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14px;display:flex}.demo-row-body{flex:1;min-width:0}.demo-row-top{justify-content:space-between;align-items:center;gap:10px;display:flex}.demo-row-name{white-space:nowrap;text-overflow:ellipsis;font-size:14px;font-weight:700;overflow:hidden}.demo-row-meta{color:var(--muted);white-space:nowrap;font-size:12px;font-weight:700}.demo-row-body .track{margin-top:8px}.demo-row-stats{text-align:center;min-width:64px}.demo-row-pct{font-size:15px;font-weight:800;display:block}.demo-row-speed{color:var(--accent2);font-size:11.5px;font-weight:700}.demo-row-actions{gap:6px;display:flex}.btn-row-action{background:var(--primary);color:#fff;border-radius:12px;width:34px;height:34px;padding:0}.btn-row-action.is-done{background:var(--chip);color:var(--accent2);cursor:default}.btn-row-ghost{width:34px;height:34px;color:var(--muted);border:1px solid var(--border);background:0 0;border-radius:12px;padding:0}.demo-foot{text-align:center;color:var(--muted);margin-top:16px;font-size:13px}.tutorial-card h2{margin:16px 0 12px;font-size:17px;font-weight:800}.tutorial-num{border-radius:13px;width:46px;height:46px;font-size:18px;font-weight:800}.tutorial-steps li{color:var(--muted);align-items:flex-start;font-size:13.5px;font-weight:400;line-height:1.55}.tutorial-steps svg{margin-top:3px}.faq-title{text-align:center;margin:20px 0 24px;font-size:26px;font-weight:800}.faq-list{flex-direction:column;gap:10px;display:flex}.faq-item{border-radius:14px;padding:0;overflow:hidden}.faq-item summary{cursor:pointer;justify-content:space-between;align-items:center;gap:12px;padding:18px 20px;font-size:15.5px;font-weight:700;list-style:none;display:flex}.faq-item summary::-webkit-details-marker{display:none}.faq-plus{background:var(--chip);width:26px;height:26px;color:var(--primary);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;transition:transform .25s;display:flex}.faq-item[open] .faq-plus{transform:rotate(45deg)}.faq-item>p{color:var(--muted);padding:0 20px 18px;font-size:14px;line-height:1.7}.release{grid-template-columns:auto 1fr;gap:20px;display:grid}.release-rail{flex-direction:column;align-items:center;display:flex}.release-dot{background:var(--primary);width:16px;height:16px;box-shadow:0 0 0 5px var(--ring);border-radius:50%}.release-line{background:var(--border);flex:1;width:2px;margin:6px 0}.release-body{padding-bottom:26px}.release-head{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.release-head h2{font-size:20px;font-weight:800}.release-tag{background:var(--chip);color:var(--primary);border-radius:100px;padding:3px 9px;font-size:11px;font-weight:800}.release-tag-major{background:var(--primary);color:#fff}.release-head time{color:var(--muted);font-size:13px;font-weight:600}.release-items{border-radius:14px;margin:12px 0 0;padding:8px 16px;list-style:none}.release-items li{color:var(--muted);border-bottom:1px solid var(--border);gap:10px;padding:8px 0;font-size:14px;line-height:1.5;display:flex}.release-items li:last-child{border-bottom:none}.release-items svg{color:var(--accent2);flex-shrink:0;margin-top:3px}.about-stat{text-align:center;border-radius:16px;padding:24px 12px}.about-stat .stat-l{margin-top:4px}.story-grid{grid-template-columns:1.1fr .9fr;align-items:stretch;gap:24px;display:grid}.story-card{border-radius:22px;padding:34px}.story-card h2{margin-bottom:16px;font-size:24px;font-weight:800}.story-card p{color:var(--muted);font-size:15px;line-height:1.85}.story-card p+p{margin-top:14px}.quote-card{background:linear-gradient(155deg, var(--primary), var(--accent));color:#fff;box-shadow:0 20px 48px var(--ring);border-radius:22px;flex-direction:column;justify-content:center;padding:36px;display:flex;position:relative;overflow:hidden}.quote-card:before{content:"";background:radial-gradient(60% 60% at 85% 10%,#ffffff38,#0000);position:absolute;inset:0}.quote-mark{opacity:.5;font-size:64px;font-weight:800;line-height:.6;position:relative}.quote-card p{margin-top:8px;font-size:20px;font-weight:700;line-height:1.55;position:relative}.value-card h3{margin:14px 0 6px;font-size:17px;font-weight:800}.value-card p{color:var(--muted);font-size:14px;line-height:1.65}.team-solo{justify-content:center;display:flex}.team-solo .team-card{width:100%;max-width:300px;padding:32px 24px}.team-card{text-align:center;padding:26px 16px}.team-card strong{margin-top:14px;font-size:15px;font-weight:800;display:block}.team-card small{color:var(--muted);margin-top:2px;font-size:12.5px;font-weight:600}.milestones{grid-template-columns:repeat(4,1fr);display:grid}.milestone{padding:0 12px}.milestone-rail{align-items:center;display:flex}.milestone-dot{background:var(--primary);width:14px;height:14px;box-shadow:0 0 0 5px var(--ring);border-radius:50%;flex-shrink:0}.milestone-line{background:var(--border);flex:1;height:2px}.milestone-year{color:var(--primary);margin:16px 0 6px;font-size:22px;font-weight:800;display:block}.milestone p{color:var(--muted);font-size:13.5px;line-height:1.6}.contact-grid{grid-template-columns:1fr 1.3fr;gap:24px;display:grid}.contact-info{flex-direction:column;gap:14px;display:flex}.contact-info-card{border-radius:16px;align-items:center;gap:14px;padding:18px;display:flex}.contact-info-card>span:last-child{flex-direction:column;display:flex}.contact-info-card small{color:var(--muted);font-size:12.5px;font-weight:600}.contact-info-card strong{font-size:15px;font-weight:700}.contact-form{border-radius:20px;padding:28px}.contact-single{max-width:620px;margin-inline:auto}.contact-reply-note{text-align:center;color:var(--muted);margin-top:12px;font-size:13px}.form-row-2{gap:14px}.field{margin-bottom:14px}.field label{color:var(--muted);margin-bottom:6px;font-size:12.5px;font-weight:700;display:block}.field input,.field textarea{border:1px solid var(--border);background:var(--bg2);width:100%;color:var(--fg);font:inherit;border-radius:11px;outline:none;padding:12px 14px;font-size:14px}.field input:focus,.field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--ring)}.field textarea{resize:vertical;min-height:110px}.field-error{color:#e5484d;margin-top:5px;font-size:12.5px;font-weight:600;display:block}.form-sent{text-align:center;color:var(--accent2);margin-top:12px;font-size:13.5px;font-weight:700}.auth-wrap{justify-content:center;align-items:center;min-height:calc(100vh - 68px);padding-block:50px;display:flex}.auth-card{border-radius:22px;width:100%;max-width:420px;padding:34px}.auth-logo{width:42px;height:42px;margin-inline:auto}.auth-title{text-align:center;margin:8px 0 4px;font-size:24px;font-weight:800}.auth-sub{text-align:center;color:var(--muted);margin-bottom:22px;font-size:14px}.auth-tabs{background:var(--bg2);border:1px solid var(--border);border-radius:12px;margin-bottom:20px;padding:4px;display:flex}.auth-tab{color:var(--muted);font:inherit;cursor:pointer;background:0 0;border:none;border-radius:9px;flex:1;padding:10px;font-size:14px;font-weight:800}.auth-tab.is-active{background:var(--card);color:var(--primary);box-shadow:var(--shadow)}.auth-forgot{text-align:end;margin:-6px 0 18px}.auth-forgot a{color:var(--primary);font-size:12.5px;font-weight:700}.auth-switch{text-align:center;color:var(--muted);margin-top:18px;font-size:13px}.auth-switch-cta{color:var(--primary);font:inherit;cursor:pointer;background:0 0;border:none;padding:0;font-size:13px;font-weight:800}.site-footer{background:var(--bg2);border-top:1px solid var(--border)}.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px;padding-block:48px 26px;display:grid}.footer-tagline{color:var(--muted);max-width:280px;margin-top:16px;font-size:13.5px;line-height:1.65}.footer-title{margin:0 0 12px;font-size:13px;font-weight:800}.footer-grid nav a{color:var(--muted);padding:5px 0;font-size:13.5px;font-weight:600;display:block}.footer-grid nav a:hover{color:var(--primary)}.footer-bottom{border-top:1px solid var(--border)}.footer-bottom-inner{color:var(--muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;padding-block:18px;font-size:12.5px;display:flex}.made-with{align-items:center;gap:5px;display:inline-flex}.heart{color:#ff4d6d;animation:1.3s ease-in-out infinite heartbeat;display:inline-flex}.pdm-logo{object-fit:cover;box-shadow:0 6px 16px var(--ring);display:block}.auth-logo{margin-inline:auto}.price-grid{grid-template-columns:repeat(3,1fr);align-items:stretch;gap:20px;display:grid}.price-card{background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:22px;flex-direction:column;padding:30px 26px;display:flex;position:relative}.price-card-featured{background:linear-gradient(160deg, var(--primary), var(--accent));color:#fff;box-shadow:0 26px 60px var(--ring);border-color:#0000}@media (width>=861px){.price-card-featured{z-index:1;transform:scale(1.04)}}.price-badge{top:0;color:var(--primary);background:#fff;border-radius:100px;align-items:center;padding:6px 14px;font-size:12px;font-weight:800;display:inline-flex;position:absolute;inset-inline-end:24px;transform:translateY(-50%);box-shadow:0 8px 18px #0000002e}.price-head h2{font-size:20px;font-weight:800}.price-desc{color:var(--muted);margin-top:4px;font-size:13.5px}.price-card-featured .price-desc{color:#ffffffd9}.price-amount{align-items:baseline;gap:8px;margin-top:22px;display:flex}.price-value{font-size:40px;font-weight:800;line-height:1}.price-unit{color:var(--muted);font-size:15px;font-weight:700}.price-card-featured .price-unit{color:#ffffffd9}.price-period{color:var(--muted);margin-top:6px;font-size:13px}.price-card-featured .price-period{color:#ffffffd9}.price-cta{margin-top:22px}.price-items{gap:12px;margin-top:24px}.price-items .check-chip{background:var(--chip);color:var(--accent2)}.price-card-featured .price-items{color:#fff}.price-card-featured .price-items .check-chip{color:#fff;background:#fff3}.price-card-featured .price-items svg{color:#fff}.price-includes{border-radius:22px;padding:30px 32px}.price-includes h2{margin-bottom:18px;font-size:19px;font-weight:800}.price-includes-grid{grid-template-columns:repeat(3,1fr);gap:12px 24px;margin:0;padding:0;list-style:none;display:grid}.price-includes-grid li{align-items:center;gap:10px;font-size:14px;font-weight:600;display:flex}.price-includes-grid svg{color:var(--accent2);flex-shrink:0}.guarantee-banner{background:linear-gradient(160deg, var(--chip), transparent);border:1px solid var(--primary);border-radius:20px;align-items:center;gap:18px;padding:24px 28px;display:flex}.guarantee-icon{background:var(--card);width:58px;height:58px;color:var(--accent2);box-shadow:var(--shadow);border-radius:16px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.guarantee-banner h2{font-size:18px;font-weight:800}.guarantee-banner p{color:var(--muted);margin-top:4px;font-size:14px;line-height:1.6}.free-plan{text-align:center;max-width:620px;margin-inline:auto;padding:40px 34px}.free-plan .price-head,.free-plan .price-period{text-align:center}.free-plan .price-amount{justify-content:center;margin-top:18px}.free-plan .price-value{font-size:46px}.free-plan .price-cta{margin-inline:auto;max-width:300px;margin-top:24px}.free-note{color:#ffffffd9;margin-top:12px;font-size:13px}.free-sep{border:none;border-top:1px solid #ffffff40;margin:26px 0 20px}.free-features-title{opacity:.95;margin-bottom:16px;font-size:14px;font-weight:800}.free-features{text-align:start;grid-template-columns:1fr 1fr;gap:12px 22px;display:grid}.mobile-cta{margin-top:8px}.privacy-updated{color:var(--muted);margin-top:12px;font-size:13px;font-weight:600}.privacy-body{flex-direction:column;gap:22px;display:flex}.privacy-section{gap:16px;display:flex}.privacy-num{background:var(--chip);width:34px;height:34px;color:var(--primary);border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;font-size:15px;font-weight:800;display:flex}.privacy-section h2{margin-bottom:6px;font-size:18px;font-weight:800}.privacy-section p{color:var(--muted);font-size:15px;line-height:1.85}.privacy-contact{border-radius:18px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-top:36px;padding:22px 26px;display:flex}.privacy-contact p{font-weight:700}.release-panel{border-radius:22px;padding:28px 30px}.release-panel-head{align-items:center;gap:12px;margin-bottom:18px;display:flex}.release-live-badge{color:var(--accent2)}.release-chan{background:var(--chip);color:var(--primary);border-radius:100px;padding:4px 11px;font-size:12px;font-weight:800}.release-chan.is-beta{color:#d97706;background:#f59e0b29}.release-chan.is-revoked-tag{color:#e5484d;background:#e5484d24}.release-panel-grid{grid-template-columns:1.2fr 1fr;align-items:start;gap:28px;display:grid}.release-panel-title{font-size:26px;font-weight:800}.release-panel-title span{color:var(--primary)}.release-panel-type{color:var(--muted);align-items:center;gap:6px;margin-top:6px;font-size:14px;font-weight:600;display:flex}.release-facts{flex-wrap:wrap;gap:20px 34px;margin:20px 0;display:flex}.release-facts div{flex-direction:column;gap:3px;display:flex}.release-facts dt{color:var(--muted);font-size:12.5px;font-weight:700}.release-facts dd{margin:0;font-size:16px;font-weight:800}.release-download-btn{margin-top:4px}.release-verify-note{color:var(--muted);margin-top:12px;font-size:12.5px;line-height:1.6}.release-panel-side{flex-direction:column;gap:14px;display:flex}.checksum-block{background:var(--bg2);border:1px solid var(--border);border-radius:14px;flex-direction:column;gap:8px;min-width:0;padding:14px 16px;display:flex}.checksum-label{color:var(--muted);text-transform:uppercase;letter-spacing:.5px;font-size:11.5px;font-weight:800}.checksum-value{word-break:break-all;color:var(--fg);background:0 0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;line-height:1.5}.js-copy{align-self:flex-start}.js-copy.is-copied{background:var(--accent2);color:#fff}.release-notes-block{border-top:1px solid var(--border);margin-top:24px;padding-top:20px}.release-notes-block h3{margin-bottom:12px;font-size:16px;font-weight:800}.release-empty{color:var(--muted);align-items:center;gap:14px;padding:26px 28px;display:flex}.release-empty p{font-size:15px;line-height:1.6}.release-empty svg{color:var(--primary);flex-shrink:0}.release-revoked-note{border-color:#e5484d;align-items:center;gap:14px;padding:20px 24px;display:flex}.release-revoked-note svg{color:#e5484d;flex-shrink:0}.release-revoked-note p{color:var(--fg);font-size:14px}.releases-list{flex-direction:column;gap:12px;display:flex}.release-row{justify-content:space-between;align-items:center;gap:18px;padding:20px 24px;display:flex}.release-row.is-revoked{opacity:.72}.release-row-head{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.release-row-head h2{font-size:20px;font-weight:800}.release-row-meta{color:var(--muted);margin-top:6px;font-size:13px;font-weight:600}.release-row-actions{flex-shrink:0;gap:8px;display:flex}.release-back{color:var(--primary);font-weight:700}@media (width<=1024px){.hero{grid-template-columns:1fr;gap:40px;padding-top:44px}.hero h1{font-size:42px}.ext-grid{grid-template-columns:1fr;gap:34px}.grid-4{grid-template-columns:repeat(2,1fr)}.milestones{grid-template-columns:repeat(2,1fr);row-gap:28px}.footer-grid{grid-template-columns:1fr 1fr}.price-grid{grid-template-columns:1fr;max-width:460px;margin-inline:auto}.price-card-featured{transform:none}.price-includes-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=860px){.main-nav,.btn-plain,.btn-cta{display:none}.nav-burger{display:inline-flex}.grid-3,.dl-grid,.story-grid,.contact-grid,.grid-2{grid-template-columns:1fr}.detail-card{grid-template-columns:1fr;gap:0}.detail-visual{min-height:150px}.specs-grid{grid-template-columns:repeat(2,1fr)}.demo-shell{grid-template-columns:1fr}.demo-side{border-inline-end:none;border-bottom:1px solid var(--border)}.demo-cats{flex-flow:wrap}.demo-cat{width:auto}.demo-cat-count{margin-inline-start:6px}.compare-row{grid-template-columns:1.4fr 1fr 1fr}.ext-cards{flex-direction:column}.release-panel-grid{grid-template-columns:1fr;gap:22px}}@media (width<=560px){.container{padding-inline:18px}.section{padding-block:44px}.hero h1{font-size:30px}.hero .lead,.lead{font-size:16px}.page-hero{padding-top:44px}.page-hero h1{font-size:30px}.section-head h2,.ext-grid h2,.compare-title,.story-card h2,.price-includes h2{font-size:24px}.cta-banner{padding:40px 22px}.cta-banner h2{font-size:26px}.cta-banner p{font-size:15px}.hero-actions .btn,.section-cta .btn{width:100%}.hero-stats{flex-wrap:wrap;gap:20px 30px}.stat-n{font-size:26px}.grid-4,.specs-grid,.milestones,.form-row-2,.price-includes-grid,.free-features{grid-template-columns:1fr}.free-plan{padding:32px 22px}.price-includes{padding:24px}.guarantee-banner{text-align:center;flex-direction:column;align-items:center}.demo-head{padding-top:28px}.demo-row-stats{display:none}.demo-row{gap:10px;padding:11px 12px}.brand-sub{display:none}.trust-bar{gap:16px 22px}.compare-row{grid-template-columns:1fr;gap:4px;padding:14px 18px}.compare-row .compare-other:before{content:"↔ ";opacity:.5}.dl-hero-card,.dl-details,.story-card,.quote-card,.contact-form{padding:26px 22px}.footer-bottom-inner{flex-direction:column;align-items:flex-start;gap:8px}.release-row{flex-direction:column;align-items:flex-start;gap:14px}.release-row-actions{width:100%}.release-row-actions .btn{flex:1}.release-panel{padding:24px 20px}.release-facts{gap:14px 24px}}@media (width<=380px){.hero h1{font-size:27px}.price-value{font-size:34px}.header-inner{gap:10px}.btn-chip span{display:none}}

/* Real PDM product screenshots — 2026-08-04 */
.product-shot{position:relative;overflow:hidden;border:1px solid var(--border);border-radius:18px;background:#0b1120;box-shadow:var(--shadow)}
.product-shot img{display:block;width:100%;height:auto;aspect-ratio:8/5;object-fit:cover}
.product-shot-hero{transform:perspective(1200px) rotateY(-1.5deg)}
[dir=rtl] .product-shot-hero{transform:perspective(1200px) rotateY(1.5deg)}
.product-shot-hero figcaption{position:absolute;inset-inline-end:14px;bottom:14px;display:inline-flex;align-items:center;gap:7px;padding:7px 11px;border:1px solid rgba(255,255,255,.13);border-radius:999px;color:#e8eefc;background:rgba(9,15,29,.82);backdrop-filter:blur(10px);font-size:11.5px;font-weight:800}
.product-gallery .section-head .lead{margin-inline:auto}
.product-gallery-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.product-gallery-card{overflow:hidden;padding:10px;border-radius:24px}
.product-gallery-card .product-shot{border-radius:17px;box-shadow:none}
.product-gallery-card figcaption{display:flex;flex-direction:column;gap:6px;padding:18px 14px 14px}
.product-gallery-card figcaption strong{font-size:17px;font-weight:800}
.product-gallery-card figcaption span{color:var(--muted);font-size:13.5px;line-height:1.75}
@media(max-width:860px){.product-gallery-grid{grid-template-columns:1fr}}
@media(max-width:560px){.product-shot-hero,[dir=rtl] .product-shot-hero{transform:none;border-radius:14px}.product-shot-hero figcaption{inset-inline-end:9px;bottom:9px}.product-gallery-card{padding:7px;border-radius:18px}}

/* ---------- Help / documentation layout (2026-08-06) ----------
   A real docs page: sticky section nav beside numbered steps that each carry
   a screenshot of the actual product. Logical properties throughout, so the
   same rules serve the RTL (fa) and LTR (en) sites without a mirrored copy. */
.docs-layout { display: grid; grid-template-columns: 232px minmax(0, 1fr); gap: 38px; align-items: start; }
.docs-nav { position: sticky; top: 92px; }
.docs-nav-title { font-size: 11.5px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.docs-nav ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.docs-nav a { display: block; padding: 9px 13px; border-radius: 10px; font-size: 13.5px; font-weight: 600; color: var(--muted); text-decoration: none; border-inline-start: 2px solid transparent; transition: background .15s, color .15s; }
.docs-nav a:hover { background: var(--chip); color: var(--text); }

.docs-section { scroll-margin-top: 96px; }
.docs-section + .docs-section { margin-top: 46px; }
.docs-section > h2 { font-size: 21px; font-weight: 800; margin-bottom: 8px; }
.docs-section > p.docs-lead { font-size: 14.5px; line-height: 1.75; color: var(--muted); margin-bottom: 20px; }

.docs-step { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 14px; }
.docs-step + .docs-step { margin-top: 22px; }
.docs-step-n { display: flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 10px; background: var(--chip); color: var(--accent2); font-size: 13.5px; font-weight: 800; flex-shrink: 0; }
.docs-step h3 { font-size: 15.5px; font-weight: 700; margin-bottom: 5px; }
.docs-step p { font-size: 14px; line-height: 1.75; color: var(--muted); }
.docs-step ul { list-style: none; margin: 10px 0 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.docs-step ul li { display: flex; align-items: flex-start; gap: 9px; font-size: 13.5px; line-height: 1.65; }
.docs-step ul svg { color: var(--accent2); flex-shrink: 0; margin-top: 3px; }

.docs-figure { margin: 16px 0 0; }
.docs-figure img { display: block; width: 100%; height: auto; border-radius: 14px; border: 1px solid var(--border); box-shadow: var(--shadow); background: var(--card); }
.docs-figure figcaption { margin-top: 9px; font-size: 12.5px; color: var(--muted); text-align: center; }

.docs-callout { display: flex; gap: 14px; padding: 18px 20px; border-radius: 16px; background: var(--chip); border: 1px solid var(--border); margin-bottom: 24px; }
.docs-callout-icon { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 12px; background: var(--card); color: var(--accent2); flex-shrink: 0; }
.docs-callout h3 { font-size: 15px; font-weight: 800; margin-bottom: 5px; }
.docs-callout p { font-size: 13.5px; line-height: 1.7; color: var(--muted); }
.docs-callout-warn { border-color: var(--primary); }

@media (max-width: 900px) {
    .docs-layout { grid-template-columns: minmax(0, 1fr); gap: 24px; }
    .docs-nav { position: static; }
    .docs-nav ol { flex-direction: row; flex-wrap: wrap; gap: 7px; }
    .docs-nav a { background: var(--chip); border-inline-start: none; padding: 7px 12px; font-size: 12.5px; }
}

/* ---------- Knowledge base (imported "PDM Knowledge Base" design, 2026-08-06)
   Ported to the site's own tokens so it follows the existing light/dark theme
   instead of hard-coding the design's two palettes. Logical properties only,
   so one rule set serves the RTL (fa) and LTR (en) sites. ---------- */
.kb-bar { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); border-bottom: 1px solid var(--border); }
.kb-bar-inner { height: 62px; display: flex; align-items: center; gap: 18px; }
.kb-brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; text-decoration: none; color: var(--text); font-size: 14.5px; font-weight: 700; }
.kb-brand:hover { color: var(--text); }
.kb-chip { padding: 2px 9px; border-radius: 14px; background: var(--chip); color: var(--accent2); font-size: 10.5px; font-weight: 700; white-space: nowrap; }
.kb-search { margin-inline-start: auto; display: flex; align-items: center; gap: 9px; height: 38px; padding: 0 13px; background: var(--card); border: 1px solid var(--border); border-radius: 10px; width: 300px; max-width: 40vw; color: var(--muted); }
.kb-search input { border: none; background: transparent; outline: none; font-family: inherit; font-size: 12.5px; color: var(--text); width: 100%; }

.kb-layout { display: grid; grid-template-columns: 246px minmax(0, 1fr); gap: 36px; align-items: start; padding-block: 30px 70px; }

.kb-side { position: sticky; top: 78px; max-height: calc(100vh - 96px); overflow-y: auto; padding-block: 4px; }
.kb-group { margin-bottom: 22px; }
.kb-group-head { display: flex; align-items: center; gap: 8px; margin-bottom: 9px; color: var(--muted); }
.kb-group-head span { font-size: 11px; font-weight: 800; letter-spacing: .5px; }
.kb-group-items { display: flex; flex-direction: column; gap: 1px; }
.kb-link { display: block; padding: 8px 11px; border-radius: 8px; font-size: 12.5px; font-weight: 500; color: var(--muted); text-decoration: none; border-inline-start: 2px solid transparent; line-height: 1.6; }
.kb-link:hover { background: var(--chip); color: var(--text); }
.kb-link-on { background: var(--chip); color: var(--accent2); font-weight: 700; border-inline-start-color: var(--accent2); }
.kb-empty { font-size: 12.5px; color: var(--muted); padding: 8px 11px; }

.kb-article { min-width: 0; }
.kb-crumbs { display: flex; align-items: center; gap: 7px; font-size: 11.5px; color: var(--muted); margin-bottom: 14px; }
.kb-crumbs a { color: var(--muted); text-decoration: none; }
.kb-crumbs a:hover { color: var(--accent2); }
[dir="rtl"] .kb-crumb-sep { transform: scaleX(-1); }
.kb-article h1 { font-size: 30px; font-weight: 800; line-height: 1.35; margin: 0 0 12px; }
.kb-intro { font-size: 14.5px; color: var(--muted); line-height: 1.85; margin: 0 0 18px; max-width: 64ch; }

.kb-meta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; padding: 12px 16px; border: 1px solid var(--border); border-radius: 11px; background: var(--card); margin-bottom: 28px; }
.kb-meta span { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--muted); }
.kb-meta svg { color: var(--muted); flex-shrink: 0; }
.kb-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent2); display: inline-block; }

.kb-figure { margin: 0 0 28px; }
.kb-figure img { display: block; width: 100%; height: auto; border-radius: 14px; border: 1px solid var(--border); box-shadow: var(--shadow); }
.kb-figure figcaption { margin-top: 9px; font-size: 12.5px; color: var(--muted); text-align: center; }

.kb-step { display: grid; grid-template-columns: 36px minmax(0, 1fr); gap: 16px; }
.kb-step-rail { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.kb-step-n { width: 36px; height: 36px; flex-shrink: 0; border-radius: 10px; display: flex; align-items: center; justify-content: center; background: var(--primary); color: #fff; font-size: 14px; font-weight: 700; }
.kb-step-line { flex: 1; width: 2px; background: var(--border); border-radius: 2px; min-height: 16px; }
.kb-step-body { min-width: 0; padding-block: 4px 26px; }
.kb-step-body h2 { font-size: 16px; font-weight: 700; margin: 0 0 7px; }
.kb-step-body p { font-size: 13.5px; color: var(--muted); line-height: 1.85; margin: 0; max-width: 62ch; }
.kb-code { margin-top: 11px; padding: 11px 14px; border: 1px solid var(--border); border-radius: 9px; background: var(--chip); font-family: 'Cascadia Mono', Consolas, monospace; font-size: 12px; color: var(--text); text-align: start; overflow-x: auto; white-space: pre; }
.kb-note { margin-top: 11px; display: flex; gap: 10px; padding: 11px 14px; border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent); border-radius: 9px; background: color-mix(in srgb, var(--primary) 7%, transparent); }
.kb-note svg { color: var(--accent2); flex-shrink: 0; margin-top: 2px; }
.kb-note span { font-size: 12.5px; color: var(--muted); line-height: 1.75; }

.kb-related { margin-top: 22px; padding-top: 26px; border-top: 1px solid var(--border); }
.kb-related-title { font-size: 11px; font-weight: 800; letter-spacing: .5px; color: var(--muted); margin: 0 0 13px; }
.kb-related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 11px; }
.kb-related-card { display: block; padding: 14px 15px; border: 1px solid var(--border); border-radius: 11px; background: var(--card); text-decoration: none; }
.kb-related-card:hover { border-color: var(--primary); }
.kb-related-name { display: block; font-size: 13px; font-weight: 700; color: var(--text); margin-bottom: 4px; line-height: 1.5; }
.kb-related-group { display: block; font-size: 11.5px; color: var(--muted); }

.kb-feedback { margin-top: 30px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; padding: 16px 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--card); }
.kb-feedback-q { flex: 1; font-size: 13px; font-weight: 600; min-width: 180px; }
.kb-feedback-btns { display: flex; gap: 8px; }
.kb-vote { height: 36px; padding: 0 18px; border: 1px solid var(--border); background: transparent; border-radius: 9px; cursor: pointer; font-family: inherit; font-size: 12.5px; font-weight: 600; color: var(--muted); }
.kb-vote:hover { border-color: var(--primary); color: var(--text); }
.kb-feedback-thanks { font-size: 13px; font-weight: 600; color: var(--accent2); }

@media (max-width: 900px) {
    .kb-layout { grid-template-columns: minmax(0, 1fr); gap: 22px; padding-block: 22px 50px; }
    .kb-side { position: static; max-height: none; overflow: visible; }
    .kb-group-items { flex-direction: row; flex-wrap: wrap; gap: 7px; }
    .kb-link { background: var(--chip); border-inline-start: none; }
    .kb-link-on { border-inline-start: none; }
    .kb-article h1 { font-size: 24px; }
    .kb-search { width: auto; flex: 1; }
    .kb-brand span:not(.kb-chip) { display: none; }
}

/* ---------- Setup walkthrough "film" (2026-08-06) ----------
   Auto-advancing screenshot player for the install article. A real <video>
   would mean encoding, hosting and a download the reader cannot skim; a
   cross-faded PNG sequence plays instantly, stays crisp at any zoom, and each
   frame is still a linkable still image. Honours prefers-reduced-motion. */
.kb-film { margin: 0 0 30px; border: 1px solid var(--border); border-radius: 16px; overflow: hidden; background: var(--card); }
.kb-film-stage { position: relative; aspect-ratio: 760 / 548; background: var(--chip); }
.kb-film-stage img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; opacity: 0; transition: opacity .45s ease; }
.kb-film-stage img.on { opacity: 1; }
.kb-film-bar { display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-top: 1px solid var(--border); flex-wrap: wrap; }
.kb-film-play { width: 34px; height: 34px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; border: 1px solid var(--border); background: transparent; border-radius: 9px; cursor: pointer; color: var(--text); }
.kb-film-play:hover { border-color: var(--primary); }
.kb-film-steps { display: flex; gap: 6px; flex: 1; flex-wrap: wrap; }
.kb-film-step { padding: 6px 12px; border: 1px solid var(--border); background: transparent; border-radius: 8px; cursor: pointer; font-family: inherit; font-size: 12px; font-weight: 600; color: var(--muted); }
.kb-film-step:hover { color: var(--text); }
.kb-film-step[aria-current="true"] { background: var(--chip); color: var(--accent2); border-color: var(--accent2); }
.kb-film-cap { padding: 0 14px 13px; font-size: 12.5px; color: var(--muted); }
.kb-film-track { height: 3px; background: var(--border); }
.kb-film-fill { height: 100%; width: 0; background: var(--accent2); transition: width .2s linear; }

@media (prefers-reduced-motion: reduce) {
    .kb-film-stage img { transition: none; }
}
@media (max-width: 600px) {
    .kb-film-step { font-size: 11px; padding: 5px 9px; }
}

/* ---------- Contact-form captcha (2026-08-06) ----------
   The sum and its answer box sit on one line. Both are forced LTR so the
   digits read left-to-right inside the RTL page; `unicode-bidi: isolate`
   keeps the question from reordering against the surrounding text. */
.captcha-row { display: flex; align-items: center; gap: 10px; }
.captcha-q {
    flex-shrink: 0; padding: 0 14px; height: 46px; display: flex; align-items: center;
    border: 1px solid var(--border); border-radius: 12px; background: var(--chip);
    font-family: 'Cascadia Mono', Consolas, monospace; font-size: 16px; font-weight: 700;
    color: var(--text); letter-spacing: 1px; user-select: none;
    unicode-bidi: isolate;
}
.captcha-row input { flex: 1; min-width: 0; text-align: center; unicode-bidi: isolate; }

/* ---------- Captcha, second pass (2026-08-06) ----------
   The first version put a separate chip beside a separate input, which read as
   two unrelated controls. This makes it ONE control: a single bordered field
   whose left side states the sum and whose right side takes the answer, so it
   is obviously one question with one box. Rules are appended after the first
   set, so they win without editing the earlier block. */
.captcha-row {
    display: flex; align-items: stretch; gap: 0;
    border: 1px solid var(--border); border-radius: 12px;
    background: var(--surface, var(--card)); overflow: hidden;
    transition: border-color .15s;
}
.captcha-row:focus-within { border-color: var(--primary); }

.captcha-q {
    flex-shrink: 0; display: flex; align-items: center; height: auto;
    padding: 0 18px; border: none; border-radius: 0;
    border-inline-end: 1px solid var(--border);
    background: var(--chip);
    font-family: 'Cascadia Mono', Consolas, monospace;
    font-size: 17px; font-weight: 700; letter-spacing: 2px;
    color: var(--text); user-select: none; unicode-bidi: isolate;
}

.captcha-row input {
    flex: 1; min-width: 0; height: 48px;
    border: none !important; background: transparent !important;
    border-radius: 0 !important; box-shadow: none !important;
    text-align: center; font-size: 17px; font-weight: 700;
    font-family: 'Cascadia Mono', Consolas, monospace;
    letter-spacing: 2px; unicode-bidi: isolate;
}
.captcha-row input:focus { outline: none; }

@media (max-width: 480px) {
    .captcha-q { padding: 0 13px; font-size: 15px; letter-spacing: 1px; }
    .captcha-row input { font-size: 15px; }
}

/* ---------- Captcha, bidi fix (2026-08-07) ----------
   `unicode-bidi: isolate` only stops the equation from reordering against the
   text around it — it does NOT set a direction, so inside the RTL page the
   equation still laid itself out right-to-left and the "=" ended up facing away
   from the answer box.

   A sum is arithmetic notation, not prose: it is left-to-right in Persian and
   English alike. So the whole control is pinned to `direction: ltr`. That puts
   the question on the left, "=" immediately against the answer box on the
   right, and makes the rendering identical in both locales instead of depending
   on the page's direction. Only the control is flipped; the label above it and
   any validation message stay right-to-left with the rest of the form. */
.captcha-row {
    direction: ltr;
    unicode-bidi: isolate;
}

.captcha-q {
    direction: ltr;
    /* With the row now LTR, the inline-end edge is the right-hand one, which is
       the side that meets the answer box — so the divider lands correctly. */
    border-inline-end: 1px solid var(--border);
    border-inline-start: none;
}
