@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@300;400;600;700&family=Lexend:wght@300;400;500;600;700&display=swap");.day28{--d28-bg:#ffffff;--d28-bg-alt:#f5f6f8;--d28-surface1:#f5f6f8;--d28-surface2:#ecedf2;--d28-card:#ffffff;--d28-card-tint:#f5f6f8;--d28-border:#d4d5de;--d28-border-light:#e0e1ea;--d28-accent:#6366f1;--d28-accent-light:#818cf8;--d28-accent-dim:rgba(99,102,241,0.08);--d28-accent-mid:rgba(99,102,241,0.15);--d28-green:#10b981;--d28-green-dim:rgba(16,185,129,0.10);--d28-red:#ef4444;--d28-red-dim:rgba(239,68,68,0.10);--d28-text:#0f0f1a;--d28-text-muted:#6b6b7b;--d28-font-display:"Lexend",sans-serif;--d28-font-body:"IBM Plex Sans",sans-serif;--d28-font-mono:"IBM Plex Mono",monospace;--d28-radius-sm:2px;--d28-radius-md:4px;--d28-radius-lg:6px;--d28-transition:0.18s ease;position:relative;background:var(--d28-bg);color:var(--d28-text);font-family:var(--d28-font-body);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased;min-height:calc(100vh - 57px)}:is(.dark) .day28{--d28-bg:#0a0a14;--d28-bg-alt:#111120;--d28-surface1:#111120;--d28-surface2:#181826;--d28-card:#1e1e2e;--d28-card-tint:#242436;--d28-border:#252540;--d28-border-light:#333348;--d28-accent:#8182C1;--d28-accent-light:#A3A4D8;--d28-accent-dim:rgba(129,130,193,0.10);--d28-accent-mid:rgba(129,130,193,0.18);--d28-green:#34d399;--d28-green-dim:rgba(52,211,153,0.10);--d28-red:#f87171;--d28-red-dim:rgba(248,113,113,0.10);--d28-text:#f0edee;--d28-text-muted:#7a7580}.day28 .d28-nav{position:sticky;top:66px;z-index:100;background:rgba(255,255,255,.88);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--d28-border);padding:0 32px;height:56px;display:flex;align-items:center;justify-content:space-between}:is(.dark) .day28 .d28-nav{background:rgba(10,10,20,.88)}.day28 .d28-nav-brand{font-family:var(--d28-font-display);font-weight:700;font-size:15px;color:var(--d28-text);letter-spacing:-.3px}.day28 .d28-nav-brand span{color:var(--d28-accent)}.day28 .d28-nav-label{font-family:var(--d28-font-mono);font-size:11px;font-weight:500;text-transform:uppercase;letter-spacing:.12em;color:var(--d28-text-muted)}.day28 .d28-hero{position:relative;overflow:hidden;padding:72px 32px 56px;border-bottom:1px solid var(--d28-border);background:var(--d28-bg)}.day28 .d28-hero-grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(99,102,241,.05) 1px,transparent 0),linear-gradient(90deg,rgba(99,102,241,.05) 1px,transparent 0);background-size:48px 48px;pointer-events:none}:is(.dark) .day28 .d28-hero-grid-bg{background-image:linear-gradient(rgba(129,130,193,.04) 1px,transparent 0),linear-gradient(90deg,rgba(129,130,193,.04) 1px,transparent 0)}.day28 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auto}.day28 .d28-section-label{font-family:var(--d28-font-mono);font-size:11px;font-weight:500;color:var(--d28-text-muted);text-transform:uppercase;letter-spacing:.14em;margin-bottom:20px}.day28 .d28-role-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.day28 .d28-role-card{position:relative;background:var(--d28-card);border:1px solid var(--d28-border);border-radius:var(--d28-radius-md);padding:20px 18px 18px;cursor:pointer;transition:all var(--d28-transition);text-align:left}.day28 .d28-role-card:after,.day28 .d28-role-card:before{content:"";position:absolute;width:12px;height:12px;pointer-events:none;transition:border-color var(--d28-transition),opacity var(--d28-transition);opacity:0}.day28 .d28-role-card:before{top:5px;left:5px;border-top:1.5px solid var(--d28-accent);border-left:1.5px solid var(--d28-accent)}.day28 .d28-role-card:after{bottom:5px;right:5px;border-bottom:1.5px solid var(--d28-accent);border-right:1.5px solid var(--d28-accent)}.day28 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.d28-sticky-pill.d28-active{background:var(--d28-accent);border-color:var(--d28-accent);color:#fff}.day28 .d28-detail-section{max-width:1100px;margin:0 auto;padding:48px 32px 0}.day28 .d28-detail-header{margin-bottom:40px}.day28 .d28-detail-icon{font-family:var(--d28-font-mono);font-size:28px;color:var(--d28-accent);margin-bottom:12px}.day28 .d28-detail-title{font-family:var(--d28-font-display);font-size:32px;font-weight:700;color:var(--d28-text);letter-spacing:-.4px;margin-bottom:6px}.day28 .d28-detail-pain{font-size:16px;font-weight:400;color:var(--d28-text-muted);line-height:1.6;max-width:640px}.day28 .d28-detail-pain em{color:var(--d28-accent);font-style:normal;font-weight:600}.day28 .d28-ba-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:48px}.day28 .d28-ba-col{background:var(--d28-card);border:1px solid var(--d28-border);border-radius:var(--d28-radius-md);padding:24px 22px}.day28 .d28-ba-col--before{border-left:3px solid var(--d28-red)}.day28 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.d28-usecases-label{font-family:var(--d28-font-mono);font-size:11px;font-weight:500;color:var(--d28-text-muted);text-transform:uppercase;letter-spacing:.14em;margin-bottom:16px}.day28 .d28-usecase-list{display:flex;flex-direction:column;gap:8px;margin-bottom:48px}.day28 .d28-usecase-item{background:var(--d28-card);border:1px solid var(--d28-border);border-radius:var(--d28-radius-md);overflow:hidden;transition:border-color var(--d28-transition)}.day28 .d28-usecase-item:hover{border-color:var(--d28-border-light)}.day28 .d28-usecase-item.d28-open{border-color:var(--d28-accent)}.day28 .d28-usecase-trigger{width:100%;background:none;border:none;padding:16px 20px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;text-align:left;gap:12px}.day28 .d28-usecase-num{font-family:var(--d28-font-mono);font-size:11px;font-weight:500;color:var(--d28-accent);background:var(--d28-accent-dim);border:1px solid var(--d28-accent-mid);border-radius:var(--d28-radius-sm);padding:2px 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16px;line-height:1.65;white-space:pre-wrap;word-break:break-word}:is(.dark) .day28 .d28-prompt-code{background:var(--d28-surface2)}.day28 .d28-panels-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px;margin-bottom:48px}.day28 .d28-panel{background:var(--d28-card);border:1px solid var(--d28-border);border-radius:var(--d28-radius-md);padding:20px}.day28 .d28-panel-title{font-family:var(--d28-font-mono);font-size:11px;font-weight:500;color:var(--d28-accent);text-transform:uppercase;letter-spacing:.12em;margin-bottom:14px}.day28 .d28-panel-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}.day28 .d28-panel-list li{font-size:13px;font-weight:300;color:var(--d28-text-muted);padding-left:16px;position:relative;line-height:1.45}.day28 .d28-panel-list li:before{content:"→";position:absolute;left:0;color:var(--d28-accent);font-size:11px;top:1px}.day28 .d28-stack-tags{display:flex;flex-wrap:wrap;gap:8px}.day28 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var(--d28-border);border-radius:var(--d28-radius-md);padding:22px}.day28 .d28-week-col--before{border-left:3px solid var(--d28-red)}.day28 .d28-week-col--after{border-left:3px solid var(--d28-green)}.day28 .d28-week-heading{font-family:var(--d28-font-display);font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;margin-bottom:14px}.day28 .d28-week-col--before .d28-week-heading{color:var(--d28-red)}.day28 .d28-week-col--after .d28-week-heading{color:var(--d28-green)}.day28 .d28-week-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}.day28 .d28-week-list li{font-size:13px;font-weight:300;color:var(--d28-text-muted);line-height:1.5;padding-left:20px;position:relative}.day28 .d28-week-col--before .d28-week-list li:before{content:"✕";position:absolute;left:0;color:var(--d28-red);font-size:10px;top:3px}.day28 .d28-week-col--after .d28-week-list 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.d30-btn-primary{font-family:var(--d30-lexend);font-weight:600;font-size:1rem;background:var(--d30-accent);color:#fff;border:none;padding:14px 40px;border-radius:var(--d30-radius-btn);cursor:pointer;letter-spacing:.02em;transition:all .2s ease;position:relative;overflow:hidden}.day30 .d30-btn-primary:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 4px 20px rgba(var(--d30-accent-rgb),.3)}.day30 .d30-btn-primary:active{transform:translateY(0)}.day30 .d30-btn-secondary{font-family:var(--d30-font);font-weight:500;font-size:.85rem;background:transparent;color:var(--d30-text-muted);border:1px solid var(--d30-border);padding:10px 24px;border-radius:var(--d30-radius-btn);cursor:pointer;transition:all .2s ease}.day30 .d30-btn-secondary:hover{border-color:var(--d30-accent);color:var(--d30-text)}.day30 .d30-btn-sm{padding:10px 28px;font-size:.88rem}.day30 .d30-quiz{padding:2rem 0 4rem;position:relative;z-index:1}.day30 .d30-progress-wrap{margin-bottom:2rem}.day30 .d30-progress-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.day30 .d30-progress-label{font-family:var(--d30-mono);font-size:.75rem;color:var(--d30-text-muted)}.day30 .d30-progress-cat{font-family:var(--d30-mono);font-size:.7rem;color:var(--d30-accent);background:rgba(var(--d30-accent-rgb),.1);padding:3px 8px;border-radius:var(--d30-radius-btn)}.day30 .d30-progress-bar{width:100%;height:4px;background:var(--d30-border);border-radius:2px;overflow:hidden}.day30 .d30-progress-fill{height:100%;background:var(--d30-accent);border-radius:2px;transition:width .4s ease}.day30 .d30-question-card{background:var(--d30-card);border:1px solid var(--d30-border);border-radius:var(--d30-radius-card);padding:2rem;margin-bottom:1.5rem;animation:d30fadeSlideUp .4s ease}@keyframes d30fadeSlideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.day30 .d30-q-number{font-family:var(--d30-mono);font-size:.7rem;color:var(--d30-text-muted);margin-bottom:1rem;letter-spacing:.05em}.day30 .d30-q-text{font-family:var(--d30-lexend);font-size:1.15rem;font-weight:600;line-height:1.5;margin-bottom:1.75rem;color:var(--d30-text)}.day30 .d30-options{display:flex;flex-direction:column;gap:10px}.day30 .d30-option{display:flex;align-items:center;gap:12px;background:var(--d30-bg-alt);border:1px solid var(--d30-border);border-radius:var(--d30-radius-btn);padding:14px 16px;cursor:pointer;transition:all .15s ease;font-size:.92rem;line-height:1.4}.day30 .d30-option:hover:not(.d30-locked){border-color:rgba(var(--d30-accent-rgb),.5);background:var(--d30-card-tint)}.day30 .d30-opt-key{font-family:var(--d30-mono);font-size:.75rem;font-weight:600;color:var(--d30-text-muted);width:24px;height:24px;display:flex;align-items:center;justify-content:center;border:1px solid var(--d30-border-light);border-radius:2px;flex-shrink:0;transition:all .15s ease}.day30 .d30-option:hover:not(.d30-locked) .d30-opt-key{border-color:var(--d30-accent);color:var(--d30-accent)}.day30 .d30-option.d30-correct{border-color:var(--d30-green);background:var(--d30-green-dim)}.day30 .d30-option.d30-correct .d30-opt-key{border-color:var(--d30-green);color:var(--d30-green);background:rgba(var(--d30-green-rgb),.15)}.day30 .d30-option.d30-wrong{border-color:var(--d30-red);background:var(--d30-red-dim)}.day30 .d30-option.d30-wrong .d30-opt-key{border-color:var(--d30-red);color:var(--d30-red);background:rgba(var(--d30-red-rgb),.15)}.day30 .d30-option.d30-locked{cursor:default;pointer-events:none}.day30 .d30-option.d30-dimmed{opacity:.35}.day30 .d30-explanation{margin-top:1.25rem;padding:1rem 1.25rem;background:var(--d30-bg);border-left:2px solid var(--d30-accent);border-radius:0 var(--d30-radius-btn) var(--d30-radius-btn) 0;font-size:.85rem;color:var(--d30-text-muted);line-height:1.6;animation:d30fadeIn .3s ease}@keyframes d30fadeIn{0%{opacity:0}to{opacity:1}}.day30 .d30-next-wrap{display:flex;justify-content:flex-end;margin-top:1.5rem;animation:d30fadeIn .3s ease}.day30 .d30-score-strip{display:flex;gap:3px;flex-wrap:wrap;margin-top:1rem}.day30 .d30-score-tick{width:18px;height:6px;background:var(--d30-border);border-radius:1px;transition:background .3s ease}.day30 .d30-score-tick.d30-hit{background:var(--d30-green)}.day30 .d30-score-tick.d30-miss{background:var(--d30-red)}.day30 .d30-results{padding:3rem 0 4rem;position:relative;z-index:1}.day30 .d30-results-hero{text-align:center;margin-bottom:3rem;animation:d30fadeSlideUp .5s ease}.day30 .d30-results-score{font-family:var(--d30-lexend);font-size:clamp(3.5rem,8vw,5rem);font-weight:800;color:var(--d30-accent);line-height:1;margin-bottom:.5rem}.day30 .d30-results-score span{font-size:2rem;color:var(--d30-text-muted);font-weight:400}.day30 .d30-results-level{font-family:var(--d30-lexend);font-size:1.5rem;font-weight:700;margin:1rem 0 .5rem}.day30 .d30-results-desc{font-size:1rem;color:var(--d30-text-muted);max-width:480px;margin:0 auto;line-height:1.6}.day30 .d30-stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-bottom:2.5rem}.day30 .d30-stat-card{background:var(--d30-card);border:1px solid var(--d30-border);border-radius:var(--d30-radius-card);padding:1.25rem;position:relative}.day30 .d30-stat-label{font-family:var(--d30-mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--d30-text-muted);margin-bottom:6px}.day30 .d30-stat-value{font-family:var(--d30-lexend);font-size:1.4rem;font-weight:700}.day30 .d30-stat-bar{margin-top:8px;height:3px;background:var(--d30-border);border-radius:2px;overflow:hidden}.day30 .d30-stat-bar-fill{height:100%;border-radius:2px;transition:width .8s ease}.day30 .d30-improve-section{margin-bottom:2.5rem}.day30 .d30-improve-title{font-family:var(--d30-lexend);font-size:1.1rem;font-weight:600;margin-bottom:1rem}.day30 .d30-improve-item{background:var(--d30-card);border:1px solid var(--d30-border);border-radius:var(--d30-radius-card);padding:1rem 1.25rem;margin-bottom:8px;font-size:.88rem;color:var(--d30-text-muted);line-height:1.5}.day30 .d30-improve-item strong{color:var(--d30-text)}.day30 .d30-review-section{margin-bottom:2.5rem}.day30 .d30-review-toggle{font-family:var(--d30-font);font-weight:500;font-size:.85rem;color:var(--d30-text-muted);background:transparent;border:1px solid var(--d30-border);padding:10px 20px;border-radius:var(--d30-radius-btn);cursor:pointer;transition:all .2s ease;margin-bottom:1rem;display:inline-block}.day30 .d30-review-toggle:hover{border-color:var(--d30-accent);color:var(--d30-text)}.day30 .d30-review-list{display:none}.day30 .d30-review-list.d30-visible{display:block}.day30 .d30-review-item{background:var(--d30-card);border:1px solid var(--d30-border);border-radius:var(--d30-radius-card);padding:1.25rem;margin-bottom:10px}.day30 .d30-review-q{font-size:.9rem;font-weight:600;margin-bottom:6px}.day30 .d30-review-your{font-size:.8rem;color:var(--d30-red);margin-bottom:4px}.day30 .d30-review-correct{font-size:.8rem;color:var(--d30-green);margin-bottom:6px}.day30 .d30-review-explain{font-size:.8rem;color:var(--d30-text-muted)}.day30 .d30-results-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:2rem}.day30 .d30-bonus{padding:0 0 5rem;position:relative;z-index:1}.day30 .d30-bonus-title{font-family:var(--d30-lexend);font-size:1.5rem;font-weight:700;text-align:center;margin-bottom:.5rem}.day30 .d30-bonus-sub{text-align:center;color:var(--d30-text-muted);font-size:.9rem;margin-bottom:2rem}.day30 .d30-takeaway-grid{display:grid;gap:10px}.day30 .d30-takeaway{background:var(--d30-card);border:1px solid var(--d30-border);border-radius:var(--d30-radius-card);padding:1.25rem 1.5rem;display:flex;gap:1rem;align-items:flex-start;position:relative}.day30 .d30-takeaway-num{font-family:var(--d30-mono);font-size:.7rem;font-weight:600;color:var(--d30-accent);background:rgba(var(--d30-accent-rgb),.1);width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:2px;flex-shrink:0}.day30 .d30-takeaway-text{font-size:.9rem;line-height:1.55}.day30 .d30-takeaway-text strong{color:var(--d30-text);display:block;margin-bottom:4px}.day30 .d30-takeaway-text span{color:var(--d30-text-muted)}.day30 .d30-newsletter{background:var(--d30-card);border:1px solid var(--d30-border);border-radius:var(--d30-radius-card);padding:1.5rem;margin:2rem 0;text-align:center}.day30 .d30-newsletter-title{font-family:var(--d30-lexend);font-size:1rem;font-weight:700;margin-bottom:.35rem}.day30 .d30-newsletter-sub{font-size:.82rem;color:var(--d30-text-muted);margin-bottom:1rem;line-height:1.5}.day30 .d30-newsletter-form{display:flex;gap:8px;max-width:440px;margin:0 auto}.day30 .d30-newsletter-input{flex:1;background:var(--d30-bg-alt);border:1px solid var(--d30-border);border-radius:var(--d30-radius-btn);padding:10px 14px;font-size:.88rem;font-family:var(--d30-font);color:var(--d30-text);outline:none;transition:border-color .2s}.day30 .d30-newsletter-input:focus{border-color:var(--d30-accent)}.day30 .d30-newsletter-input::placeholder{color:var(--d30-text-muted)}.day30 .d30-newsletter-btn{font-family:var(--d30-font);font-weight:600;font-size:.85rem;background:var(--d30-accent);color:#fff;border:none;padding:10px 20px;border-radius:var(--d30-radius-btn);cursor:pointer;transition:all .2s;white-space:nowrap}.day30 .d30-newsletter-btn:hover{opacity:.88}.day30 .d30-newsletter-btn:disabled{opacity:.55;cursor:not-allowed}.day30 .d30-newsletter-success{color:var(--d30-green);font-size:.88rem;margin-top:.5rem}.day30 .d30-newsletter-error{color:var(--d30-red);font-size:.82rem;margin-top:.5rem}.day30 .d30-footer{text-align:center;padding:2rem;font-family:var(--d30-mono);font-size:.7rem;color:var(--d30-text-muted);border-top:1px solid var(--d30-border);position:relative;z-index:1}@media (max-width:768px){.day30 .d30-nav{padding:0 1rem}.day30 .d30-container{padding:0 1.25rem}.day30 .d30-hero-meta{gap:1.25rem}.day30 .d30-stats-grid{grid-template-columns:1fr 1fr}.day30 .d30-results-actions{flex-direction:column;align-items:center}.day30 .d30-newsletter-form{flex-direction:column}}@media (max-width:480px){.day30 .d30-nav{padding:0 .75rem}.day30 .d30-nav-badge{display:none}.day30 .d30-container{padding:0 1rem}.day30 .d30-hero{padding:2.5rem 1rem}.day30 .d30-hero-meta{gap:1rem}.day30 .d30-question-card{padding:1.25rem}.day30 .d30-results-score{font-size:3rem}.day30 .d30-results-level{font-size:1.15rem}.day30 .d30-stats-grid{grid-template-columns:1fr}.day30 .d30-btn-primary{padding:12px 28px;font-size:.92rem}.day30 .d30-score-strip{gap:2px}.day30 .d30-score-tick{width:14px}}