/**
 * MortgageCalc Design System
 * Color: White + Green, Professional, Clean
 */

:root {
    /* Colors */
    --primary: #16A34A;
    --primary-dark: #15803D;
    --primary-light: #DCFCE7;
    --white: #FFFFFF;
    --off-white: #F8FAFC;
    --dark-text: #1E293B;
    --body-text: #475569;
    --light-border: #E2E8F0;
    --accent: #0EA5E9;
    --accent-light: #E0F2FE;

    /* Typography */
    --font-heading: 'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --container-width: 1200px;
    --section-gap: 4rem;
    --card-radius: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-hover: 0 10px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.08);

    /* Transitions */
    --transition: all 0.2s ease;
}

/* ========== RESET ========== */
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; font-family: var(--font-body); background: var(--white); color: var(--body-text); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 700; color: var(--dark-text); margin: 0 0 1rem; line-height: 1.3; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; }
ul { margin: 0; padding: 0; }
p { margin: 0 0 1rem; }

/* ========== LAYOUT ========== */
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 1.5rem; }

/* ========== HEADER ========== */
.site-header {
    background: var(--white);
    border-bottom: 1px solid var(--light-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}
.site-header.header-scrolled {
    box-shadow: var(--shadow-md);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 0;
    gap: 1.5rem;
}
.site-branding { flex-shrink: 0; }
.site-logo { height: 36px; width: auto; display: block; }
.logo-link { display: flex; align-items: center; }

/* Navigation */
.main-navigation { flex: 1; display: flex; justify-content: center; }
.main-navigation ul { display: flex; list-style: none; gap: 0.25rem; margin: 0; padding: 0; align-items: center; }
.main-navigation .menu-item a {
    color: var(--dark-text);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 0.875rem;
    border-radius: 8px;
    transition: var(--transition);
    display: block;
}
.main-navigation .menu-item a:hover,
.main-navigation .menu-item.current-menu-item a {
    color: var(--primary);
    background: var(--primary-light);
}

/* Dropdown */
.main-navigation .menu-item-has-children { position: relative; }
.main-navigation .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    border: 1px solid var(--light-border);
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-lg);
    min-width: 220px;
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 100;
}
.main-navigation .menu-item-has-children:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.main-navigation .sub-menu .menu-item a {
    font-size: 0.85rem;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
}

/* Hamburger */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    flex-direction: column;
    gap: 5px;
}
.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* Header Search */
.header-search { position: relative; }
.header-search-toggle {
    background: var(--off-white);
    border: 1px solid var(--light-border);
    border-radius: 8px;
    padding: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    color: var(--body-text);
    transition: var(--transition);
}
.header-search-toggle:hover { border-color: var(--primary); color: var(--primary); }
.header-search-form {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 320px;
    display: none;
}
.header-search-form.active { display: block; }
.header-search-form input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--primary);
    border-radius: var(--card-radius);
    font-size: 0.9rem;
    font-family: var(--font-body);
    outline: none;
    box-shadow: var(--shadow-lg);
}

/* Search Dropdown Results */
.search-results-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border: 1px solid var(--light-border);
    border-radius: 0 0 var(--card-radius) var(--card-radius);
    box-shadow: var(--shadow-lg);
    max-height: 400px;
    overflow-y: auto;
    z-index: 1001;
    display: none;
}
.search-results-dropdown.active { display: block; }
.search-result-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--light-border);
    cursor: pointer;
    transition: var(--transition);
    gap: 0.75rem;
    text-decoration: none;
    color: var(--dark-text);
}
.search-result-item:hover { background: var(--primary-light); }
.search-result-item:last-child { border-bottom: none; }
.search-result-name { font-weight: 600; font-size: 0.9rem; }
.search-result-desc { font-size: 0.8rem; color: var(--body-text); }
.search-result-category {
    font-size: 0.7rem;
    background: var(--primary-light);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 4px;
    margin-left: auto;
    white-space: nowrap;
}

/* AI Smart Search */
.smart-search-result {
    padding: 1rem;
    background: var(--accent-light);
    border-bottom: 1px solid var(--light-border);
    font-size: 0.9rem;
    color: var(--dark-text);
}
.smart-search-result a { font-weight: 600; }

/* ========== HERO SECTION ========== */
.hero-section {
    background: var(--white);
    padding: 4rem 1rem 3rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--light-border);
}
.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, var(--primary-light) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: 0.5;
}
.hero-title {
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--dark-text);
    margin-bottom: 1rem;
    position: relative;
}
.hero-subtitle {
    font-size: 1.1rem;
    color: var(--body-text);
    max-width: 640px;
    margin: 0 auto 2rem;
    position: relative;
}

/* Hero Search */
.hero-search { max-width: 600px; margin: 0 auto 2rem; position: relative; z-index: 10; }
.search-wrapper { position: relative; }
.search-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--body-text);
    display: flex;
}
#hero-search-input {
    width: 100%;
    padding: 1rem 1.5rem 1rem 3.5rem;
    border: 2px solid var(--light-border);
    border-radius: 60px;
    font-size: 1rem;
    font-family: var(--font-body);
    outline: none;
    transition: var(--transition);
    background: var(--white);
    box-shadow: var(--shadow-sm);
}
#hero-search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(22, 163, 74, 0.1);
}
.hero-search .search-results-dropdown {
    border-radius: var(--card-radius);
    margin-top: 0.5rem;
}

/* Hero Badges */
.hero-badges {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    position: relative;
}
.hero-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 0.5rem 1rem;
    border-radius: 60px;
}
.badge-icon { display: flex; }

/* ========== STATS BAR ========== */
.stats-bar {
    background: var(--primary);
    padding: 1.25rem 0;
}
.stats-grid {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}
.stat-item { text-align: center; color: var(--white); }
.stat-number { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 800; display: block; }
.stat-label { font-size: 0.8rem; opacity: 0.9; }

/* ========== CATEGORY SECTIONS ========== */
.category-section {
    padding: var(--section-gap) 0 0;
}
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}
.section-title-wrap {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.section-icon { display: flex; }
.section-title {
    font-size: 1.5rem;
    margin: 0;
}
.view-all-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
}
.view-all-btn:hover { background: var(--primary-light); }

/* ========== TOOL CARDS ========== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}
.tools-grid-full {
    grid-template-columns: repeat(3, 1fr);
}
.tool-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--white);
    border: 1px solid var(--light-border);
    border-radius: var(--card-radius);
    transition: var(--transition);
    text-decoration: none;
    color: var(--dark-text);
}
.tool-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}
.tool-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tool-card-content { flex: 1; min-width: 0; }
.tool-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0 0 0.25rem;
    color: var(--dark-text);
}
.tool-card-desc {
    font-size: 0.8rem;
    color: var(--body-text);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.tool-card-arrow {
    color: var(--body-text);
    opacity: 0;
    transition: var(--transition);
    flex-shrink: 0;
}
.tool-card:hover .tool-card-arrow { opacity: 1; color: var(--primary); }

/* ========== BREADCRUMB ========== */
.breadcrumb {
    padding: 1rem 0;
    font-size: 0.85rem;
    color: var(--body-text);
}
.breadcrumb a { color: var(--body-text); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep { margin: 0 0.5rem; color: var(--light-border); }
.breadcrumb-current { color: var(--dark-text); font-weight: 500; }

/* ========== CALCULATOR PAGE ========== */
.calc-page-header { margin-bottom: 2rem; }
.calc-page-title { font-size: 2rem; margin-bottom: 0.5rem; }
.calc-page-intro { font-size: 1.05rem; color: var(--body-text); margin-bottom: 0.75rem; }
.calc-page-meta { display: flex; gap: 1rem; font-size: 0.85rem; color: var(--body-text); }
.calc-page-meta a { color: var(--primary); }
.meta-updated::before { content: '📅 '; }

/* Two Column */
.calc-layout { display: flex; gap: 2rem; align-items: flex-start; }
.calc-main-col { flex: 1; min-width: 0; }
.calc-sidebar-col { width: 340px; flex-shrink: 0; position: sticky; top: 80px; }

/* ========== CONTENT SECTION ========== */
.calc-content-section {
    background: var(--white);
    border: 1px solid var(--light-border);
    border-radius: var(--card-radius);
    padding: 2rem;
    margin: 2rem 0;
}
.calc-content-section h2 {
    font-size: 1.4rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-light);
    margin-top: 2rem;
}
.calc-content-section h2:first-child { margin-top: 0; }
.calc-content-section h3 { font-size: 1.1rem; margin-top: 1.5rem; }
.calc-content-section ul, .calc-content-section ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}
.calc-content-section li { margin-bottom: 0.5rem; }
.calc-content-section code {
    font-family: var(--font-mono);
    background: var(--off-white);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

/* FAQ */
.calc-faq-section {
    background: var(--white);
    border: 1px solid var(--light-border);
    border-radius: var(--card-radius);
    padding: 2rem;
    margin: 2rem 0;
}
.calc-faq-section > h2 { font-size: 1.4rem; margin-bottom: 1.5rem; }
.faq-item {
    border-bottom: 1px solid var(--light-border);
    padding: 1.25rem 0;
}
.faq-item:last-child { border-bottom: none; }
.faq-question { font-size: 1rem; margin: 0 0 0.5rem; color: var(--dark-text); }
.faq-answer p { margin: 0; color: var(--body-text); font-size: 0.95rem; }

/* ========== ARCHIVE ========== */
.archive-header { text-align: center; margin-bottom: 2rem; padding: 2rem 0; }
.archive-icon { margin-bottom: 1rem; }
.archive-title { font-size: 2rem; }
.archive-description { color: var(--body-text); max-width: 600px; margin: 0 auto; }

/* ========== PAGE CONTENT ========== */
.page-content-box {
    background: var(--white);
    border: 1px solid var(--light-border);
    border-radius: var(--card-radius);
    padding: 2rem;
}
.page-content-box h2 { margin-top: 2rem; font-size: 1.3rem; }
.page-content-box h2:first-child { margin-top: 0; }

/* ========== SIDEBAR ========== */
.sidebar { }
.ad-unit {
    background: var(--off-white);
    border: 1px dashed var(--light-border);
    border-radius: var(--card-radius);
    margin-bottom: 1.5rem;
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.ad-leaderboard { min-height: 90px; margin: 2rem 0; }
.ad-placeholder { color: var(--light-border); font-size: 0.8rem; text-align: center; }

.sidebar-widget {
    background: var(--white);
    border: 1px solid var(--light-border);
    border-radius: var(--card-radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}
.widget-title {
    font-size: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--primary-light);
}
.related-calcs-list { list-style: none; }
.related-calcs-list li { margin-bottom: 0.5rem; }
.related-calcs-list li a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--dark-text);
    font-size: 0.9rem;
    padding: 0.5rem;
    border-radius: 8px;
    transition: var(--transition);
}
.related-calcs-list li a:hover { background: var(--primary-light); color: var(--primary); }
.related-icon { color: var(--primary); display: flex; }

/* ========== RELATED SECTION ========== */
.related-calcs-section {
    padding: var(--section-gap) 0;
    border-top: 1px solid var(--light-border);
    margin-top: var(--section-gap);
}
.related-calcs-section .section-title { margin-bottom: 1.5rem; }

/* ========== FOOTER ========== */
.site-footer {
    background: #1E293B;
    color: #94A3B8;
    padding: 3rem 0 0;
    margin-top: var(--section-gap);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 2rem;
}
.footer-logo { margin-bottom: 1rem; }
.footer-column h3 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 1rem;
    font-weight: 600;
}
.footer-column ul { list-style: none; }
.footer-column ul li { margin-bottom: 0.5rem; }
.footer-column ul li a {
    color: #94A3B8;
    font-size: 0.9rem;
    transition: var(--transition);
}
.footer-column ul li a:hover { color: var(--white); padding-left: 4px; }
.footer-column p { font-size: 0.9rem; line-height: 1.7; }

.footer-bottom {
    border-top: 1px solid #334155;
    margin-top: 2rem;
    padding: 1.25rem 0;
}
.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}
.footer-bottom p { margin: 0; }
.footer-credit a { color: #94A3B8; }
.footer-credit a:hover { color: var(--primary); }

/* ========== ERROR 404 ========== */
.error-404 { text-align: center; padding: 4rem 0; }
.error-title { font-size: 6rem; color: var(--primary-light); font-weight: 800; margin-bottom: 0; line-height: 1; }
.error-404 h2 { font-size: 1.5rem; margin-bottom: 1rem; }
.error-404 p { color: var(--body-text); max-width: 500px; margin: 0 auto 2rem; }
.error-links { margin-top: 3rem; }
.error-links h3 { margin-bottom: 1.5rem; }

/* ========== SEARCH FORM ========== */
.search-form { margin: 1.5rem 0; }
.search-form-inner { display: flex; position: relative; max-width: 500px; margin: 0 auto; }
.search-form-icon { position: absolute; left: 1rem; top: 50%; transform: translateY(-50%); color: var(--body-text); display: flex; }
.search-field {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border: 2px solid var(--light-border);
    border-radius: var(--card-radius) 0 0 var(--card-radius);
    font-size: 0.95rem;
    font-family: var(--font-body);
    outline: none;
    transition: var(--transition);
}
.search-field:focus { border-color: var(--primary); }
.search-submit {
    background: var(--primary);
    color: var(--white);
    border: 2px solid var(--primary);
    border-radius: 0 var(--card-radius) var(--card-radius) 0;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}
.search-submit:hover { background: var(--primary-dark); border-color: var(--primary-dark); }

/* ========== CATEGORY CHIPS ========== */
.category-links { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; margin-top: 1.5rem; }
.category-link-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--off-white);
    border: 1px solid var(--light-border);
    border-radius: 60px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--dark-text);
    transition: var(--transition);
}
.category-link-chip:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* ========== NO RESULTS ========== */
.no-results { text-align: center; padding: 3rem 0; color: var(--body-text); }
.no-results-box { text-align: center; padding: 3rem 0; }
.no-results-box h2 { margin-bottom: 0.5rem; }

/* ========== SCREEN READER ========== */
.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute !important;
    width: 1px;
    word-wrap: normal !important;
}