html { 
    font-size: 14px; 
  overflow-x: hidden;
    position: relative;
    min-height: 100%;
}

@media (min-width: 768px) { 
    html { font-size: 16px; } 
}

:root {
  /* Updated darker bluish primary palette */
  --bs-primary: #0a4f9c; /* new primary */
  --bs-primary-rgb: 10,79,156;
  --bs-primary-dark: #063a74; /* deeper shade for gradients */
  --brand-gradient: linear-gradient(90deg,#0a4f9c,#1870d5);
  --radius-sm: .35rem;
  --radius: .75rem;
  --radius-lg: 1.25rem;
  --shadow-sm: 0 2px 4px rgba(0,0,0,.05);
  --shadow: 0 4px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 28px rgba(0,0,0,.12);
}

/* Hamburger toggler visibility */
.navbar-toggler { border:none; padding:.4rem .6rem; }
.navbar-toggler:focus { box-shadow:0 0 0 .15rem rgba(var(--bs-primary-rgb),.4); }
.navbar-toggler-icon { background-repeat:no-repeat; background-position:center; background-size:100% 100%; width:1.5em; height:1.5em; transition:filter .25s; background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%230a4f9c' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E"); }
[data-theme='dark'] .navbar-toggler-icon { background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%23ffffff' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E"); }

body { 
    margin: 0; 
    font-family: 'Inter', system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif; 
    background: var(--body-bg,#f7f9fc); 
 color: var(--body-fg,#1f2d3d); 
    line-height: 1.5; 
    -webkit-font-smoothing: antialiased; 
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

body.app-shell { 
    display: flex; 
    flex-direction: column; 
    min-height: 100vh; 
}

[data-theme="dark"] { 
    --body-bg: #0f141a; 
    --body-fg: #d5dce3; 
    --surface: #1b2631; 
    --surface-alt: #223244; 
    --border-color: #2f4254; 
    --muted: #8aa1b5; 
    background: #0f141a; 
    color: #d5dce3; 
}

.app-content-wrapper { 
    flex: 1 0 auto; /* ? Assicura che il contenuto spinge il footer in basso */
}

.app-footer {
    flex-shrink: 0; /* ? Previene che il footer si comprima */
    background: linear-gradient(to right, rgba(var(--bs-primary-rgb),.06), rgba(var(--bs-primary-rgb),.12));
}

[data-theme="dark"] .app-footer { 
    background: #111b24; 
}

/* Brand title enhancements */
.brand-title, .brand-title-sm {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -.5px;
}
.brand-title { font-size:1.25rem; font-weight:600; }
.brand-title-sm { font-size:1.05rem; font-weight:600; }
.site-main-menu .nav-link { display:flex; align-items:center; gap:.25rem; }
.site-main-menu .nav-link .link-text { position:relative; }
.site-main-menu .nav-link:hover .link-text:after,
.site-main-menu .nav-link.active .link-text:after { content:""; position:absolute; left:0; right:0; bottom:-4px; height:2px; background:var(--brand-gradient); border-radius:2px; }

[data-theme="dark"] .card { background: var(--surface,#1b2631); border-color: var(--border-color,#2f4254); color: #e2e8f0; }
/* Ensure card titles and headings are highly visible in dark theme */
[data-theme="dark"] .card-title,
[data-theme="dark"] .card-title a,
[data-theme="dark"] .card h1,
[data-theme="dark"] .card h2,
[data-theme="dark"] .card h3,
[data-theme="dark"] .card h4,
[data-theme="dark"] .card h5,
[data-theme="dark"] .card h6 {
    color: #f8fafc !important;
}

/* Ensure card text has good readability */
[data-theme="dark"] .card-text {
    color: #dce4ec;
}

/* Card headers with background colors should maintain white text */
[data-theme="dark"] .card-header[class*="bg-"],
[data-theme="dark"] .card-header[class*="topic-"],
[data-theme="dark"] .card-header.bg-primary {
    color: #ffffff !important;
}

[data-theme="dark"] .card-header[class*="bg-"] *,
[data-theme="dark"] .card-header[class*="topic-"] * {
    color: #ffffff !important;
}

[data-theme="dark"] .app-nav { background: rgba(15,20,26,.85)!important; }
[data-theme="dark"] .dropdown-menu { background: var(--surface,#1b2631); border-color: var(--border-color,#2f4254); }
[data-theme="dark"] .dropdown-item { color: #d5dce3; }
[data-theme="dark"] .dropdown-item:hover { background: #223244; }

.app-nav { backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); background: rgba(255,255,255,.9); }
.brand-logo { width:34px; height:34px; aspect-ratio:1/1; object-fit:contain; object-position:center center; display:inline-block; image-rendering:auto; }
.brand-logo-cover { object-fit:cover; background:#fff; }
.brand-logo.rounded { border-radius:8px; }

.navbar-brand { font-size:1.15rem; letter-spacing:-.5px; }
.nav-link { font-weight:500; }
.nav-link.active, .nav-link:hover { color:var(--bs-primary)!important; }
.dropdown-menu { border-radius: var(--radius); }

.search-inline { min-width:200px; }
.search-inline .search-icon { position:absolute; top:50%; left:14px; transform:translateY(-50%); color:#6c757d; font-size:.85rem; }
.search-inline input { background: #f1f5f9; border:none; box-shadow: var(--shadow-sm); }
.search-inline input:focus { background:#fff; box-shadow:0 0 0 .2rem rgba(var(--bs-primary-rgb),.25); }
[data-theme="dark"] .search-inline input { background:#223244; color:#d5dce3; }

.card { border-radius: var(--radius); }
.card img { border-radius: calc(var(--radius) - 4px); }

.btn { border-radius: var(--radius-sm); font-weight:500; }
.btn-primary { background:var(--brand-gradient); border: none; }
.btn-primary:hover { filter:brightness(.95); }
.btn-outline-primary { border-width:2px; }

.badge { font-weight:600; letter-spacing:.25px; }
/* Ensure topic-colored badges always have white text on colored background */
.badge[class*="topic-"] {
    color: #ffffff !important;
}

.footer-links a { color: inherit; text-decoration:none; }
.footer-links a:hover { color: var(--bs-primary); }
.footer-brand-desc { color:#2a3c4d; line-height:1.4; }
.footer-brand-desc a { color:inherit; }
.footer-brand-desc strong { color:#1b2a38; }
[data-theme="dark"] .footer-brand-desc { color:#c2d2de; }
[data-theme="dark"] .footer-brand-desc strong { color:#e2edf5; }

.badge-tag { background:#e1ecf6; color:#214058; border:1px solid #c2d6e6; font-weight:500; }
.badge-tag:hover { background:#d5e5f2; color:#183246; }
[data-theme="dark"] .badge-tag { background:#243a49; color:#c8d8e5; border:1px solid #2e4a5d; }
[data-theme="dark"] .badge-tag:hover { background:#2f4b5d; color:#d6e4ef; }

.shadow-sm { box-shadow: var(--shadow-sm)!important; }
.shadow { box-shadow: var(--shadow)!important; }
.shadow-lg { box-shadow: var(--shadow-lg)!important; }

.hover-raise { transition:.25s ease; }
.hover-raise:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg)!important; }

.rounded-sm { border-radius: var(--radius-sm)!important; }
.rounded { border-radius: var(--radius)!important; }
.rounded-lg { border-radius: var(--radius-lg)!important; }
.gradient-text { background:var(--brand-gradient); -webkit-background-clip:text; color:transparent; }
.text-secondary { color: var(--muted,#556575)!important; }
[data-theme="dark"] .text-secondary { color: var(--muted,#8aa1b5)!important; }

a { transition: color .15s ease, opacity .15s ease; }
a:hover { text-decoration:none; }

.btn:focus, .form-control:focus, .form-select:focus { box-shadow:0 0 0 .2rem rgba(var(--bs-primary-rgb),.35); }

*::-webkit-scrollbar { width:10px; }
*::-webkit-scrollbar-track { background:transparent; }
*::-webkit-scrollbar-thumb { background:#c2d4e5; border-radius:20px; border:2px solid transparent; background-clip:content-box; }
[data-theme="dark"] *::-webkit-scrollbar-thumb { background:#2d4559; }

/* Language Switcher Buttons */
.lang-btn {
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.2;
  padding: 0.5rem 0.85rem;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
  min-width: 60px;
  border: 2px solid #dee2e6;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

.lang-btn i.fa-language {
  font-size: 1rem;
  opacity: 0.7;
}

.lang-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 8px rgba(0,0,0,0.15);
  border-color: var(--bs-primary);
  background: rgba(var(--bs-primary-rgb), 0.08);
}

.lang-btn:hover i.fa-language {
  opacity: 1;
}

.lang-btn:focus {
  box-shadow: 0 0 0 0.25rem rgba(var(--bs-primary-rgb), 0.25);
  border-color: var(--bs-primary);
}

.lang-btn.active {
  background: var(--bs-primary);
  border-color: var(--bs-primary);
  color: #fff !important;
  box-shadow: 0 2px 8px rgba(var(--bs-primary-rgb), 0.4);
}

.lang-btn.active i.fa-language {
  opacity: 1;
  color: #fff;
}

.lang-btn.active:hover {
  transform: scale(1.03);
  background: var(--bs-primary);
  filter: brightness(1.1);
}

[data-theme="dark"] .lang-btn {
  border-color: #2f4254;
  background: #1b2631;
  color: #d5dce3;
}

[data-theme="dark"] .lang-btn:hover {
  background: #223244;
  border-color: var(--bs-primary);
}

[data-theme="dark"] .lang-btn.active {
  background: var(--bs-primary);
  border-color: var(--bs-primary);
  color: #fff !important;
}

/* Language Switcher Buttons - Simple Text Version with Colors */
.lang-btn {
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1;
  padding: 0.4rem 0.6rem;
  border-radius: 0.35rem;
  transition: all 0.2s ease;
  border: 2px solid #dee2e6;
  letter-spacing: 0.3px;
}

/* UK Button - Blue theme */
.lang-btn[data-culture="en"] {
  color: #1e3a8a;
  border-color: #3b82f6;
}

.lang-btn[data-culture="en"]:hover {
  background: #eff6ff;
  border-color: #2563eb;
  color: #1e40af;
}

.lang-btn[data-culture="en"].active {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  border-color: #2563eb;
  color: #fff !important;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.3);
}

/* Italy Button - Green theme */
.lang-btn[data-culture="it"] {
  color: #047857;
  border-color: #10b981;
}

.lang-btn[data-culture="it"]:hover {
  background: #ecfdf5;
  border-color: #059669;
  color: #065f46;
}

.lang-btn[data-culture="it"].active {
  background: linear-gradient(135deg, #10b981, #059669);
  border-color: #059669;
  color: #fff !important;
  box-shadow: 0 2px 6px rgba(5, 150, 105, 0.3);
}

/* Common hover/focus states */
.lang-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 6px rgba(0,0,0,0.1);
}

.lang-btn:focus {
  outline: none;
  box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.2);
}

.lang-btn.active {
  transform: scale(0.98);
}

.lang-btn.active:hover {
  transform: scale(1.0);
  filter: brightness(1.05);
}

/* Dark theme adjustments */
[data-theme="dark"] .lang-btn {
  background: #1b2631;
  color: #d5dce3;
}

[data-theme="dark"] .lang-btn[data-culture="en"] {
  border-color: #3b82f6;
  color: #93c5fd;
}

[data-theme="dark"] .lang-btn[data-culture="en"]:hover {
  background: #1e3a5f;
  border-color: #2563eb;
  color: #bfdbfe;
}

[data-theme="dark"] .lang-btn[data-culture="it"] {
  border-color: #10b981;
  color: #6ee7b7;
}

[data-theme="dark"] .lang-btn[data-culture="it"]:hover {
  background: #1e4a3c;
  border-color: #059669;
  color: #a7f3d0;
}

[data-theme="dark"] .lang-btn.active {
  color: #fff !important;
}

/* Theme Toggle Button - Compact Circle Design */
#themeToggle {
transition: all 0.2s ease;
  border: 2px solid #dee2e6;
  display: flex;
  align-items: center;
  justify-content: center;
}

#themeToggle .theme-icon {
  font-size: 0.9rem;
  transition: transform 0.3s ease;
}

#themeToggle:hover {
  transform: translateY(-1px) rotate(20deg);
  box-shadow: 0 3px 8px rgba(0,0,0,0.15);
  border-color: var(--bs-primary);
  background: rgba(var(--bs-primary-rgb), 0.05);
}

#themeToggle:focus {
  box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.2);
}

[data-theme="dark"] #themeToggle {
  border-color: #2f4254;
  background: #1b2631;
  color: #fbbf24;
}

[data-theme="dark"] #themeToggle:hover {
  background: #223244;
  border-color: #fbbf24;
  color: #fcd34d;
  transform: translateY(-1px) rotate(-20deg);
}

/* Compact search box */
.search-inline {
  max-width: 180px;
}

.search-inline .form-control-sm {
  font-size: 0.8rem;
  padding: 0.35rem 0.5rem 0.35rem 2rem;
}

.search-inline .search-icon {
  font-size: 0.75rem;
  left: 10px;
}

/* Quiz Menu Item - Green Theme */
.nav-link.quiz-link {
  color: #198754 !important; /* Bootstrap success green */
}

.nav-link.quiz-link:hover {
  color: #146c43 !important; /* Darker green on hover */
}

.nav-link.quiz-link .link-text:after {
  background: linear-gradient(90deg, #198754, #20c997) !important;
}

[data-theme="dark"] .nav-link.quiz-link {
  color: #75d9a5 !important; /* Lighter green for dark mode */
}

[data-theme="dark"] .nav-link.quiz-link:hover {
  color: #9fe3bf !important;
}

/* AI Assistant Menu Item - Cyan/Info Theme */
.nav-link.assistant-link {
  color: #17a2b8 !important; /* Bootstrap info cyan */
}

.nav-link.assistant-link:hover {
  color: #138496 !important; /* Darker cyan on hover */
}

.nav-link.assistant-link .link-text:after {
  background: linear-gradient(90deg, #17a2b8, #20c997) !important;
}

[data-theme="dark"] .nav-link.assistant-link {
  color: #5fd4e7 !important; /* Lighter cyan for dark mode */
}

[data-theme="dark"] .nav-link.assistant-link:hover {
  color: #89e0ef !important;
}

/* Pulse Badge Animation for NEW */
.pulse-badge {
  font-size: 0.65rem;
  padding: 0.15rem 0.4rem;
  animation: pulse 2s infinite;
  box-shadow: 0 0 0 0 rgba(23, 162, 184, 0.7);
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(23, 162, 184, 0.7);
  }
  70% {
    box-shadow: 0 0 0 6px rgba(23, 162, 184, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(23, 162, 184, 0);
  }
}

.bg-gradient-info {
  background: linear-gradient(135deg, #17a2b8, #20c997) !important;
}

[data-theme="dark"] .pulse-badge {
  box-shadow: 0 0 0 0 rgba(95, 212, 231, 0.7);
}

@media (prefers-reduced-motion: reduce) {
  .pulse-badge {
    animation: none;
  }
}

/* ========================================
   Page Header Title Styling
   ======================================== */

/* Give page header titles the brand primary color */
.page-header-title {
  color: var(--bs-primary) !important;
  font-weight: 600;
}

.page-header-title i {
  color: var(--bs-primary);
}

/* Subtitle with complementary styling */
.page-header-subtitle {
  color: var(--bs-primary) !important;
  font-size: 1.05rem;
  line-height: 1.6;
}

/* Dark theme: slightly lighter blue for better contrast */
[data-theme="dark"] .page-header-title {
  color: #4dabf7 !important;
}

[data-theme="dark"] .page-header-title i {
  color: #4dabf7;
}

[data-theme="dark"] .page-header-subtitle {
    color: #4dabf7 !important;
}