:root{--green:#4caf50;--green-light:#66bb6a;--green-dark:#28752c;--lime:#b9e769;--bg:#0f1117;--bg2:#161b22;--bg3:#1e2530;--ink:#e8eaf0;--muted:#a8b0bc;--border:rgba(255,255,255,.1);--paper:#f7faf7;--paper-ink:#18301e;--radius:18px;--shadow:0 14px 45px rgba(0,0,0,.18)}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}a{color:inherit;text-decoration:none}.reading-width{width:min(760px,calc(100% - 40px));margin-inline:auto}.wide-width{width:min(1120px,calc(100% - 40px));margin-inline:auto}
.story-nav{position:sticky;top:0;z-index:10;background:rgba(15,17,23,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}.story-nav-inner{max-width:1120px;height:64px;margin:auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-weight:800;color:var(--green-light)}.back-link,.story-footer a{font-size:.88rem;color:var(--muted);transition:.2s}.back-link:hover,.story-footer a:hover{color:var(--green-light)}
.story-hero{min-height:650px;display:grid;place-items:center;position:relative;overflow:hidden;background:radial-gradient(circle at 78% 15%,rgba(102,187,106,.18),transparent 28%),linear-gradient(145deg,#08160b,#102817 55%,#0f1117)}.court-grid{position:absolute;inset:0;opacity:.13;background-image:linear-gradient(rgba(255,255,255,.35) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.35) 1px,transparent 1px);background-size:90px 90px;mask-image:linear-gradient(to bottom,black,transparent)}.hero-copy{text-align:center;position:relative;padding:90px 0}.eyebrow,.section-label{text-transform:uppercase;letter-spacing:.14em;font-weight:800;font-size:.75rem;color:var(--green-light);margin-bottom:12px}.hero-copy .eyebrow{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:22px}.hero-copy .eyebrow::before,.hero-copy .eyebrow::after{content:"";width:38px;height:1px;background:rgba(102,187,106,.55)}.hero-title{line-height:.98;letter-spacing:-.055em}.hero-title span{display:block}.hero-title .title-primary{color:#fff;font-size:clamp(2.5rem,5.6vw,4.6rem)}.hero-title .title-rally{margin-top:9px;color:var(--green-light);font-size:clamp(2.7rem,7vw,5.5rem);white-space:nowrap}.hero-title .title-ai{margin-top:18px;color:#fff;font-size:clamp(1.35rem,2.8vw,2.1rem);font-weight:600;letter-spacing:-.025em}.hero-title .title-ai em{color:var(--green-light);font-style:normal}.hero-subtitle{max-width:700px;margin:30px auto 35px;font-size:clamp(1.05rem,2vw,1.35rem);color:#c3cbd4}.hero-note{max-width:620px;margin:auto;display:flex;align-items:center;text-align:left;gap:16px;padding:18px 22px;background:rgba(255,255,255,.06);border:1px solid var(--border);border-radius:14px}.hero-note span{font-size:1.5rem}
.story-section{padding:100px 0}.alt-section{background:var(--bg2);border-block:1px solid rgba(255,255,255,.04)}.intro-section{background:var(--paper);color:var(--paper-ink)}.prose h2,.section-heading h2{font-size:clamp(2rem,4vw,3.25rem);line-height:1.12;letter-spacing:-.035em;margin-bottom:24px}.prose>p{margin-bottom:20px}.prose .lead{font-size:1.2rem}.prose blockquote{margin:32px 0;padding:24px 28px;border-left:4px solid var(--green);border-radius:0 12px 12px 0;background:#e7f3e8;font-size:1.25rem;font-weight:700}.origin-answer{font-size:1.18rem;padding-top:8px}.section-heading{text-align:center;max-width:760px;margin:0 auto 48px}.section-heading>p:last-child{color:var(--muted);font-size:1.05rem}.section-heading.light>p:last-child{color:#d4e8d6}
.timeline{list-style:none;position:relative;max-width:900px;margin:auto}.timeline::before{content:"";position:absolute;top:30px;bottom:30px;left:50%;width:2px;background:linear-gradient(var(--green),rgba(76,175,80,.15));transform:translateX(-50%)}.timeline li{display:grid;grid-template-columns:1fr 72px 1fr;align-items:center;margin:0 0 25px}.timeline li:nth-child(odd) .timeline-card{grid-column:1;grid-row:1}.timeline li:nth-child(even) .timeline-card{grid-column:3}.timeline-icon{grid-column:2;grid-row:1;width:50px;height:50px;margin:auto;border-radius:50%;display:grid;place-items:center;background:var(--green-dark);border:4px solid var(--bg2);font-size:1.15rem;z-index:1}.timeline-card{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.timeline-card span{color:var(--green-light);font-size:.72rem;font-weight:800;letter-spacing:.13em}.timeline-card h3{margin:3px 0 7px;font-size:1.05rem}.timeline-card p{color:var(--muted);font-size:.9rem}
.question-list,.responsibility-grid,.contribution-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.question-list div,.contribution-grid div{padding:18px;border-radius:12px;background:var(--bg2);border:1px solid var(--border);font-weight:600}.process-row{margin:46px 0 28px;display:flex;align-items:stretch;justify-content:center;gap:7px}.process-row span{display:grid;place-items:center;text-align:center;min-height:74px;padding:12px;background:rgba(76,175,80,.1);border:1px solid rgba(102,187,106,.3);border-radius:10px;font-size:.78rem;font-weight:700}.process-row i{align-self:center;color:var(--green-light);font-style:normal}.big-line{text-align:center;color:var(--green-light);font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800}.big-line.small{font-size:1.35rem;margin-top:38px}
.green-section{background:linear-gradient(145deg,#143d1a,#0d2712);border-block:1px solid rgba(102,187,106,.25)}.ai-flow{max-width:540px;margin:0 auto 48px;text-align:center}.ai-flow>div{padding:15px 22px;border-radius:12px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);font-weight:600}.ai-flow small{display:block;color:#bed2c0;margin-top:3px}.ai-flow b{display:block;color:var(--lime);font-size:1.3rem;line-height:1.5}.statement{max-width:850px;margin:0 auto 36px;text-align:center;font-size:clamp(1.5rem,4vw,2.5rem);font-weight:800;line-height:1.25;color:#fff}.responsibility-grid{max-width:900px;margin:auto}.responsibility-grid p{padding:14px 18px;border-radius:10px;background:rgba(0,0,0,.18);color:#d5e6d6}.responsibility-grid p::before{content:"✓";color:var(--lime);font-weight:800;margin-right:10px}
.phase-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.phase-card{padding:32px;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.phase-card.featured-phase{grid-column:1/-1;background:linear-gradient(135deg,var(--bg3),#142b18);border-color:rgba(102,187,106,.35)}.phase-number{display:inline-block;padding:5px 10px;border-radius:20px;background:rgba(76,175,80,.14);color:var(--green-light);text-transform:uppercase;letter-spacing:.1em;font-size:.7rem;font-weight:800}.phase-card h3{font-size:1.4rem;margin:14px 0 10px}.phase-card p,.phase-card li{color:var(--muted)}.phase-card ul{padding:15px 0 10px 20px}.phase-card li{margin:4px 0}.phase-quote{font-size:1.15rem!important;color:var(--ink)!important;font-weight:700}.phase-goal{margin-top:20px;padding:16px;border-radius:10px;background:rgba(76,175,80,.09)}.phase-goal strong{color:var(--green-light);margin-right:6px}.cue,.principle{display:inline-flex;margin:20px 8px 0 0;padding:10px 15px;border-radius:8px;background:rgba(102,187,106,.15);font-weight:800;text-transform:uppercase;letter-spacing:.04em;font-size:.83rem}.cue i{font-style:normal;color:var(--green-light);padding:0 7px}.principle{background:rgba(255,214,0,.09);color:#f2db70}
.path-comparison,.tool-cards{display:grid;grid-template-columns:1fr 1fr;gap:22px}.path-comparison article,.tool-cards article{padding:32px;background:var(--bg3);border-radius:var(--radius);border:1px solid var(--border)}.path-comparison h3{text-align:center;margin-bottom:22px}.path-comparison ol,.learning-compare ol{list-style:none;counter-reset:path}.path-comparison li,.learning-compare li{text-align:center;padding:10px;background:rgba(255,255,255,.035);border-radius:8px;margin-bottom:20px;position:relative}.path-comparison li:not(:last-child)::after,.learning-compare li:not(:last-child)::after{content:"↓";position:absolute;bottom:-20px;left:50%;color:var(--green-light)}.path-comparison .ai-path{border-color:rgba(102,187,106,.45)}.important-note{display:grid;grid-template-columns:230px 1fr;gap:24px;align-items:center;margin-top:28px;padding:28px;border-left:4px solid var(--green);background:rgba(76,175,80,.08);border-radius:0 12px 12px 0}.important-note strong{font-size:1.25rem}.important-note p{color:var(--muted)}
.learning-section{background:linear-gradient(180deg,#0f1117,#102216)}.question-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.question-cards div{min-height:130px;padding:22px;display:flex;align-items:flex-end;background:linear-gradient(145deg,var(--bg3),#18311c);border:1px solid rgba(102,187,106,.25);border-radius:14px;font-size:1.05rem;font-weight:700}.question-cards div::before{content:"?";align-self:flex-start;margin-right:auto;color:var(--green-light);font-size:2rem;line-height:1}.skills-line{max-width:850px;margin:38px auto 0;text-align:center;color:var(--muted);font-size:1.1rem}.skills-line strong{color:var(--ink)}.ethan-section h2{margin-bottom:22px}.contribution-grid{margin:32px 0}.contribution-grid div{background:rgba(76,175,80,.08);border-color:rgba(76,175,80,.2)}
.learning-compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}.learning-compare article{padding:34px;border-radius:var(--radius);background:var(--bg3);border:1px solid var(--border)}.compare-icon{text-align:center;font-size:2rem}.learning-compare h3{text-align:center;margin:8px 0 24px}.same-mindset{grid-column:1/-1;text-align:center;padding:30px;background:linear-gradient(110deg,#1c5926,#256d30);border-radius:var(--radius);position:relative}.same-mindset::before{content:"";position:absolute;top:-24px;left:25%;right:25%;height:24px;border-left:2px solid var(--green);border-right:2px solid var(--green)}.same-mindset h3{text-transform:uppercase;letter-spacing:.1em}.same-mindset div{display:flex;justify-content:center;gap:9px;flex-wrap:wrap}.same-mindset span{padding:7px 12px;border-radius:20px;background:rgba(0,0,0,.2);font-size:.82rem}
.debug-section{background:#111a14}.debug-process{max-width:520px;margin:auto;text-align:center}.debug-process span{display:block;padding:14px;background:var(--bg3);border:1px solid var(--border);border-radius:10px;text-transform:uppercase;letter-spacing:.08em;font-weight:700;font-size:.78rem}.debug-process b{display:block;color:var(--green-light);font-size:1.25rem}.debug-examples{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:45px}.debug-examples p{padding:18px;border-left:3px solid var(--green);background:rgba(255,255,255,.04);border-radius:0 10px 10px 0;color:var(--muted);font-size:.9rem}
.feature-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.feature-grid article{padding:22px;background:var(--bg3);border:1px solid var(--border);border-radius:14px;transition:transform .2s,border-color .2s}.feature-grid article:hover{transform:translateY(-3px);border-color:rgba(102,187,106,.45)}.feature-grid span{font-size:1.45rem}.feature-grid h3{font-size:.98rem;margin:11px 0 6px}.feature-grid p{font-size:.82rem;color:var(--muted)}
.tool-title{display:flex;align-items:center;gap:12px;margin-bottom:18px}.tool-title span{font-size:1.6rem}.tool-cards li{margin:8px 0 8px 20px;color:var(--muted)}.tool-cards article:first-child{border-top:3px solid #77aaff}.tool-cards article:last-child{border-top:3px solid var(--green-light)}.implementation-note{max-width:850px;margin:28px auto 0;padding:24px;text-align:center;background:rgba(76,175,80,.08);border-radius:12px;font-weight:600}
.closing-section{background:var(--paper);color:var(--paper-ink)}.tennis-lesson{margin:38px 0;padding:28px;background:#e2f1e4;border-radius:14px;border-left:5px solid var(--green)}.tennis-lesson p{margin-bottom:9px}.closing-line{margin:50px 0 10px!important;text-align:center;font-size:clamp(1.8rem,5vw,3rem);font-weight:800;color:var(--green-dark);line-height:1.15}.creator-line{text-align:center;color:#58705d;font-size:.9rem}.story-footer{min-height:110px;max-width:1120px;margin:auto;padding:30px 20px;display:flex;justify-content:space-between;align-items:center;color:var(--muted)}
@media(max-width:850px){.story-section{padding:75px 0}.timeline::before{left:25px}.timeline li{grid-template-columns:52px 1fr}.timeline li .timeline-icon{grid-column:1!important}.timeline li .timeline-card{grid-column:2!important;grid-row:1!important}.process-row{flex-direction:column;align-items:stretch}.process-row span{min-height:54px}.process-row i{transform:rotate(90deg)}.question-cards{grid-template-columns:repeat(2,1fr)}.feature-grid{grid-template-columns:repeat(2,1fr)}.debug-examples{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.story-nav-inner{height:58px}.brand{font-size:.92rem}.back-link{font-size:.78rem}.story-hero{min-height:580px}.hero-copy{padding:62px 0}.hero-copy .eyebrow{margin-bottom:18px}.hero-title .title-primary{font-size:clamp(2.15rem,11vw,3rem)}.hero-title .title-rally{font-size:clamp(2.35rem,12.5vw,3.6rem);letter-spacing:-.065em}.hero-title .title-ai{margin-top:14px}.hero-subtitle{margin-top:26px}.hero-note{align-items:flex-start}.story-section{padding:62px 0}.reading-width,.wide-width{width:min(100% - 30px,1120px)}.section-heading{margin-bottom:34px}.prose blockquote{padding:20px;font-size:1.08rem}.timeline-card{padding:19px}.question-list,.responsibility-grid,.contribution-grid,.phase-grid,.path-comparison,.tool-cards,.learning-compare,.question-cards,.debug-examples{grid-template-columns:1fr}.phase-card.featured-phase,.same-mindset{grid-column:1}.important-note{grid-template-columns:1fr}.question-cards div{min-height:95px}.same-mindset::before{display:none}.feature-grid{grid-template-columns:1fr}.cue,.principle{display:flex;margin-right:0;justify-content:center;text-align:center}.story-footer{flex-direction:column;gap:12px;text-align:center}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.feature-grid article{transition:none}}