/* ================= GLOBAL ================= */
body, html {
  margin: 0;
  padding: 0;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  background-color: #ffffff;
  color: #333333;
}

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

/* ================= WRAPPER ================= */
.study-wrapper {
  width: 95%;
  max-width: 1200px;
  margin: 7px auto;
  padding: 20px 0;
}

/* ================= TOP BAR / TABS ================= */
.study-topbar {
  display: flex;
  justify-content: center;
  margin-bottom: 35px;
  margin-top: 10px;
}

.study-tabs {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 8px 18px;
  background-color: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-weight: 500;
  color: #333333;
  transition: all 0.3s ease;
}

.tab-btn:hover {
  background-color: #eaeaea;
  box-shadow: 0px 2px 8px rgba(0,0,0,0.1);
}

.tab-btn.active {
  background-color: #333333;
  color: #ffffff;
  border-color: #333333;
}

/* ================= HEADER ================= */
.study-header {
  text-align: center;
  margin-bottom: 25px;
  margin-top: 5px;
}

.study-title {
  font-size: 1.8rem;
  margin: 0;
  font-weight: 600;
}

.header-separator {
  width: 60px;
  height: 3px;
  background-color: #333333;
  margin: 10px auto 15px auto;
  border: none;
  border-radius: 2px;
}

.study-subtitle {
  font-size: 1rem;
  color: #555555;
  margin-bottom: 10px;
}

.study-quote {
  font-size: 0.95rem;
  font-style: italic;
  color: #777777;
  margin-top: 20px;
}

/* ================= CONTENT ================= */
.study-content {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  flex-direction: column;
  gap: 30px; /* Space between sections and topic details */
}

.topic-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.topic-chip {
  display: inline-block;
  padding: 8px 16px;
  background-color: #f5f5f5;
  color: #333333;
  font-size: 0.9rem;
  border-radius: 6px;
  border: 1px solid #ddd;
  transition: all 0.2s ease;
}

.topic-chip:hover {
  background-color: #eaeaea;
  box-shadow: 0px 2px 6px rgba(0,0,0,0.1);
}

.topic-chip.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.topic-chip.active {
  background-color: #333333;
  color: #fff;
  border-color: #333333;
}

/* ================= COMING SOON ================= */
.coming-soon {
  font-size: 1rem;
  color: #999999;
  text-align: center;
  padding: 20px;
  font-style: italic;
}

/* ================= PAGE END SEPARATOR ================= */
.page-end-line {
  width: 70%;
  height: 5px;
  background: linear-gradient(
    to right,
    transparent,
    #333333,
    transparent
  );
  margin: 60px auto 15px auto; /* 60px before, 15px after */
  border-radius: 4px;
}


/* ================= RESPONSIVE ================= */
@media (max-width: 768px) {
  .study-tabs {
    gap: 10px;
    flex-wrap: wrap;
  }

  .tab-btn {
    padding: 6px 14px;
    font-size: 0.9rem;
  }

  .study-title {
    font-size: 1.5rem;
  }

  .topic-chip {
    padding: 6px 12px;
    font-size: 0.85rem;
  }
}