:root {
    /* Main brand colors - elegant teal/turquoise theme */
    --primary-color: #00B2B2;
    --secondary-color: #19D3C5;
    --accent-color: #E7FAFA;
    
    /* Status colors */
    --success-color: #2DD36F;
    --danger-color: #FF6B6B;
    --warning-color: #FFB259;
    
    /* Neutral colors */
    --text-color: #2C3E50;
    --light-text: #94A3B8;
    --border-color: #E2E8F0;
    
    /* Gradient colors */
    --gradient-start: #00B2B2;
    --gradient-end: #19D3C5;
    
    /* Card colors */
    --card-bg: #FFFFFF;
    --card-hover-shadow: rgba(0, 178, 178, 0.15);
}

body {
    font-family: 'Poppins', system-ui, -apple-system, sans-serif;
    color: var(--text-color);
    background: linear-gradient(135deg, #F8FDFD 0%, #FFFFFF 100%);
}

.navbar {
    background: linear-gradient(100deg, var(--gradient-start), var(--gradient-end)) !important;
    box-shadow: 0 4px 20px rgba(0, 178, 178, 0.15);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

.card {
    border-radius: 20px;
    border: none;
    background: var(--card-bg);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px var(--card-hover-shadow);
    border-color: var(--primary-color);
}

.card-body {
    padding: 1.75rem;
}

.btn {
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border: none;
    box-shadow: 0 4px 10px rgba(0, 178, 178, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--gradient-end), var(--gradient-start));
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 178, 178, 0.3);
}

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

.btn-outline-primary:hover {
    background: var(--accent-color);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.display-4 {
    font-weight: 700;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--gradient-start) 30%, var(--gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

.display-4::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
    border-radius: 2px;
}

.feature-item {
    padding: 2rem;
    border-radius: 16px;
    background: white;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 178, 178, 0.12);
}

.feature-item i {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* Amount badges with gradients */
.amount-badge {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 600;
}

/* Settlement card styling */
.settlement-item {
    background: var(--accent-color);
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 0.75rem;
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.settlement-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(0, 178, 178, 0.1);
}

/* Form styling */
.form-control, .form-select {
    border-radius: 12px;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    font-size: 1rem;
    transition: all 0.2s ease;
    background-color: #F8FAFC;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--accent-color);
    background-color: white;
}

/* Modal styling */
.modal-content {
    border-radius: 20px;
    border: none;
    box-shadow: 0 15px 35px rgba(0, 178, 178, 0.15);
}

.modal-header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border-bottom: none;
    padding: 1.5rem;
    border-radius: 20px 20px 0 0;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

.modal-footer {
    border-top: 2px solid var(--border-color);
    padding: 1.5rem;
}

/* List group styling */
.list-group-item {
    border: none;
    border-radius: 12px !important;
    margin-bottom: 0.75rem;
    background: #F8FAFC;
    padding: 1.25rem;
    transition: all 0.3s ease;
}

.list-group-item:hover {
    background: var(--accent-color);
    transform: translateX(5px);
}

/* Custom animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card, .feature-item {
    animation: fadeInUp 0.5s ease-out;
}

/* Status colors */
.text-success {
    color: var(--success-color) !important;
}

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

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

/* Event code display */
.event-code {
    background: rgba(255, 255, 255, 0.3);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-family: 'Monaco', monospace;
    font-size: 0.9rem;
    letter-spacing: 1px;
    color: white;
    backdrop-filter: blur(4px);
}

/* Category tags */
.category-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    background: var(--accent-color);
    color: var(--primary-color);
    margin-right: 0.5rem;
}