/* ========================================
   Market Research ROI Calculator Styles
   Premier Market Insights
   ======================================== */

/* Root Variables - Customize for your brand */
:root {
    --primary-color: #0066cc;
    --secondary-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --success-color: #28a745;
    --light-bg: #f8f9fa;
    --dark-text: #212529;
    --muted-text: #6c757d;
    --border-radius: 0.5rem;
    --transition-speed: 0.3s;
}

/* Global Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--dark-text);
    line-height: 1.6;
}

/* Header Section */
.calculator-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #004999 100%);
}

    .calculator-header .fa-check-circle,
    .calculator-header .fa-chart-line,
    .calculator-header .fa-users,
    .calculator-header .fa-clock {
        opacity: 0.9;
    }

/* Card Styling */
.card {
    border-radius: var(--border-radius);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

    .card:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15) !important;
    }

/* Form Section Titles */
.section-title {
    font-weight: 600;
    color: var(--dark-text);
    border-bottom: 2px solid var(--light-bg);
    padding-bottom: 0.5rem;
}

/* Form Inputs */
.form-control,
.form-select {
    border-radius: var(--border-radius);
    border: 2px solid #e0e0e0;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

    .form-control:focus,
    .form-select:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
    }

.input-group-text {
    background-color: var(--light-bg);
    border: 2px solid #e0e0e0;
    font-weight: 600;
}

/* Labels */
.form-label {
    margin-bottom: 0.5rem;
    color: var(--dark-text);
}

    .form-label .fa-info-circle {
        cursor: pointer;
        font-size: 0.9rem;
    }

/* Validation Styling */
.form-control.is-invalid,
.form-select.is-invalid {
    border-color: var(--danger-color);
}

.form-control.is-valid,
.form-select.is-valid {
    border-color: var(--success-color);
}

.invalid-feedback {
    display: none;
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

    .invalid-feedback.show {
        display: block;
    }

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    padding: 0.75rem 2rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--transition-speed);
}

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

    .btn-primary:hover {
        background-color: #0052a3;
        border-color: #0052a3;
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(0, 102, 204, 0.3);
    }

.btn-outline-secondary:hover {
    transform: translateY(-2px);
}

#calculateBtn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

/* Loading State */
.btn-loading::after {
    content: "";
    display: inline-block;
    width: 1rem;
    height: 1rem;
    margin-left: 0.5rem;
    border: 2px solid #fff;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spinner 0.6s linear infinite;
}

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

/* Results Section */
.results-section {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ROI Hero Card */
.roi-hero-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-left: 5px solid var(--primary-color);
}

.roi-percentage {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
}

    .roi-percentage.positive {
        color: var(--success-color);
    }

    .roi-percentage.negative {
        color: var(--danger-color);
    }

    .roi-percentage.neutral {
        color: var(--warning-color);
    }

/* Results Table */
.table-responsive {
    overflow-x: auto;
}

.table {
    margin-bottom: 0;
}

    .table thead th {
        border-bottom: 2px solid var(--primary-color);
        font-weight: 600;
        text-transform: uppercase;
        font-size: 0.85rem;
        letter-spacing: 0.5px;
    }

    .table tbody tr {
        transition: background-color var(--transition-speed);
    }

        .table tbody tr:hover {
            background-color: rgba(0, 102, 204, 0.05);
        }

    .table tbody td {
        vertical-align: middle;
        padding: 1rem;
    }

.metric-value {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1.1rem;
}

/* Methodology Cards */
.methodology-section .card {
    transition: all var(--transition-speed);
}

    .methodology-section .card:hover {
        border-color: var(--primary-color);
    }

.methodology-section .badge {
    width: 2.5rem;
    height: 2.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

/* Formula Text */
.formula-text {
    font-family: 'Courier New', monospace;
    background-color: #f5f5f5;
    padding: 1rem;
    border-left: 4px solid var(--primary-color);
    margin-bottom: 0;
    font-size: 1rem;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #004999 100%);
}

/* Responsive Design */
@media (max-width: 768px) {
    .calculator-header .display-4 {
        font-size: 2rem;
    }

    .calculator-header .lead {
        font-size: 1rem;
    }

    .roi-percentage {
        font-size: 2.5rem;
    }

    .card-body {
        padding: 1.5rem !important;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .table {
        font-size: 0.85rem;
    }

    .methodology-section .badge {
        width: 2rem;
        height: 2rem;
        font-size: 1rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Print Styles */
@media print {
    .calculator-header,
    .calculator-section,
    .methodology-section,
    .cta-section,
    .btn,
    #resetBtn,
    #calculateBtn {
        display: none !important;
    }

    .results-section {
        display: block !important;
    }

    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}

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

/* Skip to results link for keyboard navigation */
.skip-to-results {
    position: absolute;
    left: -9999px;
    z-index: 999;
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
}

    .skip-to-results:focus {
        left: 50%;
        transform: translateX(-50%);
        top: 10px;
    }

/* Loading Overlay (Optional for Phase 2) */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

    .loading-overlay.show {
        display: flex;
    }

.spinner-border {
    width: 3rem;
    height: 3rem;
}