/* ==========================================================================
   INSIDE USA TOOLS - Global CSS Stylesheet (Clean UI, High Performance)
   ========================================================================== */

/* Typography import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800;900&display=swap');

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --usa-blue: #0f1e36; /* Slate-dark navy */
    --usa-blue-light: #1e3a8a;
    --usa-red: #cc1100; /* USA Cardinal Red */
    --usa-red-hover: #a30e00;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --accent-light: rgba(30, 58, 138, 0.05);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1240px;
}

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

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--usa-blue-light);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--usa-red);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 60px 0;
}

/* Header Styles */
.header-wrapper {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    background-color: var(--usa-blue);
    color: #ffffff;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Outfit', sans-serif;
    font-weight: 900;
    font-size: 1.25rem;
    border-bottom: 3px solid var(--usa-red);
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--usa-blue);
    display: flex;
    align-items: center;
}

.logo-text span {
    color: var(--usa-red);
}

.nav-menu {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-link:hover, .nav-link.active {
    color: var(--usa-blue);
}

/* Hamburger toggle for mobile */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    padding: 5px;
}

/* Hero Section */
.hero {
    background: radial-gradient(circle at 10% 20%, rgba(30,58,138,0.03) 0%, rgba(204,17,0,0.01) 90%);
    border-bottom: 1px solid var(--border-color);
    padding: 70px 0;
    text-align: center;
}

.hero-title {
    font-family: 'Outfit', sans-serif;
    font-size: 2.75rem;
    font-weight: 900;
    color: var(--usa-blue);
    margin-bottom: 15px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto 35px auto;
}

/* Search bar positioning */
.search-wrapper {
    max-width: 550px;
    margin: 0 auto;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 16px 20px 16px 50px;
    font-size: 1.05rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition);
    outline: none;
    box-shadow: var(--shadow);
}

.search-input:focus {
    border-color: var(--usa-blue-light);
    box-shadow: 0 0 0 4px rgba(30, 58, 138, 0.1);
}

.search-icon-svg {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

/* Categories Section */
.categories-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
}

.filter-btn {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 8px 18px;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--usa-blue);
    border-color: var(--usa-blue);
    color: #ffffff;
}

/* Dashboard Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.tool-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.tool-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--usa-blue-light);
}

.tool-card-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--usa-red);
    margin-bottom: 10px;
}

.tool-card-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--usa-blue);
    margin-bottom: 10px;
    line-height: 1.3;
}

.tool-card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    flex-grow: 1;
}

.tool-card-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--usa-blue-light);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.tool-card-link svg {
    transition: var(--transition);
}

.tool-card:hover .tool-card-link svg {
    transform: translateX(3px);
}

/* Dynamic Tool Layout (tool.php) */
.tool-page-wrapper {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

@media (max-width: 992px) {
    .tool-page-wrapper {
        grid-template-columns: 1fr;
    }
}

.tool-main-panel {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 35px;
    box-shadow: var(--shadow);
}

@media (max-width: 576px) {
    .tool-main-panel {
        padding: 20px;
    }
}

.tool-header {
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.tool-badge {
    display: inline-block;
    padding: 4px 10px;
    background-color: var(--accent-light);
    color: var(--usa-blue-light);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    margin-bottom: 15px;
    text-transform: uppercase;
}

.tool-title-page {
    font-family: 'Outfit', sans-serif;
    font-size: 2.25rem;
    font-weight: 900;
    color: var(--usa-blue);
    line-height: 1.2;
    margin-bottom: 10px;
}

.tool-intro {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Generic Form Control Styling */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.95rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--usa-blue-light);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.08);
}

.btn-calc {
    display: inline-block;
    width: 100%;
    padding: 14px 20px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    color: #ffffff;
    background-color: var(--usa-red);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.btn-calc:hover {
    background-color: var(--usa-red-hover);
}

/* Custom Calculator UI Layouts */
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

@media (max-width: 768px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
}

.calculator-results {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 25px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.result-heading {
    font-family: 'Outfit', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--usa-blue);
    margin-bottom: 20px;
    border-bottom: 1.5px solid var(--border-color);
    padding-bottom: 10px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px dashed var(--border-color);
}

.result-row:last-child {
    border-bottom: none;
}

.result-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.result-val {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.result-val.primary {
    color: var(--usa-blue-light);
    font-size: 1.3rem;
}

.result-val.alert {
    color: var(--usa-red);
}

.result-val.success {
    color: #10b981;
}

/* SEO Content Section (FAQs, How-to, Formulas) */
.seo-content-block {
    margin-top: 50px;
    border-top: 1px solid var(--border-color);
    padding-top: 40px;
}

.seo-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--usa-blue);
    margin-bottom: 15px;
}

.seo-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.seo-text p {
    margin-bottom: 15px;
}

.seo-formula-box {
    background-color: var(--bg-secondary);
    border-left: 4px solid var(--usa-blue-light);
    padding: 15px 20px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-family: monospace;
    font-size: 1rem;
    margin-bottom: 25px;
    color: var(--usa-blue);
    font-weight: bold;
}

/* FAQ Accordion in SEO block */
.faq-accordion {
    margin-top: 25px;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
    background-color: var(--bg-primary);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 15px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--text-secondary);
}

.faq-item.active .faq-question::after {
    content: '-';
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease-out;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.faq-item.active .faq-answer {
    padding: 0 20px 15px 20px;
    max-height: 200px;
}

/* Sidebar layout */
.sidebar-panel {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.sidebar-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow);
}

.sidebar-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--usa-blue);
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.sidebar-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sidebar-item {
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Footer Section */
.footer-wrapper {
    background-color: var(--usa-blue);
    color: #ffffff;
    padding: 50px 0 20px 0;
    margin-top: 80px;
    border-top: 4px solid var(--usa-red);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-col h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #ffffff;
}

.footer-col p {
    font-size: 0.85rem;
    color: #94a3b8;
    line-height: 1.5;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col ul a {
    color: #94a3b8;
    font-size: 0.85rem;
}

.footer-col ul a:hover {
    color: #ffffff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: #94a3b8;
}

.footer-links-bottom {
    display: flex;
    gap: 20px;
}

.footer-links-bottom a {
    color: #94a3b8;
    font-size: 0.8rem;
}

.footer-links-bottom a:hover {
    color: #ffffff;
}

/* Mobile responsive menu animation */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--bg-primary);
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        gap: 15px;
        box-shadow: var(--shadow-md);
    }
    
    .nav-menu.active {
        display: flex;
    }
}

/* Table styling for calculator outputs */
.calc-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
    font-size: 0.85rem;
}

.calc-table th, .calc-table td {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.calc-table th {
    background-color: var(--bg-secondary);
    color: var(--usa-blue);
    font-weight: 600;
}