/* ===================================
   CSS Reset and Base Styles
   =================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Professional and Industry-Friendly */
    --primary-color: #2c5282;
    --primary-dark: #1a365d;
    --secondary-color: #4a5568;
    --accent-color: #3182ce;

    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-muted: #718096;

    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;

    --border-color: #cbd5e0;
    --border-light: #e2e8f0;

    --success-color: #38a169;
    --error-color: #e53e3e;

    /* Spacing - Reduced for more compact layout */
    --spacing-xs: 0.375rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.125rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.25rem;

    /* Typography - Reduced base sizes for more compact view */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 14px;
    /* Reduced from 16px */
    --font-size-sm: 0.75rem;
    /* Reduced from 0.875rem */
    --font-size-lg: 1rem;
    /* Reduced from 1.125rem */
    --font-size-xl: 1.25rem;
    /* Reduced from 1.5rem */
    --font-size-2xl: 1.625rem;
    /* Reduced from 2rem */

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    /* Reduced from 1.6 for more compact layout */
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    /* Wider container for better space usage */
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Header Styles
   =================================== */

.header {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.header-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin: 0;
}

.history-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.history-link:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.history-badge {
    display: inline-block;
    background-color: var(--error-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.125rem 0.5rem;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

/* ===================================
   Container and Layout
   =================================== */

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.main-content {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

/* ===================================
   Progress Indicator
   =================================== */

.progress-indicator {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    position: relative;
    padding: 0 var(--spacing-sm);
}

/* Progress line connecting steps */
.progress-indicator::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 10%;
    right: 10%;
    height: 2px;
    background-color: var(--border-color);
    z-index: 0;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
    flex: 1;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-primary);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
    transition: all 0.3s ease;
}

.step-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-align: center;
    max-width: 120px;
}

/* Active step styling */
.progress-step.active .step-number {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.progress-step.active .step-label {
    color: var(--primary-color);
    font-weight: 600;
}

/* Completed step styling */
.progress-step.completed .step-number {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.progress-step.completed .step-label {
    color: var(--text-primary);
}

/* ===================================
   Form Container and Sections
   =================================== */

.form-container {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    min-height: 500px;
}

.form-section {
    display: none;
}

.form-section.active {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

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

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

.section-title {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: var(--spacing-sm);
}

.section-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-base);
}

/* ===================================
   Form Elements
   =================================== */

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-base);
}

.form-select {
    width: 100%;
    padding: 0.75rem var(--spacing-sm);
    font-size: var(--font-size-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.2s ease;
    cursor: pointer;
}

.form-select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
}

.form-select:hover {
    border-color: var(--accent-color);
}

/* Placeholder styling */
.form-select option[value=""] {
    color: var(--text-muted);
}

/* ===================================
   Form Validation Styles
   =================================== */

/* Error state for form fields */
.form-select.field-error {
    border-color: var(--error-color);
    background-color: rgba(229, 62, 62, 0.05);
    animation: shake 0.3s;
}

.form-select.field-error:focus {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.2);
}

/* Validation error message */
.validation-error {
    background-color: rgba(229, 62, 62, 0.1);
    border-left: 4px solid var(--error-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: slideDown 0.3s ease-out;
}

.validation-error .error-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.validation-error .error-text {
    color: var(--error-color);
    font-weight: 500;
    font-size: var(--font-size-base);
}

/* Shake animation for errors */
@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-5px);
    }

    20%,
    40%,
    60%,
    80% {
        transform: translateX(5px);
    }
}

/* Slide down animation for error message */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

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


/* ===================================
   Review Section
   =================================== */

.review-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.review-section {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
}

.review-section-title {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.review-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
}

.review-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--border-light);
}

.review-item:last-child {
    border-bottom: none;
}

.review-label {
    font-weight: 500;
    color: var(--text-secondary);
}

.review-value {
    color: var(--text-primary);
    font-weight: 400;
}

.review-empty {
    color: var(--text-muted);
    font-style: italic;
    text-align: center;
    padding: var(--spacing-md);
}

/* ===================================
   Navigation Buttons
   =================================== */

.navigation-buttons {
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.btn {
    padding: 0.75rem var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 120px;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.3);
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-dark);
}

.btn-secondary {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-tertiary);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===================================
   Footer
   =================================== */

.footer {
    background-color: var(--bg-tertiary);
    padding: var(--spacing-md) 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    border-top: 1px solid var(--border-light);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .header-title {
        font-size: var(--font-size-xl);
    }

    .history-link {
        justify-content: center;
    }

    .progress-indicator {
        overflow-x: auto;
        padding-bottom: var(--spacing-sm);
    }

    .step-label {
        font-size: 0.75rem;
        max-width: 80px;
    }

    .step-number {
        width: 32px;
        height: 32px;
        font-size: var(--font-size-sm);
    }

    .form-container {
        padding: var(--spacing-md);
    }

    .navigation-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .section-title {
        font-size: var(--font-size-lg);
    }
}

/* ===================================
   Results Section
   =================================== */

.result-container {
    margin-top: var(--spacing-xl);
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl);
    animation: fadeIn 0.5s ease-in;
}

.result-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--border-light);
}

.result-title {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.result-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

.result-content {
    display: grid;
    gap: var(--spacing-lg);
}

.result-section {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border-left: 4px solid var(--accent-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.result-section:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.result-section-title {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.result-section-title .icon {
    font-size: 1.5rem;
}

.result-value {
    color: var(--text-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin: 0;
}

.primary-model {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary-color);
    background-color: rgba(49, 130, 206, 0.1);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.fallback-model {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-primary);
    background-color: rgba(74, 85, 104, 0.1);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.result-list {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.result-list li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-primary);
    line-height: 1.6;
}

.result-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.result-actions {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

.result-actions .btn {
    flex: 1;
}

/* Print styles */
@media print {

    .header,
    .footer,
    .navigation-buttons,
    .result-actions,
    .progress-indicator {
        display: none;
    }

    .result-container {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* Responsive adjustments for results */
@media (max-width: 768px) {
    .result-container {
        padding: var(--spacing-md);
    }

    .result-title {
        font-size: var(--font-size-xl);
    }

    .result-actions {
        flex-direction: column;
    }

    .result-actions .btn {
        width: 100%;
    }
}