/* آبگون پلیمر — «سطحِ آب»: سرمه‌ایِ عمیق، آبیِ آب، نارنجیِ درِ مخزن؛ Noto Kufi برای تیتر (رقم‌ها از وزیرمتن)، وزیرمتن برای متن */
/* Persian digits ۰–۹ from Vazirmatn: Noto Kufi draws ۴ the Arabic way */
@font-face{font-family:Kufi;font-weight:600 900;font-display:swap;src:url(/a/fonts/vazirmatn-arabic-600-normal.woff2) format('woff2');unicode-range:U+066B-066C,U+06F0-06F9}
@font-face{font-family:Kufi;font-weight:600 900;font-display:swap;src:url(/a/fonts/noto-kufi-arabic-arabic-800-normal.woff2) format('woff2');unicode-range:U+0600-066A,U+066D-06EF,U+06FA-06FF,U+200C-200E,U+FB50-FDFF,U+FE80-FEFC}
@font-face{font-family:Vazir;font-weight:400;font-display:swap;src:url(/a/fonts/vazirmatn-arabic-400-normal.woff2) format('woff2');unicode-range:U+0600-06FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE80-FEFC}
@font-face{font-family:Vazir;font-weight:400 800;font-display:swap;src:url(/a/fonts/vazirmatn-latin-400-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+2000-206F}
@font-face{font-family:Vazir;font-weight:600 800;font-display:swap;src:url(/a/fonts/vazirmatn-arabic-600-normal.woff2) format('woff2');unicode-range:U+0600-06FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE80-FEFC}

:root{--bg:#f2f6fc;--surface:#fff;--ink:#0f1f3d;--muted:#55627a;--line:#dbe4f2;--brand:#12357a;--brand-ink:#fff;--accent:#ff8a3d;
--navy:#12357a;--navy-d:#0a2154;--water:#4f8df5;--water-l:#e3eeff;--cap:#ff8a3d;--radius:18px;--radius-sm:12px;
--shadow:0 1px 2px rgb(18 53 122/.06),0 16px 40px rgb(18 53 122/.12);--font-body:Vazir,Tahoma,sans-serif;--font-display:Kufi,Vazir,sans-serif;
--ft-bg:#0a2154;--ft-ink:#dfe8fb}
body{line-height:1.95}
h1,h2,h3,.sec__title{font-weight:800;letter-spacing:-.2px}
.hd{background:color-mix(in srgb,#fff 92%,transparent)}
.brand svg{width:44px;height:44px}
.brand__text b{font-family:var(--font-display);font-size:19px;color:var(--navy)}
.hd__call{background:var(--navy);color:#fff}
.nav a:hover,.nav a[aria-current=page]{background:var(--water-l);color:var(--navy)}
.btn--brand{background:var(--navy);color:#fff}
.btn--cap{background:var(--cap);color:#1b1206}
.btn--cap:hover{background:#ff7a22}
.card__img--art{background:#eef3fb}
.card__price{color:#1f5fd0}
.pd__price{background:linear-gradient(120deg,#f2f7ff,#e3eeff);border:1px solid #cddcf5}
.pd__price b{color:var(--navy)}
.pd__coll{color:#1f5fd0}
.ft{background:radial-gradient(640px 260px at 80% 0%,rgb(79 141 245/.22),transparent 70%),var(--ft-bg)}
.ft .brand__text b{color:#fff}

/* ---------- hero ---------- */
.a-hero{position:relative;overflow:hidden;color:#e6efff;background:radial-gradient(720px 420px at 75% 30%,rgb(79 141 245/.35),transparent 65%),linear-gradient(165deg,#173f8f,#12357a 50%,#0a2154)}
.a-hero__in{position:relative;z-index:1;display:grid;gap:30px;align-items:center;padding-block:clamp(34px,6vw,80px) clamp(40px,6vw,84px)}
@media (min-width:940px){.a-hero__in{grid-template-columns:1.15fr .85fr;gap:40px}}
.a-eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:rgb(255 255 255/.10);color:#cfe0ff;font-size:13.5px;font-weight:600}
.a-hero h1{font-family:var(--font-display);font-size:clamp(30px,5.2vw,54px);line-height:1.55;margin:16px 0 10px;color:#fff}
.a-hero h1 em{font-style:normal;color:#9cc4ff}
.a-hero p{color:#c6d6f3;max-width:560px}
.a-cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.a-hero .btn--ghost{color:#fff}
.a-stat{display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:26px}
.a-stat span{display:flex;flex-direction:column;color:#b9cdf0;font-size:13px}
.a-stat b{font-family:var(--font-display);font-size:24px;color:#fff;line-height:1.5}

/* the tank that fills */
.a-tank{position:relative;width:min(260px,58vw);aspect-ratio:1/1.35;margin-inline:auto}
.a-tank__cap{position:absolute;top:0;left:50%;width:30%;height:9%;transform:translateX(-50%);border-radius:10px;background:var(--cap);box-shadow:0 6px 0 rgb(0 0 0/.12) inset}
.a-tank__body{position:absolute;inset:7% 0 4%;border-radius:22% / 14%;overflow:hidden;background:linear-gradient(90deg,#0d2a66,#1e4fae 45%,#2a5bc4 55%,#0d2a66);box-shadow:0 30px 60px rgb(0 0 0/.35),inset 0 0 0 3px rgb(255 255 255/.08)}
.a-tank__body::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(180deg,transparent 0 23%,rgb(255 255 255/.10) 23% 24%);z-index:2;pointer-events:none}
.a-tank__water{position:absolute;inset:auto 0 0;height:var(--lvl,62%);background:linear-gradient(180deg,rgb(120 178 255/.75),rgb(79 141 245/.55));transition:height 1.2s cubic-bezier(.3,.1,.2,1);animation:fill 2.2s .3s cubic-bezier(.3,.1,.2,1) both}
.a-tank__water svg{position:absolute;left:0;bottom:calc(100% - 10px);width:200%;height:22px;animation:wave 5s linear infinite}
.a-tank__gauge{position:absolute;inset:14% auto 10% -14%;width:8%;display:flex;flex-direction:column;justify-content:space-between;color:#9cc4ff;font-size:11px;font-weight:600}
.a-tank__floor{position:absolute;inset:auto -10% -4%;height:6%;border-radius:50%;background:radial-gradient(closest-side,rgb(0 0 0/.35),transparent)}
.a-tank__vol{position:absolute;inset:auto 0 12%;text-align:center;z-index:3;font-family:var(--font-display);font-size:clamp(18px,3vw,24px);color:#fff;text-shadow:0 2px 8px rgb(0 0 0/.4)}
@keyframes fill{from{height:4%}}
@keyframes wave{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.a-tank__water,.a-tank__water svg{animation:none;transition:none}}

/* ---------- volume picker ---------- */
.a-hd{display:flex;align-items:end;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.a-hd h2{font-family:var(--font-display);font-size:clamp(22px,3.2vw,32px);color:var(--navy);line-height:1.6}
.a-hd p{color:var(--muted)}
.a-vols{display:flex;flex-wrap:wrap;gap:8px}
.a-vol{display:inline-flex;align-items:baseline;gap:4px;min-height:44px;padding:8px 14px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);font:inherit;font-weight:700;cursor:pointer}
.a-vol small{font-weight:400;color:var(--muted);font-size:12px}
.a-vol:hover{border-color:var(--water)}
.a-vol[aria-pressed=true]{background:var(--navy);border-color:var(--navy);color:#fff}
.a-vol[aria-pressed=true] small{color:#c6d6f3}
.a-panel{margin-top:16px;border-radius:18px;border:1px solid var(--line);background:#fff;overflow:hidden}
.a-panel[hidden]{display:none}
.a-panel__hd{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 18px;background:var(--water-l);color:var(--navy);font-weight:700}
.a-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;padding:10px 18px;border-top:1px solid var(--line);text-decoration:none}
.a-row img{width:46px;height:46px;border-radius:10px;object-fit:cover;background:#eef3fb}
.a-row span{min-width:0}
.a-row b{white-space:nowrap;color:#1f5fd0;font-size:14.5px}
.a-row b.q{color:var(--muted);font-weight:600}
.a-row:hover span{color:var(--navy);text-decoration:underline}

/* ---------- shapes ---------- */
.a-shapes{display:grid;gap:12px}
@media (min-width:760px){.a-shapes{grid-template-columns:repeat(3,minmax(0,1fr))}}
.a-shape{display:grid;grid-template-columns:96px 1fr;gap:16px;align-items:center;padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line);text-decoration:none}
.a-shape:hover{border-color:var(--water);box-shadow:var(--shadow)}
.a-shape__ic{height:96px;display:grid;place-items:center;border-radius:14px;background:var(--water-l)}
.a-shape__ic i{display:block;background:linear-gradient(90deg,#0d2a66,#2a5bc4 50%,#0d2a66);position:relative}
.a-shape__ic i::after{content:"";position:absolute;top:-7px;left:50%;width:30%;height:8px;transform:translateX(-50%);border-radius:3px;background:var(--cap)}
.a-shape__ic .v{width:44px;height:70px;border-radius:12px / 9px}
.a-shape__ic .h{width:76px;height:42px;border-radius:21px}
.a-shape__ic .c{width:58px;height:58px;border-radius:9px}
.a-shape b{display:block;font-size:17px}
.a-shape small{color:var(--muted);line-height:1.8;display:block}

/* ---------- layers ---------- */
.a-layers{display:grid;gap:14px;align-items:center;padding:clamp(18px,3vw,30px);border-radius:22px;background:#fff;border:1px solid var(--line)}
@media (min-width:860px){.a-layers{grid-template-columns:260px 1fr}}
.a-cut{display:flex;height:180px;border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.a-cut i{flex:1}
.a-cut i:nth-child(1){background:#2a5bc4}.a-cut i:nth-child(2){background:#1b1f2a}.a-cut i:nth-child(3){background:#f4f8ff}
.a-cut i:nth-child(4){flex:2.4;background:linear-gradient(180deg,#cfe3ff 0 30%,#7fb0ff 30%)}
.a-ll{display:grid;gap:10px}
.a-l{display:grid;grid-template-columns:18px 1fr;gap:10px;align-items:start}
.a-l i{width:18px;height:18px;border-radius:5px;margin-top:6px;box-shadow:inset 0 0 0 1px rgb(0 0 0/.12)}
.a-l b{display:block}
.a-l small{color:var(--muted)}
.a-types{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.a-types a{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:6px 12px;border-radius:10px;background:var(--water-l);color:var(--navy);text-decoration:none;font-weight:700;font-size:14px}
.a-types a small{font-weight:400;color:var(--muted)}

/* ---------- calculator ---------- */
.a-calc{display:grid;gap:18px;padding:clamp(20px,4vw,36px);border-radius:24px;background:linear-gradient(140deg,#173f8f,#0a2154);color:#e6efff}
@media (min-width:860px){.a-calc{grid-template-columns:1.1fr .9fr;align-items:center}}
.a-calc h2{font-family:var(--font-display);color:#fff;font-size:clamp(22px,3vw,30px);line-height:1.6}
.a-calc p{color:#c6d6f3}
.a-calc__f{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px}
.a-calc label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:#c6d6f3}
.a-calc input,.a-calc select{min-height:48px;border-radius:12px;border:1px solid rgb(255 255 255/.22);background:rgb(255 255 255/.08);color:#fff;font:inherit;font-size:17px;font-weight:700;padding:0 12px;width:100%}
.a-calc select option{color:#0f1f3d}
.a-calc__out{padding:20px;border-radius:18px;background:rgb(255 255 255/.08);border:1px solid rgb(255 255 255/.16);text-align:center}
.a-calc__out small{display:block;color:#b9cdf0}
.a-calc__out b{display:block;font-family:var(--font-display);font-size:clamp(30px,5vw,44px);color:#fff;line-height:1.6}
.a-calc__out .btn{margin-top:10px}
@media (max-width:420px){.a-calc__f{grid-template-columns:1fr 1fr}.a-calc__f label:last-child{grid-column:1/-1}}

.a-contact{display:grid;gap:20px;align-items:center;padding:clamp(22px,4vw,40px);border-radius:24px;background:#fff;border:1px solid var(--line)}
@media (min-width:860px){.a-contact{grid-template-columns:1.3fr 1fr}}
.a-contact h2{font-family:var(--font-display);color:var(--navy);font-size:clamp(22px,3vw,30px);line-height:1.6}
.a-contact p{color:var(--muted)}
.a-contact__cta{display:grid;gap:10px}
.a-faq details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:4px 18px;margin-bottom:10px}
.a-faq summary{cursor:pointer;font-weight:700;min-height:52px;display:flex;align-items:center}
.a-faq p{color:var(--muted);padding-bottom:12px}