/* Custom Design System for Loan Deal Form */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=Inter:wght@400;500;600&display=swap');

/* CSS Variables for Design System */
:root {
    --primary-navy: #0D1B2A;
    --accent-light: #F5F5F5;
    --background-white: #FFFFFF;
    --text-muted: #A9A9A9;
    --border-color: #E0E0E0;
    --border-radius: 8px;
    --shadow-subtle: 0 2px 8px rgba(13, 27, 42, 0.08);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

/* Reset and Base Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 400;
    line-height: 1.6;
    color: var(--primary-navy);
    background-color: var(--background-white);
    margin: 0;
    padding: 0;
}

/* Override Bootstrap Dark Theme */
html[data-bs-theme="dark"] {
    --bs-body-bg: var(--background-white);
    --bs-body-color: var(--primary-navy);
    --bs-card-bg: var(--background-white);
    --bs-border-color: var(--border-color);
}

/* Typography System */
h1, h2, h3, h4, h5, h6,
.section-header h4 {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 700;
    color: var(--primary-navy);
    letter-spacing: 0.02em;
    margin-bottom: var(--spacing-sm);
}

.section-header h4 {
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

/* Layout Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

/* Card System */
.card {
    background: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-subtle);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.card-header {
    background: var(--accent-light);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    border-radius: 0;
}

.card-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-navy);
}

.card-body {
    padding: var(--spacing-xl);
    background: var(--background-white);
}

/* Section Headers */
.section-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.section-header:first-child {
    margin-top: 0;
}

.section-header i {
    color: var(--primary-navy);
    opacity: 0.8;
}

/* Form Controls */
.form-label {
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.01em;
}

.form-control {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.75rem var(--spacing-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    color: var(--primary-navy);
    background-color: var(--background-white);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
    border-color: var(--primary-navy);
    box-shadow: 0 0 0 3px rgba(13, 27, 42, 0.1);
    outline: none;
    background-color: var(--background-white);
}

.form-control::placeholder {
    color: var(--text-muted);
    opacity: 1;
}

/* Select Elements */
.form-select {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.75rem var(--spacing-sm);
    font-family: 'Inter', sans-serif;
    color: var(--primary-navy);
    background-color: var(--background-white);
}

.form-select:focus {
    border-color: var(--primary-navy);
    box-shadow: 0 0 0 3px rgba(13, 27, 42, 0.1);
    background-color: var(--background-white);
}

/* Checkboxes and Radio Buttons */
.form-check {
    margin-bottom: var(--spacing-sm);
}

.form-check-input {
    border: 1px solid var(--border-color);
    background-color: var(--background-white);
}

.form-check-input:checked {
    background-color: var(--primary-navy);
    border-color: var(--primary-navy);
}

.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(13, 27, 42, 0.1);
}

.form-check-label {
    font-family: 'Inter', sans-serif;
    color: var(--primary-navy);
    margin-left: var(--spacing-xs);
}

/* Buttons */
.btn {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    letter-spacing: 0.02em;
    border-radius: var(--border-radius);
    padding: 0.75rem var(--spacing-lg);
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--primary-navy);
    border-color: var(--primary-navy);
    color: white;
}

.btn-primary:hover {
    background-color: #1a2f47;
    border-color: #1a2f47;
    transform: translateY(-1px);
    box-shadow: var(--shadow-subtle);
}

.btn-secondary {
    background-color: var(--accent-light);
    border-color: var(--border-color);
    color: var(--primary-navy);
}

.btn-secondary:hover {
    background-color: #e8e8e8;
    border-color: var(--text-muted);
}

.btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--primary-navy);
    background-color: transparent;
}

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

/* Required Field Indicator */
.required {
    color: #dc3545;
    font-weight: 600;
}

/* Text Colors */
.text-muted {
    color: var(--text-muted) !important;
}

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

/* Alerts */
.alert {
    border-radius: var(--border-radius);
    border: none;
    font-family: 'Inter', sans-serif;
    margin-bottom: var(--spacing-lg);
}

.alert-success {
    background-color: #d1f2d1;
    color: #0f5132;
}

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

/* Grid and Spacing */
.row {
    margin-bottom: var(--spacing-sm);
}

.mb-3 {
    margin-bottom: var(--spacing-md) !important;
}

.mb-4 {
    margin-bottom: var(--spacing-lg) !important;
}

.mt-4 {
    margin-top: var(--spacing-lg) !important;
}

/* Badge Styling */
.badge {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.bg-warning {
    background-color: #fff3cd !important;
    color: #664d03 !important;
}

/* Form Validation */
.is-invalid {
    border-color: #dc3545;
}

.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

/* File Input Styling */
.form-control[type="file"] {
    padding: 0.5rem var(--spacing-sm);
}

/* Dividers */
.section-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: var(--spacing-xl) 0;
    border: none;
}

/* Platform Selection Cards */
.platform-card {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    background-color: var(--background-white);
    transition: all 0.2s ease;
}

.platform-card:hover {
    border-color: var(--primary-navy);
    transform: translateY(-2px);
    box-shadow: var(--shadow-subtle);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .card-body {
        padding: var(--spacing-lg);
    }
    
    .section-header h4 {
        font-size: 0.9rem;
    }
}

/* Print Styles */
@media print {
    .btn, .card-header {
        display: none;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
}

/* Focus Indicators for Keyboard Navigation */
.btn:focus,
.form-control:focus,
.form-check-input:focus {
    outline: 2px solid var(--primary-navy);
    outline-offset: 2px;
}