/* css/style.css */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --bg: #f8fafc;
  --text: #1e293b;
  --card: #ffffff;
  --border: #e2e8f0;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  --radius: 12px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* HEADER */
.site-header {
  background: var(--card);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary);
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
}

.main-nav a {
  text-decoration: none;
  color: var(--text);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  transition: var(--transition);
  font-weight: 500;
}

.main-nav a:hover {
  background: #f1f5f9;
  color: var(--primary);
}

/* Dropdown */
.dropdown {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--card);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  min-width: 250px;
  z-index: 1000;
  list-style: none;
  padding: 0.5rem 0;
}

.dropdown-menu li {
  padding: 0;
}

.dropdown-menu a {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text);
  text-decoration: none;
}

.dropdown-menu a:hover {
  background: #f1f5f9;
  color: var(--primary);
}

.dropdown:hover .dropdown-menu {
  display: block;
}

/* MAIN */
main {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* CARD */
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  margin: 2rem 0;
  border: 1px solid var(--border);
}

.card h2 {
  color: var(--primary);
  margin-bottom: 1rem;
  border-bottom: 2px solid #e2e8f0;
  padding-bottom: 0.5rem;
}

.card h3 {
  margin: 1rem 0 0.5rem;
  color: var(--text);
}

.card ul {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.card ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.card blockquote {
  background: #f1f5f9;
  padding: 1rem;
  border-left: 4px solid var(--primary);
  margin: 1rem 0;
  font-style: italic;
}

/* TABLE */
.card table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

.card th {
  background: #dbeafe;
  color: var(--primary);
  padding: 0.75rem;
  text-align: left;
  font-weight: 600;
}

.card td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.card tr:last-child td {
  border-bottom: none;
}

/* BUTTON */
.btn {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn:hover {
  background: var(--primary-dark);
}

/* FOOTER */
.site-footer {
  margin-top: auto;
  background: #f1f5f9;
  padding: 2rem 0;
  text-align: center;
  color: #64748b;
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .dropdown-menu {
    min-width: 100%;
  }

  .card {
    padding: 1.5rem;
  }

  main {
    padding: 0 1rem;
  }
}