/* ===================================
   Upshot ROI Calculator - Main Styles
   ================================== */

/* CSS Variables */
:root {
    /* Upshot Brand Colors */
    --color-primary: #1e3a8a;
    --color-primary-dark: #1e40af;
    --color-secondary: #be185d;
    --color-secondary-light: #db2777;
    
    /* Functional Colors */
    --color-success: #059669;
    --color-info: #0891b2;
    --color-warning: #d97706;
    --color-danger: #dc2626;
    --color-purple: #7c3aed;
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Borders & Shadows */
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--color-gray-800);
    background: var(--color-gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.header {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-lg) 0;
}

.header-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.logo {
    height: 50px;
    width: auto;
}

.header-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 400;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
}

/* Main Content */
.main-content {
    padding: var(--spacing-2xl) 0;
    min-height: calc(100vh - 400px);
}

.calculator-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

/* Card Styles */
.card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.card-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--color-gray-200);
}

.card-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.card-header h3 i {
    color: var(--color-primary);
}

.card-subtitle {
    color: var(--color-gray-600);
    font-size: 0.95rem;
    margin: 0;
}

.disclaimer {
    color: var(--color-warning);
    font-size: 0.9rem;
    font-weight: 600;
    margin: 0;
}

/* Form Styles */
.roi-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.form-group-section {
    background: var(--color-gray-50);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-primary);
}

.upshot-section {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.05), rgba(190, 24, 93, 0.05));
    border-left-color: var(--color-secondary);
}

.section-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.section-title i {
    color: var(--color-primary);
}

.optional-badge {
    background: var(--color-gray-300);
    color: var(--color-gray-700);
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 1rem;
    font-weight: 600;
    margin-left: auto;
}

.badge-upshot {
    background: var(--color-secondary);
    color: var(--color-white);
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-weight: 600;
    margin-left: auto;
}

.subsection-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-gray-800);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.subsection-title i {
    color: var(--color-primary);
}

/* Upshot Guarantee Box */
.upshot-guarantee-box {
    background: linear-gradient(135deg, rgba(190, 24, 93, 0.1), rgba(30, 58, 138, 0.1));
    border: 2px solid var(--color-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.guarantee-icon {
    width: 60px;
    height: 60px;
    background: var(--color-secondary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    flex-shrink: 0;
}

.guarantee-content h5 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xs);
}

.guarantee-content p {
    font-size: 0.9rem;
    color: var(--color-gray-700);
    margin: 0;
}

/* Readonly Value Styles */
.readonly-value {
    padding: 0.75rem;
    background: var(--color-white);
    border: 2px solid var(--color-secondary);
    border-radius: var(--border-radius);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-gray-900);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
}

.improvement-badge {
    background: var(--color-success);
    color: var(--color-white);
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.form-row:last-child {
    margin-bottom: 0;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.95rem;
}

.required {
    color: var(--color-danger);
    font-weight: 700;
}

.tooltip {
    position: relative;
    cursor: help;
    color: var(--color-info);
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 50%;
    bottom: 100%;
    transform: translateX(-50%);
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    white-space: nowrap;
    z-index: 100;
    margin-bottom: var(--spacing-xs);
    box-shadow: var(--shadow-lg);
    font-weight: 400;
}

.form-group input,
.form-group select {
    padding: 0.75rem;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: var(--font-family);
    transition: var(--transition);
    background: var(--color-white);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-group input:hover,
.form-group select:hover {
    border-color: var(--color-gray-400);
}

.form-hint {
    color: var(--color-gray-600);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
    font-style: italic;
}

.info-box {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-weight: 600;
    font-size: 1.1rem;
}

.info-box i {
    font-size: 1.5rem;
}

/* Button Styles */
.btn-primary,
.btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-block {
    width: 100%;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    padding-top: var(--spacing-lg);
}

/* KPI Cards */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.kpi-card {
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 2px solid var(--color-gray-200);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: var(--transition);
}

.kpi-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.kpi-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    flex-shrink: 0;
}

.kpi-content {
    flex: 1;
}

.kpi-label {
    font-size: 0.9rem;
    color: var(--color-gray-600);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.kpi-value {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-xs);
}

.kpi-note {
    font-size: 0.75rem;
    color: var(--color-gray-500);
    font-style: italic;
}

/* KPI Color Variants */
.kpi-primary {
    border-color: var(--color-primary);
}

.kpi-primary .kpi-icon {
    background: var(--color-primary);
    color: var(--color-white);
}

.kpi-primary .kpi-value {
    color: var(--color-primary);
}

.kpi-success {
    border-color: var(--color-success);
}

.kpi-success .kpi-icon {
    background: var(--color-success);
    color: var(--color-white);
}

.kpi-success .kpi-value {
    color: var(--color-success);
}

.kpi-info {
    border-color: var(--color-info);
}

.kpi-info .kpi-icon {
    background: var(--color-info);
    color: var(--color-white);
}

.kpi-info .kpi-value {
    color: var(--color-info);
}

.kpi-warning {
    border-color: var(--color-warning);
}

.kpi-warning .kpi-icon {
    background: var(--color-warning);
    color: var(--color-white);
}

.kpi-warning .kpi-value {
    color: var(--color-warning);
}

.kpi-danger {
    border-color: var(--color-danger);
}

.kpi-danger .kpi-icon {
    background: var(--color-danger);
    color: var(--color-white);
}

.kpi-danger .kpi-value {
    color: var(--color-danger);
}

.kpi-purple {
    border-color: var(--color-purple);
}

.kpi-purple .kpi-icon {
    background: var(--color-purple);
    color: var(--color-white);
}

.kpi-purple .kpi-value {
    color: var(--color-purple);
}

/* Charts */
.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-xl);
}

.chart-container {
    background: var(--color-gray-50);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-gray-200);
}

.chart-full-width {
    grid-column: 1 / -1;
}

.chart-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

/* Process Flow */
.process-flow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.flow-column {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 2px solid var(--color-gray-300);
}

.flow-column h5 {
    text-align: center;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-900);
}

.flow-upshot {
    border-color: var(--color-secondary);
    background: linear-gradient(135deg, rgba(190, 24, 93, 0.05), rgba(30, 58, 138, 0.05));
}

.flow-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.flow-step {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 600;
}

.flow-upshot .flow-step {
    background: var(--color-secondary);
}

.flow-arrow {
    text-align: center;
    font-size: 1.5rem;
    color: var(--color-gray-400);
    font-weight: 700;
}

/* Sensitivity Table */
.sensitivity-table {
    overflow-x: auto;
}

.sensitivity-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.sensitivity-table th,
.sensitivity-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.sensitivity-table th {
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

.sensitivity-table tr:hover {
    background: var(--color-gray-50);
}

.sensitivity-table tr:last-child td {
    border-bottom: none;
}

/* Export Actions */
.export-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* CTA Card */
.cta-card {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-white);
    text-align: center;
}

.cta-card h3 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.cta-card p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

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

.cta-card .btn-primary:hover {
    background: var(--color-gray-100);
    transform: translateY(-2px);
}

.cta-card .btn-secondary {
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.cta-card .btn-secondary:hover {
    background: var(--color-white);
    color: var(--color-primary);
}

.privacy-checkbox {
    margin-top: var(--spacing-xl);
}

.privacy-checkbox label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.95rem;
}

.privacy-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Footer */
.footer {
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
}

.footer-content {
    text-align: center;
}

.footer-content p {
    margin: var(--spacing-xs) 0;
}

.disclaimer-footer {
    font-size: 0.85rem;
    color: var(--color-gray-400);
}

/* Sticky Mobile CTA */
.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-white);
    padding: var(--spacing-md);
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .header-title {
        font-size: 1.25rem;
    }
    
    .logo {
        height: 40px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .kpi-grid {
        grid-template-columns: 1fr;
    }
    
    .kpi-value {
        font-size: 1.5rem;
    }
    
    .chart-grid {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .export-actions {
        flex-direction: column;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .sticky-cta {
        display: block;
    }
    
    .tooltip:hover::after {
        white-space: normal;
        max-width: 200px;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .main-content {
        padding: var(--spacing-lg) 0;
    }
}

/* Print Styles */
@media print {
    .header,
    .hero,
    .form-section,
    .export-actions,
    .cta-card,
    .footer,
    .sticky-cta {
        display: none !important;
    }
    
    .results-section {
        display: block !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--color-gray-300);
        page-break-inside: avoid;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.results-section {
    animation: fadeIn 0.6s ease;
}

/* Loading State */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 4px solid var(--color-gray-300);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Accessibility */
*:focus-visible {
    outline: 3px 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-width: 0;
}