:root{
  --bg:#f4f7f5;
  --surface:#ffffff;
  --surface-2:#eef4f1;
  --text:#10231d;
  --muted:#66756f;
  --line:#dce5e1;
  --brand:#0b5b46;
  --brand-2:#093f33;
  --brand-soft:#e3f0eb;
  --danger:#9f3434;
  --shadow:0 20px 60px rgba(15,45,35,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
body.modal-open{overflow:hidden}
a{text-decoration:none;color:inherit}
button,input,textarea,select{font:inherit}
img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 32px));margin:auto}
.header{
  position:sticky;top:0;z-index:30;
  background:rgba(255,255,255,.92);backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(220,229,225,.9)
}
.header-inner{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:900;letter-spacing:-.035em}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-weight:950
}
.nav{display:flex;align-items:center;gap:24px;color:var(--muted);font-size:14px;font-weight:750}
.nav a:hover{color:var(--brand)}
.nav-btn{border:1px solid var(--line);background:#fff;padding:10px 14px;border-radius:10px}
.hero{padding:84px 0 70px;background:linear-gradient(180deg,#f8fbf9 0%,#eef5f2 100%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:54px}
.hero-copy h1,.page-hero h1,.course-main h1,.welcome h1,.auth-copy h1{
  font-size:clamp(44px,6.6vw,78px);line-height:.98;letter-spacing:-.058em;margin:13px 0 22px
}
.hero-copy p,.page-hero p,.lead,.auth-copy p{
  font-size:19px;line-height:1.7;color:var(--muted);max-width:700px
}
.hero-art{padding:20px}
.hero-art img{filter:drop-shadow(0 30px 50px rgba(7,63,51,.13))}
.eyebrow{font-size:11px;letter-spacing:.17em;font-weight:900;color:var(--brand)}
.eyebrow.light{color:#bfe4d7}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{
  border:0;border-radius:12px;padding:14px 19px;background:var(--brand);color:white;
  display:inline-flex;align-items:center;justify-content:center;font-weight:850;cursor:pointer
}
.btn:hover{background:var(--brand-2)}
.btn.ghost{background:transparent;color:var(--brand);border:1px solid #bfd1ca}
.btn.ghost-dark{background:#fff;color:var(--brand);border:1px solid var(--line)}
.btn.secondary{background:var(--brand-soft);color:var(--brand-2)}
.btn.danger{background:#f4e6e6;color:var(--danger)}
.btn.light-btn{background:#fff;color:var(--brand-2)}
.btn.full{width:100%}
.btn.small{padding:11px 14px;font-size:14px}
.btn.tiny{padding:8px 10px;font-size:12px;margin:0}
.hero-note{display:flex;gap:16px;flex-wrap:wrap;margin-top:28px;color:var(--muted);font-size:13px;font-weight:700}
.stats-strip{background:var(--brand-2);color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:27px 0}
.stats-grid>div{display:grid;gap:4px;padding:0 24px;border-right:1px solid rgba(255,255,255,.12)}
.stats-grid>div:first-child{padding-left:0}
.stats-grid>div:last-child{border:0}
.stats-grid strong{font-size:28px}
.stats-grid span{font-size:13px;color:#c6d8d2}
.section{padding:82px 0}
.page-section{padding-top:30px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:28px}
.section-head.centered{justify-content:center;text-align:center}
.section-head h2,.content-block h2,.cta h2{
  margin:9px 0 0;font-size:42px;letter-spacing:-.045em;line-height:1.05
}
.text-link{font-weight:850;color:var(--brand)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card,.panel,.feature-card,.profile-summary{
  border:1px solid var(--line);background:var(--surface);border-radius:18px;box-shadow:0 8px 30px rgba(15,45,35,.03)
}
.course-card{overflow:hidden;transition:.2s ease}
.course-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.course-thumb{aspect-ratio:16/9;background:var(--surface-2);position:relative;overflow:hidden}
.course-thumb img{width:100%;height:100%;object-fit:cover}
.level{position:absolute;left:13px;top:13px;background:rgba(255,255,255,.92);padding:7px 9px;border-radius:8px;font-size:11px;font-weight:900}
.card-body{padding:22px}
.card-body h3{font-size:24px;letter-spacing:-.03em;margin:8px 0 9px}
.card-body p{color:var(--muted);line-height:1.58;margin:0 0 18px}
.meta{font-size:12px;font-weight:850;color:var(--brand)}
.soft-section{background:#eaf2ef}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:30px}
.steps article{background:#fff;border:1px solid var(--line);border-radius:17px;padding:24px}
.steps article>span{font-size:12px;font-weight:950;color:var(--brand)}
.steps h3{font-size:19px;margin:28px 0 8px}
.steps p{color:var(--muted);line-height:1.55;font-size:14px}
.split-feature{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.split-feature h2{font-size:48px;letter-spacing:-.05em;line-height:1.03;margin:11px 0}
.lead-small{font-size:18px;color:var(--muted);line-height:1.7}
.check-list{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:12px}
.check-list li{padding-left:28px;position:relative;font-weight:700}
.check-list li:before{content:"✓";position:absolute;left:0;color:var(--brand)}
.cta{
  background:var(--brand-2);color:#fff;border-radius:24px;padding:44px;
  display:flex;justify-content:space-between;align-items:center;gap:30px
}
.cta p{color:#c6d8d2;margin-bottom:0}
.page-hero{padding:80px 0 28px}
.page-hero h1{font-size:62px;max-width:850px}
.compact-hero{padding-bottom:10px}
.about-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature-card{padding:28px}
.feature-card img{width:48px;height:48px;margin-bottom:28px}
.feature-card h3{font-size:22px;margin:0 0 8px}
.feature-card p{color:var(--muted);line-height:1.6}
.content-block{max-width:820px}
.content-block p{font-size:18px;color:var(--muted);line-height:1.75}
.auth-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;padding:70px 0}
.auth-copy>img{width:82%;margin:34px 0}
.auth-panels{display:grid;gap:18px}
.panel{padding:27px}
.form-panel h2{font-size:28px;letter-spacing:-.035em;margin:8px 0 22px}
label{display:block;font-size:12px;font-weight:900;margin:16px 0 7px}
input,textarea,select{
  width:100%;border:1px solid var(--line);border-radius:11px;padding:13px 14px;background:#fff;outline:none;color:var(--text)
}
input:focus,textarea:focus,select:focus{border-color:#7aa696;box-shadow:0 0 0 3px rgba(11,91,70,.08)}
textarea{resize:vertical}
.form-panel small,.panel small{display:block;color:var(--muted);line-height:1.45;margin-top:10px}
.demo-box{background:var(--brand-soft);border-radius:12px;padding:15px 17px;display:grid;gap:3px;width:max-content}
.dashboard-top{padding:62px 0 28px;display:flex;justify-content:space-between;gap:30px;align-items:center}
.welcome h1{font-size:54px;margin-bottom:10px}
.welcome p{color:var(--muted);font-size:17px}
.progress-ring-card{
  min-width:285px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;
  display:flex;align-items:center;gap:16px
}
.progress-ring{
  --p:0;width:72px;height:72px;border-radius:50%;
  background:conic-gradient(var(--brand) calc(var(--p)*1%),#e6eeeb 0);
  display:grid;place-items:center;position:relative
}
.progress-ring:after{content:"";position:absolute;width:56px;height:56px;border-radius:50%;background:#fff}
.progress-ring span{position:relative;z-index:2;font-weight:900}
.progress-ring-card>div:last-child{display:grid;gap:4px}
.progress-ring-card>div:last-child span{color:var(--muted);font-size:13px}
.dashboard-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.dashboard-stats>div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;display:grid;gap:4px}
.dashboard-stats strong{font-size:24px}
.dashboard-stats span{font-size:12px;color:var(--muted)}
.progress-line{height:7px;border-radius:999px;background:#e5eeea;overflow:hidden}
.progress-line span{display:block;height:100%;background:var(--brand);border-radius:999px}
.progress-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;margin:7px 0 15px}
.profile-layout{display:grid;grid-template-columns:320px 1fr;gap:18px;padding:20px 0 80px}
.profile-summary{text-align:center;padding:34px 24px}
.profile-summary h2{margin:16px 0 4px}
.profile-summary p{color:var(--muted)}
.avatar{
  width:64px;height:64px;border-radius:50%;display:grid;place-items:center;background:var(--brand);color:#fff;font-weight:950;font-size:24px
}
.avatar.large{width:84px;height:84px;font-size:30px;margin:auto}
.status{display:inline-flex;padding:7px 10px;border-radius:999px;font-size:11px;font-weight:900}
.status.success{background:var(--brand-soft);color:var(--brand)}
.course-layout{display:grid;grid-template-columns:390px 1fr;gap:58px;padding:55px 0 80px}
.toc{align-self:start;position:sticky;top:96px}
.toc h2{font-size:29px;letter-spacing:-.04em;margin:10px 0 18px}
.course-progress-box{background:#fff;border:1px solid var(--line);border-radius:13px;padding:14px;margin-bottom:15px}
.course-progress-box>div:first-child{display:flex;justify-content:space-between;font-size:12px;margin-bottom:10px}
.lesson-list{display:grid;gap:7px;max-height:68vh;overflow:auto;padding-right:4px}
.lesson-list button{
  width:100%;border:1px solid var(--line);background:#fff;border-radius:12px;padding:13px;
  display:grid;grid-template-columns:34px 1fr 24px;gap:8px;align-items:center;text-align:left;cursor:pointer;color:var(--text)
}
.lesson-list button:hover{border-color:#85ad9f}
.lesson-list button.done{background:#f0f6f3}
.lesson-no{font-size:11px;font-weight:900;color:var(--brand)}
.lesson-title{font-size:13px;font-weight:750;line-height:1.35}
.check{color:var(--brand);font-weight:900;text-align:right}
.course-main h1{font-size:60px;max-width:800px}
.course-overview{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:34px 0}
.course-overview>div{background:#fff;border:1px solid var(--line);border-radius:13px;padding:17px;display:grid;gap:4px}
.course-overview span{font-size:11px;color:var(--muted)}
.info-box,.test-box{background:#fff;border:1px solid var(--line);border-radius:17px;padding:24px}
.info-box{display:flex;gap:16px;align-items:center}
.info-box img{width:44px;height:44px}
.info-box>div{display:grid;gap:4px}
.info-box span{color:var(--muted);font-size:13px}
.test-box{margin-top:22px;position:relative}
.test-box h2{font-size:30px;margin:10px 0 7px}
.test-box p{color:var(--muted)}
.coming-soon{position:absolute;right:20px;top:20px;background:var(--brand-soft);color:var(--brand);padding:7px 9px;border-radius:999px;font-size:11px;font-weight:900}
.modal{
  display:none;position:fixed;inset:0;z-index:100;background:rgba(4,16,12,.86);
  padding:22px;align-items:center;justify-content:center
}
.modal.show{display:flex}
.modal-card{width:min(1000px,100%);background:#0d1713;border-radius:18px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.35)}
.modal-head,.modal-footer{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;color:#fff}
.modal-head button{border:0;background:transparent;color:#fff;font-size:30px;cursor:pointer}
.video-wrap{aspect-ratio:16/9;background:#000}
.video-wrap iframe{width:100%;height:100%;border:0}
.modal-footer{justify-content:flex-end;background:#111f19}
.admin-title{padding-bottom:18px}
.admin-grid,.admin-bottom-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.admin-bottom-grid{padding-bottom:80px}
.panel-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px}
.panel-head h2{margin:0}
.badge{background:var(--brand-soft);color:var(--brand);font-size:11px;font-weight:900;padding:6px 9px;border-radius:999px}
.admin-list{display:grid}
.admin-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  border-top:1px solid var(--line);padding:13px 0
}
.admin-row:first-child{border-top:0}
.admin-row>div:first-child{display:grid;gap:4px}
.admin-row span{color:var(--muted);font-size:12px}
.row-actions{display:flex;gap:6px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.scroll-list{max-height:460px;overflow:auto}
.empty{border:1px dashed var(--line);border-radius:14px;padding:30px;color:var(--muted)}
.empty.wide{grid-column:1/-1}
.empty.compact{padding:18px}
.flash-wrap{position:fixed;right:18px;top:84px;z-index:60}
.flash{background:#10231d;color:#fff;border-radius:11px;padding:13px 15px;max-width:360px;box-shadow:var(--shadow)}
.footer{margin-top:40px;border-top:1px solid var(--line);background:#fff}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:60px;padding:50px 0}
.footer-grid>div{display:grid;align-content:start;gap:9px}
.footer-grid p,.footer-grid a,.footer-grid span{color:var(--muted);font-size:13px;line-height:1.55}
.footer-brand{margin-bottom:8px}
.footer-bottom{border-top:1px solid var(--line);padding:18px 0;color:var(--muted);font-size:12px}
.error-page{padding:120px 0;text-align:center}
.error-page h1{font-size:60px;letter-spacing:-.05em;margin:12px 0}
.error-page p{color:var(--muted)}
@media(max-width:920px){
  .nav a:not(.nav-btn):nth-child(-n+2){display:none}
  .hero-grid,.split-feature,.auth-grid,.course-layout,.admin-grid,.admin-bottom-grid,.profile-layout{grid-template-columns:1fr}
  .hero-art{max-width:650px;margin:auto}
  .cards{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .toc{position:static}
  .lesson-list{max-height:60vh}
  .course-main h1{font-size:48px}
}
@media(max-width:650px){
  .container{width:min(100% - 24px,1180px)}
  .header-inner{min-height:66px}
  .brand{font-size:17px}.brand-mark{width:30px;height:30px}
  .nav{gap:8px}
  .hero{padding:58px 0 50px}
  .hero-copy h1,.page-hero h1,.welcome h1,.auth-copy h1{font-size:42px}
  .hero-copy p,.page-hero p,.auth-copy p{font-size:16px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:18px;padding:22px 0}
  .stats-grid>div{border:0;padding:0}
  .cards,.about-grid,.dashboard-stats,.course-overview{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .section{padding:58px 0}
  .section-head{align-items:start;flex-direction:column}
  .section-head h2,.content-block h2,.cta h2{font-size:34px}
  .split-feature h2{font-size:38px}
  .cta{padding:28px;flex-direction:column;align-items:flex-start}
  .dashboard-top{align-items:flex-start;flex-direction:column}
  .progress-ring-card{width:100%}
  .course-layout{gap:34px}
  .admin-row{align-items:flex-start;flex-direction:column}
  .row-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .modal{padding:10px}
}

.hero-art{width:100%;min-width:0}


/* Professional Admin Dashboard */
.admin-shell{min-height:calc(100vh - 74px);display:grid;grid-template-columns:250px 1fr}
.admin-sidebar{
  position:sticky;top:74px;height:calc(100vh - 74px);background:#0e241d;color:#fff;
  display:flex;flex-direction:column;padding:22px 16px;border-right:1px solid #183c31
}
.admin-sidebar-head{display:flex;align-items:center;gap:11px;padding:6px 8px 24px}
.admin-sidebar-head>div{display:grid;gap:2px}
.admin-sidebar-head strong{font-size:14px}
.admin-sidebar-head span:not(.brand-mark){font-size:11px;color:#8fb0a4}
.admin-nav{display:grid;gap:5px}
.admin-nav a{
  padding:11px 12px;border-radius:10px;color:#abc1b9;font-size:13px;font-weight:800;
  display:flex;gap:10px;align-items:center
}
.admin-nav a:hover,.admin-nav a.active{background:#17382e;color:#fff}
.admin-nav a>span{width:18px;text-align:center}
.admin-sidebar-foot{margin-top:auto;border-top:1px solid #22483c;padding-top:14px;display:grid;gap:6px}
.admin-sidebar-foot a{color:#94afa5;padding:8px 10px;font-size:12px;font-weight:750}
.admin-content{padding:34px;min-width:0}
.admin-page-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:26px}
.admin-page-head h1{font-size:42px;letter-spacing:-.045em;margin:8px 0 6px}
.admin-page-head p{color:var(--muted);margin:0}
.admin-back{display:block;color:var(--muted);font-size:12px;font-weight:800;margin-bottom:18px}
.admin-kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-bottom:18px}
.admin-kpis.compact{grid-template-columns:repeat(3,1fr)}
.admin-kpis article{
  background:#fff;border:1px solid var(--line);border-radius:15px;padding:19px;display:grid;gap:6px
}
.admin-kpis article>span{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:850}
.admin-kpis strong{font-size:30px;letter-spacing:-.04em}
.admin-kpis small{font-size:11px;color:var(--muted)}
.admin-two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px}
.admin-card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:22px;margin-bottom:18px}
.admin-card h2{font-size:24px;letter-spacing:-.035em;margin:7px 0 18px}
.admin-card-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:12px}
.admin-card-head h2{margin:7px 0 0}
.admin-card-head>a{font-size:12px;color:var(--brand);font-weight:850}
.admin-table-list{display:grid}
.admin-list-row{
  min-height:62px;border-top:1px solid var(--line);display:flex;align-items:center;gap:11px;padding:10px 0
}
.admin-list-row:first-child{border-top:0}
.grow{flex:1;min-width:0;display:grid;gap:3px}
.grow strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.grow span{font-size:11px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.student-mini-avatar,.course-mini-icon{
  flex:0 0 34px;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-weight:900
}
.admin-table{overflow-x:auto}
.admin-table-row{
  min-width:720px;display:grid;grid-template-columns:1.2fr 1.4fr .8fr .8fr;gap:16px;
  align-items:center;border-top:1px solid var(--line);padding:13px 4px;font-size:12px
}
.admin-table-row:first-child{border-top:0}
.admin-table-header{
  color:var(--muted);font-size:10px;text-transform:uppercase;letter-spacing:.08em;font-weight:900
}
.student-grid{grid-template-columns:1.1fr 1.3fr .75fr .7fr 1fr}
.progress-grid{grid-template-columns:1.1fr 1.3fr .6fr 1.2fr}
.progress-cell{display:grid;grid-template-columns:1fr 38px;gap:8px;align-items:center}
.progress-cell small{color:var(--muted);text-align:right}
.admin-substats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:18px}
.admin-substats a{background:#fff;border:1px solid var(--line);border-radius:13px;padding:14px 16px;display:grid;gap:3px}
.admin-substats strong{font-size:22px}.admin-substats span{font-size:11px;color:var(--muted)}
.admin-filterbar{display:flex;gap:10px;margin-bottom:10px}
.admin-filterbar input{max-width:420px}
.admin-course-create{align-items:start}
.admin-help-card ol{padding-left:22px;display:grid;gap:10px;color:var(--muted);line-height:1.5}
.admin-help-card p,.muted{color:var(--muted)}
.admin-course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}
.admin-course-card{border:1px solid var(--line);border-radius:14px;padding:17px;background:#fafcfb}
.admin-course-card-top{display:flex;justify-content:space-between;align-items:center}
.level.static{position:static;display:inline-flex}
.admin-course-card h3{font-size:18px;margin:24px 0 7px;letter-spacing:-.02em}
.admin-course-card p{font-size:12px;color:var(--muted);line-height:1.5;min-height:54px}
.admin-course-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:11px;margin:16px 0}
.playlist-link{
  font-size:12px;color:var(--brand);background:var(--brand-soft);padding:12px;border-radius:10px;
  overflow-wrap:anywhere;margin:12px 0
}
.admin-card hr{border:0;border-top:1px solid var(--line);margin:20px 0}
.lesson-admin-list{display:grid}
.lesson-admin-row{display:flex;gap:12px;align-items:center;border-top:1px solid var(--line);padding:12px 0}
.lesson-admin-row:first-child{border-top:0}
.lesson-index{width:30px;color:var(--brand);font-size:11px;font-weight:900}
.settings-list{display:grid}
.settings-list>div{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:12px 0;font-size:12px}
.settings-list>div:first-child{border-top:0}
.settings-list span{color:var(--muted)}
.admin-checklist{padding-left:18px;display:grid;gap:10px;color:var(--muted);line-height:1.5}
.future-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.future-grid span{background:var(--surface-2);padding:12px;border-radius:10px;font-size:12px;font-weight:750}
@media(max-width:1100px){
  .admin-shell{grid-template-columns:210px 1fr}
  .admin-kpis{grid-template-columns:repeat(2,1fr)}
  .admin-course-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:820px){
  .admin-shell{grid-template-columns:1fr}
  .admin-sidebar{position:static;height:auto;padding:12px}
  .admin-sidebar-head{padding:4px 6px 12px}
  .admin-nav{display:flex;overflow:auto}
  .admin-nav a{white-space:nowrap}
  .admin-sidebar-foot{display:none}
  .admin-content{padding:20px 12px}
  .admin-two-col{grid-template-columns:1fr}
  .admin-page-head{align-items:flex-start;flex-direction:column}
  .admin-course-grid{grid-template-columns:1fr}
  .admin-substats{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:520px){
  .admin-kpis,.admin-kpis.compact{grid-template-columns:1fr}
  .future-grid{grid-template-columns:1fr}
  .admin-filterbar{flex-direction:column}
}

.admin-course-cover{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:9px;margin-bottom:14px}

.admin-sidebar,.admin-card{min-width:0}.admin-nav{max-width:100%}.admin-two-col{grid-template-columns:repeat(2,minmax(0,1fr))}@media(max-width:820px){.admin-shell,.admin-two-col{grid-template-columns:minmax(0,1fr)}}


/* Final marketing + auth architecture */
.marketing-hero .hero-copy h1{max-width:760px}
.trust-bar{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust-inner{min-height:70px;display:flex;align-items:center;gap:18px}
.trust-inner strong{color:var(--brand)}
.trust-inner span{color:var(--muted);font-size:13px}
.learning-topics{background:#eaf2ef}
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.topic-grid>div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;display:flex;gap:12px;align-items:center}
.topic-grid span{color:var(--brand);font-size:11px;font-weight:900}
.steps.three{grid-template-columns:repeat(3,1fr)}
.faq-section{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px}
.faq-grid h2{font-size:42px;letter-spacing:-.045em;line-height:1.05;margin:12px 0}
.faq-list{display:grid;gap:10px}
.faq-list details{border:1px solid var(--line);border-radius:13px;padding:16px 18px;background:#fafcfb}
.faq-list summary{cursor:pointer;font-weight:850}
.faq-list p{color:var(--muted);line-height:1.6;font-size:13px}
.course-card-link{color:var(--brand);font-weight:850;font-size:13px}

.simple-auth-page,.admin-auth-page{
  min-height:calc(100vh - 74px);
  display:grid;place-items:center;padding:50px 16px;
  background:linear-gradient(135deg,#f7faf8 0%,#edf4f1 100%);
}
.simple-auth-card,.admin-auth-card{
  width:min(460px,100%);background:#fff;border:1px solid var(--line);
  border-radius:22px;padding:32px;box-shadow:0 28px 70px rgba(16,52,40,.08)
}
.simple-auth-card h1,.admin-auth-card h1{
  font-size:34px;letter-spacing:-.045em;margin:9px 0 8px
}
.simple-auth-card>p,.admin-auth-card>p{color:var(--muted);font-size:13px;line-height:1.6;margin-bottom:24px}
.auth-switch{
  border-top:1px solid var(--line);margin-top:22px;padding-top:18px;
  text-align:center;font-size:12px;color:var(--muted)
}
.auth-switch a{color:var(--brand);font-weight:900;margin-left:4px}
.success-card{text-align:center}
.success-icon{
  width:60px;height:60px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-size:26px;font-weight:900;margin:0 auto 18px
}
.admin-auth-page{background:#0d231c}
.admin-auth-card{box-shadow:0 30px 80px rgba(0,0,0,.22)}
.admin-auth-mark{
  width:48px;height:48px;border-radius:14px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-size:20px;font-weight:950;margin-bottom:22px
}
.admin-back-site{display:block;text-align:center;margin-top:18px;color:var(--muted);font-size:12px}

.public-course-hero{
  padding:74px 0 50px;display:grid;grid-template-columns:1fr 420px;gap:50px;align-items:center
}
.public-course-hero h1{font-size:58px;letter-spacing:-.055em;line-height:1;margin:12px 0 18px}
.public-course-hero p{font-size:18px;line-height:1.7;color:var(--muted)}
.public-course-meta{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}
.public-course-meta span{background:var(--brand-soft);color:var(--brand);padding:8px 10px;border-radius:999px;font-size:11px;font-weight:850}
.preview-video-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}
.preview-video-card img{width:100%;aspect-ratio:16/9;object-fit:cover;filter:brightness(.75)}
.preview-video-card>div{padding:18px;display:grid;gap:5px}
.preview-video-card span{color:var(--muted);font-size:12px}
.public-syllabus{padding-bottom:90px}
.public-lesson-list{display:grid;border:1px solid var(--line);background:#fff;border-radius:16px;overflow:hidden}
.public-lesson-list>div{
  display:grid;grid-template-columns:46px 1fr auto;align-items:center;gap:12px;padding:15px 18px;border-top:1px solid var(--line)
}
.public-lesson-list>div:first-child{border-top:0}
.public-lesson-list>div>span:first-child{color:var(--brand);font-size:11px;font-weight:900}
.locked{font-size:10px;color:var(--muted);background:#f2f5f4;padding:6px 8px;border-radius:999px}
.locked-cta{margin-top:18px;background:var(--brand-2);color:#fff;border-radius:18px;padding:28px}
.locked-cta h3{font-size:25px;margin:0 0 6px}
.locked-cta p{color:#bdd2ca}

@media(max-width:900px){
  .faq-grid,.public-course-hero{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:620px){
  .topic-grid,.steps.three{grid-template-columns:1fr}
  .trust-inner{align-items:flex-start;flex-direction:column;justify-content:center;padding:16px 0;gap:4px}
  .faq-grid{gap:28px}
  .faq-grid h2{font-size:34px}
  .public-course-hero h1{font-size:42px}
  .public-lesson-list>div{grid-template-columns:36px 1fr}
  .public-lesson-list .locked{grid-column:2}
}

.login-brand-mini{display:flex;align-items:center;gap:10px;font-weight:850;margin-bottom:22px}.auth-main-btn{margin-top:20px}

.logout-button{font:inherit;color:inherit;background:transparent;border:0;cursor:pointer;padding:8px}.nav form{margin:0}