@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--bg:#fafbfc;--surface:#fff;--surface2:#f8f9fa;--border:#e1e5e9;--text:#1a202c;--muted:#718096;--accent:#3182ce;--accent2:#4299e1;--success:#38a169;--warning:#d69e2e;--danger:#e53e3e;--radius:8px;--font-d:"Inter", sans-serif;--font-b:"Inter", sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:var(--font-b);min-height:100vh;font-size:15px;line-height:1.6}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:var(--font-b);background:0 0;border:none}input{font-family:var(--font-b)}@keyframes fadeUp{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes spin{to{transform:rotate(360deg)}}.navbar{z-index:100;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);background:#fffffff2;position:sticky;top:0}.navbar_inner{align-items:center;gap:20px;max-width:1200px;height:64px;margin:0 auto;padding:0 24px;display:flex}.navbar_logo{align-items:center;gap:10px;display:flex}.navbar_logo-icon{background:linear-gradient(135deg, var(--accent), var(--accent2));border-radius:9px;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;font-size:16px;display:flex}.navbar_logo-text{font-family:var(--font-d);letter-spacing:-.02em;font-size:18px;font-weight:800}.navbar_links{gap:4px;display:flex}.navbar_link{color:var(--muted);border-radius:8px;padding:6px 14px;font-size:14px;font-weight:500;transition:color .2s,background .2s}.navbar_link:hover{color:var(--text);background:var(--surface2)}.navbar_actions{align-items:center;gap:10px;margin-left:auto;display:flex}.navbar_avatar-chip{background:var(--surface2);border:1px solid var(--border);border-radius:40px;align-items:center;gap:8px;padding:5px 12px 5px 6px;display:flex}.navbar_avatar-circle{background:linear-gradient(135deg, var(--accent), var(--accent2));border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:11px;font-weight:800;display:flex}.navbar_avatar-name{font-size:13px;font-weight:600}.navbar_signout-btn{color:var(--muted);background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:6px 14px;font-size:14px;font-weight:500;transition:color .2s,border-color .2s}.navbar_signout-btn:hover{color:var(--danger);border-color:var(--danger)}.navbar_signin-btn{color:#fff;background:linear-gradient(135deg, var(--accent), var(--accent2));border-radius:8px;padding:8px 20px;font-size:14px;font-weight:700;transition:opacity .2s}.navbar_signin-btn:hover{opacity:.88}.login-page{background-image:radial-gradient(at 65% 15%,#3182ce14 0%,#0000 55%);justify-content:center;align-items:center;min-height:calc(100vh - 64px);padding:20px;display:flex}.login-page_inner{width:100%;max-width:420px}.login-page_hero{text-align:center;margin-bottom:36px}.login-page_logo-icon{background:linear-gradient(135deg, var(--accent), var(--accent2));border-radius:14px;justify-content:center;align-items:center;width:56px;height:56px;margin:0 auto 16px;font-size:26px;display:flex}.login-page_heading{font-family:var(--font-d);margin-bottom:6px;font-size:28px;font-weight:800}.login-page_subheading{color:var(--muted)}.login-page_card{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:32px}.login-page_hint{color:var(--muted);background:#3182ce1a;border:1px solid #3182ce40;border-radius:10px;margin-bottom:22px;padding:11px 15px;font-size:13px;line-height:1.5}.login-page_hint strong{color:var(--accent2)}.login-page_field{margin-bottom:14px}.login-page_label{margin-bottom:5px;font-size:13px;font-weight:600;display:block}.login-page_input{background:var(--surface2);border:1px solid var(--border);width:100%;color:var(--text);border-radius:10px;outline:none;padding:11px 14px;font-size:14px;transition:border-color .2s}.login-page_input:focus{border-color:var(--accent)}.login-page_error{color:var(--danger);background:#f871711a;border:1px solid #f871714d;border-radius:8px;margin-bottom:14px;padding:9px 14px;font-size:13px}.login-page_submit-btn{background:linear-gradient(135deg, var(--accent), var(--accent2));color:#fff;border-radius:10px;width:100%;padding:13px;font-size:15px;font-weight:700;transition:opacity .2s}.login-page_submit-btn:hover{opacity:.88}.login-page_submit-btn:disabled{opacity:.65;cursor:not-allowed}.login-page_alt-hint{text-align:center;color:var(--muted);margin-top:14px;font-size:13px}.login-page_alt-hint strong{color:var(--text)}.progress-bar{width:100%}.progress-bar_label-row{justify-content:space-between;margin-bottom:5px;display:flex}.progress-bar_label{color:var(--muted);font-size:12px}.progress-bar_percent{font-size:12px;font-weight:700}.progress-bar_track{background:var(--surface2);border-radius:99px;overflow:hidden}.progress-bar_fill{border-radius:99px;height:100%;transition:width .6s cubic-bezier(.22,1,.36,1)}.course-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:transform .25s cubic-bezier(.22,1,.36,1),box-shadow .25s cubic-bezier(.22,1,.36,1),border-color .25s cubic-bezier(.22,1,.36,1);overflow:hidden}.course-card--hovered{transform:translateY(-4px)}.course-card__thumbnail{justify-content:center;align-items:center;height:136px;display:flex;position:relative}.course-card_emoji{border-radius:14px;justify-content:center;align-items:center;width:60px;height:60px;font-size:28px;display:flex}.course-card_level-badge{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#0000008c;border-radius:6px;padding:2px 8px;font-size:11px;font-weight:700;position:absolute;top:10px;right:10px}.course-card__enrolled-badge{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:var(--success);background:#22d3a02e;border:1px solid #22d3a04d;border-radius:6px;padding:2px 8px;font-size:11px;font-weight:700;position:absolute;top:10px;left:10px}.course-card_body{padding:18px}.course-card_category{letter-spacing:.06em;text-transform:uppercase;margin-bottom:4px;font-size:11px;font-weight:700}.course-card__title{font-family:var(--font-d);margin-bottom:5px;font-size:15px;font-weight:700;line-height:1.3}.course-card_subtitle{color:var(--muted);margin-bottom:14px;font-size:13px;line-height:1.5}.course-card_meta{gap:12px;margin-bottom:0;display:flex}.course-card_meta-item{color:var(--muted);font-size:12px}.course-card_progress{margin-top:12px}.catalog-page{max-width:1200px;margin:0 auto;padding:40px 24px}.catalog-page_header{margin-bottom:36px}.catalog-page_title{font-family:var(--font-d);letter-spacing:-.03em;margin-bottom:6px;font-size:34px;font-weight:800}.catalog-page_subtitle{color:var(--muted);font-size:16px}.catalog-page_filters{flex-wrap:wrap;gap:10px;margin-bottom:30px;display:flex}.catalog-page_search{background:var(--surface2);border:1px solid var(--border);color:var(--text);border-radius:10px;outline:none;flex:200px;padding:10px 16px;font-size:14px;transition:border-color .2s}.catalog-page_search:focus{border-color:var(--accent)}.catalog-page_filter-btn{border-radius:8px;padding:9px 18px;font-size:13px;font-weight:600;transition:all .2s}.catalog-page_filter-btn--active{background:linear-gradient(135deg, var(--accent), var(--accent2));color:#fff;border:1px solid #0000}.catalog-page_filter-btn--inactive{background:var(--surface2);color:var(--muted);border:1px solid var(--border)}.catalog-page_filter-btn--inactive:hover{color:var(--text);border-color:var(--accent)}.catalog-page__grid{grid-template-columns:repeat(auto-fill,minmax(278px,1fr));gap:20px;display:grid}.catalog-page_empty{text-align:center;color:var(--muted);padding:80px 0}.catalog-page_empty-icon{margin-bottom:10px;font-size:48px}@media (width<=800px){.catalog-page{padding:24px 12px}.catalog-page_filters{flex-direction:column;align-items:stretch;gap:10px}.catalog-page_search{width:100%}.catalog-page__grid{grid-template-columns:1fr}.catalog-page_filter-btn{width:100%}}.course-detail-page{max-width:1200px;margin:0 auto;padding:40px 24px}.course-detail-page_back{color:var(--muted);align-items:center;gap:6px;margin-bottom:28px;font-size:14px;transition:color .2s;display:inline-flex}.course-detail-page_back:hover{color:var(--text)}.course-detail-page_layout{grid-template-columns:minmax(0,1fr) 330px;align-items:start;gap:32px;display:grid}.course-detail-page_pill{border-radius:6px;margin-bottom:12px;padding:3px 12px;font-size:12px;font-weight:700;display:inline-flex}.course-detail-page_title{font-family:var(--font-d);letter-spacing:-.03em;margin-bottom:10px;font-size:30px;font-weight:800;line-height:1.2}.course-detail-page_description{color:var(--muted);margin-bottom:16px;font-size:15px;line-height:1.65}.course-detail-page_meta{color:var(--muted);flex-wrap:wrap;gap:18px;font-size:13px;display:flex}.course-detail-page_curriculum-title{font-family:var(--font-d);margin-top:30px;margin-bottom:14px;font-size:19px;font-weight:700}.course-detail-page_lesson-list{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.course-detail-page_lesson-row{align-items:center;gap:12px;padding:13px 18px;transition:background .15s;display:flex}.course-detail-page_lesson-row+.course-detail-page_lesson-row{border-top:1px solid var(--border)}.course-detail-page_lesson-row--clickable{cursor:pointer}.course-detail-page_lesson-row--clickable:hover{background:var(--surface2)}.course-detail-page_lesson-circle{background:var(--surface2);border:2px solid var(--border);width:26px;height:26px;color:var(--muted);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:11px;font-weight:800;display:flex}.course-detail-page_lesson-circle--done{background:var(--success);border-color:var(--success);color:#000}.course-detail-page_lesson-title{color:var(--text);flex:1;font-size:14px;font-weight:500}.course-detail-page_lesson-title--done{color:var(--success)}.course-detail-page_lesson-duration{color:var(--muted);font-size:12px}.course-detail-page_lesson-arrow{color:var(--muted)}.course-detail-page_right{position:sticky;top:80px}.course-detail-page_enroll-card{background:var(--surface);border:1px solid var(--border);border-radius:20px;overflow:hidden}.course-detail-page_enroll-hero{justify-content:center;align-items:center;height:130px;font-size:48px;display:flex}.course-detail-page_enroll-body{padding:22px}.course-detail-page_progress{margin-bottom:14px}.course-detail-page_enroll-btn{color:#fff;border-radius:10px;width:100%;margin-bottom:14px;padding:13px;font-size:15px;font-weight:700;transition:opacity .2s}.course-detail-page_enroll-btn:hover{opacity:.88}.course-detail-page_course-meta{color:var(--muted);flex-direction:column;gap:9px;font-size:13px;display:flex}.course-detail-page_course-meta-item{align-items:center;gap:9px;display:flex}.course-detail-page_not-found{text-align:center;padding:80px 20px}.course-detail-page_not-found-icon{margin-bottom:12px;font-size:48px}.course-detail-page_not-found-text{color:var(--muted);margin-bottom:12px}.course-detail-page_not-found-link{color:var(--accent)}@media (width<=960px){.course-detail-page{padding:24px 12px}.course-detail-page_layout{grid-template-columns:1fr;gap:20px}.course-detail-page_right{width:100%;margin-top:20px;position:static}.course-detail-page_enroll-card{width:100%}.course-detail-page_lesson-row{padding:11px 14px}.course-detail-page_lesson-title{font-size:13px}.course-detail-page_lesson-duration{font-size:11px}.course-detail-page_probably-video{width:100%}}@media (width<=620px){.course-detail-page_title{font-size:26px}.course-detail-page_meta{gap:10px;font-size:12px}.course-detail-page_enroll-body{padding:16px}.course-detail-page_enroll-btn{padding:11px;font-size:14px}}.lesson-player{margin-top:40px}.lesson-player_card{background:var(--surface);border:1px solid var(--border);border-radius:20px;overflow:hidden}.lesson-player_header{border-bottom:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:12px;padding:14px 22px;display:flex}.lesson-player_header-info{flex:1}.lesson-player_lesson-count{color:var(--muted);margin-bottom:1px;font-size:12px}.lesson-player_lesson-title{font-family:var(--font-d);font-size:17px;font-weight:700}.lesson-player_complete-btn{border-radius:8px;align-items:center;gap:7px;padding:8px 16px;font-size:13px;font-weight:600;transition:all .2s;display:flex}.lesson-player_complete-btn--done{color:var(--success);background:#22d3a024;border:1px solid #22d3a059}.lesson-player_complete-btn--undone{background:var(--surface2);border:1px solid var(--border);color:var(--muted)}.lesson-player_video-wrapper{background:#000}.lesson-player__iframe{aspect-ratio:16/9;background:#000;border:none;width:100%;display:block}.lesson-player_video{width:100%;max-height:520px;display:block}.lesson-player_nav{border-top:1px solid var(--border);justify-content:space-between;align-items:center;padding:14px 22px;display:flex}.lesson-player__nav-btn{border:1px solid var(--border);border-radius:8px;padding:9px 18px;font-size:14px;font-weight:600;transition:opacity .2s}.lesson-player_nav-btn--prev{background:var(--surface2);color:var(--text)}.lesson-player__nav-btn--next-active{background:linear-gradient(135deg, var(--accent), var(--accent2));color:#fff;border:none}.lesson-player_nav-btn--disabled,.lesson-player__nav-btn--disabled{background:var(--surface2);color:var(--muted);cursor:not-allowed;opacity:.5}.lesson-player__counter{color:var(--muted);font-size:13px}.lesson-player_not-found{color:var(--muted);padding:40px 0}.lesson-player_not-enrolled{background:var(--surface);border:1px solid var(--border);text-align:center;color:var(--muted);border-radius:16px;margin-top:32px;padding:32px}@media (width<=860px){.lesson-player{margin-top:20px;padding:0 12px}.lesson-player_card{border-radius:14px}.lesson-player_header,.lesson-player_nav{flex-direction:column;align-items:stretch;padding:12px}.lesson-player_header-info{width:100%;margin-bottom:10px}.lesson-player_complete-btn{justify-content:center;width:100%;padding:10px 0}.lesson-player_video{max-height:280px}.lesson-player__nav-btn,.lesson-player_nav-btn--disabled{flex:1;width:100%;margin-bottom:8px}.lesson-player__counter{text-align:center;width:100%;margin-top:6px}.lesson-player_not-enrolled{padding:24px}}@media (width<=520px){.lesson-player_lesson-title{font-size:16px}.lesson-player_complete-btn{font-size:13px}.lesson-player__nav-btn,.lesson-player_nav-btn--disabled{padding:9px 10px}}.dashboard-page{max-width:1200px;margin:0 auto;padding:40px 24px}.dashboard-page_header{margin-bottom:36px}.dashboard-page_title{font-family:var(--font-d);letter-spacing:-.03em;font-size:32px;font-weight:800}.dashboard-page_subtitle{color:var(--muted);margin-top:5px}.dashboard-page_stats{grid-template-columns:repeat(auto-fit,minmax(175px,1fr));gap:14px;margin-bottom:40px;display:grid}.dashboard-page_stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px}.dashboard-page_stat-icon{margin-bottom:8px;font-size:26px}.dashboard-page_stat-value{font-family:var(--font-d);font-size:30px;font-weight:800}.dashboard-page_stat-label{color:var(--muted);margin-top:2px;font-size:13px}.dashboard-page_section-title{font-family:var(--font-d);margin-bottom:18px;font-size:20px;font-weight:700}.dashboard-page_empty{background:var(--surface);border:1px dashed var(--border);border-radius:var(--radius);text-align:center;padding:60px 40px}.dashboard-page_empty-icon{margin-bottom:12px;font-size:48px}.dashboard-page_empty-text{color:var(--muted);margin-bottom:20px}.dashboard-page_browse-btn{color:#fff;background:linear-gradient(135deg, var(--accent), var(--accent2));border-radius:10px;padding:10px 24px;font-size:14px;font-weight:700;transition:opacity .2s}.dashboard-page_browse-btn:hover{opacity:.88}.dashboard-page_course-list{flex-direction:column;gap:10px;display:flex}.dashboard-page_course-row{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;align-items:center;gap:14px;padding:18px 22px;transition:border-color .2s;display:flex}.dashboard-page_course-emoji{border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:46px;height:46px;font-size:22px;display:flex}.dashboard-page_course-info{flex:1;min-width:0}.dashboard-page_course-title{margin-bottom:5px;font-weight:600}.dashboard-page_course-pct{flex-shrink:0;font-size:13px;font-weight:700}.dashboard-page_course-chevron{color:var(--muted);font-size:18px}@media (width<=800px){.dashboard-page{padding:24px 14px}.dashboard-page_title{font-size:26px}.dashboard-page_stats{grid-template-columns:1fr}.dashboard-page_section-title{font-size:18px}.dashboard-page_empty{padding:40px 18px}.dashboard-page_course-row{flex-direction:column;align-items:flex-start;padding:14px 16px}.dashboard-page_course-emoji{width:42px;height:42px}.dashboard-page_course-pct{margin-top:8px}.dashboard-page_browse-btn{justify-content:center;width:100%;display:inline-flex}}