/* ============================================================
   TABLE OF CONTENTS:
   1. CSS VARIABLES (Theming & Easy Customization)
   2. RESET & BASE STYLES (Improved Normalization)
   3. LAYOUT & STRUCTURE (Enhanced Grid/Flex)
   4. TYPOGRAPHY (Modern & Accessible)
   5. MAIN CONTENT COMPONENTS (Tables, Forms, Posts)
   6. PUNBB SPECIFIC SECTIONS (Header, Nav, Footer)
   7. UTILITIES & HELPERS
   8. RESPONSIVE DESIGN (Mobile First)
   ============================================================ */

/* ============================================================
   1. CSS VARIABLES
   Centralized design tokens for easy theming.
   Change values here to update the entire forum style.
   ============================================================ */
:root {
    /* Color Palette - Modern & Accessible */
    --color-primary: #2c3e50;      /* Dark blue-gray for main accents */
    --color-primary-light: #34495e;
    --color-primary-dark: #1a2632;
    --color-secondary: #e67e22;     /* Warm orange for highlights & links */
    --color-secondary-light: #f39c12;
    --color-success: #27ae60;
    --color-warning: #e67e22;
    --color-danger: #e74c3c;
    --color-info: #3498db;
    
    /* Neutrals */
    --color-text: #2c3e50;
    --color-text-light: #7f8c8d;
    --color-text-inverse: #ecf0f1;
    --color-bg: #ecf0f1;            /* Main background */
    --color-bg-surface: #ffffff;     /* Cards, containers */
    --color-bg-surface-alt: #f8f9fa;
    --color-border: #dcdde1;
    --color-border-dark: #bdc3c7;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-focus: 0 0 0 3px rgba(52, 152, 219, 0.4);
    
    /* Spacing System (rem-based) */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-8: 3rem;
    
    /* Typography */
    --font-sans: system-ui, -apple-system, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
    --font-size-base: 87.5%; /* 14px base */
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-loose: 1.75;
    
    /* Borders */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-full: 9999px;
}

/* Dark Mode Preference (Optional but Awesome) */
@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #3498db;
        --color-primary-light: #5dade2;
        --color-primary-dark: #2c81ba;
        --color-text: #ecf0f1;
        --color-text-light: #bdc3c7;
        --color-bg: #1a1e24;
        --color-bg-surface: #2c3e50;
        --color-bg-surface-alt: #243342;
        --color-border: #3a4b5e;
        --color-border-dark: #4a5e74;
        --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
    }
}

/* ============================================================
   2. RESET & BASE STYLES
   Modern CSS reset with improved defaults
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

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

/* Improved focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--color-info);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* PunBB Container */
.punbb {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-4);
}

/* Image handling */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Lists */
ul, ol {
    list-style: none;
}

/* Tables - Modern approach */
table {
    border-collapse: collapse;
    width: 100%;
}

/* ============================================================
   3. LAYOUT & STRUCTURE
   Grid and Flexbox based layout
   ============================================================ */
#pun {
    background: var(--color-bg-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

/* Section containers */
.punbb .section,
.punbb .main {
    margin-bottom: var(--space-5);
}

.punbb .container {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-surface);
    transition: box-shadow 0.2s ease;
}

.punbb .container:hover {
    box-shadow: var(--shadow-sm);
}

/* Clearfix - modern alternative */
.punbb .clearfix::after {
    content: "";
    display: table;
    clear: both;
}

/* ============================================================
   4. TYPOGRAPHY
   Improved text styles
   ============================================================ */
.punbb h1, .punbb h2, .punbb h3, 
.punbb h4, .punbb .category h2 {
    font-weight: 600;
    line-height: var(--line-height-tight);
    color: var(--color-primary);
}

.punbb h1 { font-size: 1.75rem; margin-bottom: var(--space-4); }
.punbb h2 { font-size: 1.5rem; margin-bottom: var(--space-3); }
.punbb h3 { font-size: 1.25rem; margin-bottom: var(--space-2); }

.punbb a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color 0.2s ease, text-decoration 0.2s ease;
}

.punbb a:hover {
    color: var(--color-secondary-light);
    text-decoration: underline;
}

/* Post content */
.punbb .post-content {
    font-size: 1rem;
    line-height: var(--line-height-loose);
}

.punbb .post-content p {
    margin-bottom: var(--space-4);
}

/* Code blocks */
.punbb pre, 
.punbb .code-box {
    background: var(--color-bg-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Blockquotes */
.punbb blockquote {
    border-left: 4px solid var(--color-secondary);
    background: var(--color-bg-surface-alt);
    padding: var(--space-3) var(--space-4);
    margin: var(--space-4) 0;
    border-radius: var(--radius-md);
    font-style: italic;
}

/* ============================================================
   5. MAIN CONTENT COMPONENTS
   ============================================================ */

/* --- TABLES (Forum listing) --- */
.punbb .main table {
    width: 100%;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.punbb .main th {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--space-3) var(--space-4);
    font-weight: 600;
    text-align: left;
}

.punbb .main td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.punbb .main tr:last-child td {
    border-bottom: none;
}

.punbb .main tr:hover td {
    background: var(--color-bg-surface-alt);
}

/* Topic icons */
.punbb div.icon {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: var(--radius-full);
    background: var(--color-text-light);
}

.punbb .icon-new {
    background: var(--color-success);
}

.punbb .icon-hot {
    background: var(--color-danger);
}

/* --- FORMS --- */
.punbb .formal {
    background: var(--color-bg-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
}

.punbb fieldset {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin-bottom: var(--space-5);
}

.punbb legend {
    padding: 0 var(--space-3);
    font-weight: 600;
    color: var(--color-primary);
    font-size: 1.1rem;
}

.punbb .datafield {
    margin-bottom: var(--space-4);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
}

.punbb .datafield label {
    flex: 0 0 150px;
    font-weight: 600;
}

.punbb input[type="text"],
.punbb input[type="password"],
.punbb input[type="email"],
.punbb select,
.punbb textarea {
    flex: 1;
    min-width: 200px;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-surface);
    color: var(--color-text);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.punbb input:focus,
.punbb select:focus,
.punbb textarea:focus {
    border-color: var(--color-info);
    box-shadow: var(--shadow-focus);
    outline: none;
}

.punbb textarea {
    min-height: 120px;
    resize: vertical;
}

.punbb button,
.punbb .formsubmit input[type="submit"],
.punbb .formsubmit input[type="button"] {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border: none;
    padding: var(--space-2) var(--space-5);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.punbb button:hover,
.punbb .formsubmit input:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
}

/* --- POSTS (Topic View) --- */
.punbb .post {
    margin-bottom: var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-surface);
}

.punbb .post h3 {
    background: var(--color-bg-surface-alt);
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
}

.punbb .post-author {
    float: left;
    width: 200px;
    padding: var(--space-4);
    background: var(--color-bg-surface-alt);
    text-align: center;
    border-right: 1px solid var(--color-border);
}

.punbb .post-body {
    margin-left: 200px;
    padding: var(--space-4);
}

.punbb .post-links {
    margin-left: 200px;
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-surface-alt);
    border-top: 1px solid var(--color-border);
    text-align: right;
}

/* Responsive posts */
@media (max-width: 768px) {
    .punbb .post-author,
    .punbb .post-body,
    .punbb .post-links {
        float: none;
        margin-left: 0;
        width: 100%;
    }
    
    .punbb .post-author {
        border-right: none;
        border-bottom: 1px solid var(--color-border);
        text-align: left;
    }
}

/* Pagination */
.punbb .pagelink {
    display: inline-flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.punbb .pagelink a,
.punbb .pagelink span {
    padding: var(--space-1) var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.punbb .pagelink a:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

.punbb .pagelink .current {
    background: var(--color-secondary);
    color: var(--color-text-inverse);
    border-color: var(--color-secondary);
}

/* ============================================================
   6. PUNBB SPECIFIC SECTIONS
   Header, Navigation, Footer
   ============================================================ */

/* Header / Title */
#pun-title {
    background: var(--color-primary-dark);
    padding: var(--space-4);
    text-align: center;
}

#pun-title h1 {
    margin: 0;
    font-size: 2rem;
}

#pun-title h1 a {
    color: var(--color-text-inverse);
    text-decoration: none;
}

#pun-title h1 a:hover {
    color: var(--color-secondary-light);
}

/* Navigation */
#pun-navlinks {
    background: var(--color-primary);
    padding: var(--space-2) var(--space-4);
}

#pun-navlinks ul {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    justify-content: center;
}

#pun-navlinks li a {
    color: var(--color-text-inverse);
    font-weight: 600;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: background 0.2s;
}

#pun-navlinks li a:hover {
    background: rgba(255,255,255,0.1);
    text-decoration: none;
}

/* User Links */
#pun-ulinks {
    background: var(--color-bg-surface-alt);
    padding: var(--space-2) var(--space-4);
    border-bottom: 1px solid var(--color-border);
}

#pun-ulinks ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: var(--space-2);
}

#pun-ulinks li {
    border-left: 1px solid var(--color-border);
}

#pun-ulinks li:first-child {
    border-left: none;
}

#pun-ulinks a {
    padding: var(--space-1) var(--space-3);
    display: inline-block;
}

/* Breadcrumbs */
#pun-crumbs1,
#pun-crumbs2 {
    background: var(--color-bg-surface-alt);
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}

#pun-crumbs1 a,
#pun-crumbs2 a {
    color: var(--color-text-light);
}

/* Statistics */
#pun-stats {
    background: var(--color-bg-surface-alt);
    border-top: 1px solid var(--color-border);
    padding: var(--space-4);
}

#pun-stats ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-3);
}

/* Footer */
#pun-about {
    background: var(--color-primary-dark);
    color: var(--color-text-inverse);
    text-align: center;
    padding: var(--space-4);
    font-size: 0.85rem;
}

#pun-about a {
    color: var(--color-secondary-light);
}

/* ============================================================
   7. UTILITIES & HELPERS
   ============================================================ */
.acchide,
.punbb .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;
}

/* Message boxes */
.punbb .info-box {
    background: var(--color-bg-surface-alt);
    border-left: 4px solid var(--color-info);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.punbb .info-box.error {
    border-left-color: var(--color-danger);
    background: rgba(231, 76, 60, 0.1);
}

.punbb .info-box.success {
    border-left-color: var(--color-success);
}

/* ============================================================
   8. RESPONSIVE DESIGN
   Mobile-first adjustments
   ============================================================ */
@media (max-width: 768px) {
    .punbb {
        padding: var(--space-2);
    }
    
    #pun {
        border-radius: var(--radius-md);
    }
    
    .punbb .formal {
        padding: var(--space-4);
    }
    
    .punbb .datafield {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .punbb .datafield label {
        flex: none;
    }
    
    .punbb .datafield input,
    .punbb .datafield select,
    .punbb .datafield textarea {
        width: 100%;
    }
    
    .punbb .main th,
    .punbb .main td {
        padding: var(--space-2);
    }
    
    /* Make tables scrollable on mobile */
    .punbb .main table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
    
    #pun-navlinks ul {
        gap: var(--space-2);
        justify-content: flex-start;
    }
    
    #pun-ulinks ul {
        justify-content: flex-start;
    }
}

/* Print styles */
@media print {
    .punbb .post-links,
    #pun-navlinks,
    #pun-ulinks,
    .punbb .modmenu,
    .punbb .formsubmit {
        display: none;
    }
    
    body, .punbb, #pun {
        background: white;
        color: black;
    }
    
    a {
        text-decoration: underline;
        color: black;
    }
}