/* ==========================================================================
   JDSTC Master Academic Design System — World-Class Scholarly Standard
   100% Crisp Light Header · High-Contrast Deep Navy Footer · Elegant Sizing
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Inter:wght@300;400;500;600;700;800&family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,600;0,8..60,700;1,8..60,400&display=swap");

:root {
  --color-primary: #0B1F3A;         /* Deep academic navy */
  --color-primary-hover: #14284A;   /* Navy hover */
  --color-secondary: #0F766E;       /* Deep science teal */
  --color-secondary-hover: #115E59; /* Teal hover */
  --color-secondary-light: #F0FDFA; /* Teal 50 */
  
  --color-accent-bg: #F59E0B;      /* Bright academic gold */
  --color-accent-hover: #D97706;   /* Gold hover */
  --color-accent-text: #0B1F3A;    /* Navy text for gold buttons */
  
  --color-success: #15803D;        /* Green 700 */
  --color-success-light: #F0FDF4;
  --color-warning: #B45309;        /* Amber 700 */
  --color-warning-light: #FFFBEB;
  --color-danger: #B91C1C;         /* Red 700 */
  --color-danger-light: #FEF2F2;
  
  --color-bg-neutral: #F6F8FA;     /* Clean off-white page background */
  --color-surface: #FFFFFF;        /* Pure white cards */
  --color-text-body: #151A21;      /* Near-black slate */
  --color-text-muted: #475569;     /* Slate 600 */
  --color-border: #E2E5EA;         /* Hairline borders */
  --color-border-hover: #CBD5E1;   /* Hover borders */
  
  --font-serif: "Source Serif 4", "Merriweather", Georgia, serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px 0 rgba(11, 31, 58, 0.05);
  --shadow-md: 0 4px 8px -1px rgba(11, 31, 58, 0.08), 0 2px 4px -2px rgba(11, 31, 58, 0.04);
  --shadow-lg: 0 12px 20px -3px rgba(11, 31, 58, 0.1), 0 4px 6px -4px rgba(11, 31, 58, 0.04);
  
  --transition: all 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   GLOBAL RESET & CONTAINER UNLOCKING
   ========================================================================== */
html, body {
  background-color: var(--color-bg-neutral) !important;
  font-family: var(--font-sans) !important;
  color: var(--color-text-body) !important;
  line-height: 1.68 !important;
  font-size: 15px !important;
  margin: 0 !important;
  padding: 0 !important;
  -webkit-font-smoothing: antialiased;
}

.pkp_structure_page {
  background: transparent !important;
  max-width: 100% !important;
  width: 100% !important;
  padding: 0 !important;
  margin: 0 !important;
  box-shadow: none !important;
  border: none !important;
}

.pkp_structure_main::before,
.pkp_structure_main::after,
.pkp_structure_content::before,
.pkp_structure_content::after {
  content: none !important;
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}

.pkp_structure_content {
  max-width: 1360px !important;
  width: 100% !important;
  margin: 2rem auto !important;
  padding: 0 2rem !important;
  box-sizing: border-box !important;
}

.pkp_structure_main {
  float: none !important;
  width: 100% !important;
  max-width: 100% !important;
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  padding: 0 !important;
  margin: 0 !important;
}

/* Typography */
h1, h2, h3 { /* Removed for inline compatibility */
  font-family: var(--font-serif);
  color: var(--color-primary) !important;
  font-weight: 700 !important;
  letter-spacing: -0.015em;
}

h4, h5, h6 {
  font-family: var(--font-sans) !important;
  color: var(--color-primary) !important;
  font-weight: 600 !important;
}

h1 { font-size: 2.25rem !important; line-height: 1.25 !important; }
h2 { font-size: 1.65rem; line-height: 1.3; }
h3 { font-size: 1.285rem !important; line-height: 1.35 !important; }

p { margin-bottom: 1.15rem !important; color: var(--color-text-body); }

a { /* removed global override */
  color: var(--color-secondary);
  text-decoration: none !important;
  transition: var(--transition) !important;
}

a:hover, a:focus {
  color: var(--color-secondary-hover) !important;
  text-decoration: underline !important;
}

/* ==========================================================================
   HEADER: PURE WHITE, PROPORTIONAL LOGO, ZERO BLUE BACKGROUND
   ========================================================================== */
.pkp_structure_head,
.pkp_head_wrapper,
.pkp_site_nav_menu,
.pkp_navigation_primary_row,
.pkp_navigation_primary_wrapper,
.pkp_navigation_user_wrapper {
  background-color: #FFFFFF !important;
  background: #FFFFFF !important;
}

.pkp_structure_head {
  border-top: 4px solid var(--color-primary) !important;
  border-bottom: 1px solid var(--color-border) !important;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04) !important;
  padding: 0.5rem 0 !important;
  width: 100% !important;
}

.pkp_head_wrapper {
  max-width: 1360px !important;
  width: 100% !important;
  margin: 0 auto !important;
  padding: 0.5rem 2rem !important;
  box-sizing: border-box !important;
  display: flex !important;
  /* flex-direction removed */
  gap: 0.5rem !important;
  position: relative !important;
}

.pkp_site_name_wrapper {
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  width: 100% !important;
  height: auto !important;
  position: static !important;
}

.pkp_site_nav_toggle {
  display: none !important;
}

/* Logo container and image */
.pkp_site_name {
  position: static !important;
  left: auto !important;
  right: auto !important;
  width: auto !important;
  height: auto !important;
  padding: 0 !important;
  margin: 0 !important;
  overflow: visible !important;
  display: flex !important;
  align-items: center !important;
}

.pkp_site_name .is_img {
  display: flex !important;
  align-items: center !important;
  margin: 0 !important;
  padding: 0 !important;
}

.pkp_site_name .is_img img {
  height: 58px !important;
  max-height: 58px !important;
  width: auto !important;
  display: block !important;
  object-fit: contain !important;
  filter: none !important;
}

.pkp_site_name .is_text {
  font-family: var(--font-serif);
  color: var(--color-primary) !important;
  font-size: 1.3rem !important;
  font-weight: 700 !important;
}

/* User Register/Login Links (Top Right) */
.pkp_navigation_user_wrapper {
  position: static !important;
  display: flex !important;
  align-items: center !important;
  justify-content: flex-end !important;
}

.pkp_navigation_user > li > a { /* removed global override */
  color: var(--color-primary) !important;
  font-size: 0.85rem !important;
  font-weight: 600 !important;
  padding: 0.4rem 0.75rem !important;
  border-radius: var(--radius-sm) !important;
  transition: var(--transition) !important;
}

.pkp_navigation_user > li > a:hover {
  color: var(--color-secondary);
  background-color: var(--color-secondary-light) !important;
  text-decoration: none !important;
}

/* Primary Navigation Row */
.pkp_navigation_primary_row {
  border-top: 1px solid var(--color-border) !important;
  padding: 0.4rem 0 0 0 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  width: 100% !important;
  margin: 0 !important;
}

.pkp_navigation_primary > li > a { /* removed global override */
  color: var(--color-primary) !important;
  font-family: var(--font-sans) !important;
  font-weight: 600 !important;
  font-size: 0.9rem !important;
  padding: 0.5rem 0.9rem !important;
  border-radius: var(--radius-sm) !important;
  transition: var(--transition) !important;
}

.pkp_navigation_primary > li > a:hover {
  color: var(--color-secondary);
  background-color: var(--color-secondary-light) !important;
  text-decoration: none !important;
}

/* Dropdown Menus */
.pkp_nav_list ul {
  background-color: #FFFFFF !important;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--shadow-lg) !important;
  border: 1px solid var(--color-border) !important;
  padding: 0.5rem 0 !important;
  min-width: 250px !important;
}

.pkp_nav_list ul li a { /* removed global override */
  color: var(--color-text-body) !important;
  padding: 0.6rem 1.25rem !important;
  font-size: 0.885rem !important;
  font-weight: 500 !important;
  transition: var(--transition) !important;
  display: block !important;
  border-left: 3px solid transparent;
}

.pkp_nav_list ul li a:hover {
  background-color: var(--color-secondary-light) !important;
  color: var(--color-secondary-hover) !important;
  border-left-color: var(--color-secondary);
  text-decoration: none !important;
}

.pkp_navigation_search_wrapper .pkp_search {
  color: var(--color-primary) !important;
  font-size: 0.885rem !important;
  font-weight: 600 !important;
}

/* ==========================================================================
   HOMEPAGE HERO SECTION
   ========================================================================== */
.jdstc-hero {
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 3.5rem 3rem;
  color: #FFFFFF;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
}

.jdstc-hero h1 {
  font-family: var(--font-serif);
  color: #FFFFFF !important;
  font-size: 2.35rem !important;
  font-weight: 700 !important;
  margin: 0 0 0.85rem 0 !important;
  line-height: 1.25 !important;
}

.jdstc-hero-lead {
  font-size: 1.05rem !important;
  color: #E2E8F0 !important;
  max-width: 920px;
  line-height: 1.68 !important;
  margin-bottom: 2rem !important;
}

.jdstc-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.35rem;
}

.jdstc-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.jdstc-badge-navy {
  background: rgba(255, 255, 255, 0.12);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.jdstc-badge-teal {
  background: rgba(15, 118, 110, 0.35);
  color: #5EEAD4;
  border: 1px solid rgba(94, 234, 212, 0.5);
}

.jdstc-badge-gold {
  background: rgba(245, 158, 11, 0.25);
  color: #FCD34D;
  border: 1px solid rgba(245, 158, 11, 0.5);
}

.jdstc-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.jdstc-btn-gold {
  background-color: var(--color-accent-bg) !important;
  color: var(--color-accent-text) !important;
  padding: 0.8rem 1.75rem !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 700 !important;
  font-size: 0.95rem !important;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.25) !important;
  transition: var(--transition) !important;
  display: inline-flex !important;
  align-items: center !important;
  text-decoration: none !important;
}

.jdstc-btn-gold:hover {
  background-color: #FBBF24 !important;
  color: var(--color-accent-text) !important;
  text-decoration: none !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3) !important;
}

.jdstc-btn-outline {
  background: transparent !important;
  color: #FFFFFF !important;
  border: 1px solid rgba(255, 255, 255, 0.35) !important;
  padding: 0.8rem 1.5rem !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 600 !important;
  font-size: 0.925rem !important;
  transition: var(--transition) !important;
  display: inline-flex !important;
  align-items: center !important;
}

.jdstc-btn-outline:hover {
  background: rgba(255, 255, 255, 0.15) !important;
  border-color: #FFFFFF !important;
  color: #FFFFFF !important;
  text-decoration: none !important;
}

/* ==========================================================================
   4 STAT TILES & 5 RESEARCH PILLARS
   ========================================================================== */
.jdstc-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.25rem;
  margin: 2.5rem 0;
}

.jdstc-stat-tile {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.jdstc-stat-tile::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--color-primary);
}

.jdstc-stat-tile:nth-child(2)::before { background-color: var(--color-success); }
.jdstc-stat-tile:nth-child(3)::before { background-color: var(--color-secondary); }
.jdstc-stat-tile:nth-child(4)::before { background-color: #6366F1; }

.jdstc-stat-tile:hover {
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.jdstc-stat-value {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.jdstc-stat-label {
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.jdstc-stat-desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.35rem;
}

.jdstc-pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.35rem;
  margin: 1.5rem 0 2.75rem 0;
}

.jdstc-pillar-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.jdstc-pillar-card:hover {
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.jdstc-pillar-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.jdstc-pillar-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--color-secondary-light);
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: bold;
}

.jdstc-pillar-card h4 {
  margin: 0 !important;
  color: var(--color-primary) !important;
  font-size: 1.1rem !important;
}

.jdstc-pillar-card p {
  font-size: 0.9rem !important;
  color: var(--color-text-muted) !important;
  line-height: 1.58 !important;
  margin: 0 0 1.15rem 0 !important;
  flex-grow: 1;
}

.jdstc-pillar-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-secondary);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.jdstc-pillar-link:hover {
  color: var(--color-secondary-hover) !important;
}

.jdstc-indexing-strip {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 2.25rem;
  margin: 2.75rem 0;
  box-shadow: var(--shadow-sm);
}

.jdstc-strip-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.15rem;
}

.jdstc-index-badge {
  background-color: var(--color-bg-neutral);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.95rem;
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--color-text-body);
}

.jdstc-dot-active {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-success);
}

.jdstc-dot-track {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-secondary);
}

/* ==========================================================================
   ACADEMIC PUBLISHER FOOTER & OJS LOGO SIZING
   ========================================================================== */
.pkp_structure_footer_wrapper {
  background-color: var(--color-primary) !important;
  width: 100% !important;
  margin-top: 4rem !important;
}

.pkp_structure_footer {
  background-color: var(--color-primary) !important;
  color: #CBD5E1 !important;
  border-top: 3px solid var(--color-secondary) !important;
  padding: 3.5rem 0 2rem 0 !important;
  font-size: 0.875rem !important;
  width: 100% !important;
}

.pkp_footer_content {
  max-width: 1360px !important;
  margin: 0 auto !important;
  padding: 0 2rem !important;
  box-sizing: border-box !important;
}

.jdstc-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  text-align: left;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.jdstc-footer-col h5 {
  color: #FFFFFF !important;
  font-size: 0.9rem !important;
  font-weight: 700 !important;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 1.15rem 0 !important;
}

.jdstc-footer-col p {
  color: #CBD5E1 !important;
  font-size: 0.875rem !important;
  line-height: 1.65 !important;
}

.jdstc-footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.jdstc-footer-col ul li {
  margin-bottom: 0.65rem;
}

.jdstc-footer-col ul li a { /* removed global override */
  color: #5EEAD4 !important;
  font-size: 0.875rem !important;
  font-weight: 500 !important;
  transition: var(--transition) !important;
}

.jdstc-footer-col ul li a:hover {
  color: #FFFFFF !important;
  text-decoration: underline !important;
}

.jdstc-footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: #94A3B8;
  margin-top: 1.5rem;
}

.jdstc-footer-bottom a { /* removed global override */
  color: #5EEAD4 !important;
}

/* OJS / PKP Brand Footer Logo sizing fix */
.pkp_brand_footer {
  text-align: center !important;
  margin: 1.5rem auto 0 auto !important;
  padding-top: 1.5rem !important;
  border-top: 1px solid rgba(255, 255, 255, 0.1) !important;
  max-width: 1360px !important;
}

.pkp_brand_footer a { /* removed global override */
  display: inline-block !important;
  opacity: 0.75 !important;
  transition: opacity 0.2s ease !important;
}

.pkp_brand_footer a:hover {
  opacity: 1 !important;
}

.pkp_brand_footer img {
  height: 28px !important;
  max-height: 28px !important;
  width: auto !important;
  display: inline-block !important;
  filter: brightness(0) invert(1) !important;
}

/* ==========================================================================
   MOBILE BREAKPOINTS
   ========================================================================== */
@media (max-width: 768px) {
  .jdstc-footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .pkp_head_wrapper {
    padding: 0.5rem 1rem !important;
  }
  .pkp_structure_content {
    padding: 0 1rem !important;
    margin: 1.25rem auto !important;
  }
  .pkp_site_name .is_img img {
    height: 44px !important;
    max-height: 44px !important;
  }
  .jdstc-hero {
    padding: 2.25rem 1.5rem;
    border-radius: var(--radius-md);
  }
  .jdstc-hero h1 {
    font-size: 1.75rem !important;
  }
  .jdstc-hero-lead {
    font-size: 0.95rem !important;
  }
  .jdstc-hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .jdstc-btn-gold,
  .jdstc-btn-outline {
    width: 100% !important;
    justify-content: center !important;
    box-sizing: border-box !important;
  }
  .jdstc-stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }
  .jdstc-pillars-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .jdstc-footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  .jdstc-stats-grid {
    grid-template-columns: 1fr;
  }
}

/* Tailwind Design System Utilities */
.hover-shadow-card:hover {
  box-shadow: 0 8px 30px rgba(0,0,0,0.04) !important;
}

@media (max-width: 768px) {
  .metric-grid-custom {
    grid-template-columns: 1fr 1fr !important;
  }
  .metric-col {
    border-right: none !important;
    border-bottom: 1px solid #c4c6ce !important;
    padding-bottom: 1rem !important;
  }
  .metric-col-last {
    padding-bottom: 1rem !important;
  }
}

@media (max-width: 768px) {
  .mdpi-3col-grid {
    grid-template-columns: 1fr !important;
    gap: 2rem !important;
  }
  .hero-crest-wrapper {
    display: none !important;
  }
}

@media (max-width: 768px) {
  .hero-crest-wrapper { display: none !important; }
}

@media (max-width: 768px) {
  .mdpi-3col-grid {
    grid-template-columns: 1fr !important;
    gap: 2rem !important;
  }
  .pkp_head_wrapper {
    flex-wrap: wrap !important;
  }
  .pkp_site_name_wrapper {
    width: 100% !important;
    justify-content: center !important;
    margin-bottom: 1rem !important;
  }
}

/* --- MDPI Header Layout Fixes --- */
@media (min-width: 769px) {
  .pkp_head_wrapper {
    flex-direction: row !important;
    align-items: center !important;
    justify-content: space-between !important;
    flex-wrap: nowrap !important;
  }
  .pkp_site_name_wrapper {
    width: auto !important;
    flex: 0 0 auto !important;
    margin: 0 !important;
  }
  .pkp_site_nav_menu {
    flex: 1 1 auto !important;
    display: flex !important;
    justify-content: center !important;
    margin: 0 2rem !important;
  }
  .pkp_navigation_primary_row {
    width: auto !important;
    border: none !important;
    padding: 0 !important;
    justify-content: center !important;
  }
  .pkp_navigation_primary {
    justify-content: center !important;
    flex-wrap: nowrap !important;
  }
}

/* Fix mobile stacking */
@media (max-width: 768px) {
  .pkp_head_wrapper {
    /* flex-direction removed */
    align-items: center !important;
    gap: 1rem !important;
  }
  .pkp_site_name_wrapper {
    margin: 0 auto !important;
  }
  .pkp_site_nav_menu {
    width: 100% !important;
  }
  .pkp_navigation_primary {
    justify-content: center !important;
    flex-wrap: wrap !important;
    row-gap: 0.5rem !important;
  }
  .pkp_navigation_primary_row {
    border-top: none !important;
  }
  .header-actions-right {
    margin: 0 auto !important;
    justify-content: center !important;
  }
}

/* Safely target content links without breaking the footer/header */
.pkp_structure_main a {
  color: var(--color-secondary);
  text-decoration: none;
}
.pkp_structure_main a:hover {
  text-decoration: underline;
}