/* ====================================================================
   BTech.org — custom theme over Bootstrap 5
   Aesthetic: confident, vibrant "academic ambition" — deep indigo base
   with saffron / coral / teal / electric-blue accents.
   ==================================================================== */

:root {
  --ink:        #14123a;   /* deep indigo near-black            */
  --ink-2:      #1f1d57;
  --panel:      #ffffff;
  --paper:      #f5f4fb;
  --saffron:    #ff8a00;
  --coral:      #ff3d77;
  --teal:       #00c2a8;
  --blue:       #4361ee;
  --violet:     #8338ec;
  --gold:       #ffd166;
  --muted:      #6c6a8a;
  --line:       #e7e5f3;
  --grad-hero:  radial-gradient(1200px 600px at 12% -10%, rgba(131,56,236,.55), transparent 60%),
                radial-gradient(900px 500px at 95% 0%, rgba(0,194,168,.45), transparent 55%),
                radial-gradient(1100px 700px at 50% 120%, rgba(255,61,119,.40), transparent 60%),
                linear-gradient(135deg, #1a1650, #221a63 45%, #14123a);
  --grad-warm:  linear-gradient(135deg, var(--saffron), var(--coral));
  --grad-cool:  linear-gradient(135deg, var(--blue), var(--teal));
  --shadow:     0 18px 50px -18px rgba(20,18,58,.45);
  --radius:     18px;
  --font-disp:  "Bricolage Grotesque", "Plus Jakarta Sans", system-ui, sans-serif;
  --font-body:  "Plus Jakarta Sans", system-ui, sans-serif;
}

* { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
}

h1,h2,h3,h4,h5,.display-font { font-family: var(--font-disp); letter-spacing:-.02em; font-weight:800; }

a { text-decoration: none; }

/* subtle dotted texture overlay on dark sections */
.dotted::before{
  content:""; position:absolute; inset:0;
  background-image: radial-gradient(rgba(255,255,255,.10) 1px, transparent 1px);
  background-size: 22px 22px; pointer-events:none; opacity:.6;
}

/* ---------- NAVBAR ---------- */
.navbar.bt-nav{
  background: rgba(20,18,58,.78);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  padding-block:.7rem;
}
.bt-brand{ font-family:var(--font-disp); font-weight:800; font-size:1.5rem; color:#fff; }
.bt-brand .dot{ color:var(--saffron); }
.bt-nav .nav-link{
  color: rgba(255,255,255,.82)!important; font-weight:600; position:relative; margin:0 .15rem;
}
.bt-nav .nav-link::after{
  content:""; position:absolute; left:.7rem; right:.7rem; bottom:.25rem; height:2px;
  background:var(--grad-warm); transform:scaleX(0); transform-origin:left; transition:transform .3s ease;
  border-radius:2px;
}
.bt-nav .nav-link:hover{ color:#fff!important; }
.bt-nav .nav-link:hover::after{ transform:scaleX(1); }

/* ---------- HERO ---------- */
.hero{
  position:relative; background:var(--grad-hero); color:#fff;
  padding: 7rem 0 8rem; overflow:hidden;
}
.hero .eyebrow{
  display:inline-block; font-weight:700; letter-spacing:.18em; text-transform:uppercase;
  font-size:.72rem; padding:.45rem .9rem; border-radius:999px;
  background:rgba(255,255,255,.10); border:1px solid rgba(255,255,255,.18); color:var(--gold);
}
.hero h1{ font-size: clamp(2.4rem, 6vw, 4.6rem); line-height:1.02; margin:1.1rem 0 1rem; }
.hero h1 .grad{
  background:linear-gradient(120deg,var(--gold),var(--saffron),var(--coral));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero p.lead{ color:rgba(255,255,255,.85); font-size:1.18rem; max-width:560px; }
.hero-stats{ display:flex; gap:2.4rem; flex-wrap:wrap; margin-top:2.2rem; }
.hero-stats .num{ font-family:var(--font-disp); font-size:2.2rem; font-weight:800;
  background:linear-gradient(120deg,var(--teal),var(--gold)); -webkit-background-clip:text; background-clip:text; color:transparent; }
.hero-stats .lbl{ color:rgba(255,255,255,.7); font-size:.85rem; }
/* floating glass cards in hero */
.hero-card{
  background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius); padding:1.1rem 1.3rem; backdrop-filter:blur(8px);
  box-shadow:0 20px 50px -20px rgba(0,0,0,.6); animation:floaty 6s ease-in-out infinite;
}
.hero-card + .hero-card{ animation-delay:-3s; }
@keyframes floaty{ 0%,100%{ transform:translateY(0) } 50%{ transform:translateY(-14px) } }

.wave{ position:absolute; left:0; right:0; bottom:-1px; line-height:0; }

/* ---------- BUTTONS ---------- */
.btn-bt{
  --b1:var(--saffron); --b2:var(--coral);
  border:0; color:#fff; font-weight:700; border-radius:999px; padding:.7rem 1.5rem;
  background:linear-gradient(135deg,var(--b1),var(--b2)); background-size:160% 160%;
  box-shadow:0 12px 28px -10px rgba(255,61,119,.7); transition:.3s ease;
}
.btn-bt:hover{ color:#fff; transform:translateY(-3px); background-position:100% 0; box-shadow:0 18px 34px -10px rgba(255,61,119,.85); }
.btn-bt.cool{ --b1:var(--blue); --b2:var(--teal); box-shadow:0 12px 28px -10px rgba(67,97,238,.7); }
.btn-bt.violet{ --b1:var(--violet); --b2:var(--blue); }
.btn-ghost{
  border:2px solid rgba(255,255,255,.5); color:#fff; font-weight:700; border-radius:999px; padding:.6rem 1.4rem;
  background:transparent; transition:.3s ease;
}
.btn-ghost:hover{ background:#fff; color:var(--ink); transform:translateY(-3px); }

/* small pill links */
.pill{
  display:inline-flex; align-items:center; gap:.4rem; font-weight:700; font-size:.85rem;
  padding:.42rem .85rem; border-radius:999px; color:#fff; transition:.25s ease; white-space:nowrap;
}
.pill:hover{ transform:translateY(-2px); filter:brightness(1.06); color:#fff; }
.pill.saffron{ background:var(--grad-warm); }
.pill.teal{ background:var(--grad-cool); }
.pill.violet{ background:linear-gradient(135deg,var(--violet),var(--coral)); }
.pill.ghost{ background:#fff; color:var(--ink)!important; border:1.5px solid var(--line); }
.pill.ghost:hover{ border-color:var(--blue); color:var(--blue)!important; }

/* ---------- SECTION HELPERS ---------- */
.section{ padding: 5rem 0; }
.kicker{ color:var(--coral); font-weight:800; text-transform:uppercase; letter-spacing:.16em; font-size:.78rem; }
.section h2{ font-size:clamp(1.8rem,4vw,2.8rem); }

/* ---------- DIRECTORY CARDS ---------- */
.filter-bar{ position:sticky; top:74px; z-index:20; }
.chip{
  border:1.5px solid var(--line); background:#fff; color:var(--ink); font-weight:700; font-size:.85rem;
  padding:.42rem .95rem; border-radius:999px; cursor:pointer; transition:.2s ease;
}
.chip:hover{ border-color:var(--blue); color:var(--blue); }
.chip.active{ background:var(--ink); color:#fff; border-color:var(--ink); }

.college-card{
  background:#fff; border:1px solid var(--line); border-radius:var(--radius); overflow:hidden;
  box-shadow:0 10px 30px -22px rgba(20,18,58,.5); transition:.32s cubic-bezier(.2,.7,.2,1); height:100%;
}
.college-card:hover{ transform:translateY(-8px); box-shadow:var(--shadow); border-color:transparent; }
.college-card .thumb{ aspect-ratio:16/9; width:100%; display:block; }
.college-card .body{ padding:1.1rem 1.2rem 1.3rem; }
.rank-badge{
  position:absolute; top:.7rem; left:.7rem; font-family:var(--font-disp); font-weight:800;
  background:rgba(20,18,58,.85); color:#fff; padding:.25rem .7rem; border-radius:999px; font-size:.8rem;
  border:1px solid rgba(255,255,255,.25);
}
.type-tag{ font-size:.7rem; font-weight:800; letter-spacing:.08em; text-transform:uppercase; }
.college-card h5{ font-size:1.05rem; line-height:1.2; margin:.35rem 0 .15rem; }
.meta{ color:var(--muted); font-size:.85rem; }

/* ---------- COLLEGE PAGE ---------- */
.cp-hero{ position:relative; color:#fff; overflow:hidden; }
.cp-hero .banner{ width:100%; height:340px; object-fit:cover; display:block; }
.cp-hero .overlay{
  position:absolute; inset:0; background:linear-gradient(180deg, rgba(20,18,58,.15), rgba(20,18,58,.88));
  display:flex; align-items:flex-end;
}
.cp-hero .overlay .inner{ padding:2rem 0; width:100%; }
.fact{
  background:#fff; border:1px solid var(--line); border-radius:14px; padding:1rem 1.1rem; height:100%;
  transition:.25s ease;
}
.fact:hover{ transform:translateY(-4px); box-shadow:var(--shadow); }
.fact .k{ font-size:.72rem; text-transform:uppercase; letter-spacing:.1em; color:var(--muted); font-weight:800; }
.fact .v{ font-family:var(--font-disp); font-weight:800; font-size:1.25rem; }

.block{ background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:1.8rem; box-shadow:0 10px 30px -24px rgba(20,18,58,.5); }
.block h3{ font-size:1.4rem; }
.icon-dot{ width:42px; height:42px; border-radius:12px; display:grid; place-items:center; color:#fff; font-size:1.1rem; flex:0 0 auto; }

/* colorful tables */
.table-bt{ border-radius:14px; overflow:hidden; border:1px solid var(--line); }
.table-bt thead th{ background:var(--ink); color:#fff; font-weight:700; border:0; }
.table-bt tbody tr:nth-child(even){ background:var(--paper); }
.table-bt td,.table-bt th{ vertical-align:middle; }
.rank-cell{ font-family:var(--font-disp); font-weight:800; }

/* branch & facility tags */
.tag{ display:inline-block; font-weight:700; font-size:.82rem; padding:.4rem .8rem; border-radius:10px; margin:.2rem; }

/* on-page sticky toc */
.toc{ position:sticky; top:90px; }
.toc a{ display:block; color:var(--muted); font-weight:600; padding:.4rem .7rem; border-left:3px solid transparent; transition:.2s; }
.toc a:hover{ color:var(--ink); border-color:var(--coral); background:var(--paper); }

/* recruiter chips */
.recruiter{ background:var(--paper); border:1px solid var(--line); border-radius:10px; padding:.45rem .8rem; font-weight:700; font-size:.85rem; }

/* ---------- FOOTER ---------- */
.bt-footer{ background:var(--ink); color:rgba(255,255,255,.75); position:relative; }
.bt-footer a{ color:rgba(255,255,255,.75); }
.bt-footer a:hover{ color:#fff; }
.bt-footer h6{ color:#fff; font-family:var(--font-disp); letter-spacing:.02em; }

/* reveal on load */
.reveal{ opacity:0; transform:translateY(24px); animation:rise .7s cubic-bezier(.2,.7,.2,1) forwards; }
@keyframes rise{ to{ opacity:1; transform:none; } }

::selection{ background:var(--coral); color:#fff; }

/* scrollbar */
::-webkit-scrollbar{ width:11px; }
::-webkit-scrollbar-thumb{ background:linear-gradient(var(--blue),var(--violet)); border-radius:99px; }