/* ==========================================================================
   Fars Aquatic / فارس آبزی — Design System v1 (prototype)  |  RTL-first, mobile-first
   Tokens → base → layout → components → sections
   ========================================================================== */
@font-face{font-family:"Vazirmatn";src:url(../fonts/Vazirmatn-Regular.woff2) format("woff2");font-weight:400;font-style:normal;font-display:optional}
@font-face{font-family:"Vazirmatn";src:url(../fonts/Vazirmatn-Bold.woff2) format("woff2");font-weight:700;font-style:normal;font-display:optional}

:root{
  /* color */
  --navy-900:#0B2A43; --ocean-700:#0B5C86; --aqua-500:#1AA6C4; --green-500:#5DB946;
  --mist-50:#F2F7FA; --slate-700:#33475B; --amber-700:#8A5A12; --red-700:#B3261E; --ok-700:#1B7F3B;
  --white:#fff; --line:#D5E1E9; --line-dark:rgba(255,255,255,.18);
  /* type */
  --font:"Vazirmatn",Tahoma,"Segoe UI",system-ui,-apple-system,sans-serif;
  --fs-hero:clamp(2rem,1.35rem + 2.6vw,3.25rem);
  --fs-h2:clamp(1.625rem,1.3rem + 1.3vw,2.25rem);
  --fs-h3:clamp(1.125rem,1.05rem + .4vw,1.375rem);
  --fs-lead:clamp(1.0625rem,1rem + .3vw,1.25rem);
  --fs-body:1rem; --fs-small:.875rem;
  /* space (8px base) */
  --s1:.25rem; --s2:.5rem; --s3:.75rem; --s4:1rem; --s5:1.5rem; --s6:2rem; --s7:3rem; --s8:4rem; --s9:6rem;
  /* shape */
  --r-s:8px; --r-m:12px; --r-l:20px;
  --shadow-1:0 1px 2px rgba(11,42,67,.08),0 6px 18px rgba(11,42,67,.07);
  --shadow-2:0 2px 4px rgba(11,42,67,.1),0 14px 36px rgba(11,42,67,.14);
  --container:1200px;
  --header-h:68px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--header-h) + 12px)}
body{margin:0;font-family:var(--font);font-size:var(--fs-body);line-height:1.9;color:var(--slate-700);background:var(--white);text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;display:block}
img{height:auto}
h1,h2,h3,h4{color:var(--navy-900);margin:0 0 var(--s4);line-height:1.45;font-weight:700}
p{margin:0 0 var(--s4)}
a{color:var(--ocean-700);text-underline-offset:4px}
a:hover{color:var(--navy-900)}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid var(--aqua-500);outline-offset:3px;border-radius:4px}
.ltr{direction:ltr;unicode-bidi:isolate;display:inline-block}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip-link{position:absolute;inset-inline-start:var(--s4);top:-80px;background:var(--navy-900);color:#fff;padding:var(--s3) var(--s4);border-radius:var(--r-s);z-index:100}
.skip-link:focus{top:var(--s3)}

/* ---------- layout ---------- */
.container{width:min(100% - 2rem,var(--container));margin-inline:auto}
.section{padding-block:clamp(3rem,7vw,6rem)}
.section--mist{background:var(--mist-50)}
.section--dark{background:var(--navy-900);color:#d6e4ee}
.section--dark h2,.section--dark h3{color:#fff}
.section__head{max-width:46rem;margin-bottom:var(--s7)}
.section__head--center{margin-inline:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:var(--s2);font-size:var(--fs-small);font-weight:700;color:var(--ocean-700);margin-bottom:var(--s3);letter-spacing:0}
.eyebrow::before{content:"";width:28px;height:3px;border-radius:2px;background:var(--green-500)}
.section--dark .eyebrow,.hero .eyebrow{color:#9fe0ee}
h2{font-size:var(--fs-h2)} h3{font-size:var(--fs-h3)}
.lead{font-size:var(--fs-lead);line-height:2}
.grid{display:grid;gap:var(--s5)}
@media(min-width:640px){.grid--2{grid-template-columns:repeat(2,1fr)}.grid--3{grid-template-columns:repeat(2,1fr)}}
@media(min-width:980px){.grid--3{grid-template-columns:repeat(3,1fr)}.grid--4{grid-template-columns:repeat(4,1fr)}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--s2);min-height:48px;padding:.65rem 1.4rem;border:2px solid transparent;border-radius:var(--r-m);font:700 1rem/1.4 var(--font);text-decoration:none;cursor:pointer;transition:background-color .2s,color .2s,border-color .2s,transform .2s}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--ocean-700);color:#fff}
.btn--primary:hover{background:var(--navy-900);color:#fff}
.btn--accent{background:var(--green-500);color:var(--navy-900)}
.btn--accent:hover{background:#7cd163;color:var(--navy-900)}
.btn--ghost{border-color:var(--ocean-700);color:var(--ocean-700);background:transparent}
.btn--ghost:hover{background:var(--ocean-700);color:#fff}
.btn--ghost-light{border-color:rgba(255,255,255,.55);color:#fff}
.btn--ghost-light:hover{background:#fff;color:var(--navy-900)}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.btn svg{width:20px;height:20px;flex:none}
.btn--block{width:100%}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:saturate(1.4) blur(8px)}
.site-header__inner{display:flex;align-items:center;gap:var(--s5);min-height:var(--header-h)}
.brand{display:flex;align-items:center;gap:var(--s3);min-height:44px;text-decoration:none;color:var(--navy-900)}
.brand img{width:auto;height:40px;flex:none}
.brand__text{display:flex;flex-direction:column;line-height:1.25}
.brand__fa{font-weight:700;font-size:1.125rem;color:var(--navy-900)}
.brand__en{font-size:.75rem;letter-spacing:.03em;color:var(--ocean-700);direction:ltr;text-align:start;font-weight:700;line-height:1.2}
.brand__logo{height:40px;width:auto}
.brand__text{padding-inline-start:var(--s3);border-inline-start:1px solid var(--line)}
.nav{display:none;margin-inline-start:auto}
.nav ul{display:flex;gap:var(--s2)}
.nav a{display:flex;align-items:center;min-height:44px;padding:.4rem .85rem;border-radius:var(--r-s);color:var(--slate-700);text-decoration:none;font-weight:700;font-size:.9375rem}
.nav a:hover,.nav a[aria-current="page"]{background:var(--mist-50);color:var(--ocean-700)}
.header-cta{display:none}
.menu-toggle{margin-inline-start:auto;display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border:1px solid var(--line);background:#fff;border-radius:var(--r-m);color:var(--navy-900);cursor:pointer}
.menu-toggle svg{width:24px;height:24px}
.mobile-nav{display:none;border-top:1px solid var(--line);background:#fff;padding:var(--s4) 0 var(--s5)}
.mobile-nav.is-open{display:block}
.mobile-nav a{display:block;padding:.8rem .25rem;border-bottom:1px solid var(--line);color:var(--navy-900);font-weight:700;text-decoration:none}
.mobile-nav .btn{margin-top:var(--s4);border-bottom:0;color:#fff}
@media(min-width:980px){.nav{display:block}.header-cta{display:inline-flex}.menu-toggle,.mobile-nav{display:none!important}}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;color:#d6e4ee;background:radial-gradient(900px 480px at 8% 0%,rgba(26,166,196,.28),transparent 60%),linear-gradient(165deg,#08263B 0%,#0B3C5D 55%,#0B5C86 130%)}
.hero__grid{display:grid;gap:var(--s7);align-items:center;padding-block:clamp(2.5rem,6vw,5rem)}
.hero h1{color:#fff;font-size:var(--fs-hero);line-height:1.4;margin-bottom:var(--s4)}
.hero h1 em{font-style:normal;color:var(--green-500)}
.hero .lead{max-width:38rem;color:#d6e4ee}
.hero__actions{display:flex;flex-wrap:wrap;gap:var(--s3);margin:var(--s6) 0 var(--s4)}
.hero__note{font-size:var(--fs-small);color:#b9cddb;max-width:36rem}
.hero__points{display:flex;flex-wrap:wrap;gap:var(--s3) var(--s5);margin-top:var(--s5)}
.hero__points li{display:flex;align-items:center;gap:var(--s2);font-weight:700;color:#fff;font-size:.9375rem}
.hero__points svg{width:22px;height:22px;color:var(--green-500);flex:none}
.hero__media{position:relative;justify-self:center;width:min(100%,460px)}
.frame{position:relative;border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line-dark);box-shadow:var(--shadow-2);background:#0B3C5D}
.frame img{width:100%;aspect-ratio:1/1;object-fit:cover}
.frame__badge{position:absolute;inset-inline-start:var(--s3);bottom:var(--s3);background:rgba(8,38,59,.82);color:#fff;font-size:.8125rem;padding:.3rem .8rem;border-radius:999px;backdrop-filter:blur(4px)}
@media(min-width:900px){.hero__grid{grid-template-columns:1.15fr .85fr}}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line-dark);border-top:1px solid var(--line-dark)}
.stats li{background:rgba(8,38,59,.55);padding:var(--s5) var(--s4);text-align:center}
.stats strong{display:block;color:#fff;font-size:1.25rem;line-height:1.5}
.stats span{font-size:var(--fs-small);color:#b9cddb}
@media(min-width:760px){.stats{grid-template-columns:repeat(4,1fr)}}

/* ---------- cards ---------- */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:var(--s5);box-shadow:var(--shadow-1);height:100%}
.card h3{margin-bottom:var(--s2)}
.card p:last-child{margin-bottom:0}
.icon-badge{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:var(--r-m);background:var(--mist-50);color:var(--ocean-700);margin-bottom:var(--s4)}
.icon-badge svg{width:26px;height:26px}
.card--problem{border-top:3px solid var(--aqua-500)}
.section--mist .card{box-shadow:none}
.stat-pill{display:inline-block;background:var(--navy-900);color:var(--green-500);font-weight:700;border-radius:999px;padding:.1rem .8rem;font-size:.875rem;margin-top:var(--s2)}

/* ---------- tech chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:var(--s2) var(--s2)}
.chip{display:inline-flex;align-items:center;gap:.4rem;padding:.35rem .9rem;border:1px solid var(--line);background:#fff;border-radius:999px;font-weight:700;font-size:.875rem;color:var(--navy-900);direction:ltr}
.chip::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--aqua-500)}
.section--dark .chip{background:rgba(255,255,255,.06);border-color:var(--line-dark);color:#fff}

/* ---------- how it works ---------- */
.how__diagram{display:none}
.how__list{display:grid;gap:0;counter-reset:step;position:relative;max-width:34rem;margin-inline:auto}
.how__list li{counter-increment:step;position:relative;padding-inline-start:3.4rem;padding-block:.35rem 1.4rem;color:#fff;font-weight:700}
.how__list li small{display:block;font-weight:400;color:#b9cddb;font-size:.875rem;line-height:1.7}
.how__list li::before{content:counter(step,persian);position:absolute;inset-inline-start:0;top:.1rem;width:40px;height:40px;border-radius:50%;background:var(--green-500);color:var(--navy-900);display:grid;place-items:center;font-weight:700;z-index:1}
.how__list li::after{content:"";position:absolute;inset-inline-start:19px;top:2.6rem;bottom:-.2rem;width:2px;background:repeating-linear-gradient(to bottom,var(--aqua-500) 0 6px,transparent 6px 12px);background-size:2px 12px;animation:flowv 1s linear infinite}
.how__list li:last-child::after{display:none}
@keyframes flowv{to{background-position:0 12px}}
@media(min-width:900px){
  .how__diagram{display:block}
  .how__list{display:none}
}
.diagram{width:100%;height:auto;max-width:960px;margin-inline:auto}
.diagram .node rect{fill:rgba(255,255,255,.06);stroke:rgba(255,255,255,.4);stroke-width:1.5}
.diagram .node--aot rect{fill:#5DB946;stroke:#5DB946}
.diagram .node text{fill:#fff;font:700 15px var(--font);text-anchor:middle}
.diagram .node--aot text{fill:#0B2A43}
.diagram .num{fill:#5DB946}
.diagram .num-t{fill:#0B2A43;font:700 13px var(--font);text-anchor:middle}
.diagram .node--aot .num{fill:#0B2A43}
.diagram .node--aot .num-t{fill:#5DB946}
.diagram .flow{fill:none;stroke:#1AA6C4;stroke-width:3;stroke-linecap:round;stroke-dasharray:7 9;animation:flow 1.1s linear infinite}
.diagram .flow--return{stroke:#5DB946}
@keyframes flow{to{stroke-dashoffset:-16}}
.diagram .arrow{fill:#1AA6C4}
.diagram .arrow--g{fill:#5DB946}
.diagram .label{fill:#9fe0ee;font:400 13px var(--font);text-anchor:middle}
.how__caption{margin-top:var(--s5);font-size:var(--fs-small);color:#9fb8c9;text-align:center}

/* ---------- farm types ---------- */
.system{display:grid;gap:var(--s5)}
@media(min-width:900px){.system{grid-template-columns:1.2fr 1fr;align-items:stretch}}
.system__card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;box-shadow:var(--shadow-1)}
.system__card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.system__body{padding:var(--s5) var(--s5) var(--s6);display:flex;flex-direction:column;flex:1}
.system__tag{align-self:flex-start;font-size:.8125rem;font-weight:700;border-radius:999px;padding:.15rem .8rem;margin-bottom:var(--s3);background:var(--mist-50);color:var(--ocean-700)}
.system__card--primary{border-color:var(--ocean-700);border-width:2px}
.system__card--primary .system__tag{background:var(--ocean-700);color:#fff}
.checks li{position:relative;padding-inline-start:1.9rem;margin-bottom:.45rem}
.checks li::before{content:"";position:absolute;inset-inline-start:.1rem;top:.5rem;width:1rem;height:.55rem;border-left:3px solid var(--green-500);border-bottom:3px solid var(--green-500);transform:rotate(-45deg)}
.system__body .btn{margin-top:auto;align-self:flex-start}
.system__body ul{margin-bottom:var(--s5)}

/* ---------- classes table ---------- */
.class-card{position:relative;display:flex;flex-direction:column}
.class-card__letter{display:grid;place-items:center;width:52px;height:52px;border-radius:var(--r-m);background:var(--navy-900);color:var(--green-500);font:700 1.5rem/1 var(--font);direction:ltr;margin-bottom:var(--s4)}
.class-card--a{border:2px solid var(--ocean-700)}
.class-card--a .class-card__letter{background:var(--green-500);color:var(--navy-900)}
.class-card__count{color:var(--ocean-700);font-weight:700;margin-bottom:var(--s3)}
.class-card .chips{margin-top:auto;padding-top:var(--s4)}

/* ---------- trust ---------- */
.trust-list{display:grid;gap:var(--s4)}
@media(min-width:760px){.trust-list{grid-template-columns:repeat(2,1fr)}}
.trust-item{display:flex;gap:var(--s4);align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:var(--s4) var(--s5)}
.trust-item svg{width:32px;height:32px;color:var(--ocean-700);flex:none;margin-top:.15rem}
.trust-item strong{display:block;color:var(--navy-900)}
.gallery{display:grid;gap:var(--s3);grid-template-columns:repeat(2,1fr);margin-top:var(--s7)}
@media(min-width:760px){.gallery{grid-template-columns:repeat(3,1fr);gap:var(--s4)}}
.gallery figure{margin:0;position:relative;border-radius:var(--r-m);overflow:hidden;background:var(--mist-50)}
.gallery img{width:100%;aspect-ratio:4/3;object-fit:cover}
.gallery figcaption{position:absolute;inset-inline-start:var(--s2);bottom:var(--s2);background:rgba(8,38,59,.82);color:#fff;font-size:.75rem;padding:.15rem .7rem;border-radius:999px}
.gallery-note{font-size:var(--fs-small);margin-top:var(--s4)}

/* ---------- FAQ ---------- */
.faq{max-width:52rem;margin-inline:auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);margin-bottom:var(--s3);overflow:hidden}
.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:var(--s4);padding:var(--s4) var(--s5);font-weight:700;color:var(--navy-900);min-height:56px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";flex:none;width:32px;height:32px;border-radius:50%;background:var(--mist-50);color:var(--ocean-700);display:grid;place-items:center;font-size:1.4rem;line-height:1;transition:transform .2s}
.faq details[open] summary::after{content:"−"}
.faq details[open]{border-color:var(--ocean-700)}
.faq .faq__a{padding:0 var(--s5) var(--s5)}

/* ---------- contact / form ---------- */
.cta-wrap{display:grid;gap:var(--s7)}
@media(min-width:900px){.cta-wrap{grid-template-columns:1fr 1.1fr;align-items:start}}
.contact-list li{display:flex;gap:var(--s3);align-items:flex-start;margin-bottom:var(--s4)}
.contact-list svg{width:24px;height:24px;color:var(--green-500);flex:none;margin-top:.3rem}
.contact-list a{color:#fff;font-weight:700;text-decoration:none;display:inline-flex;align-items:center;min-height:44px}
.contact-list a:hover{text-decoration:underline}
.contact-list small{display:block;color:#9fb8c9}
.form-card{background:#fff;color:var(--slate-700);border-radius:var(--r-l);padding:clamp(1.25rem,3vw,2rem);box-shadow:var(--shadow-2)}
.form-card h3{margin-bottom:var(--s2);color:var(--navy-900)}
.steps{display:flex;gap:var(--s2);margin:var(--s4) 0 var(--s5)}
.steps li{flex:1;height:6px;border-radius:3px;background:var(--line)}
.steps li.is-done{background:var(--green-500)}
.field{margin-bottom:var(--s4)}
.field label,.field legend{display:block;font-weight:700;color:var(--navy-900);margin-bottom:var(--s2);font-size:.9375rem;padding:0}
.field .opt{font-weight:400;color:var(--slate-700);font-size:var(--fs-small)}
.input,.select,.textarea{width:100%;min-height:50px;padding:.6rem .9rem;border:1.5px solid #9bb0bf;border-radius:var(--r-s);font:400 1rem/1.6 var(--font);color:var(--navy-900);background:#fff}
.textarea{min-height:110px;resize:vertical}
.input:focus,.select:focus,.textarea:focus{outline:3px solid rgba(26,166,196,.45);border-color:var(--ocean-700)}
.input.is-invalid{border-color:var(--red-700)}
.field-error{display:none;color:var(--red-700);font-size:var(--fs-small);margin-top:var(--s1)}
.is-invalid + .field-error{display:block}
.choice-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--s2)}
.choice{position:relative}
.choice input{position:absolute;opacity:0;inset:0;cursor:pointer}
.choice span{display:flex;align-items:center;justify-content:center;text-align:center;min-height:48px;padding:.4rem .6rem;border:1.5px solid #9bb0bf;border-radius:var(--r-s);font-weight:700;font-size:.9375rem;color:var(--navy-900)}
.choice input:checked + span{background:var(--ocean-700);border-color:var(--ocean-700);color:#fff}
.choice input:focus-visible + span{outline:3px solid var(--aqua-500);outline-offset:2px}
.form-step[hidden]{display:none}
.form-actions{display:flex;gap:var(--s3);flex-wrap:wrap}
.hp{position:absolute;inset-inline-start:-9999px;width:1px;height:1px;overflow:hidden}
.consent{display:flex;gap:var(--s3);align-items:flex-start;font-size:var(--fs-small)}
.consent input{width:22px;height:22px;margin-top:.3rem;flex:none;accent-color:var(--ocean-700)}
.form-success{text-align:center;padding:var(--s5) var(--s3)}
.form-success svg{width:56px;height:56px;color:var(--ok-700);margin:0 auto var(--s4)}
.form-hint{margin:0 0 var(--s4);color:var(--slate-700);font-size:var(--fs-small)}
.form-uid{margin:var(--s4) 0 0;padding:var(--s3) var(--s4);border-radius:var(--r-s,8px);background:var(--mist,#eef6f3);font-size:var(--fs-small)}
.form-uid strong{font-size:1.05em;letter-spacing:.04em}
.prose a[href^="tel:"],.prose a[href^="mailto:"]{display:inline-block;padding:.65rem .35rem}
.demo-note{font-size:.8125rem;background:#FFF4E0;color:var(--amber-700);border-radius:var(--r-s);padding:.4rem .8rem;margin-top:var(--s4)}

/* ---------- footer ---------- */
.site-footer{background:#071e31;color:#b9cddb;padding-block:var(--s8) var(--s5);font-size:.9375rem}
.site-footer h3{color:#fff;font-size:1rem;margin-bottom:var(--s3)}
.site-footer a{color:#d6e4ee;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.site-footer li a{display:inline-flex;align-items:center;min-height:44px}
.site-footer li{margin-bottom:0!important}
.site-footer a.ltr{display:inline-flex;align-items:center;min-height:44px}
.footer-grid{display:grid;gap:var(--s6)}
@media(min-width:760px){.footer-grid{grid-template-columns:1.4fr 1fr 1.6fr}}
.footer-grid li{margin-bottom:var(--s2)}
.site-footer .brand{margin-bottom:var(--s3)}
.site-footer .brand__fa{color:#fff}.site-footer .brand__en{color:#9fe0ee}
.legal{margin-top:var(--s7);padding-top:var(--s4);border-top:1px solid var(--line-dark);font-size:var(--fs-small);display:flex;flex-wrap:wrap;gap:var(--s2) var(--s5);justify-content:space-between}

/* ---------- mobile sticky bar ---------- */
.m-bar{position:fixed;inset-inline:0;bottom:0;z-index:60;display:flex;gap:var(--s2);padding:.6rem .75rem calc(.6rem + env(safe-area-inset-bottom));background:rgba(255,255,255,.97);border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(11,42,67,.1)}
.m-bar .btn{flex:1;min-height:48px;padding:.5rem .75rem;font-size:.9375rem}
@media(min-width:980px){.m-bar{display:none}}
body{padding-bottom:76px}
@media(min-width:980px){body{padding-bottom:0}}

/* ---------- reveal (progressive) ---------- */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.js .reveal.is-in{opacity:1;transform:none}

/* ---------- design-system page helpers ---------- */
.ds-swatch{border-radius:var(--r-m);overflow:hidden;border:1px solid var(--line);background:#fff}
.ds-swatch__c{height:84px}
.ds-swatch__t{padding:var(--s3) var(--s4);font-size:var(--fs-small);line-height:1.7}
.ds-swatch__t code{direction:ltr;unicode-bidi:isolate;display:inline-block}
.ds-row{display:flex;flex-wrap:wrap;gap:var(--s3);align-items:center}
code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.85em;background:var(--mist-50);padding:.05rem .4rem;border-radius:4px;direction:ltr;unicode-bidi:isolate}
.ds-table{width:100%;border-collapse:collapse;font-size:.9375rem}
.ds-table th,.ds-table td{padding:.6rem .8rem;border-bottom:1px solid var(--line);text-align:start;vertical-align:top}
.ds-table th{background:var(--mist-50);color:var(--navy-900)}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .js .reveal{opacity:1;transform:none}
  .diagram .flow{stroke-dasharray:none}
}

/* ---------- touch targets ---------- */
.legal a{display:inline-flex;align-items:center;min-height:44px}
.consent{min-height:44px;align-items:center}
.btn-row{display:flex;flex-wrap:wrap;gap:var(--s3);margin-top:var(--s5)}
.system__body .btn-row{margin-top:auto}
.system__body .btn-row .btn{margin-top:0}

/* ---------- inner pages (E3) ---------- */
.page-hero{background:radial-gradient(800px 360px at 10% 0%,rgba(26,166,196,.25),transparent 60%),linear-gradient(165deg,#08263B 0%,#0B3C5D 60%,#0B5C86 140%);color:#d6e4ee;padding-block:var(--s5) clamp(2rem,5vw,3.5rem)}
.page-hero h1{color:#fff;font-size:clamp(1.75rem,1.3rem + 1.8vw,2.625rem);line-height:1.45;margin-bottom:var(--s3)}
.page-hero .lead{max-width:46rem;color:#d6e4ee;margin-bottom:0}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;font-size:.875rem;margin-bottom:var(--s2)}
.breadcrumb li{display:flex;align-items:center}
.breadcrumb li+li::before{content:"‹";margin-inline:.5rem;color:#9fb8c9}
.breadcrumb a{color:#9fe0ee;display:inline-flex;align-items:center;min-height:44px;text-decoration:none}
.breadcrumb a:hover{text-decoration:underline;color:#fff}
.breadcrumb [aria-current]{color:#fff}
.split{display:grid;gap:var(--s7);align-items:center}
@media(min-width:900px){.split{grid-template-columns:1fr 1fr}.split--text-wide{grid-template-columns:1.15fr .85fr}}
.photo{margin:0;border-radius:var(--r-l);overflow:hidden;box-shadow:var(--shadow-1);border:1px solid var(--line);background:var(--mist-50)}
.photo img{width:100%;aspect-ratio:4/3;object-fit:cover}
.photo--tall{max-width:420px;justify-self:center}
.photo--tall img{aspect-ratio:3/4}
.photo figcaption{padding:.5rem 1rem;font-size:.8125rem;color:var(--slate-700);background:#fff}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--r-m);background:#fff}
.compare{width:100%;border-collapse:collapse;min-width:520px}
.compare th,.compare td{padding:.85rem 1rem;text-align:start;vertical-align:top;border-bottom:1px solid var(--line)}
.compare thead th{background:var(--navy-900);color:#fff;font-weight:700}
.compare tbody th{background:var(--mist-50);color:var(--navy-900);width:24%}
.compare tr:last-child>*{border-bottom:0}
.matrix{min-width:560px}
.matrix th,.matrix td{text-align:center}
.matrix tbody th{text-align:start;width:auto}
.matrix .ltr{font-weight:700;color:var(--navy-900)}
.yes{color:var(--ok-700);font-weight:700}
.no{color:#566b7d}
.max{display:inline-block;background:var(--navy-900);color:var(--green-500);border-radius:999px;padding:.05rem .75rem;font-size:.8125rem;font-weight:700}
.table-note{font-size:var(--fs-small);margin-top:var(--s3)}
.steps-3{display:grid;gap:var(--s5);counter-reset:s}
@media(min-width:760px){.steps-3{grid-template-columns:repeat(3,1fr)}}
.steps-3 li{counter-increment:s;position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:var(--s5);padding-top:var(--s7)}
.steps-3 li::before{content:counter(s,persian);position:absolute;top:var(--s4);inset-inline-start:var(--s5);width:40px;height:40px;border-radius:50%;background:var(--green-500);color:var(--navy-900);display:grid;place-items:center;font-weight:700}
.steps-3 strong{display:block;color:var(--navy-900);margin-bottom:var(--s2)}
.timeline{position:relative;max-width:46rem;margin-inline:auto;padding-inline-start:0}
.timeline li{position:relative;padding-inline-start:2.6rem;padding-bottom:var(--s5)}
.timeline li::before{content:"";position:absolute;inset-inline-start:0;top:.55rem;width:16px;height:16px;border-radius:50%;background:var(--green-500);box-shadow:0 0 0 4px #fff,0 0 0 5px var(--aqua-500)}
.timeline li::after{content:"";position:absolute;inset-inline-start:7px;top:1.6rem;bottom:-.4rem;width:2px;background:var(--line)}
.timeline li:last-child::after{display:none}
.timeline strong{display:block;color:var(--navy-900)}
.cta-band{background:linear-gradient(165deg,#08263B,#0B3C5D 70%,#0B5C86 150%);border-radius:var(--r-l);padding:clamp(1.5rem,4vw,3rem);display:grid;gap:var(--s5);align-items:center;color:#d6e4ee}
@media(min-width:900px){.cta-band{grid-template-columns:1.4fr 1fr}}
.cta-band h2{color:#fff;margin-bottom:var(--s2)}
.cta-band p{margin:0}
.cta-band .btn-row{margin-top:0}
.gallery--wide{grid-template-columns:repeat(2,1fr);margin-top:var(--s5)}
@media(min-width:760px){.gallery--wide{grid-template-columns:repeat(3,1fr)}}
.faq-group{margin-bottom:var(--s7)}
.faq-group h2{font-size:var(--fs-h3);margin-bottom:var(--s4)}
.toc{display:flex;flex-wrap:wrap;gap:var(--s2);margin-bottom:var(--s6)}
.toc a{display:inline-flex;align-items:center;min-height:44px;padding:.3rem 1rem;border:1px solid var(--line);border-radius:999px;background:#fff;text-decoration:none;font-weight:700;color:var(--ocean-700);font-size:.9375rem}
.toc a:hover{background:var(--ocean-700);color:#fff}
.refs{font-size:var(--fs-small)}
.refs li{margin-bottom:.4rem}
.refs a{display:inline-flex;align-items:center;min-height:44px}
.contact-grid{display:grid;gap:var(--s7)}
@media(min-width:900px){.contact-grid{grid-template-columns:1fr 1.1fr;align-items:start}}
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);padding:var(--s6)}
.info-card .contact-list a{color:var(--ocean-700)}
.info-card .contact-list small{color:var(--slate-700)}
.info-card .contact-list svg{color:var(--ocean-700)}

.faq__links{display:flex;flex-wrap:wrap;gap:0 var(--s5);margin:0}
.faq__links a{display:inline-flex;align-items:center;min-height:44px;font-weight:700}
.faq-group .faq{max-width:none}

.page-hero .eyebrow{color:#9fe0ee}
.section--tight{padding-block:clamp(1.5rem,4vw,3rem)}
.section--tight .section__head{margin-bottom:var(--s4)}
.cls-badges{display:inline-flex;gap:.35rem;direction:ltr}
.cls{width:30px;height:30px;border-radius:50%;background:var(--navy-900);color:var(--green-500);display:grid;place-items:center;font-weight:700;font-size:.8125rem}
.info-card h3{margin-bottom:var(--s3)}
.info-card .chips{margin-bottom:var(--s4)}
.table-scroll{position:relative}

.breadcrumb a{min-width:44px;justify-content:center}
.as-h3{font-size:var(--fs-h3)}
.steps-3 li{padding-top:4.5rem}
.as-h2{font-size:var(--fs-h2);font-weight:700;color:#fff;line-height:1.45;margin-bottom:var(--s3)}

/* ---------- conceptual schematics ---------- */
.schema{margin:0;border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);background:var(--mist-50);box-shadow:var(--shadow-1)}
.schema svg{width:100%;height:auto;display:block}
.schema figcaption{padding:.5rem 1rem;font-size:.8125rem;color:var(--slate-700);background:#fff}
.sch-bg{fill:var(--mist-50)}
.sch-water{fill:#CFEAF3;stroke:var(--ocean-700);stroke-width:3}
.sch-wave{fill:none;stroke:var(--aqua-500);stroke-width:3;stroke-linecap:round;opacity:.9}
.sch-pipe{fill:none;stroke:var(--ocean-700);stroke-width:7;stroke-linecap:round;stroke-linejoin:round}
.sch-pipe.sch-thin{stroke-width:4;stroke:var(--slate-700)}
.sch-ah{fill:var(--ocean-700)}
.sch-unit{fill:var(--navy-900)}
.sch-unit-t{fill:#fff;font-weight:700;font-size:34px;font-family:var(--font)}
.sch-unit-s{fill:#9fe0ee;font-size:17px;font-family:var(--font)}
.sch-label{fill:var(--navy-900);font-weight:700;font-size:20px;font-family:var(--font)}
.sch-note{fill:var(--slate-700);font-size:16px;font-family:var(--font)}
.sch-fish{fill:var(--ocean-700)}
.sch-eye{fill:#fff}

/* ---------- technology cards ---------- */
.tech-grid{display:grid;gap:var(--s5)}
@media(min-width:860px){.tech-grid{grid-template-columns:repeat(2,1fr)}}
.tech-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:var(--s5);display:flex;flex-direction:column;gap:var(--s4)}
.tech-card header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--s3)}
.tech-card h3{margin:0;font-size:var(--fs-h3)}
.tech-card h3 .ltr{display:block;color:var(--navy-900)}
.tech-card h3 small{display:block;font-size:.875rem;font-weight:400;color:var(--slate-700)}
.tech-block p{margin:.4rem 0 0}
.tech-co{background:var(--mist-50);border-radius:var(--r-s);padding:var(--s3) var(--s4)}
.tag{display:inline-block;font-size:.8125rem;font-weight:700;border-radius:999px;padding:.05rem .7rem}
.tag--sci{background:#E4EEF5;color:var(--ocean-700)}
.tag--co{background:var(--navy-900);color:var(--green-500)}

/* ---------- knowledge center / articles ---------- */
.card--link h3 a{text-decoration:none;color:var(--navy-900);display:inline-block;min-height:44px;line-height:1.7}
.card--link h3 a:hover{color:var(--ocean-700);text-decoration:underline}
.card__meta{margin:0;font-size:.8125rem;color:var(--slate-700)}
.vis-list{display:flex;flex-wrap:wrap;gap:var(--s3)}
.motion-grid{display:grid;gap:var(--s6);grid-template-columns:repeat(auto-fit,minmax(min(100%,480px),1fr));align-items:start}
.motion-cell .motion{margin-bottom:var(--s3)}
.motion-link{margin:0 0 var(--s5)}
.section--article{padding-block:clamp(2rem,5vw,4rem)}
.article-wrap{display:grid;gap:var(--s6)}
@media(min-width:1000px){.article-wrap{grid-template-columns:260px minmax(0,1fr);gap:var(--s7);align-items:start}}
.toc-box{background:var(--mist-50);border:1px solid var(--line);border-radius:var(--r-m);padding:var(--s4) var(--s5)}
@media(min-width:1000px){.toc-box{position:sticky;top:calc(var(--header-h) + 16px)}}
.toc-box ul{display:grid;gap:0}
.toc-box a{display:flex;align-items:center;min-height:44px;text-decoration:none;font-weight:700;font-size:.9375rem;color:var(--ocean-700)}
.toc-box a:hover{text-decoration:underline}
.article{max-width:46rem;min-width:0}
.article h2{font-size:var(--fs-h2);margin-top:0;scroll-margin-top:calc(var(--header-h) + 12px)}
.article p,.article li{font-size:1.0625rem}
.art-sec{margin-bottom:var(--s7)}
.article-meta{display:flex;flex-wrap:wrap;gap:.25rem 1.2rem;font-size:.875rem;color:var(--slate-700);margin-bottom:var(--s3)}
.draft-note{font-size:.8125rem;background:#FFF4E0;color:var(--amber-700);border-radius:var(--r-s);padding:.4rem .8rem;margin-bottom:var(--s5)}
.keypoints{background:#fff;border:1px solid var(--line);border-inline-start:4px solid var(--green-500);border-radius:var(--r-m);padding:var(--s4) var(--s5);margin-bottom:var(--s7)}
.keypoints h2{font-size:var(--fs-h3);margin-bottom:var(--s3)}
.co-box{background:var(--mist-50);border-inline-start:4px solid var(--navy-900);border-radius:var(--r-m);padding:var(--s4) var(--s5)}
.co-box p:last-child{margin-bottom:0}
.note-sm{font-size:.875rem!important;color:var(--amber-700)}
.article .motion{max-width:100%}
.article .btn-row{margin-top:var(--s4)}

/* ---------- identity (official TTF logo, brand name, legal name) ---------- */
.logo-plate{display:inline-flex;align-items:center;justify-content:center;background:#fff;border-radius:10px;padding:6px 10px;line-height:0;flex:none}
.logo-plate img{height:40px;width:auto}
.logo-plate--lg{padding:14px 20px;border:1px solid var(--line);border-radius:var(--r-m)}
.logo-plate--lg img{height:80px}
.site-footer .brand__text{border-inline-start-color:rgba(255,255,255,.28)}
.identity{display:grid;gap:var(--s5);align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--r-l);padding:var(--s6)}
@media(min-width:760px){.identity{grid-template-columns:auto 1fr;gap:var(--s7)}}
.identity__logo{margin:0;display:flex;justify-content:center}
.identity__list{margin:0;display:grid;gap:var(--s4)}
.identity__list>div{display:grid;gap:2px;padding-bottom:var(--s4);border-bottom:1px solid var(--line)}
.identity__list>div:last-child{border-bottom:0;padding-bottom:0}
.identity__list dt{font-size:var(--fs-small);font-weight:700;color:var(--ocean-700)}
.identity__list dd{margin:0;font-size:1.125rem;font-weight:700;color:var(--navy-900)}
/* ---------- eco-friendly concept (custom, brand-consistent; not a certification mark) ---------- */
:root{--eco-50:#EEF7EA;--eco-200:#CDE8C3;--eco-700:#2E7D1E}
.section--eco{background:var(--eco-50);padding-block:var(--s7)}
.eco{display:flex;gap:var(--s5);align-items:flex-start;max-width:56rem}
.eco__icon{display:inline-flex;align-items:center;justify-content:center;flex:none;width:64px;height:64px;border-radius:50%;background:#fff;border:2px solid var(--eco-200);color:var(--eco-700)}
.eco__icon svg{width:32px;height:32px}
.eco__body h2{margin-bottom:var(--s3)}
.eco__body p:last-child{margin-bottom:0}
.section--eco .eyebrow{color:var(--eco-700)}
@media(max-width:559px){.eco{flex-direction:column;gap:var(--s4)}}
.eco-chip{display:inline-flex;align-items:center;gap:var(--s2);margin:0 0 var(--s3);padding:4px 12px 4px 14px;border-radius:999px;background:var(--eco-50);border:1px solid var(--eco-200);color:var(--navy-900);font-size:var(--fs-small);font-weight:700}
.eco-chip svg{width:20px;height:20px;color:var(--eco-700)}
.eco-chip--dark{background:rgba(93,185,70,.14);border-color:rgba(93,185,70,.45);color:#fff}
.eco-chip--dark svg{color:#8ED87A}
.form-error{margin:var(--s3) 0 0;color:var(--red-700);font-weight:700}
.form-error[hidden]{display:none}

/* ---------- native block content (pages and articles created in the WordPress editor) ----------
   Seeded pages use component classes; anything an editor adds with core blocks gets the same look. */
.prose,.wp-block-group.container>.prose{max-width:46rem}
.prose .wp-block-post-content>:first-child,.article .wp-block-post-content>:first-child{margin-top:0}
.prose h2,.article .wp-block-post-content>h2{font-size:var(--fs-h2);margin:var(--s7) 0 var(--s4);scroll-margin-top:calc(var(--header-h) + 12px)}
.prose h3,.article .wp-block-post-content>h3{font-size:var(--fs-h3);margin:var(--s6) 0 var(--s3)}
.prose h4,.article .wp-block-post-content>h4{font-size:1.0625rem;margin:var(--s5) 0 var(--s2)}
.prose p,.prose li{font-size:1.0625rem}
ul.wp-block-list:not(.checks):not(.refs){list-style:disc;padding-inline-start:1.6rem;margin:0 0 var(--s4)}
ol.wp-block-list{list-style:decimal;padding-inline-start:1.8rem;margin:0 0 var(--s4)}
ul.wp-block-list:not(.checks):not(.refs) li,ol.wp-block-list li{margin-bottom:.4rem;padding-inline-start:.2rem}
ul.wp-block-list:not(.checks):not(.refs) li::marker{color:var(--green-500)}
ol.wp-block-list li::marker{color:var(--ocean-700);font-weight:700}
.wp-block-quote{margin:var(--s5) 0;padding:var(--s3) var(--s5);border-inline-start:4px solid var(--green-500);background:var(--mist-50);border-start-end-radius:var(--r-m);border-end-end-radius:var(--r-m)}
.wp-block-quote p:last-child{margin-bottom:0}
.wp-block-quote cite{display:block;font-size:var(--fs-small);font-style:normal;color:var(--ocean-700);font-weight:700}
figure.wp-block-table{margin:var(--s5) 0;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--r-m);background:#fff}
.wp-block-table table{width:100%;border-collapse:collapse;min-width:480px}
.wp-block-table th,.wp-block-table td{padding:.7rem .9rem;border-bottom:1px solid var(--line);text-align:start;vertical-align:top}
.wp-block-table thead th{background:var(--navy-900);color:#fff;font-weight:700;border-bottom:0}
.wp-block-table tbody tr:last-child td{border-bottom:0}
.wp-block-table figcaption{padding:.5rem .9rem}
.wp-block-buttons{display:flex;flex-wrap:wrap;gap:var(--s3);margin:var(--s5) 0}
.wp-block-button__link{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:.65rem 1.4rem;border:2px solid var(--ocean-700);border-radius:var(--r-m);background:var(--ocean-700);color:#fff;font:700 1rem/1.4 var(--font);text-decoration:none;cursor:pointer;transition:background-color .2s,color .2s}
.wp-block-button__link:hover{background:var(--navy-900);border-color:var(--navy-900);color:#fff}
.is-style-outline>.wp-block-button__link{background:transparent;color:var(--ocean-700)}
.is-style-outline>.wp-block-button__link:hover{background:var(--ocean-700);color:#fff}
hr.wp-block-separator{border:0;border-top:1px solid var(--line);margin:var(--s6) 0;opacity:1}
.wp-block-image{margin:var(--s5) 0}
.wp-block-image img{border-radius:var(--r-m);height:auto}
.wp-block-image figcaption,.wp-block-quote+figcaption{font-size:var(--fs-small);color:var(--slate-700);margin-top:var(--s2)}
.wp-block-details{margin:var(--s4) 0;border:1px solid var(--line);border-radius:var(--r-m);padding:var(--s3) var(--s4)}
.wp-block-details summary{cursor:pointer;font-weight:700;color:var(--navy-900);min-height:44px;display:flex;align-items:center}
.wp-block-columns{display:flex;flex-wrap:wrap;gap:var(--s5);margin:var(--s5) 0}
.wp-block-column{flex:1 1 16rem;min-width:0}

/* ---------- typography system (E5) ----------
   Base family Vazirmatn 400/700 (self-hosted woff2). Form controls inherit it (browser default was Arial).
   Justified text only for long-form paragraphs and only where the measured column is wide enough
   (>= 33rem ~ 60+ characters per line): below that, Persian word gaps stretch to 2-3x, so the text keeps its natural right alignment. */
button,input,select,textarea{font-family:inherit}
h1,h2,h3{text-wrap:balance}
p,li{text-wrap:pretty}
.article,.faq__a,.tech-block,.eco__body,.system__body,.prose{container-type:inline-size}
@container (min-width:33rem){
  .art-sec p:not(.note-sm):not(.table-note),.co-box p,.faq__a p,.tech-block p,.eco__body p,.system__body p,.prose p,.article .wp-block-post-content>p{text-align:justify;text-justify:inter-word;hyphens:manual}
}

/* ---------- WordPress integration ---------- */
.wp-site-blocks>.wp-block-template-part{display:contents}
.wp-site-blocks{padding:0}
.privacy-note{font-size:.8125rem;color:var(--slate-700);margin-top:var(--s4)}
.wp-block-group.container,.wp-block-group.container>*{max-width:none}
.wp-block-list.checks,.wp-block-list.refs{padding-inline-start:0}
/* 2026-11-03 fix (theme 0.4.3): .eco__body has container-type:inline-size, so its intrinsic width is 0; as a flex item it needs an explicit size (text collapsed to one word per line). */
.eco__body{flex:1 1 0;min-width:0}
@media(max-width:559px){.eco__body{flex:none;width:100%}}