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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --text-light: #94a3b8;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-gray);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

/* ===== Header ===== */
.site-header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.site-logo {
    height: 50px;
    width: auto;
}

.logo-link {
    display: inline-block;
}

.main-nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-gray);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color);
}

/* ===== Top Search Section ===== */
.top-search-section {
    background: #ffffff;
    padding: 2.5rem 0;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.search-title {
    text-align: center;
    font-size: 1.75rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.search-subtitle {
    text-align: center;
    color: var(--text-gray);
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.top-search-form {
    position: relative;
    max-width: 700px;
    margin: 0 auto 1rem;
}

.search-note {
    text-align: center;
    color: var(--text-light);
    font-size: 0.875rem;
    max-width: 700px;
    margin: 0 auto;
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Hero Search Box ===== */
.hero-search-box {
    margin: 2.5rem 0;
}

.hero-search-form {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    transition: all 0.3s ease;
}

.search-input-wrapper:focus-within {
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.3);
    transform: translateY(-2px);
}

.search-icon {
    position: absolute;
    left: 1.25rem;
    font-size: 1.25rem;
    pointer-events: none;
    z-index: 1;
}

.hero-search-input {
    flex: 1;
    padding: 1.25rem 1.5rem 1.25rem 3.5rem;
    border: none;
    font-size: 1rem;
    color: var(--text-dark);
    outline: none;
}

.hero-search-input::placeholder {
    color: var(--text-light);
}

.hero-search-btn {
    padding: 1.25rem 2.5rem;
    background: var(--secondary-color);
    color: white;
    border: none;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.hero-search-btn:hover {
    background: #059669;
}

/* Search Suggestions Dropdown */
.search-suggestions {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    max-height: 400px;
    overflow-y: auto;
    z-index: 100;
    display: none;
}

.search-suggestions.active {
    display: block;
}

.suggestion-item {
    padding: 1rem 1.5rem;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s ease;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.suggestion-item:last-child {
    border-bottom: none;
}

.suggestion-item:hover,
.suggestion-item.active {
    background: var(--bg-light);
}

.suggestion-icon {
    font-size: 1.25rem;
    opacity: 0.6;
}

.suggestion-content {
    flex: 1;
}

.suggestion-name {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.suggestion-details {
    font-size: 0.875rem;
    color: var(--text-gray);
}

.suggestion-category {
    font-size: 0.75rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Popular Searches */
.popular-searches {
    margin-top: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.popular-label {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    font-weight: 500;
}

.popular-tag {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.popular-tag:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #059669;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: white;
    color: var(--primary-color);
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: transparent;
    color: white;
    border-color: white;
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

/* ===== Content Sections ===== */
section {
    padding: 4rem 0;
}

.why-section {
    background-color: var(--bg-light);
}

.content-block {
    max-width: 900px;
    margin: 0 auto 2rem;
}

.content-block p {
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.content-block h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
}

section h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.25rem;
}

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.feature-card p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* ===== Checklist ===== */
.checklist {
    list-style: none;
    margin: 1.5rem 0;
}

.checklist li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-gray);
    line-height: 1.7;
}

.checklist li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.checklist li strong {
    color: var(--text-dark);
}

/* ===== Process Steps ===== */
.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
    padding: 1.5rem;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

.step h4 {
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.step p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* ===== Tips Box ===== */
.tips-box {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem 2rem;
    border-radius: 0.5rem;
    margin: 2rem 0;
}

.tips-box h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tips-box ul {
    list-style-position: inside;
    color: var(--text-gray);
}

.tips-box li {
    padding: 0.5rem 0;
    line-height: 1.7;
}

/* ===== Search Tool ===== */
.search-tool {
    background: white;
    padding: 3rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    margin-top: 3rem;
    text-align: center;
}

.search-tool h3 {
    margin-bottom: 1rem;
}

.search-tool > p {
    margin-bottom: 2rem;
    color: var(--text-gray);
}

.search-form {
    display: flex;
    gap: 1rem;
    max-width: 600px;
    margin: 0 auto 1.5rem;
}

.search-input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-note {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0;
}

/* ===== Issues Grid ===== */
.issues-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.issue-card {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border-left: 4px solid var(--primary-color);
}

.issue-card h4 {
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.issue-card p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* ===== FAQ Section ===== */
.faq-section {
    background-color: var(--bg-light);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    padding: 1.5rem 2rem;
    border-radius: 0.75rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s ease;
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.faq-item p {
    margin-bottom: 0;
    line-height: 1.7;
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, #1e40af 0%, #2563eb 100%);
    color: white;
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-content h2 {
    color: white;
    margin-bottom: 1.5rem;
}

.cta-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin-bottom: 2rem;
    line-height: 1.8;
}

/* ===== Related Keywords ===== */
.keywords-section {
    background-color: var(--bg-light);
    padding: 3rem 0;
}

.keywords-section h3 {
    text-align: center;
    margin-bottom: 2rem;
}

.keywords-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    max-width: 800px;
    margin: 0 auto;
}

.keywords-links a {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: white;
    border-radius: 2rem;
    color: var(--text-gray);
    font-size: 0.95rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.keywords-links a:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== Footer ===== */
.site-footer {
    background-color: var(--text-dark);
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
}

.footer-section p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: var(--text-light);
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0;
}

.footer-bottom a {
    color: var(--text-light);
}

.footer-bottom a:hover {
    color: white;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .hero {
        padding: 2.5rem 0;
    }
    
    .top-search-section {
        padding: 2rem 0;
    }
    
    .search-title {
        font-size: 1.5rem;
    }

    .main-nav {
        display: none;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    section {
        padding: 3rem 0;
    }

    .search-form {
        flex-direction: column;
    }

    .search-input {
        width: 100%;
    }

    .search-tool {
        padding: 2rem 1.5rem;
    }
    
    .search-input-wrapper {
        flex-direction: column;
    }
    
    .hero-search-input {
        padding: 1rem 1rem 1rem 3rem;
    }
    
    .hero-search-btn {
        width: 100%;
        padding: 1rem;
    }
    
    .popular-searches {
        flex-direction: column;
        gap: 0.5rem;
    }

    .features-grid,
    .process-steps,
    .issues-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .content-block p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    h1 {
        font-size: 1.75rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    section h2 {
        font-size: 1.5rem;
    }

    .site-logo {
        height: 40px;
    }

    .header-content {
        padding: 0.75rem 0;
    }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus states for keyboard navigation */
a:focus,
button:focus,
input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .site-header,
    .hero-cta,
    .search-tool,
    .cta-section,
    .keywords-section,
    .site-footer {
        display: none;
    }
}