:root{--ink:#102746;--muted:#58708f;--blue:#0879ef;--navy:#0b315a;--line:#cbdcf0;--panel:#f3f7fc;--green:#18a66f;--yellow:#ffd85a}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f4f7fb;color:var(--ink);font:16px/1.5 Inter,Arial,sans-serif}.skip-link{position:fixed;left:12px;top:-60px;z-index:100;padding:10px 14px;background:#fff;color:#064f9a;border-radius:8px}.skip-link:focus{top:12px}.calculator-global-header{height:74px;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1180px)/2));background:#fff;border-bottom:1px solid #d9e4f1;position:sticky;top:0;z-index:20}.calculator-global-brand img{display:block}.calculator-global-nav{display:flex;gap:24px}.calculator-global-nav a,.breadcrumbs a,.article a{color:#0869ce;text-decoration:none}.page{max-width:1180px;margin:auto;padding:24px 20px 80px}.breadcrumbs{font-size:14px;color:var(--muted);display:flex;gap:8px;margin-bottom:22px}.page-intro{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:end;margin-bottom:28px}.eyebrow,.result-kicker{font-size:12px;letter-spacing:.13em;font-weight:900;color:#0879ef;margin:0 0 8px}.page-intro h1,.calculator-head h2,.guide h2,.article h2,.faq h2,.method h2{margin:0;line-height:1.08}.page-intro h1{font-size:clamp(38px,5vw,64px);letter-spacing:-.04em}.page-intro>p{font-size:19px;color:var(--muted);margin:0}.notice{padding:12px 16px;background:#e9f7ef;color:#155d3c;border:1px solid #a9dfc4;border-radius:12px;margin-bottom:16px}.calculator-shell,.guide,.article,.faq,.method{background:#fff;border:1px solid #d5e2f0;border-radius:30px;box-shadow:0 16px 44px rgba(19,52,91,.07);margin-bottom:28px}.calculator-shell{padding:20px}.calculator-head{display:flex;justify-content:space-between;align-items:center;padding:4px 4px 20px}.calculator-head h2{font-size:32px}.button-row{display:flex;gap:10px}.button-row button,.result-actions button{background:#fff;color:#0c559d;border:1px solid #abc9e9;padding:11px 16px;border-radius:12px;font-weight:800}.calculator-layout{display:grid;grid-template-columns:1.03fr .97fr;gap:18px}.controls{background:#eef4fa;border-radius:24px;padding:20px}.control-section+.control-section{border-top:1px solid #ceddec;margin-top:18px;padding-top:18px}.section-title h3{margin:0 0 2px;font-size:20px}.section-title p{margin:0 0 14px;color:var(--muted);font-size:14px}.choice-row{display:grid;gap:8px}.choice-row.two{grid-template-columns:repeat(2,1fr)}.choice-row.units{grid-template-columns:repeat(3,1fr);margin-top:12px}.choice-row button{min-height:48px;border:1px solid #b9cee4;border-radius:13px;background:#fff;color:#294969;font-weight:800;padding:8px}.choice-row button[aria-pressed=true]{border:2px solid var(--blue);background:#e3f1ff;color:#0758a6}.date-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.field{display:grid;gap:7px;font-weight:800}.field input{width:100%;height:52px;border:1px solid #aac7e5;border-radius:13px;background:#fff;color:var(--ink);font:700 17px/1.2 inherit;padding:0 12px}.field input:focus,.choice-row button:focus-visible,.button-row button:focus-visible,.result-actions button:focus-visible,.text-button:focus-visible,.swap:focus-visible,.green-card button:focus-visible{outline:3px solid rgba(8,121,239,.28);outline-offset:2px}.field input[aria-invalid=true]{border:2px solid #d92c39}.text-button{justify-self:start;border:0;background:none;color:#0869ce;text-decoration:underline;padding:2px 0}.swap{margin-top:10px;border:0;background:none;color:#0869ce;font-weight:800}.amount-field{margin-top:12px;max-width:220px}.boundary label{display:flex;gap:10px;align-items:center;margin:9px 0;font-weight:700}.boundary input{width:20px;height:20px;accent-color:var(--blue)}.error-summary{border:1px solid #e09a9f;background:#fff3f3;color:#83232b;border-radius:14px;padding:12px 14px;margin-bottom:16px}.error-summary strong{display:block}.error-summary ul{margin:6px 0 0;padding-left:18px}.error-summary button{border:0;background:none;color:#9d1824;text-decoration:underline;text-align:left;padding:0}.results{background:linear-gradient(145deg,#082b51,#0e4c83);color:#fff;border-radius:24px;padding:24px;min-height:540px;display:flex;flex-direction:column}.result-heading h2{margin:0;font-size:30px}.result-kicker{color:#b7d7ff}.result-placeholder{margin:auto 0;color:#cfe0f4}.result-placeholder span{font-size:12px;font-weight:900;letter-spacing:.1em}.result-placeholder h3{font-size:28px;margin:8px 0}.result-ready{margin-top:20px}.result-badge{display:inline-flex;border:1px solid #60b7ef;border-radius:999px;padding:5px 10px;font-size:12px;font-weight:900;color:#aee5ff}.result-ready>h3{margin:14px 0 0;font-size:18px}.result-value{display:block;font-size:76px;line-height:1;font-weight:900;letter-spacing:-.05em;margin:2px 0 18px}.result-date{display:block;font-size:clamp(36px,5vw,58px);line-height:1.05;font-weight:900;letter-spacing:-.035em;margin:8px 0 22px}.metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.metrics div{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:13px;padding:10px}.metrics span{display:block;font-size:12px;color:#c7d9ee}.metrics b{font-size:17px}.green-card{background:#075665;border:1px solid #5ee5a3;border-radius:15px;padding:14px;margin-top:14px}.green-card h3{margin:0 0 4px;font-size:17px;color:#baffd8}.green-card p{margin:0 0 10px}.green-card button{border:1px solid #7cf1b6;background:#11755e;color:#fff;border-radius:11px;padding:10px 12px;font-weight:900}.result-ready details{border:1px solid rgba(255,255,255,.28);border-radius:13px;margin-top:10px;padding:12px}.result-ready summary{font-weight:900;cursor:pointer}.result-ready details p{color:#d4e3f3}.result-actions{margin-top:auto;padding-top:16px;border-top:1px solid rgba(255,255,255,.2)}.result-actions button{width:100%;background:#135a91;color:#fff;border-color:#65a7dc}.result-actions p{font-size:13px;color:#cbdcf0;margin:9px 0 0}.guide,.article,.faq,.method{padding:42px 46px}.guide h2,.article>header h2,.faq h2,.method h2{font-size:42px}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}.guide article{background:#f3f7fb;border:1px solid #d1dfed;border-radius:18px;padding:20px}.guide article span{color:#0879ef;font-weight:900;font-size:13px}.guide article h3{margin:8px 0 5px}.guide article p,.article p,.method p{color:#405d7d}.article>header{max-width:850px;margin-bottom:30px}.article>header>p:last-child{font-size:18px}.article section{border-top:1px solid #d8e4f0;padding-top:22px;margin-top:22px}.article section h2{font-size:28px}.note{background:#fff7db;border-left:3px solid #eeb500;padding:14px 16px;border-radius:0 12px 12px 0}.faq details{border-top:1px solid #d6e3ef;padding:18px 4px}.faq details:first-of-type{margin-top:22px}.faq summary{font-size:18px;font-weight:900;cursor:pointer}.faq details p{color:#45617f;margin-bottom:0}.method .updated{background:#edf5fd;border-radius:14px;padding:14px}.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}[hidden]{display:none!important}@media(max-width:850px){.page-intro{grid-template-columns:1fr;gap:12px}.calculator-layout{grid-template-columns:1fr}.results{min-height:0}.guide-grid{grid-template-columns:1fr}.calculator-global-nav a:first-child{display:none}}@media(max-width:560px){.calculator-global-header{height:62px;padding:0 16px}.calculator-global-brand img{width:140px}.page{padding:18px 10px 68px}.page-intro h1{font-size:38px}.page-intro>p{font-size:16px}.calculator-shell{padding:8px;border-radius:22px}.calculator-head{align-items:flex-start;gap:12px;padding:12px}.calculator-head h2{font-size:25px}.button-row{flex-direction:column}.button-row button{padding:7px 10px}.controls,.results{border-radius:18px;padding:15px}.choice-row.units{grid-template-columns:repeat(2,1fr)}.date-grid{grid-template-columns:1fr}.result-value{font-size:64px}.metrics{grid-template-columns:1fr 1fr}.guide,.article,.faq,.method{padding:28px 20px;border-radius:22px}.guide h2,.article>header h2,.faq h2,.method h2{font-size:32px}}@media(max-width:350px){.choice-row.two,.choice-row.units,.metrics{grid-template-columns:1fr}.calculator-global-nav{display:none}}@media print{.calculator-global-header,.breadcrumbs,.page-intro,.calculator-head,.controls,.guide,.article,.faq,.method,.result-actions{display:none!important}.page{padding:0}.calculator-shell{border:0;box-shadow:none;padding:0}.calculator-layout{display:block}.results{min-height:0;color:#000;background:#fff;border:1px solid #999}.result-kicker,.result-badge{color:#000}.green-card{color:#000;background:#fff;border-color:#777}}

/* UI and accessibility refinements after the public visual review. */
html{scroll-padding-bottom:112px}
button,a,summary{touch-action:manipulation}
.page :is(a,button,input,summary):focus-visible,.calculator-global-header a:focus-visible{outline:3px solid rgba(8,121,239,.34);outline-offset:3px;border-radius:8px}
.calculator-global-nav a{min-height:44px;display:inline-flex;align-items:center}
.page :is(h1,h2,h3){text-wrap:balance}
.button-row button,.result-actions button,.green-card button{min-height:44px}
.choice-row button,.button-row button,.result-actions button,.green-card button,.swap,.text-button{cursor:pointer}
.choice-row button:hover,.button-row button:hover,.result-actions button:hover,.green-card button:hover{filter:brightness(.98)}
.field-head{display:flex;align-items:center;justify-content:space-between;gap:12px;font-weight:800}
.text-button{min-height:44px;padding:8px 2px;display:inline-flex;align-items:center}
.swap{min-height:44px;padding:8px 2px;display:inline-flex;align-items:center}
.boundary label{min-height:44px;margin:0;padding:8px 0;cursor:pointer}
.result-value,.result-date,.metrics b{font-variant-numeric:tabular-nums}
.result-ready summary{box-sizing:border-box;min-height:44px;padding:10px 0}
.faq details{padding:0 4px}
.faq summary{box-sizing:border-box;min-height:56px;padding:14px 0}
.faq details p{margin-top:0;padding-bottom:18px}
body:has(.gcc-cookie-banner.is-visible) .gcf-action-dock,body:has(.gcc-cookie-banner.is-visible) .gcf-action-toast{visibility:hidden;opacity:0;pointer-events:none}
body.gcf-action-dock-ready:has(.gcc-cookie-banner.is-visible) .gcc-cookie-banner{bottom:18px}
@media(max-width:640px){body.gcf-action-dock-ready:has(.gcc-cookie-banner.is-visible) .gcc-cookie-banner{bottom:8px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body .gcc-cookie-banner .gcc-cookie-actions :is(a,button){min-height:44px!important}

/* Symmetric date controls. */
.between-fields:not([hidden]){display:contents}
.date-input-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;align-items:stretch}
.date-input-row .text-button{min-width:82px;min-height:52px;padding:0 12px;border:1px solid #aac7e5;border-radius:13px;background:#fff;text-decoration:none;justify-content:center;font-weight:800}
.date-grid .swap{grid-column:1/-1;justify-self:center;min-width:190px;margin:2px 0 0;padding:8px 16px;border:1px solid #9fc6ec;border-radius:12px;background:#e3f1ff;text-decoration:none;justify-content:center}
.date-grid + #shiftFields:not([hidden]){margin-top:14px}
@media(max-width:560px){.date-input-row .text-button{min-width:86px}.date-grid .swap{width:100%}}

/* Clear feedback after exchanging the two dates. */
.date-grid.is-swapping>.date-field:first-child .date-picker-trigger{animation:date-swap-start .58s cubic-bezier(.2,.8,.2,1)}
.date-grid.is-swapping .date-field-end .date-picker-trigger{animation:date-swap-end .58s cubic-bezier(.2,.8,.2,1)}
.date-grid.is-swapping .swap{animation:date-swap-button .58s ease-out}
@keyframes date-swap-start{0%{transform:translateX(0);background:#fff;box-shadow:none}42%{transform:translateX(10px);background:#dff0ff;box-shadow:0 0 0 4px rgba(8,121,239,.16)}100%{transform:translateX(0);background:#fff;box-shadow:none}}
@keyframes date-swap-end{0%{transform:translateX(0);background:#fff;box-shadow:none}42%{transform:translateX(-10px);background:#dff0ff;box-shadow:0 0 0 4px rgba(8,121,239,.16)}100%{transform:translateX(0);background:#fff;box-shadow:none}}
@keyframes date-swap-button{0%,100%{background:#e3f1ff}42%{background:#bfe0ff;box-shadow:0 0 0 4px rgba(8,121,239,.12)}}
@media(max-width:560px){@keyframes date-swap-start{0%{transform:translateY(0);background:#fff;box-shadow:none}42%{transform:translateY(6px);background:#dff0ff;box-shadow:0 0 0 4px rgba(8,121,239,.16)}100%{transform:translateY(0);background:#fff;box-shadow:none}}@keyframes date-swap-end{0%{transform:translateY(0);background:#fff;box-shadow:none}42%{transform:translateY(-6px);background:#dff0ff;box-shadow:0 0 0 4px rgba(8,121,239,.16)}100%{transform:translateY(0);background:#fff;box-shadow:none}}}
@media(prefers-reduced-motion:reduce){.date-grid.is-swapping>.date-field:first-child .date-picker-trigger,.date-grid.is-swapping .date-field-end .date-picker-trigger,.date-grid.is-swapping .swap{animation:none;background:#dff0ff;box-shadow:0 0 0 3px rgba(8,121,239,.14)}}

/* Branded calendar: replaces the browser-dependent native date popup. */
.date-field{position:relative;min-width:0}
.date-picker-trigger{width:100%;height:52px;min-width:0;display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid #aac7e5;border-radius:13px;background:#fff;color:var(--ink);font:700 17px/1.2 inherit;padding:0 14px;cursor:pointer;text-align:left;font-variant-numeric:tabular-nums}
.date-picker-trigger:hover{border-color:#6ca9e5;background:#fbfdff}
.date-picker-trigger[aria-expanded=true]{border:2px solid var(--blue);box-shadow:0 0 0 3px rgba(8,121,239,.12)}
.date-picker-trigger[aria-invalid=true]{border:2px solid #d92c39}
.date-picker-trigger.is-empty{color:var(--muted)}
.calendar-icon{position:relative;width:18px;height:17px;flex:0 0 18px;border:2px solid currentColor;border-radius:4px;opacity:.8}
.calendar-icon::before{content:'';position:absolute;left:-2px;right:-2px;top:3px;border-top:2px solid currentColor}
.calendar-icon::after{content:'';position:absolute;left:3px;right:3px;top:-4px;height:5px;border-left:2px solid currentColor;border-right:2px solid currentColor}
.date-popover{position:absolute;top:calc(100% + 8px);left:0;z-index:100;width:322px;padding:14px;background:#fff;border:1px solid #bdd3e9;border-radius:18px;box-shadow:0 18px 44px rgba(16,39,70,.2)}
.date-field-end .date-popover{left:auto;right:0}
.calendar-head{display:grid;grid-template-columns:44px 1fr 44px;align-items:center;gap:6px;margin-bottom:8px}
.calendar-head strong{text-align:center;font-size:16px;text-transform:capitalize}
.calendar-nav{width:44px;height:44px;border:0;border-radius:12px;background:#edf5fd;color:#0869ce;font-size:22px;line-height:1;cursor:pointer}
.calendar-nav:hover{background:#dceeff}
.calendar-weekdays,.calendar-days{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:3px}
.calendar-weekdays{margin-bottom:4px;color:#6b819b;font-size:12px;font-weight:800;text-align:center}
.calendar-weekdays span{padding:5px 0}
.calendar-day{aspect-ratio:1;min-width:0;border:0;border-radius:11px;background:transparent;color:#193957;font:700 14px/1 inherit;cursor:pointer;font-variant-numeric:tabular-nums}
.calendar-day:hover{background:#e5f2ff;color:#0758a6}
.calendar-day.is-weekend:not(.is-selected){color:#c44d59}
.calendar-day.is-other{color:#9aabbd;opacity:.68}
.calendar-day.is-selected{background:var(--blue);color:#fff;box-shadow:0 4px 12px rgba(8,121,239,.28)}
.calendar-day.is-today:not(.is-selected){box-shadow:inset 0 0 0 2px #55a6ed;color:#0758a6}
.calendar-day:disabled{opacity:.3;cursor:not-allowed}
.calendar-footer{display:flex;justify-content:space-between;gap:8px;margin-top:10px;padding-top:10px;border-top:1px solid #dce7f2}
.calendar-footer button{min-height:42px;border:0;border-radius:11px;background:#edf5fd;color:#0869ce;font-weight:800;padding:8px 12px;cursor:pointer}
.calendar-footer button:first-child{background:#0879ef;color:#fff}
@media(max-width:560px){.date-popover,.date-field-end .date-popover{left:0;right:auto;width:min(322px,calc(100vw - 50px))}.calendar-day{min-height:37px}.calendar-head{grid-template-columns:42px 1fr 42px}}
@media(max-width:350px){.date-popover,.date-field-end .date-popover{width:calc(100vw - 40px);padding:10px}.calendar-day{min-height:35px;border-radius:9px}.calendar-weekdays,.calendar-days{gap:2px}}

/* Wordstat-backed quick date shifts. */
.quick-shift{margin-top:14px}
.quick-shift>span{display:block;margin-bottom:7px;color:#405d7d;font-size:13px;font-weight:700}
.quick-days{display:grid;grid-template-columns:repeat(7,minmax(44px,1fr));gap:6px}
.quick-days button{min-width:0;min-height:44px;border:1px solid #abc9e9;border-radius:11px;background:#fff;color:#0758a6;font-weight:900;cursor:pointer;font-variant-numeric:tabular-nums}
.quick-days button:hover{background:#edf6ff;border-color:#78afe5}
.quick-days button[aria-pressed=true]{border:2px solid var(--blue);background:#e3f1ff;color:#064f9a}
@media(max-width:560px){.quick-days{grid-template-columns:repeat(4,minmax(52px,1fr))}}

/* Weekday, ordinal date and a compact visual calendar for the calculated period. */
.result-weekday{display:block;margin:-14px 0 18px;color:#bfe0ff;font-size:15px;font-weight:800;text-transform:capitalize}
.date-facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:12px}
.date-fact{min-width:0;padding:11px 12px;border:1px solid rgba(255,255,255,.22);border-radius:13px;background:rgba(255,255,255,.08)}
.date-fact span,.date-fact small{display:block;color:#c7d9ee;font-size:12px}
.date-fact b{display:block;margin:3px 0;font-size:15px;line-height:1.28;text-transform:capitalize}
.period-calendar{padding:0!important;overflow:hidden}
.period-calendar>summary{padding:12px!important;list-style-position:inside}
.period-calendar[open]>summary{border-bottom:1px solid rgba(255,255,255,.22)}
.period-calendar-body{padding:12px;background:#f4f8fc;color:var(--ink)}
.period-legend{display:flex;flex-wrap:wrap;gap:8px 14px;margin-bottom:12px;color:#405d7d;font-size:12px;font-weight:800}
.period-legend span{display:inline-flex;align-items:center;gap:6px}
.period-legend i{width:17px;height:17px;border-radius:5px;display:inline-block}
.legend-boundary{background:#e3f1ff;box-shadow:inset 0 0 0 2px var(--blue)}
.legend-range{background:#bfe9d3}
.period-omitted{margin:0 0 12px!important;padding:9px 10px;border-radius:10px;background:#fff3ca;color:#6b5100!important;font-size:12px}
.period-months{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}
.period-month{min-width:0;padding:10px;border:1px solid #c8daeb;border-radius:13px;background:#fff}
.period-month h4{margin:0 0 7px;text-align:center;font-size:14px;text-transform:capitalize}
.period-weekdays,.period-days{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:2px}
.period-weekdays{margin-bottom:3px;color:#6b819b;font-size:10px;font-weight:800;text-align:center}
.period-day{display:grid;place-items:center;min-width:0;aspect-ratio:1;border-radius:6px;color:#25425f;font-size:11px;font-weight:800;font-variant-numeric:tabular-nums}
.period-day.is-weekend:not(.is-in-range):not(.is-boundary){color:#bd4d58}
.period-day.is-in-range{background:#bfe9d3;color:#174d36}
.period-day.is-boundary{background:#e3f1ff;color:#064f9a;box-shadow:inset 0 0 0 2px var(--blue)}
.period-day.is-empty{visibility:hidden}
@media(max-width:560px){.date-facts,.period-months{grid-template-columns:1fr}.period-calendar-body{padding:10px}.period-month{padding:9px}.period-day{font-size:12px}}
@media(max-width:350px){.date-facts{grid-template-columns:1fr}.period-calendar-body{padding:8px}.period-month{padding:7px}.period-day{font-size:11px}}
@media print{.period-calendar{display:none}.date-fact{border-color:#999;background:#fff}.result-weekday,.date-fact span,.date-fact small{color:#222}}


/* Index of Wordstat-backed date scenario pages. */
.scenario-index{padding:42px 46px;margin-bottom:28px;border:1px solid #d5e2f0;border-radius:30px;background:#fff;box-shadow:0 16px 44px rgba(19,52,91,.07)}
.scenario-index h2{margin:0;font-size:42px;line-height:1.08}.scenario-index>p:not(.eyebrow){max-width:830px;color:#405d7d;font-size:18px}.scenario-index h3{margin:24px 0 10px;font-size:18px}.scenario-index-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:9px}.scenario-index-grid a{display:flex;align-items:center;gap:10px;min-width:0;min-height:58px;padding:9px 11px;border:1px solid #c5d9ed;border-radius:14px;background:#f7faff;color:#193957;text-decoration:none}.scenario-index-grid a:hover{border-color:#72ade7;background:#eaf5ff}.scenario-index-grid b{display:grid;place-items:center;min-width:42px;height:38px;border-radius:10px;background:#0879ef;color:#fff}.scenario-index-grid span{font-size:13px;font-weight:800;line-height:1.2}.scenario-index-grid.backward b{background:#0f6c89}
@media(max-width:850px){.scenario-index-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:560px){.scenario-index{padding:28px 20px;border-radius:22px}.scenario-index h2{font-size:32px}.scenario-index>p:not(.eyebrow){font-size:16px}.scenario-index-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.scenario-index-grid a{min-height:54px}.scenario-index-grid b{min-width:38px;height:36px}}