/* =========================================================
   Zahra Sahranavard — personal site
   Palette derived from the whale mark (steel ocean blue)
   ========================================================= */
/* Ahang — Persian typeface. unicode-range limits it to Arabic-script text,
   so Latin words/numbers inside Persian copy keep using Inter. */
@font-face{font-family:'Ahang';font-weight:300;font-style:normal;font-display:swap;src:url('assets/fonts/Ahang-Light.woff2') format('woff2');unicode-range:U+0600-06FF,U+0750-077F,U+FB50-FDFF,U+FE70-FEFF,U+200C-200F,U+060C,U+061B,U+061F;}
@font-face{font-family:'Ahang';font-weight:400;font-style:normal;font-display:swap;src:url('assets/fonts/Ahang-Regular.woff2') format('woff2');unicode-range:U+0600-06FF,U+0750-077F,U+FB50-FDFF,U+FE70-FEFF,U+200C-200F,U+060C,U+061B,U+061F;}
@font-face{font-family:'Ahang';font-weight:500;font-style:normal;font-display:swap;src:url('assets/fonts/Ahang-Medium.woff2') format('woff2');unicode-range:U+0600-06FF,U+0750-077F,U+FB50-FDFF,U+FE70-FEFF,U+200C-200F,U+060C,U+061B,U+061F;}
@font-face{font-family:'Ahang';font-weight:600;font-style:normal;font-display:swap;src:url('assets/fonts/Ahang-DemiBold.woff2') format('woff2');unicode-range:U+0600-06FF,U+0750-077F,U+FB50-FDFF,U+FE70-FEFF,U+200C-200F,U+060C,U+061B,U+061F;}
@font-face{font-family:'Ahang';font-weight:700;font-style:normal;font-display:swap;src:url('assets/fonts/Ahang-Bold.woff2') format('woff2');unicode-range:U+0600-06FF,U+0750-077F,U+FB50-FDFF,U+FE70-FEFF,U+200C-200F,U+060C,U+061B,U+061F;}

:root{
  --bg:#070c14;
  --bg-2:#0a111c;
  --surface:rgba(255,255,255,0.028);
  --surface-2:rgba(255,255,255,0.05);
  --border:rgba(255,255,255,0.075);
  --border-strong:rgba(255,255,255,0.14);

  --ink:#eef3fa;
  --ink-soft:#b9c4d6;
  --ink-dim:#79879e;

  --blue:#3d7aa8;          /* the logo blue */
  --blue-lift:#5ea3d8;
  --blue-glow:94,163,216;
  --violet:#9b87f5;
  --violet-glow:155,135,245;
  --pink:#f08ac0;
  --pink-glow:240,138,192;

  --card-bg:rgba(10,16,27,.66);
  --tl-bg:rgba(10,16,27,.7);
  --header-bg:rgba(9,24,46,.55);
  --header-bg-s:rgba(8,18,34,.86);
  --nav-solid:rgba(8,16,30,.97);
  --panel-bg:rgba(10,17,28,.88);
  --field-bg:rgba(255,255,255,.03);
  --placeholder:#5b6a86;
  --copy:#5d6b85;
  --ic1:#6fb0e6;--ic2:#9b87f5;--ic3:#f08ac0;
  --ray:150,200,255;--ray-a:.1;
  --whale-op:.6;
  --wb1:#16305c;
  --glow-op:.13;
  --depth-gradient:linear-gradient(180deg,#10345a 0%,#0c2542 10%,#0a1a35 28%,#0a1430 50%,#0d0f2c 72%,#140c2b 90%,#190c2a 100%);

  --radius:18px;
  --radius-s:12px;
  --maxw:1180px;

  --font-display:'Outfit',sans-serif;
  --font-body:'Inter',sans-serif;
  --ease:cubic-bezier(.22,.8,.3,1);
}

:root[data-theme="light"]{
  --bg:#d9eafa;
  --bg-2:#e8f1fa;
  --surface:rgba(255,255,255,.5);
  --surface-2:rgba(255,255,255,.78);
  --border:rgba(15,30,60,.1);
  --border-strong:rgba(15,30,60,.2);
  --ink:#0e1c30;
  --ink-soft:#33465f;
  --ink-dim:#566a85;
  --blue:#2e6da4;
  --blue-lift:#2b67a0;
  --blue-glow:46,109,164;
  --violet:#6a54d6;
  --violet-glow:106,84,214;
  --pink:#c93f8a;
  --pink-glow:201,63,138;
  --card-bg:rgba(255,255,255,.58);
  --tl-bg:rgba(255,255,255,.64);
  --header-bg:rgba(226,240,252,.6);
  --header-bg-s:rgba(226,240,252,.9);
  --nav-solid:rgba(226,240,252,.98);
  --panel-bg:rgba(255,255,255,.88);
  --field-bg:rgba(255,255,255,.6);
  --placeholder:#8496b0;
  --copy:#6b7c96;
  --ic1:#2b67a0;--ic2:#6a54d6;--ic3:#c93f8a;
  --ray:255,255,255;--ray-a:.6;
  --whale-op:.62;
  --wb1:#cfdcf6;
  --glow-op:.22;
  --depth-gradient:linear-gradient(180deg,#e9f5fe 0%,#d9eafa 14%,#cde0f6 36%,#d5d8f5 60%,#e2d6f1 82%,#efd7e9 100%);
}

html[lang="fa"]{
  --font-display:'Ahang','Outfit',sans-serif;
  --font-body:'Ahang','Inter',sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;overflow-x:clip;background:var(--bg);}
body{
  margin:0;
  background:var(--depth-gradient);
  background-color:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-display);margin:0;letter-spacing:-0.02em;font-weight:500;}
html[lang="fa"] h1,html[lang="fa"] h2,html[lang="fa"] h3{letter-spacing:0;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
p{margin:0 0 18px;}
ol,ul{margin:0;padding:0;list-style:none;}
::selection{background:rgba(var(--blue-glow),.35);color:#fff;}
:focus-visible{outline:2px solid var(--blue-lift);outline-offset:3px;border-radius:4px;}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;position:relative;z-index:2;}

.skip{
  position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);
  white-space:nowrap;z-index:200;background:var(--blue);color:#fff;border-radius:999px;
}
.skip:focus{
  width:auto;height:auto;overflow:visible;clip:auto;clip-path:none;
  top:12px;inset-inline-start:20px;padding:10px 18px;
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}

/* ---------- ambient background layers ---------- */
.grain{
  position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.035;
  background-image:radial-gradient(var(--ink) .6px,transparent .6px);
  background-size:28px 28px;
}

/* soft coloured halos placed behind some sections */
section{overflow-x:clip;}
.glow{
  position:absolute;width:560px;height:560px;border-radius:50%;
  background:rgb(var(--c));opacity:var(--glow-op);filter:blur(130px);
  pointer-events:none;z-index:0;
  animation:glow-float 24s ease-in-out infinite;
}
.g-violet{--c:155,135,245;}
.g-pink{--c:240,138,192;}
.g-blue{--c:94,163,216;}
.glow.alt{animation-duration:31s;animation-direction:reverse;}
@keyframes glow-float{50%{transform:translate(50px,40px) scale(1.1);}}
@media (max-width:760px){.glow{width:360px;height:360px;opacity:.12;filter:blur(90px);}}
.aurora{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;contain:paint;clip-path:inset(0);}
.aurora span{position:absolute;border-radius:50%;filter:blur(130px);}
.aurora .a1{width:620px;height:620px;background:var(--blue);opacity:.17;top:-240px;inset-inline-start:-180px;animation:drift1 26s ease-in-out infinite;}
.aurora .a2{width:520px;height:520px;background:var(--violet);opacity:.11;top:48%;inset-inline-end:-220px;animation:drift2 32s ease-in-out infinite;}
.aurora .a3{width:560px;height:560px;background:var(--pink);opacity:.06;bottom:-200px;inset-inline-start:22%;animation:drift3 38s ease-in-out infinite;}
@keyframes drift1{50%{transform:translate(90px,70px) scale(1.12);}}
@keyframes drift2{50%{transform:translate(-80px,-60px) scale(1.08);}}
@keyframes drift3{50%{transform:translate(60px,-80px) scale(1.1);}}

/* slow-moving current lines, the "ocean" motion layer */
.currents{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none;opacity:.55;}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:60;
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  background:var(--header-bg);
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
header.scrolled{background:var(--header-bg-s);border-bottom-color:var(--border);}
nav.wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:74px;}

.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{
  width:36px;height:36px;display:grid;place-items:center;flex:0 0 auto;
  border-radius:11px;background:rgba(var(--blue-glow),.09);border:1px solid rgba(var(--blue-glow),.18);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.brand-mark img{height:24px;width:auto;}
.brand:hover .brand-mark{transform:translateY(-2px);box-shadow:0 8px 22px -10px rgba(var(--blue-glow),.8);}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-family:var(--font-display);font-size:15px;font-weight:600;letter-spacing:-.01em;}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--ink-dim);letter-spacing:.06em;text-transform:uppercase;}
html[lang="fa"] .brand-text em{letter-spacing:0;}

.nav-links{display:flex;gap:30px;align-items:center;}
.nav-links a{font-size:14px;color:var(--ink-dim);position:relative;padding:6px 0;transition:color .25s var(--ease);}
.nav-links a::after{
  content:"";position:absolute;inset-inline:0;bottom:0;height:1.5px;border-radius:2px;
  background:linear-gradient(90deg,var(--blue-lift),var(--pink));
  transform:scaleX(0);transform-origin:center;transition:transform .35s var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a.active{color:var(--ink);}
.nav-links a.active::after{transform:scaleX(1);}

.nav-right{display:flex;align-items:center;gap:14px;}
.lang-switch{
  display:flex;align-items:center;gap:2px;padding:3px;
  border:1px solid var(--border);border-radius:999px;background:var(--surface);
}
.lang-switch button{
  border:none;background:transparent;color:var(--ink-dim);cursor:pointer;
  font-family:var(--font-body);font-size:12.5px;font-weight:600;
  padding:5px 13px;border-radius:999px;transition:all .25s var(--ease);
}
.lang-switch button.active{background:rgba(var(--blue-glow),.16);color:var(--ink);box-shadow:inset 0 0 0 1px rgba(var(--blue-glow),.28);}
.lang-switch button:hover{color:var(--ink);}

.menu-btn{
  display:none;width:40px;height:40px;border:1px solid var(--border);border-radius:11px;
  background:var(--surface);cursor:pointer;position:relative;
}
.menu-btn span{
  position:absolute;inset-inline:11px;height:1.5px;background:var(--ink);border-radius:2px;
  transition:transform .3s var(--ease),opacity .3s var(--ease);
}
.menu-btn span:nth-child(1){top:15px;}
.menu-btn span:nth-child(2){top:22px;}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(3.5px) rotate(45deg);}
.menu-btn[aria-expanded="true"] span:nth-child(2){transform:translateY(-3.5px) rotate(-45deg);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:14px 26px;border-radius:999px;font-size:14.5px;font-weight:600;
  font-family:var(--font-body);cursor:pointer;border:1px solid transparent;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease),border-color .3s var(--ease);
}
.btn svg{width:16px;height:16px;transition:transform .3s var(--ease);}
[dir="rtl"] .btn svg{transform:scaleX(-1);}
.btn-primary{
  background:linear-gradient(135deg,var(--blue-lift),var(--blue));
  color:#fff;box-shadow:0 14px 34px -16px rgba(var(--blue-glow),.9);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -14px rgba(var(--blue-glow),1);}
.btn-primary:hover svg{transform:translateX(4px);}
[dir="rtl"] .btn-primary:hover svg{transform:scaleX(-1) translateX(4px);}
.btn-ghost{border-color:var(--border-strong);color:var(--ink);background:transparent;}
.btn-ghost:hover{background:var(--surface-2);border-color:rgba(var(--blue-glow),.5);transform:translateY(-2px);}

/* ---------- hero ---------- */
.hero{position:relative;padding:86px 0 140px;overflow:hidden;}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;}

@keyframes whale-float{50%{transform:translateY(-26px) rotate(-2deg);}}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;font-size:13px;color:var(--ink-soft);
  padding:7px 16px;border:1px solid var(--border);border-radius:999px;background:var(--surface);
  margin-bottom:26px;
}
.eyebrow .dot{
  width:7px;height:7px;border-radius:50%;background:var(--violet);flex:0 0 auto;
  box-shadow:0 0 0 0 rgba(155,135,245,.6);animation:ping 2.6s ease-out infinite;
}
@keyframes ping{
  0%{box-shadow:0 0 0 0 rgba(155,135,245,.55);}
  70%{box-shadow:0 0 0 9px rgba(155,135,245,0);}
  100%{box-shadow:0 0 0 0 rgba(155,135,245,0);}
}

.hero h1{display:flex;flex-direction:column;font-size:clamp(44px,6.6vw,82px);font-weight:300;line-height:1.05;}
html[lang="fa"] .hero h1{flex-direction:row;flex-wrap:wrap;column-gap:.28em;align-items:baseline;}
html[lang="fa"] .hero h1 .l1{line-height:1.3;}
html[lang="fa"] .hero h1 .l2{line-height:1.3;padding-bottom:.3em;margin-bottom:-.2em;}
.hero h1 .l1{color:var(--ink);font-weight:600;}
.hero h1 .l2{
  font-weight:600;padding:.04em 0 .2em;margin-bottom:-.12em;line-height:1.12;
  background:linear-gradient(100deg,var(--blue-lift) 0%,var(--violet) 50%,var(--pink) 100%);
  background-size:200% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:shimmer 9s ease-in-out infinite;
}
@keyframes shimmer{50%{background-position:100% 0;}}

.hero .role{
  margin-top:18px;font-size:18px;color:var(--ink-soft);font-weight:500;
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
}
.hero .role .sep{width:5px;height:5px;border-radius:50%;background:var(--pink);box-shadow:0 0 12px rgba(var(--pink-glow),.9);}
.hero .tagline{margin-top:22px;max-width:50ch;color:var(--ink-dim);font-size:16px;}
.hero .cta-row{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;}

.hero-stats{
  display:flex;gap:38px;margin-top:48px;padding-top:28px;border-top:1px solid var(--border);flex-wrap:wrap;
}
.hero-stats div{display:flex;flex-direction:column;gap:2px;}
.hero-stats strong{font-family:var(--font-display);font-size:28px;font-weight:300;color:var(--ink);line-height:1.1;}
[dir="rtl"] .hero-stats strong{direction:ltr;text-align:right;}
.hero-stats span{font-size:12.5px;color:var(--ink-dim);}

/* portrait */
.portrait-wrap{position:relative;width:100%;max-width:380px;aspect-ratio:1/1;margin-inline:auto;}
.portrait-wrap canvas{position:absolute;inset:-30%;width:160%;height:160%;z-index:0;}
.orbit{
  position:absolute;inset:-7%;border-radius:50%;
  border:1px dashed rgba(var(--blue-glow),.22);
  animation:spin 46s linear infinite;z-index:1;
}
.orbit::after{
  content:"";position:absolute;top:-4px;left:50%;width:7px;height:7px;border-radius:50%;
  background:var(--violet);box-shadow:0 0 14px var(--violet);
}
.orbit-2{inset:-15%;border-style:solid;border-color:rgba(var(--pink-glow),.14);animation-duration:70s;animation-direction:reverse;}
.orbit-2::after{background:var(--pink);box-shadow:0 0 14px rgba(var(--pink-glow),.9);width:5px;height:5px;}
@keyframes spin{to{transform:rotate(360deg);}}

.portrait-frame{
  position:relative;z-index:2;width:100%;height:100%;border-radius:50% 50% 50% 50% / 50% 50% 50% 50%;
  padding:6px;
  background:linear-gradient(150deg,rgba(var(--blue-glow),.55),rgba(255,255,255,.05) 45%,rgba(var(--pink-glow),.4));
  box-shadow:0 30px 70px -30px rgba(0,0,0,.9);
}
.portrait-clip{
  width:100%;height:100%;border-radius:inherit;overflow:hidden;background:var(--bg-2);
}
.portrait-clip img{
  width:100%;height:100%;object-fit:cover;object-position:50% 22%;
  filter:saturate(1.02) contrast(1.03);
  transition:transform 1s var(--ease);
}
.portrait-wrap:hover .portrait-clip img{transform:scale(1.045);}

.portrait-badge{
  position:absolute;z-index:3;inset-inline-start:-6px;top:12%;
  width:56px;height:56px;border-radius:18px;display:grid;place-items:center;
  background:var(--panel-bg);border:1px solid rgba(var(--blue-glow),.3);
  backdrop-filter:blur(8px);box-shadow:0 14px 34px -16px rgba(0,0,0,.9);
  animation:bob 7s ease-in-out infinite;
}
.portrait-badge img{height:32px;width:auto;}
@keyframes bob{50%{transform:translateY(-9px);}}



/* ---------- sections ---------- */
section{padding:104px 0;position:relative;}

.section-head{margin-bottom:56px;max-width:660px;}
.kicker{display:flex;align-items:center;gap:12px;color:var(--blue-lift);font-size:12.5px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;}
html[lang="fa"] .kicker{letter-spacing:0;}
.kicker .kline{width:30px;height:1px;background:linear-gradient(90deg,var(--blue-lift),transparent);}
[dir="rtl"] .kicker .kline{background:linear-gradient(270deg,var(--blue-lift),transparent);}
.section-head h2{font-size:clamp(28px,3.6vw,44px);margin-top:14px;font-weight:300;line-height:1.15;}
.section-head p{color:var(--ink-dim);margin-top:16px;font-size:15.5px;}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:start;}
.about-copy p{color:var(--ink-soft);font-size:16px;}
.about-copy .lead{font-size:18.5px;color:var(--ink);line-height:1.6;}
.about-sig{
  display:flex;align-items:center;gap:14px;margin-top:34px;padding-top:26px;border-top:1px solid var(--border);
  color:var(--ink-dim);font-size:14px;font-style:italic;
}
html[lang="fa"] .about-sig{font-style:normal;}
.about-sig img{height:34px;width:auto;opacity:.85;}

.info-rail{display:flex;flex-direction:column;}
.info-row{
  display:grid;grid-template-columns:120px 1fr;gap:20px;padding:20px 2px;
  border-top:1px solid var(--border);transition:background .3s var(--ease),padding-inline .3s var(--ease);
}
.info-row:last-child{border-bottom:1px solid var(--border);}
.info-row:hover{background:rgba(var(--blue-glow),.04);}
.info-row .label{color:var(--ink-dim);font-size:13px;padding-top:2px;}
.info-row .value{font-size:15.5px;font-weight:500;display:flex;flex-direction:column;}
.info-row .value .sub{color:var(--ink-dim);font-weight:400;font-size:13.5px;margin-top:3px;}
.info-row a:hover{color:var(--blue-lift);}

/* ---------- timeline ---------- */
.timeline{position:relative;padding-inline-start:34px;}
.timeline::before{
  content:"";position:absolute;inset-inline-start:7px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,transparent,rgba(var(--blue-glow),.45) 12%,rgba(var(--pink-glow),.3) 88%,transparent);
}
.tl-item{position:relative;padding-bottom:22px;}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{
  position:absolute;inset-inline-start:-34px;top:28px;width:15px;height:15px;border-radius:50%;
  background:var(--bg);border:1px solid rgba(var(--blue-glow),.5);display:block;
}
.tl-dot::after{
  content:"";position:absolute;inset:4px;border-radius:50%;background:var(--blue-lift);
  box-shadow:0 0 12px rgba(var(--blue-glow),.9);
}
.tl-item:nth-child(even) .tl-dot{border-color:rgba(var(--pink-glow),.45);}
.tl-item:nth-child(even) .tl-dot::after{background:var(--pink);box-shadow:0 0 12px rgba(var(--pink-glow),.8);}

.tl-card{
  background:var(--tl-bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 28px;position:relative;overflow:hidden;
  transition:transform .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease);
}
.tl-card::before{
  content:"";position:absolute;inset-inline-start:0;top:0;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--blue-lift),transparent);
  opacity:0;transition:opacity .35s var(--ease);
}
.tl-card:hover{transform:translateY(-3px);border-color:rgba(var(--blue-glow),.35);background:var(--surface-2);}
.tl-card:hover::before{opacity:1;}
.tl-top{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.tl-top h3{font-size:19.5px;font-weight:600;}
.tl-year{
  font-family:var(--font-display);font-size:13px;color:var(--pink);font-weight:500;
  padding:3px 12px;border-radius:999px;background:rgba(var(--pink-glow),.1);border:1px solid rgba(var(--pink-glow),.2);
  flex:0 0 auto;
}
.tl-org{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-top:7px;color:var(--blue-lift);font-size:14px;}
.tl-org .tl-sep{color:var(--ink-dim);}
.tl-org span:not(.tl-sep):last-child{color:var(--ink-dim);}
.tl-card p{margin:14px 0 0;color:var(--ink-dim);font-size:14.5px;}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.tl-tags span{
  font-size:11.5px;color:var(--ink-soft);padding:4px 11px;border-radius:7px;
  background:var(--surface);border:1px solid var(--border);
}
.tl-link{
  display:inline-flex;align-items:center;gap:7px;margin-top:16px;font-size:13.5px;
  font-weight:600;color:var(--ink);
}
.tl-link svg{width:13px;height:13px;transition:transform .3s var(--ease);}
[dir="rtl"] .tl-link svg{transform:scaleX(-1);}
.tl-link:hover{color:var(--blue-lift);}
.tl-link:hover svg{transform:translate(3px,-3px);}
[dir="rtl"] .tl-link:hover svg{transform:scaleX(-1) translate(3px,-3px);}

/* ---------- skills ---------- */
.skills-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px 54px;}
.skill-group h4{
  font-family:var(--font-body);font-size:12.5px;color:var(--blue-lift);font-weight:600;
  margin-bottom:16px;letter-spacing:.08em;text-transform:uppercase;
}
html[lang="fa"] .skill-group h4{letter-spacing:0;}
.chip-row{display:flex;flex-wrap:wrap;gap:9px;}
.chip{
  display:inline-flex;align-items:center;gap:9px;padding:8px 16px 8px 12px;border-radius:999px;
  background:var(--surface);border:1px solid var(--border);font-size:13.5px;color:var(--ink-soft);
  transition:all .3s var(--ease);
}
.chip:hover{
  border-color:rgba(var(--blue-glow),.5);color:var(--ink);transform:translateY(-2px);
  box-shadow:0 10px 24px -14px rgba(var(--blue-glow),1);background:rgba(var(--blue-glow),.07);
}
.skill-group:nth-child(even) .chip:hover{
  border-color:rgba(var(--pink-glow),.45);background:rgba(var(--pink-glow),.06);
  box-shadow:0 10px 24px -14px rgba(var(--pink-glow),.9);
}

.chip{direction:ltr;unicode-bidi:isolate;}
.tl-tags span,.tl-org span{unicode-bidi:isolate;}
.chip .ic{width:17px;height:17px;flex:0 0 auto;transition:transform .35s var(--ease);}
.chip:hover .ic{transform:scale(1.18) rotate(-6deg);}
.skill-group h4{display:flex;align-items:center;gap:11px;}
.h-ic{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;flex:0 0 auto;
  background:linear-gradient(145deg,rgba(var(--blue-glow),.16),rgba(var(--pink-glow),.1));
  border:1px solid rgba(var(--blue-glow),.22);
}
.h-ic .ic{width:18px;height:18px;}

/* ---------- projects ---------- */
.bento{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.card{
  grid-column:span 2;background:var(--card-bg);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px;position:relative;overflow:hidden;min-height:196px;
  display:flex;flex-direction:column;justify-content:space-between;gap:16px;
  transition:transform .35s var(--ease),border-color .35s var(--ease);
}
.card.tall{grid-row:span 2;min-height:372px;}
.card.wide{grid-column:span 4;min-height:auto;}
.card::before{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .4s var(--ease);pointer-events:none;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),rgba(var(--blue-glow),.13),transparent 62%);
}
.card:hover::before{opacity:1;}
.card:hover{transform:translateY(-4px);border-color:rgba(var(--blue-glow),.4);}
.card .tag{
  align-self:flex-start;font-size:11.5px;color:var(--blue-lift);font-weight:600;
  background:rgba(var(--blue-glow),.1);padding:5px 13px;border-radius:999px;
  border:1px solid rgba(var(--blue-glow),.18);
}
.card:nth-child(even) .tag{color:var(--pink);background:rgba(var(--pink-glow),.1);border-color:rgba(var(--pink-glow),.2);}
.card:nth-child(3n) .tag{color:var(--violet);background:rgba(var(--violet-glow),.1);border-color:rgba(var(--violet-glow),.22);}
.card:nth-child(even)::before{background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),rgba(var(--pink-glow),.1),transparent 62%);}
.card:nth-child(even):hover{border-color:rgba(var(--pink-glow),.35);}
.card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;position:relative;z-index:1;}
.card-ic{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;flex:0 0 auto;
  background:linear-gradient(145deg,rgba(var(--blue-glow),.18),rgba(var(--pink-glow),.12));
  border:1px solid rgba(var(--blue-glow),.25);
  box-shadow:0 10px 26px -14px rgba(var(--violet-glow),.9);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.card-ic .ic{width:24px;height:24px;}
.card:hover .card-ic{transform:translateY(-3px) rotate(-5deg);box-shadow:0 14px 30px -12px rgba(var(--pink-glow),.9);}
.card-wm{
  position:absolute;inset-inline-end:-22px;bottom:-26px;width:170px;height:170px;opacity:.07;pointer-events:none;
  transition:opacity .5s var(--ease),transform .8s var(--ease);
}
.card.tall .card-wm{width:300px;height:300px;inset-inline-end:-40px;bottom:auto;top:56px;opacity:.085;}
.card.wide .card-wm{width:190px;height:190px;bottom:-40px;}
.card:hover .card-wm{opacity:.14;transform:rotate(-6deg) scale(1.06);}
.card-body{margin-top:auto;position:relative;z-index:1;}
.card .link{position:relative;z-index:1;}
.card h3{font-size:20px;font-weight:600;line-height:1.3;}
.card p{font-size:14px;color:var(--ink-dim);margin:10px 0 0;}
.card .link{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;font-weight:600;color:var(--ink);}
.card .link svg{width:13px;height:13px;transition:transform .3s var(--ease);}
[dir="rtl"] .card .link svg{transform:scaleX(-1);}
.card:hover .link svg{transform:translate(3px,-3px);}
[dir="rtl"] .card:hover .link svg{transform:scaleX(-1) translate(3px,-3px);}

.github-card{
  align-items:center;justify-content:center;text-align:center;gap:18px;
  background:linear-gradient(150deg,rgba(var(--blue-glow),.1),rgba(255,255,255,.02));
}
.gh-logo{height:54px;width:auto;opacity:.9;animation:bob 8s ease-in-out infinite;}
.github-card h3{font-size:18px;}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:start;}
.field{margin-bottom:24px;}
.field label{display:block;font-size:12.5px;color:var(--ink-dim);margin-bottom:8px;}
.field input,.field textarea{
  width:100%;background:var(--field-bg);border:1px solid var(--border);border-radius:var(--radius-s);
  color:var(--ink);font-size:15px;font-family:var(--font-body);padding:13px 16px;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease);
}
.field textarea{resize:vertical;min-height:130px;}
.field input:focus,.field textarea:focus{
  outline:none;border-color:rgba(var(--blue-glow),.6);background:rgba(var(--blue-glow),.05);
  box-shadow:0 0 0 4px rgba(var(--blue-glow),.09);
}
.field input::placeholder,.field textarea::placeholder{color:var(--placeholder);}

.contact-side{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:34px;position:relative;overflow:hidden;
}
.side-whale{
  position:absolute;inset-inline-end:-30px;bottom:-30px;height:78%;width:auto;opacity:.035;
  animation:whale-float 18s ease-in-out infinite;
}
.contact-side .content{position:relative;z-index:1;}
.contact-side .row{
  display:flex;align-items:center;gap:13px;margin-bottom:16px;font-size:14px;color:var(--ink-soft);
  transition:color .25s var(--ease);
}
a.row:hover{color:var(--ink);}
a.row:hover .ic{border-color:rgba(var(--blue-glow),.5);color:var(--blue-lift);}
.contact-side .ic{
  width:38px;height:38px;border-radius:11px;background:var(--surface);
  display:grid;place-items:center;flex:0 0 auto;border:1px solid var(--border);color:var(--ink-dim);
  transition:all .25s var(--ease);
}
.contact-side .ic svg{width:17px;height:17px;}

.social-row{display:flex;gap:10px;margin-top:26px;padding-top:24px;border-top:1px solid var(--border);}
.social-row a{
  width:40px;height:40px;border-radius:12px;background:var(--surface);border:1px solid var(--border);
  display:grid;place-items:center;color:var(--ink-dim);transition:all .3s var(--ease);
}
.social-row a svg{width:17px;height:17px;}
.social-row a:hover{
  transform:translateY(-3px);color:var(--ink);border-color:rgba(var(--blue-glow),.5);
  box-shadow:0 12px 26px -14px rgba(var(--blue-glow),1);
}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--border);padding:44px 0;background:transparent;position:relative;z-index:2;}
footer .wrap{display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;}
.foot-brand{display:flex;align-items:center;gap:13px;}
.foot-brand img{height:38px;width:auto;opacity:.9;}
.foot-brand div{display:flex;flex-direction:column;line-height:1.3;}
.foot-brand strong{font-family:var(--font-display);font-size:14.5px;font-weight:600;}
.foot-brand span{font-size:12px;color:var(--ink-dim);}
.foot-links{display:flex;gap:24px;font-size:13.5px;color:var(--ink-dim);}
.foot-links a:hover{color:var(--ink);}
footer .copy{font-size:12px;color:var(--copy);}

#toTop{
  position:fixed;inset-inline-end:24px;bottom:24px;z-index:70;
  width:44px;height:44px;border-radius:13px;cursor:pointer;
  background:var(--panel-bg);backdrop-filter:blur(10px);
  border:1px solid var(--border-strong);color:var(--ink);
  display:grid;place-items:center;
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:all .35s var(--ease);
}
#toTop svg{width:18px;height:18px;}
#toTop.show{opacity:1;transform:none;pointer-events:auto;}
#toTop:hover{border-color:rgba(var(--blue-glow),.5);box-shadow:0 12px 28px -14px rgba(var(--blue-glow),1);}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .hero .wrap{grid-template-columns:1fr;gap:54px;}
  .portrait-wrap{order:-1;max-width:290px;}
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:44px;}
  .skills-grid{grid-template-columns:1fr;gap:30px;}
  .hero{padding:56px 0 130px;}
}
@media (max-width:860px){
  .nav-links{
    position:fixed;inset:74px 0 auto;flex-direction:column;gap:0;
    background:var(--nav-solid);backdrop-filter:blur(18px);
    border-bottom:1px solid var(--border);padding:12px 28px 24px;
    transform:translateY(-16px);opacity:0;visibility:hidden;
    transition:transform .4s var(--ease),opacity .3s var(--ease),visibility .3s;
    align-items:stretch;
  }
  .nav-links.open{transform:none;opacity:1;visibility:visible;}
  .nav-links a{padding:14px 0;border-bottom:1px solid var(--border);font-size:15px;}
  .nav-links a::after{display:none;}
  .menu-btn{display:block;}
  .brand-text em{display:none;}
}
@media (max-width:860px){
  .lang-switch button{padding:8px 15px;min-height:34px;}
  .card .link,.tl-link{padding:10px 0;}
}
@media (max-width:760px){
  .bento{grid-template-columns:repeat(2,1fr);}
  .card,.card.wide,.card.tall{grid-column:span 2;grid-row:auto;min-height:auto;}
  section{padding:76px 0;}
  .wrap{padding:0 20px;}
  .info-row{grid-template-columns:1fr;gap:4px;}
  .hero-stats{gap:26px;}
  footer .wrap{flex-direction:column;text-align:center;}
}

/* =========================================================
   Ocean depth — the whole page is a dive: surface light at the
   top, deeper colour as you scroll, a whale swimming along.
   Everything here is background-only and kept low-contrast.
   ========================================================= */

/* light rays from the water surface (top of the document only) */
.rays{
  position:absolute;top:0;left:0;right:0;height:min(105vh,920px);overflow:hidden;
  pointer-events:none;z-index:0;direction:ltr;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.55) 48%,transparent 100%);
  mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.55) 48%,transparent 100%);
}
.rays i{
  position:absolute;top:-12%;height:135%;
  background:linear-gradient(180deg,rgba(var(--ray),var(--ray-a)),rgba(var(--ray),0) 88%);
  filter:blur(26px);transform-origin:50% 0;
  animation:ray-sway 16s ease-in-out infinite;
}
.rays i:nth-child(1){left:4%;width:15vw;transform:skewX(-20deg);}
.rays i:nth-child(2){left:27%;width:9vw;transform:skewX(-14deg);animation-duration:21s;animation-delay:-6s;}
.rays i:nth-child(3){left:50%;width:17vw;transform:skewX(-18deg);animation-duration:18s;animation-delay:-3s;}
.rays i:nth-child(4){left:76%;width:11vw;transform:skewX(-12deg);animation-duration:24s;animation-delay:-11s;}
@keyframes ray-sway{0%,100%{opacity:.85;}50%{opacity:.3;}}

/* the swimming whale (position set from script.js) */
.whale{
  position:fixed;left:0;top:0;z-index:0;pointer-events:none;
  width:clamp(170px,20vw,300px);will-change:transform;
  opacity:0;transition:opacity 1.8s ease;
}
.whale.on{opacity:var(--whale-op);}
.whale-inner{transform-origin:50% 50%;}
.whale svg{display:block;width:100%;height:auto;}
.whale{color:var(--wb1);}

/* depth gauge — wide screens only */
.depth-meter{
  display:none;position:fixed;inset-inline-end:20px;top:50%;transform:translateY(-50%);
  z-index:5;flex-direction:column;align-items:center;gap:12px;pointer-events:none;
  color:var(--ink-dim);font-size:11px;font-family:var(--font-display);letter-spacing:.06em;
}
@media (min-width:1400px){.depth-meter{display:flex;}}
.dm-line{
  position:relative;width:1px;height:160px;
  background:linear-gradient(180deg,rgba(var(--blue-glow),.55),rgba(var(--violet-glow),.5),rgba(var(--pink-glow),.5));
}
.dm-line::after{
  content:"";position:absolute;top:0;bottom:0;inset-inline-start:-3px;width:7px;opacity:.45;
  background:repeating-linear-gradient(180deg,var(--ink-dim) 0 1px,transparent 1px 16px);
}
.dm-dot{
  position:absolute;left:50%;top:0;width:7px;height:7px;margin:-3px 0 0 -3px;border-radius:50%;
  background:var(--violet);box-shadow:0 0 12px rgba(var(--violet-glow),.9);
}
.dm-val{min-width:56px;text-align:center;direction:ltr;}
[dir="rtl"] .dm-val{direction:rtl;}

/* depth tag on section titles */
.kdepth{
  margin-inline-start:6px;padding:2px 10px;border-radius:999px;border:1px solid var(--border);
  color:var(--ink-dim);font-size:11px;letter-spacing:.04em;text-transform:none;
  font-family:var(--font-display);font-weight:500;
}

/* theme toggle */
.theme-btn{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--border);
  background:var(--surface);color:var(--ink-soft);cursor:pointer;
  display:grid;place-items:center;padding:0;
  transition:border-color .3s var(--ease),transform .3s var(--ease),color .3s var(--ease);
}
.theme-btn:hover{border-color:rgba(var(--blue-glow),.55);color:var(--ink);transform:rotate(14deg);}
.theme-btn svg{grid-area:1/1;width:18px;height:18px;transition:transform .5s var(--ease),opacity .3s var(--ease);}
.theme-btn .i-moon{opacity:0;transform:rotate(-70deg) scale(.5);}
:root[data-theme="light"] .theme-btn .i-sun{opacity:0;transform:rotate(70deg) scale(.5);}
:root[data-theme="light"] .theme-btn .i-moon{opacity:1;transform:none;}
html.theme-anim *,html.theme-anim *::before,html.theme-anim *::after{
  transition:background-color .4s ease,color .4s ease,border-color .4s ease,fill .4s ease,stroke .4s ease !important;
}

/* light-theme refinements */
:root[data-theme="light"] .portrait-frame{box-shadow:0 30px 70px -36px rgba(46,70,120,.5);}
:root[data-theme="light"] .side-whale{filter:invert(1);opacity:.07;}
:root[data-theme="light"] .btn-primary{color:#fff;}
:root[data-theme="light"] .tl-card:hover,
:root[data-theme="light"] .card:hover{background:rgba(255,255,255,.78);}
:root[data-theme="light"] .grain{opacity:.05;}
:root[data-theme="light"] header.scrolled{box-shadow:0 8px 30px -20px rgba(30,60,110,.35);}
:root[data-theme="light"] .hero-stats strong{font-weight:400;}

@media (max-width:760px){.whale.on{opacity:calc(var(--whale-op) * .7);}}

/* grab handle for the whale (mouse only) */
.whale-hit{display:none;position:fixed;left:0;top:0;z-index:6;border-radius:50%;cursor:grab;
  user-select:none;-webkit-user-select:none;touch-action:none;will-change:transform;}
.whale-hit.grabbing{cursor:grabbing;}
.whale.hot{opacity:calc(var(--whale-op) + .3);}
.whale{transition:opacity 1.8s ease;}
.whale.hot{transition:opacity .35s ease;}

/* portrait a bit higher on laptop / desktop */
@media (min-width: 981px) {
  .portrait-wrap { transform: translateY(-44px); }
}