/* Reference: travis.bio — Archivo, IBM Plex Mono, charcoal surfaces and pale blue accents. */
:root {
  --color-bg: #151515;
  --color-surface: #1d1d1d;
  --color-line: #2d2d2d;
  --color-text: #edeff1;
  --color-muted: #a5a5a5;
  --color-accent: #8ec5f2;
  --color-accent-dim: rgba(142,197,242,.14);
  --color-transparent: transparent;
  --font-body: 'Archivo', system-ui, sans-serif;
  --font-label: 'IBM Plex Mono', monospace;
  --radius-card: 16px;
  --ease-out: cubic-bezier(.2,.8,.2,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:clip;scroll-padding-top:24px}
body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-body);font-size:16px;line-height:1.6;overflow-x:clip;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:2px solid var(--color-accent);outline-offset:6px}
::selection{background:var(--color-accent);color:var(--color-bg)}
.wrap{max-width:864px;margin:auto;padding:32px 32px 0}
.site-header{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-bottom:26px}
.brand{display:flex;gap:12px;align-items:center;font-size:17px;font-weight:900;letter-spacing:-.3px;white-space:nowrap}
.brand img{border-radius:50%;border:1px solid var(--color-line)}
.brand b{color:var(--color-accent)}
.bio-link{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--color-muted);white-space:nowrap}
.arrow{width:17px;height:17px;fill:currentColor;flex:none}
.bio-link:hover{color:var(--color-accent)}
.topics{display:flex;border-block:1px solid var(--color-line);gap:28px;padding:14px 0}
.topics a{font-size:14px;white-space:nowrap;color:var(--color-muted);padding:6px 0;position:relative}
.topics a:hover,.topics [aria-current]{color:var(--color-accent)}
.topics [aria-current]:after{content:'';position:absolute;bottom:-15px;left:0;right:0;height:2px;background:var(--color-accent)}
.hero{padding:58px 0 36px;max-width:700px}
.eyebrow{font-family:var(--font-label);font-size:11px;font-weight:400;letter-spacing:1.65px;color:var(--color-muted);margin:0;text-transform:uppercase;line-height:1.5}
.eyebrow>span{margin:0 12px;color:var(--color-accent)}
h1{font-size:clamp(38px,6vw,66px);line-height:1.03;letter-spacing:-1.8px;font-weight:900;margin:20px 0 25px;overflow-wrap:anywhere;min-width:0}
h1 em{font-style:normal;color:var(--color-accent)}
.how-to{display:block;font-size:22px;line-height:1.3;font-weight:600;letter-spacing:0;margin-bottom:12px;color:var(--color-text)}
.statement{font-size:23px;line-height:1.5;font-weight:500;max-width:660px;margin:0 0 19px;letter-spacing:-.3px}
.intro{font-size:16px;color:var(--color-muted);max-width:650px;line-height:1.75;margin:0}
.in-this-guide{padding:24px 0 36px;border-top:1px solid var(--color-line)}
.in-this-guide ol{padding:0;margin:16px 0 0;list-style:none;display:grid;gap:8px}
.in-this-guide a{display:flex;align-items:baseline;gap:16px;font-size:14px;color:var(--color-muted)}
.in-this-guide a span{font-family:var(--font-label);font-size:11px;color:var(--color-accent)}
.in-this-guide a:hover{color:var(--color-text)}
.principles{display:grid;gap:18px}
.principle{background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius-card);padding:29px 30px 30px;scroll-margin-top:24px}
.principle-heading{display:flex;gap:20px;align-items:baseline;margin-bottom:24px}
.number{color:var(--color-accent);font-family:var(--font-label);font-size:14px;flex:none}
h2{font-size:25px;font-weight:700;line-height:1.25;letter-spacing:-.45px;margin:0;overflow-wrap:anywhere;min-width:0}
.comparison{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:36px}
h3{font-family:var(--font-label);font-weight:400;font-size:11px;letter-spacing:1.2px;text-transform:uppercase;color:var(--color-accent);margin:0 0 13px}
.not h3{color:var(--color-muted)}
ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
li{font-size:15px;line-height:1.65}
.comparison li{position:relative;padding-left:14px}
.comparison li:before{content:'·';position:absolute;left:0;color:var(--color-accent)}
.not{border-left:1px solid var(--color-line);padding-left:28px;color:var(--color-muted)}
.not li:before{color:var(--color-muted)}
.next-guide{margin-top:44px;padding:25px 28px;display:flex;justify-content:space-between;align-items:center;gap:20px;border:1px solid var(--color-line);border-radius:var(--radius-card)}
.next-guide strong{display:block;font-size:23px;font-weight:600;margin-top:7px;white-space:nowrap}
.next-guide .arrow{color:var(--color-accent);width:23px;height:23px}
.next-guide:hover{border-color:var(--color-accent);background:var(--color-surface)}
.back-top{display:table;margin:28px auto 0;color:var(--color-muted);font-size:13px;white-space:nowrap}
.back-top:hover{color:var(--color-accent)}
footer{display:flex;justify-content:space-between;gap:18px;padding:40px 0;margin-top:36px;border-top:1px solid var(--color-line);font-family:var(--font-label);font-size:10px;letter-spacing:1px;color:var(--color-muted)}
footer a{white-space:nowrap}footer a:hover{color:var(--color-accent)}
.home-wrap{max-width:720px}
.home-hero{text-align:center;margin:auto;padding-top:48px;padding-bottom:42px}
.portrait{border-radius:50%;border:1px solid var(--color-line);display:block;margin:0 auto 26px}
.home-hero h1{font-size:70px;margin-top:18px;margin-bottom:22px}
.home-hero .statement{font-size:21px}
.home-hero .intro{max-width:475px;margin:auto}
.guide-list{display:grid;gap:18px}
.guide-card{display:block;padding:28px;background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius-card)}
.guide-card:hover{border-color:var(--color-accent)}
.guide-title{display:flex;justify-content:space-between;align-items:center;gap:22px;margin-top:18px}
.guide-title h2{font-size:29px;font-weight:800}.guide-title em{font-style:normal;color:var(--color-accent)}
.guide-title .arrow{color:var(--color-accent)}
.guide-card p{color:var(--color-muted);font-size:15px;max-width:490px;margin:13px 0 20px}
.read-guide{font-size:13px;color:var(--color-accent)}
.skip{position:fixed;top:10px;left:10px;background:var(--color-text);color:var(--color-bg);padding:10px;transform:translateY(-180%);z-index:5}.skip:focus{transform:translateY(0)}
@media(max-width:600px){.wrap{padding:22px 22px 0}.site-header{padding-bottom:20px}.brand{font-size:15px;gap:9px}.brand img{width:34px;height:34px}.bio-link{font-size:12px;gap:6px}.bio-link .arrow{width:13px;height:13px}.topics{justify-content:space-between;gap:12px}.topics a{font-size:13px}.hero{padding-top:40px}.statement{font-size:20px}.intro{font-size:15px}.principle{padding:23px 22px}.principle-heading{gap:13px;margin-bottom:24px}h2{font-size:23px}.comparison{grid-template-columns:minmax(0,1fr);gap:23px}.not{border-left:none;border-top:1px solid var(--color-line);padding:20px 0 0}.next-guide{padding:22px}.next-guide strong{font-size:21px}footer{font-size:9px;letter-spacing:.5px}.home-hero h1{font-size:60px}.guide-card{padding:24px}.guide-title h2{font-size:26px}.in-this-guide a{font-size:13px;gap:12px}.in-this-guide li{line-height:1.5}}
@media(max-width:360px){.wrap{padding-inline:17px}.brand{font-size:13px}.topics a{font-size:12px}.principle{padding:21px 18px}.statement{font-size:19px}.home-hero h1{font-size:53px}.guide-title h2{font-size:24px}.bio-link{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{body{background:white;color:black}.topics,.in-this-guide,.bio-link,.next-guide,.back-top,.skip,footer{display:none}.wrap{padding:0;max-width:none}.hero{padding:20px 0}.principle{break-inside:avoid;background:none;border:1px solid #ccc}.principles{gap:12px}h1{font-size:36px}h1 em,.brand b,h3,.number{color:#235270}.statement{font-size:18px}.intro,.not,.eyebrow{color:#555}.comparison{grid-template-columns:1fr 1fr}.not{border-left:1px solid #ccc;border-top:none;padding:0 0 0 20px}}

/* Font Awesome Pro Regular, selected for each principle. */
.principle-heading{align-items:flex-start}
.principle-icon{width:27px;height:29px;flex:0 0 27px;fill:currentColor;color:var(--color-accent);margin-top:1px}
.hero{padding-bottom:40px}
@media(max-width:600px){.principle-icon{width:25px;height:27px;flex-basis:25px}.hero{padding-bottom:32px}}

/* Things to try: a button on each principle card that opens its two exercises in a dialog. */
.try{margin-top:26px;padding-top:22px;border-top:1px solid var(--color-line)}
.try-icon{width:13px;height:14px;flex:none}
.try-button{display:inline-flex;align-items:center;gap:10px;font:500 14px/1 var(--font-body);color:var(--color-accent);background:var(--color-accent-dim);border:1px solid rgba(142,197,242,.28);border-radius:999px;padding:11px 18px 11px 15px;cursor:pointer;transition:background .2s var(--ease-out),border-color .2s var(--ease-out)}
.try-button:hover{background:rgba(142,197,242,.22);border-color:var(--color-accent)}
.try-button:focus-visible,.try-close:focus-visible{outline:2px solid var(--color-accent);outline-offset:4px}
html.try-open{overflow:hidden}
.try-dialog{width:min(560px,calc(100vw - 32px));max-height:calc(100dvh - 32px);padding:0;overflow:auto;overscroll-behavior:contain;background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-line);border-radius:var(--radius-card);box-shadow:0 30px 80px rgba(0,0,0,.55)}
.try-dialog::backdrop{background:rgba(10,10,10,.72);backdrop-filter:blur(3px)}
.try-dialog[open]{animation:try-in .28s var(--ease-out)}
@keyframes try-in{from{opacity:0;transform:translateY(10px)}}
.try-panel{padding:26px 30px 32px}
.try-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:22px}
.try-label{display:flex;align-items:center;gap:9px;margin:0;font-family:var(--font-label);font-size:11px;letter-spacing:1.2px;text-transform:uppercase;color:var(--color-accent)}
.try-close{display:inline-flex;align-items:center;gap:8px;font:400 13px/1 var(--font-body);color:var(--color-muted);background:none;border:1px solid var(--color-line);border-radius:999px;padding:9px 13px 9px 15px;cursor:pointer}
.try-close:hover{color:var(--color-text);border-color:var(--color-muted)}
.try-close .try-icon{width:10px;height:13px}
.try-steps{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:20px}
.try-steps li{position:relative;padding-left:34px;font-size:16px;line-height:1.65}
/* Font Awesome Pro Regular check, drawn in the accent color. */
.try-steps li:before{content:'';position:absolute;left:0;top:6px;width:15px;height:15px;background:var(--color-accent);-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 448 512'%3E%3C!--! Font Awesome Pro 7.3.1 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license (Commercial License) Copyright 2026 Fonticons, Inc. --%3E%3Cpath d='M438 68.5c10.8 7.7 13.2 22.7 5.5 33.5l-264 368c-4.1 5.7-10.5 9.4-17.5 9.9S148 478 143 473L7 337c-9.4-9.4-9.4-24.6 0-33.9s24.6-9.4 33.9 0L157 419 404.5 74c7.7-10.8 22.7-13.2 33.5-5.5z'/%3E%3C/svg%3E") center/contain no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 448 512'%3E%3C!--! Font Awesome Pro 7.3.1 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license (Commercial License) Copyright 2026 Fonticons, Inc. --%3E%3Cpath d='M438 68.5c10.8 7.7 13.2 22.7 5.5 33.5l-264 368c-4.1 5.7-10.5 9.4-17.5 9.9S148 478 143 473L7 337c-9.4-9.4-9.4-24.6 0-33.9s24.6-9.4 33.9 0L157 419 404.5 74c7.7-10.8 22.7-13.2 33.5-5.5z'/%3E%3C/svg%3E") center/contain no-repeat}
@media(max-width:600px){.try{margin-top:22px;padding-top:20px}.try-panel{padding:22px 22px 26px}.try-steps li{font-size:15px;padding-left:31px}.try-steps li:before{top:5px}}
@media(prefers-reduced-motion:reduce){.try-dialog[open]{animation:none}.try-button{transition:none}}
@media print{.try,.try-dialog{display:none}}
.try-dialog h2{padding-bottom:20px;border-bottom:1px solid var(--color-line)}
.try-steps{gap:0}
.try-steps li+li{margin-top:20px;padding-top:20px;border-top:1px dotted #4a4a4a}
.try-steps li+li:before{top:26px}
@media(max-width:600px){.try-steps li+li:before{top:25px}}