*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:5.5rem;-webkit-text-size-adjust:100%;overflow-x:clip}
body{margin:0;overflow-x:clip;max-width:100vw;background:var(--bg);color:var(--text);font:400 1rem/1.7 var(--font-body);-webkit-font-smoothing:antialiased;transition:background var(--t-normal),color var(--t-normal)}
img{display:block;max-width:100%}
a{color:inherit}
h1,h2,h3,p,ul,ol{margin:0}ul,ol{padding:0;list-style:none}
p,h1,h2,h3{overflow-wrap:break-word;word-break:break-word}
svg{width:1.25rem;height:1.25rem;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--radius-sm)}
[hidden]{display:none!important}
.skip{position:fixed;inset-block-start:.5rem;inset-inline-start:.5rem;z-index:200;padding:.6rem 1rem;background:var(--accent-deep);color:var(--on-accent);transform:translateY(-200%)}
.skip:focus{transform:none}
.wrap{max-width:1320px;margin-inline:auto}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:0}
.eyebrow{font-size:.78rem;letter-spacing:.24em;text-transform:uppercase;color:var(--muted);margin-bottom:.9rem}
:root[lang="fa"] .eyebrow{letter-spacing:0;text-transform:none;font-size:.9rem}
.sec__h{font:400 clamp(2.3rem,6vw,4.6rem)/1.05 var(--font-display);letter-spacing:-.02em;text-wrap:balance;max-width:16ch}
:root[lang="fa"] .sec__h{font-weight:700;line-height:1.3;letter-spacing:0}

/* Nav */
.nav{position:fixed;inset-inline:0;top:0;z-index:60;display:flex;align-items:center;justify-content:space-between;gap:1.5rem;padding:1.3rem clamp(1.25rem,5vw,3.5rem);transition:background var(--t-normal),backdrop-filter var(--t-normal),padding var(--t-normal),border-color var(--t-normal);border-bottom:1px solid transparent}
.nav.is-scrolled{background:var(--glass);backdrop-filter:blur(var(--blur-md));-webkit-backdrop-filter:blur(var(--blur-md));padding-block:.8rem;border-color:var(--line)}
.brand{display:flex;align-items:center;gap:.9rem;text-decoration:none;min-height:2.75rem}
.brand__mark{font:400 1.6rem/1 var(--font-display);letter-spacing:-.04em}
.brand__name{font-size:.76rem;letter-spacing:.22em;text-transform:uppercase}
:root[lang="fa"] .brand__name{letter-spacing:0;font-size:.92rem;text-transform:none}
.nav__links{display:flex;gap:clamp(1.2rem,2.5vw,2.2rem);font-size:.9rem}
.nav__links a{position:relative;text-decoration:none;padding-block:.5rem;color:var(--muted);transition:color var(--t-fast);white-space:nowrap}
.nav__links a:hover,.nav__links a[aria-current]{color:var(--text)}
.nav__links a::after{content:"";position:absolute;inset-inline:0;bottom:.1rem;height:1px;background:var(--accent);transform:scaleX(0);transition:transform var(--t-normal) var(--ease)}
.nav__links a[aria-current]::after{transform:scaleX(1)}
.nav__tools{display:flex;align-items:center;gap:.6rem;font-size:.85rem}
.lang{display:flex;align-items:center;gap:.1rem;color:var(--muted)}
.lang button,.lang a{display:grid;place-items:center;text-decoration:none;min-width:2.6rem;min-height:2.75rem;letter-spacing:.08em;color:var(--muted)}
.lang button[aria-pressed="true"],.lang a[aria-current="true"]{color:var(--text);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:.4rem}
.icon-btn{display:grid;place-items:center;width:2.75rem;height:2.75rem;flex-shrink:0;border:1px solid var(--line);border-radius:50%;transition:border-color var(--t-fast)}
.icon-btn:hover{border-color:var(--accent)}
.i-moon{display:none}:root[data-theme="light"] .i-moon{display:block}:root[data-theme="light"] .i-sun{display:none}
.menu-btn{display:none}

/* Mobile full-screen nav overlay */
.nav-overlay{position:fixed;inset:0;z-index:55;background:var(--bg);opacity:0;visibility:hidden;transition:opacity var(--t-normal) var(--ease),visibility var(--t-normal);display:none}
body.nav-open .nav-overlay{opacity:1;visibility:visible}
body.nav-open{overflow:hidden}

/* Hero — asymmetric, no card, no overflow */
.hero{position:relative;min-height:100svh;min-height:100dvh;display:grid;align-items:center;overflow:clip;isolation:isolate;
  background:radial-gradient(60% 65% at 80% 38%,color-mix(in srgb,var(--accent-deep) 24%,transparent),transparent 72%),var(--bg)}
.hero__media{position:absolute;inset-block:0;inset-inline-end:0;width:min(58vw,920px);max-width:100vw;z-index:-1;pointer-events:none}
.hero__media img{width:100%;height:100%;object-fit:cover;object-position:50% 14%;
  -webkit-mask-image:linear-gradient(to right,transparent,#000 46%);mask-image:linear-gradient(to right,transparent,#000 46%);
  animation:media-in 1.7s var(--ease) both}
[dir="rtl"] .hero__media img{-webkit-mask-image:linear-gradient(to left,transparent,#000 46%);mask-image:linear-gradient(to left,transparent,#000 46%)}
.hero__media.has-img::before{content:"";position:absolute;inset-block:9% 15%;inset-inline:15% 7%;border:1px solid color-mix(in srgb,var(--accent) 45%,transparent);border-radius:50%;pointer-events:none}
.hero__body{position:relative;padding:clamp(6.5rem,16vh,9rem) var(--gutter) clamp(3.5rem,8vh,6rem);max-width:min(100%,62rem);width:100%}
.pill{display:inline-flex;align-items:center;gap:.65rem;font-size:.72rem;letter-spacing:.24em;text-transform:uppercase;color:var(--muted)}
:root[lang="fa"] .pill{letter-spacing:0;font-size:.92rem;text-transform:none}
.pill::before{content:"";width:.45rem;height:.45rem;flex-shrink:0;border-radius:50%;background:var(--accent)}
.hero h1{margin-top:1.6rem;font:400 clamp(2.6rem,8.2vw,7.4rem)/.98 var(--font-display);letter-spacing:-.02em;text-transform:uppercase;max-width:100%}
.hero h1 .l{display:block;max-width:100%}
.hero h1 .l--accent{font-style:italic;color:var(--accent)}
:root[lang="fa"] .hero h1{font-weight:800;line-height:1.3;letter-spacing:0;text-transform:none;font-size:clamp(2.3rem,7vw,6rem)}
:root[lang="fa"] .hero h1 .l--accent{font-style:normal}
.hero__lead{margin-top:1.8rem;max-width:32rem;font-size:clamp(1rem,1.4vw,1.25rem);color:var(--muted);text-wrap:pretty}
.hero__cta{display:flex;flex-wrap:wrap;align-items:center;column-gap:2.2rem;row-gap:1rem;margin-top:2.3rem}
.cta{display:inline-flex;align-items:center;gap:.6rem;min-height:2.75rem;font-weight:500;text-decoration:none;position:relative}
.cta::after{content:"";position:absolute;inset-inline:0;bottom:.2rem;height:1px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform var(--t-normal) var(--ease)}
[dir="rtl"] .cta::after{transform-origin:right}
.cta:hover::after{transform:scaleX(1)}
.cta--primary{color:var(--accent)}
.cta svg{width:1.1rem;height:1.1rem;transition:transform var(--t-normal) var(--ease)}
.cta:hover svg{transform:translate(3px,-3px)}
[dir="rtl"] .cta svg{transform:scaleX(-1)}[dir="rtl"] .cta:hover svg{transform:scaleX(-1) translate(3px,-3px)}
.hero__scroll{position:absolute;inset-inline:0;bottom:1.5rem;margin-inline:auto;width:max-content;display:grid;justify-items:center;gap:.4rem;text-decoration:none;font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;color:var(--muted);min-height:2.75rem}
.hero__scroll svg{animation:nudge 2.4s ease-in-out infinite}
:root[lang="fa"] .hero__scroll{letter-spacing:0;text-transform:none;font-size:.85rem}
.sk{height:1.2rem;border-radius:var(--radius-sm);background:linear-gradient(90deg,var(--surface),var(--surface-2),var(--surface));background-size:200% 100%;animation:shimmer 1.4s linear infinite;margin-bottom:1.2rem;max-width:100%}
.sk--pill{width:10rem;height:1.6rem;border-radius:var(--radius-pill)}.sk--h{height:4.5rem;width:min(28rem,90%)}.sk--s{width:min(16rem,60%)}.sk--p{width:min(22rem,80%)}
[data-seq]{animation:rise .9s var(--ease) both;animation-delay:calc(var(--i,0)*90ms + 120ms)}
.hero__err{display:grid;gap:1rem;justify-items:start;color:var(--muted)}

/* Sections — continuous flow, spacing instead of borders */
.sec{padding-block:var(--space-xl);padding-inline:var(--gutter)}
.sec--about{padding-top:calc(var(--space-xl) * .7)}

/* About — asymmetric overlap */
.about-grid{position:relative;display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);column-gap:clamp(2rem,6vw,5rem);align-items:start;max-width:1320px;margin-inline:auto}
.about-word{grid-column:1/-1;grid-row:1;font:400 clamp(3.5rem,13vw,11rem)/.85 var(--font-display);color:var(--surface-2);letter-spacing:-.03em;user-select:none;margin-bottom:clamp(-2.5rem,-6vw,-4rem);pointer-events:none}
:root[lang="fa"] .about-word{font-family:var(--font-body);font-weight:800}
.about-media{grid-column:1;grid-row:2;align-self:start;position:relative;z-index:1}
.about-media img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--radius-sm);box-shadow:var(--shadow-md)}
.prose{grid-column:2;grid-row:2;display:grid;gap:1.4rem;max-width:40rem;color:var(--muted);padding-top:clamp(1rem,4vw,3rem)}
.prose p:first-child{font:400 clamp(1.4rem,2.6vw,2.1rem)/1.35 var(--font-display);color:var(--text);text-wrap:pretty}
:root[lang="fa"] .prose p:first-child{font-family:var(--font-body);font-weight:700;font-size:clamp(1.25rem,2.1vw,1.6rem);line-height:1.85}

/* Languages — typographic list */
.rows{margin-top:clamp(2.5rem,6vw,4.5rem);counter-reset:row;max-width:1320px;margin-inline:auto}
.rows li{counter-increment:row;display:flex;flex-wrap:wrap;align-items:baseline;gap:.6rem 1.5rem;padding-block:1.5rem;border-bottom:1px solid var(--line);transition:transform var(--t-normal) var(--ease),color var(--t-fast)}
.rows li::before{content:counter(row,decimal-leading-zero);font:400 1rem var(--font-display);color:var(--accent);min-width:2.2ch}
[dir="rtl"]{--sx:-1}
.rows li:hover{transform:translateX(calc(.6rem*var(--sx,1)))}
.rows .n{font:400 clamp(1.5rem,3.6vw,2.6rem)/1.15 var(--font-display);flex:1 1 auto;min-width:0}
:root[lang="fa"] .rows .n{font-family:var(--font-body);font-weight:700;font-size:clamp(1.3rem,2.8vw,2rem)}
.rows .m{color:var(--muted);font-size:.92rem;white-space:nowrap}
.rows a{display:flex;flex:1;flex-wrap:wrap;align-items:baseline;gap:.6rem 1.5rem;text-decoration:none;min-height:2.75rem;min-width:0}
.rows a svg{align-self:center;color:var(--accent)}
[dir="rtl"] .rows a svg{transform:scaleX(-1)}

/* Levels — vertical progression with connecting line */
.levels{margin-top:clamp(2.5rem,6vw,4.5rem);max-width:1320px;margin-inline:auto;position:relative}
.levels::before{content:"";position:absolute;inset-inline-start:1.05rem;top:.6em;bottom:.6em;width:1px;background:linear-gradient(var(--line),var(--line));z-index:-1}
:root[lang="fa"] .levels::before{inset-inline-start:unset;inset-inline-end:1.05rem}
.levels li{display:grid;grid-template-columns:2.2rem 1fr;gap:1.2rem;padding-block:1.6rem}
.levels .idx{font:400 1rem var(--font-display);color:var(--accent);font-variant-numeric:tabular-nums;align-self:start;line-height:1.9}
.levels .n{font:400 clamp(1.6rem,3.6vw,3rem)/1.2 var(--font-display)}
:root[lang="fa"] .levels .n{font-family:var(--font-body);font-weight:700;font-size:clamp(1.35rem,2.6vw,2.1rem)}
.levels p{margin-top:.5rem;max-width:42rem;color:var(--muted)}

/* Books — shelf */
.sec--shelf{padding-inline:0}
.sec--shelf .eyebrow,.sec--shelf .sec__h{padding-inline:var(--gutter)}
.shelf{display:flex;gap:clamp(1.2rem,2.5vw,2.2rem);overflow-x:auto;scroll-snap-type:x proximity;padding:clamp(2.5rem,6vw,4.5rem) var(--gutter) 1rem;scrollbar-width:thin;scrollbar-color:var(--accent-deep) transparent}
.book{flex:0 0 clamp(190px,22vw,280px);scroll-snap-align:start;display:grid;gap:.9rem;align-content:start}
.book__cover{aspect-ratio:3/4;border-radius:var(--radius-sm);overflow:hidden;background:var(--surface);box-shadow:var(--shadow-md);transition:transform var(--t-normal) var(--ease)}
.book:hover .book__cover{transform:translateY(-.4rem) rotate(-.6deg)}
.book__cover img{width:100%;height:100%;object-fit:cover;transition:transform var(--t-slow) var(--ease)}
.book:hover .book__cover img{transform:scale(1.04)}
.book__ph{height:100%;display:grid;place-items:end start;padding:1.2rem;background:linear-gradient(160deg,var(--accent-deep),var(--surface));font:400 1.4rem/1.15 var(--font-display);color:var(--on-accent)}
.book h3{font:400 1.4rem/1.2 var(--font-display)}
:root[lang="fa"] .book h3{font-family:var(--font-body);font-weight:700;font-size:1.1rem}
.book .m{font-size:.84rem;color:var(--accent)}
.book p{font-size:.9rem;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* Certificates — asymmetric archive grid */
.certs{margin-top:clamp(2.5rem,6vw,4.5rem);display:grid;grid-template-columns:repeat(6,1fr);gap:clamp(1rem,2.5vw,1.8rem);max-width:1320px;margin-inline:auto}
.cert{display:grid;gap:.8rem;text-align:start;width:100%;grid-column:span 3}
.cert:nth-child(6n+1){grid-column:span 4}.cert:nth-child(6n+2){grid-column:span 2}
.cert:nth-child(6n+4){grid-column:span 2}.cert:nth-child(6n+5){grid-column:span 4}
.cert__img{aspect-ratio:4/3;background:var(--surface);border-radius:var(--radius-sm);overflow:hidden}
.cert__img img{width:100%;height:100%;object-fit:cover;transition:transform var(--t-slow) var(--ease)}
button.cert:hover .cert__img img{transform:scale(1.04)}
.cert h3{font:400 1.35rem/1.2 var(--font-display)}
:root[lang="fa"] .cert h3{font-family:var(--font-body);font-weight:700;font-size:1.05rem}
.cert .m{color:var(--muted);font-size:.88rem}
.lightbox{max-width:min(92vw,1000px);padding:1rem;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);color:var(--text)}
.lightbox::backdrop{background:rgba(0,0,0,.82)}
.lightbox img{max-height:76vh;width:auto;max-width:100%;margin-inline:auto}.lightbox p{padding-top:.8rem;text-align:center;color:var(--muted)}
.lightbox__x{position:absolute;inset-block-start:1.25rem;inset-inline-end:1.25rem;background:var(--glass)}

/* Contact — final scene */
.sec--contact{padding-top:calc(var(--space-xl) * 1.1)}
.sec--contact h2{font:400 clamp(2.4rem,7.5vw,6.4rem)/1.05 var(--font-display);max-width:16ch}
:root[lang="fa"] .sec--contact h2{font-weight:800;line-height:1.3}
.rows--links{margin-top:clamp(2.5rem,6vw,4rem)}
.rows--links .n{font-size:clamp(1.4rem,2.8vw,2.1rem)}

.foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:1rem 2rem;padding:2.2rem var(--gutter) 2.6rem;color:var(--muted);font-size:.86rem}
.foot b{color:var(--text);font-weight:500}

/* Motion */
.js .rv{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .rv.in{opacity:1;transform:none}
@keyframes rise{from{opacity:0;transform:translateY(22px)}}
@keyframes media-in{from{opacity:0;transform:scale(1.04)}}
@keyframes shimmer{to{background-position:-200% 0}}
@keyframes nudge{50%{transform:translateY(5px)}}

/* ===== Responsive — mobile designed independently, never a shrunk desktop ===== */
@media (max-width:1100px){
  .nav__links{gap:1.1rem;font-size:.85rem}.brand__name{display:none}
  .about-grid{grid-template-columns:1fr}
  .about-word{margin-bottom:1.5rem}
  .about-media{grid-row:2;grid-column:1;max-width:20rem}
  .prose{grid-row:3;grid-column:1;padding-top:2rem}
  .certs{grid-template-columns:repeat(2,1fr)}
  .cert,.cert:nth-child(6n+1),.cert:nth-child(6n+2),.cert:nth-child(6n+4),.cert:nth-child(6n+5){grid-column:span 1}
}
@media (max-width:860px){
  .menu-btn{display:grid}
  .nav-overlay{display:block}
  body.nav-open .nav__links{opacity:1;visibility:visible}
  .nav__links{position:fixed;inset:0;z-index:58;flex-direction:column;justify-content:center;align-items:flex-start;gap:.3rem;padding:6rem var(--gutter);font:400 2.6rem/1.2 var(--font-display);opacity:0;visibility:hidden;transition:opacity var(--t-normal),visibility var(--t-normal)}
  :root[lang="fa"] .nav__links{font-family:var(--font-body);font-weight:700;font-size:2rem}
  .nav__links a{min-height:3.5rem;color:var(--text);display:flex;align-items:center}
  .hero{min-height:100svh;align-items:end}
  .hero__media{inset-inline:0;width:100%;height:56svh;mask-image:none}
  .hero__media img{-webkit-mask-image:linear-gradient(to bottom,#000 42%,transparent);mask-image:linear-gradient(to bottom,#000 42%,transparent);object-position:50% 10%}
  .hero__media.has-img::before{display:none}
  .hero__body{padding-block:0 4.5rem;padding-top:40svh}
  .hero__scroll{display:none}
  .sec{padding-inline:var(--gutter)}
  .shelf{padding-inline:var(--gutter)}
  .sec--shelf .eyebrow,.sec--shelf .sec__h{padding-inline:0}
  .levels li{grid-template-columns:1.7rem 1fr;gap:.9rem}
  .levels::before{inset-inline-start:.8rem}
  :root[lang="fa"] .levels::before{inset-inline-end:.8rem}
}
@media (max-width:480px){
  .hero__cta{column-gap:1.4rem}
  .nav__tools{gap:.2rem}
  .about-word{font-size:clamp(3rem,16vw,5rem)}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important}
  .js .rv{opacity:1;transform:none}
}