/* Color Variables */
:root {
    --charcoal-dark: #2c3e50;
    --charcoal-medium: #34495e;
    --charcoal-light: #7f8c8d;
    --persian-green-dark: #00695c;
    --persian-green-medium: #00897b;
    --persian-green-light: #26a69a;
    --persian-green-lighter: #4db6ac;
    --white: #ffffff;
    --off-white: #f8f9fa;
    --light-gray: #e9ecef;
}

html {
    font-size: 14px;
}

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

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem var(--white), 0 0 0 0.25rem var(--persian-green-medium);
}

html {
    position: relative;
    min-height: 100%;
}

body {
    margin-bottom: 60px;
    background-color: var(--off-white);
    color: var(--charcoal-dark);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Navigation Bar Styles */
.navbar {
    background-color: var(--charcoal-dark) !important;
    border-bottom: 3px solid var(--persian-green-medium);
}

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

.navbar-nav .nav-link:hover {
    color: var(--persian-green-lighter) !important;
}

/* Button Styles */
.btn-primary {
    background-color: var(--persian-green-medium);
    border-color: var(--persian-green-dark);
    color: var(--white);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--persian-green-dark);
    border-color: var(--persian-green-dark);
    color: var(--white);
}

.btn-secondary {
    background-color: var(--charcoal-light);
    border-color: var(--charcoal-medium);
    color: var(--white);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--charcoal-medium);
    border-color: var(--charcoal-dark);
    color: var(--white);
}

.btn-info {
    background-color: var(--persian-green-light);
    border-color: var(--persian-green-medium);
    color: var(--white);
}

.btn-info:hover,
.btn-info:focus {
    background-color: var(--persian-green-medium);
    border-color: var(--persian-green-dark);
    color: var(--white);
}

.btn-warning {
    background-color: #ff9800;
    border-color: #f57c00;
    color: var(--white);
}

.btn-danger {
    background-color: #e53935;
    border-color: #c62828;
    color: var(--white);
}

/* Card and Container Styles */
.card {
    border: 1px solid var(--charcoal-light);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.card-header {
    background-color: var(--persian-green-medium);
    color: var(--white);
    border-bottom: 1px solid var(--persian-green-dark);
}

/* Table Styles */
.table {
    border: 1px solid var(--charcoal-light);
}

.table thead th {
    background-color: var(--persian-green-medium);
    color: var(--white);
    border-bottom: 2px solid var(--persian-green-dark);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: var(--light-gray);
}

.table-hover tbody tr:hover {
    background-color: var(--persian-green-lighter);
    color: var(--white);
}

/* Form Styles */
.form-control:focus {
    border-color: var(--persian-green-medium);
    box-shadow: 0 0 0 0.2rem rgba(0, 137, 123, 0.25);
}

.form-label {
    color: var(--charcoal-dark);
    font-weight: 500;
}

/* Alert Styles */
.alert-info {
    background-color: var(--persian-green-lighter);
    border-color: var(--persian-green-light);
    color: var(--charcoal-dark);
}

.alert-success {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: #ffeaa7;
    color: #856404;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

/* Footer and Layout */
.footer {
    background-color: var(--charcoal-dark);
    color: var(--white);
    border-top: 3px solid var(--persian-green-medium);
}

/* Custom utility classes */
.bg-charcoal {
    background-color: var(--charcoal-dark);
    color: var(--white);
}

.bg-persian-green {
    background-color: var(--persian-green-medium);
    color: var(--white);
}

.text-charcoal {
    color: var(--charcoal-dark);
}

.text-persian-green {
    color: var(--persian-green-medium);
}

.border-persian-green {
    border-color: var(--persian-green-medium) !important;
}