/* ===========================================================
   Hasibul Hossain — portfolio
   Palette: near-black stock, teal shadow / amber highlight
   (a nod to film colour grading, not a decoration)
=========================================================== */

:root{
  --bg:        #0d0f10;
  --bg-alt:    #131617;
  --ink:       #ede9e2;
  --ink-dim:   #9a9c9a;
  --teal:      #3e6b74;
  --teal-dim:  #274347;
  --amber:     #d98341;
  --rule:      rgba(237,233,226,0.10);
  --font-display: "Oswald", "Arial Narrow", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  font-weight:300;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}

a{ color:inherit; text-decoration:none; }

::selection{ background:var(--amber); color:#141414; }

/* film-grain overlay, purely decorative, sits above the whole page */
.grain{
  position:fixed; inset:0; z-index:50; pointer-events:none;
  opacity:.05; mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- fixed chrome ---------- */
.chrome{
  position:fixed; top:0; left:0; right:0; z-index:40;
  display:flex; justify-content:space-between; align-items:center;
  padding:1.6rem clamp(1.2rem,4vw,3rem);
  pointer-events:none;
}
.chrome > *{ pointer-events:auto; }

.mark{
  font-family:var(--font-display);
  font-size:1.1rem; letter-spacing:.08em;
  border:1px solid var(--rule); border-radius:100px;
  padding:.4rem .9rem;
  background:rgba(13,15,16,.4);
  backdrop-filter:blur(6px);
}

.menu-toggle{
  width:44px; height:44px; border-radius:100px;
  border:1px solid var(--rule); background:rgba(13,15,16,.4);
  backdrop-filter:blur(6px);
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:5px;
  cursor:pointer;
}
.menu-toggle span{
  width:16px; height:1px; background:var(--ink); display:block;
  transition:transform .25s ease, opacity .25s ease;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }

/* ---------- scene index nav ---------- */
.scene-nav{
  position:fixed; top:0; right:0; height:100vh; width:min(320px,100vw);
  z-index:35; background:var(--bg-alt);
  border-left:1px solid var(--rule);
  transform:translateX(100%);
  transition:transform .4s cubic-bezier(.65,0,.35,1);
  display:flex; align-items:center;
}
.scene-nav.open{ transform:translateX(0); }
.scene-nav ol{ list-style:none; margin:0; padding:0 clamp(1.5rem,5vw,3rem); width:100%; }
.scene-nav li + li{ margin-top:1.1rem; }
.scene-nav a{
  font-family:var(--font-display);
  font-size:clamp(1.1rem,2.4vw,1.5rem);
  letter-spacing:.02em;
  color:var(--ink-dim);
  transition:color .2s ease;
  display:inline-block;
}
.scene-nav a:hover, .scene-nav a.active, .scene-nav a:focus-visible{ color:var(--amber); }

/* ---------- scenes ---------- */
.scene{
  min-height:100vh;
  padding:clamp(2rem,6vw,5rem) clamp(1.2rem,6vw,5rem);
  display:flex; flex-direction:column; justify-content:center;
  position:relative;
  border-bottom:1px solid var(--rule);
}
.content-scene.alt{ background:var(--bg-alt); }

/* hero */
.hero-scene{
  align-items:flex-start;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(62,107,116,.35), transparent 55%),
    radial-gradient(ellipse at 85% 90%, rgba(217,131,65,.16), transparent 50%),
    var(--bg);
}
.hero-frame{ max-width:900px; }
.slate-line{
  font-family:var(--font-display);
  font-size:.8rem; letter-spacing:.18em; text-transform:uppercase;
  color:var(--teal); margin:0 0 1.4rem;
}
.hero-title{
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(3.2rem,11vw,8.5rem);
  line-height:.95;
  letter-spacing:-.01em;
  margin:0 0 1.6rem;
}
.hero-title .line{
  display:block;
  opacity:0; transform:translateY(28px);
  animation:reveal .9s cubic-bezier(.2,.7,.2,1) forwards;
}
.hero-title .line:nth-child(2){ animation-delay:.12s; color:var(--amber); }
@keyframes reveal{ to{ opacity:1; transform:translateY(0); } }

.hero-role{
  font-family:var(--font-display);
  font-size:clamp(1rem,2.4vw,1.4rem);
  color:var(--ink); margin:0 0 .6rem;
}
.hero-role .sep{ color:var(--teal); margin:0 .3em; }
.hero-dept{ color:var(--ink-dim); font-size:.95rem; max-width:34ch; margin:0; }

.scroll-cue{
  position:absolute; left:clamp(1.2rem,6vw,5rem); bottom:2.4rem;
  display:flex; align-items:center; gap:.8rem;
  font-family:var(--font-display); font-size:.85rem; letter-spacing:.1em;
  color:var(--ink-dim);
}
.cue-line{ width:34px; height:1px; background:var(--ink-dim); position:relative; overflow:hidden; }
.cue-line::after{
  content:""; position:absolute; inset:0; background:var(--amber);
  transform:translateX(-100%);
  animation:cue 1.8s ease-in-out infinite;
}
@keyframes cue{
  0%{ transform:translateX(-100%); }
  50%{ transform:translateX(0); }
  100%{ transform:translateX(100%); }
}

/* content scenes */
.scene-grid{
  display:grid;
  grid-template-columns:minmax(140px,260px) 1fr;
  gap:clamp(2rem,6vw,6rem);
  max-width:1100px;
  margin:0 auto;
  width:100%;
}
.scene-label{ position:sticky; top:8rem; align-self:start; }
.scene-number{
  display:block; font-family:var(--font-display);
  font-size:clamp(2.4rem,6vw,3.6rem); color:var(--teal); line-height:1;
  margin-bottom:.4rem;
}
.scene-label h2{
  font-family:var(--font-display); font-weight:500;
  font-size:clamp(1.5rem,3vw,2.1rem); margin:0; letter-spacing:-.01em;
}
.scene-body{ max-width:62ch; }
.scene-body p{ margin:0 0 1.3rem; color:var(--ink); font-size:1.02rem; }
.scene-body p:last-child{ margin-bottom:0; }

/* contact */
.contact-scene{ align-items:flex-start; justify-content:space-between; background:var(--bg); }
.contact-frame{ max-width:760px; }
.contact-title{
  font-family:var(--font-display); font-weight:600;
  font-size:clamp(2.6rem,8vw,5.2rem); line-height:1.02; margin:0 0 2.4rem;
}
.contact-details{ display:flex; flex-direction:column; gap:0; margin-bottom:2rem; }
.contact-row{
  display:flex; justify-content:space-between; align-items:baseline;
  padding:1.1rem 0; border-top:1px solid var(--rule);
}
.contact-row:last-child{ border-bottom:1px solid var(--rule); }
a.contact-row:hover .contact-value, a.contact-row:focus-visible .contact-value{ color:var(--amber); }
.contact-label{ font-family:var(--font-display); letter-spacing:.06em; color:var(--ink-dim); font-size:.9rem; }
.contact-value{ font-size:1.1rem; transition:color .2s ease; }
.social-row{ display:flex; gap:1.6rem; }
.social-row a{ font-family:var(--font-display); font-size:.9rem; letter-spacing:.05em; color:var(--ink-dim); }
.social-row a:hover, .social-row a:focus-visible{ color:var(--amber); }

.foot{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:.6rem;
  color:var(--ink-dim); font-size:.8rem; margin-top:3rem;
}

/* focus visibility */
a:focus-visible, button:focus-visible{
  outline:2px solid var(--amber); outline-offset:3px;
}

/* ---------- responsive ---------- */
@media (max-width:760px){
  .scene-grid{ grid-template-columns:1fr; }
  .scene-label{ position:static; margin-bottom:1rem; }
  .contact-row{ flex-direction:column; gap:.2rem; align-items:flex-start; }
}

@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  .hero-title .line{ animation:none; opacity:1; transform:none; }
  .cue-line::after{ animation:none; transform:translateX(0); }
}