:root{--bg:#07101b;--nav:#08111c;--surface:#0e1a27;--surface-2:#102131;--ink:#f0f7ff;--muted:#adbdcc;--line:#26394a;--cyan:#35d5ff;--cyan-soft:#8ce8ff;--purple:#9a83ff;--green:#80d7b0;--orange:#ffbd73;--danger:#ff8594;--focus:#fff0a6}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,Arial,sans-serif;line-height:1.65}a{color:var(--cyan-soft)}a:hover{color:#fff}button,input,select,textarea{font:inherit}.skip-link{position:absolute;top:8px;left:-9999px;background:var(--cyan);color:#001018;padding:10px 15px;z-index:90;font-weight:800}.skip-link:focus{left:8px}.site-nav{position:sticky;top:0;background:rgba(8,17,28,.97);border-bottom:1px solid var(--line);z-index:50;backdrop-filter:blur(12px)}.nav-wrap{width:min(1160px,100% - 40px);min-height:68px;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:18px}.brand{color:var(--ink);font-weight:900;letter-spacing:-.04em;text-decoration:none;font-size:1.2rem}.brand .mark{color:var(--cyan);margin-right:5px}.nav-links{display:flex;gap:21px;list-style:none;margin:0;padding:0;align-items:center}.nav-links a{color:var(--muted);text-decoration:none;font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.075em}.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--cyan-soft)}.nav-toggle{display:none;background:transparent;color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:7px 10px;font-size:1.1rem}.nav-mobile{display:none}main{min-height:68vh}.container{width:min(1040px,100% - 40px);margin:auto}.narrow{width:min(760px,100% - 40px);margin:auto}.hero{padding:78px 0 55px;background:radial-gradient(circle at 50% 0,rgba(53,213,255,.13),transparent 48%);text-align:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--cyan-soft);font-size:.75rem;font-weight:900;letter-spacing:.14em;text-transform:uppercase}.hero h1{font-size:clamp(2.4rem,6vw,4.8rem);line-height:1.04;letter-spacing:-.055em;max-width:850px;margin:16px auto}.hero h1 em{color:var(--cyan);font-style:normal}.hero p{color:var(--muted);font-size:1.06rem;max-width:700px;margin:0 auto}.cta-row{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:28px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:47px;padding:11px 19px;border-radius:7px;border:1px solid transparent;font-weight:850;text-decoration:none;cursor:pointer;font-size:.88rem;letter-spacing:.01em}.button.primary{color:#00131b;background:var(--cyan)}.button.primary:hover{background:#8be8ff;color:#00131b}.button.secondary{border-color:var(--cyan);color:var(--cyan-soft);background:transparent}.button.secondary:hover{background:rgba(53,213,255,.1);color:#fff}.section{padding:66px 0;border-top:1px solid var(--line)}.section-heading{max-width:740px;margin:0 auto 31px;text-align:center}.section-heading h2{font-size:clamp(1.9rem,3vw,2.75rem);line-height:1.15;letter-spacing:-.04em;margin:7px 0 12px}.section-heading p{color:var(--muted);margin:0}.grid{display:grid;gap:18px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:25px}.card h3{margin:0 0 10px;font-size:1.05rem}.card p{margin:0;color:var(--muted);font-size:.94rem}.card a{display:inline-block;font-size:.88rem;font-weight:850;margin-top:15px}.card .icon{display:block;font-size:1.6rem;margin-bottom:13px}.tool-shell{background:var(--surface);border:1px solid rgba(53,213,255,.4);border-radius:16px;padding:clamp(20px,4.5vw,44px);box-shadow:0 22px 60px rgba(0,0,0,.22)}.tool-tabs{display:flex;gap:7px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:24px}.tool-tab{background:transparent;border:1px solid var(--line);border-radius:7px;color:var(--muted);padding:10px 13px;cursor:pointer;font-weight:800;font-size:.85rem}.tool-tab.active,.tool-tab:hover{border-color:var(--cyan);background:rgba(53,213,255,.1);color:var(--cyan-soft)}.tool-panel{display:none}.tool-panel.active{display:block}.tool-panel h2{margin:0 0 7px;font-size:1.55rem;letter-spacing:-.035em}.tool-panel .intro{color:var(--muted);margin:0 0 20px}.field-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.field{display:grid;gap:7px}.field label{color:var(--cyan-soft);font-weight:850;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em}.field input,.field select{width:100%;background:#08121d;border:1px solid var(--line);border-radius:7px;padding:13px;color:var(--ink)}.field input:focus,.field select:focus{outline:3px solid rgba(140,232,255,.28);border-color:var(--cyan)}.calc-result{margin-top:22px;padding:23px;border-radius:10px;background:#08121d;border:1px solid var(--line)}.calc-result .result-label{color:var(--muted);text-transform:uppercase;letter-spacing:.12em;font-size:.75rem;font-weight:850}.calc-result .result-value{display:block;color:var(--cyan);font-size:clamp(2rem,5vw,3.2rem);font-weight:900;letter-spacing:-.06em;line-height:1.05;margin:4px 0 9px}.calc-result p{margin:0;color:var(--muted);font-size:.92rem}.formula{font-family:'IBM Plex Mono',monospace;background:rgba(154,131,255,.1);border:1px solid rgba(154,131,255,.32);color:#d8ceff;border-radius:7px;padding:13px 15px;margin:16px 0 0;font-size:.88rem;overflow-wrap:anywhere}.calc-note{font-size:.83rem;color:var(--muted);margin:14px 0 0}.copy-summary{margin-top:14px;background:transparent;color:var(--cyan-soft);border:0;text-decoration:underline;font-weight:800;cursor:pointer;padding:0}.notice{border-left:3px solid var(--orange);background:rgba(255,189,115,.08);padding:17px 19px;margin:25px 0;color:#f6e6d3}.notice p{margin:0}.prose{font-size:1.02rem}.prose h2{font-size:clamp(1.65rem,3vw,2.3rem);letter-spacing:-.04em;line-height:1.2;margin:43px 0 13px}.prose h3{font-size:1.14rem;color:var(--cyan-soft);margin:30px 0 8px}.prose p,.prose li{color:#dbe7f2}.prose li{margin:8px 0}.prose ul,.prose ol{padding-left:23px}.prose strong{color:#fff}.article-header{padding:66px 0 30px;border-bottom:1px solid var(--line);background:radial-gradient(circle at 20% 0,rgba(154,131,255,.12),transparent 45%)}.crumb{font-size:.82rem;font-weight:800;text-decoration:none}.article-header h1{font-size:clamp(2.2rem,5vw,4rem);line-height:1.08;letter-spacing:-.055em;margin:17px 0 14px}.dek{max-width:760px;color:var(--muted);font-size:1.07rem;margin:0}.byline{font-size:.86rem;color:var(--muted);margin:20px 0 0}.byline strong{color:var(--ink)}.content{padding:42px 0 70px}.table-wrap{border:1px solid var(--line);border-radius:9px;overflow-x:auto;margin:22px 0}table{width:100%;border-collapse:collapse;min-width:590px;background:var(--surface)}th,td{text-align:left;padding:13px 15px;border-bottom:1px solid var(--line);font-size:.9rem}th{font-size:.76rem;text-transform:uppercase;letter-spacing:.07em;color:var(--cyan-soft)}tr:last-child td{border-bottom:0}.worksheet{margin:29px 0;background:var(--surface);border:1px solid var(--line);border-radius:11px;padding:23px}.worksheet h2{margin-top:0}.worksheet textarea{min-height:140px;width:100%;resize:vertical;border:1px solid var(--line);background:#08121d;border-radius:7px;color:var(--ink);padding:14px;line-height:1.5}.timezone-tool{background:var(--surface);border:1px solid rgba(53,213,255,.4);border-radius:16px;padding:clamp(21px,4vw,40px)}.city-controls{display:grid;grid-template-columns:1fr 1fr;gap:16px}.city-wrap{position:relative}.city-wrap input{width:100%;background:#08121d;border:1px solid var(--line);border-radius:7px;color:var(--ink);padding:13px}.city-wrap input:focus{outline:3px solid rgba(140,232,255,.28);border-color:var(--cyan)}.city-suggestions{position:absolute;z-index:15;left:0;right:0;top:100%;padding:5px;margin:3px 0 0;list-style:none;background:#122436;border:1px solid var(--line);border-radius:7px;max-height:230px;overflow:auto}.city-suggestions:empty{display:none}.city-suggestions button{display:block;width:100%;padding:10px 11px;border:0;background:transparent;color:var(--ink);text-align:left;cursor:pointer;border-radius:5px}.city-suggestions button:hover{background:rgba(53,213,255,.12)}.city-suggestions small{color:var(--muted)}.time-results{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:24px}.time-card{background:#08121d;border:1px solid var(--line);border-radius:9px;padding:20px}.time-card .city-name{color:var(--cyan-soft);font-weight:900}.time-card time{font-size:clamp(1.6rem,4vw,2.5rem);font-weight:900;display:block;letter-spacing:-.04em;margin-top:5px}.time-card p{color:var(--muted);font-size:.85rem;margin:3px 0 0}.overlap{margin-top:16px;background:rgba(128,215,176,.08);border:1px solid rgba(128,215,176,.38);border-radius:9px;padding:18px}.overlap h3{color:var(--green);font-size:1rem;margin:0 0 5px}.overlap p{color:#d9f1e4;margin:0;font-size:.91rem}.tool-meta{color:var(--muted);font-size:.85rem;margin:15px 0 0}.form-card{max-width:720px;margin:auto;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:clamp(24px,5vw,44px)}.form-field{display:grid;gap:7px;margin:18px 0}.form-field label{font-weight:850;font-size:.9rem}.form-field input,.form-field textarea{width:100%;background:#08121d;border:1px solid var(--line);border-radius:7px;padding:13px;color:var(--ink)}.form-field textarea{resize:vertical;min-height:150px}.form-field input:focus,.form-field textarea:focus{outline:3px solid rgba(140,232,255,.28);border-color:var(--cyan)}.honeypot{position:absolute;left:-10000px;opacity:0;pointer-events:none}.site-footer{background:#050b12;border-top:1px solid var(--line);padding:40px 0}.footer-wrap{width:min(1160px,100% - 40px);margin:auto;display:grid;grid-template-columns:1.4fr 1fr;gap:32px}.site-footer p{color:var(--muted);font-size:.86rem;margin:10px 0}.footer-links{display:flex;justify-content:flex-end;align-content:start;gap:12px 18px;flex-wrap:wrap}.footer-links a{color:var(--muted);font-size:.8rem;text-decoration:none}.footer-links a:hover{color:var(--cyan-soft)}.footer-bottom{width:min(1160px,100% - 40px);margin:25px auto 0;padding-top:20px;border-top:1px solid var(--line);color:#7e91a4;font-size:.75rem}.footer-bottom a{color:#9fb5c9}.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(1px,1px,1px,1px);white-space:nowrap}
@media(max-width:800px){.nav-wrap{width:min(100% - 28px,1160px);min-height:60px}.nav-links{display:none}.nav-toggle{display:block}.nav-mobile{position:absolute;top:60px;left:0;right:0;background:#08111c;border-bottom:1px solid var(--line);padding:8px 14px 15px;box-shadow:0 15px 28px rgba(0,0,0,.4)}.nav-mobile.open{display:grid}.nav-mobile a{padding:12px 4px;border-bottom:1px solid var(--line);color:var(--muted);font-size:.85rem;font-weight:850;text-decoration:none;text-transform:uppercase;letter-spacing:.06em}.nav-mobile a:last-child{border-bottom:0}.container,.narrow{width:min(100% - 28px,1040px)}.hero{padding:55px 0 42px}.section{padding:48px 0}.grid.two,.grid.three,.field-grid,.city-controls,.time-results{grid-template-columns:1fr}.cta-row{display:grid}.button{width:100%}.tool-shell,.timezone-tool{padding:23px 17px}.tool-tabs{display:grid;grid-template-columns:1fr}.tool-tab{width:100%}.footer-wrap{width:min(100% - 28px,1160px);grid-template-columns:1fr}.footer-links{justify-content:flex-start}.footer-bottom{width:min(100% - 28px,1160px)}}