@layer reset,base,layout,components,states;@layer reset{*{box-sizing:border-box}body,h1,h2,h3,p{margin:0}button,input,select,textarea{font:inherit}button,a,input,summary,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}a{color:inherit}svg{display:block}button{touch-action:manipulation}[hidden]{display:none!important}}@layer base{:root{color-scheme:light;--paper:#f8f7f4;--surface:#ffffff;--ink:#242936;--muted:#596273;--line:#d8dde6;--green:#5147b8;--green-ink:#ffffff;--soft:#f0f1f7;--soft-2:#e9e6fa;--amber:#805412;--amber-bg:#fff3dd;--focus:#5147b8;--shadow:0 16px 52px -26px #173d3626;--radius:22px;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}:root[data-theme=night]{color-scheme:dark;--paper:#111319;--surface:#1b1e27;--ink:#f2f3f8;--muted:#b5bbca;--line:#383f4e;--green:#b0a6ff;--green-ink:#201b3e;--soft:#171a22;--soft-2:#2e294a;--amber:#f2c989;--amber-bg:#3c3023;--focus:#c2baff;--shadow:none}body{background:var(--paper);color:var(--ink);line-height:1.55;font-size:16px}a{text-underline-offset:4px}button{color:inherit}input,select,textarea{color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:10px;min-height:48px;padding:11px 12px;max-width:100%;font-size:16px}input:focus,select:focus,textarea:focus{border-color:var(--green)}:focus-visible{outline:3px solid var(--focus);outline-offset:4px}button{border:0;background:none}h1,h2,h3{line-height:1.18;letter-spacing:-.035em}h1{font-size:clamp(30px,4vw,48px);font-weight:720}h2{font-size:clamp(25px,3vw,34px);font-weight:700}h3{font-size:20px}p+p{margin-top:14px}strong{font-weight:680}.muted,.small{color:var(--muted)}.small{font-size:13px;line-height:1.5}.eyebrow{font-size:11px;letter-spacing:.15em;text-transform:uppercase;font-weight:750;color:var(--green)}.numeric{font-variant-numeric:tabular-nums}button,a{transition:background-color .14s ease,color .14s ease,border-color .14s ease}.skip{position:fixed;top:8px;left:8px;z-index:20;transform:translateY(-150%);background:var(--surface);padding:12px}.skip:focus{transform:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}html{scroll-padding-top:24px}::selection{background:var(--soft-2)}}@layer layout{.wrap{width:min(1120px,calc(100% - 64px));margin-inline:auto}.site-header{height:80px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.brand{display:flex;gap:10px;align-items:center;text-decoration:none;font-size:21px;font-weight:760;letter-spacing:-.045em;white-space:nowrap}.brand-mark{width:34px;height:34px;display:grid;place-items:center;border:1px solid var(--line);border-radius:11px;background:var(--surface);color:var(--green)}.header-right{display:flex;align-items:center;gap:28px}.header-nav{display:flex;gap:25px;font-size:13px;font-weight:600}.header-nav a{text-decoration:none}.hero{padding:42px 0 27px;position:relative}.hero .eyebrow{margin-bottom:12px}.hero p{margin-top:13px;color:var(--muted);font-size:17px}.hero-title{max-width:780px}.hero-note{display:flex;align-items:center;gap:8px;position:absolute;right:0;top:63px;font-size:12px;color:var(--muted)}.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--green)}.calculator-shell{display:grid;grid-template-columns:46% 54%;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);overflow:clip;align-items:stretch}.form-side{padding:28px 30px}.result-side{background:var(--soft);padding:30px 34px;border-left:1px solid var(--line);min-width:0}.content-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.below{padding:54px 0 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:24px}.section-head p{max-width:460px;color:var(--muted);font-size:14px}.section-head .eyebrow{margin-bottom:9px}.how{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding:30px 0;border-block:1px solid var(--line);margin-top:38px}.how-number{display:block;font-size:12px;font-weight:750;letter-spacing:.06em;color:var(--green);margin-bottom:10px}.how h3{font-size:17px;letter-spacing:-.02em;margin-bottom:8px}.how p{font-size:14px;color:var(--muted)}.article{max-width:760px;margin:48px auto 72px}.article h1{font-size:44px}.article .lede{font-size:20px;color:var(--muted);margin-top:20px}.article h2{margin:36px 0 14px;font-size:28px}.article h3{margin:24px 0 10px}.article ul,.article ol{padding-left:22px}.article li{margin:9px 0}.article .back{display:inline-block;font-size:13px;margin-bottom:26px;color:var(--muted)}.site-footer{border-top:1px solid var(--line);margin-top:60px;padding:30px 0 28px;display:flex;gap:35px;justify-content:space-between;color:var(--muted);font-size:12px}.footer-links{display:flex;flex-wrap:wrap;gap:12px 22px;max-width:560px}.footer-bottom{font-size:11px;color:var(--muted);padding-bottom:22px}.preview-note{font-size:11px;color:var(--muted);border-top:1px solid var(--line);padding:12px 0}.saved-card{border:1px solid var(--line);border-radius:16px;padding:20px 24px;background:var(--surface);margin-top:24px}.saved-card h3{font-size:18px}.saved-card p{font-size:14px;margin:10px 0}.saved-actions{display:flex;flex-wrap:wrap;gap:12px}.guide-card{border:1px solid var(--line);border-radius:18px;padding:25px;background:var(--surface);text-decoration:none;display:block}.guide-card h3{margin:14px 0 10px;font-size:23px}.guide-card p{font-size:14px;color:var(--muted)}.guide-card .arrow{margin-top:20px;display:block;color:var(--green);font-size:13px;font-weight:650}}@layer components{.theme{display:flex;align-items:center;border:1px solid var(--line);padding:3px;border-radius:24px;gap:1px}.theme button{font-size:11px;padding:5px 9px;min-height:32px;border-radius:20px;color:var(--muted)}.theme button[aria-pressed=true]{background:var(--ink);color:var(--paper)}.modes{display:flex;padding:4px;background:var(--paper);border-radius:12px;border:1px solid var(--line);gap:4px;margin-bottom:16px}.modes button{min-height:42px;flex:1;border-radius:8px;font-size:13px;font-weight:650;color:var(--muted)}.modes button[aria-pressed=true]{background:var(--green);color:var(--green-ink)}.mode-extra{display:flex;align-items:center;justify-content:space-between;font-size:12px;gap:8px;margin-bottom:17px}.text-button{color:var(--green);font-size:13px;font-weight:650;text-decoration:underline;text-underline-offset:4px;min-height:36px;padding:4px 0}.mode-extra button[aria-pressed=true]{text-decoration-thickness:2px}.field-label,label.field-label{display:block;font-weight:650;font-size:14px;margin-bottom:7px}.time-row{display:grid;grid-template-columns:1fr 44px 44px;align-items:center;gap:7px}.time-input{font-size:31px;letter-spacing:-.035em;font-weight:600;min-height:64px;width:100%;font-variant-numeric:tabular-nums;padding:8px 16px}.step{border:1px solid var(--line);border-radius:10px;min-width:44px;min-height:48px;font-size:22px;background:var(--surface)}.date-line{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:12px;color:var(--muted);margin:5px 0 10px}.date-line button{font-size:12px;color:var(--green);text-decoration:underline;min-height:30px;padding:2px}.hint{font-size:12px;color:var(--muted);margin-top:6px}.quick-times{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:18px}.chip{border:1px solid var(--line);border-radius:8px;padding:6px 10px;min-height:40px;font-size:12px;font-variant-numeric:tabular-nums;background:var(--surface);white-space:nowrap}.chip[aria-pressed=true]{background:var(--soft-2);border-color:var(--green);box-shadow:inset 0 0 0 1px var(--green);color:var(--ink);font-weight:700}.setting-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:9px 0}.setting-row .setting-name{font-size:12px;line-height:1.3;color:var(--muted);max-width:100px}.choices{display:flex;gap:5px;flex-wrap:wrap}.choices .chip{min-height:38px;padding:5px 9px}.custom-field{margin:10px 0;padding:12px;background:var(--paper);border-radius:10px}.custom-field input{width:100%}.custom-field label{font-size:12px}.advanced{border-top:1px solid var(--line);padding-top:11px;margin-top:16px}.advanced summary{cursor:pointer;font-size:12px;font-weight:650;min-height:34px;color:var(--muted);list-style:none;display:flex;align-items:center;justify-content:space-between}.advanced summary:after{content:"+";font-size:18px}.advanced[open] summary:after{content:"\2212"}.settings-body{padding:12px 0 4px}.settings-body>.field-group,.settings-body>fieldset{margin:12px 0 18px}.settings-body input:not([type=checkbox]):not([type=radio]),.settings-body select{width:100%;min-width:0}.settings-body label:not(.check){font-size:12px;font-weight:600}.settings-body .choices{margin-top:8px}.two-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px}.field-group{margin:12px 0}.check{display:flex;gap:9px;align-items:flex-start;font-size:12px;color:var(--muted);line-height:1.5}.check input{min-height:20px;width:19px;height:19px;padding:0;flex:none;accent-color:var(--green);margin:1px 0 0}.plain-fieldset{border:0;margin:0;padding:0;min-width:0}.plain-fieldset legend{padding:0;font-size:12px;font-weight:600}.primary{display:flex;align-items:center;justify-content:center;gap:14px;background:var(--green);color:var(--green-ink);border-radius:11px;padding:13px 18px;font-weight:650;font-size:14px;min-height:50px;width:100%}.submit{margin-top:17px}.privacy-mini{display:flex;align-items:center;justify-content:center;gap:6px;font-size:11px;color:var(--muted);margin:10px 0 0}.privacy-mini svg{width:12px;height:12px}.result-status{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:22px}.badge{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--surface);border-radius:20px;padding:4px 9px;font-size:10px;letter-spacing:.035em;font-weight:700;text-transform:uppercase}.result-zone{font-size:11px;color:var(--muted)}.result-label{font-size:14px;font-weight:500;color:var(--muted);letter-spacing:0;line-height:1.5}.result-time{font-size:clamp(44px,5vw,66px);font-weight:730;line-height:1.12;letter-spacing:-.055em;font-variant-numeric:tabular-nums;margin:6px 0 4px}.result-date{font-size:14px;margin-top:5px}.result-context{margin-top:20px;font-size:13px}.result-context b{font-size:17px}.timeline{margin:20px 0;border-block:1px solid var(--line);padding:17px 0;display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}.timeline .event{position:relative;padding-left:13px;border-left:2px solid var(--line)}.timeline .event:first-child{border-color:var(--green)}.timeline span{display:block;font-size:10px;letter-spacing:.015em;color:var(--muted);margin-bottom:5px}.timeline strong{font-size:17px;font-variant-numeric:tabular-nums}.timeline small{display:block;color:var(--muted);font-size:10px;margin-top:3px}.action-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:22px}.secondary{border:1px solid var(--line);border-radius:9px;background:var(--surface);padding:10px 12px;min-height:44px;font-size:12px;font-weight:650;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none}.secondary svg{width:15px;height:15px}.result-foot{display:flex;align-items:center;justify-content:space-between;margin-top:4px;gap:10px}.result-foot button{font-size:11px}.qualification{font-size:12px;color:var(--muted);line-height:1.6;margin-top:17px}.formula{font-size:12px;color:var(--muted);margin-top:18px;padding-top:15px;border-top:1px solid var(--line)}.formula h3{font-size:12px;letter-spacing:0;margin-bottom:7px}.notice{padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:12px;margin:14px 0;background:var(--surface)}.notice.warning{background:var(--amber-bg);color:var(--amber);border-color:currentColor}.notice button{display:block;margin-top:7px}.error{color:var(--amber);font-size:12px;margin:7px 0}.error-summary{border:1px solid var(--amber);padding:12px;border-radius:10px;background:var(--amber-bg);color:var(--amber);font-size:13px;margin-bottom:12px}.cycles{margin-top:23px;border-top:1px solid var(--line);padding-top:17px}.cycles summary{cursor:pointer;min-height:38px;font-size:12px;font-weight:650}.cycles .cycle-note{font-size:11px;color:var(--muted);margin:8px 0 14px}.cycle-card{border:1px solid var(--line);background:var(--surface);padding:12px;border-radius:10px;margin:8px 0;display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center}.cycle-card strong{font-size:17px;display:block}.cycle-card p{font-size:11px;color:var(--muted)}.cycle-card button{font-size:11px;max-width:118px}.short-cycles{margin-top:14px;font-size:12px}.short-cycles summary{font-size:11px}.reference-window{font-size:12px;color:var(--muted);margin-top:12px}.section-card{border:1px solid var(--line);border-radius:18px;background:var(--surface);padding:24px}.section-card h3{margin:12px 0;font-size:22px}.section-card p{font-size:14px;color:var(--muted)}.formula-static{font-size:14px;background:var(--soft);border-radius:10px;padding:15px;margin-top:18px;font-variant-numeric:tabular-nums}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:15px;background:var(--surface)}table{border-collapse:collapse;width:100%;font-size:13px;text-align:left;font-variant-numeric:tabular-nums}th{font-size:11px;color:var(--muted);font-weight:650;background:var(--soft);padding:15px 18px;line-height:1.5}td{border-top:1px solid var(--line);padding:11px 18px}th:nth-child(2),td:nth-child(2){background:var(--soft)}td:first-child{font-weight:650}td button{font-size:12px;color:var(--green);text-decoration:underline;min-height:34px}.table-caption{font-size:12px;color:var(--muted);margin:13px 0 0}.table-expander{display:block;margin:13px auto 0;font-size:13px;color:var(--green);min-height:44px}.faq{max-width:840px}.faq details{border-bottom:1px solid var(--line);padding:18px 0}.faq summary{cursor:pointer;min-height:32px;font-weight:600;font-size:15px;line-height:1.5;list-style:none;padding-right:28px;position:relative}.faq summary:after{content:"+";position:absolute;right:0;color:var(--green);font-size:22px;line-height:1.1}.faq details[open] summary:after{content:"\2212"}.faq details p{font-size:14px;color:var(--muted);margin-top:12px;max-width:740px}.sources-inline{font-size:12px;color:var(--muted);margin-top:20px}.source-list{font-size:13px}.source-list li{margin:12px 0}.back-cta{margin-top:28px;max-width:300px}.phase-diagram{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin:22px 0}.phase-diagram div{background:var(--soft);border-radius:12px;padding:17px 12px;font-size:12px;min-height:88px}.phase-diagram b{display:block;margin-bottom:8px;font-size:16px}.phase-diagram div:nth-child(2){background:var(--soft-2)}.phase-diagram div:nth-child(3){background:var(--green);color:var(--green-ink)}dialog{border:1px solid var(--line);border-radius:18px;background:var(--surface);color:var(--ink);width:min(480px,calc(100% - 32px));padding:26px;max-height:calc(100dvh - 40px);overflow:auto;box-shadow:0 25px 100px #0003}dialog::backdrop{background:#0c282b80}dialog h2{font-size:23px;margin-bottom:15px}dialog p{font-size:13px}dialog .dialog-actions{display:flex;gap:10px;margin-top:22px;justify-content:end}dialog .dialog-actions>*{width:auto}dialog textarea{width:100%;font-size:12px;line-height:1.6;min-height:230px;margin-top:15px}dialog label{font-size:13px}.calendar-summary{font-size:13px;padding:12px;border-radius:10px;background:var(--soft);margin-bottom:18px}#calendar-options .choices{margin:12px 0 20px}#print-plan{display:none}.ambiguous{border:1px solid var(--amber);border-radius:10px;padding:12px;font-size:12px;margin:10px 0}.ambiguous legend{font-weight:650;padding:0 4px}.ambiguous label{display:flex;gap:8px;align-items:center;margin:8px 0}.ambiguous input{min-height:20px;width:18px;height:18px;accent-color:var(--green)}.inline-status{font-size:12px;color:var(--green);min-height:20px;margin-top:10px}.now-reference{font-size:12px;color:var(--muted);padding:10px;background:var(--paper);border-radius:9px;margin-bottom:10px}.duration-end{margin-top:14px}.settings-recap{font-size:11px;color:var(--muted);margin:8px 0}.standalone-delete{color:var(--amber);font-size:12px;min-height:44px;text-decoration:underline}.empty-reference{font-size:12px;color:var(--muted)}.storage-error{font-size:12px;color:var(--amber);margin-top:18px}}@layer states{[aria-invalid=true]{border-color:var(--amber);box-shadow:0 0 0 1px var(--amber)}button:disabled{opacity:.48}#stale-note{background:var(--amber-bg);color:var(--amber);border-radius:9px;padding:10px 13px;font-size:12px;margin-bottom:15px}.result-side[data-state=stale] .result-time{color:var(--muted)}.no-js-only{font-size:13px;padding:18px;background:var(--amber-bg);color:var(--amber)}fieldset:disabled{opacity:.65}tr:target{outline:2px solid var(--green);outline-offset:-2px}dialog:focus{outline:none}}@media (min-width:1400px){.hero{padding-top:52px;padding-bottom:35px}.calculator-shell{grid-template-columns:46% 54%}.form-side{padding:30px 34px}.result-side{padding:32px 40px}}@media (max-width:980px){.wrap{width:calc(100% - 40px)}.hero-note{display:none}.header-right{gap:18px}.header-nav{gap:15px}.form-side{padding:23px}.result-side{padding:25px}.quick-times{gap:5px}.setting-row{flex-wrap:wrap;gap:7px}.setting-row .setting-name{max-width:none}.choices .chip{padding:5px 8px}}@media (max-width:700px){.wrap{width:calc(100% - 32px)}.site-header{height:58px}.brand{font-size:18px;gap:8px}.brand-mark{width:29px;height:29px;border-radius:9px}.brand-mark svg{width:19px;height:19px}.header-nav{display:none}.header-right{gap:0}.theme button{padding:4px 7px;font-size:10px;min-height:30px}.hero{padding:19px 0 18px}.hero .eyebrow{display:none}h1{font-size:30px;line-height:1.12;letter-spacing:-.04em}.hero p{font-size:13px;line-height:1.5;margin-top:9px}.calculator-shell{display:block;border-radius:17px}.form-side{padding:16px}.result-side{border-left:0;border-top:1px solid var(--line);padding:23px 20px}.modes{margin-bottom:8px;padding:3px;gap:3px}.modes button{min-height:38px;font-size:12px}.mode-extra{margin-bottom:9px;font-size:11px}.mode-extra button{font-size:11px;min-height:30px}.time-input{min-height:59px;font-size:30px}.time-row{gap:7px}.field-label{font-size:13px;margin-bottom:6px}.hint{font-size:11px;margin-top:4px}.date-line{font-size:11px;margin-bottom:7px;margin-top:3px;gap:4px}.quick-times{margin-bottom:12px;gap:7px}.chip{min-height:36px;padding:5px 10px}.setting-row{margin:7px 0;flex-wrap:nowrap}.setting-row .setting-name{font-size:11px;max-width:90px}.choices .chip{font-size:11px;min-height:36px;padding:5px 8px}.advanced{margin-top:10px;padding-top:7px}.advanced summary{min-height:30px;font-size:11px}.submit{margin-top:10px;min-height:48px;font-size:13px}.privacy-mini{font-size:10px;margin-top:8px}.result-status{margin-bottom:17px}.result-time{font-size:52px}.result-date{font-size:13px}.timeline{gap:8px}.timeline strong{font-size:17px}.timeline .event{padding-left:9px}.result-label{font-size:13px}.result-context{margin-top:17px}.below{padding-top:38px}.how{gap:20px;padding:24px 0;margin-top:28px}.how p{font-size:12px}.how h3{font-size:14px}.how-number{font-size:10px}.section-head{display:block;margin-bottom:19px}.section-head p{margin-top:12px;font-size:13px}.content-grid{grid-template-columns:1fr;gap:14px}.section-card{padding:22px}th,td{padding:10px 9px;font-size:11px}th{font-size:10px;min-width:70px}th:first-child{min-width:66px}th:last-child{min-width:70px}.table-wrap{border-radius:12px}td button{font-size:11px}.site-footer{display:block;margin-top:42px;padding-top:25px}.footer-links{margin-top:20px;gap:12px 18px}.article{margin:28px auto 50px}.article h1{font-size:34px}.article .lede{font-size:18px}.article h2{font-size:25px}.phase-diagram{grid-template-columns:1fr 1fr}.saved-card{padding:18px}.site-footer .brand{font-size:19px}}@media (max-width:359px){.brand{font-size:16px}.brand-mark{display:none}.hero h1{font-size:28px}.time-row{grid-template-columns:1fr 42px 42px;gap:5px}.choices{gap:4px}.choices .chip{font-size:10px;padding:5px 6px}.setting-row{flex-wrap:wrap}.how{grid-template-columns:1fr;gap:18px}.two-fields{grid-template-columns:1fr}.timeline{grid-template-columns:1fr;gap:13px}.timeline strong{display:inline}.timeline small{display:inline;margin-left:8px}.timeline span{margin-bottom:1px}}:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}:root{--control:#7b8496}:root[data-theme=night]{--control:#7f899e}input,select,textarea,.step,.chip,.secondary{border-color:var(--control)}.chip[aria-pressed=true]{border-color:var(--green)}@media (max-width:700px){.site-header{gap:8px}.hero{padding:16px 0 14px}.hero h1{font-size:28px;line-height:1.12}.hero p{font-size:12px;line-height:1.5;margin-top:7px}.mode-extra{margin:3px 0 9px;gap:8px}.mode-extra button{font-size:11px;min-height:36px}.choices .chip{min-height:44px;min-width:44px;padding:5px 7px}.setting-row .setting-name{flex:0 0 74px;max-width:74px}.setting-row .choices{flex-wrap:nowrap;gap:4px}.theme button{min-height:44px;min-width:39px;padding:4px 6px}.quick-times .chip{min-width:44px;min-height:44px}.advanced summary{min-height:40px}.time-row .step{min-height:48px}}@media (max-width:359px){.setting-row{flex-wrap:wrap}.setting-row .setting-name{flex-basis:auto;max-width:none}.theme button{min-width:38px}.hero h1{font-size:27px}}@media (max-width:700px){.hero{padding:12px 0 10px}.hero p{margin-top:5px}.modes{margin-bottom:5px}}@media (min-width:701px) and (max-width:959px){.calculator-shell{display:block}.result-side{border-left:0;border-top:1px solid var(--line)}.setting-row,.setting-row .choices{flex-wrap:nowrap}}@media (min-width:960px){.site-header{height:64px}.hero{padding:24px 0 20px}.hero .eyebrow{font-size:11px;line-height:1.4;margin-top:0;margin-bottom:10px}.form-side{padding:24px 30px}.mode-extra{margin-bottom:10px}.quick-times{margin-bottom:12px}.submit{margin-top:13px}.result-side{padding-top:24px;padding-bottom:24px}.result-status{margin-bottom:15px}.result-time{font-size:58px}.timeline{margin:16px 0;padding:14px 0}.action-grid{margin-top:17px}.formula{margin-top:14px;padding-top:12px}.cycles{margin-top:18px;padding-top:12px}}@media print{#print-plan h2{font-size:25pt;margin-bottom:20px}}:root{--green-hover:#12594f;--ease-out:cubic-bezier(.23,1,.32,1)}:root[data-theme=night]{--green-hover:#bce5d5}button{min-width:44px;min-height:44px}button,a{transition:background-color .14s ease,color .14s ease,border-color .14s ease}.theme button{font-size:14px;min-width:44px;min-height:44px;padding:6px}.modes{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;margin-bottom:16px}.modes button{min-width:0;min-height:58px;padding:6px 3px;font-size:14px;line-height:1.25;white-space:normal}.modes #now-button[aria-pressed=true]{background:var(--green);color:var(--green-ink)}.quick-times{margin:10px 0 6px;gap:8px}.quick-times .chip,.choices .chip{font-size:16px;min-width:44px;min-height:44px;padding:7px 10px}.setting-row{display:block;margin:16px 0}.setting-row .setting-name{display:block;max-width:none;max-height:none;font-size:16px;color:var(--ink);font-weight:600;margin-bottom:8px}.setting-row .choices{flex-wrap:wrap;gap:8px}.field-label,.custom-field label,.settings-body label:not(.check),.plain-fieldset legend{font-size:16px}.hero p,.section-head p,.how p,.guide-card p,.section-card p,.faq details p,.sources-inline,.source-list,.saved-card p{font-size:16px}.small,.hint,.date-line,.date-line button,.privacy-mini,.check,.badge,.result-zone,.timeline span,.timeline small,.qualification,.formula,.formula h3,.cycles .cycle-note,.reference-window,.table-caption,.inline-status,.now-reference,.settings-recap,.empty-reference,.storage-error,.cycle-card p{font-size:14px;line-height:1.55}.text-button,.secondary,.result-label,.result-date,.result-context,.result-foot button,.notice,.error,.error-summary,.advanced summary,.cycles summary,.faq summary,.short-cycles summary,dialog p,dialog label,dialog textarea,.calendar-summary{font-size:16px}.date-line button,.advanced summary,.cycles summary,.faq summary,.text-button{min-height:44px}.check{min-height:44px;align-items:center;padding-block:10px}.ambiguous label{min-height:44px;font-size:16px}.date-line{gap:4px 10px;margin:8px 0 12px}.result-status{align-items:start;flex-wrap:wrap;margin-bottom:16px}.result-zone{max-width:100%;overflow-wrap:anywhere}.result-message{font-size:30px;letter-spacing:-.025em}.result-context{margin-top:14px}.result-side{scroll-margin-top:16px}.cycles h3{font-size:18px;letter-spacing:-.02em;margin-bottom:8px}.cycle-card{display:block;position:relative;padding:14px}.cycle-card strong{font-size:22px}.cycle-card p+p{margin-top:4px}.cycle-card button{font-size:16px;max-width:none;margin-top:6px;text-align:left}.cycle-card.is-past{background:var(--paper);border-style:dashed}.cycle-card.is-past button{opacity:1;color:var(--muted);text-decoration:none}.table-wrap{position:relative;max-width:100%;min-width:0;overscroll-behavior-x:contain}table{min-width:610px;font-size:16px}th,td{font-size:16px;line-height:1.5;padding:12px 14px}th{font-size:14px}td button{font-size:16px;min-width:64px;min-height:44px}.footer-notes{flex-basis:100%}.site-footer{flex-wrap:wrap}.footer-links a,.header-nav a{display:inline-flex;align-items:center;min-height:44px;font-size:14px}.footer-bottom,.preview-note{font-size:14px}.footer-bottom{padding:0}.preview-note{margin-top:12px;padding-bottom:0}@media (hover:hover) and (pointer:fine){a:hover{color:var(--green)}.step:hover,.chip:hover,.secondary:hover{background:var(--soft-2)}.primary:hover{background-color:var(--green-hover)}}@media (prefers-reduced-motion:no-preference){:root[data-input=pointer] button:not(:disabled){transition:transform .12s var(--ease-out),background-color .14s ease,border-color .14s ease,color .14s ease}:root[data-input=pointer] button:not(:disabled):active{transform:scale(.97)}:root[data-input=pointer] dialog{opacity:0;transform:scale(.97);transition:opacity .15s var(--ease-out),transform .15s var(--ease-out),display .15s allow-discrete,overlay .15s allow-discrete}:root[data-input=pointer] dialog[open]{opacity:1;transform:scale(1);transition-duration:.2s}:root[data-input=pointer] dialog::backdrop{background:#0c282b00;transition:background-color .15s ease,display .15s allow-discrete,overlay .15s allow-discrete}:root[data-input=pointer] dialog[open]::backdrop{background:#0c282b80}@starting-style{:root[data-input=pointer] dialog[open]{opacity:0;transform:scale(.97)}:root[data-input=pointer] dialog[open]::backdrop{background:#0c282b00}}:root[data-input=pointer] .advanced summary:after{transition:transform .18s var(--ease-out)}}.advanced summary:after{content:"+";display:inline-block}.advanced[open] summary:after{content:"+";transform:rotate(45deg)}@media (max-width:700px){.site-header{height:64px;gap:8px}.brand{font-size:18px}.hero{padding:10px 0}.hero h1{font-size:28px}.hero p{font-size:16px;margin-top:6px}.form-side{padding:12px 16px 16px}.modes{margin-bottom:8px}.modes button{min-height:52px}.field-label{font-size:16px}.time-input{font-size:32px;min-height:60px}.setting-row .setting-name{max-width:none;flex-basis:auto;font-size:16px}.setting-row .choices{flex-wrap:wrap;gap:8px}.choices .chip{padding:7px 10px;font-size:16px;min-height:44px}.theme button{min-width:44px;min-height:44px;font-size:14px;padding:5px}.submit{min-height:50px;font-size:16px}.result-side{padding:20px 16px}.result-time{font-size:52px}.result-time.result-message{font-size:30px}.timeline{gap:10px}.timeline span,.timeline small{font-size:14px}.timeline .event{padding-left:8px}.timeline strong{font-size:18px}.how{grid-template-columns:1fr;gap:22px}.how h3{font-size:19px}.how p,.section-head p{font-size:16px}.two-fields{grid-template-columns:1fr}dialog{padding:22px}dialog .dialog-actions{flex-wrap:wrap}}@media (max-width:359px){.brand{font-size:16px}.modes button{font-size:13px}.theme button{min-width:44px}.modes{gap:3px}}@media (min-width:960px){.hero{padding-top:18px;padding-bottom:14px}.modes button{min-height:44px}.modes{margin-bottom:12px}}:root{--phase-wake:#687383;--phase-n1:#7458b3;--phase-n2:#18788b;--phase-n3:#355caa;--phase-rem:#9e6518}:root[data-theme=night]{--phase-wake:#a6afc0;--phase-n1:#c1a9fa;--phase-n2:#69c7cd;--phase-n3:#86aafb;--phase-rem:#edc179}.header-nav a[aria-current=page]{color:var(--green);text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px}.sleep-chart{margin:24px 0 0;padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--surface);min-width:0}.chart-kicker{display:block;color:var(--green);font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;margin-bottom:5px}.sleep-chart h3{font-size:20px;line-height:1.3;letter-spacing:-.02em;margin:0}.sleep-chart .chart-summary{font-size:14px;line-height:1.6;margin:12px 0 0;font-variant-numeric:tabular-nums}.sleep-chart .chart-warning{font-size:14px;line-height:1.55;color:var(--muted);margin:7px 0 18px}.chart-canvas{display:grid;grid-template-columns:38px minmax(0,1fr);gap:5px;min-width:0;margin-top:14px}.chart-y-labels{height:220px;position:relative;margin-top:22px;color:var(--muted);font-size:12px;font-weight:650}.chart-y-labels span{position:absolute;right:0;transform:translateY(-50%)}.chart-plot{min-width:0}.chart-cycle-labels{height:22px;position:relative;color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}.chart-cycle-labels span{position:absolute;transform:translate(-50%);white-space:nowrap}.hypnogram{width:100%;height:220px;overflow:visible}.hypnogram line,.hypnogram path{vector-effect:non-scaling-stroke}.chart-grid{stroke:var(--line);stroke-width:1}.chart-cycle-boundary{stroke:var(--line);stroke-width:1;stroke-dasharray:3 5}.chart-stage{stroke:currentColor;stroke-width:3;fill:none}.chart-stage-fill{fill:currentColor;opacity:.12}.chart-connector{stroke:var(--control);stroke-width:1}.chart-wake-marker{stroke:var(--control);stroke-width:1.5;stroke-dasharray:3 4}.chart-axis-line{stroke:var(--control);stroke-width:1}.phase-wake{color:var(--phase-wake)}.phase-n1{color:var(--phase-n1)}.phase-n2{color:var(--phase-n2)}.phase-n3{color:var(--phase-n3)}.phase-rem{color:var(--phase-rem)}.chart-hours{height:60px;position:relative;font-variant-numeric:tabular-nums}.chart-tick{position:absolute;top:7px;transform:translate(-50%);white-space:nowrap;text-align:center;font-size:14px;line-height:1.4}.chart-tick.tick-0{transform:none;text-align:left}.chart-tick.tick-4{transform:translate(-100%);text-align:right}.chart-tick b{display:block;font-weight:650}.chart-tick small{display:block;font-size:11px;color:var(--muted)}.chart-legend{display:flex;flex-wrap:wrap;gap:8px 18px;list-style:none;margin:12px 0 0;padding:14px 0 0;border-top:1px solid var(--line)}.chart-legend li{display:flex;align-items:flex-start;gap:8px;font-size:14px;line-height:1.5;margin:0}.chart-swatch{display:inline-block;width:12px;height:12px;border-radius:3px;background:currentColor;flex:none;margin-top:4px}.sleep-chart figcaption{font-size:12px;line-height:1.6;color:var(--muted);margin-top:15px}.chart-guide-link{display:inline-flex;align-items:center;min-height:44px;font-size:14px;color:var(--green);margin-top:4px;text-underline-offset:3px}.sleep-chart .chart-message{padding:14px;background:var(--soft);border-radius:9px;font-size:14px;line-height:1.6;margin:16px 0}.result-side[data-state=stale] .sleep-chart{border-style:dashed}.article .sleep-chart{margin:24px 0}.article .sleep-chart p{margin-bottom:0}.article .chart-legend li{font-size:14px;line-height:1.5;margin:0}.article .chart-guide-link{display:none}.article-meta{color:var(--muted);font-size:14px!important;line-height:1.7!important}.article-intro{margin:26px 0;padding-left:20px;border-left:3px solid var(--green)}.article-toc{margin:30px 0;padding:22px 26px;border:1px solid var(--line);border-radius:16px;background:var(--soft)}.article .article-toc h2{font-size:20px;margin:0 0 10px}.article-toc ul{margin:0;padding-left:20px}.article .article-toc li{margin:0;font-size:16px;line-height:1.6}.article-toc a{display:inline-flex;align-items:center;min-height:40px;text-underline-offset:4px}.article [id]{scroll-margin-top:20px}.article table caption{text-align:left;padding:14px;font-size:14px;line-height:1.5;color:var(--muted)}@media (min-width:701px) and (max-width:980px){.header-right,.header-nav{gap:12px}.header-nav a{font-size:13px}}@media (max-width:700px){.site-header{height:auto;min-height:64px;flex-wrap:wrap;gap:0 8px;padding:8px 0 0}.header-right{display:contents}.site-header>.brand{order:1}.site-header .theme{order:2;margin-left:auto}.header-nav{order:3;display:flex;width:100%;gap:22px;border-top:1px solid var(--line);margin-top:8px}.header-nav a{font-size:14px;min-height:44px}.sleep-chart{padding:15px 12px}.sleep-chart h3{font-size:20px}.chart-canvas{grid-template-columns:34px minmax(0,1fr);gap:4px}.chart-legend{display:grid;grid-template-columns:1fr;gap:8px}.chart-tick.tick-1,.chart-tick.tick-3{display:none}.article .article-toc{padding:18px}.article-intro{padding-left:15px}}.hero{padding:12px 0 16px}.hero .eyebrow{display:none}.hero h1{font-size:32px;line-height:1.15}.hero p{font-size:16px;margin-top:5px;line-height:1.4}.calculator-compact{--plot-height:160px;align-items:start}.calculator-compact .form-side,.calculator-compact .result-side{padding:18px}.calculator-compact #calculator-controls{display:flex;flex-direction:column}.calculator-compact .modes{order:0;display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:3px;margin:0 0 12px}.calculator-compact .modes button{font-size:14px;min-height:44px}.calculator-compact #primary-time-group{order:1}.calculator-compact #duration-end{order:2}.calculator-compact .plan-settings{order:3}.calculator-compact .settings-toolbar{order:2}.calculator-compact .field-label{font-size:14px;margin-bottom:6px}.calculator-compact .time-input{min-height:56px;font-size:32px;line-height:1.2}.calculator-compact .time-row{grid-template-columns:minmax(0,1fr) 50px 50px}.calculator-compact .step{font-size:14px;font-weight:700;min-height:48px}.calculator-compact .quick-times{margin:12px 0 0;gap:6px;flex-wrap:nowrap}.calculator-compact .quick-times .chip{flex:1;min-width:0;padding:7px 4px;font-size:14px}.calculator-compact .date-line{font-size:12px;margin:3px 0 8px}.calculator-compact .date-line button{font-size:12px;min-height:36px}.calculator-compact .setting-row{display:block;margin:12px 0}.calculator-compact .setting-name{display:block;font-size:14px;max-width:none;margin-bottom:7px;line-height:1.4}.calculator-compact .choices{gap:6px;flex-wrap:wrap}.calculator-compact .choices .chip{min-height:44px;font-size:14px;padding:7px 10px}.calculator-compact .cycle-control{margin:14px 0 0}.cycle-input-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.cycle-custom{position:relative;width:88px}.cycle-custom input{min-height:44px;width:100%;padding:8px 27px 8px 9px;font-size:16px}.cycle-custom>span{position:absolute;right:8px;top:12px;font-size:12px;color:var(--muted);pointer-events:none}.calculator-compact .cycle-control .hint{font-size:12px;line-height:1.5;margin-top:6px}.calculator-compact .settings-toolbar{display:block;margin-top:10px}.settings-toggle,.calculate-short,.apply-settings{display:none}.calculator-compact .submit{margin:0;min-height:44px;font-size:14px;padding:10px 12px;gap:10px}.calculator-compact .advanced{margin-top:12px;padding-top:5px}.calculator-compact .advanced summary{font-size:13px;line-height:1.5;min-height:44px}.calculator-compact .privacy-mini{font-size:12px;margin-top:7px}.calculator-compact .privacy-mini svg{width:12px;height:12px}.result-overview{border:1px solid var(--green);border-left-width:3px;background:var(--surface);border-radius:12px;padding:10px 14px}.calculator-compact .result-status{margin:0 0 5px;align-items:center;flex-wrap:nowrap;gap:8px}.calculator-compact .badge{font-size:10px;line-height:1.4;padding:3px 7px}.calculator-compact .result-zone{font-size:12px;line-height:1.4}.calculator-compact .result-label{font-size:14px;line-height:1.4;color:var(--ink);font-weight:600}.result-answer{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:12px}.calculator-compact .result-time{font-size:44px;line-height:1.05;letter-spacing:-.045em;margin:3px 0 0}.calculator-compact .result-time.result-message{font-size:24px;line-height:1.2}.calculator-compact .result-date{font-size:12px;line-height:1.5;margin:2px 0 0;color:var(--muted)}.calculator-compact .result-context{font-size:12px;line-height:1.4;margin:0;text-align:right}.calculator-compact .result-context b{display:block;font-size:20px;line-height:1.3;color:var(--green)}.calculator-compact .result-context span,.calculator-compact .result-context small{display:block;font-size:12px;line-height:1.5}.calculator-compact .result-context small{color:var(--muted)}.calculator-compact .sleep-chart-compact{margin:12px 0 0;padding:12px;border-radius:12px}.sleep-chart-compact .chart-heading{display:flex;justify-content:space-between;gap:8px;align-items:baseline}.sleep-chart-compact .chart-heading h3{font-size:14px;line-height:1.4;letter-spacing:0;margin:0;font-weight:650}.sleep-chart-compact .chart-heading .chart-summary{font-size:12px;line-height:1.5;margin:0;text-align:right}.sleep-chart-compact .chart-canvas{margin-top:8px;grid-template-columns:32px minmax(0,1fr);gap:5px}.sleep-chart-compact .hypnogram{height:var(--plot-height)}.sleep-chart-compact .chart-y-labels{height:var(--plot-height);margin-top:18px;font-size:12px}.sleep-chart-compact .chart-cycle-labels{height:18px;font-size:11px;line-height:1.5}.sleep-chart-compact .chart-hours{height:40px}.sleep-chart-compact .chart-tick{font-size:13px;top:4px}.sleep-chart-compact .chart-tick small{font-size:10px;line-height:1.3}.sleep-chart-compact .chart-legend{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px 8px;margin:5px 0 0;padding:9px 0 0}.sleep-chart-compact .chart-legend li{font-size:13px;line-height:1.5;gap:6px;white-space:nowrap}.sleep-chart-compact .chart-swatch{width:10px;height:10px;margin-top:5px}.sleep-chart-compact figcaption{font-size:12px;line-height:1.5;margin:8px 0 0}.calculator-compact .action-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;margin-top:12px}.calculator-compact .action-grid .secondary{font-size:12px;gap:5px;padding:8px 5px;min-width:0;min-height:44px}.calculator-compact .action-grid svg{width:14px;height:14px}.calculator-compact .result-foot{margin-top:0}.calculator-compact .result-foot button,.calculator-compact .result-foot .small{font-size:12px}.calculator-compact #action-status:empty{display:none}.plan-details{border-top:1px solid var(--line);margin-top:6px}.plan-details>summary{cursor:pointer;font-size:13px;font-weight:600;min-height:44px;display:flex;align-items:center;gap:8px;list-style:none}.plan-details>summary:after{content:"+";margin-left:auto}.plan-details[open]>summary:after{content:"\2212"}.calculator-compact .plan-details .timeline{margin:8px 0 12px;padding:12px 0}.calculator-compact .plan-details .timeline strong{font-size:16px}.calculator-compact .plan-details .timeline span,.calculator-compact .plan-details .timeline small{font-size:12px}.calculator-compact .cycles{margin-top:12px;padding-top:12px}.calculator-compact .cycles h3{font-size:16px;line-height:1.4}.calculator-compact .cycle-note{font-size:12px;margin:5px 0 10px}#cycle-cards{display:grid;grid-template-columns:1fr 1fr;gap:8px}#cycle-cards:has(>.cycle-card:only-child){grid-template-columns:1fr}.calculator-compact button.cycle-card{display:flex;flex-direction:column;align-items:start;gap:4px;width:100%;height:100%;margin:0;padding:12px;text-align:left;border-color:var(--control);border-radius:10px;background:var(--surface);min-width:0}.calculator-compact .cycle-card strong{font-size:23px}.calculator-compact .cycle-card>span{font-size:13px;line-height:1.5}.calculator-compact .cycle-card>small{font-size:12px;line-height:1.5;color:var(--muted)}.calculator-compact .cycle-card-action{color:var(--green);text-decoration:underline;text-underline-offset:3px;margin-top:auto;padding-top:4px}.calculator-compact .cycle-card[aria-pressed=true]{border-color:var(--green);box-shadow:inset 0 0 0 1px var(--green);background:var(--soft-2)}.calculator-compact .cycle-card.is-past{border-style:dashed;background:var(--paper)}.calculator-compact .cycle-card.is-past .cycle-card-action{color:var(--muted);text-decoration:none}@media (min-width:800px){.calculator-compact{display:grid;grid-template-columns:minmax(0,40%) minmax(0,60%)}.calculator-compact .result-side{border-left:1px solid var(--line);border-top:0;min-width:0}.calculator-compact .form-side{min-width:0}.calculator-compact .modes{grid-template-columns:repeat(4,minmax(0,1fr))}.calculator-compact .modes button{font-size:12px}.calculator-compact .settings-toolbar{margin-top:10px;margin-bottom:2px}}@media (min-width:1031px){.calculator-compact .setting-row{display:flex;gap:10px;align-items:center;margin:12px 0}.calculator-compact .setting-name{flex:0 0 105px;margin:0;font-size:13px}.calculator-compact .setting-row .choices{flex-wrap:nowrap;gap:5px}.calculator-compact .setting-row .choices .chip{padding:7px 9px}}@media (min-width:800px) and (max-width:1030px){.calculator-compact .form-side,.calculator-compact .result-side{padding:14px}.calculator-compact .result-zone{max-width:130px}.calculator-compact .choices .chip{padding:7px 8px}.sleep-chart-compact .chart-legend{grid-template-columns:1fr 1fr}}@media (max-width:799px){.hero{padding:8px 0 10px}.hero h1{font-size:25px;line-height:1.15}.hero p{font-size:14px;line-height:1.4;margin-top:3px}.hero-note{display:none}.calculator-compact{display:block;border-radius:14px}.calculator-compact .form-side{padding:8px 12px}.calculator-compact .result-side{padding:8px 12px;border-left:0;border-top:1px solid var(--line)}.calculator-compact .modes{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:2px;margin-bottom:8px;padding:3px}.calculator-compact .modes button{font-size:12px;padding:3px;min-height:44px;line-height:1.3}.calculator-compact .field-label{font-size:14px;line-height:1.4;margin-bottom:4px}.calculator-compact .time-input{font-size:30px;min-height:48px;padding:5px 12px}.calculator-compact .time-row{gap:6px}.calculator-compact .step{min-height:44px;font-size:14px}.calculator-compact #time-hint{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.calculator-compact .settings-toolbar{order:3;display:grid;grid-template-columns:minmax(0,1fr) 90px;gap:8px;margin-top:6px}.calculator-compact .plan-settings{order:4;padding-top:6px}.calculator-compact:not([data-ready]) .plan-settings{display:none}.settings-toggle{display:flex;flex-direction:column;justify-content:center;align-items:start;border:1px solid var(--control);border-radius:9px;padding:4px 9px;min-width:0;min-height:44px;background:var(--surface);text-align:left}.settings-toggle>span{display:flex;width:100%;justify-content:space-between;align-items:center;font-size:11px;line-height:1.3;color:var(--muted)}.settings-toggle strong{font-size:12px;line-height:1.5;font-weight:600;white-space:nowrap}.settings-chevron{width:7px;height:7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg);margin:0 2px 3px 6px}.settings-toggle[aria-expanded=true] .settings-chevron{transform:rotate(225deg);margin-bottom:0}.calculator-compact .submit{min-height:44px;padding:8px;font-size:14px}.calculate-short{display:inline}.calculator-compact #calculate-caption,.calculator-compact .submit svg{display:none}.calculator-compact .apply-settings{display:block;width:100%;font-size:14px;margin-top:12px;min-height:44px}.calculator-compact .result-status{display:none}.result-overview{padding:8px 10px}.calculator-compact .result-label{font-size:13px;line-height:1.4}.calculator-compact .result-time{font-size:39px;line-height:1.05}.calculator-compact .result-context b{font-size:18px}.calculator-compact .result-context span,.calculator-compact .result-context small{font-size:11px;line-height:1.5}.calculator-compact .result-date{font-size:11px}.calculator-compact .result-answer{gap:8px}.calculator-compact .sleep-chart-compact{margin-top:8px;padding:10px}.sleep-chart-compact .chart-heading h3{font-size:13px}.sleep-chart-compact .chart-heading .chart-summary{font-size:11px}.sleep-chart-compact .chart-canvas{margin-top:6px;grid-template-columns:29px minmax(0,1fr);gap:4px}.sleep-chart-compact .chart-legend{grid-template-columns:1fr 1fr;gap:4px 8px;padding-top:7px;margin-top:4px}.sleep-chart-compact .chart-legend li{font-size:12px;line-height:1.5}.sleep-chart-compact .chart-tick.tick-1,.sleep-chart-compact .chart-tick.tick-3{display:none}.calculator-compact .action-grid{grid-template-columns:1fr 1fr}}@media (max-width:700px){.site-header{padding-top:4px}.site-header .theme{padding:0}.header-nav{margin-top:4px}}@media (max-width:799px) and (max-height:840px){.calculator-compact{--plot-height:148px}}@media (max-width:799px) and (max-height:820px){.hero p{display:none}}@media (max-width:799px) and (max-height:760px){.hero{padding:6px 0 8px}.hero h1{font-size:23px}.calculator-compact{--plot-height:128px}.sleep-chart-compact .chart-hours{height:32px}.sleep-chart-compact .chart-canvas{margin-top:3px}.calculator-compact .sleep-chart-compact{padding:8px}.calculator-compact .result-time{font-size:36px}}@media (max-width:359px){.calculator-compact .modes button,.settings-toggle strong{font-size:11px}.calculator-compact .settings-toolbar{grid-template-columns:minmax(0,1fr) 78px}.calculator-compact .result-time{font-size:35px}.calculator-compact .result-context span{font-size:11px}.sleep-chart-compact .chart-legend li,.calculator-compact .action-grid .secondary{font-size:12px}}.input-note{font-size:13px;line-height:1.6;color:var(--muted);padding:10px 0;border-bottom:1px solid var(--line);margin:0 0 12px}.calculator-compact .settings-toolbar{margin:0}.calculator-compact .settings-toolbar:has(.settings-toggle:only-child){grid-template-columns:minmax(0,1fr)}.result-side[data-state=invalid] .result-time{color:var(--muted)}.result-side[data-state=invalid] .sleep-chart{border-style:dashed}.editorial{font-size:17px;line-height:1.8}.editorial p{margin:0 0 20px}.editorial h2{font-size:clamp(24px,3vw,32px);line-height:1.25;letter-spacing:-.03em;margin:48px 0 18px;text-wrap:balance}.editorial h3{font-size:21px;line-height:1.4;margin:30px 0 12px;letter-spacing:-.02em}.editorial li{margin:8px 0}.editorial ul,.editorial ol{padding-left:24px;margin:16px 0 24px}.editorial a{text-underline-offset:4px}.editorial .small,.editorial .hint{line-height:1.65}.editorial .eyebrow{margin-bottom:14px}.editorial [id]{scroll-margin-top:24px}.home-editorial{max-width:760px;margin:68px auto 60px;padding-top:42px;border-top:1px solid var(--line)}.editorial-header h2{font-size:clamp(30px,4vw,42px);margin:0 0 22px;line-height:1.15;letter-spacing:-.04em}.editorial .lede{font-size:20px;line-height:1.7;color:var(--muted)}.editorial .article-meta{margin:22px 0;font-size:13px!important}.editorial .article-toc{margin:32px 0;padding:24px 28px}.editorial .toc-title{font-weight:750;font-size:16px;margin:0 0 8px}.editorial .article-toc ol{margin:0;padding-left:20px;columns:2;column-gap:30px}.editorial .article-toc li{break-inside:avoid;margin:0 0 4px;font-size:15px;line-height:1.5}.editorial .article-toc a{min-height:44px;display:inline-flex;align-items:center}.editorial-figure{margin:36px 0 42px}.editorial-figure img{display:block;width:100%;height:auto;border-radius:16px;background:var(--soft)}.editorial-figure figcaption{font-size:13px;color:var(--muted);line-height:1.7;margin-top:12px}.editorial-figure figcaption small{display:block;font-size:12px;margin-top:4px}.editorial .editorial-figure figcaption a{color:inherit}.editorial-formula,.editorial-callout{padding:22px 26px;background:var(--soft);border-left:3px solid var(--green);border-radius:0 12px 12px 0;margin:28px 0!important}.editorial-formula{font-weight:650;font-size:17px}.editorial-callout p:last-child{margin:0}.editorial-faq{border-top:1px solid var(--line);margin:24px 0}.editorial-faq details{border-bottom:1px solid var(--line);padding:0}.editorial-faq summary{font-size:17px;font-weight:650;line-height:1.5;padding:20px 30px 20px 0;cursor:pointer}.editorial-faq p{font-size:16px;margin:0 0 22px}.editorial .table-wrap{margin:24px 0}.editorial table{font-size:14px}.editorial th,.editorial td{font-size:14px;line-height:1.6;padding:14px 16px}.editorial table th[scope=row]{font-weight:600;text-align:left}.guide-tool{border:1px solid var(--line);background:var(--surface);border-radius:20px;padding:28px;display:grid;grid-template-columns:1fr 1fr;gap:28px;margin:32px 0 42px;font-size:15px;line-height:1.6;box-shadow:var(--shadow)}.guide-tool .field-label{font-size:15px;display:block;margin-top:18px}.guide-tool .field-label:first-child{margin-top:0}.guide-tool .two-fields{margin-top:20px;gap:16px;grid-template-columns:1.25fr 1fr}.guide-tool .two-fields .field-label{min-height:48px;margin-top:0;display:flex;align-items:end}.guide-tool .hint{margin:5px 0 8px;font-size:12px}.guide-tool select,.guide-tool input:not([type=checkbox]):not([type=radio]){width:100%;min-height:48px;font-size:16px}.guide-tool .time-input{font-size:30px!important}.guide-tool .time-row{grid-template-columns:minmax(0,1fr) 48px 48px;gap:6px}.guide-tool .step{min-width:0;width:48px;padding:0;font-size:14px;line-height:1}.guide-tool .advanced{margin-top:20px}.guide-tool .advanced summary{font-size:14px}.guide-tool .settings-body{padding-top:14px}.guide-tool .error{font-size:13px;margin:8px 0}.nap-result,.needs-result{padding:22px;background:var(--soft);border-radius:14px;min-width:0}.guide-tool .eyebrow{font-size:11px;line-height:1.5}.guide-tool .nap-wake,.guide-tool .needs-range{font-size:38px;line-height:1.2;letter-spacing:-.04em;font-weight:740;margin:0 0 12px;font-variant-numeric:tabular-nums}.guide-tool .small{font-size:13px}.guide-tool p{margin-bottom:14px}.guide-tool .guide-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.guide-tool .secondary{font-size:13px;min-height:44px;padding:8px 12px}.nap-timeline{margin:24px 0 20px}.nap-bars{display:flex;gap:3px;height:12px;border-radius:6px;overflow:hidden}.nap-bars span:first-child{background:#74868c;flex-grow:5;min-width:3px}.nap-bars span:last-child{background:var(--green);flex-grow:20;min-width:3px}.nap-times{display:flex;justify-content:space-between;gap:8px;margin:12px 0;font-size:10px;color:var(--muted)}.nap-times span:last-child{text-align:right}.nap-times strong{display:block;font-size:14px;color:var(--ink);font-variant-numeric:tabular-nums}.guide-tool .nap-legend{padding:0;list-style:none;font-size:12px;margin:16px 0}.nap-legend li{display:flex;align-items:center;gap:8px;margin:4px 0}.nap-legend li:before{content:"";width:8px;height:8px;flex-shrink:0;border-radius:2px;background:#74868c}.nap-legend li:last-child:before{background:var(--green)}.needs-tool #needs-comparison{font-weight:650;margin:24px 0 16px}.guide-tool[data-state=invalid] .nap-wake{color:var(--muted)}.guide-tool .notice{font-size:13px}#n-occurrences fieldset{border:1px solid var(--line);padding:14px;border-radius:10px;font-size:14px}#n-occurrences label{display:flex;align-items:center;gap:8px;min-height:44px}@media (min-width:800px){.calculator-compact .settings-toolbar{display:none}}@media (max-width:799px){.calculator-compact .settings-toolbar{display:block;margin-top:6px}.calculator-compact .settings-toggle{width:100%}.header-nav{justify-content:space-between;gap:8px}.header-nav a{font-size:13px}.editorial{font-size:16px;line-height:1.8}.home-editorial{margin-top:40px;padding-top:30px}.editorial h2{margin-top:36px}.editorial h3{font-size:20px}.editorial .lede{font-size:18px}.editorial .article-toc{padding:18px 20px}.editorial .article-toc ol{columns:1}.editorial-figure{margin:28px 0 34px}.editorial-figure img{border-radius:12px}.editorial-callout,.editorial-formula{padding:18px;font-size:16px}.editorial th,.editorial td{font-size:13px;padding:12px}.guide-tool{grid-template-columns:1fr;padding:18px;gap:22px;border-radius:16px}.guide-tool .two-fields .field-label{min-height:48px;margin-top:0}.nap-result,.needs-result{padding:20px}.guide-tool .nap-wake,.guide-tool .needs-range{font-size:36px}}@media (max-width:359px){.guide-tool .two-fields .field-label{min-height:72px}}@media (prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;scroll-behavior:auto!important}}@media print{@page{size:A4;margin:18mm}html{color-scheme:light!important}body{background:#fff!important;color:#152b29!important;font-size:11pt}.site-header,main,.site-footer,.footer-bottom,.preview-note,.skip,dialog{display:none!important}#print-plan{display:block!important;max-width:100%;color:#152b29!important;background:#fff!important}#print-plan h1{font-size:25pt;margin-bottom:20px}#print-plan pre{white-space:pre-wrap;font:11pt/1.7 system-ui,sans-serif;overflow-wrap:anywhere}#print-plan p{font-size:10pt;margin-top:20px}#print-plan .print-date{font-size:10pt;margin-bottom:20px}a{color:inherit}}@media (max-width:1050px){.nav-label-detail{display:none}}:root{--cycle-band-a:#f4f5f7;--cycle-band-b:#e5e8ed;--cycle-line:#7b8496;--chart-grid:#cdd2dc}:root[data-theme=night]{--cycle-band-a:#21252e;--cycle-band-b:#303642;--cycle-line:#8b95a8;--chart-grid:#454d5d}.result-overview{border-color:var(--line);border-left-color:var(--green)}.calculator-compact .result-time{color:var(--ink)}.chart-latency-band{fill:var(--paper)}.chart-cycle-band.band-a{fill:var(--cycle-band-a)}.chart-cycle-band.band-b{fill:var(--cycle-band-b)}.chart-grid{stroke:var(--chart-grid)}.chart-cycle-boundary{stroke:var(--cycle-line);stroke-width:1;stroke-dasharray:3 4}.chart-hours,.sleep-chart-compact .chart-hours{height:56px}.cycle-clock{display:block!important;font-size:12px;line-height:1.3;transform:translate(-50%)}.cycle-clock small{font-size:10px;line-height:1.2}.cycle-clock.clock-first{transform:none}.cycle-clock.clock-last{transform:translate(-100%);top:29px}.hero{display:flex;align-items:flex-start;justify-content:space-between;gap:24px}.hero-title{min-width:0;flex:1}.nap-hero+.article{margin-top:16px}.nap-hero+.article>.guide-tool:first-child{margin-top:0}.local-clock{display:flex;flex:0 0 auto;flex-direction:column;align-items:flex-end;gap:2px;max-width:230px;padding-top:1px;text-align:right}.local-clock time{display:block;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:32px;line-height:1.1;letter-spacing:-.06em;font-weight:550;font-variant-numeric:tabular-nums;color:var(--ink)}.local-clock-zone{display:block;font-size:11px;line-height:1.25;color:var(--muted);max-width:230px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.article-title-row{display:flex;gap:24px;align-items:center;justify-content:space-between}.article-title-row h1{min-width:0;flex:1}.article-title-row .local-clock{max-width:185px}.nap-duration-field{margin-top:22px}.guide-tool .nap-duration-field>legend{font-size:15px;font-weight:650;margin-bottom:10px}.nap-duration-options{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px}.nap-kind-card{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;min-height:72px;min-width:0;padding:10px 3px;background:var(--surface);border:1px solid var(--control);border-radius:11px;cursor:pointer;text-align:center}.nap-kind-card strong{font-size:15px;line-height:1.3;white-space:nowrap;font-variant-numeric:tabular-nums}.nap-kind-card>span{font-size:11px;line-height:1.4;color:var(--muted);white-space:nowrap}.nap-kind-card:has(input:checked){background:var(--soft-2);border-color:var(--green);box-shadow:inset 0 0 0 1px var(--green)}.nap-kind-card:has(input:checked) strong{color:var(--green)}.nap-kind-card:has(input:focus-visible){outline:3px solid var(--focus);outline-offset:3px}.nap-latency{margin-top:20px}@media (hover:hover) and (pointer:fine){.nap-kind-card:hover{border-color:var(--green);background:var(--soft)}}@media (max-width:799px){.hero{gap:8px}.hero h1{font-size:clamp(20px,5.1vw,25px)}.local-clock{max-width:74px;gap:1px;padding-top:0}.local-clock time{font-size:23px;line-height:1}.local-clock-zone{font-size:9px;line-height:1.2;max-width:74px}.local-clock [data-local-city]{display:none}.article-title-row{gap:12px}.article .article-title-row h1{font-size:clamp(23px,5.6vw,34px)}.article-title-row .local-clock{max-width:74px}.sleep-chart-compact .cycle-clock{font-size:11px}.sleep-chart-compact .cycle-clock small{font-size:9px;line-height:1.2}}@media (max-width:799px) and (max-height:840px){.calculator-compact{--plot-height:140px}}@media (max-width:799px) and (max-height:760px){.calculator-compact{--plot-height:100px}.hero{padding-top:4px;padding-bottom:6px}}@media (max-width:359px){.nap-kind-card strong{font-size:13px}.nap-kind-card>span{font-size:10px}}:root{--clock-top:#303644;--clock-bottom:#242936;--clock-digit:#fff}:root[data-theme=night]{--clock-top:#303644;--clock-bottom:#242936;--clock-digit:#f2f3f8}.local-clock time.flip-clock{font-size:28px;line-height:1.2;letter-spacing:0;font-weight:650}.flip-clock-face{display:flex;align-items:center;gap:3px}.flip-digit{position:relative;display:block;width:.68em;height:1.2em;perspective:180px;border-radius:4px;box-shadow:0 1px 2px #0003;color:var(--clock-digit)}.flip-digit:after{content:"";position:absolute;z-index:5;top:50%;left:0;right:0;height:1px;background:#111319;opacity:.7;pointer-events:none}.flip-value{display:flex;align-items:center;justify-content:center;width:100%;height:100%;border-radius:inherit;background:linear-gradient(var(--clock-top) 50%,var(--clock-bottom) 50%)}.flip-half{position:absolute;left:0;right:0;height:50%;overflow:hidden;backface-visibility:hidden;background:var(--clock-top);border-radius:4px 4px 0 0}.flip-half>span{display:flex;align-items:center;justify-content:center;height:200%;width:100%;line-height:1.2}.flip-top,.flip-leaf-top{top:0;transform-origin:50% 100%}.flip-under-bottom,.flip-leaf-bottom{bottom:0;transform-origin:50% 0;background:var(--clock-bottom);border-radius:0 0 4px 4px}.flip-under-bottom>span,.flip-leaf-bottom>span{transform:translateY(-50%)}.flip-under-bottom,.flip-leaf-top,.flip-leaf-bottom{visibility:hidden;z-index:3}.flip-digit[data-flipping] .flip-under-bottom{visibility:visible;z-index:2}.flip-digit[data-flipping] .flip-leaf-top{visibility:visible;animation:clock-fold-up .13s var(--ease-out) both}.flip-digit[data-flipping] .flip-leaf-bottom{visibility:visible;z-index:4;animation:clock-fold-down .13s var(--ease-out) .13s both}.flip-colon{font-size:.8em;line-height:1;color:var(--muted);width:.2em;text-align:center}@keyframes clock-fold-up{0%{transform:rotateX(0)}to{transform:rotateX(-90deg)}}@keyframes clock-fold-down{0%{transform:rotateX(90deg)}to{transform:rotateX(0)}}.sleep-chart .chart-y-labels{margin-top:var(--cycle-label-height,22px)}.sleep-chart-compact{--cycle-label-height:18px}.sleep-chart-compact .hypnogram,.sleep-chart-compact .chart-y-labels{height:max(80px,calc(var(--plot-height) - var(--cycle-label-extra,0px)))}@media (max-width:799px){.local-clock time.flip-clock{font-size:20px}.flip-clock-face{gap:2px}.flip-digit,.flip-half{border-radius:3px}.flip-under-bottom,.flip-leaf-bottom{border-radius:0 0 3px 3px}.flip-top,.flip-leaf-top{border-radius:3px 3px 0 0}}@media (prefers-reduced-motion:reduce){.flip-digit[data-flipping] .flip-under-bottom,.flip-digit[data-flipping] .flip-leaf-top,.flip-digit[data-flipping] .flip-leaf-bottom{animation:none;visibility:hidden}}:root{--brand-art:url(/images/sommeil-clair-rythme-day.webp);--brand-scale:108.275175%;--brand-x:53.614458%;--brand-y:51.02488%}:root[data-theme=night]{--brand-art:url(/images/sommeil-clair-rythme-night.webp);--brand-scale:109.531014%;--brand-x:54.497354%;--brand-y:50.67269%}.brand{display:inline-flex;flex:0 0 auto;width:210px;min-height:44px;gap:0;letter-spacing:0}.brand-art{display:block;width:100%;aspect-ratio:4.65;background-image:var(--brand-art);background-repeat:no-repeat;background-size:var(--brand-scale) auto;background-position:var(--brand-x) var(--brand-y)}.site-footer .brand{width:220px}@media (min-width:701px) and (max-width:980px){.site-header .brand{width:190px}}@media (max-width:700px){.site-header .brand{width:160px;max-width:calc(100% - 144px)}}@media (forced-colors:active){.brand-art{display:none}.brand .sr-only{position:static;width:auto;height:auto;clip:auto;overflow:visible;font-size:18px;font-weight:700;white-space:normal}}.audience{grid-column:1/-1;border-top:1px solid var(--line);padding-top:20px}.audience h2{font-size:16px;letter-spacing:0}.audience .choices{margin:10px 0;flex-wrap:wrap}@media print{.audience{display:none}}