/* ============================================
   PennyExplained.com - Main Stylesheet
   Minimalist Personal Finance Website
   ============================================ */

/* ============================================
   CSS RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background: #ffffff;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: #1f2937;
}

h1 { font-size: 2.5rem; }      /* 40px */
h2 { font-size: 2rem; }        /* 32px */
h3 { font-size: 1.5rem; }      /* 24px */
h4 { font-size: 1.25rem; }     /* 20px */
h5 { font-size: 1.125rem; }    /* 18px */
h6 { font-size: 1rem; }        /* 16px */

p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

a {
    color: #f59e0b;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #d97706;
    text-decoration: underline;
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.content-wrapper {
    max-width: 750px;
    margin: 0 auto;
}

.section-spacing {
    padding: 4rem 0;
}

.section-spacing-sm {
    padding: 2rem 0;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.site-header {
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo img {
    height: 40px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
}

.logo-text span {
    color: #f59e0b;
}

/* Navigation */
.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.main-nav a {
    color: #1f2937;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.3s ease;
}

.main-nav a:hover {
    color: #f59e0b;
    text-decoration: none;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #1f2937;
    cursor: pointer;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.75rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.hero p {
    font-size: 1.25rem;
    color: #64748b;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    background: #f59e0b;
    color: #1f2937;
    padding: 0.875rem 2rem;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid #f59e0b;
}

.cta-button:hover {
    background: #d97706;
    border-color: #d97706;
    text-decoration: none;
    transform: translateY(-2px);
}

.cta-button-secondary {
    background: transparent;
    border: 2px solid #1f2937;
    color: #1f2937;
}

.cta-button-secondary:hover {
    background: #1f2937;
    color: #ffffff;
}

/* ============================================
   FEATURED CALCULATOR (Homepage)
   ============================================ */
.featured-calculator {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 2rem;
    margin: 3rem auto;
    max-width: 600px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.featured-calculator h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #1f2937;
}

/* ============================================
   CATEGORY CARDS (Browse by Topic)
   ============================================ */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.category-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    border-color: #f59e0b;
    text-decoration: none;
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.category-card h3 {
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.category-card p {
    color: #64748b;
    margin-bottom: 0;
    font-size: 0.9375rem;
}

/* ============================================
   ARTICLE CARDS
   ============================================ */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.article-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
}

.article-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border-color: #f59e0b;
    text-decoration: none;
}

.article-card h3 {
    color: #1f2937;
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.article-card p {
    color: #64748b;
    margin-bottom: 0.75rem;
    font-size: 0.9375rem;
}

.article-meta {
    font-size: 0.875rem;
    color: #94a3b8;
}

/* ============================================
   ARTICLE PAGE LAYOUT
   ============================================ */
.article-header {
    max-width: 750px;
    margin: 3rem auto 2rem;
    text-align: center;
}

.article-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.article-intro {
    font-size: 1.125rem;
    color: #64748b;
    line-height: 1.7;
}

.article-content {
    max-width: 750px;
    margin: 0 auto;
    font-size: 1.125rem;
    line-height: 1.8;
    padding: 2rem 1.5rem;
}

.article-content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-top: 1rem;
}

.article-content h3 {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.article-content ul,
.article-content ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content strong {
    font-weight: 600;
    color: #1f2937;
}

/* Table of Contents */
.table-of-contents {
    background: #f8fafc;
    border-left: 4px solid #f59e0b;
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 4px;
}

.table-of-contents h3 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    margin-top: 0;
}

.table-of-contents ul {
    list-style: none;
    padding-left: 0;
}

.table-of-contents li {
    margin-bottom: 0.5rem;
}

.table-of-contents a {
    color: #1f2937;
}

/* ============================================
   CALCULATOR COMPONENTS
   ============================================ */
.calculator-container {
    max-width: 650px;
    margin: 3rem auto;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.calculator-container h1 {
    text-align: center;
    margin-bottom: 0.5rem;
}

.calculator-intro {
    text-align: center;
    color: #64748b;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #f59e0b;
}

.btn-calculate {
    width: 100%;
    background: #f59e0b;
    color: #1f2937;
    padding: 1rem;
    border: none;
    border-radius: 6px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.btn-calculate:hover {
    background: #d97706;
    transform: translateY(-2px);
}

.result-box {
    margin-top: 2rem;
    padding: 2rem;
    background: #f0fdf4;
    border: 2px solid #10b981;
    border-radius: 8px;
    text-align: center;
}

.result-box.hidden {
    display: none;
}

.result-label {
    font-size: 1rem;
    color: #64748b;
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: #10b981;
}

.result-breakdown {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #d1fae5;
    text-align: left;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    font-size: 1rem;
}

.breakdown-item span:first-child {
    color: #64748b;
}

.breakdown-item span:last-child {
    font-weight: 600;
    color: #1f2937;
}

/* ============================================
   AD PLACEMENT ZONES
   ============================================ */
.ad-container {
    margin: 2rem auto;
    text-align: center;
}

.ad-placeholder {
    background: #f8fafc;
    border: 2px dashed #e2e8f0;
    border-radius: 4px;
    padding: 2rem 1rem;
    color: #94a3b8;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Ad positions */
.ad-leaderboard {
    max-width: 728px;
    height: 90px;
    margin: 1.5rem auto;
}

.ad-rectangle {
    max-width: 300px;
    height: 250px;
    margin: 1.5rem auto;
}

.ad-large-rectangle {
    max-width: 336px;
    height: 280px;
    margin: 1.5rem auto;
}

/* Sidebar ad (desktop) */
.sidebar-ad {
    position: sticky;
    top: 100px;
}

/* ============================================
   SIDEBAR LAYOUT (Article Pages)
   ============================================ */
.article-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.article-main {
    min-width: 0;
}

.article-sidebar {
    display: none; /* Hidden on mobile */
}

/* ============================================
   RELATED ARTICLES
   ============================================ */
.related-articles {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 2px solid #e2e8f0;
}

.related-articles h2 {
    margin-bottom: 2rem;
}

/* ============================================
   CONTACT FORM
   ============================================ */
.contact-form {
    max-width: 600px;
    margin: 2rem auto;
}

.contact-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    min-height: 150px;
    resize: vertical;
}

.contact-form textarea:focus {
    outline: none;
    border-color: #f59e0b;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: #1f2937;
    color: #ffffff;
    padding: 3rem 0 1.5rem;
    margin-top: 5rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: #f59e0b;
    margin-bottom: 1rem;
    font-size: 1rem;
}

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

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #e2e8f0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #f59e0b;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1.5rem;
    text-align: center;
    color: #9ca3af;
    font-size: 0.875rem;
}

/* ============================================
   LEGAL PAGES (Privacy, Terms, etc.)
   ============================================ */
.legal-content {
    max-width: 800px;
    margin: 3rem auto;
    padding: 0 1.5rem;
}

.legal-content h1 {
    margin-bottom: 1rem;
}

.legal-content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.legal-content p {
    margin-bottom: 1.25rem;
    line-height: 1.7;
}

.legal-content ul {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.legal-content li {
    margin-bottom: 0.5rem;
}

.last-updated {
    color: #64748b;
    font-size: 0.875rem;
    font-style: italic;
    margin-bottom: 2rem;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (min-width: 768px) {
    .article-sidebar {
        display: block;
    }
}

/* Mobile */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.375rem; }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.125rem;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #ffffff;
        border-top: 1px solid #e2e8f0;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }
    
    .main-nav.active {
        display: block;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
        padding: 1rem;
    }
    
    .main-nav li {
        width: 100%;
        padding: 0.75rem 0;
        border-bottom: 1px solid #e2e8f0;
    }
    
    .main-nav li:last-child {
        border-bottom: none;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .article-layout {
        grid-template-columns: 1fr;
    }
    
    .article-content {
        font-size: 1rem;
    }
    
    .calculator-container {
        padding: 1.5rem;
    }
    
    .result-value {
        font-size: 2rem;
    }
}

/* Small mobile */
@media (max-width: 480px) {
    .section-spacing {
        padding: 2rem 0;
    }
    
    .featured-calculator {
        padding: 1.5rem;
    }
    
    .category-card {
        padding: 1.5rem;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden {
    display: none;
}

.visible {
    display: block;
}