/* =========================
   Arshdeep Portfolio — Deep Tech Theme (Readable)
   Works with #bg-rotator + assets/img/background/bg*.jpg
   ========================= */

:root{
  --bg0:#050A14;
  --text:#EAF2FF;
  --text2:#C9D6F2;
  --muted:#9FB2D6;

  --accent:#7C5CFF;
  --accent2:#2EE0C9;

  --card: rgba(10,18,38,.62);
  --card2: rgba(10,18,38,.48);
  --border: rgba(255,255,255,.14);

  --shadow: 0 18px 60px rgba(0,0,0,.45);
  --shadowSoft: 0 10px 28px rgba(0,0,0,.35);

  --r-lg: 18px;
  --r-xl: 22px;

  --max: 1120px;

  --h1: clamp(30px, 4vw, 46px);
  --p: 16px;
}

*{ box-sizing:border-box; margin:0; padding:0; }
html,body{ height:100%; }

body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  line-height: 1.65;
  font-size: var(--p);
  -webkit-font-smoothing: antialiased;
  background: var(--bg0);
}

/* Fullscreen background layer */
#bg-rotator{
  position: fixed;
  inset: 0;
  z-index: -2;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.03);
  filter: saturate(1.06) contrast(1.06);
  opacity: 1;
  transition: opacity 900ms ease;
}

/* Dark overlay to guarantee readability */
body::before{
  content:"";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(900px 600px at 20% 10%, rgba(124,92,255,.16), transparent 60%),
    radial-gradient(900px 600px at 85% 15%, rgba(46,224,201,.10), transparent 60%),
    linear-gradient(180deg, rgba(5,10,20,.86), rgba(5,10,20,.70), rgba(5,10,20,.88));
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; text-decoration-color: rgba(255,255,255,.35); }

.container, main{
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px 16px 70px;
  position: relative;
  z-index: 1;
}

/* ================= Header / Nav ================= */

.header, header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  margin-bottom: 18px;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
}

.brand .name{
  font-weight: 850;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: 13px;
  color: var(--text2);
}

.nav{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
}

.nav a{
  font-size: 14px;
  color: var(--text2);
  padding: 9px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: background .15s ease, border-color .15s ease, color .15s ease, transform .15s ease;
}

.nav a:hover{
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.12);
  color: var(--text);
  text-decoration:none;
}

.nav a.active{
  background: rgba(124,92,255,.22);
  border-color: rgba(124,92,255,.35);
  color: var(--text);
}

.header-right{
  display:flex;
  gap:10px;
  align-items:center;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.06);
  color: var(--text2);
  cursor:pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}

.btn:hover{
  transform: translateY(-1px);
  background: rgba(255,255,255,.10);
  border-color: rgba(255,255,255,.26);
  color: var(--text);
  text-decoration:none;
}

.btn-primary{
  border: 1px solid rgba(124,92,255,.45);
  background: linear-gradient(135deg, rgba(124,92,255,.92), rgba(124,92,255,.55));
  color: var(--text);
  box-shadow: 0 12px 30px rgba(124,92,255,.22);
}

.btn-primary:hover{
  box-shadow: 0 16px 36px rgba(124,92,255,.28);
}

/* Mobile nav toggle */
.hamburger{
  display:none;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.06);
  color: var(--text);
  font-weight: 900;
  cursor:pointer;
}

/* ================= Hero ================= */

.hero{
  border-radius: var(--r-xl);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,.10), rgba(255,255,255,.06));
  box-shadow: var(--shadow);
  overflow:hidden;
  position:relative;
}

.hero-inner{
  display:grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 18px;
  padding: 20px;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(0,0,0,.20);
  color: var(--text2);
  font-size: 13px;
  width: fit-content;
  margin-bottom: 10px;
}

.dot{
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--accent2);
  box-shadow: 0 0 0 6px rgba(46,224,201,.14);
}

h1{
  font-size: var(--h1);
  line-height: 1.12;
  letter-spacing: .2px;
  margin-bottom: 10px;
}

.lead{
  color: var(--text2);
  max-width: 62ch;
  margin-bottom: 14px;
  font-size: 16px;
}

.pills{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.pill{
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color: var(--text2);
  font-size: 13px;
}

.cta-row{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items:center;
  margin-top: 6px;
}

.note{
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

.hero-side{
  border-radius: var(--r-lg);
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(0,0,0,.22);
  padding: 14px;
  box-shadow: var(--shadowSoft);
  height: 100%;
  display:flex;
  flex-direction:column;
  gap: 10px;
}

.profile{
  display:flex;
  align-items:center;
  gap: 12px;
}

.avatar{
  width: 74px;
  height: 74px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.16);
  overflow:hidden;
  background: rgba(255,255,255,.06);
  flex: 0 0 auto;
}

.avatar img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

.profile .title{
  font-weight: 900;
  font-size: 16px;
}

.profile .role{
  color: var(--muted);
  font-size: 13px;
  margin-top: 2px;
}

.side-text{
  color: var(--text2);
  font-size: 14px;
}

.meta{
  display:grid;
  gap: 8px;
  margin-top: 6px;
}

.meta a{
  color: var(--text);
  text-decoration:none;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  font-size: 14px;
}

.meta a span{
  display:block;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 2px;
}

/* ================= Sections ================= */

.section{
  margin-top: 22px;
}

.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap: 12px;
  margin-bottom: 10px;
}

.section-title{
  font-size: 14px;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-weight: 950;
}

.section-subtitle{
  color: var(--text2);
  font-size: 14px;
  max-width: 70ch;
}

/* ================= Services tiles (ONLY names + indicators) ================= */

.grid-4{
  display:grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.tile{
  border-radius: var(--r-lg);
  border: 1px solid rgba(255,255,255,.14);
  background: linear-gradient(180deg, rgba(255,255,255,.10), rgba(255,255,255,.06));
  box-shadow: var(--shadowSoft);
  padding: 14px;
  cursor:pointer;
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
  min-height: 112px;
}

.tile:hover{
  transform: translateY(-2px);
  border-color: rgba(124,92,255,.35);
  box-shadow: 0 0 0 3px rgba(124,92,255,.10), var(--shadowSoft);
}

.tile h3{
  font-size: 15px;
  font-weight: 950;
  margin-bottom: 10px;
}

.indicators{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
}

.ind{
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(0,0,0,.22);
  color: var(--text2);
  font-size: 12px;
}

/* ================= Accordion lists ================= */

.list{
  display:flex;
  flex-direction: column;
  gap: 14px;
}

.item{
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, rgba(255,255,255,.10), rgba(255,255,255,.06));
  border: 1px solid rgba(255,255,255,.14);
  box-shadow: var(--shadowSoft);
  overflow:hidden;
}

.item-btn{
  width: 100%;
  text-align:left;
  padding: 14px 16px;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
  border: none;
  background: transparent;
  cursor:pointer;
  color: var(--text);
}

.item-title{
  font-size: 16px;
  font-weight: 950;
}

.item-meta{
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
}

.item-icon{
  min-width: 40px;
  height: 40px;
  display:grid;
  place-items:center;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(0,0,0,.24);
  color: var(--text);
  font-weight: 950;
  font-size: 18px;
}

.item-content{
  display:none;
  padding: 14px 16px 16px;
  border-top: 1px solid rgba(255,255,255,.12);
  color: var(--text2);
  font-size: 15px;
}

.item-content.open{ display:block; }

.block-title{
  margin-top: 12px;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 950;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text);
}

.bullets{
  padding-left: 18px;
  margin: 6px 0 10px;
}

.bullets li{
  margin-bottom: 7px;
  color: var(--text2);
}

.img-grid{
  margin-top: 12px;
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.img-card{
  border-radius: 14px;
  overflow:hidden;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(0,0,0,.25);
}

.img-card img{
  width: 100%;
  display:block;
  object-fit: cover;
  max-height: 220px;
}

.img-cap{
  padding: 9px 10px 10px;
  font-size: 12px;
  color: var(--muted);
}

/* ================= Modal ================= */

.modal-overlay{
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.58);
  display:none;
  align-items:center;
  justify-content:center;
  z-index: 999;
  padding: 18px;
}

.modal{
  max-width: 560px;
  width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.16);
  background: linear-gradient(180deg, rgba(10,18,38,.98), rgba(6,10,20,.98));
  box-shadow: var(--shadow);
  padding: 16px;
}

.modal-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.modal-title{
  font-size: 16px;
  font-weight: 950;
}

.modal-close{
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 12px;
  cursor:pointer;
}

.modal-body{
  color: var(--text2);
  font-size: 15px;
}

.modal-body ul{
  margin-top: 8px;
  padding-left: 18px;
}

.modal-body li{
  margin-bottom: 7px;
}

/* ================= Contact block ================= */

.contact-card{
  border-radius: var(--r-xl);
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(0,0,0,.22);
  box-shadow: var(--shadowSoft);
  padding: 16px;
  display:flex;
  justify-content:space-between;
  gap: 12px;
  flex-wrap:wrap;
}

.contact-card p{
  color: var(--text2);
  max-width: 70ch;
}

/* ================= Responsive ================= */

@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; }
  .grid-4{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px){
  .hamburger{ display:inline-flex; }

  .nav{
    width: 100%;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap: 8px;
    margin-top: 8px;
  }
  .nav.open{ display:flex; }
  .nav a{ width: 100%; }

  .grid-4{ grid-template-columns: 1fr; }
  .img-grid{ grid-template-columns: 1fr; }
}
.hamburger{ display:none; }

@media (max-width: 560px){
  .hamburger{ display:inline-flex; }

  .nav{
    width: 100%;
    display:none;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    margin-top: 10px;
  }

  .nav.open{ display:flex; }

  .nav a{ width: 100%; }
}
@media (max-width: 560px){
  .hamburger{ display:inline-flex; }

  #siteNav{
    width: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    margin-top: 10px;
  }

  #siteNav.open{
    display: flex;
  }

  #siteNav a{
    width: 100%;
  }
}
/* CSS-only mobile nav */
#navcheck{
  position: absolute;
  left: -9999px;
}

@media (max-width: 560px){
  .hamburger{ display:inline-flex; }

  #siteNav{
    width: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    margin-top: 10px;
  }

  /* show nav when checkbox is checked */
  #navcheck:checked ~ #siteNav{
    display: flex;
  }

  #siteNav a{ width: 100%; }
}
/* =========================
   Image Lightbox (click to zoom)
   ========================= */

.lightbox{
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
  z-index: 9999;

  /* backdrop */
  background: rgba(0,0,0,.70);
  backdrop-filter: blur(6px);
}

.lightbox.open{ display:flex; }

.lightbox__figure{
  max-width: min(1100px, 96vw);
  max-height: 86vh;
  margin: 0;

  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(8,12,22,.92);
  box-shadow: 0 30px 90px rgba(0,0,0,.6);
}

.lightbox__img{
  display: block;
  width: 100%;
  height: auto;
  max-height: 76vh;
  object-fit: contain;
  background: rgba(0,0,0,.35);
}

.lightbox__cap{
  padding: 10px 12px 12px;
  font-size: 13px;
  color: rgba(255,255,255,.78);
}

.lightbox__close{
  position: fixed;
  top: 14px;
  right: 14px;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.08);
  color: #fff;
  cursor: pointer;
  font-size: 18px;
}

.lightbox__close:hover{
  background: rgba(255,255,255,.12);
}

body.lb-lock{
  overflow: hidden;
}

/* make screenshots feel clickable */
.img-card img{
  cursor: zoom-in;
}