottom button{flex:1}}

/* OCTA V2 — đoạn giải thích rõ ràng, che phần kỹ thuật sâu khỏi luồng đọc mặc định */
.academic-extended{margin-top:1.2rem;border:1px solid #b5caca;border-radius:14px;padding:1.1rem;background:#f3f8f7}
.academic-extended>summary{cursor:pointer;font-weight:700;color:#174b52}
.path-step-content{line-height:1.75;max-width:940px}
.path-soft{background:#eef7f5;border-radius:12px;padding:1rem;margin:1rem 0}
.path-question{font-weight:700}
.path-choice:focus-visible,.path-step-btn:focus-visible{outline:3px solid #147a80;outline-offset:3px}
/* V7 — evidence-based competency assessment, accessible in student/admin pages */
.octa-competency{margin-top:1rem}
.octa-competency summary{cursor:pointer;font-weight:700;padding:.5rem 0}
.octa-competency h3{margin:1rem 0 .35rem;font-size:1.05rem}
.octa-competency .octa-check{display:flex;align-items:flex-start;gap:.65rem;margin:.65rem 0;line-height:1.5;cursor:pointer}
.octa-competency .octa-check input{width:1.15rem;min-width:1.15rem;height:1.15rem;margin:.2rem 0 0}
.octa-competency .octa-verdict{font-weight:800;letter-spacing:.015em}
.octa-competency .octa-assess-feedback,.octa-competency .octa-assess-method{display:block;margin:1rem 0}
.octa-competency textarea,.octa-competency select{width:100%;margin-top:.35rem}

/* V8 class community */
.octa-classroom{margin:1rem 0;padding:1.15rem}.classroom-box{border:1px solid rgba(128,153,171,.3);border-radius:12px;padding:1rem;margin:1rem 0}.classroom-box .btn{margin:.35rem .45rem .35rem 0}.classroom-request-form,.classroom-admin-form{display:grid;gap:.7rem;padding:1rem;border:1px solid rgba(128,153,171,.3);border-radius:12px}.classroom-admin-form label,.classroom-request-form label{display:flex;flex-direction:column;gap:.3rem}.classroom-admin-form input,.classroom-admin-form select,.classroom-request-form select{max-width:100%;padding:.6rem;border-radius:.4rem;background:var(--panel,#fff);color:inherit;border:1px solid #a8b6c3}.classroom-request-form button,.classroom-admin-form button{justify-self:start}.classroom-box p{margin:.45rem 0}

/* V9 Instructor scripts, keyboard and narrow screens */
.instructor-selects{display:flex;gap:.75rem;flex-wrap:wrap;align-items:center;margin:1rem 0}
.instructor-selects select{border:1px solid #93a4b8;border-radius:.6rem;padding:.8rem;color:#14283c;max-width:100%;flex:1 1 180px;background:white}
.instructor-phase{border-left:3px solid #197c9b;background:#f3f9fb;border-radius:.4rem;padding:.85rem 1rem;margin:.8rem 0}
.instructor-phase h3{font-size:1.03rem;margin:.1rem 0 .6rem}.instructor-phase p{white-space:pre-wrap;overflow-wrap:anywhere}
.instructor-view{overflow-wrap:anywhere;white-space:normal}.instructor-view details{padding:1rem;border:1px solid #93a4b8;border-radius:.75rem}
.instructor-view :focus-visible{outline:3px solid #ffb54c;outline-offset:3px}
@media(max-width:700px){.instructor-selects{flex-direction:column;align-items:stretch}.instructor-selects select{flex:auto;width:100%}}

.course-stage-targets{margin-top:1rem;padding:.85rem 1rem;border:1px solid #9daebc;border-radius:.65rem}.course-stage-targets summary{font-weight:700;cursor:pointer}.course-stage-targets ol{padding-left:1.4rem}.course-stage-targets li{margin:.6rem 0}.path-scaffold{border:1px solid #a0b9c9;padding:.7rem;border-radius:.7rem;margin:1rem 0}

/* NhatCode V10 — instructor workbook */
.teacher-checklist{display:grid;gap:.65rem;margin:1rem 0}.teacher-check{display:flex;align-items:flex-start;gap:.65rem;line-height:1.55}.teacher-check input{margin-top:.3rem;flex:none}.teacher-evidence{display:grid;grid-template-columns:minmax(85px,140px) 1fr;gap:.45rem .9rem}.teacher-evidence dt{font-weight:700}.teacher-evidence dd{margin:0}.instructor-view details{margin:1rem 0;padding:1rem;border:1px solid #b9d8e8;border-radius:12px}
@media print{.header,.foot,.instructor-selects,.instructor-view button,#applications,#classroom-admin{display:none!important}#instructor-workspace{border:0!important;box-shadow:none!important}.instructor-view details{break-inside:avoid}.instructor-view{color:#000}}

[hidden]{display:none !important}
.turnstile-wrap{margin:1rem 0;min-height:65px}