/* =================================
   3RATE ENHANCED STYLES
   Design moderno e responsive senza librerie terze
   ================================= */

/* === VARIABILI CSS === */
:root {
  /* Colori principali */
  --primary-color: #006BF4;
  --primary-dark: #0052c4;
  --primary-light: #3384f6;
  --secondary-color: #64748b;
  --accent-color: #00d67a;
  --accent-hover: #00b369;
  
  /* Colori di stato */
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  
  /* Grigi */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  /* Ombre e gradienti */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Gradient per header */
  --header-gradient: linear-gradient(135deg, var(--gray-800) 0%, var(--gray-900) 100%);
  --card-gradient: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
  --brand-gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Transizioni */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* === RESET E BASE === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
  min-height: 100vh;
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  line-height: 1.6;
  color: var(--gray-700);
  overflow-x: hidden;
}

/* === NAVBAR MIGLIORATA === */
.navbar {
  background: var(--header-gradient) !important;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-normal);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: white !important;
  transition: var(--transition-fast);
}

.navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.9) !important;
  font-weight: 500;
  margin: 0 var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md) !important;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  position: relative;
}

.navbar-nav .nav-link:hover {
  color: white !important;
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.navbar-nav .nav-link.active {
  color: white !important;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  box-shadow: var(--shadow-md);
}

.navbar-toggler {
  border: 2px solid rgba(255, 255, 255, 0.3);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.navbar-toggler:hover {
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.1);
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.8);
}

.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='rgba%28255, 255, 255, 0.9%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='m4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
  width: 1.5em;
  height: 1.5em;
}

/* === HEADER MODERNO === */
.bg-dark {
  background: var(--header-gradient) !important;
  position: relative;
  overflow: hidden;
}

.bg-dark::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.03"><circle cx="30" cy="30" r="4"/></g></svg>');
  pointer-events: none;
}

.bg-dark .container {
  position: relative;
  z-index: 1;
}

.bg-dark h2 {
  font-weight: 300;
  letter-spacing: 0.5px;
  margin-top: var(--spacing-md);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.bg-dark img {
  max-width: 280px;
  height: auto;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
  transition: var(--transition-normal);
}

.bg-dark img:hover {
  transform: scale(1.02);
}

/* === SEZIONE PRINCIPALE === */
section {
  background: transparent !important;
  padding: var(--spacing-2xl) 0;
}

.homesection {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* === CARD MODERNE === */
.large-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
  transition: var(--transition-normal);
}

.large-card-link:hover,
.large-card-link:focus {
  text-decoration: none;
  color: inherit;
}

.large-card {
  background: var(--card-gradient);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-2xl);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  height: auto;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.large-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--brand-gradient);
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.large-card-link:hover .large-card,
.large-card-link:focus .large-card {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-light);
}

.large-card-link:hover .large-card::before,
.large-card-link:focus .large-card::before {
  height: 6px;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--accent-hover) 100%);
}

/* === LAYOUT CARD === */
.card-content-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

.img-card {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  transition: var(--transition-normal);
}

.img-card img {
  max-width: 140px;
  height: auto;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
  transition: var(--transition-normal);
}

.large-card-link:hover .img-card,
.large-card-link:focus .img-card {
  background: white;
  transform: scale(1.05);
}

.large-card-link:hover .img-card img,
.large-card-link:focus .img-card img {
  transform: scale(1.1);
}

.card-body {
  flex: 1;
  min-width: 200px;
  text-align: center;
  padding: var(--spacing-lg);
}

.card-body h5 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gray-800);
  margin: 0;
  transition: var(--transition-fast);
  text-decoration: none !important;
}

.large-card-link:hover .card-body h5,
.large-card-link:focus .card-body h5 {
  color: var(--primary-color);
  transform: translateY(-2px);
}

/* === BADGE COLORI === */
.card-body.one::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--accent-color);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: var(--transition-normal);
}

.card-body.two::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--primary-color);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: var(--transition-normal);
}

.large-card-link:hover .card-body.one::after,
.large-card-link:hover .card-body.two::after,
.large-card-link:focus .card-body.one::after,
.large-card-link:focus .card-body.two::after {
  width: 100px;
  height: 6px;
}

/* === FOOTER MODERNO === */
footer {
  background: var(--header-gradient) !important;
  margin-top: var(--spacing-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

footer p {
  margin: 0;
  font-weight: 300;
  opacity: 0.9;
}

/* === MIGLIORAMENTI INPUT E FORM === */
.input-field {
  background: white;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  font-size: 1rem;
  transition: var(--transition-fast);
  width: 100%;
}

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

.btn {
  border-radius: var(--radius-md);
  font-weight: 500;
  padding: var(--spacing-md) var(--spacing-xl);
  transition: var(--transition-fast);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-primary {
  background: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-success {
  background: var(--success-color);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-success:hover {
  background: #059669;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 1200px) {
  .homesection {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-2xl: 2rem;
  }
  
  .navbar-nav {
    text-align: center;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
  }
  
  .navbar-nav .nav-link {
    margin: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg) !important;
  }
  
  .navbar-toggler {
    margin-right: var(--spacing-sm);
  }
  
  .bg-dark {
    padding: var(--spacing-lg) 0;
  }
  
  .bg-dark img {
    max-width: 220px;
  }
  
  .bg-dark h2 {
    font-size: 1.5rem;
    margin-top: var(--spacing-sm);
  }
  
  section {
    padding: var(--spacing-xl) 0;
  }
  
  .homesection {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    padding: 0 var(--spacing-sm);
  }
  
  .large-card {
    padding: var(--spacing-xl);
    min-height: 240px;
  }
  
  .card-content-wrapper {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .img-card {
    padding: var(--spacing-sm);
  }
  
  .img-card img {
    max-width: 100px;
  }
  
  .card-body {
    padding: var(--spacing-md);
  }
  
  .card-body h5 {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .homesection {
    padding: 0 var(--spacing-xs);
  }
  
  .large-card {
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
  }
  
  .img-card img {
    max-width: 80px;
  }
  
  .card-body h5 {
    font-size: 1.1rem;
  }
  
  .bg-dark img {
    max-width: 180px;
  }
  
  .bg-dark h2 {
    font-size: 1.25rem;
  }
}

/* === TOUCH E MOBILE OTTIMIZZAZIONI === */
.large-card-link {
  /* Migliorare la touch area */
  min-height: 44px; /* iOS guidelines per touch targets */
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

/* Active state per touch devices */
.large-card-link:active .large-card {
  transform: translateY(-4px) scale(0.98);
  transition-duration: 0.1s;
}

/* Focus per accessibilità */
.large-card-link:focus {
  outline: 3px solid var(--primary-color);
  outline-offset: 4px;
  border-radius: var(--radius-2xl);
}

/* Migliore feedback visivo su touch */
@media (hover: none) and (pointer: coarse) {
  .large-card-link:hover .large-card {
    transform: none;
    box-shadow: var(--shadow-lg);
  }
  
  .large-card-link:active .large-card {
    transform: translateY(-2px) scale(0.99);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
  }
}

/* === ANIMAZIONI AGGIUNTIVE === */
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.large-card {
  animation: slideInUp 0.6s ease-out;
}

.large-card:nth-child(2) {
  animation-delay: 0.2s;
}

.navbar {
  animation: fadeIn 0.8s ease-out;
}

/* === MIGLIORAMENTI ACCESSIBILITÀ === */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus per navigazione da tastiera */
.large-card:focus-within {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
}

.card-body a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* === STATO DI CARICAMENTO === */
.loading {
  opacity: 0.7;
  pointer-events: none;
  position: relative;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--gray-300);
  border-top: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}