/* ===== CSS Variables for Maintainability ===== */
:root {
  --primary-blue: #2563EB;
  --primary-dark: #252A41;
  --primary-hover: #032eaf;
  --text-dark: #1e293b;
  --bg-gradient-start: #eef2f3;
  --bg-gradient-end: #dbe9f4;
  --white: #ffffff;
  --gray-light: #f9fafb;
  --hover-blue: #3598da;
}

/* ===== Modern CSS Reset ===== */
html {
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit;
}

body, h1, h2, h3, p, ul, ol {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: linear-gradient(to right, var(--bg-gradient-start), var(--bg-gradient-end));
  min-height: 100vh;
  color: var(--text-dark);
  overflow-x: hidden;
}

/* ===== Main Content Wrapper ===== */
.ranking-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
}

/* ===== Section Title ===== */
.section-title {
  text-align: center;
  margin: 28px 0 20px;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-dark);
}

/* ===== Ranking Tabs ===== */
.rank-tabs {
  display: flex;
  justify-content: center;
  margin: 30px 0 20px;
  gap: 10px;
  flex-wrap: wrap;
}

.rank-tabs button {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  background: var(--primary-blue);
  color: var(--white);
  cursor: pointer;
  font-weight: bold;
  font-size: 15px;
  transition: background 0.3s ease;
}

.rank-tabs button:hover {
  background: var(--primary-hover);
}

.rank-tabs button.active {
  background: var(--primary-dark);
}

/* ===== Table Container ===== */
.table-wrapper {
  max-width: 600px;
  width: 90%;
  margin: 0 auto 60px;
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

/* ===== Ranking Table ===== */
.ranking-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  table-layout: fixed;
}

.ranking-table thead {
  background-color: var(--primary-dark);
  color: var(--white);
}

.ranking-table th, 
.ranking-table td {
  padding: 12px 15px;
  text-align: center;
}

.ranking-table th:nth-child(1),
.ranking-table td:nth-child(1) {
  width: 80px;
}

.ranking-table th:nth-child(2),
.ranking-table td:nth-child(2) {
  text-align: left;
  padding-left: 20px;
}

.ranking-table th:nth-child(3),
.ranking-table td:nth-child(3) {
  width: 100px;
  text-align: center;
  padding-right: 20px;
}

.ranking-table tr:nth-child(even) {
  background-color: var(--gray-light);
}

.ranking-table tr:hover {
  background-color: var(--hover-blue);
}

/* ===== Responsive Design ===== */
@media (min-width: 768px) {
  #footer-container {
    margin-top: auto;
  }
}

@media (max-width: 767px) {
  #footer-container {
    margin-bottom: 55px;
  }
  
  .table-wrapper {
    width: 95%;
    margin-bottom: 80px;
  }
  
  .rank-tabs {
    gap: 8px;
    margin: 20px 0 15px;
  }
  
  .rank-tabs button {
    padding: 8px 16px;
    font-size: 14px;
  }
  
  .section-title {
    font-size: 1.5rem;
    margin-top: 20px;
  }
  
  .ranking-table {
    font-size: 13px;
  }
  
  .ranking-table th, 
  .ranking-table td {
    padding: 10px 12px;
  }
}

@media (max-width: 480px) {
  .ranking-table th:nth-child(1),
  .ranking-table td:nth-child(1) {
    width: 60px;
  }
  
  .ranking-table th:nth-child(3),
  .ranking-table td:nth-child(3) {
    width: 80px;
  }
  
  .ranking-table th:nth-child(2),
  .ranking-table td:nth-child(2) {
    padding-left: 12px;
  }
}