:root {
  --primary: #2563eb;       /* Modern blue */
  --primary-dark: #1e40af;  /* Deep blue */
  --accent: #3b82f6;        /* Lighter blue */
  --bg: #f8fafc;            /* Soft grey background */
  --surface: #ffffff;       /* Card / container */
  --text: #1f2937;          /* Dark grey text */
  --text-muted: #6b7280;    /* Secondary text */
  --border: #e5e7eb;        /* Light border */
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: "Inter", "Segoe UI", sans-serif;
  line-height: 1.6;
}

/* Smooth rendering */
* {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.pkp_site_name a {
  font-weight: 600;
  font-size: 1.4rem;
  color: var(--primary);
  letter-spacing: -0.3px;
}

.pkp_navigation_primary_row {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.pkp_navigation_primary_row a {
  color: var(--text-muted);
  font-weight: 500;
  transition: all 0.2s ease;
}

.pkp_navigation_primary_row a:hover {
  color: var(--primary);
}

.obj_article_summary,
.obj_issue_summary,
.block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  transition: all 0.2s ease;
}

.obj_article_summary:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.obj_article_summary .title a {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}

.obj_article_summary .title a:hover {
  color: var(--primary);
}

.obj_article_summary .meta {
  color: var(--text-muted);
  font-size: 0.9rem;
}

button,
.pkp_button,
a.pkp_button {
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  padding: 8px 16px;
  border: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

button:hover,
.pkp_button:hover {
  background: var(--primary-dark);
}

input[type="text"],
input[type="search"] {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  width: 100%;
  background: #fff;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.pkp_block {
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 16px;
}

.pkp_block h2 {
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 10px;
}

@media (max-width: 768px) {
  .obj_article_summary {
    padding: 16px;
  }

  .pkp_site_name a {
    font-size: 1.2rem;
  }
}