:root {
  /* Light mode variables - ICTAZ color scheme */
  --background: 0 0% 100%;
  --foreground: 222.2 84% 4.9%;
  --card: 0 0% 100%;
  --card-foreground: 222.2 84% 4.9%;
  --popover: 0 0% 100%;
  --popover-foreground: 222.2 84% 4.9%;
  --primary: 214 100% 30%; /* ICTAZ Blue */
  --primary-foreground: 210 40% 98%;
  --secondary: 210 40% 96.1%;
  --secondary-foreground: 222.2 47.4% 11.2%;
  --muted: 210 40% 96.1%;
  --muted-foreground: 215.4 16.3% 46.9%;
  --accent: 210 40% 96.1%;
  --accent-foreground: 222.2 47.4% 11.2%;
  --destructive: 0 84.2% 60.2%;
  --destructive-foreground: 210 40% 98%;
  --border: 214.3 31.8% 91.4%;
  --input: 214.3 31.8% 91.4%;
  --ring: 214 100% 30%;
  --radius: 0.5rem;
  --radius-lg: var(--radius);
  --radius-md: calc(var(--radius) - 2px);
  --radius-sm: calc(var(--radius) - 4px);
  /* Gradient colors */
  --gradient-start: 214 100% 30%; /* ICTAZ Blue */
  --gradient-end: 214 100% 40%;
  
  /* Direct color values for easier use */
  --primary-color: #0056b3; /* ICTAZ Blue */
  --primary-light: #0069d9;
  --primary-dark: #004494;
  
  /* Light mode specific */
  --light-gradient-start: #f8f9fa;
  --light-gradient-end: #e9ecef;
}

[data-bs-theme="dark"] {
  /* Dark mode variables - Professional dark theme with ICTAZ blue */
  --background: 220 35% 7%;
  --foreground: 210 40% 98%;
  --card: 220 25% 10%;
  --card-foreground: 210 40% 98%;
  --popover: 220 35% 7%;
  --popover-foreground: 210 40% 98%;
  --primary: 214 100% 50%;
  --primary-foreground: 210 40% 98%;
  --secondary: 217.2 32.6% 17.5%;
  --secondary-foreground: 210 40% 98%;
  --muted: 217.2 32.6% 17.5%;
  --muted-foreground: 215 20.2% 65.1%;
  
  /* Direct color values for easier use */
  --primary-color: #0069d9; /* ICTAZ Blue */
  --primary-light: #007bff;
  --primary-dark: #0056b3;
  
  /* Dark mode specific */
  --dark-gradient-start: #0d1b2a;
  --dark-gradient-end: #1b263b;
}

/* General styles */
body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: 'Poppins', sans-serif;
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    background-image: linear-gradient(to bottom right, rgba(0, 105, 217, 0.03), rgba(0, 86, 179, 0.01));
}

/* Form controls */
.form-control, .form-select {
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(0, 105, 217, 0.25);
}

[data-bs-theme="dark"] .form-control, 
[data-bs-theme="dark"] .form-select {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: rgb(182, 182, 182);
}

[data-bs-theme="dark"] .form-control:focus, 
[data-bs-theme="dark"] .form-select:focus {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(0, 105, 217, 0.25);
    color: white;
}

[data-bs-theme="dark"] .form-control::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

[data-bs-theme="dark"] .form-select option {
    background-color: var(--dark-gradient-start);
    color: white;
}

[data-bs-theme="dark"] body {
    background-color: #0d1b2a;
    background-image: radial-gradient(at 40% 20%, rgba(0, 105, 217, 0.1) 0px, transparent 50%),
                      radial-gradient(at 80% 0%, rgba(0, 86, 179, 0.1) 0px, transparent 50%),
                      radial-gradient(at 0% 50%, rgba(0, 123, 255, 0.1) 0px, transparent 50%);
    background-attachment: fixed;
}

.main-content {
    flex: 1;
}

/* Navigation */
.navbar {
    background: linear-gradient(to right, var(--primary-color), var(--primary-light));
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

[data-bs-theme="dark"] .navbar {
    background: linear-gradient(to right, var(--dark-gradient-start), var(--dark-gradient-end));
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.navbar-brand, .nav-link {
    color: white !important;
}

.navbar-brand {
    font-weight: 600;
    display: flex;
    align-items: center;
}

.navbar-brand img {
    height: 40px;
    margin-right: 10px;
}

.nav-link {
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: var(--radius);
    padding: 0.5rem 1rem !important;
    margin: 0 0.2rem;
}

.nav-link:hover, .nav-link:focus {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
    font-weight: 600;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--radius);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    background-color: var(--bs-card-bg);
    color: var(--bs-body-color);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* Light theme card gradient */
[data-bs-theme="light"] .card {
    background: linear-gradient(145deg, white, var(--light-gradient-end));
    border: 1px solid rgba(0, 0, 0, 0.05);
}

[data-bs-theme="dark"] .card {
    background: linear-gradient(145deg, var(--dark-gradient-start), var(--dark-gradient-end));
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

[data-bs-theme="dark"] .card:hover {
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    font-weight: 600;
}

.card-title {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* Tables */
.table {
    border-collapse: separate;
    border-spacing: 0;
}

.table th {
    font-weight: 600;
    border-bottom-width: 2px;
    color: var(--primary-color);
}

.table td, .table th {
    padding: 1rem;
    vertical-align: middle;
}

/* Buttons */
.btn {
    border-radius: var(--radius);
    font-weight: 500;
    padding: 0.5rem 1.5rem;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-outline-primary {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.btn-outline-primary:hover, .btn-outline-primary:focus {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Footer */
.footer {
    background-color: hsl(var(--secondary));
    padding: 1.5rem 0;
    margin-top: 2rem;
    color: hsl(var(--secondary-foreground));
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Theme toggle */
.theme-toggle {
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: white;
    background-color: rgba(255, 255, 255, 0.2);
    width: 38px;
    height: 38px;
}

.theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* Alert styling */
.alert {
    border-radius: var(--radius);
    border: none;
}

/* Table styling */
.table {
    border-radius: var(--radius);
    overflow: hidden;
}

.table thead {
    background-color: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
}

/* Form controls */
.form-control, .form-select {
    border-radius: var(--radius);
    border: 1px solid hsl(var(--border));
    background-color: hsl(var(--input));
    color: hsl(var(--foreground));
    padding: 0.75rem 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: hsl(var(--ring));
    box-shadow: 0 0 0 3px hsl(var(--ring) / 0.2);
}

/* Badge styling */
.badge {
    font-weight: 500;
    padding: 0.5em 0.75em;
    border-radius: calc(var(--radius) - 4px);
}

/* Attended row styling */
.attended {
    background-color: hsl(120 70% 50% / 0.1);
}

/* Media queries */
@media (max-width: 768px) {
    .card {
        margin-bottom: 1rem;
    }
    
    .navbar-brand img {
        height: 30px;
    }
    
    .btn {
        padding: 0.4rem 1rem;
    }
}