[hidden]{display:none!important}.nav [aria-current=page]{border-bottom-color:#9d7e45;color:#786035}.modes-hero{background:var(--dark);color:var(--paper);position:relative;overflow:hidden}.modes-hero>img{position:absolute;right:0;top:0;width:77%;height:100%;object-fit:cover;object-position:58% center;opacity:.83}.modes-hero:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#0c2019 4%,#0c2019f7 26%,#0c2019a3 47%,#0c201915 82%),linear-gradient(0deg,#0c2019a3,transparent 60%)}.modes-hero .wrap{position:relative;z-index:1;min-height:581px;padding:27px 0 60px}.breadcrumbs{display:flex;gap:12px;font-size:10px;color:#bdcab6;margin-bottom:50px}.breadcrumbs [aria-current]{color:#d9c08f}.breadcrumbs a:hover{text-decoration:underline}.modes-hero .eyebrow{font-size:9px;letter-spacing:2px;color:#d8bf91}.modes-hero h1{font:normal clamp(49px,5vw,70px)/1.08 var(--serif);letter-spacing:-2px;margin:23px 0}.modes-hero h1 em{font-weight:normal;color:#d8bf90}.modes-lead{font-size:14px;line-height:1.9;color:#d0d9c9;max-width:355px;margin:0 0 28px}.modes-hero .hero-actions{gap:24px;flex-wrap:wrap}.tempo-plaque{position:absolute;bottom:43px;right:0;border:1px solid #c2ad7a8c;padding:23px 28px;background:#11291de8;min-width:252px}.tempo-plaque small{font-size:8px;letter-spacing:2px;color:#d7bf8f;display:block}.tempo-plaque strong{font:normal 52px var(--serif);letter-spacing:-1px;display:block;margin:9px 0}.tempo-plaque span{display:block;font-size:10px;color:#d0dac4}.modes-jump{border-bottom:1px solid var(--line)}.modes-jump .wrap{display:grid;grid-template-columns:repeat(3,1fr)}.modes-jump a{display:flex;align-items:center;gap:19px;padding:23px 25px;border-right:1px solid var(--line);font-size:12px}.modes-jump a:first-child{padding-left:0}.modes-jump a:last-child{border:0}.modes-jump small{font:italic 23px var(--serif);color:#8f7548}.modes-jump .arrow{margin-left:auto}.modes-jump a:hover{text-decoration:underline;text-underline-offset:4px}.tempo-section{padding:73px 0 69px}.modes-heading{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:end;margin-bottom:33px}.modes-heading h2{font:normal 42px/1.15 var(--serif);letter-spacing:-1px;margin:20px 0 0}.modes-heading>p{font-size:13px;color:var(--muted);line-height:1.9;margin:0}.tempo-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:19px}.tempo-card{display:flex;flex-direction:column;border:1px solid var(--line);padding:26px 23px;background:#fbf9f3}.tempo-card small{font-size:8px;letter-spacing:1.7px;color:#887147}.tempo-card h3{font:normal 29px var(--serif);margin:17px 0 12px}.tempo-time{font:normal 43px/1.1 var(--serif);color:#8c754a;letter-spacing:-1px;margin:0 0 6px}.tempo-card .time-label{font-size:9px;color:#788169;margin-bottom:21px}.tempo-card>p{font-size:12px;line-height:1.85;color:var(--muted);margin:0 0 20px;flex:1}.tempo-card .tempo-character{border-top:1px solid var(--line);padding-top:17px;font-size:10px;color:#627154;line-height:1.7}.tempo-card.featured{background:var(--ink);color:var(--paper);border-color:var(--ink)}.tempo-card.featured small,.tempo-card.featured .tempo-time{color:#d8bd8c}.tempo-card.featured .time-label,.tempo-card.featured>p{color:#cbd7c0}.tempo-card.featured .tempo-character{border-color:#627859;color:#d2ddc6}.tempo-note{font-size:11px;color:var(--muted);line-height:1.85;margin:22px 0 0;max-width:1030px}.time-notation{background:#e9eadf;padding:59px 0}.notation-grid{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}.notation-grid h2{font:normal 42px/1.15 var(--serif);letter-spacing:-1px;margin:21px 0}.notation-grid p{font-size:13px;color:#5f6d55;line-height:1.9;max-width:450px;margin:0}.notation-art{display:flex;align-items:center;justify-content:center;gap:25px;border:1px solid #bec8b0;padding:33px 23px;background:#f5f2e8}.notation-number{display:flex;flex-direction:column;text-align:center}.notation-number strong{font:normal 71px/1 var(--serif);letter-spacing:-2px}.notation-number span{font-size:10px;color:#66755b;line-height:1.8;margin-top:13px}.notation-plus{font:italic 47px var(--serif);color:#9a8052;padding-bottom:38px}.notation-art small{display:block;font-size:8px;letter-spacing:1.4px;color:#8a7247;margin-top:6px}.clock-section{padding:72px 0}.clock-layout{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:stretch}.time-inputs{border:1px solid var(--line);padding:31px}.time-inputs h3{font:normal 27px var(--serif);margin:0 0 23px}.preset-label{font-size:10px;color:var(--muted);margin:0 0 10px}.time-presets{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:26px}.time-presets button{font-size:11px;border:1px solid #bdc8b0;padding:9px 13px;background:transparent;color:var(--ink);min-height:40px;cursor:pointer}.time-presets button[aria-pressed=true]{background:var(--ink);color:var(--paper);border-color:var(--ink)}.time-presets button:hover{border-color:#81976d}.input-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.time-field label{font-size:11px;display:block;margin-bottom:9px}.time-field input{display:block;width:100%;font:normal 30px var(--serif);padding:10px 12px;background:#fbf9f3;border:1px solid #bcc8af;color:var(--ink);border-radius:0;min-height:57px}.time-field input:focus-visible{outline:3px solid #aa7d34;outline-offset:3px}.time-field input[aria-invalid=true]{border-color:#9a432d}.time-field small{display:block;font-size:9px;color:#6a785f;margin-top:9px;line-height:1.8}.calc-help{font-size:11px;line-height:1.85;color:var(--muted);margin:22px 0 0}.calc-result{padding:31px 34px;background:var(--ink);color:var(--paper);display:flex;flex-direction:column;justify-content:center;min-height:320px}.calc-result .eyebrow{color:#d6bc8b;font-size:9px;letter-spacing:1.7px}.result-control{font:normal 25px var(--serif);color:#c7d4bd;margin:18px 0 8px}.calc-result h3{font:normal 47px/1.1 var(--serif);letter-spacing:-1px;margin:0 0 23px}.result-equation{font-size:13px;color:#d0ddc5;margin:0 0 17px}.result-rule{font-size:11px;line-height:1.8;color:#c0ceb3;border-top:1px solid #6c805c;padding-top:17px;margin:0}.result-bullet{font-size:10px;line-height:1.8;color:#e0ca9e;margin:15px 0 0}.calc-error{padding:30px;border:1px solid #aa674e;background:#f3e8dc;color:#78442f;font-size:13px;line-height:1.8}.calc-footnote{font-size:10px;color:var(--muted);line-height:1.85;margin:20px 0 0}.time-table{width:100%;border-collapse:collapse;margin-top:29px;font-size:12px}.time-table th,.time-table td{text-align:left;padding:15px 19px;border-bottom:1px solid var(--line);vertical-align:top}.time-table th:first-child,.time-table td:first-child{padding-left:0}.time-table th{font-weight:500}.time-table thead th{font-size:9px;letter-spacing:1.2px;color:#7c6a47}.time-table td{color:var(--muted)}.variants-section{background:#e9eadf;padding:64px 0}.variant-feature{display:grid;grid-template-columns:1.1fr 1fr;gap:61px;background:var(--ink);color:var(--paper);padding:36px 38px;align-items:center}.variant-feature .eyebrow{font-size:9px;letter-spacing:1.7px;color:#d6bb88}.variant-feature h3{font:normal 38px var(--serif);margin:17px 0}.variant-feature p{font-size:12px;line-height:1.9;color:#cbd8bf;margin:0 0 17px}.variant-feature .variant-note{font-size:10px;margin:0;color:#bfcfb1}.start960{margin:0}.start960 .chess-row{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));border:7px solid #0f291b}.chess-row>span{aspect-ratio:1;background:#e1dcc7;display:flex;align-items:center;justify-content:center;color:#fff8dc;font:36px/1 Georgia,serif;-webkit-text-stroke:.7px #305436;text-shadow:0 2px 2px #0005;min-width:0}.chess-row>span:nth-child(odd){background:#819672}.chess-files{display:grid;grid-template-columns:repeat(8,1fr);text-align:center;padding:7px 7px 0;font-size:9px;color:#bfd0b2}.start960 figcaption{font-size:10px;line-height:1.9;color:#c0d0b2;margin-top:17px}.start960 figcaption strong{color:#d9c28f;font-weight:400}.variant-grid{display:grid;grid-template-columns:1fr 1fr;gap:29px;margin-top:29px}.variant-card{background:#f5f3e9;border:1px solid #cbd3bd;padding:30px 31px}.variant-card .eyebrow{font-size:9px;letter-spacing:1.7px;color:#8d744b}.variant-card h3{font:normal 29px var(--serif);margin:17px 0}.variant-card p{font-size:12px;line-height:1.9;color:var(--muted);margin:0 0 16px}.variant-card .variant-fact{border-top:1px solid #cbd3bd;padding-top:17px;font-size:10px;color:#627451;margin:20px 0 0}.modes-faq{padding:67px 0}.faq-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:75px}.faq-layout h2{font:normal 40px/1.15 var(--serif);letter-spacing:-1px;margin:20px 0}.faq-layout .faq-lead{font-size:13px;line-height:1.9;color:var(--muted);max-width:340px}.faq-items details{border-top:1px solid var(--line)}.faq-items details:last-child{border-bottom:1px solid var(--line)}.faq-items summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:18px;font-size:13px;line-height:1.65;padding:19px 0}.faq-items summary::-webkit-details-marker{display:none}.faq-items summary:after{content:'+';font:25px var(--serif);color:#8e754a}.faq-items details[open] summary:after{content:'−'}.faq-items details p{font-size:12px;line-height:1.85;color:var(--muted);margin:0 0 19px}.modes-sources{border-top:1px solid var(--line);padding:20px 0 32px;font-size:11px;color:var(--muted)}.modes-sources summary{cursor:pointer;font-size:12px;color:var(--ink);padding:10px 0}.modes-sources p{max-width:820px;line-height:1.8}.modes-sources a{text-decoration:underline;text-underline-offset:3px}.modes-cta{background:var(--ink);color:var(--paper)}.modes-cta .wrap{display:flex;align-items:center;justify-content:space-between;gap:45px;padding:53px 0}.modes-cta h2{font:normal 40px/1.2 var(--serif);letter-spacing:-1px;margin:20px 0 0}.modes-cta .btn{flex-shrink:0}
@media(max-width:1100px){.modes-hero h1{font-size:60px}.tempo-grid{gap:15px}.tempo-card{padding:24px 19px}.tempo-card h3{font-size:26px}.tempo-time{font-size:39px}.modes-heading,.notation-grid{gap:43px}.clock-layout{gap:25px}.time-inputs{padding:27px}.calc-result{padding:29px}.variant-feature{gap:37px;padding:31px}.chess-row>span{font-size:31px}.faq-layout{gap:44px}}
@media(min-width:821px) and (max-width:1050px){.nav-inner{height:78px}.menu-toggle{display:block}.nav{display:none;position:absolute;top:78px;left:0;right:0;padding:18px 25px 24px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:0 15px 25px #0001}.nav.open{display:flex;flex-direction:column;align-items:stretch;gap:3px}.nav a{padding:12px;font-size:14px}.nav .nav-cta{margin-top:8px}}
@media(max-width:820px){.modes-hero>img{top:auto;bottom:0;width:100%;height:390px;object-position:57% center}.modes-hero:after{background:linear-gradient(180deg,#0c2019 0%,#0c2019 43%,#0c201982 65%,#0c201914 82%,#0c20197a)}.modes-hero .wrap{padding:23px 0 312px;min-height:775px}.breadcrumbs{margin-bottom:29px}.modes-hero h1{font-size:clamp(44px,8vw,61px);letter-spacing:-1.5px;margin:23px 0}.modes-hero .eyebrow{font-size:8px;letter-spacing:1.6px}.modes-lead{font-size:13px;max-width:440px}.modes-hero .hero-actions{gap:21px}.modes-hero .text-link{font-size:11px}.tempo-plaque{right:0;bottom:26px;padding:17px 22px;min-width:231px}.tempo-plaque strong{font-size:40px;margin:6px 0}.tempo-plaque small{font-size:7px}.tempo-plaque span{font-size:9px}.modes-jump .wrap{grid-template-columns:1fr}.modes-jump a{padding:16px 0!important;border-right:0;border-bottom:1px solid var(--line);font-size:12px}.modes-jump small{font-size:21px}.tempo-section{padding:52px 0}.modes-heading{grid-template-columns:1fr;gap:20px;margin-bottom:27px}.modes-heading h2{font-size:35px}.modes-heading>p{font-size:12px;max-width:600px}.tempo-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:19px}.tempo-card{padding:25px}.tempo-card h3{font-size:28px}.tempo-time{font-size:42px}.tempo-card>p{font-size:12px}.tempo-note{font-size:10px}.time-notation{padding:43px 0}.notation-grid{grid-template-columns:1fr;gap:27px}.notation-grid h2{font-size:35px}.notation-grid p{font-size:12px;max-width:600px}.notation-art{max-width:480px;width:100%;justify-self:center}.notation-number strong{font-size:65px}.clock-section{padding:51px 0}.clock-layout{grid-template-columns:1fr;gap:20px}.time-inputs{padding:26px}.time-inputs h3{font-size:26px}.calc-result{padding:29px;min-height:285px}.calc-result h3{font-size:42px}.result-control{font-size:23px}.time-table{font-size:11px}.time-table th,.time-table td{padding:13px 10px}.time-table thead th{font-size:8px;letter-spacing:.5px}.variants-section{padding:46px 0}.variant-feature{grid-template-columns:1fr;gap:27px;padding:28px}.variant-feature h3{font-size:33px}.start960{max-width:470px;width:100%;justify-self:center}.chess-row>span{font-size:35px}.variant-grid{grid-template-columns:1fr;gap:20px;margin-top:20px}.variant-card{padding:26px}.variant-card h3{font-size:28px}.modes-faq{padding:48px 0}.faq-layout{grid-template-columns:1fr;gap:20px}.faq-layout h2{font-size:35px}.faq-layout .faq-lead{max-width:600px;font-size:12px}.faq-items summary{font-size:12px}.modes-sources{padding-bottom:25px}.modes-cta .wrap{display:block;padding:40px 0}.modes-cta h2{font-size:34px;margin-bottom:25px}}
@media(max-width:480px){.tempo-grid{grid-template-columns:1fr}.tempo-card{padding:26px}.tempo-card h3{font-size:30px}.tempo-time{font-size:46px}.tempo-card .time-label{margin-bottom:18px}.tempo-card>p{margin-bottom:20px}.notation-art{gap:23px;padding:28px 18px}.notation-number strong{font-size:59px}.time-inputs{padding:23px}.input-grid{gap:15px}.time-field label{font-size:10px}.time-field input{font-size:28px}.time-presets{gap:7px}.time-presets button{font-size:10px;padding:9px 11px}.time-table{font-size:10px}.time-table th,.time-table td{padding:12px 7px}.variant-feature{padding:25px}.chess-row>span{font-size:27px}.start960 .chess-row{border-width:5px}.modes-hero .hero-actions .btn{font-size:11px}.modes-hero h1{font-size:46px}}
@media print{.site-header,.modes-hero,.modes-jump,.time-inputs,.modes-cta,.footer-map{display:none!important}.tempo-section,.clock-section,.variants-section{padding:25px 0}.tempo-grid{grid-template-columns:repeat(4,1fr)}.tempo-card{padding:15px;break-inside:avoid}.tempo-card h3{font-size:23px}.tempo-time{font-size:32px}.clock-layout{grid-template-columns:1fr}.variant-feature,.variant-card{break-inside:avoid}}