:root{--bg-primary: #072140;--bg-card: #0E396E;--bg-elevated: #0b2d58;--accent: #3070B3;--accent-strong: #4a8bd3;--accent-soft: rgba(48, 112, 179, .18);--text-primary: #FFFFFF;--text-secondary: #C2D7EF;--text-muted: #6A757E;--border-subtle: rgba(227, 238, 250, .12);--border-strong: rgba(227, 238, 250, .22);--danger: #ff8a8a;--success: #8fe6b4;--max-width: 800px;--font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--glass-bg: rgba(14, 57, 110, .55);--glass-blur: 14px;--shadow-glow: 0 20px 60px rgba(7, 33, 64, .55);--transition: .2s ease}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--bg-primary)}body{margin:0;min-height:100vh;font-family:var(--font-stack);color:var(--text-primary);background:radial-gradient(1200px 600px at 20% -10%,rgba(48,112,179,.25),transparent 60%),radial-gradient(900px 500px at 110% 10%,rgba(48,112,179,.18),transparent 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var(--border-subtle);border-radius:var(--radius-lg);padding:clamp(22px,4vw,36px);box-shadow:var(--shadow-glow)}.hero{text-align:center;padding-top:clamp(24px,6vw,64px)}.hero-badge{display:inline-block;padding:6px 12px;border:1px solid var(--border-strong);border-radius:999px;color:var(--text-secondary);font-size:13px;letter-spacing:.08em;text-transform:uppercase;background:#3070b326;margin-bottom:24px}.hero-headline{font-size:clamp(32px,6vw,56px);line-height:1.1;font-weight:700;letter-spacing:-.02em;margin:0 0 20px;color:var(--text-primary)}.hero-strike{text-decoration:line-through;text-decoration-thickness:3px;text-decoration-color:#c2d7ef99;color:var(--text-secondary);opacity:.7;font-weight:600}.hero-highlight{color:var(--text-primary);background:linear-gradient(180deg,#fff,#c2d7ef);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero-sub{color:var(--text-secondary);font-size:clamp(16px,2.2vw,19px);max-width:560px;margin:0 auto 28px}.hero-ctas{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:inherit;font-weight:600;font-size:15px;padding:12px 22px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;text-decoration:none;transition:background var(--transition),transform var(--transition),border-color var(--transition),box-shadow var(--transition),color var(--transition);line-height:1;min-height:44px;white-space:nowrap}.btn:disabled{cursor:not-allowed;opacity:.55}.btn-primary{background:var(--accent);color:#fff;box-shadow:0 10px 30px -12px #3070b3cc}.btn-primary:not(:disabled):hover{background:var(--accent-strong);transform:translateY(-1px)}.btn-primary:not(:disabled):active{transform:translateY(0)}.btn-secondary{background:#e3eefa14;color:var(--text-primary);border-color:var(--border-strong)}.btn-secondary:not(:disabled):hover{background:#e3eefa24;border-color:var(--accent)}.btn-ghost{background:transparent;color:var(--text-secondary);border-color:var(--border-strong)}.btn-ghost:not(:disabled):hover{background:#e3eefa0f;color:var(--text-primary);border-color:var(--accent)}.features{display:flex;flex-direction:column;gap:20px}.features-heading{margin:0;font-size:clamp(20px,3vw,24px);letter-spacing:-.01em;color:var(--text-primary);text-align:center}.features-grid{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.feature-card{padding:22px;display:flex;flex-direction:column;gap:10px;transition:transform var(--transition),border-color var(--transition),box-shadow var(--transition)}.feature-card:hover{transform:translateY(-2px);border-color:var(--border-strong);box-shadow:0 20px 50px -20px #3070b380}.feature-title{margin:0;font-size:16px;color:var(--text-primary);letter-spacing:-.005em}.feature-body{margin:0;font-size:14px;line-height:1.6;color:var(--text-secondary)}.feature-tag{align-self:flex-start;margin-top:4px;max-width:100%;display:inline-block;font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-strong);background:#3070b326;border:1px solid rgba(48,112,179,.35);padding:5px 10px;border-radius:999px;white-space:nowrap}@media (max-width: 720px){.features-grid{grid-template-columns:1fr}}.form-section{scroll-margin-top:32px}.form-header h2{margin:0 0 6px;font-size:24px;letter-spacing:-.01em}.form-sub{margin:0 0 24px;color:var(--text-secondary);font-size:15px}.form-fieldset{border:0;padding:0;margin:0;display:flex;flex-direction:column;gap:20px}.field{display:flex;flex-direction:column;gap:8px}.field-label{font-size:13px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--text-secondary)}.field-input{font:inherit;width:100%;padding:12px 14px;border-radius:var(--radius-sm);background:#0721408c;border:1px solid var(--border-strong);color:var(--text-primary);transition:border-color var(--transition),background var(--transition),box-shadow var(--transition)}.field-input::placeholder{color:var(--text-muted)}.field-input:focus{outline:none;border-color:var(--accent);background:#072140cc;box-shadow:0 0 0 3px var(--accent-soft)}.field-input.has-error{border-color:var(--danger)}.field-input:disabled{opacity:.6;cursor:not-allowed}.field-error{color:var(--danger);font-size:13px;margin:0}.field-hint{color:var(--text-muted);font-size:13px;margin:0}.course-list{list-style:none;padding:6px;margin:0;display:flex;flex-direction:column;gap:4px;max-height:240px;overflow-y:auto;overscroll-behavior:contain;background:#07214073;border:1px solid var(--border-subtle);border-radius:var(--radius-md)}.course-list-empty{margin:0;padding:20px;text-align:center;color:var(--text-muted);background:#07214073;border:1px solid var(--border-subtle);border-radius:var(--radius-md);font-size:14px}.course-row{border-radius:var(--radius-sm)}.course-row:hover{background:#3070b31a}.course-row.is-subscribed{background:#3070b314}.course-row-label{display:flex;align-items:center;gap:12px;padding:10px 12px;cursor:pointer}.course-row-label 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var(--transition)}.modal-close:hover{background:#e3eefa1a;color:var(--text-primary)}.modal-body{padding:22px;overflow-y:auto}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:16px}.feedback-message{margin:0;font-size:15px;line-height:1.55;color:var(--text-secondary)}.feedback-success{color:var(--success)}.feedback-error{color:var(--danger)}.feedback-info{color:var(--text-secondary)}.digest-frame-wrapper{background:#fff;border-radius:var(--radius-md);overflow:hidden;height:min(70vh,720px)}.digest-frame{width:100%;height:100%;border:0;background:#fbf9fa}@media (max-width: 640px){.hero-ctas .btn,.form-actions .btn{width:100%}}@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}