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9px;font-size:.68rem;font-weight:800}.status-stable{background:var(--green-soft);color:var(--green)}.status-validated{color:#274d6b;background:#e6edf5}.status-failed{color:var(--red-dark);background:#fae6e6}.status-building{color:#82610e;background:#fff3d8}.release-error{color:#812026;white-space:pre-wrap;background:#fff3f3;border-radius:8px;grid-column:1/-1;max-height:140px;margin:0;padding:10px;font-size:11px;overflow:auto}.button.danger{color:var(--red-dark);border-color:#b7282e40}@media (max-width:980px){.admin-layout{grid-template-columns:1fr}.admin-sidebar{min-height:auto;position:static}.admin-sidebar nav{grid-template-columns:repeat(4,1fr)}.admin-logout{margin-top:0}.admin-stat-grid{grid-template-columns:repeat(2,1fr)}.admin-two-col{grid-template-columns:1fr}}@media (max-width:640px){.admin-page{padding-top:18px}.admin-stat-grid{grid-template-columns:1fr}.admin-topbar,.panel-title{flex-direction:column;align-items:stretch}.release-row{grid-template-columns:1fr}.admin-sidebar 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small{color:var(--muted);font-weight:500}.auth-switch{text-align:center;color:var(--muted);margin-top:18px}.auth-switch a{color:var(--red);font-weight:800}.form-error,.form-success{border-radius:12px;margin:14px 0;padding:12px 14px;font-size:.9rem}.form-error{color:#8b2426;background:#f8e5e3}.form-success{background:var(--green-soft);color:var(--green)}.compact-heading h1{font-size:clamp(2.7rem,5vw,4.5rem)}.course-catalog{gap:18px;margin-top:36px;display:grid}.course-card-large{background:var(--paper-strong);border:1px solid var(--line);border-radius:22px;grid-template-columns:74px 1fr auto;align-items:center;gap:24px;padding:26px;display:grid;box-shadow:0 10px 35px #0c1b2a0d}.course-card-large.recommended{border-color:#2d7a5b66;box-shadow:0 12px 40px #2d7a5b14}.license-badge{background:var(--navy-950);color:#fff;border-radius:20px;place-items:center;width:64px;height:64px;font-size:1.1rem;font-weight:900;display:grid}.course-card-large h2{margin:0;font-size:1.35rem}.course-card-large p{color:var(--muted);margin:7px 0 10px}.course-title-line,.course-meta{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.course-meta{color:var(--muted);gap:18px;font-size:.83rem}.module-stack{gap:34px;margin-top:44px;display:grid}.module-section{border-top:1px solid var(--line);background:#ffffff47;padding-top:24px}.module-heading{grid-template-columns:54px 1fr;align-items:start;gap:18px;margin-bottom:17px;display:grid}.module-heading>span{background:var(--navy-950);color:#fff;border-radius:16px;place-items:center;width:48px;height:48px;font-weight:850;display:grid}.module-heading h2{color:var(--navy-950);margin:0 0 4px}.module-heading p{color:var(--muted);margin:0}.lesson-list{gap:10px;margin-left:72px;display:grid}.lesson-row{background:var(--paper-strong);border:1px solid var(--line);border-radius:16px;grid-template-columns:38px 1fr auto;align-items:center;gap:16px;padding:17px 18px;transition:all .15s;display:grid}.lesson-row:hover{transform:translateY(-1px);box-shadow:0 10px 25px #0c1b2a0f}.lesson-index{width:34px;height:34px;color:var(--navy-800);background:#edf0eb;border-radius:50%;place-items:center;font-weight:850;display:grid}.lesson-row-main{gap:4px;display:grid}.lesson-row-main small{color:var(--muted)}.lesson-row-meta{color:var(--muted);white-space:nowrap;align-items:center;gap:14px;font-size:.8rem;display:flex}.lesson-row-meta b{color:var(--red)}.progress-track.mini{max-width:360px;height:4px;margin-top:6px}.muted-row{color:var(--muted);grid-template-columns:1fr}.lesson-page{padding-bottom:80px}.lesson-hero{background:var(--navy-950);color:#fff;padding:62px 0}.lesson-hero-grid{grid-template-columns:1fr .85fr;align-items:center;gap:54px;display:grid}.lesson-hero .eyebrow{color:#efb1b4;display:block}.lesson-hero h1{margin:8px 0 18px;font-family:Georgia,serif;font-size:clamp(2.8rem,5vw,4.7rem);font-weight:500;line-height:1}.lesson-hero p{color:#cad4dc;max-width:650px;font-size:1.06rem}.back-link{color:#cad4dc;margin-bottom:28px;font-size:.88rem;display:inline-block}.lesson-progress-inline{max-width:430px;margin-top:28px}.lesson-progress-inline .progress-track{background:#ffffff21}.lesson-progress-inline small{color:#b9c5ce;margin-top:7px;display:block}.lesson-image-wrap{background:#dce5df;border-radius:24px;overflow:hidden;box-shadow:0 30px 70px #0003}.lesson-image-wrap img{width:100%;height:auto;display:block}.lesson-layout{grid-template-columns:minmax(0,1fr) 290px;gap:54px;padding-top:54px;display:grid}.lesson-main{min-width:0}.lesson-prose{max-width:760px}.lesson-prose h2{color:var(--navy-950);margin:36px 0 12px;font-family:Georgia,serif;font-size:2rem;font-weight:500}.lesson-prose h3{margin:28px 0 10px}.lesson-prose p,.lesson-prose li{color:#45535e;font-size:1.03rem;line-height:1.75}.lesson-prose ul{padding-left:22px}.lesson-questions{margin-top:64px}.lesson-questions>h2{margin:0;font-family:Georgia,serif;font-size:2.4rem;font-weight:500}.lesson-question{background:var(--paper-strong);border:1px solid var(--line);border-radius:22px;margin-top:24px;padding:30px;position:relative}.question-number{color:#98a0a6;font-weight:850;position:absolute;top:22px;right:24px}.lesson-question h3{max-width:90%;margin:18px 0 20px;font-size:1.22rem}.question-scene{border:1px solid var(--line);border-radius:16px;width:100%;margin-bottom:18px}.answer-grid{gap:10px;display:grid}.answer-option{text-align:left;border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:14px;padding:15px 17px;transition:all .14s}.answer-option:hover:not(:disabled){border-color:var(--navy-800);transform:translate(2px)}.answer-option.selected-correct,.answer-option.correct-answer{background:#edf7f1;border-color:#62a789}.answer-option.selected-wrong{background:#fbefed;border-color:#ce7474}.feedback-panel{border-radius:16px;margin-top:18px;padding:20px}.feedback-panel.correct{background:var(--green-soft)}.feedback-panel.incorrect{background:#f8e8e4}.feedback-panel>strong{margin-bottom:8px;display:block}.feedback-panel p{margin:8px 0}.source-list{gap:8px;margin-top:17px;display:grid}.source-list a{background:#ffffffa6;border:1px solid #13293d1a;border-radius:12px;gap:2px;padding:12px 14px;display:grid}.source-list a span{color:var(--red);text-transform:uppercase;letter-spacing:.1em;font-size:.65rem;font-weight:850}.source-list a small{color:var(--muted)}.sticky-study-card{background:var(--paper-strong);border:1px solid var(--line);border-radius:20px;padding:24px;position:sticky;top:106px}.sticky-study-card ol{color:var(--muted);padding-left:20px;line-height:1.9}.friends-stack{grid-template-columns:.8fr 1.2fr;align-items:start;gap:18px;margin-top:36px;display:grid}.profile-card{background:var(--paper-strong);border:1px solid var(--line);border-radius:20px;padding:25px}.invite-card{background:var(--navy-950);color:#fff;grid-row:span 2}.invite-card h2{word-break:break-all;font-size:1.45rem}.invite-card p{color:#c6d0d7}.friend-form{gap:10px;display:flex}.friend-list{gap:8px;margin-top:18px;display:grid}.friend-row{border-top:1px solid var(--line);grid-template-columns:42px 1fr auto auto;align-items:center;gap:12px;padding:11px 0;display:grid}.friend-avatar{background:#e8ece8;border-radius:50%;place-items:center;width:40px;height:40px;font-weight:850;display:grid}.friend-row small{color:var(--muted);display:block}.text-button{cursor:pointer;font:inherit;background:0 0;border:0;font-size:.8rem}.danger-text{color:#a02d31}.service-status-list{gap:9px;margin-top:18px;display:grid}.service-status-row{border-top:1px solid var(--line);grid-template-columns:12px 1fr auto;align-items:center;gap:11px;padding:13px 0;display:grid}.service-status-row:first-child{border-top:0}.service-dot{background:#b05454;border-radius:50%;width:9px;height:9px}.service-dot.good{background:var(--green)}.service-status-row small{color:var(--muted);display:block}.service-health{color:var(--muted);text-transform:lowercase;font-size:.78rem}@media (max-width:900px){.course-card-large{grid-template-columns:64px 1fr}.course-card-large>.button{grid-column:1/-1}.lesson-hero-grid,.lesson-layout{grid-template-columns:1fr}.lesson-aside{display:none}.friends-stack{grid-template-columns:1fr}.invite-card{grid-row:auto}.lesson-list{margin-left:0}.lesson-row{grid-template-columns:38px 1fr}.lesson-row-meta{flex-wrap:wrap;grid-column:2}}@media (max-width:720px){.header-inner{grid-template-columns:1fr auto}.main-nav{order:3;grid-column:1/-1;justify-content:center;width:100%;padding-bottom:12px}.header-account .header-login-link{display:none}.course-card-large{grid-template-columns:1fr}.license-badge{width:54px;height:54px}.friend-form{flex-direction:column}.auth-card{padding:28px 22px}}