/* Mansour Tabbaa - XR portfolio
   Layout concept: a dark "engine viewport" ground, warm sandstone accent taken from the brand mark's
   orange and the Sedona portrait, a wide technical display face for titles and a mono face for
   the Problem / Approach labels that structure every breakdown. */
:root{
  --bg:#111417; --bg-2:#171b20; --bg-3:#1f252c;
  --fg:#ece7df; --fg-2:#aab0b6; --fg-3:#737a82;
  --line:rgba(236,231,223,.10); --line-2:rgba(236,231,223,.20);
  --accent:#e8a05a; --accent-2:#f4c994; --accent-ink:#1a1108;
  --accent-soft:rgba(232,160,90,.14);
  --font-display:"Archivo","Helvetica Neue",Arial,sans-serif;
  --font-body:"IBM Plex Sans","Segoe UI",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;
  --max:1180px; --gutter:clamp(16px,4vw,48px);
  --r:6px; --r-lg:12px;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--fg);font:400 17px/1.6 var(--font-body);
  -webkit-font-smoothing:antialiased;min-height:100%}
img,video,iframe{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
h1,h2,h3,h4{font-family:var(--font-display);font-variation-settings:"wdth" 112;line-height:1.05;margin:0;text-wrap:balance;letter-spacing:-.01em}
h1{font-size:clamp(2.6rem,7vw,5.4rem);font-weight:600}
h2{font-size:clamp(1.7rem,3.4vw,2.6rem);font-weight:600}
h3{font-size:clamp(1.15rem,1.8vw,1.4rem);font-weight:600;font-variation-settings:"wdth" 105}
p{margin:0}
code{font-family:var(--font-mono);font-size:.88em;background:var(--bg-3);padding:.08em .4em;border-radius:4px;color:var(--accent-2)}
.wrap{max-width:var(--max);margin-inline:auto;padding-inline:var(--gutter)}
.eyebrow{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.muted{color:var(--fg-2)}
.lede{font-size:clamp(1.1rem,1.6vw,1.3rem);line-height:1.5;color:var(--fg-2);max-width:62ch}

/* ---- nav ---- */
.nav{position:sticky;top:0;z-index:50;background:rgba(17,20,23,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;height:64px}
.nav .brand{display:flex;align-items:center;gap:.8rem}
.nav .brand img{height:26px;width:auto}
.nav .brand span{font-family:var(--font-display);font-variation-settings:"wdth" 110;font-weight:600;font-size:.95rem;letter-spacing:.02em}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:clamp(.9rem,3vw,2rem);font-family:var(--font-mono);font-size:.8rem;letter-spacing:.08em;text-transform:uppercase}
.nav a{color:var(--fg-2);padding-block:.4rem;border-bottom:1px solid transparent;transition:color .2s,border-color .2s}
.nav a:hover,.nav a[aria-current="page"]{color:var(--fg);border-bottom-color:var(--accent)}
@media (max-width:520px){.nav .brand span{display:none}}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:.55rem;font-family:var(--font-mono);font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;
  padding:.85rem 1.25rem;border-radius:var(--r);border:1px solid var(--line-2);color:var(--fg);transition:background .2s,border-color .2s,color .2s,transform .2s}
.btn:hover{border-color:var(--accent);transform:translateY(-1px)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{background:var(--accent-2);border-color:var(--accent-2)}
.btn svg{width:1em;height:1em}

/* ---- hero ---- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.hero .wrap{position:relative;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:clamp(2rem,5vw,4.5rem);align-items:center;padding-block:clamp(3rem,7vw,6rem)}
.hero-copy{display:flex;flex-direction:column;gap:1.4rem;min-width:0}
.hero-copy h1 span{display:block;color:var(--fg-2);font-weight:400;font-variation-settings:"wdth" 100;font-size:.42em;letter-spacing:0;margin-top:.5rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:.8rem}
.hero-facts{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;font-family:var(--font-mono);font-size:.78rem;color:var(--fg-3);letter-spacing:.04em}
.hero-facts b{color:var(--fg-2);font-weight:500}
.hero-media{min-width:0}
.frame{position:relative;border-radius:var(--r-lg);overflow:hidden;background:#000;border:1px solid var(--line-2);box-shadow:0 30px 80px -30px rgba(0,0,0,.8),0 0 0 1px rgba(0,0,0,.4)}
.frame .ratio{aspect-ratio:16/9;max-width:100%;background-color:#000;background-size:cover;background-position:center}
.frame iframe{width:100%;height:100%;border:0}
.frame-cap{display:flex;justify-content:space-between;align-items:center;gap:.5rem 1rem;flex-wrap:wrap;padding:.7rem 1rem;font-family:var(--font-mono);font-size:.74rem;color:var(--fg-3);background:var(--bg-2);border-top:1px solid var(--line)}
.frame-cap b{color:var(--fg-2);font-weight:500}
.frame-cap a{color:var(--accent);white-space:nowrap}
.frame-cap a:hover{color:var(--accent-2)}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr}}

/* ---- sections ---- */
.section{padding-block:clamp(3.5rem,8vw,6.5rem)}
.section + .section{border-top:1px solid var(--line)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:1.5rem;flex-wrap:wrap;margin-bottom:clamp(1.8rem,4vw,3rem)}
.section-head .eyebrow{display:block;margin-bottom:.6rem}
.section-head p{max-width:52ch}

/* ---- project grid ---- */
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(1.2rem,3vw,2.2rem)}
@media (max-width:720px){.grid{grid-template-columns:1fr}}
.card{display:flex;flex-direction:column;gap:.9rem;min-width:0;color:inherit}
.card .thumb{position:relative;aspect-ratio:16/9;max-width:100%;border-radius:var(--r-lg);overflow:hidden;background:var(--bg-3);border:1px solid var(--line)}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.2,.7,.2,1),filter .4s;filter:saturate(.92)}
.card:hover .thumb img{transform:scale(1.035);filter:saturate(1.05)}
.card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 55%,rgba(17,20,23,.55));pointer-events:none}
.card .tag{position:absolute;top:.8rem;left:.8rem;z-index:1;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;padding:.3rem .55rem;border-radius:4px;background:rgba(17,20,23,.72);border:1px solid var(--line-2);color:var(--fg-2);backdrop-filter:blur(6px)}
.card .play{position:absolute;right:.8rem;bottom:.8rem;z-index:1;width:40px;height:40px;border-radius:50%;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;opacity:0;transform:translateY(6px);transition:opacity .25s,transform .25s}
.card:hover .play{opacity:1;transform:none}
.card .play svg{width:14px;height:14px;margin-left:2px}
.card-body{display:flex;flex-direction:column;gap:.35rem;padding-inline:.15rem}
.card-body h3{transition:color .2s}
.card:hover .card-body h3{color:var(--accent-2)}
.card-body p{color:var(--fg-2);font-size:.98rem}
.meta{display:flex;flex-wrap:wrap;gap:.3rem .9rem;font-family:var(--font-mono);font-size:.74rem;color:var(--fg-3);letter-spacing:.04em;margin-top:.2rem}
.meta span + span::before{content:"\00b7";margin-right:.9rem;color:var(--fg-3)}
.card.locked .thumb{background:
  repeating-linear-gradient(135deg,transparent 0 14px,rgba(236,231,223,.03) 14px 15px),var(--bg-2)}
.card.locked .thumb img{object-fit:contain;padding:14%;filter:none;opacity:.9}
.card.locked:hover .thumb img{transform:none}

/* ---- toolkit ---- */
.tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:1rem}
.tool{display:flex;flex-direction:column;align-items:center;gap:.7rem;padding:1.2rem .6rem 1rem;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--bg-2);text-align:center}
.tool img{height:40px;width:auto;max-width:72px;object-fit:contain;filter:grayscale(1) brightness(1.15);opacity:.85;transition:filter .3s,opacity .3s}
.tool:hover img{filter:none;opacity:1}
.tool span{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--fg-3)}
.skills{display:flex;flex-wrap:wrap;gap:.5rem;margin:1.5rem 0 0;padding:0}
.skills li{list-style:none;font-family:var(--font-mono);font-size:.76rem;letter-spacing:.04em;padding:.4rem .7rem;border-radius:999px;border:1px solid var(--line-2);color:var(--fg-2)}

/* ---- about teaser / about page ---- */
.about{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(2rem,5vw,4rem);align-items:start}
@media (max-width:820px){.about{grid-template-columns:1fr}}
.portrait{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);aspect-ratio:3/4;max-width:100%;background:var(--bg-3)}
.portrait img{width:100%;height:100%;object-fit:cover}
.prose{display:flex;flex-direction:column;gap:1.1rem;max-width:66ch}
.prose p{color:var(--fg-2)}
.prose strong{color:var(--fg);font-weight:500}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:1rem 2rem;margin:.5rem 0 0}
.facts div{display:flex;flex-direction:column;gap:.25rem;border-top:1px solid var(--line-2);padding-top:.7rem}
.facts dt{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--fg-3)}
.facts dd{margin:0;color:var(--fg)}
.timeline{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.timeline li{display:grid;grid-template-columns:minmax(120px,160px) 1fr;gap:1rem 2rem;padding-block:1.4rem;border-top:1px solid var(--line)}
.timeline li:last-child{border-bottom:1px solid var(--line)}
.timeline time{font-family:var(--font-mono);font-size:.78rem;color:var(--fg-3);letter-spacing:.04em;padding-top:.3rem}
.timeline h3{font-size:1.1rem}
.timeline .role{font-family:var(--font-mono);font-size:.78rem;color:var(--accent);letter-spacing:.06em;text-transform:uppercase;margin:.25rem 0 .6rem}
.timeline p{color:var(--fg-2);font-size:.98rem;max-width:62ch}
@media (max-width:560px){.timeline li{grid-template-columns:1fr;gap:.3rem}}
.honors{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}
.honors div{padding:1.2rem 1.3rem;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--bg-2);color:var(--fg-2);font-size:.98rem}
.honors b{display:block;color:var(--fg);font-weight:500;margin-bottom:.3rem}

/* ---- project page ---- */
.project-head{padding-block:clamp(2.5rem,6vw,4.5rem) clamp(1.5rem,3vw,2.5rem)}
.project-head .wrap{display:flex;flex-direction:column;gap:1.3rem}
.project-head .back{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-3);display:inline-flex;gap:.5rem;align-items:center}
.project-head .back:hover{color:var(--accent)}
.specs{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem 2rem;margin:0;padding-top:1.2rem;border-top:1px solid var(--line-2)}
.specs div{display:flex;flex-direction:column;gap:.2rem}
.specs dt{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--fg-3)}
.specs dd{margin:0;color:var(--fg);font-size:.98rem}
.project-video{padding-bottom:clamp(2rem,5vw,4rem)}
.breakdown{display:flex;flex-direction:column;gap:clamp(3rem,7vw,5.5rem);padding-block:clamp(2rem,5vw,4rem)}
.problem{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(1.5rem,4vw,3.5rem);align-items:start}
.problem.flip{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.problem.flip .problem-text{order:2}
@media (max-width:860px){.problem,.problem.flip{grid-template-columns:1fr}.problem.flip .problem-text{order:0}}
.problem-text{display:flex;flex-direction:column;gap:1rem;min-width:0;position:sticky;top:84px}
@media (max-width:860px){.problem-text{position:static}}
.problem-text .label{display:flex;align-items:center;gap:.7rem;font-family:var(--font-mono);font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.problem-text .label::after{content:"";flex:1;height:1px;background:var(--line-2)}
.problem-text h2{font-size:clamp(1.4rem,2.4vw,1.9rem)}
.problem-text .approach{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--fg-3);margin-top:.6rem}
.problem-text p{color:var(--fg-2);max-width:60ch}
.problem-text ul{margin:0;padding-left:1.1rem;color:var(--fg-2);display:flex;flex-direction:column;gap:.4rem}
.problem-text li::marker{color:var(--accent)}
figure{margin:0;display:flex;flex-direction:column;gap:.6rem;min-width:0}
figure button{all:unset;cursor:zoom-in;display:block;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:var(--bg-3);transition:border-color .2s}
figure button:hover{border-color:var(--line-2)}
figure button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
figure img{width:100%;height:auto}
figcaption{font-family:var(--font-mono);font-size:.74rem;color:var(--fg-3);letter-spacing:.03em;display:flex;justify-content:space-between;gap:1rem}
figcaption span:last-child{opacity:.7}
.fig-stack{display:flex;flex-direction:column;gap:1.2rem}
.note{font-family:var(--font-mono);font-size:.78rem;color:var(--fg-3);border-left:2px solid var(--line-2);padding:.4rem 0 .4rem 1rem;max-width:70ch}
pre.code{margin:0;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-lg);padding:1.2rem 1.3rem;overflow:auto;font:400 .8rem/1.55 var(--font-mono);color:var(--fg-2);max-height:560px}
pre.code code{font:inherit;color:inherit;background:none;padding:0;border-radius:0}
pre.code .k{color:var(--accent-2)} pre.code .c{color:var(--fg-3)} pre.code .f{color:#9fd3c7}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:1rem;padding-block:clamp(2rem,5vw,3.5rem);border-top:1px solid var(--line)}
.pager a{display:flex;flex-direction:column;gap:.35rem;padding:1.2rem 1.3rem;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--bg-2);min-width:0;transition:border-color .2s}
.pager a:hover{border-color:var(--accent)}
.pager a.next{text-align:right;align-items:flex-end}
.pager small{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--fg-3)}
.pager b{font-family:var(--font-display);font-variation-settings:"wdth" 108;font-weight:600;font-size:1.05rem}
@media (max-width:560px){.pager{grid-template-columns:1fr}.pager a.next{text-align:left;align-items:flex-start}}
.status{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-mono);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--fg-2);padding:.45rem .8rem;border-radius:999px;border:1px solid var(--line-2);background:var(--bg-2)}
.status::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}

/* ---- contact / footer ---- */
.contact{background:var(--bg-2);border-top:1px solid var(--line)}
.contact .wrap{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:2rem 4rem;padding-block:clamp(3rem,7vw,5.5rem)}
@media (max-width:760px){.contact .wrap{grid-template-columns:1fr}}
.contact h2{margin-bottom:1rem}
.email{font-family:var(--font-display);font-variation-settings:"wdth" 105;font-weight:500;font-size:clamp(1.15rem,2.6vw,1.7rem);color:var(--accent-2);word-break:break-all;user-select:all}
.email:hover{color:var(--accent)}
.links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.links li{border-top:1px solid var(--line)}
.links li:last-child{border-bottom:1px solid var(--line)}
.links a{display:flex;justify-content:space-between;align-items:center;padding:.95rem 0;font-family:var(--font-mono);font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;color:var(--fg-2);transition:color .2s,padding-left .2s}
.links a:hover{color:var(--fg);padding-left:.4rem}
.links a span:last-child{color:var(--fg-3);font-size:.74rem;text-transform:none;letter-spacing:0}
.foot{border-top:1px solid var(--line);background:var(--bg-2)}
.foot .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.6rem 2rem;padding-block:1.4rem;font-family:var(--font-mono);font-size:.72rem;color:var(--fg-3);letter-spacing:.04em}

/* ---- lightbox ---- */
dialog.lightbox{border:0;padding:0;background:transparent;max-width:min(96vw,1600px);max-height:96vh;width:auto}
dialog.lightbox::backdrop{background:rgba(8,10,12,.92);backdrop-filter:blur(6px)}
dialog.lightbox img{max-width:min(96vw,1600px);max-height:88vh;width:auto;height:auto;border-radius:var(--r);margin-inline:auto}
dialog.lightbox p{text-align:center;margin-top:.8rem;font-family:var(--font-mono);font-size:.76rem;color:var(--fg-2)}
dialog.lightbox button{all:unset;cursor:pointer;color:var(--fg);font-family:var(--font-mono);font-size:.8rem;letter-spacing:.08em;padding:.6rem .9rem;border:1px solid var(--line-2);border-radius:var(--r);background:rgba(17,20,23,.7);position:fixed;top:1rem;right:1rem}

/* ---- reveal ---- */
.reveal{opacity:1;transform:none}
@media (prefers-reduced-motion:no-preference){
  .js .reveal{opacity:0;transform:translateY(14px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
  .js .reveal.in{opacity:1;transform:none}
}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--accent-ink);padding:.6rem 1rem;z-index:100}
.skip:focus{left:1rem;top:1rem}