:root{--ink:#222a32;--navy:#172b3a;--navy2:#0e1e29;--gold:#b9a168;--gold2:#d9c99e;--paper:#f6f4ef;--white:#fff;--muted:#747b80;--line:#e6e3dc;--danger:#9b1c1c;--success:#35714b}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--paper);color:var(--ink)}button,input,select{font:inherit}.shell{min-height:100vh;padding:24px}.shell.login-shell{display:grid;place-items:center;background:radial-gradient(circle at 16% 12%,rgba(217,201,158,.24),transparent 28%),linear-gradient(145deg,var(--navy2),#294252 62%,#917e51)}.shell.wide{padding:0;background:#f5f5f3}.card{width:min(100%,520px);background:#fffffff7;border:1px solid rgba(255,255,255,.42);border-radius:28px;padding:30px;box-shadow:0 24px 70px #09151d3d}.wide .card{width:100%;max-width:none;min-height:100vh;border:0;border-radius:0;padding:0;background:#f7f7f5;box-shadow:none}.brand{display:flex;gap:16px;align-items:center}.brand-copy{min-width:0}.brand h1,.topbar h1{margin:0;letter-spacing:-.035em}.brand h1{font-family:Georgia,serif;font-size:clamp(1.65rem,5vw,2.25rem);font-weight:600;line-height:1.03}.brand p,.muted{margin:.45rem 0 0;color:var(--muted)}.logo{width:60px;height:60px;flex:0 0 60px;border-radius:18px;background:linear-gradient(145deg,var(--navy),#34536a);color:#fff;display:grid;place-items:center;font-family:Georgia,serif;font-size:1.2rem;font-weight:700;box-shadow:inset 0 0 0 1px #ffffff2e}.login-intro{margin:24px -30px 22px;padding:26px 30px;background:linear-gradient(120deg,#b9a1682e,#172b3a0a);border-block:1px solid rgba(185,161,104,.25)}.login-intro strong{display:block;font-family:Georgia,serif;font-size:1.3rem;color:var(--navy);margin-bottom:6px}.login-intro span{color:#667078;line-height:1.5}.demo-access{margin:0 0 20px;padding:13px 15px;border-radius:15px;background:#f6f2e7;border:1px solid #dfd2af;color:#5d5543;font-size:.88rem;line-height:1.55}.demo-access code{font-weight:800;color:var(--navy)}form{display:grid;gap:11px}label{font-weight:750;font-size:.88rem;color:#3c454c}input,select{width:100%;min-height:48px;padding:12px 14px;border:1px solid #d7d9da;border-radius:14px;background:#fff;color:var(--ink);outline:none;transition:.2s}input:focus,select:focus{border-color:var(--gold);box-shadow:0 0 0 4px #b9a16826}button{border:0;border-radius:14px;padding:13px 17px;background:var(--navy);color:#fff;font-weight:800;cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s}button:hover{background:#244457;box-shadow:0 8px 20px #172b3a29}button:active{transform:translateY(1px)}.login-button{margin-top:5px;border-radius:999px;background:linear-gradient(90deg,#a78e54,var(--gold));font-size:1.02rem}.secondary{background:#edf0f1;color:var(--navy)}.msg{min-height:24px;margin:10px 0 0}.error{color:var(--danger)}.ok{color:var(--success)}.app-header{padding:24px clamp(20px,5vw,72px);background:linear-gradient(120deg,var(--navy2),var(--navy));color:#fff}.topbar{display:flex;gap:18px;align-items:center;justify-content:space-between;max-width:1180px;margin:auto}.topbar .muted{color:#ffffffad}.topbar .secondary{background:#ffffff1f;color:#fff}.admin-body,.student-body{max-width:1180px;margin:auto;padding:24px clamp(18px,4vw,46px) 60px}.tabs{display:flex;gap:9px;overflow:auto;margin:0 0 24px;padding-bottom:4px}.tab{background:#ebece9;color:#4d555a;white-space:nowrap;border-radius:999px}.tab.active{background:var(--navy);color:#fff}.pane{display:none;background:#fff;border:1px solid var(--line);border-radius:22px;padding:clamp(18px,3vw,30px);box-shadow:0 12px 30px #1d282d0d}.pane.active{display:block}.pane h2{margin:0 0 18px;font-family:Georgia,serif;font-size:1.55rem;color:var(--navy)}.pane h2:not(:first-child){margin-top:30px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.grid .full{grid-column:1/-1}.item{border:1px solid var(--line);border-radius:16px;padding:15px;margin:10px 0;background:#fbfbfa;line-height:1.5}.badge{display:inline-flex;align-items:center;padding:4px 9px;border-radius:999px;background:#edf0f1;color:#4f5b62;font-size:.76rem;font-weight:750}.student-hero{position:relative;overflow:hidden;padding:32px clamp(20px,5vw,72px) 38px;background:linear-gradient(118deg,#0a1923f5,#1b3645eb),radial-gradient(circle at 80% 20%,#b9a168,transparent 30%);color:#fff}.student-hero:after{content:"";position:absolute;right:-90px;bottom:-150px;width:320px;height:320px;border:1px solid rgba(255,255,255,.12);border-radius:50%;box-shadow:0 0 0 38px #ffffff09,0 0 0 76px #ffffff06}.student-hero .topbar{position:relative;z-index:1}.student-hero h1{font-family:Georgia,serif;font-size:clamp(1.8rem,5vw,3rem);font-weight:500}.student-kicker{margin:0 0 7px;color:var(--gold2);font-size:.8rem;text-transform:uppercase;letter-spacing:.15em;font-weight:800}.student-summary{position:relative;z-index:1;max-width:1180px;margin:26px auto 0}.student-summary h2{max-width:720px;margin:0;font-family:Georgia,serif;font-weight:500;font-size:clamp(1.35rem,4vw,2.05rem);line-height:1.2}.student-summary p{margin:10px 0 0;color:#ffffffb8}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:14px;margin:0 0 18px}.section-heading h2{margin:0;font-family:Georgia,serif;color:var(--navy);font-size:1.7rem}.section-heading p{margin:4px 0 0;color:var(--muted)}.course-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:20px}.course{overflow:hidden;border:1px solid var(--line);border-radius:23px;background:#fff;box-shadow:0 12px 30px #1f292e12}.course-cover{min-height:190px;padding:25px;display:flex;flex-direction:column;justify-content:space-between;color:#fff;background:linear-gradient(145deg,#0b1d27eb,#384a42c7),radial-gradient(circle at 85% 20%,#c7b47d,transparent 28%)}.course:nth-child(2n) .course-cover{background:linear-gradient(145deg,#17202bf0,#483e30cc),radial-gradient(circle at 20% 20%,#c7b47d,transparent 28%)}.course-mark{width:45px;height:45px;border:1px solid rgba(255,255,255,.48);border-radius:50%;display:grid;place-items:center;font-family:Georgia,serif;font-size:1.25rem}.course-cover h2{margin:24px 0 5px;font-family:Georgia,serif;font-weight:500;font-size:1.7rem;line-height:1.05}.course-cover p{margin:0;color:#ffffffba;font-size:.9rem}.course-content{padding:20px}.course-status{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:12px;color:#626b70;font-size:.88rem}.progress-track{height:7px;border-radius:999px;background:#e9e9e5;overflow:hidden;margin-bottom:18px}.progress-fill{height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--gold),#d2c18f)}.lesson-list{position:relative;display:grid;gap:10px}.lesson-list:before{content:"";position:absolute;left:17px;top:12px;bottom:12px;width:1px;background:#dedbd2}.lesson{position:relative;display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:58px;padding:10px 10px 10px 48px;border-radius:14px;background:#f5f5f2}.lesson:before{content:"";position:absolute;left:11px;width:13px;height:13px;border:5px solid #f5f5f2;border-radius:50%;background:var(--gold);box-shadow:0 0 0 1px #d3cec0}.lesson span:first-child{font-weight:700}.lesson button{padding:8px 11px;border-radius:999px;background:var(--gold);font-size:.78rem}.locked{opacity:.72}.locked .course-cover{filter:grayscale(.8)}.locked-note{display:flex;gap:8px;align-items:flex-start;padding:12px;border-radius:13px;background:#f3f0e8;color:#6e654f;font-size:.88rem;line-height:1.4}@media(max-width:700px){.shell{padding:14px}.card{padding:24px;border-radius:22px}.login-intro{margin-inline:-24px;padding-inline:24px}.app-header{padding:20px 18px}.topbar{align-items:flex-start}.topbar h1{font-size:1.65rem}.topbar .secondary{padding:10px 12px;font-size:.8rem}.admin-body,.student-body{padding:18px 14px 42px}.grid{grid-template-columns:1fr}.grid .full{grid-column:auto}.pane{padding:18px}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.course{border-radius:18px}.course-cover{min-height:150px;padding:16px}.course-mark{width:38px;height:38px}.course-cover h2{font-size:1.25rem}.course-cover p{font-size:.76rem}.course-content{padding:14px}.course-status{display:block}.course-status span{display:block;margin-top:3px}.lesson-list{gap:8px}.lesson{display:grid;gap:7px;min-height:70px;padding:10px 9px 10px 42px;font-size:.84rem}.lesson:before{left:9px}.lesson-list:before{left:15px}.lesson button{width:100%;padding:8px}.badge{font-size:.68rem}.section-heading h2{font-size:1.4rem}}@media(max-width:420px){.course-grid{grid-template-columns:1fr}.course-cover{min-height:175px}.course-cover h2{font-size:1.5rem}}