*{box-sizing:border-box}:root{--navy:#0b1f3a;--blue:#0ea5e9;--sky:#eaf7fd;--ink:#0f172a;--muted:#526071;--line:#dbe3eb;--bg:#f5f8fb;--ok:#087443;--warn:#8a5a00;--bad:#a32222}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--ink)}a{color:#087db7}.container{max-width:1160px;margin:0 auto;padding:0 18px}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.header-inner{height:76px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy);font-weight:900}.brand img{width:54px;height:54px;object-fit:contain}.site-header nav{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.site-header nav a{text-decoration:none;color:var(--navy);font-weight:800;font-size:14px}.site-header .nav-cta,.btn.primary{background:var(--blue);color:#fff}.hero{margin:28px 0;padding:34px;border-radius:22px;background:linear-gradient(135deg,#fff,#edf8fd);border:1px solid var(--line);box-shadow:0 16px 40px rgba(11,31,58,.08)}h1{font-size:clamp(30px,5vw,52px);line-height:1.05;margin:0 0 12px;color:var(--navy)}h2{color:var(--navy)}p{line-height:1.65}.muted{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}.card{grid-column:span 12;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:0 8px 22px rgba(15,23,42,.05)}@media(min-width:760px){.half{grid-column:span 6}.third{grid-column:span 4}.quarter{grid-column:span 3}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;text-decoration:none;border:1px solid var(--navy);border-radius:11px;padding:10px 14px;font-weight:800;color:var(--navy);background:#fff;cursor:pointer}.btn.navy{background:var(--navy);color:#fff}.btn.small{padding:7px 10px;font-size:13px}.actions{display:flex;gap:10px;flex-wrap:wrap}.pill{display:inline-block;border-radius:999px;padding:5px 9px;font-weight:800;font-size:12px;background:#eef4f8;color:var(--navy)}.pill.ok{background:#e7f7ef;color:var(--ok)}.pill.warn{background:#fff4d8;color:var(--warn)}.pill.bad{background:#fdeaea;color:var(--bad)}.progress{height:10px;background:#e7edf2;border-radius:20px;overflow:hidden}.progress>span{display:block;height:100%;background:var(--blue)}table{width:100%;border-collapse:collapse;background:#fff}th,td{text-align:left;padding:10px;border-bottom:1px solid var(--line);vertical-align:top}input,select,textarea{width:100%;padding:10px 12px;border:1px solid #cbd5e1;border-radius:9px;font:inherit}label{display:block;font-weight:800;margin:10px 0 5px}.notice{padding:12px 14px;border-radius:12px;background:#eef8fd;border:1px solid #cdeaf8}.error{padding:12px 14px;border-radius:12px;background:#fdeaea;border:1px solid #f5c2c2;color:#7d1717}.success{padding:12px 14px;border-radius:12px;background:#e8f7ef;border:1px solid #bee8d1;color:#075d36}.question{font-size:22px;line-height:1.4}.choice{display:block;border:1px solid var(--line);padding:12px;border-radius:11px;margin:9px 0;background:#fff}.choice:hover{border-color:var(--blue);background:#f7fcff}.choice input{width:auto;margin-right:9px}.testbar{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}.qnav{display:flex;gap:5px;flex-wrap:wrap}.qnav a{width:34px;height:34px;border:1px solid var(--line);border-radius:8px;display:inline-flex;align-items:center;justify-content:center;text-decoration:none;font-size:12px;background:#fff}.qnav a.done{background:#e8f7ef}.qnav a.current{border:2px solid var(--blue)}.flashcard{min-height:220px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:28px}.flashcard .term{font-size:26px;font-weight:900;color:var(--navy)}.footer{margin-top:42px;padding:30px 0;color:var(--muted);font-size:13px}.stat{font-size:30px;font-weight:900;color:var(--navy)}.section-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-top:24px}@media(max-width:700px){.header-inner{height:auto;padding-top:10px;padding-bottom:10px;align-items:flex-start}.site-header nav{justify-content:flex-end}.brand span{display:none}.hero{padding:22px}.question{font-size:19px}}.locked-card{opacity:.88;background:#fbfcfd}.lock-reason{margin-top:12px;padding:10px 12px;border-radius:10px;background:#f4f6f8;border:1px solid var(--line);color:var(--muted);font-size:13px;font-weight:700}.locked-action{display:inline-flex;align-items:center;padding:10px 12px;border-radius:10px;background:#f4f6f8;border:1px solid var(--line);font-size:13px;font-weight:800;color:var(--muted)}.class-steps{align-items:stretch}.step-card{position:relative;padding-top:52px}.step-number{position:absolute;top:16px;left:18px;width:28px;height:28px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:var(--navy);color:#fff;font-weight:900}.review-card{border-color:#f0d79b}.review-note{padding:10px 12px;border-radius:10px;background:#fff8e6;border:1px solid #f0d79b;color:#6d4b00;font-size:13px;line-height:1.5}details.card summary{cursor:pointer;color:var(--navy)}
.priority-card{border:2px solid #0ea5e9;background:linear-gradient(135deg,#fff,#eef9ff)}.personalized-note{padding:10px 12px;border-radius:10px;background:#eef8fd;border:1px solid #cdeaf8;color:#24455c;font-size:13px;line-height:1.5}.referral-card{padding:16px}.inset-card{box-shadow:none;background:#fbfdff}.copy-row{display:flex;gap:8px;align-items:center}.copy-row input{flex:1}.share-actions{margin-top:12px}.small-text{font-size:12px}.ref-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:16px}.ref-stats>div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:4px}.ref-stats strong{font-size:22px;color:var(--navy)}.ref-stats span{font-size:12px;color:var(--muted);font-weight:700}@media(min-width:760px){.ref-stats{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(max-width:700px){.copy-row{flex-direction:column;align-items:stretch}.share-actions .btn{flex:1 1 42%}}

.ad-preview-wrap{border:1px solid var(--line);border-radius:14px;background:#fff;padding:12px;display:flex;align-items:center;justify-content:center}.ad-preview{display:block;max-width:100%;height:auto;border-radius:10px;box-shadow:0 8px 22px rgba(15,23,42,.08)}.ad-copy-box{min-height:220px;resize:vertical;line-height:1.55;background:#f8fbfd}@media(max-width:700px){.ad-copy-box{min-height:260px}}

.referral-banner{margin:18px 0 8px;padding:20px 22px;border-radius:16px;background:linear-gradient(135deg,#0b1f3a,#14365f);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:18px;box-shadow:0 10px 26px rgba(11,31,58,.16)}.referral-banner h2{color:#fff;margin:8px 0 6px}.referral-banner p{margin:0;max-width:780px}.referral-banner .btn{border-color:#fff}.referral-banner .btn.navy{background:#fff;color:#0b1f3a}.referral-explainer{margin-top:18px;padding:18px;border:1px solid var(--line);border-radius:14px;background:#f8fbfd}.referral-explainer h3{margin-top:0}.referral-steps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.referral-steps>div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;position:relative}.referral-steps>div>span{display:inline-flex;width:26px;height:26px;border-radius:50%;align-items:center;justify-content:center;background:var(--navy);color:#fff;font-weight:900;margin-right:7px}.referral-steps p{font-size:13px;color:var(--muted);margin-bottom:0}.referral-landing{padding-bottom:30px}.referral-hero{padding:20px}.referral-hero-copy,.referral-hero-media{box-shadow:none}.referral-hero-media{display:flex;align-items:center;justify-content:center;background:#f8fbfd}.referral-hero-media img{max-width:100%;height:auto;border-radius:14px}.invite-note{padding:10px 12px;border-radius:10px;background:#e8f7ef;border:1px solid #bee8d1}.landing-section{margin:26px 0}.step-badge{display:inline-flex;width:34px;height:34px;border-radius:50%;align-items:center;justify-content:center;background:var(--navy);color:#fff;font-weight:900}.value-section .card,.final-cta .card{padding:28px;background:linear-gradient(135deg,#fff,#eef9ff)}.final-cta{text-align:center}.final-cta .card{max-width:820px;margin:0 auto}.referral-landing h3{color:var(--navy)}@media(max-width:700px){.referral-banner{flex-direction:column;align-items:flex-start}.referral-steps{grid-template-columns:1fr}}

.class-hero-native{padding-bottom:24px}.class-hero-status{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}.class-jump-nav{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}.class-jump-nav a{display:inline-flex;text-decoration:none;border:1px solid var(--line);background:#fff;color:var(--navy);padding:8px 11px;border-radius:999px;font-size:13px;font-weight:800}.native-class-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:18px}.native-class-main{display:flex;flex-direction:column;gap:18px}.native-section-title{display:flex;align-items:flex-start;gap:12px}.native-section-title h2{margin:0 0 4px}.step-number-inline{width:32px;height:32px;flex:0 0 32px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:var(--navy);color:#fff;font-weight:900}.lesson-content{margin-top:18px;line-height:1.7}.lesson-content h3{margin:28px 0 8px;color:var(--navy);font-size:20px}.lesson-content p{margin:8px 0 12px}.lesson-list{padding-left:24px;line-height:1.7}.lesson-list li{margin:5px 0}.mastery-native{border:2px solid #b9dff1;background:linear-gradient(135deg,#fff,#f2fbff)}.progress-row{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}.progress-row:last-of-type{border-bottom:0}.sticky-progress-card hr{border:0;border-top:1px solid var(--line);margin:14px 0}.optional-external summary{cursor:pointer;color:var(--navy)}@media(min-width:960px){.native-class-grid{grid-template-columns:minmax(0,2fr) minmax(280px,.75fr)}.sticky-progress-card{position:sticky;top:96px}}

.course-shell-hero{margin:28px 0 0;background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px;box-shadow:0 10px 28px rgba(11,31,58,.06)}.course-shell-topline{display:flex;justify-content:space-between;gap:22px;align-items:flex-start}.course-eyebrow{font-size:12px;font-weight:900;letter-spacing:.08em;color:#0b6f9f;margin-bottom:10px}.course-description{max-width:850px;color:var(--muted);font-size:17px}.course-status-stack{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}.course-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:22px}.course-metrics>div{border:1px solid var(--line);border-radius:14px;padding:14px;background:#fbfdff;display:flex;flex-direction:column;gap:3px}.course-metrics span{font-size:12px;color:var(--muted);font-weight:800}.course-metrics strong{font-size:24px;color:var(--navy)}.course-metrics small{color:var(--muted)}.mistake-review-link{display:inline-flex;margin-top:16px;font-weight:900;text-decoration:none;color:#9a3412}.course-tabs{display:flex;gap:8px;margin:18px 0;border-bottom:1px solid var(--line)}.course-tabs a{text-decoration:none;font-weight:900;color:var(--muted);padding:12px 18px;border-bottom:3px solid transparent}.course-tabs a.active{color:#087db7;border-bottom-color:var(--blue);background:#eef9ff;border-radius:10px 10px 0 0}.module-sequence-card{display:flex;gap:16px;align-items:center;margin-bottom:16px}.module-intro-icon{width:46px;height:46px;border-radius:12px;background:#eaf7fd;display:flex;align-items:center;justify-content:center;font-size:24px;color:#087db7}.course-module-list{display:flex;flex-direction:column;gap:16px}.course-module-card{display:flex;gap:18px;padding:24px}.module-number{flex:0 0 42px;width:42px;height:42px;border-radius:50%;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:18px}.module-body{flex:1}.module-body h2{margin-top:4px}.module-activity-list{display:flex;flex-direction:column;gap:8px;margin-top:14px}.module-activity{display:flex;gap:12px;align-items:center;border-top:1px solid var(--line);padding:12px 4px;color:var(--ink);text-decoration:none}.module-activity.clickable:hover{background:#f8fcff}.module-activity>div{display:flex;flex-direction:column;gap:3px}.module-activity small{color:var(--muted)}.activity-icon{width:34px;height:34px;border-radius:10px;background:#eef8fd;display:flex;align-items:center;justify-content:center;font-weight:900;color:#087db7}.activity-arrow{margin-left:auto;font-size:24px;color:#7b8794}.class-next-actions{margin-top:16px;display:flex;justify-content:space-between;gap:18px;align-items:center}.activity-dashboard-grid,.materials-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}.activity-dashboard-card,.material-card{grid-column:span 12}.activity-kicker{width:32px;height:32px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:var(--navy);color:#fff;font-weight:900}.mastery-card{border:2px solid #0b1f3a}.material-icon{display:inline-flex;width:42px;height:42px;border-radius:12px;align-items:center;justify-content:center;background:#eef8fd;color:#087db7;font-size:21px;font-weight:900}.optional-material{background:#fbfdff}.class-footer-actions{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}.mistake-list{display:flex;flex-direction:column;gap:16px}.mistake-top{display:flex;gap:8px;flex-wrap:wrap}.answer-compare{display:grid;grid-template-columns:1fr;gap:10px;margin:14px 0}.answer-compare>div{border:1px solid var(--line);border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:5px}.answer-compare span{font-size:12px;color:var(--muted);font-weight:800}.warn-btn{border-color:#a16207;color:#7c4a03;background:#fff9e8}@media(min-width:760px){.course-metrics{grid-template-columns:repeat(4,minmax(0,1fr))}.activity-dashboard-card,.material-card{grid-column:span 6}.answer-compare{grid-template-columns:1fr 1fr}}@media(max-width:700px){.course-shell-topline,.class-next-actions{flex-direction:column}.course-status-stack{justify-content:flex-start}.course-module-card{padding:18px}.course-tabs{overflow-x:auto}}


/* v11 referral toolkit layout fix — prevent large ad image from forcing grid columns wider */
.grid{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid>.card,.half{min-width:0}
.ad-preview-wrap{width:100%;max-width:520px;margin:0 auto;overflow:hidden}
.ad-preview{display:block;width:100%;max-width:100%;height:auto;object-fit:contain}
.ad-copy-box{display:block;width:100%;max-width:100%;min-width:0}
@media(max-width:759px){.half{grid-column:span 12}.ad-preview-wrap{max-width:480px}}


/* v12 matching question layout */
@media(max-width:700px){.matching-row{grid-template-columns:1fr!important}.choice-select{min-width:0}}
.course-video-panel{margin:20px 0;display:grid;grid-template-columns:minmax(220px,.8fr) minmax(320px,1.7fr);gap:22px;align-items:center}.course-video-panel video{display:block;width:100%;max-height:620px;background:#061426;border-radius:14px;box-shadow:0 12px 34px rgba(6,20,38,.18)}.activity-dashboard-card .btn+.btn,.material-card .btn+.btn{margin-top:10px}@media(max-width:760px){.course-video-panel{grid-template-columns:1fr}}

/* LPP_SECTION_LECTURE_STYLES */
.lecture-video-card{margin-bottom:18px;padding:20px;background:#fff}
.lecture-video-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:14px}
.lecture-video-heading h2{margin:5px 0 0}
.lecture-player{display:block;width:100%;max-height:72vh;background:#061827;border-radius:12px;box-shadow:0 12px 28px rgba(6,24,39,.18)}
.lecture-video-note{margin:14px 0 0;line-height:1.55}
@media(max-width:640px){.lecture-video-card{padding:14px}.lecture-video-heading{align-items:flex-start}.lecture-player{border-radius:8px}}