.site-nav{max-width:1180px;margin:14px auto 0;padding:0 20px;display:flex;gap:8px;flex-wrap:wrap}.site-nav a{padding:10px 16px;border-radius:999px;text-decoration:none;font-weight:800;color:#0B5D32;background:#fff;border:1px solid #dde4ef}.site-nav a:hover{border-color:#107C41}
.academy-header,.mini-header{display:flex;align-items:center;gap:26px;padding:26px max(20px,calc((100% - 1180px)/2));background:white;border-bottom:1px solid #dde4ef}.academy-header img{width:180px}.mini-header img{width:120px}.academy-header h1,.mini-header h1{margin:3px 0;color:#0B5D32}.academy-header p,.mini-header p{margin:2px 0;color:#65718a}
.academy-wrap{max-width:1180px;margin:24px auto;padding:0 20px 50px}.hero-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:24px;background:white;border:1px solid #dde4ef;border-radius:20px;padding:30px}.hero-grid h2{font-size:clamp(28px,4vw,46px);line-height:1.08}.hero-actions,.course-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.cta{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;background:linear-gradient(90deg,#107C41,#ffb000);color:#171717;border-radius:11px;padding:12px 18px;font-weight:900;border:0;min-height:46px;cursor:pointer}.secondary-link{background:#0B5D32;color:white}
.hero-metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px}.hero-metrics div{background:#f7f9fd;border:1px solid #dde4ef;padding:16px;border-radius:14px}.hero-metrics b{display:block;font-size:28px;color:#0B5D32}.hero-metrics span{font-size:13px;color:#65718a}
.section-title{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:34px 0 14px}.section-title p{color:#65718a}.course-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.course-card{background:#fff;border:1px solid #dde4ef;border-radius:16px;padding:20px;display:flex;flex-direction:column}.course-card .course-no{font-size:12px;color:#107C41;font-weight:900;letter-spacing:.1em}.course-card h3{color:#0B5D32;margin:5px 0}.course-card p{color:#65718a;flex:1}.course-meta{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}.course-meta span,.tag{background:#eef3fa;color:#0B5D32;border-radius:999px;padding:5px 9px;font-size:12px;font-weight:800}.course-card a{font-weight:900;color:#107C41;text-decoration:none}
.learning-model{margin-top:34px;background:white;border:1px solid #dde4ef;border-radius:18px;padding:24px}.model-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.model-grid.six{grid-template-columns:repeat(3,1fr)}.model-grid article{background:#f8faff;padding:15px;border-radius:12px}.model-grid b{display:grid;width:32px;height:32px;place-items:center;border-radius:50%;background:#0B5D32;color:white}.model-grid h3{color:#0B5D32;margin:8px 0 4px}.model-grid p{font-size:13px;color:#65718a}
.course-hero{background:white;border:1px solid #dde4ef;border-radius:18px;padding:26px}.course-hero h2{font-size:34px;margin:4px 0}.course-hero p{color:#65718a}.outcomes{display:grid;grid-template-columns:1fr 1fr;gap:8px 24px}.module-card{background:white;border:1px solid #dde4ef;border-radius:15px;margin:12px 0;overflow:hidden}.module-head{background:#0B5D32;color:white;padding:14px 18px}.module-head h3{margin:0}.lesson-list{display:grid;grid-template-columns:1fr 1fr;padding:14px 22px;gap:7px 20px}.lesson-list a{color:#0B5D32;text-decoration:none}.lesson-list a:hover{color:#107C41;text-decoration:underline}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}.content-box{background:#fff;border:1px solid #dde4ef;border-radius:16px;padding:20px;margin-bottom:16px}.content-box h3,.content-box h2{color:#0B5D32}.tags{display:flex;gap:7px;flex-wrap:wrap}.assessment-box{margin-top:16px}
.exam-config{display:grid;grid-template-columns:1fr 1.8fr auto;align-items:end;gap:18px}.exam-summary{display:flex;gap:10px;flex-wrap:wrap}.exam-summary span{background:#f7f9fd;border:1px solid #dde4ef;border-radius:10px;padding:10px 12px;font-size:13px}.button-cta{font-size:15px}.exam-note{color:#65718a;font-size:13px}
.exam-meta{background:#0B5D32;color:white;border-radius:14px;padding:16px;margin:16px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}.exam-question{background:white;border:1px solid #dde4ef;border-radius:15px;padding:18px;margin:12px 0}.exam-question h3{margin:0 0 12px;color:#0B5D32}.exam-option{display:block;border:1px solid #dde4ef;padding:10px 12px;border-radius:10px;margin:7px 0;cursor:pointer}.exam-option input{width:auto;min-height:auto;margin-right:9px}.exam-actions{margin:18px 0}.exam-result-box{background:white;border:1px solid #dde4ef;border-radius:18px;padding:24px}.exam-score{font-size:44px;font-weight:900;color:#0B5D32}.pass{color:#116b3a}.fail{color:#a52b2b}.review-item{border-top:1px solid #dde4ef;padding:14px 0}.correct-answer{color:#116b3a;font-weight:800}.your-wrong{color:#a52b2b}
.lesson-breadcrumb{margin-bottom:12px}.lesson-breadcrumb a{color:#0B5D32;font-weight:800}.lesson-layout{display:grid;grid-template-columns:1.6fr .7fr;gap:18px;margin-top:18px}.lesson-main .content-box{padding:24px}.lesson-side .sticky-card{position:sticky;top:12px}.big-steps li{margin:10px 0;padding-left:6px}.lesson-nav{display:flex;justify-content:space-between;gap:10px;margin-top:18px}.nav-button{text-decoration:none;padding:12px 16px;border-radius:10px;font-weight:800}.muted{color:#65718a}
@media(max-width:850px){.hero-grid,.exam-config,.two-col,.lesson-layout{grid-template-columns:1fr}.course-grid{grid-template-columns:1fr}.model-grid,.model-grid.six{grid-template-columns:1fr 1fr}.lesson-list,.outcomes{grid-template-columns:1fr}.lesson-side .sticky-card{position:static}}@media(max-width:520px){.academy-header,.mini-header{align-items:flex-start;flex-direction:column}.model-grid,.model-grid.six{grid-template-columns:1fr}.hero-metrics{grid-template-columns:1fr 1fr}.section-title{align-items:flex-start;flex-direction:column}}

.path-grid,.project-grid,.main-feature-grid,.library-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.path-card,.project-card,.library-card{background:#fff;border:1px solid #dde4ef;border-radius:16px;padding:20px}
.path-card h3,.project-card h2,.project-card h3,.library-card h2{color:#0B5D32}
.path-card p,.project-card p,.library-card p{color:#65718a}.path-card ol{padding-left:20px}.path-card a,.project-card a,.library-card a{color:#107C41;font-weight:800;text-decoration:none}
.main-feature-grid{margin-top:32px}.lead-copy{font-size:18px;line-height:1.7}
.syntax-box{display:grid;gap:8px;margin-top:16px;background:#f6f8fc;padding:16px;border-radius:12px;border-left:4px solid #107C41}
.syntax-box code,.library-card code{display:block;background:#0B5D32;color:#fff;padding:10px 12px;border-radius:8px;overflow:auto;margin:5px 0 10px;font-size:14px}
.challenge-box{border-left:5px solid #ffb000}.mini-list{padding-left:18px;font-size:13px;color:#65718a}.mini-list li{margin:7px 0}
.module-head{display:flex;justify-content:space-between;align-items:center;gap:12px}.module-eyebrow{color:#ffb000!important}.module-head span{font-size:12px;opacity:.85}
.lesson-list li{list-style-position:outside}.lesson-list a{display:flex;gap:7px;align-items:center;justify-content:space-between;text-decoration:none;color:#14213d;border-bottom:1px solid #eef2f7;padding:7px 0}.lesson-list a span{font-size:12px;color:#107C41;white-space:nowrap}
.library-search{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center}.library-search label{grid-column:1/-1;font-weight:800;color:#0B5D32}.library-search input{font-size:16px;padding:12px;border:1px solid #c9d4e5;border-radius:10px}.library-search span{font-size:13px;color:#65718a}
@media(max-width:900px){.path-grid,.project-grid,.main-feature-grid,.library-grid{grid-template-columns:1fr 1fr}}
@media(max-width:580px){.path-grid,.project-grid,.main-feature-grid,.library-grid{grid-template-columns:1fr}.library-search{grid-template-columns:1fr}}

.formula-top-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:18px;margin-bottom:18px}.web-visual{background:#fff;border:1px solid #dde4ef;border-radius:16px;padding:12px;margin:0}.web-visual img,.lesson-concept-figure img,.course-hero-image{display:block;width:100%;height:auto;border-radius:12px}.web-visual figcaption,.lesson-concept-figure figcaption{font-size:12px;color:#65718a;padding-top:7px}.rich-guide-img{width:100%;height:auto;display:block;border:1px solid #dde4ef;border-radius:12px}
.big-code{display:block;background:#0B5D32;color:#fff;border-radius:10px;padding:16px 18px;font-size:18px;overflow:auto}.argument-table-wrap{overflow:auto;margin-top:16px}.argument-table{width:100%;border-collapse:collapse}.argument-table th,.argument-table td{padding:11px;border-bottom:1px solid #dde4ef;text-align:left;vertical-align:top}.argument-table th{background:#0B5D32;color:#fff}.argument-table code{font-size:12px}
.example-grid,.usecase-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.example-card,.usecase-grid article,.practice-task,.trouble-card{background:#f7f9fd;border:1px solid #dde4ef;border-radius:12px;padding:15px}.example-card code,.usecase-grid code{display:block;background:#0B5D32;color:#fff;padding:10px;border-radius:8px;overflow:auto}.trouble-card{margin:10px 0}.tag-link{text-decoration:none}.course-hero-image{margin-bottom:18px;max-height:430px;object-fit:cover}.lesson-concept-figure{background:#fff;border:1px solid #dde4ef;border-radius:16px;padding:12px;margin:18px 0}.lesson-concept-figure img{max-height:520px;object-fit:contain}.library-thumb{width:100%;aspect-ratio:1200/620;object-fit:cover;border:1px solid #dde4ef;border-radius:10px;margin-bottom:12px}
@media(max-width:850px){.formula-top-grid,.example-grid,.usecase-grid{grid-template-columns:1fr}}

.module-title-link{color:#fff;text-decoration:none}.module-title-link:hover{text-decoration:underline}
.module-lesson-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.module-lesson-card{border:1px solid #dde4ef;background:#f9fbfe;border-radius:12px;padding:15px}.module-lesson-card h3{color:#0B5D32}.module-lesson-card p{color:#65718a}.module-lesson-card a{color:#107C41;font-weight:800;text-decoration:none}
.project-thumb,.path-thumb{width:100%;height:auto;border-radius:11px;border:1px solid #dde4ef;margin-bottom:12px}
.rubric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.rubric-grid article{background:#f7f9fd;border:1px solid #dde4ef;border-radius:12px;padding:15px}
.path-detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.path-detail-card{background:#fff;border:1px solid #dde4ef;border-radius:16px;padding:20px}.path-detail-card img{width:100%;border-radius:12px;border:1px solid #dde4ef}.path-detail-card h2,.path-detail-card h3{color:#0B5D32}.path-detail-card a{color:#107C41;font-weight:800;text-decoration:none}
@media(max-width:800px){.module-lesson-grid,.rubric-grid,.path-detail-grid{grid-template-columns:1fr}}

.reference-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.reference-card{display:block;background:#fff;border:1px solid #dde4ef;border-radius:16px;padding:24px;text-decoration:none}.reference-card h2{color:#0B5D32}.reference-card p{color:#65718a}
.glossary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.glossary-card{background:#fff;border:1px solid #dde4ef;border-radius:14px;padding:16px}.glossary-card h3{color:#0B5D32;margin:4px 0}.glossary-card p{color:#65718a}
.trouble-grid,.cheat-grid,.case-grid,.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
@media(max-width:850px){.reference-grid,.glossary-grid,.trouble-grid,.cheat-grid,.case-grid,.faq-grid{grid-template-columns:1fr}}

.availability-note{margin-top:14px;padding:12px 14px;border-radius:10px;background:#fff7e9;border-left:4px solid #ff8a00;color:#6b3a00;font-size:14px}.sample-table-wrap{overflow:auto}.sample-table{width:100%;border-collapse:collapse;margin:10px 0 16px}.sample-table th,.sample-table td{padding:10px 12px;border:1px solid #dfe6ef;text-align:left}.sample-table th{background:#0B5D32;color:#fff}.sample-formula{display:grid;grid-template-columns:auto 1fr;gap:8px 12px;align-items:center;background:#f7f9fd;border:1px solid #dfe6ef;border-radius:12px;padding:16px}.sample-formula code{display:block;background:#0B5D32;color:white;padding:10px;border-radius:8px;overflow:auto}.sample-formula p{grid-column:1/-1;margin:4px 0 0;color:#65718a}.usecase-grid article p{color:#65718a;margin:5px 0 10px}

.formula-reference-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.formula-reference-card{display:grid;grid-template-columns:130px 1fr;gap:10px;align-items:center;border:1px solid #dfe6ef;border-radius:12px;padding:10px;text-decoration:none;color:#0B5D32}.formula-reference-card img{width:130px;border-radius:8px}.formula-reference-card span{color:#107C41;font-size:12px}@media(max-width:650px){.formula-reference-grid{grid-template-columns:1fr}.formula-reference-card{grid-template-columns:100px 1fr}.formula-reference-card img{width:100px}}

.usecase-grid{grid-template-columns:1fr!important}.usecase-detail-card,.nested-formula-card,.business-use-card,.nested-card{background:#fff;border:1px solid #dbe3ee;border-radius:16px;padding:20px}
.usecase-detail-card h3,.nested-formula-card h3,.business-use-card h2,.nested-card h2{color:#0B5D32}
.usecase-detail-card code,.nested-formula-card code,.business-use-card code,.nested-card code{display:block;background:#0B5D32;color:#fff;padding:12px 14px;border-radius:9px;overflow:auto;margin:10px 0 14px}
.usecase-detail-card h4,.nested-formula-card h4{color:#0B5D32;margin-bottom:5px}.usecase-detail-card details{margin-top:14px;background:#f7f9fd;border-radius:10px;padding:10px 12px}
.usecase-detail-card summary{font-weight:800;color:#0B5D32;cursor:pointer}.nested-formula-grid,.nested-grid,.business-use-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.nested-formula-card ol,.nested-formula-card ul,.business-use-card ol,.business-use-card ul,.nested-card ol,.nested-card ul{padding-left:22px}.business-use-card a{color:#107C41;font-weight:800;text-decoration:none}
@media(max-width:850px){.nested-formula-grid,.nested-grid,.business-use-grid{grid-template-columns:1fr}}

/* V9.1 UI RESTORATION */
body{background:linear-gradient(180deg,#f3f6fb 0,#f8f9fc 35%,#f4f7fb 100%)}
.site-nav{position:sticky;top:0;z-index:40;max-width:none;margin:0;padding:12px max(20px,calc((100% - 1180px)/2));background:rgba(246,248,252,.94);backdrop-filter:blur(12px);border-bottom:1px solid rgba(221,228,239,.9)}
.site-nav a{background:#fff;box-shadow:0 2px 7px rgba(5,38,92,.035)}.site-nav a.active{background:#0B5D32;color:#fff;border-color:#0B5D32}
.academy-header-premium{background:radial-gradient(circle at 80% 0,rgba(255,176,0,.12),transparent 30%),linear-gradient(125deg,#fff,#f7faff 70%);padding-top:32px;padding-bottom:32px}.academy-header-premium img{width:205px}.academy-header-premium h1{font-size:clamp(30px,4vw,48px);line-height:1.08;max-width:860px}.academy-header-premium p{max-width:900px;font-size:16px}
.hero-grid-premium{box-shadow:0 18px 55px rgba(5,38,92,.07);background:linear-gradient(140deg,#fff 0%,#fbfcff 58%,#F2F8F4 100%)}
.hero-grid-premium h2{margin-top:8px}.ghost-link{display:inline-flex;align-items:center;padding:12px 8px;text-decoration:none;color:#0B5D32;font-weight:900}
.hero-metrics{grid-template-columns:repeat(2,1fr)}.hero-metrics div{min-height:96px;display:flex;flex-direction:column;justify-content:center}.hero-metrics b{font-size:31px}.hero-metrics span{font-weight:700}
.learning-strip{display:grid;grid-template-columns:repeat(6,1fr);gap:9px;margin:16px 0 34px}.learning-strip article{display:flex;align-items:center;gap:9px;background:#fff;border:1px solid #dde4ef;border-radius:12px;padding:12px}.learning-strip b{display:grid;place-items:center;min-width:30px;height:30px;border-radius:50%;background:#0B5D32;color:#fff}.learning-strip span{font-size:13px;font-weight:800;color:#42506a}
.course-card{transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}.course-card:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(5,38,92,.08);border-color:#c9d7e9}.course-card h3{font-size:20px}.course-card>a{margin-top:5px}
.reference-home-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.reference-home-card{display:grid;grid-template-columns:58px 1fr;gap:16px;align-items:start;background:#fff;border:1px solid #dde4ef;border-radius:16px;padding:20px;text-decoration:none;box-shadow:0 5px 18px rgba(5,38,92,.035)}.reference-home-card:hover{border-color:#107C41}.reference-home-card h3{margin:1px 0 5px;color:#0B5D32}.reference-home-card p{margin:0;color:#65718a}.reference-icon{display:grid;place-items:center;width:54px;height:54px;border-radius:14px;background:linear-gradient(135deg,#0B5D32,#107C41);color:#fff;font-size:20px;font-weight:900}
.feature-box{min-height:240px;display:flex;flex-direction:column}.feature-box p{flex:1}.load-error{grid-column:1/-1;border-left:4px solid #107C41}
@media(max-width:950px){.learning-strip{grid-template-columns:repeat(3,1fr)}}@media(max-width:760px){.reference-home-grid{grid-template-columns:1fr}.academy-header-premium img{width:150px}}@media(max-width:520px){.learning-strip{grid-template-columns:1fr 1fr}.site-nav{position:static}}

.lab-course-grid,.lab-library-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.course-lab-card,.lab-library-card{background:#fff;border:1px solid #dbe3ee;border-radius:16px;padding:20px}.course-lab-card h3,.lab-library-card h2{color:#0B5D32}.course-lab-card a,.lab-library-card a{color:#107C41;font-weight:800;text-decoration:none}.lab-library-card details,.interview-q{background:#f7f9fd;border:1px solid #e1e7f0;border-radius:10px;padding:10px 12px;margin-top:12px}.review-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.review-strip span{background:#f7f9fd;border:1px solid #dde4ef;border-radius:10px;padding:12px;display:grid;gap:5px}.review-strip b{color:#107C41}.edge-case{background:#EEF7F1;border:1px solid #C7E5D2;border-radius:12px;padding:14px;margin:10px 0}.practice-drill-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.interview-q summary{font-weight:800;color:#0B5D32;cursor:pointer}@media(max-width:850px){.lab-course-grid,.lab-library-grid,.practice-drill-grid,.review-strip{grid-template-columns:1fr}}

.course-subtitle{margin-top:-8px;color:#107C41;font-size:22px}.module-subtitle{color:#65718a;max-width:850px;margin:7px 0 0}.module-view-all{display:inline-block;margin-top:14px;color:#107C41;font-weight:800;text-decoration:none}.subsection-block{margin:20px 0 30px;padding-top:6px}.subsection-block>h3{color:#0B5D32;font-size:24px;margin:6px 0 14px}.subsection-block+.subsection-block{border-top:1px solid #dde4ef;padding-top:24px}

.detailed-example-grid,.study-plan-grid,.checkpoint-grid,.capstone-grid,.debug-case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.practice-ladder{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.practice-ladder small{display:block;color:#65718a;margin-top:8px}.study-phase{border-top:1px solid #dde4ef;padding:12px 0}.study-phase:first-of-type{border-top:0}.compact-debug{margin:0}.compact-debug h3{font-size:18px}.checkpoint-grid details{margin-top:10px}.capstone-grid .tags{margin-top:12px}
@media(max-width:850px){.detailed-example-grid,.study-plan-grid,.checkpoint-grid,.capstone-grid,.debug-case-grid,.practice-ladder{grid-template-columns:1fr}}

.app-nav{gap:4px;overflow:auto;white-space:nowrap}.dashboard-hero{display:flex;align-items:center;justify-content:space-between;gap:20px}.dashboard-kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.dashboard-kpis>div{background:#f7f9fd;border:1px solid #dde4ef;border-radius:12px;padding:14px;text-align:center}.dashboard-kpis b{display:block;font-size:28px;color:#0B5D32}.dashboard-kpis span{font-size:12px;color:#65718a}.course-progress-grid,.achievement-grid,.skill-module-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.progress-track{height:10px;background:#e8edf5;border-radius:99px;overflow:hidden}.progress-track span{display:block;height:100%;background:#107C41}.achievement-card{border:1px solid #dde4ef;border-radius:16px;padding:18px;background:#fff}.achievement-card>b{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:50%;background:#0B5D32;color:#fff}.achievement-card.locked{opacity:.45}.note-snippet{border-top:1px solid #eef1f6;padding:10px 0}.search-filters{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}.search-filters button{border:1px solid #dde4ef;background:#fff;border-radius:999px;padding:7px 11px}.search-filters button.active{background:#0B5D32;color:#fff}.search-result{background:#fff;border:1px solid #dde4ef;border-radius:14px;padding:16px;margin:10px 0}.search-result a{color:#0B5D32;text-decoration:none}.flashcard-stage{max-width:780px;margin:30px auto;text-align:center}.flashcard{min-height:340px;border:1px solid #dde4ef;border-radius:22px;padding:42px;background:#fff;box-shadow:0 14px 40px rgba(5,38,92,.08)}.flashcard h2{font-size:30px;color:#0B5D32}.card-back{margin-top:24px;border-top:1px solid #dde4ef;padding-top:24px;font-size:20px}.review-buttons{display:flex;justify-content:center;gap:8px;margin-top:14px}.review-buttons button,.secondary-btn,.danger-btn{border:1px solid #cfd8e8;background:#fff;border-radius:9px;padding:10px 14px;font-weight:700}.danger-btn{border-color:#d46a6a;color:#9f1c1c}.daily-card{max-width:850px;margin:20px auto}.skill-course{margin-bottom:18px}.skill-module-card{border:1px solid #dde4ef;border-radius:12px;padding:14px}.skill-module-card a{color:#0B5D32;text-decoration:none}.app-action-panel{margin-bottom:16px}.app-actions{display:flex;gap:8px;margin:8px 0 12px}.app-action-panel textarea{min-height:90px;width:100%}.option-list{display:grid;gap:10px;margin:18px 0}.option-btn{border:1px solid #dbe3ee;background:#fff;border-radius:10px;padding:14px;text-align:left}.option-btn.selected{border-color:#107C41;background:#EEF7F1}@media(max-width:850px){.dashboard-hero{display:block}.dashboard-kpis{grid-template-columns:repeat(2,1fr);margin-top:16px}.course-progress-grid,.achievement-grid,.skill-module-grid{grid-template-columns:1fr}.app-nav{justify-content:flex-start}}

.scenario-grid,.compare-grid,.interview-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.scenario-grid article h3,.compare-grid article h3,.interview-grid article h3{color:#0B5D32}.scenario-grid details,.interview-grid details{margin-top:12px}.compare-grid a{color:#0B5D32;text-decoration:none}.formula-comparison-card{border:1px solid #dde4ef;border-radius:14px;padding:16px}.content-count-badge{display:inline-block;background:#E8F5ED;color:#0B5D32;border-radius:999px;padding:6px 10px;font-weight:800}
@media(max-width:850px){.scenario-grid,.compare-grid,.interview-grid{grid-template-columns:1fr}}


/* V16 — Fluent-inspired Excel UI system */
:root{
 --excel:#107C41;--excel-dark:#0B5D32;--excel-strong:#0F6B3A;--excel-soft:#EAF5EE;
 --canvas:#F6F8F7;--surface:#FFFFFF;--surface-2:#F1F5F2;--ink:#202020;--muted:#5F6B66;
 --line:#DDE5E0;--line-strong:#C8D5CD;--focus:#0F6CBD;--danger:#A4262C;
 --shadow:0 6px 24px rgba(20,55,38,.07);--radius:14px;--radius-lg:20px;
}
*{box-sizing:border-box;min-width:0}
html{overflow-x:hidden;background:var(--canvas)}
body{margin:0;overflow-x:hidden;background:var(--canvas);color:var(--ink);font-family:"Segoe UI",system-ui,-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;line-height:1.55}
a{color:var(--excel-dark)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
img,svg,canvas,video,iframe{max-width:100%;height:auto}
pre,code,kbd,samp{max-width:100%;overflow-wrap:anywhere;word-break:break-word}
pre{overflow:auto;white-space:pre-wrap}
table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse}
input,select,textarea,button{font:inherit;max-width:100%}
input,select,textarea{width:100%}
.content-box,.module-card,.course-card,.reference-record,.search-result,.achievement-card,.answer-card,.exam-setup-card,.exam-question-stage{overflow-wrap:anywhere;word-break:normal}
.academy-wrap{width:min(1200px,100%);max-width:1200px;margin:0 auto;padding:28px clamp(16px,3vw,32px) 64px}
.brand-watermark{display:none}
.eyebrow{color:var(--excel);font-weight:700;letter-spacing:.02em;text-transform:none;font-size:13px}
.content-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:none;padding:22px}
.content-box:hover{box-shadow:none}
.cta,.button-cta{background:var(--excel)!important;color:#fff!important;border:1px solid var(--excel)!important;border-radius:8px!important;padding:11px 16px!important;font-weight:650!important;box-shadow:none!important;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;min-height:44px}
.cta:hover,.button-cta:hover{background:var(--excel-dark)!important}
.secondary-btn,.secondary-btn-link,.secondary-link{background:#fff!important;color:var(--excel-dark)!important;border:1px solid var(--line-strong)!important;border-radius:8px!important;padding:10px 15px!important;text-decoration:none!important;font-weight:600!important;display:inline-flex;align-items:center;justify-content:center;min-height:44px}

/* Header + global nav */
.home-topbar,.mini-header.modern-header,.mini-header,.academy-header{background:#fff;border-bottom:1px solid var(--line)}
.home-topbar{height:68px;display:flex;align-items:center;justify-content:space-between;padding:0 max(18px,calc((100% - 1200px)/2));gap:20px}
.home-brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-weight:700}.home-brand img{width:92px;max-height:44px;object-fit:contain}.home-brand span{padding-left:12px;border-left:1px solid var(--line)}.top-search{font-weight:600;text-decoration:none}
.mini-header,.academy-header{padding:24px max(18px,calc((100% - 1200px)/2));gap:20px}.mini-header img,.academy-header img{width:112px;max-height:58px;object-fit:contain}.mini-header h1,.academy-header h1{color:var(--ink);font-size:clamp(25px,4vw,38px);line-height:1.16;margin:4px 0 5px}.mini-header p,.academy-header p{color:var(--muted);max-width:880px;margin:0}
.site-nav{position:sticky;top:0;z-index:60;max-width:none;margin:0;padding:0;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{width:min(1200px,100%);margin:auto;padding:8px clamp(12px,3vw,28px);display:flex;align-items:center;gap:4px}
.site-nav a,.nav-more>summary{display:flex;align-items:center;min-height:40px;padding:8px 12px;border:0!important;border-radius:8px;background:transparent!important;box-shadow:none!important;color:#333;text-decoration:none;font-weight:600;font-size:14px;cursor:pointer;white-space:nowrap}
.site-nav a:hover,.nav-more>summary:hover{background:var(--surface-2)!important;color:var(--excel-dark)}
.nav-more{margin-left:auto;position:relative}.nav-more>summary{list-style:none}.nav-more>summary::-webkit-details-marker{display:none}.nav-more>summary::after{content:'▾';margin-left:6px;color:var(--muted)}
.nav-menu{position:absolute;right:0;top:46px;width:220px;padding:8px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);display:grid;z-index:100}.nav-menu a{width:100%;white-space:normal}

/* New landing page */
.home-main{width:min(1200px,100%);margin:auto;padding:40px clamp(16px,3vw,32px) 72px}
.home-hero{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:28px;align-items:stretch;padding:44px;border:1px solid var(--line);border-radius:24px;background:#fff}
.hero-copy h1{font-size:clamp(38px,6vw,64px);line-height:1.02;letter-spacing:-.035em;margin:10px 0 18px;color:#1d1d1f;max-width:820px}.hero-copy>p{font-size:18px;color:var(--muted);max-width:720px}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin:26px 0 30px}.hero-proof{display:flex;gap:20px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:20px}.hero-proof span{font-size:13px;color:var(--muted)}.hero-proof b{display:block;color:var(--ink);font-size:22px}.excel-hero-panel{background:linear-gradient(145deg,var(--excel-dark),var(--excel));color:#fff;border-radius:18px;padding:28px;display:flex;flex-direction:column;justify-content:flex-end;gap:18px;min-height:330px}.excel-mark{width:86px;height:86px;display:grid;place-items:center;background:#fff;color:var(--excel);font-size:48px;font-weight:800;border-radius:14px}.excel-hero-panel strong{font-size:23px}.excel-hero-panel p{color:#e9f5ee;margin:7px 0 0}
.home-section{padding-top:54px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:20px}.section-heading span{color:var(--excel);font-weight:700;font-size:13px}.section-heading h2{margin:4px 0 0;font-size:clamp(26px,3.4vw,38px);letter-spacing:-.02em;color:var(--ink)}.section-heading>p{max-width:520px;color:var(--muted);margin:0}
.modern-course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.modern-course-card{display:grid!important;grid-template-columns:52px minmax(0,1fr);gap:16px;padding:22px!important;background:#fff!important;border:1px solid var(--line)!important;border-radius:14px!important;box-shadow:none!important;transform:none!important}.course-step{width:42px;height:42px;border-radius:10px;display:grid;place-items:center;background:var(--excel-soft);color:var(--excel-dark);font-weight:800}.course-level{font-size:12px;color:var(--muted);font-weight:600}.modern-course-card h3{margin:4px 0 3px;color:var(--ink);font-size:22px}.modern-course-card p{margin:0 0 14px;color:var(--muted)}.course-card-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.course-card-meta span{font-size:12px;padding:4px 8px;border-radius:999px;background:var(--surface-2);color:#46524c}.modern-course-card a{font-weight:650;text-decoration:none;color:var(--excel-dark)}
.three-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.action-card{display:block;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;text-decoration:none;color:var(--ink)}.action-card:hover{border-color:#A6CDB5}.action-icon{font-size:28px;color:var(--excel);margin-bottom:20px}.action-card h3{margin:0 0 7px}.action-card p{color:var(--muted);margin:0}.reference-shortcuts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.reference-shortcuts a{padding:16px;background:#fff;border:1px solid var(--line);border-radius:10px;text-decoration:none;font-weight:650;color:var(--ink)}.reference-shortcuts a:hover{background:var(--excel-soft);border-color:#B9D8C4}.my-learning-callout{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:30px;border-radius:18px;background:var(--excel-soft);border:1px solid #CDE3D4}.my-learning-callout span{color:var(--excel);font-weight:700}.my-learning-callout h2{margin:5px 0;color:var(--ink)}.my-learning-callout p{color:var(--muted);margin:0;max-width:700px}

/* Reference library */
.reference-intro{max-width:760px;margin-bottom:18px}.reference-intro h2{font-size:32px;margin:0 0 6px}.reference-intro p{color:var(--muted)}.reference-tabs{display:flex;gap:6px;flex-wrap:wrap;padding:10px 0 24px}.reference-tabs a{padding:8px 11px;border:1px solid var(--line);border-radius:8px;background:#fff;text-decoration:none;font-weight:600;font-size:13px}.reference-tile-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.reference-tile{display:block;padding:20px;background:#fff;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink)}.reference-tile>b{color:var(--excel);font-size:22px}.reference-tile h3{margin:16px 0 5px}.reference-tile p{color:var(--muted);font-size:14px;margin:0}.reference-toolbar{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:18px}.reference-toolbar>div:first-child{flex:1}.reference-toolbar label{display:block;font-weight:650;margin-bottom:6px}.reference-toolbar input{padding:11px 12px;border:1px solid var(--line-strong);border-radius:8px;background:#fff}.reference-count{color:var(--muted);white-space:nowrap}.reference-content{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.reference-record{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}.reference-record h3{color:var(--ink);margin:5px 0 7px}.reference-record p{color:#3c4741}.reference-record small{display:block;color:var(--muted);margin-top:8px}.record-meta{display:flex;gap:7px;flex-wrap:wrap}.record-meta span{font-size:11px;background:var(--surface-2);padding:3px 7px;border-radius:999px;color:#516059}.shortcut-row{display:flex;align-items:center;gap:14px;margin-top:12px}.shortcut-row kbd{background:#f5f5f5;border:1px solid #ccc;border-bottom-width:3px;border-radius:7px;padding:8px 11px;font-weight:700;white-space:normal}.shortcut-row h3{margin:0}.reference-record dl{display:grid;grid-template-columns:110px minmax(0,1fr);gap:7px 12px;margin:14px 0}.reference-record dt{font-weight:650;color:#404a45}.reference-record dd{margin:0;color:var(--muted)}.reference-record details{margin-top:14px}.reference-record summary{font-weight:650;cursor:pointer;color:var(--excel-dark)}.file-record{display:grid;grid-template-columns:95px minmax(0,1fr);gap:18px}.file-ext{height:70px;border-radius:10px;background:var(--excel-soft);display:grid;place-items:center;color:var(--excel-dark);font-size:18px;font-weight:800}

/* Exam */
.exam-setup-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px}.exam-setup-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding-bottom:22px;border-bottom:1px solid var(--line)}.exam-setup-heading span{color:var(--excel);font-weight:700}.exam-setup-heading h2{font-size:32px;margin:5px 0}.exam-setup-heading p{color:var(--muted);max-width:760px}.exam-bank-badge{text-align:right;min-width:120px}.exam-bank-badge b{display:block;font-size:34px;color:var(--excel-dark)}.exam-bank-badge span{font-size:12px;color:var(--muted)}.exam-controls{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;padding:22px 0}.exam-controls label{font-weight:650;font-size:13px}.exam-controls select{margin-top:6px;border:1px solid var(--line-strong);border-radius:8px;padding:10px;background:#fff}.exam-setup-footer{display:flex;align-items:center;justify-content:space-between;gap:24px}.exam-note{display:grid;gap:2px;max-width:720px}.exam-note span{color:var(--muted);font-size:13px}.exam-workspace{display:grid;grid-template-columns:260px minmax(0,1fr);gap:18px;align-items:start}.exam-sidebar{position:sticky;top:70px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;max-height:calc(100vh - 90px);overflow:auto}.exam-sidebar-head{display:flex;justify-content:space-between;gap:10px;font-size:13px}.exam-sidebar-head b{color:var(--excel-dark)}.exam-progress{height:7px;background:#edf1ee;border-radius:999px;overflow:hidden;margin:14px 0}.exam-progress span{display:block;height:100%;background:var(--excel);width:0}.question-nav{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin:12px 0 18px}.question-nav button{height:34px;border:1px solid var(--line);background:#fff;border-radius:7px}.question-nav button.answered{background:var(--excel-soft);border-color:#A6CDB5}.question-nav button.flagged{box-shadow:inset 0 0 0 2px #D59B00}.exam-legend{display:flex;gap:12px;flex-wrap:wrap;font-size:11px;color:var(--muted);margin-bottom:16px}.exam-legend i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:4px}.exam-legend .answered{background:var(--excel-soft);border:1px solid #A6CDB5}.exam-legend .flagged{border:2px solid #D59B00}.exam-question-stage{background:#fff;border:1px solid var(--line);border-radius:14px;padding:30px}.exam-question-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:13px}.exam-question-meta span+span{padding-left:10px;border-left:1px solid var(--line)}.flag-btn{margin-left:auto;background:transparent;border:1px solid var(--line);border-radius:7px;padding:7px 10px}.exam-question-stage h2{font-size:clamp(22px,3vw,30px);line-height:1.28;margin:18px 0 20px;color:var(--ink)}.exam-visual{display:block;width:min(760px,100%);margin:0 auto 24px;border:1px solid var(--line);border-radius:12px;background:#fff}.exam-options{display:grid;gap:10px}.exam-choice{display:grid;grid-template-columns:38px minmax(0,1fr);align-items:center;gap:10px;padding:14px;border:1px solid var(--line);border-radius:10px;cursor:pointer;background:#fff}.exam-choice:has(input:checked){border-color:var(--excel);background:var(--excel-soft)}.exam-choice input{position:absolute;opacity:0;pointer-events:none}.choice-letter{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#f1f4f2;font-weight:700}.exam-question-actions{display:flex;justify-content:space-between;margin-top:24px}.result-summary{display:flex;justify-content:space-between;align-items:center;gap:24px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px}.result-summary span{color:var(--excel);font-weight:700}.result-summary h2{font-size:32px;margin:5px 0}.result-score{width:120px;height:120px;border-radius:50%;display:grid;place-items:center;font-size:28px;font-weight:800}.result-score.pass{background:var(--excel-soft);color:var(--excel-dark)}.result-score.fail{background:#FDECEC;color:var(--danger)}.result-breakdown{margin:18px 0;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}.result-breakdown>div{display:grid;grid-template-columns:minmax(150px,1fr) 2fr 55px;gap:12px;align-items:center;padding:8px 0}.mini-progress{height:7px;background:#edf1ee;border-radius:999px;overflow:hidden}.mini-progress i{display:block;height:100%;background:var(--excel)}.answer-review{margin-top:26px}.answer-card{margin-bottom:12px;background:#fff;border:1px solid var(--line);border-left-width:4px;border-radius:12px;padding:20px}.answer-card.answer-ok{border-left-color:var(--excel)}.answer-card.answer-bad{border-left-color:var(--danger)}.answer-card-head{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:13px}.answer-card h3{color:var(--ink);font-size:19px}.answer-card a{font-weight:650}.explanation-box{background:var(--surface-2);padding:13px;border-radius:9px;margin:12px 0}.exam-answer-visual{display:block;width:min(680px,100%);border:1px solid var(--line);border-radius:10px;margin:14px 0}.result-actions{text-align:center;margin-top:22px}

/* Universal responsive/overflow hardening */
.course-grid,.path-grid,.project-grid,.main-feature-grid,.reference-home-grid,.lab-course-grid,.lab-library-grid,.practice-drill-grid,.scenario-grid,.compare-grid,.interview-grid,.detailed-example-grid,.study-plan-grid,.checkpoint-grid,.capstone-grid,.debug-case-grid,.course-progress-grid,.achievement-grid,.skill-module-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important}
.module-head,.section-title,.dashboard-hero,.review-strip,.app-actions{min-width:0;flex-wrap:wrap}
.lesson-list a,.module-title-link,.business-use-card a{overflow-wrap:anywhere}
.tags,.formula-tags,.course-meta,.hero-actions,.search-filters{flex-wrap:wrap}
textarea{resize:vertical}

@media(max-width:900px){
 .home-hero{grid-template-columns:1fr;padding:28px}.excel-hero-panel{min-height:220px}.three-card-grid{grid-template-columns:1fr}.reference-shortcuts{grid-template-columns:repeat(2,minmax(0,1fr))}.reference-tile-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.reference-content{grid-template-columns:1fr}.exam-controls{grid-template-columns:repeat(2,minmax(0,1fr))}.exam-workspace{grid-template-columns:1fr}.exam-sidebar{position:static;max-height:none}.question-nav{grid-template-columns:repeat(10,1fr)}
}
@media(max-width:680px){
 .home-topbar{height:auto;min-height:60px;padding:8px 14px}.home-brand img{width:76px}.home-brand span{display:none}.top-search{font-size:13px}.nav-inner{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:3px}.site-nav a,.nav-more>summary{justify-content:center;padding:7px 5px;font-size:12px;min-height:38px}.nav-more{margin-left:0;position:static}.nav-menu{position:absolute;left:8px;right:8px;top:auto;width:auto;margin-top:4px;grid-template-columns:repeat(2,minmax(0,1fr))}.modern-course-grid,.course-grid,.path-grid,.project-grid,.main-feature-grid,.reference-home-grid,.lab-course-grid,.lab-library-grid,.practice-drill-grid,.scenario-grid,.compare-grid,.interview-grid,.detailed-example-grid,.study-plan-grid,.checkpoint-grid,.capstone-grid,.debug-case-grid,.course-progress-grid,.achievement-grid,.skill-module-grid{grid-template-columns:1fr!important}.home-main{padding-top:22px}.home-hero{padding:22px;border-radius:16px}.hero-copy h1{font-size:38px}.hero-proof{gap:14px}.section-heading{display:block}.section-heading>p{margin-top:8px}.modern-course-card{grid-template-columns:42px minmax(0,1fr)}.reference-shortcuts,.reference-tile-grid{grid-template-columns:1fr}.my-learning-callout{display:block}.my-learning-callout .cta{margin-top:16px}.mini-header,.academy-header{display:grid;grid-template-columns:90px minmax(0,1fr);padding:16px}.mini-header img,.academy-header img{width:82px}.academy-wrap{padding:20px 14px 52px}.reference-toolbar{display:block}.reference-count{margin-top:8px}.file-record{grid-template-columns:1fr}.file-ext{width:95px}.exam-setup-card{padding:18px}.exam-setup-heading,.exam-setup-footer,.result-summary{display:block}.exam-bank-badge{text-align:left;margin-top:14px}.exam-controls{grid-template-columns:1fr}.exam-setup-footer .cta{margin-top:16px;width:100%}.exam-question-stage{padding:18px}.question-nav{grid-template-columns:repeat(8,1fr)}.result-score{margin-top:16px}.result-breakdown>div{grid-template-columns:1fr 50px}.result-breakdown .mini-progress{grid-column:1/-1;grid-row:2}.reference-record dl{grid-template-columns:1fr}.reference-record dt{margin-top:7px}
}
@media(max-width:360px){.nav-inner{grid-template-columns:repeat(2,minmax(0,1fr))}.question-nav{grid-template-columns:repeat(6,1fr)}.hero-copy h1{font-size:34px}}

/* ==========================================================
   V17 — Excel-inspired, Fluent-style UI reset
   ========================================================== */
:root{
 --excel:#107C41;--excel-dark:#185C37;--excel-bright:#21A366;--excel-soft:#EAF5EE;
 --ink:#242424;--muted:#616161;--surface:#FFFFFF;--surface-2:#F7F9F8;
 --line:#DCE5DF;--line-strong:#C7D6CD;--danger:#B42318;--warning:#8A5B00;
 --shadow:0 8px 28px rgba(24,92,55,.08);--radius:14px;
}
html,body{max-width:100%;overflow-x:hidden;background:var(--surface-2);color:var(--ink)}
body{font-family:"Segoe UI Variable","Segoe UI",Inter,system-ui,-apple-system,sans-serif}
body *{box-sizing:border-box;min-width:0}
img,svg,video,canvas,iframe{max-width:100%;height:auto}
p,li,dd,td,th,a,span,h1,h2,h3,h4,summary,label{overflow-wrap:anywhere}
pre,.big-code,.syntax-box code,.example-card code,.usecase-grid code,.library-card code{max-width:100%;overflow:auto}
input,select,textarea,button{max-width:100%;font:inherit}
table{max-width:none}.table-wrap,.argument-table-wrap{max-width:100%;overflow:auto}
.brand-watermark{display:none!important}
a{color:var(--excel)}
.cta{background:var(--excel)!important;color:#fff!important;border:1px solid var(--excel)!important;border-radius:8px!important;box-shadow:none!important}
.cta:hover{background:var(--excel-dark)!important}
.secondary-btn,.secondary-btn-link{display:inline-flex;align-items:center;justify-content:center;background:#fff;color:var(--excel-dark)!important;border:1px solid var(--line-strong)!important;border-radius:8px!important;padding:10px 15px;text-decoration:none;font-weight:650}
.content-box,.course-card,.module-card,.library-card,.project-card,.path-card{border-color:var(--line)!important;box-shadow:none!important;border-radius:12px!important;background:#fff}
.eyebrow,.section-heading>div>span,.section-heading>span{color:var(--excel)!important}
.mini-header,.academy-header{background:#fff!important;border-color:var(--line)!important}
.mini-header h1,.academy-header h1,.content-box h2,.content-box h3{color:var(--ink)!important}

/* App header/navigation */
.app-topbar{height:64px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(20px,calc((100% - 1200px)/2));gap:20px}
.app-brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.app-brand img{width:82px;display:block}.app-brand span{display:grid;line-height:1.08}.app-brand b{font-size:15px}.app-brand small{color:var(--muted);font-size:12px;margin-top:3px}
.topbar-actions{display:flex;align-items:center;gap:8px}.topbar-actions a{padding:8px 11px;border-radius:7px;text-decoration:none;color:var(--ink);font-weight:600}.topbar-profile{background:var(--excel-soft);color:var(--excel-dark)!important}
.site-nav.modern-nav,.site-nav{position:sticky;top:0;z-index:40;max-width:none!important;margin:0!important;padding:0!important;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{width:min(1200px,100%);margin:auto;padding:0 20px;display:flex;align-items:center;gap:3px;min-height:48px}
.site-nav a,.nav-more>summary{background:transparent!important;border:0!important;border-radius:6px!important;color:var(--muted)!important;padding:9px 12px!important;font-weight:600!important;min-height:auto}
.site-nav a:hover,.nav-more>summary:hover,.site-nav a.active{background:var(--excel-soft)!important;color:var(--excel-dark)!important}
.nav-more{margin-left:auto}.nav-menu{border:1px solid var(--line)!important;box-shadow:var(--shadow)!important}

/* V17 homepage */
.v17-home{width:min(1200px,100%);margin:auto;padding:34px 20px 72px}
.v17-hero{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(360px,.88fr);gap:54px;align-items:center;padding:54px 0 64px}
.v17-hero-copy h1{font-size:clamp(42px,5.5vw,70px);line-height:1.02;letter-spacing:-.045em;margin:10px 0 22px;color:var(--ink);max-width:820px}
.v17-hero-copy>p{font-size:19px;line-height:1.65;color:var(--muted);max-width:720px}
.v17-statline{display:flex;gap:22px;flex-wrap:wrap;margin-top:26px;padding-top:20px;border-top:1px solid var(--line)}
.v17-statline span{color:var(--muted);font-size:13px}.v17-statline b{color:var(--ink);font-size:18px;margin-right:4px}
.excel-workbook-demo{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 20px 60px rgba(24,92,55,.12);overflow:hidden;transform:rotate(1deg)}
.excel-demo-bar{height:48px;background:var(--excel-dark);color:#fff;display:flex;align-items:center;gap:10px;padding:0 14px;font-size:13px}
.excel-demo-icon{width:28px;height:28px;display:grid;place-items:center;background:var(--excel-bright);font-weight:800}
.excel-demo-ribbon{height:58px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:18px;padding:0 18px}
.excel-demo-ribbon i{display:block;width:50px;height:28px;border-radius:5px;background:var(--excel-soft);border:1px solid #D5E7DC}
.excel-grid-demo{display:grid;grid-template-columns:repeat(4,minmax(70px,1fr));font-size:12px}
.gcell{min-height:48px;display:flex;align-items:center;padding:8px 10px;border-right:1px solid #E8ECE9;border-bottom:1px solid #E8ECE9}.gcell.head{font-weight:700;color:var(--excel-dark);background:#F2F8F4}
.excel-demo-formula{margin:14px;background:#F2F8F4;border:1px solid #D5E7DC;border-radius:7px;padding:11px 13px;font-family:Consolas,monospace;color:var(--excel-dark)}
.v17-section{padding:42px 0;border-top:1px solid var(--line)}
.section-heading{display:flex;align-items:end;justify-content:space-between;gap:32px;margin:0 0 20px}.section-heading h2{font-size:32px;letter-spacing:-.025em;margin:3px 0;color:var(--ink)!important}.section-heading p{max-width:560px;color:var(--muted);margin:0}
.v17-course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.v17-course-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;display:grid;grid-template-columns:48px minmax(0,1fr);gap:16px;transition:.18s ease}
.v17-course-card:hover{border-color:#AFCABD;box-shadow:0 7px 25px rgba(24,92,55,.07);transform:translateY(-1px)}
.course-index{width:42px;height:42px;border-radius:9px;background:var(--excel-soft);color:var(--excel-dark);font-weight:800;display:grid;place-items:center}
.course-kicker{font-size:12px;color:var(--muted)}.v17-course-card h3{font-size:23px;margin:4px 0;color:var(--ink)}.v17-course-card p{margin:0 0 12px;color:var(--muted)}
.course-meta-clean{display:flex;gap:12px;color:var(--muted);font-size:12px;margin-bottom:14px}.v17-course-card>a{font-weight:700;text-decoration:none}
.v17-action-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.v17-action-grid>a{display:grid;gap:7px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;text-decoration:none;color:var(--ink);min-height:138px}.v17-action-grid>a:hover{border-color:#AFCABD;background:#FCFEFC}.v17-action-grid b{font-size:17px}.v17-action-grid span{font-size:13px;color:var(--muted)}
.v17-reference-row{display:flex;gap:8px;flex-wrap:wrap}.v17-reference-row a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 13px;text-decoration:none;color:var(--excel-dark);font-weight:600;font-size:13px}
.v17-exam-callout{margin-top:42px;border-radius:16px;background:var(--excel-dark);color:#fff;padding:30px;display:flex;align-items:center;justify-content:space-between;gap:30px}.v17-exam-callout span{color:#A7E2C1;font-size:12px;text-transform:uppercase;letter-spacing:.1em}.v17-exam-callout h2{font-size:30px;margin:5px 0 8px;color:#fff}.v17-exam-callout p{max-width:780px;color:#DCEBE2;margin:0}

/* Exam improvements */
.exam-setup-card,.exam-question-stage,.exam-sidebar,.result-summary,.result-breakdown,.answer-card{border-color:var(--line)!important;box-shadow:none!important}
.exam-bank-badge{background:var(--excel-soft)!important;color:var(--excel-dark)!important}.exam-progress span,.mini-progress i{background:var(--excel)!important}
.question-nav button.current{outline:2px solid var(--excel);outline-offset:1px}
.option-rationale{margin-top:12px;border-top:1px solid var(--line);padding-top:10px}.option-rationale summary{cursor:pointer;font-weight:650;color:var(--excel-dark)}.option-rationale li{margin:7px 0;color:var(--muted)}.option-rationale li.rationale-correct{color:var(--excel-dark)}
.exam-review-question-visual{display:block;width:min(680px,100%);border:1px solid var(--line);border-radius:10px;margin:14px 0}

/* Universal overflow protection */
.academy-wrap,.container,.home-main,.v17-home,.formula-wrap{max-width:100%}
.course-grid,.path-grid,.project-grid,.main-feature-grid,.library-grid,.example-grid,.usecase-grid,.module-lesson-grid,.scenario-grid,.compare-grid,.interview-grid,.detailed-example-grid,.practice-ladder,.study-plan-grid,.checkpoint-grid,.capstone-grid,.debug-case-grid,.course-progress-grid,.achievement-grid,.skill-module-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important}
.module-head,.section-title,.dashboard-hero,.app-actions,.hero-actions,.course-actions{min-width:0;flex-wrap:wrap}
.lesson-list a{display:grid!important;grid-template-columns:minmax(0,1fr) auto;gap:8px}
.web-visual,.lesson-concept-figure,.course-hero-image,.exam-visual,.exam-answer-visual{max-width:100%!important}
.argument-table-wrap,.table-wrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}
code{overflow-wrap:normal;word-break:normal}

/* Responsive breakpoints based on content reflow rather than fixed widths */
@media(max-width:1023px){
 .v17-hero{grid-template-columns:1fr;gap:34px}.excel-workbook-demo{max-width:720px;transform:none}.v17-action-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:700px){
 .app-topbar{padding:0 14px}.app-brand img{width:70px}.topbar-actions a:first-child{display:none}
 .nav-inner{padding:4px 8px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2px}.nav-more{margin:0;position:static}.nav-menu{left:8px!important;right:8px!important;width:auto!important}
 .v17-home{padding:18px 14px 50px}.v17-hero{padding:26px 0 42px}.v17-hero-copy h1{font-size:42px}.v17-hero-copy>p{font-size:17px}
 .v17-course-grid,.v17-action-grid,.course-grid,.path-grid,.project-grid,.main-feature-grid,.library-grid,.example-grid,.usecase-grid,.module-lesson-grid,.scenario-grid,.compare-grid,.interview-grid,.detailed-example-grid,.practice-ladder,.study-plan-grid,.checkpoint-grid,.capstone-grid,.debug-case-grid,.course-progress-grid,.achievement-grid,.skill-module-grid{grid-template-columns:1fr!important}
 .section-heading{display:block}.section-heading p{margin-top:8px}.v17-exam-callout{display:block}.v17-exam-callout .cta{margin-top:18px}
 .mini-header,.academy-header{padding:16px 14px!important;display:grid!important;grid-template-columns:76px minmax(0,1fr)!important;gap:14px!important}.mini-header img,.academy-header img{width:72px!important}
 .academy-wrap{padding-left:14px!important;padding-right:14px!important}
}
@media(max-width:420px){.v17-hero-copy h1{font-size:36px}.v17-statline{gap:12px}.nav-inner{grid-template-columns:repeat(2,minmax(0,1fr))}.excel-grid-demo{font-size:10px}.gcell{padding:6px;min-height:42px}}

.exam-case-context{background:#F2F8F4;border:1px solid #D5E7DC;border-left:4px solid #107C41;border-radius:9px;padding:13px 14px;margin:14px 0;color:#3F4A44;font-size:14px;line-height:1.55}

.cert-blueprint{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:14px 0 4px}.cert-blueprint>div{border:1px solid var(--line);border-radius:10px;background:#F7F9F8;padding:12px;text-align:center}.cert-blueprint b{display:block;color:var(--excel-dark);font-size:24px}.cert-blueprint span{font-size:12px;color:var(--muted)}.exam-visual{display:block!important;width:min(900px,100%);max-height:none!important;object-fit:contain!important;border:1px solid var(--line);border-radius:12px;background:#fff;margin:18px auto}.exam-visual.hidden{display:none!important}.home-logo{display:inline-flex;align-items:center}@media(max-width:700px){.cert-blueprint{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* V19 assessment / app hardening */
.certification-notice{width:min(1100px,100%);margin:18px auto;padding:12px 15px;border:1px solid #BFD8C8;background:#F2F8F4;border-radius:10px;color:#32473B;font-size:13px}.cert-standard-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.cert-standard-grid article{border:1px solid var(--line);border-radius:10px;padding:16px;background:#F8FAF9}.cert-standard-grid b{color:var(--excel-dark)}.exam-question-stage{overflow:hidden}.exam-choice{align-items:flex-start}.exam-choice>span:last-child{min-width:0;overflow-wrap:anywhere}.exam-visual,.exam-review-question-visual,.exam-answer-visual{width:min(100%,1000px)!important;max-height:none!important;object-fit:contain!important;margin-inline:auto!important;display:block}.answer-card{overflow:hidden}.answer-card img{background:#fff}.content-box,.module-card,.course-card,.search-result{overflow:hidden}.site-nav .nav-inner{overflow:visible}.nav-menu{max-height:min(70vh,520px);overflow:auto}.lesson-list a,.module-title-link,.reference-card a{overflow-wrap:anywhere}.formula-wrap,.academy-wrap{width:min(1200px,100%)}@media(max-width:700px){.cert-standard-grid{grid-template-columns:1fr}.exam-layout{grid-template-columns:1fr!important}.exam-sidebar{position:static!important}.question-nav{max-height:none!important}.answer-card{padding:14px!important}}

/* V20 production readiness */
.footer-legal{font-size:12px;color:var(--muted)}.footer-legal a{color:inherit}
.verify-form{display:flex;gap:10px;flex-wrap:wrap}.verify-form input{flex:1 1 360px;min-height:44px;border:1px solid var(--line);border-radius:8px;padding:10px 12px}
.cert-verify-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:16px 0}.cert-verify-grid>div{border:1px solid var(--line);border-radius:10px;padding:12px}.cert-verify-grid span{display:block;font-size:12px;color:var(--muted)}.cert-verify-grid b{display:block;margin-top:4px}
.admin-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.admin-grid label{display:grid;gap:5px}.admin-grid input,.admin-grid textarea{border:1px solid var(--line);border-radius:8px;padding:10px}.admin-grid textarea{min-height:110px}.checkline{display:flex!important;align-items:center!important;grid-column:1/-1}
.clean-table{width:100%;border-collapse:collapse}.clean-table th,.clean-table td{border-bottom:1px solid var(--line);padding:10px;text-align:left}
@media(max-width:700px){.cert-verify-grid,.admin-grid{grid-template-columns:1fr}}

.local-server-notice{border-left:4px solid #107C41;background:#F2F8F4;margin-top:14px}
.local-server-notice code{background:#fff;border:1px solid #DCE5DF;border-radius:5px;padding:2px 5px}

/* V23 Professional Mastery */
.mastery-center{padding-top:24px}.mastery-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(320px,.75fr);gap:28px;align-items:center;margin-bottom:22px}.mastery-hero h1{font-size:clamp(38px,5vw,64px);letter-spacing:-.04em;line-height:1.03;margin:8px 0 16px}.mastery-hero h1 span{color:#107C41}.mastery-hero p{font-size:17px;color:var(--muted);line-height:1.65}.mastery-kpis{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.mastery-kpis>div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}.mastery-kpis b{display:block;font-size:27px;color:#185C37}.mastery-kpis span{font-size:12px;color:var(--muted)}.mastery-filter{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.mastery-filter label{display:grid;gap:6px}.mastery-filter select,.formula-decision-search input{border:1px solid var(--line);border-radius:8px;padding:10px;background:#fff}.mastery-module-head{display:flex;align-items:center;justify-content:space-between;gap:20px}.mastery-ladder{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:9px;margin:14px 0 22px}.mastery-ladder article{border:1px solid var(--line);border-radius:10px;padding:13px;background:#F8FBF9}.mastery-ladder b{color:#107C41}.mastery-ladder p{font-size:13px;color:var(--muted)}.mastery-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.mastery-card details{margin-top:10px}.decision-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px}.decision-results article{border:1px solid var(--line);border-radius:10px;padding:14px}.decision-results h3{margin:4px 0}.industry-case-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}.professional-mastery-pack{border-left:4px solid #107C41}.mastery-pack-stats{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin:16px 0}.mastery-pack-stats>div{background:#F3F8F5;border-radius:9px;padding:11px}.mastery-pack-stats b{display:block;color:#185C37;font-size:20px}.mastery-pack-stats span{font-size:11px;color:var(--muted)}.mastery-pack-preview{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.mastery-pack-preview article{border-top:1px solid var(--line);padding-top:10px}.mastery-home-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.mastery-home-grid a{display:grid;gap:7px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;text-decoration:none;color:var(--ink)}.mastery-home-grid a b{color:#185C37}.mastery-home-grid a span{font-size:12px;color:var(--muted)}
@media(max-width:1000px){.mastery-ladder{grid-template-columns:repeat(2,minmax(0,1fr))}.mastery-pack-stats{grid-template-columns:repeat(3,minmax(0,1fr))}.mastery-home-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:700px){.mastery-hero{grid-template-columns:1fr}.mastery-filter,.mastery-card-grid,.decision-results,.industry-case-grid,.mastery-pack-preview,.mastery-home-grid{grid-template-columns:1fr}.mastery-ladder{grid-template-columns:1fr}.mastery-pack-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.mastery-module-head{display:block}.mastery-module-head a{margin-top:10px}}