/**
 * RegrowProtocol Main Stylesheet
 * Additional component styles and enhancements
 *
 * @package RegrowProtocol
 * @since 1.0.0
 */

/* ==========================================================================
   CSS Custom Properties (Variables)
   ========================================================================== */

:root {
    /* Colors */
    --rg-primary: #2E7D32;
    --rg-primary-dark: #1B5E20;
    --rg-primary-light: #4CAF50;
    --rg-secondary: #1976D2;
    --rg-secondary-dark: #0D47A1;
    --rg-accent: #FF9800;
    --rg-accent-dark: #F57C00;
    
    /* Neutrals */
    --rg-text: #212121;
    --rg-text-light: #757575;
    --rg-text-muted: #9E9E9E;
    --rg-border: #E0E0E0;
    --rg-border-light: #F5F5F5;
    --rg-bg: #FFFFFF;
    --rg-bg-alt: #FAFAFA;
    --rg-bg-dark: #F5F5F5;
    
    /* Semantic Colors */
    --rg-success: #43A047;
    --rg-warning: #FB8C00;
    --rg-error: #E53935;
    --rg-info: #1E88E5;
    
    /* Spacing */
    --rg-space-xs: 0.25rem;
    --rg-space-sm: 0.5rem;
    --rg-space-md: 1rem;
    --rg-space-lg: 1.5rem;
    --rg-space-xl: 2rem;
    --rg-space-2xl: 3rem;
    --rg-space-3xl: 4rem;
    
    /* Typography */
    --rg-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --rg-font-serif: 'Merriweather', Georgia, serif;
    --rg-font-mono: 'Fira Code', 'Consolas', monospace;
    
    /* Font Sizes */
    --rg-text-xs: 0.75rem;
    --rg-text-sm: 0.875rem;
    --rg-text-base: 1rem;
    --rg-text-lg: 1.125rem;
    --rg-text-xl: 1.25rem;
    --rg-text-2xl: 1.5rem;
    --rg-text-3xl: 1.875rem;
    --rg-text-4xl: 2.25rem;
    
    /* Border Radius */
    --rg-radius-sm: 0.25rem;
    --rg-radius-md: 0.5rem;
    --rg-radius-lg: 0.75rem;
    --rg-radius-xl: 1rem;
    --rg-radius-full: 9999px;
    
    /* Shadows */
    --rg-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --rg-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --rg-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --rg-shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --rg-transition-fast: 150ms ease;
    --rg-transition-base: 250ms ease;
    --rg-transition-slow: 350ms ease;
    
    /* Z-index */
    --rg-z-dropdown: 100;
    --rg-z-sticky: 200;
    --rg-z-modal: 300;
    --rg-z-tooltip: 400;
}

/* ==========================================================================
   Base Enhancements
   ========================================================================== */

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--rg-font-sans);
    color: var(--rg-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Focus Styles for Accessibility */
:focus-visible {
    outline: 2px solid var(--rg-primary);
    outline-offset: 2px;
}

/* Skip Link */
.rg-skip-link {
    position: absolute;
    top: -100%;
    left: var(--rg-space-md);
    background: var(--rg-primary);
    color: white;
    padding: var(--rg-space-sm) var(--rg-space-md);
    border-radius: var(--rg-radius-md);
    z-index: var(--rg-z-tooltip);
    transition: top var(--rg-transition-fast);
}

.rg-skip-link:focus {
    top: var(--rg-space-md);
}

/* ==========================================================================
   Container
   ========================================================================== */

.rg-container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--rg-space-md);
    padding-right: var(--rg-space-md);
}

@media (min-width: 768px) {
    .rg-container {
        padding-left: var(--rg-space-lg);
        padding-right: var(--rg-space-lg);
    }
}

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

.rg-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--rg-space-sm);
    padding: var(--rg-space-sm) var(--rg-space-lg);
    font-family: var(--rg-font-sans);
    font-size: var(--rg-text-base);
    font-weight: 600;
    line-height: 1.5;
    text-decoration: none;
    border-radius: var(--rg-radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--rg-transition-fast);
}

.rg-btn:hover {
    transform: translateY(-1px);
}

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

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

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

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

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

.rg-btn--accent {
    background: var(--rg-accent);
    color: white;
    border-color: var(--rg-accent);
}

.rg-btn--accent:hover {
    background: var(--rg-accent-dark);
    border-color: var(--rg-accent-dark);
}

.rg-btn--lg {
    padding: var(--rg-space-md) var(--rg-space-xl);
    font-size: var(--rg-text-lg);
}

.rg-btn--sm {
    padding: var(--rg-space-xs) var(--rg-space-md);
    font-size: var(--rg-text-sm);
}

.rg-btn--block {
    display: flex;
    width: 100%;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.rg-card {
    background: var(--rg-bg);
    border-radius: var(--rg-radius-lg);
    box-shadow: var(--rg-shadow-md);
    overflow: hidden;
    transition: all var(--rg-transition-base);
}

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

.rg-card__image {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.rg-card__content {
    padding: var(--rg-space-lg);
}

.rg-card__title {
    margin: 0 0 var(--rg-space-sm);
    font-size: var(--rg-text-xl);
    font-weight: 700;
    color: var(--rg-text);
}

.rg-card__excerpt {
    margin: 0 0 var(--rg-space-md);
    color: var(--rg-text-light);
    font-size: var(--rg-text-sm);
}

.rg-card__meta {
    display: flex;
    align-items: center;
    gap: var(--rg-space-md);
    font-size: var(--rg-text-xs);
    color: var(--rg-text-muted);
}

/* ==========================================================================
   Hub Cards
   ========================================================================== */

.rg-hub-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--rg-space-xl);
    background: var(--rg-bg);
    border-radius: var(--rg-radius-lg);
    text-decoration: none;
    text-align: center;
    box-shadow: var(--rg-shadow-sm);
    border: 1px solid var(--rg-border-light);
    transition: all var(--rg-transition-base);
}

.rg-hub-card:hover {
    box-shadow: var(--rg-shadow-lg);
    transform: translateY(-4px);
    border-color: var(--rg-primary-light);
}

.rg-hub-card__icon {
    font-size: 3rem;
    margin-bottom: var(--rg-space-md);
}

.rg-hub-card__title {
    margin: 0 0 var(--rg-space-xs);
    font-size: var(--rg-text-lg);
    font-weight: 700;
    color: var(--rg-text);
}

.rg-hub-card__count {
    font-size: var(--rg-text-sm);
    color: var(--rg-text-muted);
}

/* ==========================================================================
   Tool Cards
   ========================================================================== */

.rg-tool-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: var(--rg-space-xl);
    background: linear-gradient(135deg, var(--rg-primary) 0%, var(--rg-primary-dark) 100%);
    border-radius: var(--rg-radius-lg);
    color: white;
    text-decoration: none;
    overflow: hidden;
    transition: all var(--rg-transition-base);
}

.rg-tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 150px;
    height: 150px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(30%, -30%);
}

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

.rg-tool-card__icon {
    font-size: 2.5rem;
    margin-bottom: var(--rg-space-md);
}

.rg-tool-card__title {
    margin: 0 0 var(--rg-space-sm);
    font-size: var(--rg-text-xl);
    font-weight: 700;
}

.rg-tool-card__desc {
    margin: 0;
    font-size: var(--rg-text-sm);
    opacity: 0.9;
}

.rg-tool-card--secondary {
    background: linear-gradient(135deg, var(--rg-secondary) 0%, var(--rg-secondary-dark) 100%);
}

/* ==========================================================================
   Article Styles
   ========================================================================== */

.rg-article {
    max-width: 800px;
    margin: 0 auto;
}

.rg-article__header {
    margin-bottom: var(--rg-space-2xl);
}

.rg-article__title {
    margin: 0 0 var(--rg-space-md);
    font-size: var(--rg-text-4xl);
    font-weight: 800;
    line-height: 1.2;
}

.rg-article__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--rg-space-md);
    font-size: var(--rg-text-sm);
    color: var(--rg-text-light);
}

.rg-article__content {
    font-family: var(--rg-font-serif);
    font-size: var(--rg-text-lg);
    line-height: 1.8;
}

.rg-article__content h2 {
    margin: var(--rg-space-2xl) 0 var(--rg-space-md);
    font-family: var(--rg-font-sans);
    font-size: var(--rg-text-2xl);
    font-weight: 700;
}

.rg-article__content h3 {
    margin: var(--rg-space-xl) 0 var(--rg-space-sm);
    font-family: var(--rg-font-sans);
    font-size: var(--rg-text-xl);
    font-weight: 600;
}

.rg-article__content p {
    margin: 0 0 var(--rg-space-lg);
}

.rg-article__content a {
    color: var(--rg-primary);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 2px;
}

.rg-article__content a:hover {
    color: var(--rg-primary-dark);
}

.rg-article__content ul,
.rg-article__content ol {
    margin: 0 0 var(--rg-space-lg);
    padding-left: var(--rg-space-xl);
}

.rg-article__content li {
    margin-bottom: var(--rg-space-sm);
}

.rg-article__content blockquote {
    margin: var(--rg-space-xl) 0;
    padding: var(--rg-space-lg);
    background: var(--rg-bg-alt);
    border-left: 4px solid var(--rg-primary);
    border-radius: 0 var(--rg-radius-md) var(--rg-radius-md) 0;
    font-style: italic;
}

.rg-article__content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--rg-radius-md);
    margin: var(--rg-space-lg) 0;
}

/* ==========================================================================
   Table of Contents
   ========================================================================== */

.rg-toc {
    background: var(--rg-bg-alt);
    border-radius: var(--rg-radius-lg);
    padding: var(--rg-space-lg);
    margin-bottom: var(--rg-space-2xl);
}

.rg-toc__title {
    margin: 0 0 var(--rg-space-md);
    font-size: var(--rg-text-lg);
    font-weight: 700;
}

.rg-toc__list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.rg-toc__item {
    margin-bottom: var(--rg-space-sm);
}

.rg-toc__link {
    display: block;
    padding: var(--rg-space-xs) 0;
    color: var(--rg-text);
    text-decoration: none;
    font-size: var(--rg-text-sm);
    transition: color var(--rg-transition-fast);
}

.rg-toc__link:hover {
    color: var(--rg-primary);
}

.rg-toc__item--h3 .rg-toc__link {
    padding-left: var(--rg-space-md);
    font-size: var(--rg-text-xs);
    color: var(--rg-text-light);
}

/* ==========================================================================
   Takeaways Box
   ========================================================================== */

.rg-takeaways {
    background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
    border-radius: var(--rg-radius-lg);
    padding: var(--rg-space-xl);
    margin: var(--rg-space-xl) 0;
}

.rg-takeaways__title {
    display: flex;
    align-items: center;
    gap: var(--rg-space-sm);
    margin: 0 0 var(--rg-space-md);
    font-size: var(--rg-text-lg);
    font-weight: 700;
    color: var(--rg-primary-dark);
}

.rg-takeaways__title::before {
    content: '\2714';
}

.rg-takeaways__content ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.rg-takeaways__content li {
    position: relative;
    padding-left: var(--rg-space-lg);
    margin-bottom: var(--rg-space-sm);
}

.rg-takeaways__content li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: var(--rg-primary);
    font-weight: 700;
}

/* ==========================================================================
   Medical Disclaimer
   ========================================================================== */

.rg-disclaimer {
    background: #FFF3E0;
    border: 1px solid #FFE0B2;
    border-radius: var(--rg-radius-md);
    padding: var(--rg-space-lg);
    margin: var(--rg-space-xl) 0;
    font-size: var(--rg-text-sm);
}

.rg-disclaimer__title {
    display: flex;
    align-items: center;
    gap: var(--rg-space-sm);
    margin: 0 0 var(--rg-space-sm);
    font-size: var(--rg-text-base);
    font-weight: 700;
    color: var(--rg-warning);
}

.rg-disclaimer__title::before {
    content: '\26A0';
}

.rg-disclaimer__content {
    color: var(--rg-text-light);
    line-height: 1.6;
}

/* ==========================================================================
   Email Capture Form
   ========================================================================== */

.rg-email-form {
    background: var(--rg-bg);
    border-radius: var(--rg-radius-lg);
    padding: var(--rg-space-xl);
    box-shadow: var(--rg-shadow-md);
}

.rg-email-form__title {
    margin: 0 0 var(--rg-space-sm);
    font-size: var(--rg-text-xl);
    font-weight: 700;
}

.rg-email-form__desc {
    margin: 0 0 var(--rg-space-lg);
    color: var(--rg-text-light);
    font-size: var(--rg-text-sm);
}

.rg-email-form__fields {
    display: flex;
    flex-direction: column;
    gap: var(--rg-space-md);
}

@media (min-width: 640px) {
    .rg-email-form__fields {
        flex-direction: row;
    }
}

.rg-email-form__input {
    flex: 1;
    padding: var(--rg-space-md);
    font-size: var(--rg-text-base);
    border: 2px solid var(--rg-border);
    border-radius: var(--rg-radius-md);
    transition: border-color var(--rg-transition-fast);
}

.rg-email-form__input:focus {
    outline: none;
    border-color: var(--rg-primary);
}

.rg-email-form__consent {
    display: flex;
    align-items: flex-start;
    gap: var(--rg-space-sm);
    margin-top: var(--rg-space-md);
    font-size: var(--rg-text-xs);
    color: var(--rg-text-muted);
}

.rg-email-form__consent input {
    margin-top: 3px;
}

/* ==========================================================================
   Newsletter Section
   ========================================================================== */

.rg-newsletter-section {
    background: linear-gradient(135deg, var(--rg-primary) 0%, var(--rg-primary-dark) 100%);
    padding: var(--rg-space-3xl) 0;
    color: white;
    text-align: center;
}

.rg-newsletter-section .rg-email-form {
    max-width: 600px;
    margin: 0 auto;
}

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

.rg-footer {
    background: var(--rg-text);
    color: white;
    padding: var(--rg-space-3xl) 0 var(--rg-space-xl);
}

.rg-footer__grid {
    display: grid;
    gap: var(--rg-space-2xl);
}

@media (min-width: 768px) {
    .rg-footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .rg-footer__grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.rg-footer__heading {
    margin: 0 0 var(--rg-space-md);
    font-size: var(--rg-text-lg);
    font-weight: 700;
}

.rg-footer__list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.rg-footer__list li {
    margin-bottom: var(--rg-space-sm);
}

.rg-footer__list a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: var(--rg-text-sm);
    transition: color var(--rg-transition-fast);
}

.rg-footer__list a:hover {
    color: white;
}

.rg-footer__bottom {
    margin-top: var(--rg-space-2xl);
    padding-top: var(--rg-space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: var(--rg-text-sm);
    color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.rg-animate-fade-in {
    animation: fadeIn var(--rg-transition-base) ease-out;
}

.rg-animate-fade-in-up {
    animation: fadeInUp var(--rg-transition-slow) ease-out;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.rg-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.rg-text-center {
    text-align: center;
}

.rg-text-primary {
    color: var(--rg-primary);
}

.rg-mb-0 { margin-bottom: 0; }
.rg-mb-sm { margin-bottom: var(--rg-space-sm); }
.rg-mb-md { margin-bottom: var(--rg-space-md); }
.rg-mb-lg { margin-bottom: var(--rg-space-lg); }
.rg-mb-xl { margin-bottom: var(--rg-space-xl); }

/* ==========================================================================
   Loading States
   ========================================================================== */

.rg-loading {
    position: relative;
    pointer-events: none;
}

.rg-loading::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
}

.rg-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--rg-border);
    border-top-color: var(--rg-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .rg-header,
    .rg-footer,
    .rg-toc,
    .rg-email-form,
    .rg-btn {
        display: none !important;
    }
    
    .rg-article__content {
        font-size: 12pt;
    }
    
    a[href]::after {
        content: ' (' attr(href) ')';
        font-size: 0.8em;
        color: #666;
    }
}