/* RationalDog Base Styles - Professional Truth-Focused Design */

:root {
    /* Core Brand Colors */
    --primary-black: #000000;
    --secondary-black: #1a1a1a;
    --tertiary-black: #2a2a2a;
    --pure-white: #ffffff;
    --off-white: #fafafa;
    --light-grey: #f5f5f5;
    --medium-grey: #e5e5e5;
    --border-grey: #d0d0d0;
    --text-grey: #666666;
    --subtle-grey: #999999;
    --accent-orange: #FF6B35;
    --accent-gold: #F7931E;
    
    /* Truth-indicating colors */
    --truth-high: #0D7377;
    --truth-medium: #14A085;
    --truth-low: #F4A261;
    --truth-false: #E76F51;
    --emotive-color: #E76F51;
    --opinion-color: #F4A261;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Monaco', monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.12);
}

/* Import professional typography */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    height: 100%;
}

body {
    font-family: var(--font-primary);
    background: var(--off-white);
    color: var(--primary-black);
    line-height: 1.5;
    font-size: 14px;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Remove background pattern for cleaner look */
body::before {
    display: none;
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.2;
    margin: 0;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
    margin: 0;
    line-height: 1.6;
}

/* Header Styles - Ground.news inspired */
header {
    background: var(--pure-white);
    border-bottom: 1px solid var(--border-grey);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.top-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

header {
    padding: var(--spacing-md) 0;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

/* Professional Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--primary-black);
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.logo::before {
    content: '';
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-gold));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.logo::after {
    content: '✓';
    position: absolute;
    left: 9px;
    font-size: 14px;
    font-weight: 800;
    color: var(--pure-white);
}

/* Navigation */
nav.main-nav {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
}

nav.main-nav a {
    text-decoration: none;
    color: var(--text-grey);
    font-size: 13px;
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
    transition: color 0.2s ease;
    letter-spacing: 0.01em;
}

nav.main-nav a:hover {
    color: var(--primary-black);
}

nav.main-nav a.active {
    color: var(--primary-black);
}

nav.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-orange);
    border-radius: 1px;
}

/* Header Right Section */
.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-search {
    border: 1px solid var(--border-grey);
    background: var(--light-grey);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    width: 200px;
    font-size: 13px;
    outline: none;
    transition: all 0.2s ease;
}

.header-search:focus {
    border-color: var(--accent-orange);
    background: var(--pure-white);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

.header-search::placeholder {
    color: var(--subtle-grey);
    font-weight: 400;
}

.subscribe, .login {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    letter-spacing: 0.01em;
}

.subscribe {
    background: var(--primary-black);
    color: var(--pure-white);
    box-shadow: var(--shadow-sm);
}

.subscribe:hover {
    background: var(--secondary-black);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.login {
    border: 1px solid var(--border-grey);
    color: var(--primary-black);
    background: var(--pure-white);
}

.login:hover {
    border-color: var(--primary-black);
    box-shadow: var(--shadow-sm);
}

/* Topics Bar - More Subtle */
.topics-bar {
    background: var(--light-grey);
    border-bottom: 1px solid var(--medium-grey);
    padding: var(--spacing-sm) 0;
}

.topics-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.topics-inner::-webkit-scrollbar {
    display: none;
}

.topics-inner a {
    text-decoration: none;
    color: var(--text-grey);
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.topics-inner a:hover {
    color: var(--primary-black);
    background: var(--pure-white);
}

/* Loading States */
.loading-indicator {
    display: none;
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-grey);
}

.loading-indicator.active {
    display: block;
}

.spinner {
    border: 2px solid var(--medium-grey);
    border-top: 2px solid var(--accent-orange);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-indicator p {
    font-size: 13px;
    font-weight: 500;
    color: var(--subtle-grey);
}

/* Error and Success Messages */
.error-message, .success-message {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
    display: none;
    font-size: 13px;
    font-weight: 500;
}

.error-message {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.success-message {
    background: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.error-message.active, .success-message.active {
    display: block;
}

/* Main content area flex */
main {
    flex: 1 0 auto;
}

/* Footer Styles */
.site-footer {
    background: var(--primary-black);
    color: var(--pure-white);
    margin-top: auto;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    flex-shrink: 0;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.02em;
}

.footer-section h4 {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--subtle-grey);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-section p {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-grey);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section ul li a {
    color: var(--text-grey);
    text-decoration: none;
    font-size: 12px;
    transition: color 0.2s ease;
    font-weight: 400;
}

.footer-section ul li a:hover {
    color: var(--pure-white);
}

.footer-bottom {
    border-top: 1px solid var(--tertiary-black);
    padding-top: var(--spacing-md);
    text-align: center;
    font-size: 11px;
    color: var(--subtle-grey);
    font-weight: 400;
}

/* Utility Classes */
.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;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Spacing utilities */
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* Professional button styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: var(--primary-black);
    color: var(--pure-white);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--secondary-black);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--pure-white);
    color: var(--primary-black);
    border-color: var(--border-grey);
}

.btn-secondary:hover {
    border-color: var(--primary-black);
    box-shadow: var(--shadow-sm);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .top-container {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    nav.main-nav {
        order: 3;
        width: 100%;
        justify-content: center;
        padding-top: var(--spacing-sm);
        border-top: 1px solid var(--medium-grey);
        gap: var(--spacing-lg);
    }
    
    .header-right {
        gap: var(--spacing-sm);
    }
    
    .header-search {
        width: 150px;
    }
    
    .topics-inner {
        padding: 0 var(--spacing-md);
        justify-content: flex-start;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .top-container {
        padding: 0 var(--spacing-md);
    }
    
    header {
        padding: var(--spacing-sm) 0;
    }
    
    .logo {
        font-size: 1.125rem;
    }
    
    .header-search {
        width: 120px;
        font-size: 12px;
    }
    
    nav.main-nav {
        gap: var(--spacing-md);
    }
    
    nav.main-nav a {
        font-size: 12px;
    }
}