:root{--navy:#142b40;--blue:#1764ce;--blue2:#0c4fae;--ink:#17283c;--muted:#6d7988;--line:#e4e9ef;--bg:#f7f9fc;--gold:#f6b84a}*{box-sizing:border-box}body{margin:0;font:16px/1.65 system-ui,-apple-system,Segoe UI,Arial,sans-serif;color:var(--ink);background:white}a{color:inherit;text-decoration:none}a:hover{color:var(--blue)}h1,h2,h3,h4{line-height:1.22;letter-spacing:-.035em}h1{font-size:clamp(2.4rem,5vw,4.2rem);margin:.35em 0}h2{font-size:2rem}h3{font-size:1.12rem}p{margin:.7em 0 1.25em}.container{width:min(1160px,calc(100% - 40px));margin:auto}.header{background:white;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.nav{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}.logo{display:inline-flex;align-items:center;font-size:1.55rem;font-weight:850;letter-spacing:-.05em;color:var(--navy)}.logo-mark{display:inline-grid;place-items:center;background:var(--blue);color:white;border-radius:11px;width:36px;height:36px;margin-right:9px}.navlinks,.nav-actions{display:flex;align-items:center;gap:23px}.navlinks a{font-weight:650;font-size:.92rem}.nav-actions{gap:12px}.nav-name,.cart-link{font-size:.88rem;font-weight:650}.btn{border:1px solid transparent;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;border-radius:9px;font:700 .94rem system-ui;transition:transform .18s,background 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0}.eyebrow{color:var(--blue);font-size:.77rem;font-weight:850;letter-spacing:.12em}.muted{color:var(--muted)}.small{font-size:.86rem}.text-link{color:var(--blue);font-weight:800}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:25px}.course-card{border:1px solid var(--line);border-radius:15px;overflow:hidden;background:white;box-shadow:0 7px 25px #18335408;transition:transform .2s,box-shadow .2s}.course-card:hover{transform:translateY(-4px);box-shadow:0 18px 35px #18335415}.cover{height:195px;background:linear-gradient(135deg,#c5e0ff,#4184d9 65%,#16457f);background-size:cover;background-position:center;position:relative;display:grid;place-items:center}.cover-symbol{font-size:5rem;color:#ffffffb8}.cover-tag{position:absolute;top:15px;left:15px;background:white;padding:4px 12px;border-radius:30px;font-size:.75rem;font-weight:800}.course-body{padding:20px}.course-body h3{min-height:2.5em;margin:7px 0}.course-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:15px;margin-top:20px}.course-bottom strong{font-size:1.15rem}.feature-section{background:var(--bg);padding:65px 0}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.feature{padding:30px;background:white;border-radius:16px;border:1px solid var(--line)}.feature>span{font-size:2rem;color:var(--blue)}.feature p{color:var(--muted)}.footer{background:#10283d;color:#d5e0ec;padding:60px 0 20px}.footer .logo{color:white}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:45px}.footer-grid a:not(.logo){display:block;margin:10px 0}.footer-bottom{border-top:1px solid #ffffff20;margin-top:40px;padding-top:20px;font-size:.8rem}.filters{display:flex;gap:12px;margin:30px 0 40px}.filters input{flex:1}.filters select{min-width:170px}input,select,textarea{width:100%;border:1px solid #d5deea;border-radius:9px;padding:12px 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span{font-size:.85rem;color:var(--muted)}.progress{height:7px;background:#e7edf5;border-radius:30px;overflow:hidden;margin:12px 0 20px}.progress span{display:block;background:var(--blue);height:100%}.empty{padding:35px;background:var(--bg);border-radius:14px}.narrow{max-width:850px}.cart-item{padding:20px 0}.learning-grid{display:grid;grid-template-columns:300px 1fr;gap:25px}.lesson-sidebar{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:20px;align-self:start}.sidebar-lesson{display:block;padding:12px;border-radius:8px;font-size:.9rem}.sidebar-lesson.active{background:#dceafe;color:var(--blue);font-weight:750}.lesson-content{padding:20px;border:1px solid var(--line);border-radius:14px;min-height:350px}.lesson-text{white-space:normal;margin:25px 0}.video-note{background:#edf5ff;padding:20px;border-radius:10px}.video-note a{color:var(--blue)}.success-text{color:#19734d;font-weight:800}.admin-grid{display:grid;grid-template-columns:1fr 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0}.nav-actions{gap:8px;flex-wrap:wrap}.nav-name{display:none}.hero-grid{padding:48px 0}.hero-visual{display:none}.hero-trust{gap:9px}.course-grid,.feature-grid,.footer-grid{grid-template-columns:1fr}.section{padding:45px 0}.section-top{align-items:start;flex-direction:column}.filters{flex-wrap:wrap}.filters input,.filters select{min-width:100%}.auth-card{padding:25px}.dashboard-head{display:block}.inline-form{flex-wrap:wrap}.cart-item{align-items:start}.course-banner h1{font-size:2.3rem}}@media print{.header,.footer,.no-print,.filters{display:none}.certificate{margin:0;min-height:80vh}}