/* =====================
   Nutrify Shared Styles
   shared-styles.css
   
   Include this file in all HTML pages:
   <link rel="stylesheet" href="shared-styles.css">
   ===================== */

/* =====================
   CSS Custom Properties (Light Mode - Default)
   ===================== */
:root {
    /* Background colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #eeeeee;
    
    /* Text colors */
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-muted: #888888;
    
    /* Link colors */
    --link-color: #0066cc;
    --link-hover: #0052a3;
    
    /* UI elements */
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* Modal/Lightbox */
    --modal-bg: rgba(0, 0, 0, 0.9);
    --modal-close-color: #f1f1f1;
    
    /* Carousel navigation */
    --carousel-btn-bg: rgba(0, 0, 0, 0.5);
    --carousel-btn-bg-hover: rgba(0, 0, 0, 0.7);
    --carousel-btn-color: #ffffff;
    
    /* Accent colors */
    --accent-primary: #4CAF50;
    --accent-secondary: #FFC107;
}

/* =====================
   Dark Mode
   ===================== */
@media (prefers-color-scheme: dark) {
    :root {
        /* Background colors */
        --bg-primary: #1a1a1a;
        --bg-secondary: #2d2d2d;
        --bg-tertiary: #3a3a3a;
        
        /* Text colors */
        --text-primary: #e8e8e8;
        --text-secondary: #b0b0b0;
        --text-muted: #888888;
        
        /* Link colors */
        --link-color: #6cb3ff;
        --link-hover: #8fc7ff;
        
        /* UI elements */
        --border-color: #404040;
        --shadow-color: rgba(0, 0, 0, 0.4);
        
        /* Modal/Lightbox */
        --modal-bg: rgba(0, 0, 0, 0.95);
        --modal-close-color: #ffffff;
        
        /* Carousel navigation */
        --carousel-btn-bg: rgba(255, 255, 255, 0.2);
        --carousel-btn-bg-hover: rgba(255, 255, 255, 0.35);
        --carousel-btn-color: #ffffff;
        
        /* Accent colors */
        --accent-primary: #66BB6A;
        --accent-secondary: #FFD54F;
    }
}

/* =====================
   Base Element Styles
   ===================== */
* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Links */
a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
}

/* Paragraphs and text */
p, li, span {
    color: var(--text-primary);
}

/* Strong/bold text */
strong, b {
    color: var(--text-primary);
}

/* Emphasized text */
em, i {
    color: var(--text-secondary);
}

/* =====================
   Common UI Components
   ===================== */

/* TL;DR / Info boxes */
.tldr-box,
.info-box {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    padding: 15px 20px;
    margin: 15px 0;
    border: 1px solid var(--border-color);
}

.tldr-box p,
.info-box p {
    margin: 0;
}

.tldr-box ul,
.info-box ul {
    margin-bottom: 0;
}

/* Image captions */
.img_caption {
    color: var(--text-secondary);
}

/* Footer text */
.footer {
    color: var(--text-muted);
}

/* =====================
   Modal/Lightbox Styles
   ===================== */
.modal,
.lightbox-modal {
    background-color: var(--modal-bg);
}

.modal-close,
.close {
    color: var(--modal-close-color);
    transition: color 0.3s;
}

.modal-close:hover,
.close:hover {
    color: var(--text-muted);
}

/* =====================
   Carousel Styles
   ===================== */
.prev, .next,
.modal-prev, .modal-next {
    background: var(--carousel-btn-bg);
    color: var(--carousel-btn-color);
}

.prev:hover, .next:hover,
.modal-prev:hover, .modal-next:hover {
    background: var(--carousel-btn-bg-hover);
}

/* =====================
   App Store Button - Invert in Dark Mode
   ===================== */
@media (prefers-color-scheme: dark) {
    .app-store-btn {
        filter: invert(1) hue-rotate(180deg);
    }
}

/* =====================
   Clickable Images
   ===================== */
.clickable-image {
    cursor: pointer;
    transition: opacity 0.3s;
}

.clickable-image:hover {
    opacity: 0.8;
}

/* =====================
   Utility Classes
   ===================== */
.text-muted {
    color: var(--text-muted);
}

.text-secondary {
    color: var(--text-secondary);
}

.bg-secondary {
    background-color: var(--bg-secondary);
}

.bg-tertiary {
    background-color: var(--bg-tertiary);
}