/* CSS Variables for Color Palette */
:root {
    --color-primary: #F8B195;
    --color-secondary: #F67280;
    --color-tertiary: #C06C84;
    --color-quaternary: #6C5B7B;
    --color-quinary: #355C7D;
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --gradient-secondary: linear-gradient(135deg, var(--color-secondary), var(--color-tertiary));
    --gradient-tertiary: linear-gradient(135deg, var(--color-tertiary), var(--color-quaternary));
    --gradient-quaternary: linear-gradient(135deg, var(--color-quaternary), var(--color-quinary));
    --gradient-success: linear-gradient(135deg, #28a745, #20c997);
    --gradient-info: linear-gradient(135deg, #17a2b8, #6f42c1);
    --gradient-warning: linear-gradient(135deg, #ffc107, #fd7e14);
    --gradient-danger: linear-gradient(135deg, #dc3545, #e83e8c);
    --shadow-soft: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-medium: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.2);
    --shadow-strong: 0 1rem 2rem rgba(0, 0, 0, 0.25);
    --border-radius: 0.75rem;
    --transition: all 0.3s ease;
}

/* Global Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.fw-bold {
    font-weight: 700 !important;
}

/* Gradient Backgrounds */
.bg-primary-gradient {
    background: var(--gradient-primary) !important;
}

.bg-secondary-gradient {
    background: var(--gradient-secondary) !important;
}

.bg-tertiary-gradient {
    background: var(--gradient-tertiary) !important;
}

.bg-quaternary-gradient {
    background: var(--gradient-quaternary) !important;
}

.bg-success-gradient {
    background: var(--gradient-success) !important;
}

.bg-info-gradient {
    background: var(--gradient-info) !important;
}

.bg-warning-gradient {
    background: var(--gradient-warning) !important;
}

.bg-danger-gradient {
    background: var(--gradient-danger) !important;
}

/* Button Styles */
.btn-primary-gradient {
    background: var(--gradient-primary);
    border: none;
    color: white;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    box-shadow: var(--shadow-soft);
}

.btn-primary-gradient:hover {
    background: var(--gradient-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    color: white;
}

.btn-secondary-gradient {
    background: var(--gradient-secondary);
    border: none;
    color: white;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.btn-secondary-gradient:hover {
    background: var(--gradient-tertiary);
    transform: translateY(-2px);
    color: white;
}

/* Card Styles */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

.card-gradient {
    background: var(--gradient-primary);
    color: white;
}

.card-header {
    border-bottom: none;
    font-weight: 600;
    padding: 1.25rem 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

/* Form Styles */
.form-control {
    border: 2px solid #e9ecef;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 0.2rem rgba(248, 177, 149, 0.25);
}

.form-control.is-invalid {
    border-color: #dc3545;
}

.form-control.is-valid {
    border-color: #28a745;
}

.input-group-text {
    background: var(--gradient-primary);
    color: white;
    border: none;
    font-weight: 600;
}

.form-label {
    color: #495057;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

/* Tooltip Styles */
.tooltip {
    font-size: 0.875rem;
}

.tooltip-inner {
    background: var(--gradient-quaternary);
    color: white;
    border-radius: 0.5rem;
    padding: 0.5rem 0.75rem;
    max-width: 250px;
}

.tooltip.bs-tooltip-top .tooltip-arrow::before {
    border-top-color: var(--color-quinary);
}

.tooltip.bs-tooltip-bottom .tooltip-arrow::before {
    border-bottom-color: var(--color-quinary);
}

.tooltip.bs-tooltip-start .tooltip-arrow::before {
    border-left-color: var(--color-quinary);
}

.tooltip.bs-tooltip-end .tooltip-arrow::before {
    border-right-color: var(--color-quinary);
}

/* Modal Styles */
.modal-content {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-strong);
}

.modal-header {
    border-bottom: none;
    padding: 1.5rem 1.5rem 1rem 1.5rem;
}

.modal-body {
    padding: 1rem 1.5rem;
}

.modal-footer {
    border-top: none;
    padding: 1rem 1.5rem 1.5rem 1.5rem;
}

.footer_link {
    color: white;
    text-decoration: none;
}

/* Offcanvas Styles */
.offcanvas {
    border: none;
    box-shadow: var(--shadow-strong);
}

.offcanvas-header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.offcanvas-body {
    padding: 1.5rem;
}

/* Navigation Styles */
.navbar {
    box-shadow: var(--shadow-soft);
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: var(--transition);
}

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

/* Results Styles */
.result-item {
    background: #f8f9fa;
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--color-primary);
    transition: var(--transition);
}

.result-item:hover {
    background: #e9ecef;
    transform: translateX(5px);
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-quaternary);
}

.result-label {
    font-size: 0.9rem;
    color: #6c757d;
    margin-bottom: 0.25rem;
}

.result-positive {
    color: #28a745;
}

.result-negative {
    color: #dc3545;
}

.result-warning {
    color: #ffc107;
}

/* Alert Styles */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}

.alert-success {
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    color: #155724;
}

.alert-warning {
    background: linear-gradient(135deg, #fff3cd, #ffeaa7);
    color: #856404;
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da, #f5c6cb);
    color: #721c24;
}

/* Chart Styles */
#workingCapitalChart {
    max-width: 100%;
    height: auto;
    border-radius: 0.5rem;
}

/* History Styles */
.history-item {
    background: #f8f9fa;
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid #e9ecef;
    transition: var(--transition);
}

.history-item:hover {
    background: #e9ecef;
    border-color: var(--color-primary);
}

.history-date {
    font-size: 0.875rem;
    color: #6c757d;
    margin-bottom: 0.5rem;
}

.history-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-quaternary);
}

/* Accordion Styles */
.accordion-item {
    border: none;
    margin-bottom: 0.5rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.accordion-button {
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
    border: none;
    padding: 1rem 1.25rem;
}

.accordion-button:not(.collapsed) {
    background: var(--gradient-secondary);
    color: white;
    box-shadow: none;
}

.accordion-button::after {
    filter: brightness(0) invert(1);
}

.accordion-body {
    background: #f8f9fa;
    padding: 1.25rem;
}

/* AdSense Container */
.ad-container {
    text-align: center;
    margin: 1rem 0;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: var(--border-radius);
    border: 1px dashed #dee2e6;
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .modal-dialog {
        margin: 1rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .result-value {
        font-size: 1.25rem;
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .form-control {
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

@media (max-width: 576px) {
    .offcanvas {
        width: 100% !important;
    }
    
    .modal-dialog {
        margin: 0.5rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .result-item {
        padding: 0.75rem;
    }
    
    .history-item {
        padding: 0.75rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    .modal,
    .offcanvas,
    .ad-container {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }
    
    .bg-primary-gradient,
    .bg-secondary-gradient,
    .bg-success-gradient,
    .bg-info-gradient,
    .bg-warning-gradient {
        background: #f8f9fa !important;
        color: #333 !important;
    }
}

/* Accessibility Improvements */
.btn:focus,
.form-control:focus,
.accordion-button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --shadow-soft: 0 0.5rem 1rem rgba(0, 0, 0, 0.5);
        --shadow-medium: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.6);
        --shadow-strong: 0 1rem 2rem rgba(0, 0, 0, 0.7);
    }
    
    .form-control {
        border-width: 3px;
    }
    
    .card {
        border: 2px solid #333;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .card:hover,
    .btn:hover,
    .result-item:hover,
    .history-item:hover {
        transform: none;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
        color: #f8f9fa;
    }
    
    .card {
        background: #2d2d2d;
        color: #f8f9fa;
    }
    
    .form-control {
        background: #3d3d3d;
        border-color: #555;
        color: #f8f9fa;
    }
    
    .form-control:focus {
        background: #3d3d3d;
        border-color: var(--color-primary);
        color: #f8f9fa;
    }
    
    .result-item,
    .history-item {
        background: #3d3d3d;
        color: #f8f9fa;
    }
    
    .accordion-body {
        background: #3d3d3d;
        color: #f8f9fa;
    }
}