/* ============================================================
   جهان کتاب — «مرکّب»
   یک فرم چاپی، در مرورگر.
   ============================================================ */

/* ---------- 1. جوهرها و متغیرها ---------- */
:root{
  /* جوهرهای اسپات، برداشته از جلدهای خودِ نشر */
  --ink:        #16120E;   /* مرکب  */
  --ink-2:      #2A2219;
  --ink-soft:   #4A3F33;
  --stock:      #EAE3D2;   /* کاغذ تحریر */
  --stock-2:    #E0D6C0;
  --stock-3:    #F4EFE2;
  --saffron:    #E8961C;   /* زعفران — رنگ نشانه */
  --saffron-d:  #C97A0D;
  --vermilion:  #D93A28;   /* شنگرف */
  --vermilion-d:#B32C1C;
  --emerald:    #14A05C;   /* زنگار */
  --teal:       #0E4E4B;   /* لاجورد سبز */
  --teal-2:     #0A3B39;
  --lilac:      #8E86C8;
  --chartreuse: #B4CE3C;

  --paper-line: rgba(22,18,14,.16);
  --paper-line-2: rgba(22,18,14,.30);

  /* حروف */
  --f-disp: "Lalezar", "Vazirmatn", Tahoma, sans-serif;
  --f-body: "Vazirmatn", Tahoma, "Segoe UI", sans-serif;
  --f-read: "Noto Naskh Arabic", "Vazirmatn", serif;
  --f-mono: "IBM Plex Mono", ui-monospace, monospace;

  --fs-hero: clamp(2rem, 3.5vw, 3.15rem);
  --fs-h2:   clamp(1.85rem, 4vw, 3.25rem);
  --fs-h3:   clamp(1.15rem, 1.7vw, 1.5rem);
  --fs-body: clamp(.95rem, 1.02vw, 1.06rem);
  --fs-sm:   .855rem;
  --fs-xs:   .78rem;
  --fs-mono: .7rem;

  /* ستون سرلوحه و نوار رنگِ پای صفحه */
  --bandw: clamp(72px, 7.4vw, 116px);
  --barh: 42px;

  --gut: clamp(18px, 4vw, 60px);
  --pad-y: clamp(48px, 4.6vw, 78px);
  --maxw: 1380px;

  --ease: cubic-bezier(.22,.72,.24,1);
  --ease-snap: cubic-bezier(.16,1.02,.3,1);

  /* بافت کاغذ — نویز چاپی */
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='linear' slope='.4'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='240' height='240' fill='%23fff'/%3E%3Crect width='240' height='240' filter='url(%23n)'/%3E%3C/svg%3E");
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  font-family:var(--f-body);
  font-size:var(--fs-body);
  line-height:1.75;
  color:var(--ink);
  background:var(--stock);
  overflow-x:hidden;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%}
[hidden]{display:none !important}
/* اندازهٔ پیش‌فرضِ نمادها؛ هر جا کلاس دارد، همان‌جا تعیین می‌شود */
svg:not([class]){width:15px;height:15px;flex:none}
.defs{position:absolute;width:0;height:0;overflow:hidden}
button,input,select{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer;padding:0}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}

:focus-visible{outline:2.5px solid var(--saffron);outline-offset:3px}
.sec--ink :focus-visible,.sec--teal :focus-visible{outline-color:var(--saffron)}
.sec--red :focus-visible{outline-color:var(--stock)}

.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;border:0}

.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gut)}
.wrap--wide{max-width:1600px}

/* ---------- 2. اجزای پایه ---------- */
/* مونو فقط برای رشته‌های لاتین — روی فارسی حروف را از هم می‌شکند */
.mono{font-family:var(--f-mono);font-size:var(--fs-mono);letter-spacing:.06em;
  font-variant-numeric:tabular-nums;direction:ltr;unicode-bidi:isolate}
/* برچسبِ فنی به فارسی */
.tag{font-family:var(--f-body);font-weight:700;font-size:.62rem}
.num{font-variant-numeric:tabular-nums}
.disp{font-family:var(--f-disp);font-weight:400;line-height:1.3}

/* حروف تُهی — برگرفته از نشانهٔ نشر که خطیِ تُهی است */
.hollow{
  color:transparent;
  -webkit-text-stroke:1.6px currentColor;
  paint-order:stroke fill;
}
@supports not (-webkit-text-stroke: 1px black){ .hollow{color:inherit} }

/* علامت رجیستر چاپ */
.reg{width:17px;height:17px;opacity:.42;flex:none}

/* نوار رنگ — نوار کنترل چاپخانه */
.colorbar{display:flex;height:11px;width:100%}
.colorbar i{flex:1;display:block}

/* دکمه‌ها — حسّ فشردنِ حروف سربی */
.btn{
  display:inline-flex;align-items:center;gap:.55em;
  font-weight:700;font-size:var(--fs-sm);
  padding:.82em 1.5em;border:1.5px solid var(--ink);
  background:var(--ink);color:var(--stock);
  box-shadow:4px 4px 0 rgba(22,18,14,.22);
  transition:transform .12s var(--ease),box-shadow .12s var(--ease),background .18s;
}
.btn:hover{transform:translate(2px,2px);box-shadow:2px 2px 0 rgba(22,18,14,.2)}
.btn:active{transform:translate(4px,4px);box-shadow:0 0 0 rgba(0,0,0,0)}
.btn--ghost{background:transparent;color:var(--ink);box-shadow:4px 4px 0 rgba(22,18,14,.14)}
.btn--ghost:hover{background:var(--ink);color:var(--stock)}
.btn--saffron{background:var(--saffron);border-color:var(--ink);color:var(--ink)}
.btn--light{background:var(--stock);color:var(--ink);border-color:var(--stock);
  box-shadow:4px 4px 0 rgba(0,0,0,.3)}
.btn--light:hover{background:var(--saffron);border-color:var(--saffron)}
.btn--sm{padding:.55em 1em;font-size:var(--fs-xs);box-shadow:3px 3px 0 rgba(22,18,14,.18)}
.btn[disabled]{opacity:.45;pointer-events:none}

/* سرصفحهٔ بخش‌ها */
.sec-head{display:flex;align-items:baseline;gap:clamp(14px,2.5vw,32px);
  margin-bottom:clamp(20px,2.3vw,34px);flex-wrap:wrap}
.sec-head h2{font-family:var(--f-disp);font-weight:400;font-size:var(--fs-h2);
  line-height:1.15;margin:0}
.sec-head .rule{flex:1 1 90px;height:0;border-top:1.5px solid currentColor;opacity:.28;
  transform:translateY(-.35em)}
.sec-head .meta{font-family:var(--f-body);font-size:var(--fs-xs);opacity:.6;font-weight:600}

/* زمینه‌ها */
.sec{position:relative;padding-block:var(--pad-y)}
.sec--paper{background-color:var(--stock);background-image:var(--grain);
  background-size:240px;background-blend-mode:multiply}
.sec--paper2{background-color:var(--stock-2);background-image:var(--grain);
  background-size:240px;background-blend-mode:multiply}
.sec--ink{background-color:var(--ink);color:var(--stock);
  background-image:radial-gradient(rgba(234,227,210,.05) 1px,transparent 1.15px);
  background-size:5px 5px}
.sec--red{background-color:var(--vermilion);color:#FCEFE4;
  background-image:var(--grain);background-size:240px;background-blend-mode:multiply}
.sec--teal{background-color:var(--teal);color:#DCE9E4;
  background-image:radial-gradient(rgba(220,233,228,.055) 1px,transparent 1.15px);
  background-size:5px 5px}

/* علائم رجیستر گوشهٔ بخش‌ها */
.sec > .corner{position:absolute;pointer-events:none;color:currentColor}
.corner--tr{inset-block-start:16px;inset-inline-end:16px}
.corner--tl{inset-block-start:16px;inset-inline-start:16px}
.corner--br{inset-block-end:16px;inset-inline-end:16px}

/* ظهور تدریجی هنگام اسکرول */
.rise{opacity:0;transform:translateY(14px);
  transition:opacity .7s var(--ease),transform .7s var(--ease)}
.rise.in{opacity:1;transform:none}

/* ---------- 3. جدایشِ رنگ — امضای طرح ---------- */
/* در حالت عادی، در رجیستر. دست که بزنی، جوهر می‌لغزد. */
.cover{position:relative;aspect-ratio:374/500;background:#0B0906;overflow:hidden;
  box-shadow:0 1px 2px rgba(22,18,14,.3),0 10px 26px -12px rgba(22,18,14,.5)}
.cover img.base{width:100%;height:100%;object-fit:cover;
  transition:opacity .34s var(--ease)}
.cover .sep{position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:0;pointer-events:none;
  transition:opacity .34s var(--ease),transform .5s var(--ease-snap)}

.sepable:hover .cover img.base,
.sepable:focus-visible .cover img.base{opacity:0}
.sepable:hover .cover .sep,
.sepable:focus-visible .cover .sep{opacity:1;mix-blend-mode:screen}
.sepable:hover .cover .sep-r,.sepable:focus-visible .cover .sep-r{
  filter:url(#chan-r);transform:translate(5px,-4px)}
.sepable:hover .cover .sep-g,.sepable:focus-visible .cover .sep-g{
  filter:url(#chan-g);transform:translate(0,1px)}
.sepable:hover .cover .sep-b,.sepable:focus-visible .cover .sep-b{
  filter:url(#chan-b);transform:translate(-5px,4px)}

/* جلدِ تایپوگرافیک — سبک خانگی نشر، ساخته‌شده با CSS */
.cover--typo{background:var(--c,#8E86C8);display:grid;
  grid-template-rows:1.05fr auto auto 1fr auto;
  align-items:center;justify-items:center;padding:9% 8% 7%;text-align:center}
.cover--typo .t-title{font-family:var(--f-disp);color:#FBF3E2;
  font-size:clamp(1rem,2.05vw,1.5rem);line-height:1.32;align-self:end}
.cover--typo .t-orn{color:rgba(251,243,226,.75);font-size:.8rem;margin-block:.7em;
  letter-spacing:.5em}
.cover--typo .t-sub{font-size:.72rem;color:rgba(251,243,226,.85);font-weight:600;
  align-self:start}
.cover--typo .t-logo{width:34%;opacity:.9;align-self:end;grid-row:5}

/* ---------- 4. سربرگ ثابت ---------- */
.progress{position:fixed;inset-block-start:0;inset-inline-start:0;height:2px;
  background:var(--saffron);width:0;z-index:120;transition:width .08s linear}

.rail{position:sticky;inset-block-start:0;z-index:100;background:var(--ink);
  color:var(--stock);border-block-end:1px solid rgba(234,227,210,.13)}
.rail__in{display:flex;align-items:center;gap:clamp(10px,2vw,26px);
  height:60px;max-width:1600px;margin-inline:auto;padding-inline:var(--gut)}
.rail__logo{display:flex;align-items:center;gap:10px;flex:none}
.rail__logo img{height:23px;width:auto}
.rail__logo span{font-size:.66rem;font-family:var(--f-body);font-weight:600;opacity:.45;
  padding-inline-start:10px;border-inline-start:1px solid rgba(234,227,210,.22);
  white-space:nowrap}
.rail__nav{display:flex;gap:clamp(8px,1.4vw,22px);margin-inline-start:auto;font-size:var(--fs-sm)}
.rail__nav a{font-weight:600;opacity:.78;padding:.35em .1em;position:relative;
  transition:opacity .2s}
.rail__nav a::after{content:"";position:absolute;inset-block-end:.05em;
  inset-inline:0;height:1.5px;background:var(--saffron);transform:scaleX(0);
  transform-origin:inline-end;transition:transform .28s var(--ease)}
.rail__nav a:hover{opacity:1}
.rail__nav a:hover::after{transform:scaleX(1);transform-origin:inline-start}
.rail__acts{display:flex;align-items:center;gap:6px;flex:none}
.icbtn{width:38px;height:38px;display:grid;place-items:center;border-radius:2px;
  transition:background .18s;position:relative}
.icbtn:hover{background:rgba(234,227,210,.1)}
.icbtn svg{width:18px;height:18px}
.badge{position:absolute;inset-block-start:4px;inset-inline-start:4px;min-width:16px;
  height:16px;padding-inline:4px;border-radius:9px;background:var(--saffron);
  color:var(--ink);font-size:.62rem;font-weight:800;display:grid;place-items:center;
  transform:scale(0);transition:transform .3s var(--ease-snap)}
.badge.on{transform:scale(1)}
.rail__now{display:none;align-items:center;gap:7px;font-size:var(--fs-xs);
  padding-inline:10px;color:var(--saffron);max-width:210px}
.rail__now.on{display:flex}
.rail__now b{font-weight:600;white-space:nowrap;overflow:hidden;
  text-overflow:ellipsis;color:rgba(234,227,210,.85)}
.eq{display:flex;gap:2px;align-items:flex-end;height:13px;flex:none}
.eq i{width:2px;background:currentColor;animation:eq .9s ease-in-out infinite}
.eq i:nth-child(2){animation-delay:.15s}
.eq i:nth-child(3){animation-delay:.3s}
.eq i:nth-child(4){animation-delay:.45s}
@keyframes eq{0%,100%{height:3px}50%{height:13px}}

/* ---------- 5. سرصفحهٔ اصلی — جلدِ سایت ---------- */
.hero{position:relative;height:calc(100svh - 60px);min-height:580px;
  display:flex;background:var(--ink);overflow:hidden}

.hero__field{position:relative;flex:1;overflow:hidden;cursor:grab;
  touch-action:pan-y;background:#0D0A07}
.hero__field.grabbing{cursor:grabbing}
/* لنگرِ فیزیکی: ریاضیِ جابه‌جایی مستقل از راستای نوشتار است */
.plane{position:absolute;top:0;left:0;
  will-change:transform;display:grid;grid-template-columns:repeat(3,max-content)}
.tile{display:grid;gap:var(--cellgap);
  grid-template-columns:repeat(var(--cols),var(--cellw));
  grid-auto-rows:var(--cellh);padding:calc(var(--cellgap)/2)}
.tile .chip{position:relative;background:#0B0906;
  box-shadow:0 2px 5px rgba(0,0,0,.5),0 14px 30px -14px rgba(0,0,0,.85);
  transition:transform .35s var(--ease-snap),box-shadow .35s var(--ease);cursor:pointer}
.tile .chip img{width:100%;height:100%;object-fit:cover;
  transition:opacity .5s var(--ease)}
.tile .chip:hover{transform:translateY(-7px) scale(1.035);z-index:3;
  box-shadow:0 6px 12px rgba(0,0,0,.5),0 26px 46px -16px rgba(0,0,0,.95)}
.tile .chip::after{content:"";position:absolute;inset:0;
  box-shadow:inset 0 0 0 1px rgba(234,227,210,.09);pointer-events:none}

/* ورود صفحه: صفحات رنگ از رجیستر خارج‌اند و جا می‌افتند */
.plane.booting .chip img{opacity:0}
.plane.booting .chip{transform:translate(var(--bx),var(--by))}

.hero__vig{position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(to bottom,rgba(13,10,7,.72) 0%,rgba(13,10,7,0) 26%),
    linear-gradient(to top,rgba(13,10,7,.86) 0%,rgba(13,10,7,0) 42%),
    radial-gradient(120% 90% at 50% 50%,rgba(13,10,7,0) 40%,rgba(13,10,7,.6) 100%)}
.hero__dots{position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(0,0,0,.55) 1px,transparent 1.2px);
  background-size:4px 4px;mix-blend-mode:multiply}

/* ستون زعفرانی — دقیقاً مثل ستون سرلوحهٔ جلد مجله */
.hero__band{flex:none;width:var(--bandw);background:var(--saffron);
  display:flex;flex-direction:column;align-items:center;gap:13px;
  padding-block:18px calc(var(--barh) + 15px);position:relative;z-index:8;
  box-shadow:-14px 0 34px -10px rgba(0,0,0,.6)}
.hero__band::after{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:var(--grain);background-size:240px;mix-blend-mode:multiply;opacity:.6}
.hero__mast{flex:1;position:relative;width:100%}
/* ۹۰ درجه چرخیده، پس عرضِ دیداری = طول تصویر ÷ ۳٫۵ (نسبت نشانه) */
.hero__mast img{position:absolute;inset-block-start:50%;inset-inline-start:50%;
  width:min(calc(var(--bandw) * 3), 62vh);max-width:none;height:auto;
  transform:translate(50%,-50%) rotate(90deg);
  filter:brightness(0);opacity:.92}
.hero__tab{background:var(--ink);color:var(--saffron);font-family:var(--f-body);
  font-weight:700;font-size:.6rem;padding:5px 6px;white-space:nowrap;
  align-self:stretch;text-align:center;margin-inline:7px}
.hero__est{font-family:var(--f-body);font-weight:700;font-size:.68rem;color:var(--ink);
  writing-mode:vertical-rl;transform:rotate(180deg);opacity:.68;flex:none}

/* ستون کناری — درست کنارِ سرلوحه، مثل فهرست مطالبِ روی جلد */
.hero__side{position:absolute;z-index:5;
  inset-block:24px calc(var(--barh) + 12px);
  inset-inline-end:calc(var(--bandw) + clamp(14px,1.7vw,26px));
  display:none;flex-direction:column;gap:16px;pointer-events:none;max-width:190px}
@media (min-width:1080px){.hero__side{display:flex}}
.hero__side > *{pointer-events:auto}
/* بلوکِ تینت — همان‌طور که فهرست روی جلد، روی زمینهٔ تخت می‌نشیند */
.hero__toc{display:flex;flex-direction:column;gap:2px;margin-block:auto;
  background:rgba(11,9,6,.8);padding:15px 15px 17px;
  box-shadow:inset 0 0 0 1px rgba(234,227,210,.12)}
.hero__hint{background:rgba(11,9,6,.8);padding:7px 11px;
  box-shadow:inset 0 0 0 1px rgba(234,227,210,.1)}
.hero__toc b{font-family:var(--f-body);font-weight:700;font-size:.58rem;color:var(--saffron);
  letter-spacing:.14em;margin-block-end:8px;opacity:.9}
.hero__toc a{display:flex;align-items:center;gap:7px;font-size:.735rem;
  color:rgba(234,227,210,.62);transition:color .2s;font-weight:500}
.hero__toc a::before{content:"";width:3.5px;height:3.5px;background:currentColor;
  flex:none;border-radius:50%}
.hero__toc a:hover{color:var(--saffron)}

/* پانل عنوان — همان پانل رنگی روی جلد کتاب‌ها */
.hero__lede{position:absolute;z-index:6;inset-block-end:calc(var(--barh) + 16px);
  inset-inline-start:clamp(20px,3.4vw,58px);max-width:min(470px,50vw)}
.hero__panel{background:var(--stock);color:var(--ink);
  padding:clamp(22px,2.6vw,34px) clamp(22px,2.8vw,38px) clamp(20px,2.4vw,30px);
  box-shadow:10px 10px 0 rgba(0,0,0,.34);position:relative}
.hero__panel::after{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:var(--grain);background-size:240px;mix-blend-mode:multiply;opacity:.7}
.hero__eyebrow{display:flex;align-items:center;gap:9px;font-family:var(--f-body);font-weight:700;
  font-size:.62rem;letter-spacing:.12em;color:var(--vermilion);margin-block-end:14px}
.hero__eyebrow i{flex:1;height:0;border-top:1px solid var(--paper-line-2);
  max-width:56px}
.hero h1{font-family:var(--f-disp);font-weight:400;font-size:var(--fs-hero);
  line-height:1.06;margin:0}
.hero h1 .l2{display:block;color:transparent;-webkit-text-stroke:1.8px var(--vermilion);
  margin-block-start:.04em}
@supports not (-webkit-text-stroke:1px black){.hero h1 .l2{color:var(--vermilion)}}
.hero__sub{margin-block-start:16px;font-size:var(--fs-sm);line-height:1.85;
  max-width:44ch;color:var(--ink-soft)}
.hero__cta{display:flex;flex-wrap:wrap;gap:11px;align-items:center;margin-block-start:22px}
.hero__link{font-size:var(--fs-xs);font-weight:700;color:var(--vermilion);
  display:inline-flex;align-items:center;gap:6px;border-block-end:1.5px solid transparent;
  transition:border-color .22s}
.hero__link:hover{border-color:var(--vermilion)}

.hero__hint{display:flex;align-items:center;gap:9px;
  font-family:var(--f-body);font-weight:600;font-size:.72rem;
  color:rgba(234,227,210,.55)}
.hero__hint .reg{width:14px;height:14px;animation:nudge 3.4s var(--ease) infinite}
@keyframes nudge{0%,72%,100%{transform:translateX(0)}82%{transform:translateX(-9px)}}

.hero__bar{position:absolute;z-index:7;inset-block-end:0;inset-inline:0}
.hero__bar .swatches{display:flex;background:var(--ink)}
.hero__bar .sw{flex:1;display:flex;align-items:center;gap:7px;padding:6px 10px;
  font-family:var(--f-mono);font-size:.55rem;letter-spacing:.05em;
  color:rgba(234,227,210,.45);border-inline-start:1px solid rgba(234,227,210,.09)}
.hero__bar .sw i{width:11px;height:11px;flex:none}
.hero__bar .sw b{font-family:var(--f-body);font-weight:600;font-size:.62rem;
  color:rgba(234,227,210,.72)}
@media (max-width:820px){.hero__bar .sw:nth-child(n+4){display:none}}

@media (max-width:900px){
  .hero{height:auto;min-height:0;flex-direction:column}
  /* flex-basis:0 ارتفاع را صفر می‌کند؛ در ستون باید از رشد در بیاید */
  .hero__field{flex:none;height:clamp(300px,44vh,420px)}
  .hero__band{width:100%;height:56px;flex-direction:row;justify-content:space-between;
    align-items:center;padding:0 16px;box-shadow:none}
  .hero__mast{flex:none;position:static;width:auto;display:flex;align-items:center}
  .hero__mast img{position:static;width:auto;height:24px;transform:none}
  .hero__tab{writing-mode:horizontal-tb;margin:0;padding:5px 9px}
  .hero__est{writing-mode:horizontal-tb;transform:none;margin:0;font-size:.68rem}
  .hero__lede{position:static;max-width:none;padding:20px var(--gut) 26px;
    background:var(--ink)}
  .hero__panel{box-shadow:6px 6px 0 rgba(0,0,0,.4)}
  .hero__side,.hero__bar{display:none}
}
@media (max-width:640px){
  .hero__est{display:none}
}

/* ---------- ۵ب. منوی موبایل ---------- */
.burger{display:none;width:38px;height:38px;place-items:center;align-content:center;
  border-radius:2px;transition:background .18s}
.burger:hover{background:rgba(234,227,210,.1)}
.burger i{display:block;width:17px;height:1.8px;background:currentColor;
  transition:transform .3s var(--ease-snap),opacity .18s}
.burger i + i{margin-block-start:4px}
.burger.on i:nth-child(1){transform:translateY(5.8px) rotate(45deg)}
.burger.on i:nth-child(2){opacity:0}
.burger.on i:nth-child(3){transform:translateY(-5.8px) rotate(-45deg)}

.menu{position:fixed;inset-block-start:60px;inset-inline:0;z-index:99;
  background:var(--ink);color:var(--stock);
  border-block-end:2px solid var(--saffron);
  box-shadow:0 26px 50px -18px rgba(0,0,0,.8);
  max-height:calc(100vh - 60px);max-height:calc(100dvh - 60px);overflow-y:auto;
  transform:translateY(-101%);visibility:hidden;
  transition:transform .4s var(--ease-snap),visibility 0s .4s}
.menu.on{transform:none;visibility:visible;transition-delay:0s,0s}
.menu__in{padding:10px var(--gut) 0}
.menu__nav a{display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  font-family:var(--f-disp);font-size:1.45rem;padding:.42em 0;
  border-block-end:1px solid rgba(234,227,210,.13)}
.menu__nav a span{font-family:var(--f-body);font-weight:600;font-size:.66rem;opacity:.4}
.menu__h{font-family:var(--f-body);font-weight:700;font-size:.68rem;opacity:.42;
  margin-block:20px 8px}
.menu__cats{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
.menu__cats a{display:flex;justify-content:space-between;align-items:baseline;gap:8px;
  font-size:.82rem;font-weight:500;padding:.44em 0;
  border-block-end:1px solid rgba(234,227,210,.1)}
.menu__cats a em{font-style:normal;font-size:.64rem;opacity:.38}
.menu .colorbar{margin-block-start:20px}

@media (max-width:900px){
  .rail__logo span{display:none}
  .rail__nav{display:none}
  .burger{display:grid}
  .rail__in{gap:8px}
  .rail__acts{margin-inline-start:auto}
}
@media (min-width:901px){
  .menu{display:none}
}

/* ---------- 6. حروف‌چین — قفسهٔ حروف ---------- */
.case{border:2.5px solid var(--ink);background:var(--ink-2);
  padding:10px;box-shadow:12px 12px 0 rgba(22,18,14,.13);position:relative}
.case__grid{display:grid;grid-template-columns:repeat(6,1fr);gap:7px}
.cell{position:relative;background:var(--stock-3);border:1px solid rgba(22,18,14,.25);
  padding:13px 14px 11px;min-height:88px;display:flex;flex-direction:column;
  justify-content:space-between;text-align:start;overflow:hidden;
  box-shadow:inset 0 2px 5px rgba(22,18,14,.13);
  transition:background .26s var(--ease),color .26s var(--ease),transform .2s var(--ease)}
.cell__name{font-family:var(--f-disp);font-weight:400;line-height:1.22;
  font-size:clamp(.86rem,1.05vw,1.08rem);position:relative;z-index:2}
.cell__n{font-family:var(--f-body);font-weight:700;font-size:.68rem;opacity:.5;
  position:relative;z-index:2;font-variant-numeric:tabular-nums}
.cell::before{content:"";position:absolute;inset:0;background:var(--ci,var(--vermilion));
  transform:scaleY(0);transform-origin:bottom;transition:transform .34s var(--ease-snap)}
.cell:hover{color:var(--stock-3);transform:translateY(-2px)}
.cell:hover::before{transform:scaleY(1)}
.cell:hover .cell__n{opacity:.8}
.cell.act{color:var(--stock-3)}
.cell.act::before{transform:scaleY(1)}
.cell.act .cell__n{opacity:.85}
.cell--wide{grid-column:span 2}
.cell--tall{grid-row:span 2}
.cell--big{grid-column:span 2;grid-row:span 2;min-height:0}
.cell--big .cell__name{font-size:clamp(1.15rem,1.9vw,1.75rem)}
.cell--all{background:var(--saffron);border-color:var(--ink)}
.cell--all::before{background:var(--ink)}

@media (max-width:860px){
  .case__grid{grid-template-columns:repeat(2,1fr)}
  .cell--wide,.cell--big{grid-column:span 2}
  .cell--tall,.cell--big{grid-row:span 1}
  .cell{min-height:70px}
}

/* ---------- 7. قفسه ---------- */
.shelf__bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding-block:14px;margin-block-end:clamp(22px,3vw,38px);
  border-block:1.5px solid var(--paper-line)}
.field{display:flex;align-items:center;gap:8px;border:1.5px solid var(--paper-line-2);
  padding:.5em .8em;background:rgba(255,255,255,.42);min-width:min(280px,100%)}
.field input{border:0;background:none;outline:none;width:100%;font-size:var(--fs-sm)}
.field svg{width:15px;height:15px;opacity:.5;flex:none}
.seg{display:flex;border:1.5px solid var(--paper-line-2);margin-inline-start:auto}
.seg button{padding:.5em .9em;font-size:var(--fs-xs);font-weight:600;opacity:.62;
  border-inline-start:1.5px solid var(--paper-line-2);transition:.2s}
.seg button:first-child{border-inline-start:0}
.seg button.on{background:var(--ink);color:var(--stock);opacity:1}
.sel{border:1.5px solid var(--paper-line-2);background:rgba(255,255,255,.42);
  padding:.55em .8em;font-size:var(--fs-xs);font-weight:600;outline:none}
.chipline{display:flex;align-items:center;gap:8px;font-size:var(--fs-xs);font-weight:700}
.chipline .x{width:19px;height:19px;display:grid;place-items:center;background:var(--ink);
  color:var(--stock);border-radius:50%;font-size:.7rem;line-height:1}

.grid{display:grid;gap:clamp(22px,2.6vw,40px) clamp(16px,2vw,28px);
  grid-template-columns:repeat(auto-fill,minmax(178px,1fr))}
.card{display:flex;flex-direction:column;gap:11px;text-align:start;position:relative}
.card__cv{position:relative;transition:transform .35s var(--ease-snap)}
.card:hover .card__cv,.card:focus-visible .card__cv{transform:translateY(-6px)}
.card__ribbon{position:absolute;z-index:3;inset-block-start:9px;inset-inline-start:-5px;
  background:var(--ink);color:var(--saffron);font-size:.6rem;font-weight:700;
  padding:2px 8px;box-shadow:3px 3px 0 rgba(22,18,14,.2)}
.card__t{font-family:var(--f-disp);font-weight:400;line-height:1.3;font-size:1.04rem}
.card__open{font:inherit;color:inherit;text-align:start;display:block;width:100%}
.card__open:focus-visible{outline-offset:2px}
.card__a{font-size:var(--fs-xs);opacity:.65;line-height:1.6;font-weight:500}
.card__f{display:flex;align-items:center;gap:8px;margin-block-start:auto;
  padding-block-start:8px;border-block-start:1px solid var(--paper-line)}
.card__ink{width:9px;height:9px;flex:none}
.card__cat{font-size:.68rem;font-weight:700;opacity:.55}
.card__p{margin-inline-start:auto;font-size:.78rem;font-weight:700;
  font-variant-numeric:tabular-nums}
/* کنش‌ها روی خودِ جلد می‌نشینند — کارت سبک می‌ماند */
.card__acts{position:absolute;z-index:4;inset-block-end:8px;inset-inline-start:8px;
  display:flex;gap:5px;opacity:0;transform:translateY(6px);
  transition:opacity .24s var(--ease),transform .28s var(--ease-snap)}
.card:hover .card__acts,.card:focus-within .card__acts{opacity:1;transform:none}
.mini{width:32px;height:32px;display:grid;place-items:center;
  border:1.5px solid rgba(22,18,14,.5);background:rgba(244,239,226,.94);
  color:var(--ink);backdrop-filter:blur(3px);transition:.16s}
.mini svg{width:13px;height:13px}
.mini:hover{background:var(--ink);color:var(--stock);border-color:var(--ink)}
@media (hover:none){.card__acts{opacity:1;transform:none}}

/* نمای فهرستی — کاتالوگ فنی */
.list{border-block-start:1.5px solid var(--paper-line);display:none}
.list.on{display:block}
.grid.off{display:none}
.row{display:grid;grid-template-columns:6px 2.3fr 1.5fr 1fr .55fr .8fr auto;
  gap:clamp(8px,1.4vw,20px);align-items:center;padding:.85em .5em;text-align:start;
  border-block-end:1px solid var(--paper-line);width:100%;
  transition:background .18s}
.row:hover{background:rgba(255,255,255,.55)}
.row i.ink{width:6px;height:26px;display:block}
.row .t{font-weight:700;font-size:.93rem}
.row .a,.row .c{font-size:var(--fs-xs);opacity:.66}
.row .n{font-family:var(--f-body);font-weight:700;font-size:var(--fs-mono);opacity:.55}
.row .p{font-size:.8rem;font-weight:700;font-variant-numeric:tabular-nums;text-align:end}
.row .go{opacity:.4}
.list__head{display:grid;grid-template-columns:6px 2.3fr 1.5fr 1fr .55fr .8fr auto;
  gap:clamp(8px,1.4vw,20px);padding:.5em .5em;font-family:var(--f-body);font-weight:700;
  font-size:.58rem;letter-spacing:.08em;opacity:.45;border-block-end:1.5px solid var(--paper-line)}
@media (max-width:820px){
  .row,.list__head{grid-template-columns:6px 1fr auto}
  .row .c,.row .n,.list__head span:nth-child(n+4){display:none}
}

.empty{text-align:center;padding:clamp(40px,7vw,84px) 20px;
  border:2px dashed var(--paper-line-2)}
.empty h3{font-family:var(--f-disp);font-weight:400;font-size:1.5rem;margin-block-end:8px}
.empty p{font-size:var(--fs-sm);opacity:.66;max-width:42ch;margin-inline:auto}

/* ---------- تنظیم ریتم عمودی ---------- */
/* حروف‌چین و قفسه یک سطحِ کاغذی‌اند؛ میانشان شکاف نمی‌خواهیم */
#cases{padding-block-end:clamp(26px,2.6vw,40px)}
#shelf .sec-head{margin-bottom:clamp(14px,1.6vw,22px)}
.shelf__bar{padding-block:11px;margin-block-end:clamp(18px,2vw,28px)}
.arch{margin-block-start:clamp(32px,3.4vw,52px)}
.subs{margin-block-start:clamp(38px,4vw,66px)}
.lead{margin-block-end:clamp(24px,2.6vw,38px)}
.foot{padding-block-start:clamp(38px,4vw,64px)}
.colophon{margin-block-start:clamp(28px,3vw,46px)}