:root{--black:#0B0B0D;--graphite:#17171B;--graphite2:#202027;--white:#fff;--light:#E7E7EA;--muted:#A1A1AA;--orange:#FF6A00;--orange2:#FF934D;--border:rgba(255,255,255,.09);--shadow:0 24px 70px rgba(0,0,0,.35);--radius:18px}
*{box-sizing:border-box}html{color-scheme:dark}body{margin:0;min-height:100vh;background:radial-gradient(circle at 12% 8%,rgba(255,106,0,.12),transparent 28rem),radial-gradient(circle at 90% 80%,rgba(255,147,77,.07),transparent 30rem),var(--black);color:var(--light);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input{font:inherit}button{cursor:pointer}a{color:inherit}.hidden{display:none!important}
.auth-shell{width:min(1120px,calc(100% - 32px));min-height:100vh;margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr) 440px;align-items:center;gap:72px;padding:48px 0 72px;position:relative}.auth-brand{display:flex;align-items:center;gap:24px}.brand-mark{width:76px;height:76px;display:grid;place-items:center;border-radius:22px;background:linear-gradient(145deg,var(--orange2),var(--orange));color:#fff;font-weight:900;letter-spacing:-3px;font-size:28px;box-shadow:0 18px 45px rgba(255,106,0,.22)}.brand-mark.small{width:42px;height:42px;border-radius:12px;font-size:16px;letter-spacing:-1px}.brand-name{font-size:clamp(30px,4vw,48px);font-weight:800;letter-spacing:-2px;color:#fff}.brand-name span{color:var(--orange)}.brand-name.compact{font-size:18px;letter-spacing:-.7px}.auth-brand p{margin:10px 0 0;color:var(--muted);font-size:17px;max-width:460px;line-height:1.6}.auth-card{background:linear-gradient(180deg,rgba(31,31,37,.96),rgba(20,20,24,.96));border:1px solid var(--border);border-radius:24px;padding:36px;box-shadow:var(--shadow)}.eyebrow,.topbar-label{color:var(--orange2);letter-spacing:.16em;font-size:11px;font-weight:800;margin:0 0 12px}.auth-card h1{margin:0;color:#fff;letter-spacing:-1px;font-size:32px}.muted{color:var(--muted);line-height:1.6;margin:10px 0 26px}.form-stack{display:grid;gap:18px}.form-stack label{display:grid;gap:8px;color:var(--light);font-size:13px;font-weight:700}input{width:100%;height:50px;border:1px solid var(--border);border-radius:11px;background:rgba(5,5,7,.55);color:#fff;padding:0 14px;outline:none;transition:.2s}input:focus{border-color:rgba(255,106,0,.8);box-shadow:0 0 0 4px rgba(255,106,0,.1)}.password-wrap{position:relative}.password-wrap input{padding-right:64px}.icon-button{border:0;background:transparent;color:var(--muted)}.password-toggle{position:absolute;right:12px;top:50%;transform:translateY(-50%);font-size:12px;font-weight:800}.button{border:0;border-radius:11px;min-height:50px;padding:0 18px;font-weight:800;transition:.2s}.button:hover{transform:translateY(-1px);filter:brightness(1.05)}.button:disabled{opacity:.55;cursor:wait;transform:none}.button-primary{background:linear-gradient(135deg,var(--orange),#ff7f22);color:#fff;box-shadow:0 12px 28px rgba(255,106,0,.18)}.button-secondary{background:var(--graphite2);color:#fff;border:1px solid var(--border)}.text-button{margin-top:18px;border:0;padding:0;background:transparent;color:var(--orange2);font-weight:700;font-size:13px}.auth-help{margin-top:28px;padding-top:22px;border-top:1px solid var(--border);display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:12px}.auth-help a{color:var(--light);text-decoration:none}.auth-footer{position:absolute;left:0;bottom:24px;color:#71717a;font-size:12px}
.app-shell{min-height:100vh;display:grid;grid-template-columns:250px minmax(0,1fr)}.sidebar{position:sticky;top:0;height:100vh;border-right:1px solid var(--border);background:rgba(12,12,15,.92);backdrop-filter:blur(18px);padding:24px 18px;display:flex;flex-direction:column;z-index:30}.sidebar-brand{display:flex;align-items:center;gap:12px;padding:0 8px 26px}.nav{display:grid;gap:7px}.nav-item{width:100%;height:46px;border:0;border-radius:11px;display:flex;align-items:center;gap:12px;padding:0 14px;color:var(--muted);background:transparent;text-align:left;font-weight:700}.nav-item:hover{color:var(--light);background:rgba(255,255,255,.04)}.nav-item.active{color:#fff;background:linear-gradient(90deg,rgba(255,106,0,.18),rgba(255,106,0,.04));box-shadow:inset 3px 0 var(--orange)}.nav-icon{width:18px;text-align:center}.sidebar-bottom{margin-top:auto;display:grid;gap:10px;padding:0 8px}.support-link,.logout-button{min-height:42px;display:flex;align-items:center;padding:0 12px;border-radius:10px;text-decoration:none;font-size:13px;font-weight:700}.support-link{color:var(--muted)}.logout-button{border:1px solid var(--border);color:var(--light);background:rgba(255,255,255,.03)}.app-main{min-width:0}.topbar{height:82px;padding:0 32px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--border);background:rgba(11,11,13,.76);backdrop-filter:blur(16px);position:sticky;top:0;z-index:20}.topbar-label{margin:0 0 3px}.topbar strong{color:#fff;font-size:17px}.user-chip{display:flex;align-items:center;gap:10px;color:var(--light);font-size:13px;font-weight:700}.user-avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--orange),var(--orange2));display:grid;place-items:center;color:#fff;font-weight:900}.mobile-menu{display:none;border:1px solid var(--border);background:var(--graphite);color:#fff;width:42px;height:42px;border-radius:10px}.content{width:min(1160px,calc(100% - 64px));margin:0 auto;padding:44px 0 70px}.hero{position:relative;overflow:hidden;min-height:240px;border:1px solid var(--border);border-radius:24px;padding:40px;background:radial-gradient(circle at 82% 25%,rgba(255,106,0,.32),transparent 20rem),linear-gradient(120deg,#17171b 0%,#101013 62%,#1b1008 100%);box-shadow:var(--shadow)}.hero:after{content:"";position:absolute;width:280px;height:280px;border:1px solid rgba(255,255,255,.08);border-radius:50%;right:-60px;top:-95px;box-shadow:0 0 0 38px rgba(255,255,255,.02),0 0 0 76px rgba(255,255,255,.015)}.hero-content{position:relative;z-index:1;max-width:680px}.hero h1{color:#fff;font-size:clamp(30px,4vw,46px);line-height:1.08;letter-spacing:-1.8px;margin:0 0 14px}.hero p{color:#c7c7cc;line-height:1.65;margin:0;max-width:620px}.section-heading{margin:42px 0 18px;display:flex;align-items:end;justify-content:space-between;gap:20px}.section-heading h2{color:#fff;margin:0;font-size:22px;letter-spacing:-.7px}.section-heading p{margin:6px 0 0;color:var(--muted);font-size:13px}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.course-card{overflow:hidden;border:1px solid var(--border);border-radius:var(--radius);background:linear-gradient(180deg,#1b1b20,#141417);min-height:330px;display:flex;flex-direction:column}.course-cover{height:150px;position:relative;background:radial-gradient(circle at 76% 25%,rgba(255,147,77,.65),transparent 26%),linear-gradient(135deg,#341708,#111114 68%);overflow:hidden}.course-cover:before,.course-cover:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.13);border-radius:24px;transform:rotate(24deg)}.course-cover:before{width:165px;height:95px;right:-22px;top:20px}.course-cover:after{width:120px;height:70px;right:32px;top:54px}.course-cover-label{position:absolute;left:18px;bottom:16px;z-index:2;color:#fff;font-weight:900;font-size:13px;letter-spacing:.06em}.course-body{padding:22px;display:flex;flex-direction:column;flex:1}.status-pill{align-self:flex-start;color:#ffd4b5;background:rgba(255,106,0,.12);border:1px solid rgba(255,106,0,.22);padding:6px 9px;border-radius:999px;font-size:10px;font-weight:800;letter-spacing:.06em;text-transform:uppercase}.course-card h3{margin:14px 0 8px;color:#fff;font-size:18px;letter-spacing:-.4px}.course-card p{color:var(--muted);font-size:13px;line-height:1.55;margin:0 0 20px}.course-card .button{margin-top:auto;width:100%}.empty-state,.account-card{border:1px solid var(--border);background:var(--graphite);border-radius:var(--radius);padding:32px}.empty-state{text-align:center}.empty-state h3,.account-card h2{color:#fff;margin:0 0 8px}.empty-state p,.account-card p{color:var(--muted);line-height:1.6}.loading-state{min-height:360px;display:grid;place-items:center;align-content:center;gap:14px;color:var(--muted)}.spinner{width:32px;height:32px;border-radius:50%;border:3px solid rgba(255,255,255,.12);border-top-color:var(--orange);animation:spin .85s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.course-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:22px}.video-panel,.lesson-panel{border:1px solid var(--border);border-radius:var(--radius);background:var(--graphite);overflow:hidden}.video-wrap{background:#000;aspect-ratio:16/9}.video-wrap iframe{width:100%;height:100%;border:0;display:block}.lesson-info{padding:24px}.lesson-info h1{color:#fff;margin:0 0 10px;font-size:clamp(24px,3vw,34px);letter-spacing:-1px}.lesson-info p{color:var(--muted);line-height:1.65}.lesson-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.lesson-panel{padding:18px;align-self:start;position:sticky;top:104px}.lesson-panel h3{color:#fff;margin:4px 4px 14px}.lesson-list{display:grid;gap:8px}.lesson-item{border:1px solid transparent;border-radius:11px;padding:13px;background:rgba(255,255,255,.025);color:var(--muted);text-align:left}.lesson-item.active{border-color:rgba(255,106,0,.38);background:rgba(255,106,0,.08);color:#fff}.lesson-index{display:block;color:var(--orange2);font-size:10px;font-weight:900;letter-spacing:.08em;margin-bottom:5px}.course-back{display:inline-flex;align-items:center;gap:8px;color:var(--muted);border:0;background:transparent;padding:0;margin-bottom:20px}.account-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.detail-list{display:grid;gap:14px;margin-top:24px}.detail-row{padding:14px 0;border-top:1px solid var(--border);display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:13px}.detail-row strong{color:var(--light);text-align:right}.toast{position:fixed;right:22px;top:22px;z-index:100;min-width:260px;max-width:420px;border:1px solid var(--border);border-radius:12px;padding:14px 16px;background:#202025;color:#fff;box-shadow:var(--shadow);transform:translateY(-20px);opacity:0;pointer-events:none;transition:.25s}.toast.show{transform:translateY(0);opacity:1}.toast.error{border-color:rgba(255,95,109,.45)}.toast.success{border-color:rgba(56,193,114,.45)}
@media(max-width:980px){.auth-shell{grid-template-columns:1fr;gap:36px;max-width:540px}.auth-brand{padding-top:30px}.auth-footer{position:static;text-align:center;grid-column:1}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.course-layout{grid-template-columns:1fr}.lesson-panel{position:static}}@media(max-width:760px){.app-shell{display:block}.sidebar{position:fixed;left:0;transform:translateX(-102%);width:260px;transition:transform .25s;box-shadow:25px 0 70px rgba(0,0,0,.5)}.sidebar.open{transform:translateX(0)}.mobile-menu{display:grid;place-items:center}.topbar{padding:0 18px;justify-content:flex-start}.user-chip{margin-left:auto}.user-chip span{display:none}.content{width:min(100% - 28px,1160px);padding:28px 0 54px}.hero{padding:28px;min-height:220px}.course-grid{grid-template-columns:1fr}.account-grid{grid-template-columns:1fr}}@media(max-width:540px){.auth-shell{width:min(100% - 24px,500px);padding-top:24px;align-content:center}.auth-brand{align-items:flex-start;gap:14px}.brand-mark{width:54px;height:54px;border-radius:15px;font-size:20px}.brand-name{font-size:27px;letter-spacing:-1px}.auth-brand p{font-size:14px;margin-top:6px}.auth-card{padding:25px 20px;border-radius:18px}.auth-card h1{font-size:27px}.auth-help{display:grid}.hero{border-radius:18px}.hero h1{font-size:32px}.section-heading{align-items:flex-start}.lesson-info{padding:20px}.lesson-actions{display:grid}.lesson-actions .button{width:100%}}