/* Custom CSS for Sentinel Systems */

/* Custom colors - Modern Professional Palette */
:root {
  --primary-color: #2C5282;      /* Deep Blue */
  --primary-light: #3182CE;      /* Medium Blue */
  --primary-dark: #1A365D;       /* Dark Blue */
  --secondary-color: #4A5568;    /* Slate Gray */
  --accent-color: #3182CE;       /* Blue Accent */
  --success-color: #38A169;      /* Green */
  --warning-color: #D69E2E;      /* Orange */
  --danger-color: #E53E3E;       /* Red */
  --light-color: #F7FAFC;        /* Very Light Gray */
  --light-blue: #EBF8FF;         /* Light Blue Background */
  --dark-color: #1A202C;         /* Very Dark Blue */
  --text-primary: #2D3748;       /* Dark Gray Text */
  --text-secondary: #4A5568;     /* Medium Gray Text */
  --border-color: #E2E8F0;       /* Light Border */
}

/* Global styles */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
}

/* Typography improvements */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 600;
}

.text-muted {
  color: var(--text-secondary) !important;
}

/* Background variations */
.bg-light-gradient {
  background: linear-gradient(135deg, var(--light-color) 0%, var(--light-blue) 100%);
}

.bg-white-soft {
  background: linear-gradient(135deg, #ffffff 0%, var(--light-color) 100%);
}

/* Custom gradient background */
.bg-gradient-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 50%, var(--primary-dark) 100%);
}

.bg-gradient-light {
  background: linear-gradient(135deg, var(--light-color) 0%, var(--light-blue) 100%);
}

/* Logo styling */
.logo-img {
  background: white;
  padding: 8px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  border: 2px solid rgba(255, 255, 255, 0.2);
  object-fit: contain;
}

.hero-logo {
  background: white;
  padding: 30px;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(44, 82, 130, 0.15);
  border: 3px solid var(--border-color);
  max-width: 500px;
  margin: 0 auto;
  object-fit: contain;
}

.brand-text {
  font-weight: 700;
  color: white;
  font-size: 1.2rem;
}

/* Ensure logo visibility on different backgrounds */
.navbar-brand .logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

/* Logo hover effect */
.navbar-brand:hover .logo-img {
  transform: scale(1.05);
  transition: all 0.3s ease;
}

/* Hero section styles */
.hero-section {
  min-height: 100vh;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 50%, var(--accent-color) 100%);
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(44, 82, 130, 0.9) 0%, rgba(49, 130, 206, 0.8) 100%);
  z-index: 1;
}

.hero-section .container {
  position: relative;
  z-index: 2;
}

/* Card hover effects */
.card {
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(44, 82, 130, 0.15) !important;
  border-color: var(--primary-light);
}

.card-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  border-bottom: none;
}

/* Icon backgrounds with gradients */
.bg-primary.bg-gradient {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%) !important;
}

.text-primary {
  color: var(--primary-color) !important;
}

/* Section backgrounds */
.bg-light {
  background-color: var(--light-blue) !important;
}

/* Footer improvements */
footer {
  background: linear-gradient(135deg, var(--dark-color) 0%, #2D3748 100%) !important;
}

footer .text-primary {
  color: var(--accent-color) !important;
}

/* Form improvements */
.form-control {
  border-radius: 8px;
  border: 2px solid var(--border-color);
  transition: all 0.3s ease;
  padding: 12px 16px;
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(44, 82, 130, 0.25);
}

.form-select {
  border-radius: 8px;
  border: 2px solid var(--border-color);
  padding: 12px 16px;
}

.form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(44, 82, 130, 0.25);
}

/* Button styles */
.btn {
  border-radius: 8px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  padding: 12px 24px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  border: none;
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(44, 82, 130, 0.3);
}

.btn-outline-primary {
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  background: transparent;
}

.btn-outline-primary:hover {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
  transform: translateY(-2px);
}

.btn-light {
  background: white;
  border: none;
  color: var(--primary-color);
  font-weight: 600;
}

.btn-light:hover {
  background: var(--light-color);
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.btn-outline-light {
  border: 2px solid white;
  color: white;
  background: transparent;
}

.btn-outline-light:hover {
  background: white;
  border-color: white;
  color: var(--primary-color);
  transform: translateY(-2px);
}

/* Custom navbar styles */
.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
}

.navbar-nav .nav-link {
  font-weight: 500;
  margin: 0 10px;
  transition: all 0.3s ease;
  color: rgba(255, 255, 255, 0.9) !important;
}

.navbar-nav .nav-link:hover {
  color: white !important;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.navbar-nav .nav-link.active {
  color: white !important;
  font-weight: 600;
  position: relative;
}

.navbar-nav .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 3px;
  background: white;
  border-radius: 2px;
}

/* Navbar scroll effect */
.navbar-scrolled {
  background: linear-gradient(135deg, rgba(44, 82, 130, 0.95) 0%, rgba(49, 130, 206, 0.95) 100%) !important;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Back to top button */
.btn-back-to-top {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
}

.btn-back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(44, 82, 130, 0.4);
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
}

/* Icon styles */
.fas, .far {
  transition: all 0.3s ease;
}

/* Protocol cards */
.protocol-card {
  background: var(--light-color);
  border: 1px solid #dee2e6;
  border-radius: 8px;
  padding: 15px;
  text-align: center;
  transition: all 0.3s ease;
}

.protocol-card:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-3px);
}

/* Form styles */
.form-control {
  border-radius: 6px;
  border: 1px solid #ced4da;
  transition: all 0.3s ease;
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(0, 86, 179, 0.25);
}

.form-select {
  border-radius: 6px;
}

/* Accordion styles */
.accordion-button {
  background: linear-gradient(135deg, var(--light-color) 0%, var(--light-blue) 100%);
  color: var(--text-primary);
  font-weight: 500;
  border: 1px solid var(--border-color);
}

.accordion-button:not(.collapsed) {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  color: white;
  border-color: var(--primary-color);
}

.accordion-button:focus {
  box-shadow: 0 0 0 0.25rem rgba(44, 82, 130, 0.25);
  border-color: var(--primary-color);
}

.accordion-item {
  border: 1px solid var(--border-color);
  border-radius: 8px !important;
  margin-bottom: 10px;
}

.accordion-body {
  background: white;
}

/* Section spacing */
section {
  padding: 60px 0;
}

/* Text styles */
.display-4, .display-5, .display-6 {
  font-weight: 700;
}

.lead {
  font-size: 1.15rem;
  font-weight: 400;
}

/* Footer styles */
footer {
  background-color: #2c3e50 !important;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero-section {
    min-height: 80vh;
  }
  
  .display-4 {
    font-size: 2.5rem;
  }
  
  section {
    padding: 40px 0;
  }
  
  .navbar-brand span {
    display: none;
  }
}

/* Animation classes */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

/* Custom utilities */
.shadow-lg-custom {
  box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175) !important;
}

.border-primary-custom {
  border-color: var(--primary-color) !important;
}

/* Loading states */
.btn.loading {
  position: relative;
  color: transparent;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: #ffffff;
  animation: spin 1s linear infinite;
}

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

/* Print styles */
@media print {
  .navbar, .btn, footer {
    display: none !important;
  }
  
  .hero-section {
    min-height: auto !important;
    padding: 20px 0 !important;
  }
}