:root {
  --ink: #0a2c4f;
  --leaf: #2a9d8f;
  --saffron: #f4a261;
  --bg: #f7f8fb;
  --card: #ffffff;
  --muted: #667085;
  --royal: #0b2a4a;
  --ring: rgba(42, 157, 143, .22);
  --shadow: 0 10px 30px rgba(10, 44, 79, .10);
  --radius: 16px;
}

body { color: var(--ink); }

/* Hero */
.hero {
  position: relative;
  min-height: 68vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -10% -10% 0 -10%;
  background: url('/img/bg-three.jpg') center/cover no-repeat;
  transform: translateY(var(--parallax, 0px));
  will-change: transform;
  filter: contrast(1.05) saturate(1.05);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1200px 600px at 20% 20%, rgba(244, 162, 97, .25), transparent),
    linear-gradient(to bottom right, rgba(10, 44, 79, .85), rgba(42, 157, 143, .75));
}
.hero .wrap { position: relative; z-index: 2; }
.eyebrow { text-transform: uppercase; letter-spacing: .2rem; font-weight: 700; opacity: .9; }
.hero h1 {
  font-family: "Playfair Display", serif;
  font-weight: 700;
  line-height: 1.1;
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  margin: .4rem 0 1rem;
}
.hero p.lead { max-width: 720px; opacity: .95; }

/* Buttons (page tone, aligns with global colors) */
.btn-pill {
  border-radius: 999px;
  padding: .7rem 1.4rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--royal), var(--leaf));
  color: #fff !important;
  border: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .12);
  transition: transform .2s ease, box-shadow .2s ease;
}
.btn-pill:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0, 0, 0, .18); }

/* Toolbar */
.toolbar { margin-top: -36px; position: relative; z-index: 3; }
.toolbar .card { border-radius: var(--radius); border: 1px solid rgba(10, 44, 79, .06); box-shadow: var(--shadow); }
.chip {
  border: 1px solid rgba(10, 44, 79, .12);
  padding: .45rem .9rem;
  border-radius: 999px;
  font-weight: 600;
  color: var(--ink);
  background: #fff;
  cursor: pointer;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.chip.active, .chip:hover { border-color: var(--leaf); box-shadow: 0 0 0 6px var(--ring); }
.search {
  border-radius: 999px;
  padding: .65rem 1rem;
  border: 1px solid rgba(10, 44, 79, .12);
  outline: none;
  width: 100%;
}
.search:focus { border-color: var(--leaf); box-shadow: 0 0 0 6px var(--ring); }

/* Grid & Card */
.grid { padding: 60px 0; }
.teacher {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid rgba(10, 44, 79, .06);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
  transform: translateZ(0);
  transition: transform .2s ease, box-shadow .2s ease; /* faster */
}
.teacher:hover { transform: translateY(-6px); box-shadow: 0 18px 36px rgba(10, 44, 79, .16); }

.teacher .cover { position: relative; height: 220px; background: #e8f4f1; overflow: hidden; }
.teacher .cover img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  filter: saturate(1.05); transform: scale(1.02); transition: transform .3s ease;
  will-change: transform;
}
.teacher:hover .cover img { transform: scale(1.06); }

.badge-role {
  position: absolute; bottom: 12px; left: 12px;
  background: rgba(10, 44, 79, .9); color: #fff;
  padding: .35rem .7rem; border-radius: 10px; font-size: .8rem; font-weight: 700;
  box-shadow: 0 6px 16px rgba(0,0,0,.18);
}
.teacher .body { padding: 18px 18px 16px; }
.teacher h5 { font-family: "Playfair Display", serif; font-weight: 700; margin-bottom: .25rem; font-size: 1.15rem; }
.teacher .meta { color: var(--leaf); font-weight: 700; font-size: .9rem; margin-bottom: .5rem; }
.teacher .bio { color: var(--muted); font-size: .92rem; min-height: 48px; overflow: hidden; }

.teacher .social a { color: var(--ink); margin-right: 10px; opacity: .7; font-size: 1.05rem; transition: color .2s ease, opacity .2s ease; }
.teacher .social a:hover { color: var(--saffron); opacity: 1; }

/* Reveal (fast & smooth) */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .4s ease, transform .4s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* Modal */
.profile-img {
  width: 80px; height: 80px; object-fit: cover; border: 3px solid var(--leaf);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .reveal { transition: none; }
  .teacher { transition: none; }
  .teacher .cover img { transition: none; }
}