/* ===========================================================
   ExamVibe | Explanation Page - Premium Style (v2)
   Designed for clarity, focus & readability
=========================================================== */

:root {
  --primary: #0066ff;
  --primary-dark: #004bcc;
  --success: #2ecc71;
  --light-bg: #f5f7fa;
  --gradient: linear-gradient(135deg, #007bff, #00c6ff);
  --radius: 14px;
  --text: #1f1f1f;
  --shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
  --font: 'Poppins', 'Inter', sans-serif;
}

/* ===== Global ===== */
body {
  font-family: var(--font);
  background: var(--light-bg);
  margin: 0;
  padding: 0;
  color: var(--text);
}

/* ===== Page Container ===== */
.explain-container {
  max-width: 1000px;
  margin: 60px auto;
  padding: 35px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.explain-container::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(0, 123, 255, 0.08);
  z-index: 0;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  font-size: 14px;
  margin-bottom: 25px;
  position: relative;
  z-index: 1;
}
.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}
.breadcrumb a:hover {
  text-decoration: underline;
}
.breadcrumb span {
  color: #555;
}

/* ===== Question Heading ===== */
.explain-box h1 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 20px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.4;
}

/* ===== Options ===== */
ul.options {
  list-style: none;
  padding: 0;
  margin-bottom: 25px;
}
ul.options li {
  background: #f9fafb;
  padding: 14px 18px;
  border-radius: 12px;
  margin-bottom: 12px;
  font-size: 16px;
  transition: all 0.25s ease;
  border: 1px solid #eee;
  position: relative;
}
ul.options li:hover {
  background: #eef5ff;
  border-color: var(--primary);
  transform: translateX(3px);
}
ul.options li.correct {
  background: #d9fdd9;
  border-left: 6px solid var(--success);
  font-weight: 600;
  box-shadow: 0 0 8px rgba(46, 204, 113, 0.4);
  transform: scale(1.02);
}

/* ===== Explanation Box ===== */
.explanation {
  background: #f2f6ff;
  border-left: 5px solid var(--primary);
  border-radius: 10px;
  padding: 18px 22px;
  font-size: 15px;
  line-height: 1.7;
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.07);
  position: relative;
  z-index: 1;
}
.explanation strong {
  color: var(--primary-dark);
}

/* ===== Tags ===== */
.tags {
  margin: 25px 0;
  font-size: 14px;
}
.tags a {
  display: inline-block;
  background: var(--gradient);
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  margin-right: 8px;
  text-decoration: none;
  font-weight: 500;
  box-shadow: 0 3px 10px rgba(0, 123, 255, 0.2);
}
.tags a:hover {
  background: var(--primary-dark);
}

/* ===== Navigation Buttons ===== */
.navigation {
  display: flex;
  justify-content: space-between;
  margin: 30px 0;
}
.navigation a {
  text-decoration: none;
  color: #fff;
  padding: 10px 20px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  transition: 0.3s;
  background: var(--gradient);
  box-shadow: 0 3px 10px rgba(0, 123, 255, 0.25);
}
.navigation a:hover {
  transform: scale(1.05);
  background: var(--primary-dark);
}

/* ===== Related Questions ===== */
.related-questions {
  margin-top: 35px;
}
.related-questions h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 15px;
}
.related-questions ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.related-questions ul li {
  background: #f8f9fb;
  border-radius: 10px;
  flex: 1 1 calc(48% - 10px);
  padding: 12px 15px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: 0.3s;
}
.related-questions ul li:hover {
  transform: translateY(-3px);
  background: #eef4ff;
}
.related-questions ul li a {
  text-decoration: none;
  color: var(--primary);
  font-weight: 500;
}

/* ===== Explore More ===== */
.explore-more {
  margin-top: 40px;
}
.explore-more h4 {
  font-size: 18px;
  margin-bottom: 10px;
}
.subcategories-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.subcategories-list li a {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 8px 15px;
  border-radius: 8px;
  font-size: 14px;
  text-decoration: none;
  font-weight: 500;
  transition: 0.3s;
}
.subcategories-list li a:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* ===== Floating Accent Circle ===== */
.explain-container::after {
  content: "";
  position: absolute;
  bottom: -50px;
  left: -50px;
  width: 180px;
  height: 180px;
  background: rgba(0, 102, 255, 0.05);
  border-radius: 50%;
  z-index: 0;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .explain-container {
    padding: 20px;
    margin: 20px;
  }
  .explain-box h1 {
    font-size: 22px;
  }
  .navigation {
    flex-direction: column;
    gap: 10px;
  }
  .navigation a {
    text-align: center;
  }
  .related-questions ul li {
    flex: 1 1 100%;
  }
}