:root{--ink:#172542;--muted:#67738b;--purple:#6345df;--teal:#12796e;--line:#e4e8f0;--paper:#f6f7fb}body{font-family:system-ui,-apple-system,'Segoe UI',sans-serif;color:var(--ink);background:var(--paper)}a{color:var(--purple);text-decoration:none}a:hover{color:#4326b3}.navbar{background:#fff;border-bottom:1px solid var(--line)}.brand{font-size:1.45rem;font-weight:850;letter-spacing:-.06em;color:var(--ink)}.brand-mark{display:inline-flex;width:34px;height:34px;background:var(--purple);border-radius:11px;color:#fff;align-items:center;justify-content:center;margin-right:7px;font-size:22px;transform:rotate(-6deg)}.nav-link{font-weight:600;color:#495573}.btn-primary{--bs-btn-bg:var(--purple);--bs-btn-border-color:var(--purple);--bs-btn-hover-bg:#5034c8;--bs-btn-hover-border-color:#5034c8;--bs-btn-active-bg:#4326b3;--bs-btn-active-border-color:#4326b3}.btn{border-radius:9px;font-weight:650;padding:.6rem 1rem}.btn-sm{padding:.32rem .65rem;font-size:.8rem}.btn-outline-primary{--bs-btn-color:var(--purple);--bs-btn-border-color:var(--purple);--bs-btn-hover-bg:var(--purple);--bs-btn-hover-border-color:var(--purple)}.eyebrow{font-size:.76rem;letter-spacing:.16em;text-transform:uppercase;font-weight:800;color:var(--teal)}.hero{background:#e9e6fc;position:relative;overflow:hidden;border-bottom:1px solid #dfdcf5}.hero h1{font-size:clamp(2.5rem,5vw,4.2rem);line-height:1.05;font-weight:850;letter-spacing:-.055em;max-width:640px}.hero h1 em{font-style:normal;color:var(--purple)}.hero p{max-width:520px;font-size:1.1rem;color:#586581}.hero-art{position:relative;max-width:420px;height:335px;margin:auto}.hero-circle{position:absolute;width:300px;height:300px;right:25px;top:12px;border-radius:50%;background:#d6cdfc}.hero-board{position:absolute;top:38px;left:20px;right:32px;background:#172542;border-radius:20px;color:white;padding:28px;box-shadow:0 22px 45px #473d7440;transform:rotate(-4deg)}.hero-board .code{font-family:monospace;font-size:1.04rem;line-height:1.9;color:#c3b5ff}.hero-chip{position:absolute;background:white;padding:14px 20px;border:1px solid #edeaf7;border-radius:14px;box-shadow:0 10px 25px #473d7420;font-weight:700}.hero-chip.one{bottom:15px;left:0;transform:rotate(-3deg)}.hero-chip.two{right:0;top:2px;transform:rotate(4deg)}.section-title{font-weight:800;letter-spacing:-.035em}.card{border:1px solid var(--line);border-radius:16px;box-shadow:0 3px 12px #17254204}.course-card{overflow:hidden;height:100%;transition:transform .2s,box-shadow .2s}.course-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px #17254212}.course-art{height:160px;background:#252c50;color:white;position:relative;padding:24px;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden}.course-art:after{content:'';position:absolute;height:180px;width:180px;border:35px solid #ffffff0d;border-radius:50%;right:-40px;top:-35px}.course-art[data-category='web-development']{background:linear-gradient(130deg,#1d294f,#5051a3)}.course-art[data-category='python-programming']{background:linear-gradient(130deg,#07534f,#138a7c)}.course-art[data-category='business']{background:linear-gradient(130deg,#613d87,#aa6691)}.course-art[data-category='design']{background:linear-gradient(130deg,#9b503c,#ce8c62)}.course-art[data-category='data-science']{background:linear-gradient(130deg,#203b65,#407fa3)}.art-label{font-size:.64rem;letter-spacing:.18em;font-weight:700;opacity:.8}.art-symbol{font-size:2.6rem;font-weight:850;letter-spacing:-.07em;z-index:1}.course-card h3{font-size:1.06rem;font-weight:750;line-height:1.4}.course-card .card-body{padding:20px}.muted,.text-muted{color:var(--muted)!important}.rating{color:#a26400;font-weight:750;font-size:.85rem}.pill{display:inline-flex;padding:5px 11px;border-radius:100px;background:#eef0ff;color:#514090;font-size:.76rem;font-weight:700}.stat{font-size:1.85rem;font-weight:800;letter-spacing:-.04em}.stat-card{padding:24px}.form-control,.form-select{border-color:#dce1eb;border-radius:9px;padding:.65rem .8rem}.form-control:focus,.form-select:focus{border-color:#9d88f2;box-shadow:0 0 0 .2rem #6345df15}.form-label{font-weight:650;font-size:.9rem}.errorlist{list-style:none;padding:0;font-size:.85rem;color:#b42318}.page-head{background:#fff;border-bottom:1px solid var(--line);padding:32px 0}.page-head h1{font-weight:800;letter-spacing:-.045em}.course-hero{background:#192641;color:white;padding:40px 0}.course-hero .muted{color:#b7c1d4!important}.course-hero h1{font-size:clamp(1.9rem,3.6vw,2.9rem);font-weight:800;letter-spacing:-.04em}.course-hero .pill{background:#334364;color:#d7d1ff}.purchase-card{position:sticky;top:100px}.lesson-item{padding:14px 18px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:12px}.lesson-item:last-child{border:0}.lesson-item.active{background:#f0ecff;color:var(--purple)}.lesson-content{white-space:pre-wrap;line-height:1.9;font-size:1.02rem}.progress{height:8px;background:#eae7f4}.progress-bar{background:var(--purple)}.empty-state{padding:50px 25px;text-align:center;border:1px dashed #ccd3e2;border-radius:16px;background:white}.table{--bs-table-color:var(--ink);font-size:.9rem}.table>:not(caption)>*>*{padding:15px}.badge{padding:.5em .7em}.auth-card{max-width:490px;margin:40px auto}.form-wrap{max-width:860px;margin:auto}.footer{background:#172542;color:#c0cadb;margin-top:60px;padding:32px 0;font-size:.9rem}.footer a{color:#ded6ff}.certificate{background:white;max-width:1000px;margin:auto;padding:60px;border:10px double #bf9b53;text-align:center}.certificate h1{font-size:2.7rem;letter-spacing:.08em}.certificate .name{font-size:2.4rem;font-weight:750;color:var(--purple);margin:26px 0}.certificate .course-name{font-size:1.55rem;font-weight:700;margin:20px 0}.certificate .cert-code{font-size:.8rem;overflow-wrap:anywhere}.account-form input{display:block;width:100%;padding:.6rem;border:1px solid #dce1eb;border-radius:8px}.account-form label{font-weight:600;margin-bottom:6px}.account-form ul{font-size:.85rem;color:var(--muted);padding-left:20px}.lesson-sidebar{position:sticky;top:90px;max-height:calc(100vh - 110px);overflow:auto}.two-line{min-height:48px}.course-card .small{font-size:.8rem}.feature-icon{width:42px;height:42px;border-radius:12px;background:#ede8ff;color:var(--purple);display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;margin-bottom:14px}.small-code{font-family:monospace;overflow-wrap:anywhere}.helptext{font-size:.85rem;color:var(--muted)}@media(max-width:991px){.lesson-sidebar{position:static;max-height:none}.purchase-card{position:static}.hero-art{height:310px;margin-top:20px}.certificate{padding:25px}.certificate h1{font-size:1.7rem}.navbar .btn{margin:5px 0}}@media print{.no-print,.navbar,.footer{display:none!important}body{background:white}.certificate{border:6px double #bf9b53;padding:30px;box-shadow:none;margin:0}.certificate .name{font-size:2rem}@page{size:A4 landscape;margin:12mm}}

/* Custom administrator workspace */
.admin-layout{max-width:1680px;padding-left:28px;padding-right:28px}.admin-main{min-width:0}.admin-sidebar{background:#182541;color:white;border-radius:18px;padding:18px 12px;position:sticky;top:100px}.admin-sidebar-brand{padding:12px 14px 24px}.admin-label{font-size:.66rem;font-weight:800;letter-spacing:.15em;color:#c2b6ff}.admin-sidebar nav a,.admin-exit{display:flex;align-items:center;gap:12px;color:#c3cede;padding:12px 14px;margin:3px 0;border-radius:10px;font-weight:600;font-size:.84rem;white-space:nowrap}.admin-sidebar nav a span,.admin-exit span{font-size:1.1rem;min-width:18px;text-align:center;color:#a899f4}.admin-sidebar nav a:hover,.admin-sidebar nav a.active{background:#6345df;color:white}.admin-sidebar nav a.active span{color:white}.admin-sidebar hr{border-color:#43506e;margin:16px 10px}.admin-exit{background:transparent;border:0;width:100%}.admin-exit:hover{background:#263652}.admin-page-header{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin:4px 0 28px}.admin-page-header h1{font-size:2rem;font-weight:800;letter-spacing:-.04em;margin:8px 0}.admin-search{flex:1;min-width:180px}.admin-filter{width:auto;min-width:180px}.admin-edit{max-width:920px}.admin-queue{overflow:hidden}.admin-login-shell{max-width:1050px;margin:auto;background:white;border:1px solid var(--line);border-radius:24px;overflow:hidden;display:grid;grid-template-columns:1.1fr 1fr;box-shadow:0 22px 60px #1725420c}.admin-login-intro{background:linear-gradient(140deg,#192641,#343068);color:white;padding:55px 45px;position:relative;overflow:hidden}.admin-login-intro:after{content:'';position:absolute;right:-120px;bottom:-145px;width:390px;height:390px;border-radius:50%;border:60px solid #ffffff06;pointer-events:none}.admin-login-intro h1{font-size:2.5rem;font-weight:800;letter-spacing:-.045em;line-height:1.15;margin:28px 0 20px}.admin-login-intro h1 span{color:#c4b6ff}.admin-login-intro p{color:#c3cade;line-height:1.7;max-width:330px}.admin-login-features{margin-top:32px;display:grid;gap:24px}.admin-login-features>div{display:grid;grid-template-columns:38px 1fr;column-gap:12px}.admin-login-features span{grid-row:span 2;background:#ffffff12;color:#d7ceff;width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-size:22px}.admin-login-features strong{font-size:.9rem}.admin-login-features small{color:#b3bdd3;font-size:.77rem;margin-top:3px}.admin-login-form{padding:60px 42px;align-self:center}.admin-login-note{padding:16px;background:#f5f3fc;border-radius:12px;font-size:.8rem}.admin-login-form h2{font-size:2.2rem}.admin-sidebar form{margin:0}.admin-main .stat-card{padding:18px}.admin-main .stat{font-size:1.7rem;overflow-wrap:anywhere}@media(min-width:768px) and (max-width:1199px){.admin-sidebar nav a,.admin-exit{font-size:.77rem;padding:10px 8px;gap:7px}.admin-sidebar-brand{padding:10px 8px 20px}.admin-layout{padding-left:18px;padding-right:18px}}@media(max-width:767px){.admin-layout{padding-left:16px;padding-right:16px}.admin-sidebar{position:static}.admin-login-shell{grid-template-columns:1fr}.admin-login-intro{padding:28px}.admin-login-intro h1{font-size:2rem;margin:16px 0}.admin-login-features{display:none}.admin-login-form{padding:30px 25px}.admin-page-header h1{font-size:1.7rem}.admin-filter{width:100%}.admin-login-intro p{margin-bottom:0}}