/* ==========================================================================
   ESSCA-DC.org - Modern Layout & Theme Stylesheet
   Inspired by winalldatnet.ivdk.org architecture with ESSCA EU Blue & Gold theme
   ========================================================================== */

:root {
  /* ESSCA European Blue & Gold Brand Colors */
  --primary-dark: #0C1E36;
  --primary-navy: #132E58;
  --primary-deep: #193D8A;
  --primary-blue: #1D4ED8;
  --accent-blue: #2563EB;
  --accent-light: #3B82F6;
  --accent-sky: #60A5FA;
  
  /* EU Star Gold Accent */
  --accent-gold: #F59E0B;
  --accent-amber: #D97706;
  --accent-gold-soft: #FEF3C7;
  --accent-gold-border: #FDE68A;

  /* Surfaces & Backgrounds */
  --bg-gradient-start: #F8FAFC;
  --bg-gradient-end: #EEF4FA;
  --card-bg: rgba(255, 255, 255, 0.98);
  
  /* Slate Neutrals */
  --slate-50: #F8FAFC;
  --slate-100: #F1F5F9;
  --slate-200: #E2E8F0;
  --slate-300: #CBD5E1;
  --slate-400: #94A3B8;
  --slate-500: #64748B;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1E293B;
  --slate-900: #0F172A;

  /* Bootstrap Variable Overrides */
  --bs-primary: #193D8A;
  --bs-primary-rgb: 25, 61, 138;
  --bs-link-color: #1D4ED8;
  --bs-link-hover-color: #0C1E36;
}

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

html {
  height: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: #ffffff;
  color: var(--slate-700);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Site Header (Top Bar + Main Navigation)
   ========================================================================== */

.site-header {
  width: 100%;
  background: #ffffff;
  border-bottom: 1px solid var(--slate-200);
  position: sticky;
  top: 0;
  z-index: 1030;
  box-shadow: 0 2px 4px 0 rgba(12, 30, 54, 0.04);
}

.top-bar {
  background: var(--primary-dark);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.45rem 1rem;
}

.top-bar-inner {
  max-width: 80rem;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.top-bar-title {
  color: #E2E8F0;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.top-bar-title .gold-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background-color: var(--accent-gold);
  border-radius: 50%;
}

.top-bar-links {
  display: flex;
  gap: 1.25rem;
}

.top-bar-links a {
  color: #CBD5E1;
  text-decoration: none;
  transition: color 0.2s;
  font-size: 0.72rem;
}

.top-bar-links a:hover {
  color: var(--accent-gold);
}

.header-main {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
}

.header-brand-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
}

.header-brand-logo {
  height: 3.5rem;
  width: auto;
  object-fit: contain;
  transition: transform 0.2s ease;
}

.header-brand-wrap:hover .header-brand-logo {
  transform: scale(1.02);
}

.header-brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary-navy);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0;
}

.brand-subtitle {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--slate-500);
  margin: 0;
  line-height: 1.3;
}

/* Main Navigation Links (winalldatnet.ivdk.org style) */
.essca-navbar .navbar-nav {
  gap: 0.35rem;
}

@media (min-width: 992px) {
  .essca-navbar .navbar-nav {
    gap: 1.25rem;
  }
}

.essca-navbar .nav-link {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--slate-600);
  padding: 0.5rem 0.35rem !important;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  text-decoration: none;
}

.essca-navbar .nav-link:hover,
.essca-navbar .nav-link:focus {
  color: var(--primary-blue);
  border-bottom-color: rgba(29, 78, 216, 0.4);
}

.essca-navbar .nav-link.active {
  color: var(--primary-deep);
  border-bottom-color: var(--accent-gold);
}

.essca-navbar .navbar-toggler {
  border: 1px solid var(--slate-200);
  padding: 0.4rem 0.65rem;
  color: var(--primary-navy);
}

.essca-navbar .navbar-toggler:focus {
  box-shadow: 0 0 0 0.2rem rgba(25, 61, 138, 0.15);
}

/* ==========================================================================
   Page Canvas & Cards Layout
   ========================================================================== */

.page-wrapper {
  flex: 1 0 auto;
  min-height: 70vh;
  background: linear-gradient(180deg, var(--bg-gradient-start) 0%, #FFFFFF 60%, var(--bg-gradient-end) 100%);
  padding: 2.25rem 1rem 3.5rem;
}

.content-container {
  max-width: 80rem;
  margin: 0 auto;
}

/* Elevated Main Card with Signature Accent Bar */
.essca-main-card {
  background: var(--card-bg);
  border: 1px solid var(--slate-200);
  border-radius: 1rem;
  box-shadow: 0 4px 10px -2px rgba(12, 30, 54, 0.05), 0 2px 4px -2px rgba(12, 30, 54, 0.03);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.accent-bar {
  height: 8px;
  width: 100%;
  background: linear-gradient(90deg, var(--primary-deep) 0%, var(--accent-blue) 55%, var(--accent-gold) 100%);
}

.essca-card-body {
  padding: 2rem 1.5rem;
}

@media (min-width: 768px) {
  .essca-card-body {
    padding: 2.75rem 2.75rem;
  }
}

/* Overline Badge & Page Title */
.category-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--primary-blue);
  background-color: #EFF6FF;
  border: 1px solid #DBEAFE;
  padding: 0.2rem 0.65rem;
  border-radius: 0.375rem;
  margin-bottom: 0.75rem;
}

.category-badge.gold {
  color: var(--accent-amber);
  background-color: var(--accent-gold-soft);
  border-color: var(--accent-gold-border);
}

.page-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--primary-navy);
  line-height: 1.25;
  margin-bottom: 1.25rem;
}

@media (min-width: 768px) {
  .page-title {
    font-size: 2.25rem;
  }
}

.section-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary-navy);
  margin-top: 2rem;
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 3.5rem;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-gold));
  border-radius: 2px;
}

/* Feature & Content Sub-Cards */
.sub-card {
  background: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: 0.75rem;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.sub-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px -2px rgba(12, 30, 54, 0.06);
}

.sub-card.highlight {
  border-left: 4px solid var(--primary-blue);
  background: linear-gradient(135deg, #F8FAFC 0%, #FFFFFF 100%);
}

.feature-list {
  list-style: none;
  padding-left: 0;
}

.feature-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.85rem;
}

.feature-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--primary-blue);
  font-weight: bold;
}

/* ==========================================================================
   Sidebar Cards
   ========================================================================== */

.sidebar-card {
  background: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: 0.875rem;
  box-shadow: 0 2px 6px -1px rgba(12, 30, 54, 0.04);
  margin-bottom: 1.5rem;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.sidebar-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px -2px rgba(12, 30, 54, 0.08);
}

.sidebar-card-header {
  background: var(--slate-50);
  border-bottom: 1px solid var(--slate-200);
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.sidebar-card-header h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary-navy);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0;
}

.sidebar-card-header .header-icon {
  color: var(--accent-gold);
  font-size: 1.1rem;
}

.sidebar-card-body {
  padding: 1.25rem;
}

.sidebar-card-body p {
  font-size: 0.925rem;
  color: var(--slate-700);
  margin-bottom: 0.75rem;
}

.contact-meta {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--slate-600);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--primary-blue);
  text-decoration: none;
  transition: color 0.2s;
  word-break: break-all;
}

.contact-link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.sidebar-links-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
}

.sidebar-links-list li {
  margin-bottom: 0.6rem;
}

.sidebar-links-list li:last-child {
  margin-bottom: 0;
}

.sidebar-link-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: 0.5rem;
  color: var(--primary-navy);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.sidebar-link-item:hover {
  background: #EFF6FF;
  border-color: #BFDBFE;
  color: var(--primary-blue);
  padding-left: 0.9rem;
}

/* ==========================================================================
   Buttons & Action Controls
   ========================================================================== */

.btn {
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.5rem 1.15rem;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-essca-primary {
  background-color: var(--primary-deep);
  border: 1px solid var(--primary-deep);
  color: #ffffff;
}

.btn-essca-primary:hover,
.btn-essca-primary:focus {
  background-color: var(--primary-navy);
  border-color: var(--primary-navy);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-essca-gold {
  background-color: var(--accent-gold);
  border: 1px solid var(--accent-gold);
  color: #ffffff;
}

.btn-essca-gold:hover,
.btn-essca-gold:focus {
  background-color: var(--accent-amber);
  border-color: var(--accent-amber);
  color: #ffffff;
}

.btn-essca-soft {
  background-color: #EFF6FF;
  border: 1px solid #BFDBFE;
  color: var(--primary-deep);
}

.btn-essca-soft:hover,
.btn-essca-soft:focus {
  background-color: #DBEAFE;
  border-color: #93C5FD;
  color: var(--primary-navy);
}

/* ==========================================================================
   Tables
   ========================================================================== */

.table-essca {
  width: 100%;
  margin-bottom: 0;
  color: var(--slate-700);
  border-color: var(--slate-200);
}

.table-essca thead th {
  background-color: var(--slate-100);
  color: var(--primary-navy);
  font-weight: 700;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid #BFDBFE;
  padding: 0.85rem 1rem;
}

.table-essca tbody td {
  padding: 0.75rem 1rem;
  vertical-align: middle;
  border-bottom-color: var(--slate-100);
}

.table-essca tbody tr:hover > * {
  background-color: #EFF6FF;
  color: var(--primary-navy);
}

/* ==========================================================================
   Accordion / Legal Collapsible (Impressum & GDPR)
   ========================================================================== */

.essca-accordion .accordion-item {
  border: 1px solid var(--slate-200);
  border-radius: 0.65rem;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.essca-accordion .accordion-button {
  background-color: var(--slate-50);
  color: var(--primary-navy);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 1rem 1.25rem;
  box-shadow: none;
}

.essca-accordion .accordion-button:not(.collapsed) {
  background-color: #EFF6FF;
  color: var(--primary-deep);
  border-bottom: 1px solid #BFDBFE;
}

.essca-accordion .accordion-button:focus {
  box-shadow: 0 0 0 0.2rem rgba(25, 61, 138, 0.1);
}

.essca-accordion .accordion-body {
  padding: 1.25rem 1.5rem;
  font-size: 0.925rem;
  line-height: 1.65;
  color: var(--slate-700);
  background: #ffffff;
}

/* ==========================================================================
   Site Footer
   ========================================================================== */

.site-footer {
  background: var(--primary-dark);
  color: #ffffff;
  border-top: 1px solid var(--slate-800);
  padding: 2.5rem 1rem;
  position: relative;
  width: 100%;
  margin-top: auto;
}

.footer-inner {
  max-width: 80rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.footer-brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
}

.footer-brand-sub {
  font-size: 0.8125rem;
  color: #94A3B8;
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
}

.footer-links a {
  color: #CBD5E1;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent-gold);
}

.footer-copy {
  font-size: 0.8125rem;
  color: #64748B;
  margin-top: 0.5rem;
}

.footer-logo-wrap {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.4rem 0.85rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-logo-wrap img {
  height: 2.5rem;
  width: auto;
}