/* RESET */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background: #f4f7fb;
  color: #0f172a;
}

/* CONTAINER */
.container {
  width: min(1100px, 92%);
  margin: auto;
}

/* =========================
   NAVBAR - CLEAN MODERN
========================= */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;

  background: #ffffff;
  border-bottom: 1px solid #e2e8f0;
}

/* FLEX STRUCTURE */
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 65px;
}

/* LOGO */
.logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: #0f172a;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* NAV RIGHT */
.nav-links {
  display: flex;
  align-items: center;
  gap: 25px;
  list-style: none;
}

/* REMOVE UNDERLINE */
.nav-links a {
  text-decoration: none !important;   /* 🔥 important */
  border-bottom: none !important;
  color: #475569;
  font-weight: 600;
  font-size: 0.95rem;
  transition: 0.3s;
}

/* SIMPLE HOVER (NO LINE) */
.nav-links a:hover {
  color: #2563eb;
}

/* ACTIVE LINK */
.nav-links .active {
  color: #2563eb;
}

/* BUTTON STYLE */
.nav-btn {
  background: #2563eb;
  color: #fff !important;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  transition: 0.3s;
}

.nav-btn:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
}

/* MOBILE */
@media (max-width: 700px) {

  .nav-links {
    gap: 12px;
  }

  .logo {
    font-size: 1rem;
  }

  .nav-btn {
    padding: 5px 10px;
    font-size: 0.7rem;
  }
}
/* HERO */
.subject-hero {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}

.subject-hero h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.subject-hero p {
  color: #cbd5e1;
}

/* SECTION */
.section {
  padding: 60px 0;
}

/* GRID */
.subject-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* CARD */
.subject-card {
  background: #fff;
  padding: 25px;
  border-radius: 18px;
  text-align: center;
  box-shadow: 0 10px 25px rgba(0,0,0,0.06);
  transition: 0.3s;
}

.subject-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 35px rgba(0,0,0,0.1);
}

/* ICON */
.subject-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

/* TEXT */
.subject-card h3 {
  margin-bottom: 8px;
}

.subject-card p {
  font-size: 0.9rem;
  color: #64748b;
  margin-bottom: 15px;
}

/* BUTTON */
.subject-card a {
  display: inline-block;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #fff;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  text-decoration: none;
  transition: 0.3s;
}

.subject-card a:hover {
  transform: scale(1.05);
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .subject-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .subject-grid {
    grid-template-columns: 1fr;
  }

  .subject-hero h1 {
    font-size: 1.8rem;
  }
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: #0f172a;
}

.logo img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}