:root{--primary:#221533;--secondary:#5235e4;--accent-secondary:#7056e8;--accent-rose:#ce3d72;--accent-plum:#7553a0;--text:#191522;--text-muted:#5e5669;--page:#f8f9fc;--surface:#fff;--line:#e6e1eb;--on-primary:#fff;--success:#177c54;--warning:#996200;--danger:#c02621;--shadow-color:#120a1d;--navy:var(--primary);--teal:var(--secondary);--cyan:var(--accent-secondary);--coral:var(--accent-rose);--ink:var(--text);--muted:var(--text-muted);--canvas:var(--page);--border:var(--line);--focus:var(--secondary);--primary-hover:color-mix(in srgb, var(--primary), var(--shadow-color) 22%);--secondary-hover:color-mix(in srgb, var(--secondary), var(--shadow-color) 16%);--primary-soft:color-mix(in srgb, var(--primary) 5%, var(--surface));--secondary-soft:color-mix(in srgb, var(--secondary) 6%, var(--surface));--secondary-tint:color-mix(in srgb, var(--secondary) 10%, var(--surface));--secondary-border:color-mix(in srgb, var(--secondary) 26%, var(--surface));--surface-muted:color-mix(in srgb, var(--text) 4%, var(--surface));--border-strong:color-mix(in srgb, var(--text) 24%, var(--surface));--text-subtle:color-mix(in srgb, var(--text-muted) 82%, var(--surface));--success-soft:color-mix(in srgb, var(--success) 8%, var(--surface));--success-border:color-mix(in srgb, var(--success) 28%, var(--surface));--success-text:color-mix(in srgb, var(--success) 85%, var(--shadow-color));--warning-soft:color-mix(in srgb, var(--warning) 9%, var(--surface));--warning-border:color-mix(in srgb, var(--warning) 32%, var(--surface));--warning-text:color-mix(in srgb, var(--warning) 85%, var(--shadow-color));--danger-soft:color-mix(in srgb, var(--danger) 6%, var(--surface));--danger-border:color-mix(in srgb, var(--danger) 24%, var(--surface));--danger-text:color-mix(in srgb, var(--danger) 85%, var(--shadow-color));--rose-soft:color-mix(in srgb, var(--accent-rose) 7%, var(--surface));--viewer-bg:color-mix(in srgb, var(--primary) 55%, var(--shadow-color));--viewer-canvas:color-mix(in srgb, var(--primary) 28%, var(--shadow-color));--viewer-panel:color-mix(in srgb, var(--primary) 75%, var(--shadow-color));--viewer-border:color-mix(in srgb, var(--primary) 60%, var(--on-primary));--on-dark-muted:color-mix(in srgb, var(--on-primary) 82%, var(--primary));--on-dark-subtle:color-mix(in srgb, var(--on-primary) 62%, var(--primary));--on-dark-accent:color-mix(in srgb, var(--accent-secondary) 32%, var(--on-primary));--on-dark-warning:color-mix(in srgb, var(--warning) 30%, var(--on-primary));--schematic-fill:color-mix(in srgb, var(--primary) 78%, var(--on-primary));--schematic-stroke:color-mix(in srgb, var(--primary) 48%, var(--on-primary));--radius-xs:6px;--radius-sm:10px;--radius-md:16px;--radius-lg:24px;--radius-xl:32px;--radius-pill:9999px;--shadow-xs:0 1px 2px color-mix(in srgb, var(--shadow-color) 4%, transparent);--shadow-sm:0 1px 3px color-mix(in srgb, var(--shadow-color) 4%, transparent), 0 2px 6px color-mix(in srgb, var(--shadow-color) 4%, transparent);--shadow-card:0 1px 3px color-mix(in srgb, var(--shadow-color) 4%, transparent), 0 6px 16px -2px color-mix(in srgb, var(--shadow-color) 6%, transparent), 0 14px 28px -4px color-mix(in srgb, var(--shadow-color) 7%, transparent);--shadow-card-hover:0 2px 6px color-mix(in srgb, var(--shadow-color) 5%, transparent), 0 12px 24px -4px color-mix(in srgb, var(--shadow-color) 9%, transparent), 0 24px 48px -8px color-mix(in srgb, var(--shadow-color) 11%, transparent);--shadow-overlay:0 4px 12px color-mix(in srgb, var(--shadow-color) 6%, transparent), 0 16px 36px -4px color-mix(in srgb, var(--shadow-color) 12%, transparent), 0 36px 72px -8px color-mix(in srgb, var(--shadow-color) 18%, transparent);--shadow-focus-ring:0 0 0 3px color-mix(in srgb, var(--secondary) 24%, transparent);--ease-standard:cubic-bezier(.2, 0, 0, 1);--ease-out:cubic-bezier(.16, 1, .3, 1);--ease-in-out:cubic-bezier(.4, 0, .2, 1);--ease-spring:cubic-bezier(.34, 1.56, .64, 1);--transition-fast:.16s var(--ease-out);--transition-normal:.24s var(--ease-out);--transition-slow:.36s var(--ease-out);--font-family:"DM Sans Variable", "DM Sans", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;font-family:var(--font-family);color:var(--ink);background:var(--canvas);font-synthesis:none}.brand-accent-violet{--course-accent:var(--secondary);--region-accent:var(--secondary);--accent:var(--secondary)}.brand-accent-orchid{--course-accent:var(--accent-secondary);--region-accent:var(--accent-secondary);--accent:var(--accent-secondary)}.brand-accent-rose{--course-accent:var(--accent-rose);--region-accent:var(--accent-rose);--accent:var(--accent-rose)}.brand-accent-plum{--course-accent:var(--accent-plum);--region-accent:var(--accent-plum);--accent:var(--accent-plum)}*{box-sizing:border-box}body{min-width:320px;margin:0}a{color:inherit}.container{width:min(100% - 40px,1280px);margin-inline:auto}.skip-link{background:var(--focus);color:var(--on-primary);z-index:20;padding:10px 16px;position:fixed;top:-60px;left:12px}.skip-link:focus{top:12px}.site-header{background:color-mix(in srgb, var(--surface) 92%, transparent);border-bottom:1px solid color-mix(in srgb, var(--surface) 80%, transparent);z-index:10;align-items:center;height:76px;display:flex;position:relative}.header-inner{justify-content:space-between;align-items:center;gap:24px;display:flex}.brand{letter-spacing:-.02em;align-items:center;gap:10px;font-weight:800;text-decoration:none;display:inline-flex}.brand span{background:var(--teal);width:34px;height:34px;color:var(--on-primary);border-radius:10px 10px 10px 3px;place-items:center;font-family:Georgia,serif;font-style:italic;display:grid}.header-inner nav{gap:32px;margin-left:auto;display:flex}.header-inner nav a{color:var(--text);font-size:.94rem;font-weight:650;text-decoration:none}.header-inner nav a:hover,.header-inner nav a:focus-visible,.text-link:hover{text-underline-offset:5px;text-decoration:underline}.button{background:var(--navy);color:var(--on-primary);border-radius:var(--radius-sm);box-shadow:0 5px 14px color-mix(in srgb, var(--shadow-color) 16%, transparent);justify-content:center;align-items:center;gap:18px;padding:15px 22px;font-weight:750;text-decoration:none;display:inline-flex}.button:hover{background:var(--primary-hover)}.button-ghost{color:var(--navy);border:1px solid var(--border);box-shadow:none;background:0 0}.button-secondary{background:var(--teal);margin-top:18px}.text-link{color:var(--navy);text-underline-offset:5px;font-weight:750}.hero{background:linear-gradient(120deg,var(--page) 45%,var(--secondary-soft));padding:88px 0 92px;overflow:hidden}.hero-grid{grid-template-columns:1.04fr .96fr;align-items:center;gap:70px;display:grid}.eyebrow{text-transform:uppercase;color:var(--teal);letter-spacing:.15em;margin:0 0 14px;font-size:.75rem;font-weight:850}.hero h1,.page-intro h1{letter-spacing:-.055em;max-width:780px;margin:0;font-size:clamp(3.1rem,6vw,5.8rem);line-height:.98}.hero h1 em{color:var(--teal);font-family:Georgia,serif;font-weight:400}.hero-actions{align-items:center;gap:26px;display:flex}.orbit{border:1px solid color-mix(in srgb, var(--accent-secondary) 20%, transparent);border-radius:50%;position:absolute}.line-b{width:122px;top:190px;left:36px;transform:rotate(-28deg)}.line-c{width:112px;top:272px;left:48px;transform:rotate(50deg)}.joint{background:var(--coral);border:5px solid var(--surface);width:18px;height:18px;box-shadow:0 3px 10px color-mix(in srgb, var(--shadow-color) 20%, transparent);z-index:2;border-radius:50%;position:absolute}.section{background:var(--surface);padding:92px 0}.section-heading{justify-content:space-between;align-items:end;margin-bottom:34px;display:flex}.section h2{letter-spacing:-.04em;margin:0;font-size:clamp(2rem,4vw,3.4rem);line-height:1.08}.learning-paths{background:var(--navy);color:var(--on-primary)}.learning-paths p{color:var(--on-dark-muted)}.learning-paths .eyebrow{color:var(--on-dark-accent)}.split{grid-template-columns:.9fr 1.1fr;align-items:center;gap:100px;display:grid}.page-intro>.container>p:not(.eyebrow){max-width:650px;font-size:1.15rem}.narrow{max-width:720px}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}@media (width<=900px){.hero-grid,.split{grid-template-columns:1fr}.split{gap:45px}}@media (width<=640px){.container{width:min(100% - 28px,1280px)}.site-header{height:auto;padding:14px 0}.header-inner{flex-wrap:wrap}.header-inner nav{border-top:1px solid var(--border);order:3;justify-content:space-between;gap:12px;width:100%;padding-top:12px}.hero{padding:58px 0}.hero-grid{gap:25px}.hero h1{font-size:3.15rem}.hero-actions{flex-direction:column;align-items:flex-start}.section{padding:64px 0}.section-heading{flex-direction:column;align-items:flex-start;gap:18px}.page-intro{padding:70px 0}}.header-actions{align-items:center;gap:10px;display:flex}.mobile-menu{display:none;position:relative}.mobile-menu summary{border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--navy);cursor:pointer;padding:10px 13px;font-weight:750;list-style:none}.mobile-menu summary::-webkit-details-marker{display:none}.header-inner .mobile-menu nav{order:initial;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);width:min(280px,100vw - 28px);box-shadow:var(--shadow-card);flex-direction:column;gap:2px;padding:10px;display:flex;position:absolute;top:calc(100% + 8px);right:0}.mobile-menu nav a{border-radius:6px;padding:11px 12px;text-decoration:none}.mobile-menu nav a:hover,.mobile-menu nav a:focus-visible{background:var(--canvas)}@media (width<=900px){.desktop-nav{display:none!important}.mobile-menu{display:block}.site-header{height:76px}.header-inner{flex-wrap:nowrap!important}.header-inner .header-actions{margin-left:auto}}@media (width<=420px){.brand{font-size:.92rem}.brand span{width:31px;height:31px}.header-actions .button{padding:9px 11px}.mobile-menu summary{padding:9px 10px}}.breadcrumbs{color:var(--muted);white-space:nowrap;align-items:center;gap:10px;margin-bottom:38px;font-size:.82rem;display:flex;overflow:hidden}.breadcrumbs a{color:var(--navy);text-underline-offset:3px}.breadcrumbs span:last-child{text-overflow:ellipsis;overflow:hidden}.catalogue-intro.compact{padding-bottom:65px}.catalogue-intro h1,.course-hero h1,.region-hero h1{letter-spacing:-.055em;margin:0;font-size:clamp(3rem,6vw,5.5rem);line-height:1}.catalogue-intro h1 em{color:var(--teal);font-family:Georgia,serif;font-weight:400}.catalogue-intro>.container>p:last-child,.region-hero-grid>div>p,.course-hero-grid>div>p{max-width:650px;font-size:1.1rem}.course-card{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);box-shadow:0 4px 14px color-mix(in srgb, var(--shadow-color) 5%, transparent);flex-direction:column;display:flex;overflow:hidden}.course-card-body{flex-direction:column;flex:1;padding:22px;display:flex}.course-meta{text-transform:uppercase;letter-spacing:.08em;color:var(--muted);justify-content:space-between;align-items:center;gap:12px;font-size:.72rem;font-weight:850;display:flex}.access-badge{text-transform:uppercase;letter-spacing:.06em;border-radius:999px;align-items:center;width:max-content;padding:5px 9px;font-size:.67rem;font-weight:850;display:inline-flex}.access-badge.free{background:var(--success-soft);color:var(--success-text)}.access-badge.premium{background:var(--warning-soft);color:var(--warning-text)}.course-card h3{letter-spacing:-.025em;margin:18px 0 8px;font-size:1.35rem;line-height:1.18}.course-card h3 a{text-decoration:none}.course-card h3 a:after{content:"";position:absolute;inset:0}.course-card{position:relative}.course-card p{margin:0 0 20px;font-size:.9rem}.course-facts{color:var(--muted);flex-wrap:wrap;gap:12px;margin-top:auto;font-size:.73rem;display:flex}.course-facts span+span:before{content:"•";color:var(--course-accent);margin-right:12px}.empty-state{border:1px dashed var(--border);border-radius:var(--radius-md);text-align:center;background:var(--canvas);padding:60px 20px}.empty-state b{font-size:1.2rem}.empty-state p{margin:8px auto 20px}.empty-state button{background:var(--navy);color:var(--on-primary);border-radius:var(--radius-sm);cursor:pointer;border:0;padding:12px 18px;font-weight:750}.demo-notice{background:var(--secondary-soft);border-top:1px solid var(--border);padding:28px 0}.demo-notice .container{align-items:center;gap:24px;display:flex}.demo-notice b{white-space:nowrap;color:var(--navy)}.demo-notice p{margin:0;font-size:.85rem}.course-hero{background:linear-gradient(130deg,color-mix(in srgb,var(--course-accent),var(--surface) 90%),var(--page));padding:54px 0 85px}.course-hero-grid{grid-template-columns:1.15fr .85fr;align-items:center;gap:80px;display:grid}.hero-meta{justify-content:flex-start;margin-bottom:20px}.hero-meta>a{color:var(--course-accent);font-weight:850}.course-content h2,.syllabus h2{letter-spacing:-.04em;margin:0;font-size:clamp(2rem,4vw,3.2rem)}.review-note{border:1px solid var(--danger-border);border-left:4px solid var(--coral);border-radius:var(--radius-sm);background:var(--danger-soft);align-self:start;padding:22px}.review-note b{color:var(--danger-text)}.review-note p{margin-bottom:0;font-size:.86rem}.syllabus-duration{color:var(--muted);font-size:.85rem}.region-hero{background:linear-gradient(140deg,color-mix(in srgb,var(--region-accent),var(--surface) 90%),var(--page));padding:54px 0 88px}.region-hero-grid{grid-template-columns:1.2fr .8fr;align-items:center;gap:70px;display:grid}.region-hero .eyebrow{color:var(--region-accent)}.region-hero .text-link{margin-top:18px;display:inline-block}.region-mark{place-items:center;display:grid}.region-mark span{background:color-mix(in srgb,var(--region-accent),var(--surface) 80%);width:260px;height:260px;color:var(--region-accent);box-shadow:inset 0 0 0 28px color-mix(in srgb, var(--on-primary) 48%, transparent);border-radius:50% 45% 55% 48%;place-items:center;font:italic 6rem Georgia,serif;display:grid}@media (width<=900px){.course-grid{grid-template-columns:repeat(2,1fr)}.course-hero-grid,.region-hero-grid{grid-template-columns:1fr}}@media (width<=640px){.catalogue-intro{padding:32px 0 55px}.breadcrumbs{margin-bottom:28px}.course-grid{grid-template-columns:1fr}.demo-notice .container{flex-direction:column;align-items:flex-start;gap:4px}.course-hero,.region-hero{padding:32px 0 62px}.region-mark{display:none}}.classroom-container{background:var(--canvas);grid-template-columns:320px 1fr;min-height:calc(100vh - 76px);display:grid}.classroom-sidebar{background:var(--surface);border-right:1px solid var(--border);max-height:calc(100vh - 76px);padding:24px 20px;position:sticky;top:76px;overflow-y:auto}.classroom-main{width:100%;max-width:960px;margin-inline:auto;padding:32px 40px}.media-tabs{border-bottom:2px solid var(--border);gap:8px;margin-bottom:16px;padding-bottom:12px;display:flex}.tab-btn{border-radius:var(--radius-sm);background:var(--canvas);color:var(--muted);cursor:pointer;border:1px solid #0000;padding:8px 16px;font-size:.875rem;font-weight:600;transition:all .12s}.tab-btn.active{background:var(--navy);color:var(--on-primary)}.tab-btn:hover:not(.active){background:var(--surface-muted)}.pricing-grid{grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;display:grid}.pricing-card{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-card);flex-direction:column;padding:32px;display:flex;position:relative}.pricing-card.featured{border-color:var(--teal);box-shadow:0 12px 36px color-mix(in srgb, var(--accent-secondary) 15%, transparent)}.pricing-card .price{color:var(--navy);margin:16px 0 6px;font-size:2.6rem;font-weight:800}.pricing-card .price span{color:var(--muted);font-size:1rem;font-weight:500}.feature-list{flex-direction:column;gap:12px;margin:24px 0;padding:0;font-size:.9rem;list-style:none;display:flex}.feature-list li:before{content:"✓";color:var(--teal);margin-right:8px;font-weight:900}.auth-card{background:var(--surface);border-radius:var(--radius-md);border:1px solid var(--border);max-width:440px;box-shadow:var(--shadow-card);margin:40px auto;padding:36px}.form-group{flex-direction:column;gap:6px;margin-bottom:18px;display:flex}.form-group label{color:var(--navy);font-size:.82rem;font-weight:700}.form-group input{border:1px solid var(--border);border-radius:var(--radius-sm);font:inherit;padding:12px 14px;font-size:.95rem}.form-group input:focus{border-color:var(--focus);outline:none}.admin-table{border-collapse:collapse;background:var(--surface);border-radius:var(--radius-md);border:1px solid var(--border);width:100%;margin-top:20px;overflow:hidden}.admin-table th{background:var(--canvas);text-align:left;text-transform:uppercase;letter-spacing:.06em;color:var(--navy);border-bottom:1px solid var(--border);padding:12px 16px;font-size:.75rem}.admin-table td{border-bottom:1px solid var(--border);padding:14px 16px;font-size:.875rem}@media (width<=900px){.classroom-container{grid-template-columns:1fr}.classroom-sidebar{border-right:none;border-bottom:1px solid var(--border);max-height:none;position:relative;top:0}.pricing-grid{grid-template-columns:1fr}.classroom-main{padding:24px 16px}}.header-actions>.button{white-space:nowrap}.course-meta{flex-wrap:wrap;min-width:0}@media (width<=420px){.header-actions>.button{display:none}}.admin-shell{max-width:1440px;margin:auto;padding:42px 32px 80px}.admin-hero{justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:28px;display:flex}.admin-hero h1{color:var(--navy);letter-spacing:-.04em;margin:.15rem 0;font-size:clamp(2.2rem,5vw,3.6rem)}.admin-hero>div:first-child>p:last-child{max-width:760px;color:var(--muted);margin:.5rem 0}.database-pill{border:1px solid var(--success-border);background:var(--success-soft);color:var(--success-text);white-space:nowrap;border-radius:999px;align-items:center;gap:8px;padding:9px 13px;font-size:.78rem;font-weight:800;display:flex}.database-pill span{background:var(--success);width:8px;height:8px;box-shadow:0 0 0 4px var(--success-soft);border-radius:50%}.database-pill.offline{background:var(--warning-soft);border-color:var(--warning-border);color:var(--warning-text)}.database-pill.offline span{background:var(--warning);box-shadow:0 0 0 4px var(--warning-soft)}.admin-alert{border:1px solid var(--warning-border);background:var(--warning-soft);color:var(--warning-text);border-radius:10px;margin-bottom:24px;padding:16px 18px}.admin-stats{grid-template-columns:repeat(5,minmax(150px,1fr));gap:12px;margin:24px 0;display:grid}.admin-stats article{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-card);border-radius:12px;align-items:center;gap:12px;padding:18px;display:flex}.admin-stats article>span{color:var(--teal);font-size:1.8rem;font-weight:850}.admin-stats strong,.admin-stats small{display:block}.admin-stats small{color:var(--muted);margin-top:2px}.admin-workspace{background:var(--surface);border:1px solid var(--border);min-height:580px;box-shadow:0 18px 50px color-mix(in srgb, var(--shadow-color) 8%, transparent);border-radius:16px;grid-template-columns:280px 1fr;display:grid;overflow:hidden}.admin-nav{background:var(--page);border-right:1px solid var(--border);padding:18px}.admin-nav>p{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;padding:0 10px;font-size:.72rem;font-weight:800}.admin-nav button{text-align:left;width:100%;color:var(--navy);cursor:pointer;background:0 0;border:0;border-radius:9px;margin:5px 0;padding:13px 12px;display:block}.admin-nav button span,.admin-nav button small{display:block}.admin-nav button span{font-weight:800}.admin-nav button small{color:var(--muted);margin-top:4px;line-height:1.35}.admin-nav button.active{background:var(--surface);box-shadow:0 2px 12px color-mix(in srgb, var(--shadow-color) 8%, transparent);color:var(--teal)}.admin-panel{padding:28px}.admin-panel-head{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding-bottom:20px;display:flex}.admin-panel-head h2,.audit-panel h2{color:var(--navy);margin:.15rem 0}.content-list{padding-top:12px}.content-row{border:0;border-bottom:1px solid var(--line);background:var(--surface);text-align:left;cursor:pointer;border-radius:8px;grid-template-columns:42px 1fr auto;align-items:center;gap:14px;width:100%;padding:14px 10px;display:grid}.content-row strong,.content-row small{display:block}.content-row 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