:root{
  --bg:#FFFFFF;
  --bg2:#F5F5F7;
  --bg3:#E8E8ED;
  --glass:rgba(255,255,255,0.82);

  --ink:#1D1D1F;
  --ink2:#3A3A3C;
  --ink3:#6E6E73;
  --ink4:#AEAEB2;
  --ink5:#D1D1D6;

  --red:#D70015;
  --red2:#E8002A;
  --red3:#FF3347;
  --red-dim:rgba(215,0,21,0.09);
  --red-glow:rgba(215,0,21,0.18);

  --rule:rgba(0,0,0,0.07);
  --rule2:rgba(0,0,0,0.04);
  --shadow-sm:0 1px 8px rgba(0,0,0,0.05),0 0 0 0.5px rgba(0,0,0,0.04);
  --shadow:0 4px 24px rgba(0,0,0,0.07),0 0 0 0.5px rgba(0,0,0,0.05);
  --shadow-lg:0 12px 48px rgba(0,0,0,0.09),0 0 0 0.5px rgba(0,0,0,0.05);
  --ease:cubic-bezier(0.25,0.1,0.25,1);

  --serif:'Syne',sans-serif;
  --sans:'Figtree',sans-serif;
  --mono:'JetBrains Mono',monospace;
  --r:14px;
  --r-sm:8px;
  --r-lg:20px;
  --r-pill:100px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-weight:400;line-height:1.6;overflow-x:hidden;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;}

/* ── NAV: Apple glassmorphism ── */
.top-band{display:none;}
.mast{background:var(--glass);backdrop-filter:saturate(200%) blur(24px);-webkit-backdrop-filter:saturate(200%) blur(24px);border-bottom:0.5px solid rgba(0,0,0,0.09);position:sticky;top:0;z-index:200;}
.mast-logo-link{text-decoration:none;display:inline-flex;align-items:center;gap:9px;flex-shrink:0;}
.mast-inner{max-width:1360px;margin:0 auto;padding:0 clamp(16px,3vw,64px);display:flex;align-items:center;justify-content:space-between;height:56px;gap:16px;}
.mast-nav{display:flex;align-items:center;gap:2px;flex-wrap:nowrap;overflow:hidden;}
.mast-nav a{font-family:var(--sans);font-size:0.75rem;font-weight:500;color:var(--ink3);padding:5px 10px;border-radius:var(--r-sm);transition:all .2s var(--ease);white-space:nowrap;}
.mast-nav a:hover{color:var(--ink);background:var(--bg2);}
.mast-nav a.active{color:var(--red);background:var(--red-dim);}

/* ── PAGE WRAPPER ── */
.pw{max-width:1360px;margin:0 auto;padding:0 clamp(20px,4vw,64px);}

/* ── AD SLOT ── */
.ad{background:var(--bg2);border-radius:var(--r);padding:20px;text-align:center;font-size:.58rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--ink4);margin:24px 0;}

/* ── FEATURES BAND (dark) ── */
.fb{background:var(--ink);padding:clamp(48px,6vw,80px) clamp(20px,4vw,64px);}
.fb-inner{max-width:1360px;margin:0 auto;}
.fb-label{font-size:.62rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--red3);margin-bottom:40px;display:flex;align-items:center;gap:10px;opacity:.7;}
.fb-label::after{content:'';flex:1;height:.5px;background:rgba(255,255,255,.1);}
.fb-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.fb-cell{background:rgba(255,255,255,.04);border-radius:var(--r-lg);padding:28px 24px;transition:background .25s var(--ease),transform .25s var(--ease);border:.5px solid rgba(255,255,255,.06);}
.fb-cell:hover{background:rgba(255,255,255,.07);transform:translateY(-2px);}
.fb-n{font-family:var(--mono);font-size:1.05rem;font-weight:500;color:var(--red3);opacity:.6;margin-bottom:14px;}
.fb-t{font-family:var(--serif);font-size:1rem;font-weight:600;color:white;margin-bottom:8px;letter-spacing:-.01em;}
.fb-d{font-size:.8rem;font-weight:400;color:rgba(255,255,255,.4);line-height:1.65;}

/* ── FOOTER ── */
.footer{background:#111113;}
.foot-inner{max-width:1360px;margin:0 auto;padding:clamp(40px,5vw,64px) clamp(20px,4vw,64px);display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;border-bottom:.5px solid rgba(255,255,255,.07);}
.mast-logo-link{display:block;}
.foot-logo{font-family:var(--serif);font-size:1.15rem;font-weight:700;color:white;margin-bottom:10px;display:block;letter-spacing:-.02em;}
.foot-logo span{color:var(--red3);}
.foot-desc{font-size:.8rem;font-weight:400;color:rgba(255,255,255,.38);line-height:1.75;max-width:240px;}
.foot-col h4{font-size:.62rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.25);margin-bottom:16px;}
.foot-col ul{list-style:none;display:flex;flex-direction:column;gap:9px;}
.foot-col a{font-size:.82rem;font-weight:400;color:rgba(255,255,255,.45);transition:color .2s;}
.foot-col a:hover{color:white;}
.foot-copy{max-width:1360px;margin:0 auto;padding:16px clamp(20px,4vw,64px);font-size:.66rem;color:rgba(255,255,255,.18);}

/* ── CALC WIDGET ── */
.cw-sticky{position:sticky;top:72px;}
.cw{background:white;border-radius:var(--r-lg);box-shadow:var(--shadow-lg);padding:24px;border:.5px solid var(--rule);}
.cw-badge{font-size:.6rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--red);margin-bottom:10px;display:flex;align-items:center;gap:7px;}
.cw-badge::before{content:'';width:14px;height:1.5px;background:var(--red);}
.cw-title{font-family:var(--serif);font-size:1.2rem;font-weight:700;color:var(--ink);letter-spacing:-.02em;line-height:1.2;margin-bottom:20px;padding-bottom:16px;border-bottom:.5px solid var(--rule);}

/* ── FORM FIELDS ── */
.f{margin-bottom:16px;}
.f label{display:block;font-size:.65rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--ink3);margin-bottom:6px;transition:color .2s;}
.f:focus-within label{color:var(--red);}
.f input,.f select,.f input[type=date],.f input[type=text]{width:100%;background:var(--bg2);border:1.5px solid transparent;border-radius:var(--r-sm);padding:10px 13px;font-family:var(--mono);font-size:.88rem;color:var(--ink);outline:none;-webkit-appearance:none;transition:all .2s var(--ease);}
.f input:focus,.f select:focus{border-color:var(--red);background:white;box-shadow:0 0 0 3px var(--red-dim);}
.f input::placeholder{color:var(--ink5);}
.f select option{background:white;}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.fsel{position:relative;}
.fsel::after{content:'↓';position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--ink4);font-size:.7rem;pointer-events:none;}
.fsel select{padding-right:28px;cursor:pointer;}

/* ── SWITCHER ── */
.sw{display:flex;gap:3px;margin-bottom:18px;background:var(--bg2);padding:3px;border-radius:var(--r-sm);}
.swb{flex:1;font-family:var(--sans);font-size:.68rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--ink3);background:transparent;border:none;border-radius:5px;padding:7px 8px;cursor:pointer;transition:all .2s var(--ease);}
.swb.on{background:white;color:var(--ink);box-shadow:var(--shadow-sm);}

/* ── RANGE SLIDER ── */
.rtop{display:flex;justify-content:space-between;margin-bottom:4px;}
.rtop label{margin-bottom:0;}
.rval{font-family:var(--mono);font-size:.82rem;color:var(--red);font-weight:500;}
input[type=range]{-webkit-appearance:none;width:100%;height:3px;background:var(--bg3);border:none;padding:0;cursor:pointer;border-radius:100px;margin:4px 0;}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;background:white;border-radius:50%;border:2px solid var(--red);box-shadow:0 1px 6px rgba(215,0,21,0.2);}
.rmarks{display:flex;justify-content:space-between;margin-top:4px;font-size:.58rem;color:var(--ink5);}

/* ── GO BUTTON ── */
.go{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;padding:13px 20px;background:var(--ink);color:white;font-family:var(--sans);font-size:.84rem;font-weight:600;letter-spacing:.01em;border:none;border-radius:var(--r-pill);cursor:pointer;margin-top:8px;transition:all .3s var(--ease);}
.go:hover{background:var(--red);transform:translateY(-1px);box-shadow:0 4px 20px var(--red-glow);}
.go:active{transform:translateY(0);box-shadow:none;}
.go-arr{transition:transform .25s var(--ease);}
.go:hover .go-arr{transform:translateX(4px);}

/* ── RESULT CARD ── */
.res{display:none;margin-top:16px;border-radius:var(--r);overflow:hidden;animation:rin .3s var(--ease);border:.5px solid var(--rule);}
.res.show{display:block;}
@keyframes rin{from{opacity:0;transform:translateY(8px) scale(.98);}to{opacity:1;transform:translateY(0) scale(1);}}
.res-top{padding:22px 22px 16px;background:var(--ink);}
.res-lbl{font-size:.58rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:rgba(255,255,255,.35);margin-bottom:5px;}
.res-val{font-family:var(--mono);font-size:2.6rem;font-weight:700;letter-spacing:-.04em;color:white;line-height:1;margin-bottom:0;}
.res-val small{font-size:1rem;color:var(--red3);font-weight:500;}
.res-body{padding:0 0 0;background:white;}
.res-hr{height:.5px;background:var(--rule2);}
.res-row{display:flex;justify-content:space-between;align-items:center;padding:10px 20px;border-bottom:.5px solid var(--rule2);gap:8px;}
.res-row:last-child{border-bottom:none;}
.res-k{font-size:.75rem;color:var(--ink3);}
.res-v{font-family:var(--mono);font-size:.85rem;color:var(--ink);font-weight:500;text-align:right;}

/* ── BMI BAR ── */
.bmiw{margin:14px 0 4px;position:relative;}
.bmitrack{height:4px;border-radius:100px;background:linear-gradient(90deg,#5BA4C8 0 24%,#52A868 24% 50%,#C8B040 50% 70%,#C87040 70% 84%,#C04040 84% 100%);}
.bmipin{position:absolute;top:-7px;width:18px;height:18px;background:white;border-radius:50%;border:2.5px solid var(--ink);transform:translateX(-50%);box-shadow:var(--shadow-sm);transition:left .5s cubic-bezier(.4,0,.2,1);}
.bmiscale{display:flex;justify-content:space-between;margin-top:6px;font-size:.56rem;color:rgba(255,255,255,.35);letter-spacing:.03em;}

/* ── ARTICLE LAYOUT ── */
.art-crumb{padding:14px 0;font-size:.72rem;color:var(--ink4);display:flex;gap:8px;align-items:center;border-bottom:.5px solid var(--rule);}
.art-crumb a{color:var(--red);transition:opacity .2s;}
.art-crumb a:hover{opacity:.7;}
.art-crumb-sep{color:var(--ink5);}
.art-header{padding:clamp(28px,4vw,56px) 0 32px;border-bottom:.5px solid var(--rule);}
.art-cat{font-size:.62rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--red);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.art-cat::before{content:'';width:16px;height:1.5px;background:var(--red);}
.art-h1{font-family:var(--serif);font-size:clamp(1.9rem,4.5vw,3.4rem);font-weight:800;letter-spacing:-.04em;line-height:.96;color:var(--ink);margin-bottom:18px;}
.art-h1 em{font-style:italic;color:var(--red);}
.art-standfirst{font-size:.97rem;font-weight:400;color:var(--ink3);line-height:1.7;max-width:600px;border-left:2px solid var(--red3);padding-left:16px;}
.art-body-wrap{display:grid;grid-template-columns:1fr 420px;gap:0;padding-bottom:clamp(40px,5vw,72px);}
.art-col{padding:clamp(28px,4vw,48px) clamp(24px,3vw,44px) 0 0;}
.art-calc-col{padding:clamp(28px,4vw,48px) 0 0 clamp(24px,3vw,44px);border-left:.5px solid var(--rule);}
.art-body p{font-size:.9rem;font-weight:400;color:var(--ink2);line-height:1.85;margin-bottom:18px;max-width:58ch;}
.art-body h3{font-family:var(--serif);font-size:1.0rem;font-weight:700;color:var(--ink);margin:28px 0 10px;letter-spacing:-.015em;}
.art-body ul{list-style:none;margin:0 0 18px;}
.art-body ul li{font-size:.88rem;color:var(--ink2);padding:7px 0;border-bottom:.5px solid var(--rule2);display:flex;gap:10px;line-height:1.6;}
.art-body ul li::before{content:'—';color:var(--red);flex-shrink:0;font-size:.78rem;}
.art-pq{margin:28px 0;padding:18px 20px;background:var(--bg2);border-left:2px solid var(--red);border-radius:0 var(--r-sm) var(--r-sm) 0;font-size:.93rem;font-weight:400;font-style:italic;color:var(--ink2);line-height:1.7;}
.art-related{border-top:.5px solid var(--rule);padding:clamp(28px,4vw,48px) 0;}
.art-related-title{font-family:var(--serif);font-size:.95rem;font-weight:700;color:var(--ink);margin-bottom:20px;display:flex;align-items:center;gap:10px;letter-spacing:-.01em;}
.art-related-title::after{content:'';flex:1;height:.5px;background:var(--rule);}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.related-card{background:var(--bg2);border-radius:var(--r);padding:18px;transition:all .25s var(--ease);border:.5px solid transparent;}
.related-card:hover{background:white;border-color:var(--rule);box-shadow:var(--shadow);transform:translateY(-2px);}
.related-card-cat{font-size:.6rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--red);margin-bottom:6px;}
.related-card-title{font-family:var(--serif);font-size:.9rem;font-weight:700;color:var(--ink);line-height:1.3;margin-bottom:6px;letter-spacing:-.01em;}
.related-card-desc{font-size:.76rem;color:var(--ink4);line-height:1.6;}

/* ── PAGE SECTIONS ── */
.ps{max-width:720px;padding:clamp(40px,5vw,80px) 0;}
.ps-label{font-size:.62rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--red);margin-bottom:12px;display:flex;align-items:center;gap:8px;}
.ps-label::before{content:'';width:16px;height:1.5px;background:var(--red);}
.ps-h1{font-family:var(--serif);font-size:clamp(2rem,4vw,3rem);font-weight:800;letter-spacing:-.04em;color:var(--ink);margin-bottom:24px;line-height:1.0;}
.ps p{font-size:.9rem;color:var(--ink2);line-height:1.85;margin-bottom:16px;}
.ps h3{font-family:var(--serif);font-size:1.0rem;font-weight:700;color:var(--ink);margin:28px 0 10px;}
.ps ul{list-style:none;margin:0 0 18px;}
.ps ul li{font-size:.88rem;color:var(--ink2);padding:7px 0;border-bottom:.5px solid var(--rule2);display:flex;gap:10px;line-height:1.6;}
.ps ul li::before{content:'—';color:var(--red);flex-shrink:0;}
.ps a{color:var(--red);}
.cf-field{margin-bottom:20px;}
.cf-field label{display:block;font-size:.62rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--ink3);margin-bottom:7px;}
.cf-field input,.cf-field textarea,.cf-field select{width:100%;background:var(--bg2);border:1.5px solid transparent;border-radius:var(--r-sm);padding:11px 14px;font-family:var(--sans);font-size:.9rem;color:var(--ink);outline:none;transition:all .2s;}
.cf-field input:focus,.cf-field textarea:focus,.cf-field select:focus{border-color:var(--red);background:white;box-shadow:0 0 0 3px var(--red-dim);}
.cf-field textarea{min-height:130px;resize:vertical;}
.cf-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.cf-note{font-size:.74rem;color:var(--ink4);margin-top:10px;}

/* ── QA BLOCKS ── */
.qa-block{margin:24px 0;padding:20px 22px;background:var(--bg2);border-radius:var(--r);}
.qa-block h2{font-family:var(--serif);font-size:.97rem;font-weight:700;color:var(--ink);margin:0 0 9px;letter-spacing:-.015em;}
.qa-block p{font-size:.85rem;color:var(--ink3);line-height:1.85;margin:0;}

/* ── FAQ ACCORDION ── */
.faq-block{margin:32px 0 0;border-top:.5px solid var(--rule);}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:14px 0;cursor:pointer;font-family:var(--serif);font-size:.9rem;font-weight:700;color:var(--ink);letter-spacing:-.01em;border-bottom:.5px solid var(--rule);user-select:none;}
.faq-q:last-child{border-bottom:none;}
.faq-icon{font-size:.75rem;color:var(--ink4);transition:transform .25s var(--ease);}
.faq-a{display:none;font-size:.85rem;color:var(--ink3);line-height:1.8;padding:12px 0 16px;}
.faq-q.open .faq-icon{transform:rotate(45deg);color:var(--red);}
.faq-q.open + .faq-a{display:block;}

/* ── ALSO-USE CROSS-LINKS ── */
.also-use{border-top:.5px solid var(--rule);padding:28px 0;max-width:680px;}
.also-use-title{font-size:.62rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--ink4);margin-bottom:16px;}
.also-use-links{display:flex;flex-direction:column;}
.also-use-item{display:flex;align-items:baseline;gap:10px;padding:9px 0;border-bottom:.5px solid var(--rule2);}
.also-use-item a{font-family:var(--serif);font-size:.88rem;font-weight:700;color:var(--red);flex-shrink:0;}
.also-use-item span{font-size:.78rem;color:var(--ink4);}

/* ── SCROLL REVEAL ── */
.rv{opacity:0;transform:translateY(16px);transition:opacity .55s var(--ease),transform .55s var(--ease);}
.rv.in{opacity:1;transform:none;}

/* ── RESPONSIVE ── */
@media(max-width:1100px){
  .art-body-wrap{grid-template-columns:1fr;}
  .art-col{padding-right:0;border-bottom:.5px solid var(--rule);padding-bottom:32px;}
  .art-calc-col{padding-left:0;border-left:none;}
  .cw-sticky{position:static;}
  .foot-inner{grid-template-columns:1fr 1fr;}
  .related-grid{grid-template-columns:1fr 1fr;}
}
@media(max-width:768px){
  .mast-inner{height:50px;}
  .mast-nav{gap:0;}
  .mast-nav a{padding:5px 9px;font-size:.72rem;}
  .frow{grid-template-columns:1fr;}
  .fb-grid{grid-template-columns:1fr 1fr;}
  .related-grid{grid-template-columns:1fr;}
  .foot-inner{grid-template-columns:1fr 1fr;gap:28px;}
  .cf-row{grid-template-columns:1fr;}
}
@media(max-width:520px){
  .mast-nav{display:none;}
  .foot-inner{grid-template-columns:1fr;}
/* ── HAMBURGER ── */
.mast-hamburger{display:none;flex-direction:column;gap:4px;cursor:pointer;padding:8px;border:none;background:transparent;border-radius:var(--r-sm);}
.mast-hamburger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:all .25s var(--ease);}
.mast-hamburger.open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.mast-hamburger.open span:nth-child(2){opacity:0;}
.mast-hamburger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.mast-mobile-nav{display:none;position:fixed;top:56px;left:0;right:0;background:var(--glass);backdrop-filter:saturate(200%) blur(24px);-webkit-backdrop-filter:saturate(200%) blur(24px);border-bottom:.5px solid rgba(0,0,0,0.09);z-index:199;padding:12px 20px 16px;}
.mast-mobile-nav.open{display:block;}
.mast-mobile-nav a{display:block;font-size:.88rem;font-weight:500;color:var(--ink2);padding:10px 12px;border-radius:var(--r-sm);transition:all .2s;}
.mast-mobile-nav a:hover,.mast-mobile-nav a.active{color:var(--red);background:var(--red-dim);}
@media(max-width:520px){
  .mast-nav{display:none;}
  .mast-hamburger{display:flex;}
}
}
.art-figure{margin:24px 0 32px;}.art-figcaption{font-size:12px;color:var(--ink3,#6E6E73);margin-top:8px;text-align:center;}

.cookie-banner{position:fixed;bottom:0;left:0;right:0;z-index:9999;background:var(--ink,#1D1D1F);color:white;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;line-height:1.5;}
.cookie-banner a{color:#FF3347;text-decoration:underline;}
.cookie-banner button{background:#D70015;color:white;border:none;border-radius:20px;padding:7px 20px;font-size:13px;font-weight:600;cursor:pointer;white-space:nowrap;flex-shrink:0;}
.cookie-banner button:hover{background:#FF3347;}
@media(max-width:520px){.cookie-banner{flex-direction:column;align-items:flex-start;gap:10px;}}
.rgn-wrap{position:relative;display:flex;align-items:center;margin-left:10px;flex-shrink:0;}
.rgn-btn{display:flex;align-items:center;gap:5px;padding:5px 10px 5px 8px;border-radius:20px;border:.5px solid var(--rule,#E8E8ED);background:var(--bg2,#F5F5F7);cursor:pointer;font-family:var(--sans);font-size:0.78rem;font-weight:600;color:var(--ink2,#3A3A3C);line-height:1;white-space:nowrap;transition:background .15s,border-color .15s;}
.rgn-btn:hover{background:var(--bg3,#E8E8ED);border-color:var(--ink5,#D1D1D6);}
.rgn-flag{font-size:14px;line-height:1;}
.rgn-caret{font-size:9px;color:var(--ink4,#AEAEB2);margin-left:2px;}
.rgn-drop{display:none;position:absolute;top:calc(100% + 8px);right:0;background:white;border:.5px solid var(--rule,#E8E8ED);border-radius:12px;padding:6px;box-shadow:0 8px 32px rgba(0,0,0,0.12);z-index:1000;min-width:164px;}
.rgn-drop.open{display:block;}
.rgn-item{display:flex;align-items:center;gap:9px;padding:8px 12px;border-radius:8px;cursor:pointer;font-size:0.85rem;font-weight:500;color:var(--ink2,#3A3A3C);white-space:nowrap;transition:background .12s;}
.rgn-item:hover{background:var(--bg2,#F5F5F7);}
.rgn-item.active{color:var(--red,#D70015);font-weight:700;}
.rgn-item-flag{font-size:15px;line-height:1;}
.rgn-item-cur{font-size:11px;color:var(--ink4,#AEAEB2);margin-left:auto;padding-left:8px;}
@media(max-width:768px){.rgn-label{display:none;}}
@media(max-width:520px){.rgn-wrap{margin-left:4px;}}

/* ── Focus accessibility ── */
:focus-visible{outline:2px solid var(--red,#D70015);outline-offset:2px;border-radius:3px;}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--red,#D70015);outline-offset:2px;}


/* ── Dark / Light mode ──────────────────────────────────────────── */
:root{
  --bg:#FFFFFF;
  --bg2:#F5F5F7;
  --bg3:#E8E8ED;
  --ink:#1D1D1F;
  --ink2:#3A3A3C;
  --ink3:#6E6E73;
  --ink4:#AEAEB2;
  --rule:#E8E8ED;
  --shadow:rgba(0,0,0,.06);
  --card-bg:#FFFFFF;
  --callout-bg:rgba(215,0,21,.07);
}
[data-theme="dark"]{
  --bg:#000000;
  --bg2:#1C1C1E;
  --bg3:#2C2C2E;
  --ink:#F5F5F7;
  --ink2:#EBEBF0;
  --ink3:#98989D;
  --ink4:#636366;
  --rule:#38383A;
  --shadow:rgba(0,0,0,.4);
  --card-bg:#1C1C1E;
  --callout-bg:rgba(215,0,21,.15);
}
body{background:var(--bg);color:var(--ink);transition:background .2s,color .2s;}

/* ── Theme toggle button ─────────────────────────────────────────── */
.theme-toggle{
  display:flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:50%;
  background:var(--bg2);border:.5px solid var(--rule);
  cursor:pointer;font-size:16px;transition:background .2s;
  flex-shrink:0;line-height:1;
}
.theme-toggle:hover{background:var(--bg3);}
.theme-toggle .icon-dark{display:block;}
.theme-toggle .icon-light{display:none;}
[data-theme="dark"] .theme-toggle .icon-dark{display:none;}
[data-theme="dark"] .theme-toggle .icon-light{display:block;}

/* Dark mode specific overrides */
[data-theme="dark"] .mast{background:rgba(0,0,0,.85);border-bottom:.5px solid var(--rule);}
[data-theme="dark"] .calc-widget{background:var(--bg2);border-color:var(--rule);}
[data-theme="dark"] input,[data-theme="dark"] select{
  background:var(--bg3);color:var(--ink);border-color:var(--rule);
}
[data-theme="dark"] .res{background:var(--bg2);border-color:var(--rule);}
[data-theme="dark"] .related-card{background:var(--bg2);border-color:var(--rule);}
[data-theme="dark"] .related-card:hover{background:var(--bg3);}
[data-theme="dark"] footer{background:var(--bg2);}
[data-theme="dark"] .art-author{background:var(--bg2);}
[data-theme="dark"] .cookie-banner{background:var(--ink);}
[data-theme="dark"] .callout-example{background:rgba(215,0,21,.12);}
[data-theme="dark"] table td,[data-theme="dark"] table th{border-color:var(--rule);}
[data-theme="dark"] .sal-hero{background:var(--bg2);}
[data-theme="dark"] .cmp-table-wrap table thead tr{background:var(--bg3);}

/* ── Print stylesheet ──────────────────────────────────────────── */
@media print {
  .mast,.cookie-banner,.ad,footer,.theme-toggle,.art-calc-col .go,
  #sc-share-btn,.rgn-wrap,.fb,.art-related,.qa-block,.toc,
  .art-crumb,.art-author { display:none !important; }
  
  body { background:#fff !important; color:#000 !important; font-size:11pt; }
  
  .pw { max-width:100% !important; padding:0 !important; margin:0 !important; }
  .art-body-wrap { display:block !important; }
  .art-calc-col { border:none !important; padding:0 !important; }
  
  .res { border:1pt solid #ccc !important; background:#fff !important;
         break-inside:avoid; margin-bottom:12pt; }
  .res-top { padding:12pt !important; }
  .res-val { font-size:24pt !important; }
  
  /* Amortisation table */
  #m-amort { display:block !important; }
  #m-amort table { border-collapse:collapse; width:100%; font-size:9pt; }
  #m-amort td, #m-amort th { border:0.5pt solid #ccc; padding:4pt 6pt; }
  
  /* Show all rows when printing */
  #m-amort-btn { display:none !important; }
  
  h1.art-h1 { font-size:18pt; margin-bottom:6pt; }
  p.art-standfirst { font-size:12pt; color:#333; }
  
  @page { margin:2cm; }
  
  a[href]:after { content:" (" attr(href) ")"; font-size:8pt; color:#666; }
  a[href^="#"]:after, a[href^="/"]:after { content:""; }
}
/* ── Result count-up animation ─────────────────────────────────────── */
.res-val { transition: opacity .15s; }
.res-val.counting { opacity: .6; }

/* ── Additional dark mode overrides ────────────────────────────────── */
[data-theme="dark"] .faq-q{color:var(--ink);background:transparent;}
[data-theme="dark"] .faq-a{background:var(--bg2);}
[data-theme="dark"] .swb{background:var(--bg2);border-color:var(--rule);color:var(--ink3);}
[data-theme="dark"] .swb.active{background:var(--ink);color:white;}
[data-theme="dark"] .toc{background:var(--bg2);border-color:var(--rule);}
[data-theme="dark"] .blog-card{background:var(--bg2);border-color:var(--rule);}
[data-theme="dark"] .blog-card:hover{background:var(--bg3);}
[data-theme="dark"] .art-crumb a{color:var(--ink3);}
[data-theme="dark"] .fb{background:var(--bg2);}
[data-theme="dark"] .calc-grid-card{background:var(--bg2);border-color:var(--rule);}
[data-theme="dark"] .calc-grid-card:hover{background:var(--bg3);}
[data-theme="dark"] .art-reviewed{color:var(--ink4);}
[data-theme="dark"] .res-hr{background:rgba(255,255,255,.1);}
[data-theme="dark"] .res-k{color:var(--ink3);}
[data-theme="dark"] .res-v{color:var(--ink);}
[data-theme="dark"] .f-pre{background:var(--bg3);border-color:var(--rule);color:var(--ink3);}
[data-theme="dark"] .fb-num{color:white;}
[data-theme="dark"] .fb-lbl{color:var(--ink3);}
[data-theme="dark"] .art-sources{border-color:var(--rule);}
[data-theme="dark"] .art-sources a{color:var(--ink3);}
[data-theme="dark"] .inv-chart-bar-bg{background:var(--bg3);}
[data-theme="dark"] .sal-compare-card{background:var(--bg2);border-color:var(--rule);}
[data-theme="dark"] .sal-breakdown table tr.total td{background:var(--bg3);}
[data-theme="dark"] .cmp-table-wrap table tbody tr:nth-child(odd){background:var(--bg2);}
[data-theme="dark"] .cmp-table-wrap table tbody tr:nth-child(even){background:var(--bg);}
[data-theme="dark"] #m-amort{border-color:var(--rule);}
[data-theme="dark"] #m-amort table th{background:var(--bg3);}
[data-theme="dark"] .inv-mode-btn{background:var(--bg3);}
[data-theme="dark"] .inv-mode-btn button{color:var(--ink3);}
[data-theme="dark"] .salary-hub a{background:var(--bg2);border-color:var(--rule);color:var(--ink2);}

/* ── Calculation history ─────────────────────────────── */
.hist-panel{margin-top:16px;border-top:.5px solid var(--rule);padding-top:14px;}
.hist-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;}
.hist-title{font-size:.68rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--ink4);}
.hist-clear{font-size:.68rem;color:var(--ink4);background:none;border:none;cursor:pointer;font-family:inherit;padding:0;}
.hist-clear:hover{color:var(--red);}
.hist-item{display:flex;align-items:center;justify-content:space-between;padding:9px 12px;background:var(--bg2);border-radius:8px;margin-bottom:5px;cursor:pointer;border:.5px solid transparent;transition:all .15s;}
.hist-item:hover{border-color:var(--red);background:var(--bg);}
.hist-item-left{display:flex;flex-direction:column;gap:2px;}
.hist-item-summary{font-size:.78rem;font-weight:600;color:var(--ink2);}
.hist-item-time{font-size:.66rem;color:var(--ink4);}
.hist-item-result{font-size:.85rem;font-weight:700;font-family:var(--mono);color:var(--red);}
[data-theme="dark"] .hist-item{background:var(--bg3);}
[data-theme="dark"] .hist-item:hover{background:var(--bg2);}

/* ── Blog styles ── */

/* BLOG INDEX */
.blog-hero{padding:clamp(32px,5vw,64px) 0 0;border-bottom:3px solid var(--ink);}
.blog-hero-label{font-size:.6rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--red);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.blog-hero-label::before{content:'';width:18px;height:1px;background:var(--red);}
.blog-hero-title{font-family:var(--serif);font-size:clamp(2rem,5vw,4rem);font-weight:700;letter-spacing:-.04em;line-height:.97;color:var(--ink);margin-bottom:16px;}
.blog-hero-title em{font-style:italic;color:var(--red);}
.blog-hero-standfirst{font-size:.95rem;font-weight:300;color:var(--ink2);line-height:1.75;max-width:520px;margin-bottom:32px;}
.blog-meta-bar{display:flex;align-items:center;justify-content:space-between;padding:14px 0;border-top:.5px solid var(--rule);border-bottom:.5px solid var(--rule);margin-bottom:32px;flex-wrap:wrap;gap:10px;}
.blog-meta-count{font-size:.65rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--ink4);}
.blog-cat-filters{display:flex;gap:6px;flex-wrap:wrap;}
.blog-cat-btn{font-size:.62rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;padding:5px 12px;border:.5px solid var(--rule);border-radius:100px;background:transparent;color:var(--ink3);cursor:pointer;transition:all .2s;}
.blog-cat-btn.active,.blog-cat-btn:hover{background:var(--red);color:white;border-color:var(--red);}

/* FEATURED ARTICLE (first article, big) */
.blog-featured{display:grid;grid-template-columns:1fr 380px;gap:48px;padding-bottom:40px;border-bottom:.5px solid var(--rule);margin-bottom:40px;align-items:start;}
.blog-feat-cat{font-size:.6rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--red);margin-bottom:10px;display:flex;align-items:center;gap:8px;}
.blog-feat-cat::before{content:'';width:16px;height:1px;background:var(--red);}
.blog-feat-title{font-family:var(--serif);font-size:clamp(1.4rem,3vw,2.4rem);font-weight:700;letter-spacing:-.03em;color:var(--ink);line-height:1.08;margin-bottom:14px;}
.blog-feat-title:hover{color:var(--red);}
.blog-feat-desc{font-size:.88rem;font-weight:300;color:var(--ink2);line-height:1.75;margin-bottom:16px;max-width:50ch;}
.blog-feat-meta{font-size:.65rem;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--ink4);}
.blog-feat-read{display:inline-flex;align-items:center;gap:6px;font-size:.7rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--red);border-bottom:1px solid var(--red);padding-bottom:2px;}
.blog-feat-right{border-left:.5px solid var(--rule);padding-left:48px;}
.blog-feat-aside-title{font-size:.62rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--ink4);margin-bottom:16px;}

/* ARTICLE GRID */
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);}
.blog-card{background:var(--bg);padding:24px;display:flex;flex-direction:column;gap:8px;transition:background .2s;text-decoration:none;}
.blog-card:hover{background:var(--bg2);}
.blog-card-cat{font-size:.58rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--red);}
.blog-card-title{font-family:var(--serif);font-size:1rem;font-weight:700;color:var(--ink);line-height:1.25;letter-spacing:-.01em;}
.blog-card-desc{font-size:.78rem;font-weight:300;color:var(--ink3);line-height:1.65;flex:1;}
.blog-card-meta{font-size:.62rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--ink4);margin-top:6px;}
.blog-aside-list{list-style:none;}
.blog-aside-list li{border-bottom:.5px solid var(--rule2);padding:10px 0;}
.blog-aside-list a{font-family:var(--serif);font-size:.88rem;font-weight:400;color:var(--ink2);display:block;line-height:1.3;transition:color .2s;}
.blog-aside-list a:hover{color:var(--red);}
.blog-aside-list .aside-cat{font-size:.58rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--red);margin-bottom:3px;}

/* ARTICLE PAGE */
.art-pg-wrap{display:block;padding:clamp(28px,4vw,56px) 0 clamp(40px,5vw,80px);max-width:780px;}
.art-pg-body h2{font-family:var(--serif);font-size:1.5rem;font-weight:700;color:var(--ink);letter-spacing:-.02em;margin:36px 0 14px;line-height:1.15;}
.art-pg-body h3{font-family:var(--serif);font-size:1.1rem;font-weight:700;color:var(--ink);margin:28px 0 10px;}
.art-pg-body p{font-size:.92rem;font-weight:300;color:var(--ink2);line-height:1.9;margin-bottom:18px;max-width:62ch;}
.art-pg-body ul,.art-pg-body ol{margin:0 0 20px 0;padding-left:0;list-style:none;}
.art-pg-body ul li,.art-pg-body ol li{font-size:.9rem;font-weight:300;color:var(--ink2);padding:7px 0;border-bottom:.5px solid var(--rule2);display:flex;gap:10px;line-height:1.65;}
.art-pg-body ul li::before{content:'—';color:var(--red);flex-shrink:0;}
.art-pg-body ol{counter-reset:ol;}
.art-pg-body ol li::before{content:counter(ol);counter-increment:ol;font-family:var(--mono);font-size:.75rem;font-weight:700;color:var(--red);flex-shrink:0;min-width:1.4em;}
.art-pg-body blockquote{margin:28px 0;padding:16px 20px;background:var(--bg2);border-left:2px solid var(--red);font-family:var(--serif);font-style:italic;font-size:1.05rem;color:var(--ink2);line-height:1.65;}
.art-pg-body strong{font-weight:600;color:var(--ink);}
.art-pg-body a{color:var(--red);border-bottom:1px solid rgba(139,26,46,0.3);}
.art-date{font-size:.65rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--ink4);margin-bottom:24px;display:flex;align-items:center;gap:14px;}
.art-date::after{content:'';flex:1;height:1px;background:var(--rule);}

/* SIDEBAR */
.art-sidebar{}
.sidebar-widget{margin-bottom:32px;padding-bottom:32px;border-bottom:.5px solid var(--rule);}
.sidebar-widget:last-child{border-bottom:none;}
.sidebar-widget-title{font-size:.6rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--ink4);margin-bottom:14px;}
.sidebar-cta{background:var(--red);padding:20px;border-radius:var(--r-sm);text-decoration:none;display:block;transition:background .2s;}
.sidebar-cta:hover{background:var(--red2);}
.sidebar-cta-label{font-size:.58rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.65);margin-bottom:6px;}
.sidebar-cta-title{font-family:var(--serif);font-size:1rem;font-weight:700;color:white;line-height:1.2;margin-bottom:8px;}
.sidebar-cta-sub{font-size:.75rem;font-weight:300;color:rgba(255,255,255,.65);}
.sidebar-links{list-style:none;}
.sidebar-links li{border-bottom:.5px solid var(--rule2);padding:8px 0;}
.sidebar-links a{font-size:.82rem;font-weight:300;color:var(--ink2);display:flex;align-items:center;justify-content:space-between;transition:color .2s;}
.sidebar-links a:hover{color:var(--red);}
.sidebar-links a::after{content:'→';color:var(--ink4);font-size:.72rem;}

@media(max-width:1024px){
  .blog-featured{grid-template-columns:1fr;}
  .blog-feat-right{border-left:none;padding-left:0;border-top:.5px solid var(--rule);padding-top:28px;}
  .art-pg-wrap{grid-template-columns:1fr;}
  .art-sidebar{display:none;}
}
@media(max-width:768px){
  .blog-grid{grid-template-columns:1fr 1fr;}
}
@media(max-width:480px){
  .blog-grid{grid-template-columns:1fr;}
}