/*
Theme Name: Isomer | ایزومر
Theme URI: https://isomer.ir
Author: Isomer
Description: قالب وبلاگ شیمی؛ راست‌چین، فونت وزیرمتن، حالت روشن/تاریک، انتخاب رنگ شعله، مولکول سه‌بعدی، جدول تناوبی کامل و ابزارهای نگارش فرمول.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
License: GPL-2.0-or-later
Text Domain: isomer
*/

/* ───────── توکن‌ها ───────── */
:root,html[data-theme=light]{
  --bg:#e8eff1;--bg2:#dbe6e9;--surface:#f7fafa;--surface2:#eef4f5;
  --ink:#0d1a20;--mute:#4f636b;--line:rgba(13,26,32,.13);--line2:rgba(13,26,32,.26);
  --shadow:0 18px 40px -22px rgba(13,26,32,.38);
  --acc-t:color-mix(in oklab,var(--acc) 55%,var(--ink));
}
html[data-theme=dark]{
  --bg:#071218;--bg2:#0b1b23;--surface:#0e1e27;--surface2:#122630;
  --ink:#e6f1f4;--mute:#8aa4ad;--line:rgba(230,241,244,.12);--line2:rgba(230,241,244,.26);
  --shadow:0 24px 44px -24px rgba(0,0,0,.85);
  --acc-t:color-mix(in oklab,var(--acc) 82%,#fff);
}
:root{
  --font:'Vazirmatn','VazirLocal','Vazir',system-ui,-apple-system,'Segoe UI',Tahoma,sans-serif;
  --acc:#ff9f1c;--on-acc:#2a1600;
  --hdr:68px;--fs:1;--ease:cubic-bezier(.2,.8,.2,1);
  color-scheme:light dark;
}
html[data-accent=sodium]{--acc:#ff9f1c;--on-acc:#2a1600}
html[data-accent=copper]{--acc:#2bd68f;--on-acc:#03231a}
html[data-accent=strontium]{--acc:#ff4d5e;--on-acc:#2b0308}
html[data-accent=cobalt]{--acc:#3d8bff;--on-acc:#001633}
html[data-accent=barium]{--acc:#b5e61d;--on-acc:#1a2400}
@font-face{font-family:'VazirLocal';src:url('assets/fonts/Vazirmatn[wght].woff2') format('woff2');font-weight:100 900;font-display:swap}

/* ───────── پایه ───────── */
*,*::before,*::after{box-sizing:border-box}
html{font-size:calc(100% * var(--fs));-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--hdr) + 16px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.85;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body.has-overlay{overflow:hidden}
img,svg,canvas{max-width:100%;display:block}
img{height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0;padding:0}
h1,h2,h3,h4{line-height:1.4;margin:0}
p{margin:0}
::selection{background:var(--acc);color:var(--on-acc)}
:focus-visible{outline:2px solid var(--acc);outline-offset:3px;border-radius:6px}
.skip{position:absolute;inset-inline-start:16px;top:-60px;background:var(--acc);color:var(--on-acc);padding:8px 16px;border-radius:8px;z-index:200}
.skip:focus{top:12px}
.screen-reader-text{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.wrap{width:min(1240px,100%);margin-inline:auto;padding-inline:clamp(16px,4vw,40px)}
.ic{width:22px;height:22px;flex:none}
main{min-height:60vh}

/* الگوی لانه‌زنبوری (حلقهٔ بنزنی) */
:root{--hex:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='49' viewBox='0 0 28 49'%3E%3Cpath d='M13.99 9.25l13 7.5v15l-13 7.5L1 31.75v-15l12.99-7.5zM3 17.9v12.7l10.99 6.34 11-6.35V17.9l-11-6.34L3 17.9zM0 15l12.98-7.5V0h-2v6.35L0 12.69v2.3zm0 18.5L12.98 41v8h-2v-6.85L0 35.81v-2.3zM15 0v7.5L27.99 15H28v-2.31h-.01L17 6.35V0h-2zm0 49v-8l12.99-7.5H28v2.31h-.01L17 42.15V49h-2z' fill-rule='evenodd'/%3E%3C/svg%3E")}
.bg-lattice{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(55% 45% at 88% -8%,color-mix(in oklab,var(--acc) 20%,transparent),transparent 70%),radial-gradient(40% 40% at 0% 42%,color-mix(in oklab,var(--acc) 8%,transparent),transparent 70%)}
.bg-lattice::before{content:"";position:absolute;inset:0;background:var(--line2);opacity:.5;-webkit-mask:var(--hex) 0 0/56px 98px;mask:var(--hex) 0 0/56px 98px}

/* نوار پیشرفت */
.topbar{position:fixed;top:0;inset-inline:0;height:3px;z-index:120;pointer-events:none}
.topbar i{display:block;height:100%;width:calc(var(--p,0) * 100%);background:var(--acc)}

/* ───────── هدر ───────── */
.site-header{position:sticky;top:0;z-index:60;background:color-mix(in oklab,var(--bg) 80%,transparent);-webkit-backdrop-filter:blur(14px) saturate(1.4);backdrop-filter:blur(14px) saturate(1.4);border-bottom:1px solid transparent;transition:border-color .3s}
.is-scrolled .site-header{border-color:var(--line)}
.hdr{display:flex;align-items:center;gap:20px;height:var(--hdr)}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand svg{width:40px;height:40px;color:var(--acc)}
.brand b{display:block;font-size:1.3rem;font-weight:900;line-height:1.1}
.brand small{display:block;font-size:.7rem;color:var(--mute);letter-spacing:.2em;line-height:1.2}
.brand .custom-logo{max-height:44px;width:auto}
.nav-main{flex:1;display:flex;justify-content:center}
.nav{display:flex;gap:2px;list-style:none;margin:0;padding:0;align-items:center}
.nav li{position:relative}
.nav a{display:flex;align-items:center;gap:6px;padding:8px 14px;border-radius:999px;font-weight:600;font-size:.95rem;transition:background .2s,color .2s}
.nav a:hover{background:var(--surface)}
.nav .current-menu-item>a,.nav .current-cat>a,.nav .current_page_item>a{background:var(--acc);color:var(--on-acc)}
.nav .menu-item-has-children>a::after{content:"";width:6px;height:6px;border:solid currentColor;border-width:0 2px 2px 0;transform:rotate(45deg) translateY(-2px);opacity:.6}
.nav .sub-menu{position:absolute;top:100%;inset-inline-start:0;min-width:210px;list-style:none;margin:8px 0 0;padding:8px;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(6px);transition:.2s var(--ease)}
.nav li:hover>.sub-menu,.nav li:focus-within>.sub-menu{opacity:1;visibility:visible;transform:none}
.nav .sub-menu a{border-radius:10px}
.acts{display:flex;gap:8px;margin-inline-start:auto}
.nav-main+.acts{margin-inline-start:0}
.ibtn{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;border:1px solid var(--line2);background:var(--surface);transition:border-color .2s,background .2s}
.ibtn:hover{border-color:var(--acc)}
.ibtn .sun{display:none}
html[data-theme=dark] .ibtn .sun{display:block}
html[data-theme=dark] .ibtn .moon{display:none}

/* پنل ظاهر */
.pal{position:fixed;top:calc(var(--hdr) + 6px);inset-inline-end:clamp(16px,4vw,40px);width:300px;padding:18px;background:var(--surface);border:1px solid var(--line2);border-radius:20px;box-shadow:var(--shadow);z-index:80;opacity:0;visibility:hidden;transform:translateY(-8px);transition:.25s var(--ease)}
.pal.is-open{opacity:1;visibility:visible;transform:none}
.pal__t{font-size:.8rem;color:var(--mute);margin:14px 0 8px;font-weight:600}
.pal__t:first-child{margin-top:0}
.seg{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:4px;background:var(--bg2);border-radius:12px}
.seg button{padding:7px 4px;border-radius:9px;font-size:.85rem;font-weight:600;display:flex;align-items:center;justify-content:center;gap:5px}
.seg button .ic{width:16px;height:16px}
.seg button[aria-pressed=true]{background:var(--acc);color:var(--on-acc)}
.sw{display:flex;gap:10px;flex-wrap:wrap}
.sw__b{position:relative;width:34px;height:34px;border-radius:50%;background:var(--c);border:2px solid var(--surface);box-shadow:0 0 0 1px var(--line2);cursor:pointer;display:block}
.sw__b[aria-pressed=true]{box-shadow:0 0 0 2px var(--ink)}
.sw__custom{background:conic-gradient(#f33,#fc0,#3d3,#0cf,#36f,#f3c,#f33);overflow:hidden}
.sw__custom input{position:absolute;inset:0;opacity:0;width:100%;height:100%;cursor:pointer}
.fs{display:flex;align-items:center;justify-content:space-between;background:var(--bg2);border-radius:12px;padding:4px}
.fs button{width:44px;height:34px;border-radius:9px;font-weight:700}
.fs button:hover{background:var(--surface)}
.pal__reset{margin-top:14px;font-size:.82rem;color:var(--mute);text-decoration:underline;text-underline-offset:4px}

/* جستجوی تمام‌صفحه */
.search-o{position:fixed;inset:0;z-index:100;background:color-mix(in oklab,var(--bg) 92%,transparent);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);display:flex;flex-direction:column;align-items:center;padding:clamp(70px,14vh,150px) 20px 20px;opacity:0;visibility:hidden;transition:.3s}
.search-o.is-open{opacity:1;visibility:visible}
.search-o .searchform{width:min(760px,100%)}
.search-o .searchform input{font-size:clamp(1.3rem,4vw,2.2rem);padding:22px 26px;padding-inline-end:70px}
.search-o__close{position:absolute;top:18px;inset-inline-end:18px}
.search-o__hint{margin-top:18px;color:var(--mute);font-size:.9rem;text-align:center}
.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:20px}
.searchform{position:relative}
.searchform input{width:100%;padding:16px 22px;padding-inline-end:64px;border-radius:999px;border:1.5px solid var(--line2);background:var(--surface);outline:0;transition:border-color .2s}
.searchform input:focus{border-color:var(--acc)}
.searchform button{position:absolute;top:50%;inset-inline-end:8px;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;background:var(--acc);color:var(--on-acc);display:grid;place-items:center}

/* منوی موبایل (شیت) و دوک پایین */
.sheet{position:fixed;inset:0;z-index:90;background:var(--bg);display:flex;flex-direction:column;transform:translateY(100%);visibility:hidden;transition:transform .45s var(--ease),visibility .45s;padding-bottom:env(safe-area-inset-bottom)}
.sheet.is-open{transform:none;visibility:visible}
.sheet__h{display:flex;align-items:center;justify-content:space-between;padding:14px clamp(16px,4vw,40px);border-bottom:1px solid var(--line)}
.sheet__b{flex:1;overflow:auto;padding:8px clamp(16px,4vw,40px) 120px}
.sheet .nav{flex-direction:column;align-items:stretch;gap:0}
.sheet .nav>li>a{padding:16px 4px;border-radius:0;border-bottom:1px solid var(--line);font-size:1.35rem;font-weight:800;justify-content:space-between}
.sheet .nav>li>a:hover{background:none;color:var(--acc-t)}
.sheet .nav .current-menu-item>a{background:none;color:var(--acc-t)}
.sheet .nav .menu-item-has-children>a::after{transform:rotate(135deg)}
.sheet .nav .sub-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;background:none;margin:0;padding:0 0 8px;padding-inline-start:16px}
.sheet .nav .sub-menu a{font-size:1rem;padding:10px 4px;color:var(--mute)}
.sheet__t{font-size:.85rem;color:var(--mute);margin:26px 0 10px;font-weight:600}
.dock{display:none}
@media(max-width:899px){
  .nav-main{display:none}
  .acts .ibtn--desk{display:none}
  .hdr{justify-content:space-between}
  body{padding-bottom:calc(92px + env(safe-area-inset-bottom))}
  .dock{position:fixed;z-index:70;inset-inline:12px;bottom:calc(12px + env(safe-area-inset-bottom));height:66px;display:grid;grid-template-columns:repeat(5,1fr);align-items:center;background:color-mix(in oklab,var(--surface) 88%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--line2);border-radius:24px;box-shadow:var(--shadow)}
  .dock a,.dock button{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:.7rem;font-weight:600;color:var(--mute);height:100%;justify-content:center}
  .dock .is-cur{color:var(--acc-t)}
  .dock .dock__mid{color:var(--on-acc);height:auto}
  .dock .dock__mid span{display:grid;place-items:center;width:58px;height:58px;margin-top:-26px;border-radius:50%;background:var(--acc);box-shadow:0 10px 24px -8px var(--acc),0 0 0 6px var(--bg)}
  .dock .dock__mid small{color:var(--mute);font-size:.7rem;font-weight:600;margin-top:2px}
  .pal{top:auto;bottom:calc(92px + env(safe-area-inset-bottom));inset-inline:12px;width:auto}
}
@media(min-width:900px){.sheet{display:none}}

/* ───────── دکمه‌ها و اجزا ───────── */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:999px;background:var(--acc);color:var(--on-acc);font-weight:800;border:1.5px solid var(--acc);transition:transform .2s var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line2)}
.btn--ghost:hover{border-color:var(--acc)}
.chip,.tags a{display:inline-flex;align-items:center;gap:6px;padding:3px 12px;border-radius:999px;border:1px solid var(--line2);font-size:.8rem;font-weight:600;background:var(--surface);transition:border-color .2s}
.chip::before,.tags a::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--acc)}
.chip:hover,.tags a:hover{border-color:var(--acc)}
.tile{position:relative;display:grid;place-items:center;width:88px;aspect-ratio:1;border:2px solid var(--acc);border-radius:10px;background:color-mix(in oklab,var(--acc) 8%,var(--surface));font-family:ui-monospace,'SF Mono',Menlo,Consolas,monospace;line-height:1}
.tile i{position:absolute;top:7px;inset-inline-start:9px;font-style:normal;font-weight:600;font-size:.68rem;color:var(--mute)}
.tile b{font-size:2.3rem;font-weight:800;color:var(--ink)}
.tile em{position:absolute;bottom:6px;font-style:normal;font-family:var(--font);font-size:.62rem;color:var(--mute);max-width:90%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tile--lg{width:132px}.tile--lg b{font-size:3.6rem}.tile--lg i{font-size:.85rem}
.chem{direction:ltr;unicode-bidi:isolate;display:inline-block;white-space:nowrap;font-weight:600;font-family:var(--font)}
.chem sub,.chem sup{font-size:.68em;line-height:0}
.chem .st{font-size:.72em;color:var(--mute);margin-inline-start:.15em}
.chem--block{display:block;text-align:center;padding:1.1rem;border:1px dashed var(--line2);border-radius:14px;background:var(--surface);font-size:1.35rem;margin:1.6em 0;overflow-x:auto}

/* ───────── هیرو ───────── */
.hero{display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(20px,4vw,60px);align-items:center;padding:clamp(24px,5vw,64px) 0 clamp(20px,3vw,40px)}
.hero h1{font-size:clamp(2.5rem,6.4vw,5rem);font-weight:900;line-height:1.22;letter-spacing:-.02em;margin-bottom:.35em}
.hero h1 sub{font-size:.5em;color:var(--acc-t)}
.hero__lead{font-size:clamp(1rem,1.6vw,1.2rem);color:var(--mute);max-width:34em;margin-bottom:1.6em}
.hero .searchform{max-width:520px;margin-bottom:28px}
.stats{display:flex;gap:clamp(18px,3vw,40px);flex-wrap:wrap}
.stats div{padding-inline-end:clamp(18px,3vw,40px);border-inline-end:1px solid var(--line2)}
.stats div:last-child{border:0}
.stats b{display:block;font-size:2rem;font-weight:900;line-height:1.2}
.stats span{font-size:.85rem;color:var(--mute)}
.stage{position:relative;aspect-ratio:1/1;max-height:580px;width:100%;margin-inline:auto;border-radius:36px;border:1px solid var(--line2);overflow:hidden;background:
  radial-gradient(60% 60% at 50% 46%,color-mix(in oklab,var(--acc) 16%,transparent),transparent 72%),
  linear-gradient(var(--line) 1px,transparent 1px) 0 0/44px 44px,
  linear-gradient(90deg,var(--line) 1px,transparent 1px) 0 0/44px 44px,var(--surface);box-shadow:var(--shadow);animation:stage-in 1s var(--ease) both}
@keyframes stage-in{from{opacity:0;transform:scale(.94) rotate(-1.5deg)}}
.stage canvas{position:absolute;inset:0;width:100%;height:100%;touch-action:pan-y;cursor:grab}
.stage canvas:active{cursor:grabbing}
.orb{position:absolute;inset:14%;border:1px dashed var(--line2);border-radius:50%;pointer-events:none;animation:spin 40s linear infinite}
.orb--2{inset:22% 8%;transform:rotate(60deg);animation-duration:55s;animation-direction:reverse}
.orb--3{inset:8% 22%;transform:rotate(-60deg);animation-duration:70s}
@keyframes spin{to{rotate:360deg}}
.stage__top{position:absolute;top:18px;inset-inline:22px;display:flex;justify-content:space-between;font-size:.78rem;color:var(--mute);pointer-events:none}
.stage__info{position:absolute;inset-inline:20px;bottom:72px;pointer-events:none;display:flex;flex-direction:column;gap:2px}
.stage__info small{font-size:.85rem;color:var(--mute)}
.stage__info b{font-size:2rem;line-height:1.2}
.stage__info p{font-size:.85rem;color:var(--mute);max-width:26em}
.stage__tabs{position:absolute;bottom:16px;inset-inline:16px;display:flex;gap:6px;overflow-x:auto;scrollbar-width:none}
.stage__tabs button{flex:none;padding:6px 14px;border-radius:999px;border:1px solid var(--line2);background:var(--surface);font-size:.82rem;font-weight:700}
.stage__tabs button[aria-selected=true]{background:var(--acc);color:var(--on-acc);border-color:var(--acc)}
@media(max-width:899px){.hero{grid-template-columns:1fr}.stage{order:-1;max-height:none;border-radius:28px;aspect-ratio:1/.95}}
.ticker{overflow:hidden;border-block:1px solid var(--line2);padding:12px 0;direction:ltr;-webkit-mask:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.ticker__track{display:flex;gap:2.6rem;width:max-content;animation:mq 60s linear infinite;font-weight:700;color:var(--mute);white-space:nowrap}
.ticker__track span:nth-child(3n+1){color:var(--acc-t)}
@keyframes mq{to{transform:translateX(-50%)}}

/* ───────── بخش‌ها و کارت‌ها ───────── */
.sec{padding-top:clamp(40px,6vw,72px)}
.sec-h{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.sec-h h2{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:900}
.sec-h p{color:var(--mute);font-size:.95rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:20px}
.card{position:relative;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .25s,box-shadow .25s}
.card:hover{border-color:var(--acc);box-shadow:var(--shadow)}
.card__art{position:relative;display:grid;place-items:center;aspect-ratio:16/10;overflow:hidden;background:var(--bg2)}
.card__art::before{content:"";position:absolute;inset:0;background:color-mix(in oklab,var(--acc) 50%,var(--line2));opacity:.4;-webkit-mask:var(--hex) 0 0/56px 98px;mask:var(--hex) 0 0/56px 98px}
.card__art img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.card:hover .card__art img{transform:scale(1.04)}
.card__art .tile{position:relative}
.card__body{display:flex;flex-direction:column;gap:10px;padding:18px 20px 20px;flex:1}
.card__cats{display:flex;gap:6px;flex-wrap:wrap}
.card h3{font-size:1.15rem;font-weight:800;line-height:1.6}
.card h3 a::after{content:"";position:absolute;inset:0}
.card__ex{color:var(--mute);font-size:.93rem;line-height:1.9}
.meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;font-size:.82rem;color:var(--mute);margin-top:auto}
.meta span{display:inline-flex;align-items:center;gap:5px}
.meta .ic{width:15px;height:15px}
.card__cats a{position:relative;z-index:2}
.feat{display:grid;grid-template-columns:1.05fr .95fr;min-height:360px;border-radius:22px}
.feat .card__art{aspect-ratio:auto;height:100%}
.feat .card__body{padding:clamp(22px,4vw,44px);justify-content:center;gap:16px}
.feat h3{font-size:clamp(1.5rem,3vw,2.4rem);font-weight:900;line-height:1.5}
.feat .card__ex{font-size:1.02rem}
.feat .tile{width:168px}.feat .tile b{font-size:4.6rem}
@media(max-width:760px){.feat{grid-template-columns:1fr}.feat .card__art{aspect-ratio:16/9}}
.cats{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.cat{position:relative;display:flex;flex-direction:column;gap:2px;padding:16px;border-radius:14px;border:1px solid var(--line);background:var(--surface);overflow:hidden;transition:border-color .25s}
.cat:hover{border-color:var(--acc)}
.cat b{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:2.3rem;line-height:1.1;color:var(--acc-t)}
.cat span{font-weight:700}
.cat small{color:var(--mute);font-size:.8rem}
.ptcta{display:grid;grid-template-columns:1fr 1.2fr;gap:clamp(20px,4vw,48px);align-items:center;padding:clamp(20px,4vw,40px);border:1px solid var(--line2);border-radius:26px;background:var(--surface)}
.ptcta h2{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:900;margin-bottom:10px}
.ptcta p{color:var(--mute);margin-bottom:20px}
.mini-pt{display:grid;grid-template-columns:repeat(18,1fr);gap:3px;direction:ltr}
.mini-pt i{aspect-ratio:1;border-radius:3px;background:var(--c);opacity:.9}
@media(max-width:760px){.ptcta{grid-template-columns:1fr}}
.pagination{margin:44px 0 0}
.pagination .nav-links{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.page-numbers{min-width:44px;height:44px;padding:0 16px;display:grid;place-items:center;border-radius:999px;border:1px solid var(--line2);background:var(--surface);font-weight:700}
.page-numbers.current,.page-numbers:hover{background:var(--acc);color:var(--on-acc);border-color:var(--acc)}
.page-numbers.dots{border:0;background:none}

/* ───────── آرشیو / جستجو / ۴۰۴ ───────── */
.arch-h{display:flex;align-items:center;gap:28px;padding:clamp(28px,5vw,64px) 0 8px}
.arch-h h1{font-size:clamp(2rem,5vw,3.6rem);font-weight:900}
.arch-h p{color:var(--mute);max-width:40em;margin-top:8px}
.empty{text-align:center;padding:60px 0}
.empty .tile{margin:0 auto 20px}
.empty h1,.empty h2{font-size:1.8rem;font-weight:900;margin-bottom:8px}
.empty p{color:var(--mute);margin-bottom:20px}
.empty .searchform{max-width:480px;margin:0 auto}
.e404 .tile{width:190px}.e404 .tile b{font-size:3.8rem}

/* ───────── نوشته ───────── */
.post-hero{padding-top:clamp(24px,4vw,56px);max-width:980px}
.crumbs{display:flex;gap:8px;flex-wrap:wrap;font-size:.85rem;color:var(--mute);margin-bottom:14px;align-items:center}
.crumbs a:hover{color:var(--acc-t)}
.post-title{font-size:clamp(1.9rem,4.6vw,3.5rem);font-weight:900;line-height:1.4;margin-bottom:18px}
.post-meta{display:flex;align-items:center;gap:8px 18px;flex-wrap:wrap;color:var(--mute);font-size:.9rem}
.post-meta img{border-radius:50%}
.post-meta .who{display:flex;align-items:center;gap:8px;color:var(--ink);font-weight:700}
.post-meta span{display:inline-flex;align-items:center;gap:5px}
.post-meta .ic{width:16px;height:16px}
.post-cover{margin:28px 0 0;border-radius:24px;overflow:hidden;border:1px solid var(--line)}
.post-cover img{width:100%;max-height:560px;object-fit:cover}
.post-layout{display:grid;grid-template-columns:56px minmax(0,1fr) 270px;gap:clamp(20px,3vw,44px);padding-top:36px;align-items:start}
.cyl{position:sticky;top:calc(var(--hdr) + 28px);display:flex;flex-direction:column;align-items:center;gap:10px}
.cyl__tube{position:relative;width:26px;height:min(60vh,440px);border:2px solid var(--line2);border-radius:5px 5px 14px 14px;overflow:hidden;background:repeating-linear-gradient(to bottom,transparent 0 19px,var(--line2) 19px 20px)}
.cyl__liq{position:absolute;inset-inline:0;bottom:0;height:calc(var(--p,0) * 100%);background:linear-gradient(color-mix(in oklab,var(--acc) 85%,#fff),var(--acc));transition:height .12s linear}
.cyl__liq::before{content:"";position:absolute;top:-4px;inset-inline:-30%;height:8px;border-radius:50%;background:color-mix(in oklab,var(--acc) 75%,#fff);animation:wave 2.4s ease-in-out infinite alternate}
@keyframes wave{to{transform:translateX(18%)}}
.cyl__pct{font-weight:800;font-size:.85rem}
.post-aside{position:sticky;top:calc(var(--hdr) + 24px);display:flex;flex-direction:column;gap:20px}
.toc{font-size:.9rem}
.toc h4{font-size:.85rem;color:var(--mute);margin-bottom:8px;font-weight:700}
.toc ol{list-style:none;margin:0;padding:0;border-inline-start:2px solid var(--line)}
.toc a{display:block;padding:5px 14px;margin-inline-start:-2px;border-inline-start:2px solid transparent;color:var(--mute);line-height:1.6;transition:color .2s}
.toc a:hover{color:var(--ink)}
.toc a.on{color:var(--acc-t);border-color:var(--acc);font-weight:700}
.toc .l3 a{padding-inline-start:28px;font-size:.85rem}
.toc--m{display:none;border:1px solid var(--line);border-radius:14px;background:var(--surface);margin-bottom:24px}
.toc--m summary{padding:12px 16px;font-weight:700;cursor:pointer}
.toc--m .toc{padding:0 16px 12px}
.share{display:flex;gap:8px;flex-wrap:wrap}
.share .ibtn{width:38px;height:38px}
@media(max-width:1060px){.post-layout{grid-template-columns:minmax(0,1fr)}.cyl,.post-aside{display:none}.toc--m{display:block}}
.entry-content{font-size:1.08rem;line-height:2.1;overflow-wrap:break-word}
.entry-content>*+*{margin-top:1.3em}
.entry-content h2{font-size:1.75rem;font-weight:900;margin-top:2em;display:flex;align-items:center;gap:.5em}
.entry-content h2::before{content:"";flex:none;width:.6em;height:.6em;background:var(--acc);clip-path:polygon(25% 5%,75% 5%,100% 50%,75% 95%,25% 95%,0 50%)}
.entry-content h3{font-size:1.35rem;font-weight:800;margin-top:1.8em}
.entry-content a{color:var(--acc-t);text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:5px}
.entry-content ul,.entry-content ol{padding-inline-start:1.4em}
.entry-content li::marker{color:var(--acc)}
.entry-content li+li{margin-top:.3em}
.entry-content img{border-radius:14px}
.entry-content figure{margin-inline:0}
.entry-content figcaption,.wp-caption-text{font-size:.85rem;color:var(--mute);text-align:center;margin-top:8px}
.entry-content blockquote{margin-inline:0;padding:18px 22px;border-inline-start:4px solid var(--acc);background:var(--surface);border-radius:12px}
.entry-content blockquote p+p{margin-top:.6em}
.entry-content code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.88em;background:var(--surface2);border:1px solid var(--line);padding:1px 6px;border-radius:6px;direction:ltr;unicode-bidi:isolate}
.entry-content pre{direction:ltr;text-align:left;overflow:auto;padding:16px 20px;border-radius:14px;background:var(--surface2);border:1px solid var(--line)}
.entry-content pre code{background:none;border:0;padding:0}
.entry-content hr{border:0;height:1px;background:var(--line2)}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px}
.entry-content table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:420px}
.entry-content th,.entry-content td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:start}
.entry-content th{background:var(--surface2);font-weight:800}
.entry-content tr:last-child td{border-bottom:0}
.entry-content mark{background:color-mix(in oklab,var(--acc) 35%,transparent);color:inherit;padding:0 4px;border-radius:4px}
.note{--c:var(--acc);padding:16px 20px;border-radius:14px;border:1px solid color-mix(in oklab,var(--c) 50%,transparent);background:color-mix(in oklab,var(--c) 10%,var(--surface))}
.note>b{display:block;margin-bottom:2px}
.note--warn{--c:#ffb020}.note--danger{--c:#ff4d5e}.note--tip{--c:#2bd68f}.note--info{--c:#3d8bff}
.post-foot{margin-top:40px;display:flex;flex-direction:column;gap:28px}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.author{display:flex;gap:16px;align-items:center;padding:20px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}
.author img{border-radius:50%}
.author p{color:var(--mute);font-size:.92rem}
.pn{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.pn a{display:flex;flex-direction:column;gap:2px;padding:16px 20px;border:1px solid var(--line);border-radius:14px;background:var(--surface);transition:border-color .2s}
.pn a:hover{border-color:var(--acc)}
.pn small{color:var(--mute)}
.pn a:last-child{text-align:end}
@media(max-width:600px){.pn{grid-template-columns:1fr}.pn a:last-child{text-align:start}}
.comments{margin-top:48px}
.comments h2{font-size:1.5rem;font-weight:900;margin-bottom:18px}
.comments ol{list-style:none;padding:0;margin:0}
.comments .children{list-style:none;padding-inline-start:clamp(14px,4vw,40px)}
.comment-body{padding:16px 18px;margin-bottom:12px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}
.comment-author{display:flex;align-items:center;gap:10px;font-weight:700}
.comment-author img{border-radius:50%}
.comment-metadata{font-size:.8rem;color:var(--mute)}
.comment-content{margin-top:8px}
.reply a{font-size:.85rem;color:var(--acc-t);font-weight:700}
.comment-respond{margin-top:28px}
.comment-form{display:grid;gap:14px}
.comment-form input:not([type=checkbox]):not([type=submit]),.comment-form textarea{width:100%;padding:12px 16px;border-radius:14px;border:1.5px solid var(--line2);background:var(--surface);outline:0}
.comment-form input:focus,.comment-form textarea:focus{border-color:var(--acc)}
.comment-form .submit{background:var(--acc);color:var(--on-acc);font-weight:800;padding:12px 28px;border-radius:999px;border:0;justify-self:start;width:auto}
.comment-form-cookies-consent{font-size:.85rem;color:var(--mute);display:flex;gap:8px;align-items:center}

/* ───────── جدول تناوبی ───────── */
.pt-tools{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin:20px 0}
.pt-tools .searchform{flex:1;min-width:220px;max-width:340px}
.pt-tools .searchform input{padding:11px 20px}
.legend{display:flex;gap:6px;flex-wrap:wrap}
.legend button{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;border:1px solid var(--line2);background:var(--surface);font-size:.8rem;font-weight:600}
.legend button::before{content:"";width:10px;height:10px;border-radius:3px;background:var(--c)}
.legend button[aria-pressed=true]{border-color:var(--ink);background:var(--surface2)}
.pt-scroll{overflow-x:auto;padding-bottom:10px}
.pt{display:grid;grid-template-columns:repeat(18,minmax(0,1fr));grid-template-rows:repeat(7,auto) 12px repeat(2,auto);gap:4px;direction:ltr;min-width:860px}
.el{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;aspect-ratio:1/1.08;padding:2px;border-radius:7px;background:color-mix(in oklab,var(--c) 17%,var(--surface));border:1px solid color-mix(in oklab,var(--c) 60%,transparent);transition:transform .15s,opacity .2s;line-height:1.15;font-family:var(--font)}
.el i{position:absolute;top:2px;inset-inline-start:4px;font-style:normal;font-size:.6rem;color:var(--mute)}
.el b{font-size:1.15rem;font-weight:800;font-family:ui-monospace,Menlo,Consolas,monospace}
.el small{font-size:.58rem;color:var(--mute);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.el:hover{transform:scale(1.18);z-index:3}
.el.dim{opacity:.16}
.el.sel{outline:2px solid var(--ink);outline-offset:1px;z-index:2}
.pt-lab{grid-column:1/3;align-self:center;font-size:.72rem;color:var(--mute);text-align:center;direction:rtl}
.pt-detail{display:grid;grid-template-columns:auto 1fr;gap:clamp(18px,3vw,36px);margin-top:24px;padding:clamp(18px,3vw,32px);border:1px solid var(--line2);border-radius:22px;background:var(--surface)}
.pt-detail .tile{width:150px;border-color:var(--c)}
.pt-detail .tile b{font-size:3.6rem}
.pt-detail h2{font-size:1.8rem;font-weight:900}
.pt-detail dl{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px 20px;margin:14px 0 0}
.pt-detail dt{font-size:.8rem;color:var(--mute)}
.pt-detail dd{margin:0;font-weight:700}
.cfg{direction:ltr;text-align:left;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.95rem;overflow-x:auto;white-space:nowrap;margin-top:14px;padding:10px 14px;border-radius:10px;background:var(--surface2)}
@media(max-width:640px){.pt-detail{grid-template-columns:1fr}}
.c-alkali{--c:#ff6b57}.c-alkaline{--c:#ff9f43}.c-transition{--c:#4d94ff}.c-post{--c:#2ec4b6}.c-metalloid{--c:#b8e04a}
.c-nonmetal{--c:#58d68d}.c-halogen{--c:#f7d154}.c-noble{--c:#62d6f0}.c-lan{--c:#ff7eb6}.c-act{--c:#e0a06b}

/* ───────── فوتر ───────── */
.site-footer{margin-top:clamp(56px,8vw,110px);border-top:1px solid var(--line2);padding:44px 0 28px;overflow:hidden}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.foot h4{font-size:.9rem;color:var(--mute);margin-bottom:10px}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.foot a:hover{color:var(--acc-t)}
.foot p{color:var(--mute);max-width:32em}
.equil{margin:36px 0 0;padding:18px 24px;border:1px dashed var(--line2);border-radius:14px;text-align:center;font-size:1.15rem}
.foot-word{font-size:clamp(4rem,19vw,15rem);font-weight:900;line-height:.9;text-align:center;color:transparent;-webkit-text-stroke:1.5px var(--line2);margin-top:28px;letter-spacing:.04em;user-select:none;direction:ltr}
.foot-b{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:var(--mute);font-size:.85rem;margin-top:22px}
@media(max-width:760px){.foot{grid-template-columns:1fr}}
.totop{position:fixed;bottom:28px;inset-inline-start:24px;z-index:40;opacity:0;visibility:hidden;transition:.3s}
.totop.on{opacity:1;visibility:visible}
@media(max-width:899px){.totop{bottom:calc(96px + env(safe-area-inset-bottom))}}
.toast{position:fixed;left:50%;bottom:110px;transform:translate(-50%,20px);background:var(--ink);color:var(--bg);padding:10px 20px;border-radius:999px;font-weight:700;z-index:200;opacity:0;transition:.3s;pointer-events:none}
.toast.on{opacity:1;transform:translate(-50%,0)}
.alignwide{width:min(1100px,100vw - 32px)}
.alignleft{float:left;margin:0 1.5em 1em 0}.alignright{float:right;margin:0 0 1em 1.5em}.aligncenter{margin-inline:auto;display:block}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}