:root{--bg:#f6f6fb;--surface:#fff;--surface-2:#efeef7;--ink:#17151f;--ink-soft:#4e4a60;--ink-faint:#8b87a0;--line:#e5e3f0;--accent:#5b4dff;--accent-deep:#4638d6;--accent-soft:#edebff;--accent-ink:#fff;--green-bg:#e0f5ec;--green-ink:#0b6b52;--amber-bg:#fdefd9;--amber-ink:#8a5a00;--rose-bg:#fde4ec;--rose-ink:#a91e57;--star:#f0a11c;--player-bg:#14121d;--radius:16px;--radius-sm:10px;--shadow-1:0 1px 2px #17151f0d, 0 4px 16px #17151f0f;--shadow-2:0 2px 4px #17151f0f, 0 12px 32px #17151f1f;--font-display:"Space Grotesk", "Inter", sans-serif;--font-body:"Inter", system-ui, -apple-system, sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-body);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;margin:0;font-size:16px;line-height:1.6}img,video{max-width:100%;display:block}h1,h2,h3{font-family:var(--font-display);letter-spacing:-.01em;margin:0;font-weight:600;line-height:1.15}p{margin:0}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:0;padding:0}.container{width:min(1120px,100% - 48px);margin-inline:auto}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}html{scroll-behavior:auto}}.app{flex-direction:column;min-height:100vh;display:flex}.screen{flex:1}.eyebrow{letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-size:13px;font-weight:600}.section-title{margin-bottom:24px;font-size:28px}.btn{border-radius:999px;justify-content:center;align-items:center;gap:8px;padding:10px 22px;font-size:15px;font-weight:600;transition:transform .15s,box-shadow .15s,background-color .15s,border-color .15s,color .15s;display:inline-flex}.btn-primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 8px 20px #5b4dff47}.btn-primary:hover{background:var(--accent-deep);transform:translateY(-1px)}.btn-lg{padding:14px 30px;font-size:17px}.btn-sm{padding:7px 16px;font-size:14px}.btn-outline{border:1.5px solid var(--line);background:var(--surface);color:var(--ink)}.btn-outline:hover{border-color:var(--accent);color:var(--accent)}.btn-block{width:100%}.btn-ghost{color:var(--accent);border-radius:var(--radius-sm);padding:8px 14px;font-size:14.5px;font-weight:600;transition:background-color .15s}.btn-ghost:hover{background:var(--accent-soft)}.btn-ghost:disabled{color:var(--ink-faint);cursor:default;background:0 0}.icon-btn{width:40px;height:40px;color:var(--ink-soft);border-radius:12px;justify-content:center;align-items:center;transition:background-color .15s,color .15s;display:inline-flex}.icon-btn:hover{background:var(--surface-2);color:var(--ink)}.icon-btn svg{width:22px;height:22px}.top-nav{z-index:20;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);background:#f6f6fbd9;position:sticky;top:0}.top-nav-inner{justify-content:space-between;align-items:center;height:68px;display:flex}.brand{font-family:var(--font-display);letter-spacing:-.01em;align-items:center;gap:10px;font-size:20px;font-weight:700;display:inline-flex}.brand svg{width:26px;height:26px;color:var(--accent)}.top-nav-links{align-items:center;gap:28px;font-size:15px;font-weight:500;display:flex}.top-nav-links>a{color:var(--ink-soft);transition:color .15s}.top-nav-links>a:hover{color:var(--ink)}.hero{padding:72px 0 56px}.hero-inner{grid-template-columns:1.05fr 1fr;align-items:center;gap:56px;display:grid}.hero-img{aspect-ratio:4/3;object-fit:cover;width:100%;box-shadow:var(--shadow-2);border-radius:24px}.hero-copy .eyebrow{margin-bottom:16px}.hero-copy h1{margin-bottom:20px;font-size:clamp(40px,4.6vw,56px)}.hero-sub{color:var(--ink-soft);max-width:46ch;margin-bottom:32px;font-size:18px}.featured{padding:24px 0 56px}.course-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.course-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);flex-direction:column;transition:transform .18s,box-shadow .18s,border-color .18s;display:flex;overflow:hidden}.course-card:hover{box-shadow:var(--shadow-2);border-color:#d8d5ea;transform:translateY(-3px)}.course-card-img{aspect-ratio:16/10;object-fit:cover;width:100%}.course-card-body{flex-direction:column;flex:1;gap:8px;padding:18px 20px 20px;display:flex}.course-card-topic{letter-spacing:.1em;text-transform:uppercase;color:var(--accent);font-size:12px;font-weight:600}.course-card-title{font-size:19px}.course-card-tagline{color:var(--ink-soft);flex:1;font-size:14.5px}.course-card-meta{align-items:center;gap:12px;margin-top:6px;display:flex}.course-card-hours{color:var(--ink-soft);align-items:center;gap:6px;font-size:13.5px;font-weight:500;display:inline-flex}.course-card-hours svg{width:16px;height:16px}.badge{white-space:nowrap;border-radius:999px;align-items:center;gap:6px;padding:4px 12px;font-size:13px;font-weight:600;display:inline-flex}.badge svg{width:15px;height:15px}.badge-beginner{background:var(--green-bg);color:var(--green-ink)}.badge-intermediate{background:var(--amber-bg);color:var(--amber-ink)}.badge-advanced{background:var(--rose-bg);color:var(--rose-ink)}.badge-duration{background:var(--surface-2);color:var(--ink-soft)}.why{padding:40px 0 80px}.why-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.why-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:28px}.why-icon{background:var(--accent-soft);width:52px;height:52px;color:var(--accent);border-radius:14px;justify-content:center;align-items:center;margin-bottom:18px;display:inline-flex}.why-icon svg{width:28px;height:28px}.why-card h3{margin-bottom:8px;font-size:19px}.why-card p{color:var(--ink-soft);font-size:15px}.catalog-bar{z-index:20;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);background:#f6f6fbe6;padding-bottom:14px;position:sticky;top:0}.catalog-bar-inner{justify-content:space-between;align-items:center;gap:16px;height:68px;display:flex}.home-btn{border:1.5px solid var(--line);background:var(--surface);border-radius:999px;flex-shrink:0;width:44px;height:44px}.home-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--surface)}.search-box{background:var(--surface);border:1.5px solid var(--line);border-radius:999px;align-items:center;gap:10px;width:min(360px,100%);height:44px;padding:0 18px;transition:border-color .15s,box-shadow .15s;display:flex}.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px #5b4dff26}.search-box svg{width:18px;height:18px;color:var(--ink-faint);flex-shrink:0}.search-box input{font:inherit;width:100%;color:var(--ink);background:0 0;border:0;outline:0;font-size:15px}.search-box input::placeholder{color:var(--ink-faint)}.filter-bar{justify-content:space-between;align-items:center;gap:16px;display:flex}.filter-selects{flex-wrap:wrap;gap:12px;display:flex}.select-wrap{align-items:center;display:inline-flex;position:relative}.select-wrap select{appearance:none;border:1.5px solid var(--line);background:var(--surface);font:inherit;color:var(--ink);cursor:pointer;border-radius:999px;padding:9px 40px 9px 18px;font-size:14.5px;font-weight:500;transition:border-color .15s}.select-wrap select:hover{border-color:#cdc9e2}.select-wrap>svg{width:16px;height:16px;color:var(--ink-faint);pointer-events:none;position:absolute;right:14px}.catalog-main{padding:28px 0 72px}.results-count{color:var(--ink-faint);margin-bottom:18px;font-size:14px}.empty-state{text-align:center;background:var(--surface);border:1.5px dashed var(--line);border-radius:var(--radius);padding:72px 24px}.empty-state svg{width:40px;height:40px;color:var(--ink-faint);margin-bottom:12px;margin-inline:auto}.empty-state h2{margin-bottom:8px;font-size:22px}.empty-state p{color:var(--ink-soft);margin-bottom:20px}.detail-screen{padding:28px 0 72px}.back-link{color:var(--ink-soft);align-items:center;gap:8px;margin-bottom:24px;font-size:14.5px;font-weight:600;transition:color .15s;display:inline-flex}.back-link:hover{color:var(--accent)}.back-link svg{width:18px;height:18px}.detail-head{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-1);border-radius:20px;grid-template-columns:420px 1fr;align-items:center;gap:40px;margin-bottom:32px;padding:28px;display:grid}.detail-img{aspect-ratio:16/10;object-fit:cover;border-radius:14px;width:100%}.detail-head-copy .eyebrow{margin-bottom:10px}.detail-head-copy h1{margin-bottom:14px;font-size:clamp(28px,3.4vw,40px)}.detail-rating{margin-bottom:14px}.rating{align-items:center;gap:8px;display:inline-flex}.rating-stars{color:var(--star);gap:2px;display:inline-flex}.rating-stars svg{width:18px;height:18px}.rating-value{font-size:15px;font-weight:600}.rating-count{color:var(--ink-faint);font-size:14px}.detail-badges{gap:10px;margin-bottom:16px;display:flex}.detail-tagline{color:var(--ink-soft);max-width:52ch}.detail-grid{grid-template-columns:1.6fr 1fr;align-items:start;gap:28px;display:grid}.detail-section{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:26px 28px}.detail-section+.detail-section{margin-top:20px}.detail-section h2{margin-bottom:14px;font-size:21px}.detail-section>p{color:var(--ink-soft)}.curriculum-list{margin:0;padding:0;list-style:none}.curriculum-list li{border-top:1px solid var(--line);align-items:center;gap:14px;padding:12px 0;font-size:15.5px;font-weight:500;display:flex}.curriculum-list li:first-child{border-top:0;padding-top:4px}.curriculum-idx{font-family:var(--font-display);color:var(--accent);background:var(--accent-soft);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:13px;font-weight:600;display:inline-flex}.prereq-list{color:var(--ink-soft);flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.prereq-list li{padding-left:22px;position:relative}.prereq-list li:before{content:"";background:var(--accent);opacity:.55;border-radius:50%;width:8px;height:8px;position:absolute;top:9px;left:0}.detail-aside{flex-direction:column;gap:20px;display:flex;position:sticky;top:24px}.aside-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:24px}.aside-card h2{margin-bottom:16px;font-size:18px}.instructor-row{align-items:center;gap:14px;margin-bottom:14px;display:flex}.instructor-avatar{object-fit:cover;border-radius:50%;width:56px;height:56px}.instructor-name{font-weight:600}.instructor-role{color:var(--ink-faint);font-size:13.5px}.instructor-bio{color:var(--ink-soft);font-size:14.5px}.lesson-row{background:var(--surface-2);border-radius:var(--radius-sm);align-items:center;gap:14px;margin-bottom:14px;padding:14px 16px;transition:background-color .15s;display:flex}.lesson-row:hover{background:var(--accent-soft)}.lesson-play{background:var(--accent);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;display:inline-flex}.lesson-play svg{width:18px;height:18px;margin-left:2px}.lesson-row-copy{flex-direction:column;display:flex}.lesson-row-title{font-size:15px;font-weight:600}.lesson-row-length{color:var(--ink-faint);font-size:13px}.lesson-screen{padding:28px 0 72px}.lesson-container{width:min(920px,100% - 48px)}.player{background:var(--player-bg);box-shadow:var(--shadow-2);border-radius:20px;overflow:hidden}.player-stage{background:#000;position:relative}.player-video{aspect-ratio:16/9;object-fit:cover;cursor:pointer;width:100%}.player-overlay{background:linear-gradient(#0a08141f,#0a081461);justify-content:center;align-items:center;transition:background-color .2s;display:flex;position:absolute;inset:0}.player-overlay-btn{width:84px;height:84px;color:var(--accent);background:#fffffff0;border-radius:50%;justify-content:center;align-items:center;transition:transform .18s;display:flex;box-shadow:0 12px 40px #00000059}.player-overlay:hover .player-overlay-btn{transform:scale(1.06)}.player-overlay-btn svg{width:34px;height:34px;margin-left:4px}.player-controls{align-items:center;gap:14px;padding:12px 18px;display:flex}.player-btn{color:#cfcbe6;flex-shrink:0;width:38px;height:38px}.player-btn:hover{color:#fff;background:#ffffff1a}.player-btn svg{width:20px;height:20px}.player-track{cursor:pointer;flex:1;align-items:center;height:20px;display:flex;position:relative}.player-track:before{content:"";background:#ffffff2e;border-radius:999px;height:4px;position:absolute;top:8px;left:0;right:0}.player-track-fill{background:linear-gradient(90deg, #7d71ff, var(--accent));border-radius:999px;height:4px;position:absolute;top:8px;left:0}.player-knob{pointer-events:none;background:#fff;border-radius:50%;width:14px;height:14px;margin-left:-7px;position:absolute;top:50%;transform:translateY(-50%);box-shadow:0 1px 6px #0006}.player-time{font-variant-numeric:tabular-nums;color:#cfcbe6;white-space:nowrap;font-size:13.5px}.lesson-info{padding:32px 4px 0}.lesson-info .eyebrow{margin-bottom:10px}.lesson-info h1{margin-bottom:14px;font-size:clamp(26px,3vw,34px)}.lesson-info>p{color:var(--ink-soft);max-width:68ch;margin-bottom:12px}.lesson-info .btn{margin-top:16px}.modal-backdrop{z-index:50;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#120f1e80;justify-content:center;align-items:center;padding:24px;animation:.18s fade-in;display:flex;position:fixed;inset:0}.modal{background:var(--surface);width:min(400px,100%);box-shadow:var(--shadow-2);border-radius:20px;padding:32px;animation:.2s pop-in;position:relative}@keyframes fade-in{0%{opacity:0}}@keyframes pop-in{0%{opacity:0;transform:translateY(10px)scale(.97)}}.modal-close{position:absolute;top:14px;right:14px}.modal-title{margin-bottom:6px;font-size:24px}.modal-sub{color:var(--ink-soft);margin-bottom:22px;font-size:14.5px}.modal-form{flex-direction:column;gap:16px;display:flex}.modal-form label{color:var(--ink-soft);flex-direction:column;gap:6px;font-size:13.5px;font-weight:600;display:flex}.modal-form input{font:inherit;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:var(--bg);color:var(--ink);padding:11px 14px;font-size:15px;transition:border-color .15s,box-shadow .15s}.modal-form input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px #5b4dff26}.modal-foot{color:var(--ink-faint);text-align:center;margin-top:18px;font-size:13.5px}.modal-success{text-align:center;padding:18px 0 8px}.modal-success svg{width:52px;height:52px;color:var(--accent);margin-inline:auto;margin-bottom:12px}.modal-success h2{margin-bottom:6px;font-size:22px}.modal-success p{color:var(--ink-soft)}.site-footer{border-top:1px solid var(--line);background:var(--surface)}.footer-inner{justify-content:space-between;align-items:flex-start;gap:32px;padding:36px 0;display:flex}.footer-brand{max-width:420px}.footer-brand .brand{font-size:18px}.footer-about{color:var(--ink-soft);margin-top:10px;font-size:14px}.footer-meta{color:var(--ink-faint);padding-top:4px;font-size:13.5px}.footer-meta a{color:var(--ink-soft);text-decoration:underline}.instructor-link{border-radius:var(--radius-sm);margin:-10px -12px 4px;padding:10px 12px;transition:background-color .15s}.instructor-link:hover{background:var(--surface-2)}.instructor-chevron{width:18px;height:18px;color:var(--ink-faint);flex-shrink:0;margin-left:auto;transition:transform .15s,color .15s}.instructor-link:hover .instructor-chevron{color:var(--accent);transform:translate(2px)}.instructor-screen{padding:28px 0 72px}.instructor-container{width:min(880px,100% - 48px)}.profile-head{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-1);border-radius:20px;align-items:center;gap:28px;margin-bottom:20px;padding:28px;display:flex}.profile-avatar{object-fit:cover;width:112px;height:112px;box-shadow:var(--shadow-1);border-radius:50%;flex-shrink:0}.profile-head-copy h1{margin-bottom:4px;font-size:clamp(26px,3vw,34px)}.profile-role{color:var(--ink-soft);margin-bottom:10px;font-size:15.5px}.profile-rating{margin-bottom:10px}.profile-meta{color:var(--ink-faint);font-size:14px}.profile-section{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:26px 28px}.profile-section+.profile-section{margin-top:20px}.profile-section h2{margin-bottom:14px;font-size:21px}.profile-section>p{color:var(--ink-soft)}.profile-section>p+p{margin-top:12px}.chip-row{flex-wrap:wrap;gap:10px;margin:0;padding:0;list-style:none;display:flex}.chip{background:var(--accent-soft);color:var(--accent-deep);white-space:nowrap;border-radius:999px;align-items:center;padding:6px 14px;font-size:13.5px;font-weight:600;display:inline-flex}.course-rows{flex-direction:column;gap:14px;display:flex}.section-head{justify-content:space-between;align-items:center;gap:16px;min-height:40px;margin-bottom:14px;display:flex}.section-head h2{margin-bottom:0}.section-search-btn{border:1.5px solid var(--line);background:var(--surface);border-radius:999px;flex-shrink:0;width:38px;height:38px}.section-search-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--surface)}.section-search-btn svg{width:18px;height:18px}.course-search{width:min(320px,100%);height:40px;padding:0 6px 0 14px;animation:.18s search-in}@keyframes search-in{0%{opacity:0;transform:translate(8px)}}.course-search input::-webkit-search-cancel-button{appearance:none}.search-clear{width:28px;height:28px;color:var(--ink-faint);border-radius:8px;flex-shrink:0}.search-clear:hover{color:var(--ink);background:var(--surface-2)}.search-clear svg{width:16px;height:16px}.course-empty{text-align:center;border:1.5px dashed var(--line);border-radius:var(--radius-sm);background:var(--bg);padding:36px 24px}.course-empty svg{width:28px;height:28px;color:var(--ink-faint);margin-inline:auto;margin-bottom:10px}.course-empty p{color:var(--ink-soft);margin-bottom:16px;font-size:14.5px}.course-row{background:var(--surface-2);border-radius:var(--radius-sm);align-items:center;gap:18px;padding:14px;transition:background-color .15s,transform .15s;display:flex}.course-row:hover{background:var(--accent-soft);transform:translateY(-1px)}.course-row-img{aspect-ratio:16/10;object-fit:cover;border-radius:8px;flex-shrink:0;width:168px}.course-row-body{flex:1;min-width:0}.course-row-title{margin:2px 0 4px;font-size:17px}.course-row-tagline{color:var(--ink-soft);font-size:14px}.course-row-meta{flex-direction:column;flex-shrink:0;align-items:flex-end;gap:8px;display:flex}.reviews-grid{grid-template-columns:172px 1fr;align-items:start;gap:28px;display:grid}.review-summary{text-align:center;padding:12px 0}.review-summary-score{font-family:var(--font-display);margin-bottom:8px;font-size:48px;font-weight:700;line-height:1}.review-summary-count{color:var(--ink-faint);margin-top:6px;font-size:13.5px}.review-list{border-left:1px solid var(--line);margin:0;padding:0 0 0 28px;list-style:none}.review-item{border-top:1px solid var(--line);gap:14px;padding:16px 0;display:flex}.review-item:first-child{border-top:0;padding-top:4px}.review-avatar{background:var(--accent-soft);width:40px;height:40px;color:var(--accent-deep);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13.5px;font-weight:700;display:inline-flex}.review-body{min-width:0}.review-meta{align-items:center;gap:8px;margin-bottom:6px;display:flex}.review-meta .rating-stars svg{width:15px;height:15px}.review-time{color:var(--ink-faint);font-size:13px}.review-text{color:var(--ink-soft);font-size:14.5px}@media (width<=720px){.profile-head{flex-direction:column;align-items:flex-start;gap:18px}.section-head{flex-wrap:wrap}.course-search{width:100%}.course-row{flex-wrap:wrap}.course-row-img{width:100%}.course-row-meta{flex-direction:row;align-items:center;width:100%}.reviews-grid{grid-template-columns:1fr;gap:8px}.review-list{border-left:0;padding-left:0}}@media (width<=960px){.hero{padding-top:48px}.hero-inner{grid-template-columns:1fr;gap:32px}.course-grid{grid-template-columns:repeat(2,1fr)}.why-grid{grid-template-columns:1fr}.detail-head{grid-template-columns:1fr;gap:24px}.detail-grid{grid-template-columns:1fr}.detail-aside{position:static}}@media (width<=620px){.course-grid{grid-template-columns:1fr}.top-nav-links{gap:16px}.catalog-bar-inner{flex-wrap:wrap;height:auto;padding:12px 0}.filter-bar{flex-wrap:wrap}.footer-inner{flex-direction:column;gap:16px}}
