/**
 * Common Form Styles
 * Shared styles across all form themes
 * Theme-specific styles should override these using CSS variables
 *
 * FULLY RESPONSIVE TO DARK MODE - Respects system preference and manual toggle
 */

/* CSS Variables - Light Mode (Default) */
:root {
    /* Brand Colors - Orange/Amber Gradient (matching referrals) */
    --form-primary-color: #f26419;
    --form-primary-dark: #e34a0f;
    --form-primary-light: #ff7a3d;
    --form-secondary-color: #f7931e;
    --form-accent-color: #ff6b35;
    --form-success-color: #10b981;
    --form-error-color: #ef4444;
    --form-warning-color: #f59e0b;

    /* Brand Gradients */
    --form-brand-gradient: linear-gradient(135deg, #f26419 0%, #e34a0f 100%);
    --form-brand-gradient-vertical: linear-gradient(180deg, #f26419 0%, #e34a0f 100%);
    --form-brand-gradient-hover: linear-gradient(135deg, #ff7a3d 0%, #f26419 100%);

    /* Text Colors - Light Mode */
    --form-text-primary: #1f2937;
    --form-text-secondary: #6b7280;
    --form-text-muted: #9ca3af;
    --form-text-inverse: #ffffff;

    /* Backgrounds - Light Mode */
    --form-bg-primary: #ffffff;
    --form-bg-secondary: #f9fafb;
    --form-bg-tertiary: #f3f4f6;
    --form-bg-page: #f9fafb;

    /* Borders - Light Mode */
    --form-border-color: #e5e7eb;
    --form-border-color-hover: #d1d5db;
    --form-border-color-focus: var(--form-primary-color);
    --form-border-radius: 8px;
    --form-border-radius-lg: 12px;
    --form-border-radius-xl: 16px;

    /* Glass Morphism Effects */
    --form-glass-bg: rgba(255, 255, 255, 0.9);
    --form-glass-backdrop: blur(10px);
    --form-glass-border: rgba(242, 100, 25, 0.2);

    /* Spacing Scale (matching referrals) */
    --space-xs: 0.25rem;    /* 4px */
    --space-sm: 0.5rem;     /* 8px */
    --space-md: 1rem;       /* 16px */
    --space-lg: 1.5rem;     /* 24px */
    --space-xl: 2rem;       /* 32px */
    --space-2xl: 3rem;      /* 48px */
    --space-3xl: 4rem;      /* 64px */
    --space-4xl: 6rem;      /* 96px */

    /* Legacy spacing (for backward compatibility) */
    --form-spacing-xs: 4px;
    --form-spacing-sm: 8px;
    --form-spacing-md: 16px;
    --form-spacing-lg: 24px;
    --form-spacing-xl: 32px;
    --form-spacing-2xl: 48px;

    /* Typography */
    --form-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --form-font-size-sm: 14px;
    --form-font-size-base: 16px;
    --form-font-size-lg: 18px;
    --form-font-size-xl: 24px;
    --form-font-size-2xl: 32px;

    /* Shadows - Light Mode (5 semantic levels) */
    --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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Brand Shadow (with orange glow) */
    --shadow-brand: 0 4px 12px rgba(242, 100, 25, 0.2);
    --shadow-brand-lg: 0 10px 25px rgba(242, 100, 25, 0.3);

    /* Legacy shadows (for backward compatibility) */
    --form-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --form-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --form-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --form-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --form-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Transitions (matching referrals timing) */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Legacy transitions (for backward compatibility) */
    --form-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --form-transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --form-transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode - System Preference */
@media (prefers-color-scheme: dark) {
    :root {
        /* Text Colors - Dark Mode */
        --form-text-primary: #f9fafb;
        --form-text-secondary: #d1d5db;
        --form-text-muted: #9ca3af;
        --form-text-inverse: #1f2937;

        /* Backgrounds - Dark Mode */
        --form-bg-primary: #1f2937;
        --form-bg-secondary: #111827;
        --form-bg-tertiary: #374151;
        --form-bg-page: #111827;

        /* Borders - Dark Mode */
        --form-border-color: #374151;
        --form-border-color-hover: #4b5563;

        /* Shadows - Dark Mode (more subtle) */
        --form-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --form-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
        --form-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
        --form-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
        --form-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    }
}

/* Dark Mode - Manual Toggle (when html has .dark class) */
.dark {
    /* Text Colors - Dark Mode */
    --form-text-primary: #f9fafb;
    --form-text-secondary: #d1d5db;
    --form-text-muted: #9ca3af;
    --form-text-inverse: #1f2937;

    /* Backgrounds - Dark Mode */
    --form-bg-primary: #1f2937;
    --form-bg-secondary: #111827;
    --form-bg-tertiary: #374151;
    --form-bg-page: #111827;

    /* Borders - Dark Mode */
    --form-border-color: #374151;
    --form-border-color-hover: #4b5563;

    /* Shadows - Dark Mode */
    --form-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --form-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --form-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --form-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    --form-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

/* Base Form Container */
.form-page-wrapper {
    min-height: 100vh;
    padding: var(--form-spacing-2xl) var(--form-spacing-md);
    background: var(--form-bg-page);
    font-family: var(--form-font-family);
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
}

/* Form Header */
.form-header-section {
    text-align: center;
    margin-bottom: var(--form-spacing-2xl);
}

.form-title {
    font-size: var(--form-font-size-2xl);
    font-weight: 700;
    color: var(--form-text-primary);
    margin: 0 0 var(--form-spacing-md) 0;
    line-height: 1.2;
}

.form-description {
    font-size: var(--form-font-size-lg);
    color: var(--form-text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* Form Body */
.form-body-wrapper {
    background: var(--form-bg-primary);
    border-radius: var(--form-border-radius-xl);
    box-shadow: var(--form-shadow-xl);
    overflow: hidden;
}

.form-body {
    padding: var(--form-spacing-2xl);
}

/* Form Element */
.dynamic-form {
    display: block;
}

/* Form Sections */
.form-section {
    margin-bottom: var(--form-spacing-2xl);
}

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

.form-section-header {
    margin-bottom: var(--form-spacing-lg);
    padding-bottom: var(--form-spacing-md);
    border-bottom: 2px solid var(--form-border-color);
}

.form-section-title {
    font-size: var(--form-font-size-xl);
    font-weight: 700;
    color: var(--form-text-primary);
    margin: 0 0 var(--form-spacing-sm) 0;
    display: flex;
    align-items: center;
    gap: var(--form-spacing-md);
}

.form-section-icon {
    font-size: 28px;
}

.form-section-subtitle {
    font-size: var(--form-font-size-base);
    font-weight: 600;
    color: var(--form-primary-color);
    margin: 0 0 var(--form-spacing-xs) 0;
}

.form-section-description {
    font-size: var(--form-font-size-sm);
    color: var(--form-text-secondary);
    margin: 0;
    line-height: 1.5;
}

.form-section-fields {
    display: flex;
    flex-direction: column;
    gap: var(--form-spacing-lg);
}

/* Form Fields */
.form-field-wrapper {
    display: block;
}

.form-label {
    display: block;
    margin-bottom: var(--form-spacing-sm);
    font-size: var(--form-font-size-sm);
    font-weight: 600;
    color: var(--form-text-primary);
}

.required-indicator {
    color: var(--form-error-color);
    margin-left: 4px;
}

.form-help-text {
    margin: 0 0 var(--form-spacing-sm) 0;
    font-size: var(--form-font-size-sm);
    color: var(--form-text-secondary);
    line-height: 1.5;
}

/* Input Fields */
.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--form-font-size-base);
    font-family: var(--form-font-family);
    color: var(--form-text-primary);
    background: var(--form-bg-primary);
    border: 2px solid var(--form-border-color);
    border-radius: var(--form-border-radius);
    transition: all var(--form-transition-base);
    outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--form-primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
    border-color: var(--form-text-muted);
}

.form-input.field-error,
.form-textarea.field-error,
.form-select.field-error {
    border-color: var(--form-error-color);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Checkboxes and Radio Buttons */
.form-radio-group,
.form-checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--form-spacing-md);
}

.form-radio-label,
.form-checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--form-spacing-sm);
    cursor: pointer;
    padding: var(--form-spacing-sm);
    border-radius: var(--form-border-radius);
    transition: background var(--form-transition-fast);
}

.form-radio-label:hover,
.form-checkbox-label:hover {
    background: var(--form-bg-secondary);
}

.form-radio,
.form-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--form-primary-color);
}

.form-radio-text,
.form-checkbox-text {
    font-size: var(--form-font-size-base);
    color: var(--form-text-primary);
}

/* File Input */
.form-file {
    display: block;
    width: 100%;
    font-size: var(--form-font-size-sm);
    padding: 12px;
    border: 2px dashed var(--form-border-color);
    border-radius: var(--form-border-radius);
    cursor: pointer;
    transition: all var(--form-transition-base);
}

.form-file:hover {
    border-color: var(--form-primary-color);
    background: var(--form-bg-secondary);
}

.form-file-hint {
    margin-top: var(--form-spacing-sm);
    font-size: var(--form-font-size-sm);
    color: var(--form-text-muted);
}

/* Currency Input */
.form-currency-wrapper {
    display: flex;
    align-items: center;
    gap: var(--form-spacing-sm);
    border: 2px solid var(--form-border-color);
    border-radius: var(--form-border-radius);
    padding: 0 var(--form-spacing-md);
    transition: border-color var(--form-transition-base);
}

.form-currency-wrapper:focus-within {
    border-color: var(--form-primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.currency-symbol {
    font-size: var(--form-font-size-base);
    font-weight: 600;
    color: var(--form-text-secondary);
}

.form-currency {
    border: none;
    padding: 12px 0;
}

.form-currency:focus {
    box-shadow: none;
}

/* Rating Input */
.form-rating {
    display: flex;
    align-items: center;
    gap: var(--form-spacing-xs);
}

.form-rating-input {
    display: none;
}

.form-rating-label {
    font-size: 32px;
    cursor: pointer;
    opacity: 0.3;
    transition: all var(--form-transition-fast);
}

.form-rating-input:checked ~ .form-rating-label,
.form-rating-label:hover,
.form-rating-label:hover ~ .form-rating-label {
    opacity: 1;
}

/* Slider Input */
.form-slider-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--form-spacing-sm);
}

.form-slider {
    width: 100%;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--form-bg-secondary);
    border-radius: 999px;
    outline: none;
}

.form-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: var(--form-primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--form-transition-base);
}

.form-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.form-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: var(--form-primary-color);
    border-radius: 50%;
    border: none;
    cursor: pointer;
    transition: all var(--form-transition-base);
}

.form-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.form-slider-value {
    text-align: center;
    font-size: var(--form-font-size-lg);
    font-weight: 600;
    color: var(--form-primary-color);
}

/* Color Picker */
.form-color {
    width: 100px;
    height: 50px;
    border: 2px solid var(--form-border-color);
    border-radius: var(--form-border-radius);
    cursor: pointer;
}

/* Layout Elements */
.form-divider {
    margin: var(--form-spacing-xl) 0;
    border: 0;
    border-top: 2px solid var(--form-border-color);
}

.form-heading {
    font-size: var(--form-font-size-xl);
    font-weight: 700;
    color: var(--form-text-primary);
    margin: var(--form-spacing-lg) 0 var(--form-spacing-md) 0;
}

.form-paragraph {
    font-size: var(--form-font-size-base);
    color: var(--form-text-secondary);
    line-height: 1.6;
    margin: var(--form-spacing-md) 0;
}

.form-html-block {
    margin: var(--form-spacing-md) 0;
}

/* Field Errors */
.field-error-message {
    margin-top: var(--form-spacing-sm);
    padding: var(--form-spacing-sm) var(--form-spacing-md);
    background: #fee2e2;
    border-left: 3px solid var(--form-error-color);
    border-radius: var(--form-border-radius);
    font-size: var(--form-font-size-sm);
    color: #991b1b;
}

/* Submit Button */
.form-submit-wrapper {
    margin-top: var(--form-spacing-xl);
    padding-top: var(--form-spacing-xl);
    border-top: 2px solid var(--form-border-color);
}

.btn-submit {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--form-spacing-sm);
    padding: 16px 32px;
    font-size: var(--form-font-size-lg);
    font-weight: 600;
    font-family: var(--form-font-family);
    color: white;
    background: linear-gradient(135deg, var(--form-primary-color) 0%, var(--form-primary-dark) 100%);
    border: none;
    border-radius: var(--form-border-radius-lg);
    cursor: pointer;
    transition: all var(--form-transition-base);
    box-shadow: var(--form-shadow-md);
}

.btn-submit:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--form-shadow-lg);
}

.btn-submit:active:not(:disabled) {
    transform: translateY(0);
}

.btn-submit:disabled,
.btn-submit.loading {
    opacity: 0.7;
    cursor: not-allowed;
}

.submit-icon {
    width: 20px;
    height: 20px;
}

.submit-spinner {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Multi-Step Navigation */
.form-step-navigation {
    display: flex;
    justify-content: space-between;
    gap: var(--form-spacing-md);
    margin-top: var(--form-spacing-xl);
    padding-top: var(--form-spacing-xl);
    border-top: 2px solid var(--form-border-color);
}

.btn-step-prev,
.btn-step-next,
.btn-step-submit {
    display: inline-flex;
    align-items: center;
    gap: var(--form-spacing-sm);
    padding: 12px 24px;
    font-size: var(--form-font-size-base);
    font-weight: 600;
    font-family: var(--form-font-family);
    border: 2px solid;
    border-radius: var(--form-border-radius);
    cursor: pointer;
    transition: all var(--form-transition-base);
}

.btn-step-prev {
    background: white;
    color: var(--form-text-primary);
    border-color: var(--form-border-color);
}

.btn-step-prev:hover {
    background: var(--form-bg-secondary);
    border-color: var(--form-text-secondary);
}

.btn-step-next,
.btn-step-submit {
    background: var(--form-primary-color);
    color: white;
    border-color: var(--form-primary-color);
    margin-left: auto;
}

.btn-step-next:hover,
.btn-step-submit:hover {
    background: var(--form-primary-dark);
    border-color: var(--form-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--form-shadow-md);
}

.nav-icon {
    width: 16px;
    height: 16px;
}

/* Form Footer */
.form-footer {
    text-align: center;
    margin-top: var(--form-spacing-2xl);
}

.form-footer-text {
    font-size: var(--form-font-size-sm);
    color: var(--form-text-muted);
}

/* Responsive Design */
@media (max-width: 768px) {
    .form-page-wrapper {
        padding: var(--form-spacing-lg) var(--form-spacing-sm);
    }

    .form-body {
        padding: var(--form-spacing-lg);
    }

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

    .form-description {
        font-size: var(--form-font-size-base);
    }

    .form-step-navigation {
        flex-direction: column;
    }

    .btn-step-next,
    .btn-step-submit {
        margin-left: 0;
        order: -1;
    }
}

/* Print Styles */
@media print {
    .theme-switcher-widget,
    .preview-notice,
    .btn-submit,
    .form-step-navigation {
        display: none !important;
    }

    .form-page-wrapper {
        background: white;
    }

    .form-body-wrapper {
        box-shadow: none;
        border: 1px solid #000;
    }
}

/* Accessibility */
.form-input:focus-visible,
.form-textarea:focus-visible,
.form-select:focus-visible,
.btn-submit:focus-visible {
    outline: 3px solid var(--form-primary-color);
    outline-offset: 2px;
}

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

.form-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
}