/* css/cms-base.css */
/* Base styles extracted for CMS Content (Blogs & Papers) */

/* --- Consistent Variables --- */
:root {
    /* Core Palette */
    --cms-primary: #1a3263; /* Deep Blue */
    --cms-secondary: #00a0b0; /* Teal */
    --cms-accent: #ffc107; /* Yellow */
    --cms-light-gray: #f8f9fa; /* Section backgrounds */
    --cms-medium-gray: #e9ecef; /* Borders */
    --cms-dark-gray: #333; /* Darker text */
    --cms-white: #ffffff;
    
    /* Dark Theme Palette */
    --cms-dark-primary: #63b3ed;
    --cms-dark-secondary: #4fd1c5;
    --cms-dark-accent: #f6ad55;
    --cms-dark-bg: #1a202c;
    --cms-dark-section-bg: #2d3748;
    --cms-dark-border: rgba(255, 255, 255, 0.12);
    --cms-dark-text: rgba(255, 255, 255, 0.87);
    --cms-dark-light-text: rgba(255, 255, 255, 0.6);

    /* Typography */
    --cms-font-body: 'Open Sans', sans-serif;
    --cms-font-heading: 'Montserrat', sans-serif;
    --cms-font-serif: 'Merriweather', serif;
    --cms-font-code: 'Roboto Mono', monospace;
    --cms-base-font-size: 16px; 
    --cms-line-height-base: 1.7; 
    
    /* Spacing & Radius */
    --cms-spacing-unit: 1rem;
    --cms-radius: 8px; 
    
    /* Shadows & Transitions */
    --cms-shadow-soft: 0 4px 15px rgba(0, 0, 0, 0.08);
    --cms-shadow-medium: 0 6px 20px rgba(0, 0, 0, 0.12);
    --cms-transition: all 0.3s ease;

    /* --- Overridable Theme Variables --- */
    /* These are set based on the light theme by default */
    --primary-color: var(--cms-primary);
    --secondary-color: var(--cms-secondary);
    --accent-color: var(--cms-accent);
    --bg-color: var(--cms-white);
    --section-bg-color: var(--cms-light-gray);
    --border-color: var(--cms-medium-gray);
    --text-color: var(--cms-dark-gray);
    --light-text-color: #666; /* Specific light text */
    --shadow: var(--cms-shadow-soft);

    /* Code Highlighting (Light Theme) */
    --code-bg: #f8f9fa;
    --code-text: #2c3e50;
    --code-border: #e0e0e0; 
    --code-keyword: #d73a49;
    --code-string: #032f62;
    --code-comment: #6a737d;
    --code-function: #6f42c1;
    --code-number: #005cc5;
    --code-operator: #d73a49;
    --code-punctuation: #24292e;
}

/* Apply dark theme variables when data-theme="dark" */
html[data-theme="dark"] {
    --primary-color: var(--cms-dark-primary);
    --secondary-color: var(--cms-dark-secondary);
    --accent-color: var(--cms-dark-accent);
    --bg-color: var(--cms-dark-bg);
    --section-bg-color: var(--cms-dark-section-bg);
    --border-color: var(--cms-dark-border);
    --text-color: var(--cms-dark-text);
    --light-text-color: var(--cms-dark-light-text);
    --shadow: var(--cms-shadow-medium);

    /* Code Highlighting (Dark Theme) */
    --code-bg: var(--cms-dark-section-bg); 
    --code-text: var(--cms-dark-text);
    --code-border: var(--cms-dark-border);
    --code-keyword: #ff79c6; 
    --code-string: #f1fa8c; 
    --code-comment: #6272a4; 
    --code-function: #bd93f9; 
    --code-number: #ffb86c; 
    --code-operator: #ff79c6;
    --code-punctuation: #f8f8f2; 
}

/* --- Base Element Styling --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth; 
    font-size: var(--cms-base-font-size); 
}

body {
    font-family: var(--cms-font-body);
    color: var(--text-color); /* Use theme variable */
    line-height: var(--cms-line-height-base);
    background-color: var(--bg-color); /* Use theme variable */
    transition: background-color 0.3s ease, color 0.3s ease; 
    -webkit-font-smoothing: antialiased; 
    -moz-osx-font-smoothing: grayscale;
}

/* Basic heading styles (specifics in blog/paper css) */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--cms-font-heading);
    font-weight: 700;
    line-height: 1.3; 
    margin-bottom: var(--cms-spacing-unit); 
    color: var(--primary-color); /* Use theme primary */
}

p {
    margin-bottom: var(--cms-spacing-unit);
}

a {
    color: var(--secondary-color); /* Use theme secondary */
    text-decoration: none; 
    transition: var(--cms-transition);
}

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

ul, ol {
    margin-bottom: var(--cms-spacing-unit);
    padding-left: calc(var(--cms-spacing-unit) * 1.5);
}

li {
    margin-bottom: calc(var(--cms-spacing-unit) * 0.5);
}

img {
    max-width: 100%;
    height: auto;
    display: block; 
    border-radius: var(--cms-radius); 
}

/* Basic container - can be overridden */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--cms-spacing-unit); 
}

/* Basic code styling */
code {
    font-family: var(--cms-font-code);
    background-color: var(--code-bg);
    color: var(--code-text);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9em;
    border: 1px solid var(--code-border);
}

pre {
    font-family: var(--cms-font-code);
    background-color: var(--code-bg);
    color: var(--code-text);
    padding: 1.2em;
    border-radius: var(--cms-radius);
    border: 1px solid var(--code-border);
    overflow-x: auto;
    margin: calc(var(--cms-spacing-unit) * 1.5) 0;
    font-size: 0.9em;
}

pre code {
    background-color: transparent;
    padding: 0;
    border: none;
    color: inherit; /* Inherit color from pre */
}

/* Basic table styling */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--cms-spacing-unit);
}

th, td {
    padding: calc(var(--cms-spacing-unit) * 0.75);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

thead th {
    font-weight: 600;
    background-color: var(--section-bg-color);
    border-bottom-width: 2px;
}

/* --- Accessibility Focus Styling --- */
:focus-visible {
    outline: 3px solid var(--secondary-color);
    outline-offset: 2px;
    border-radius: 2px;
}

/* --- Selection Styling --- */
::selection {
    background-color: var(--secondary-color);
    color: var(--bg-color); /* Ensure contrast */
}

/* Ensure html element gets the theme */
html {
    background-color: var(--bg-color);
    color: var(--text-color);
}