/* ==========================================================================
   Name Combiner - Modern SaaS CSS Design System
   Mobile-First, Responsive, Fast & Accessible
   ========================================================================== */

:root {
    --primary: #6366F1;
    --primary-hover: #4F46E5;
    --purple: #8B5CF6;
    --pink: #EC4899;
    --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #EC4899 100%);
    --gradient-hover: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #DB2777 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
    
    --bg-main: #F8FAFC;
    --bg-card: #FFFFFF;
    --bg-input: #F1F5F9;
    
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    
    --border-color: #E2E8F0;
    --border-hover: #CBD5E1;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 25px -5px rgba(99, 102, 241, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --shadow-card: 0 20px 40px -15px rgba(15, 23, 42, 0.07);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-full: 9999px;

    --transition: all 0.2s ease-in-out;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

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

ul {
    list-style: none;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* Layout Utilities */
.site-main {
    flex: 1;
}

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

.section {
    padding: 4rem 0;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1.75rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    font-size: 1rem;
    user-select: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #FFFFFF;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
    background: var(--gradient-hover);
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background: #E2E8F0;
    border-color: var(--border-hover);
}

.btn-outline {
    background: transparent;
    border-color: var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: rgba(99, 102, 241, 0.08);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
}

.btn-cta {
    border-radius: var(--radius-full);
}

/* Header & Navigation */
.site-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.85rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: clamp(1.15rem, 2vw, 1.45rem);
    font-weight: 800;
    color: var(--text-primary);
    white-space: nowrap;
    flex-shrink: 0;
    line-height: 1.2;
}

.logo-icon {
    font-size: 1.25em;
    line-height: 1;
    display: inline-block;
}

.logo-text {
    white-space: nowrap;
    display: inline-block;
}

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

.main-nav .nav-list {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.4rem 0.2rem;
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Mobile Navigation */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-toggle .bar {
    width: 24px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-drawer {
    display: none;
    position: fixed;
    top: 65px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    z-index: 99;
}

.mobile-drawer.open {
    display: block;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-link {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--bg-main);
}

/* Hero Section & Tool Box */
.hero-section {
    padding: 3.5rem 0 4rem;
    background: radial-gradient(circle at 50% 0%, rgba(139, 92, 246, 0.08) 0%, rgba(248, 250, 252, 0) 70%);
}

.hero-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 2.5rem;
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero-subheading {
    font-size: 1.15rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Tool Box Card */
.tool-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    padding: 2.5rem;
    max-width: 850px;
    margin: 0 auto;
}

.tool-inputs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    position: relative;
}

.input-label {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
}

.form-control {
    width: 100%;
    padding: 0.9rem 1.2rem;
    font-size: 1.05rem;
    font-weight: 600;
    background: var(--bg-input);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    background: #FFFFFF;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.remove-name-btn {
    position: absolute;
    right: 10px;
    top: 36px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.2rem 0.5rem;
}

.remove-name-btn:hover {
    color: var(--pink);
}

.tool-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1rem;
}

.action-buttons-left {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.add-name-btn {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.08);
    border: 1px dashed var(--primary);
    font-weight: 700;
    border-radius: var(--radius-md);
    padding: 0.6rem 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.add-name-btn:hover {
    background: rgba(99, 102, 241, 0.15);
}

/* Category Filtering Tabs */
.results-container {
    margin-top: 3rem;
}

.results-header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.results-title {
    font-size: 1.75rem;
    font-weight: 800;
}

.category-tabs {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    padding: 0.6rem 1.25rem;
    font-weight: 700;
    font-size: 0.95rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
}

.tab-btn:hover {
    background: var(--bg-input);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--primary);
    color: #FFFFFF;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}

/* Results Grid Cards */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.25rem;
}

.result-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

.result-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.card-name {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary);
    word-break: break-word;
}

.card-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--bg-main);
    padding-top: 0.75rem;
}

.card-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    color: var(--text-muted);
    padding: 0.3rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.card-btn:hover {
    color: var(--primary);
    background: var(--bg-input);
}

.card-btn.favorite-btn.active {
    color: var(--pink);
}

/* Recent Combinations Section */
.recent-section {
    background: #FFFFFF;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    margin-top: 3rem;
}

.recent-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

.recent-chip {
    background: var(--bg-input);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.recent-chip:hover {
    background: var(--gradient-subtle);
    color: var(--primary);
}

/* SEO Content & Article Section */
.seo-content-section {
    background: #FFFFFF;
    border-top: 1px solid var(--border-color);
    padding: 4rem 0;
}

.seo-article {
    max-width: 850px;
    margin: 0 auto;
}

.seo-article h2 {
    font-size: 2rem;
    font-weight: 800;
    margin: 2.5rem 0 1rem;
}

.seo-article h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 1.75rem 0 0.75rem;
}

.seo-article p {
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.seo-article ul {
    list-style: disc;
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

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

/* FAQ Accordion */
.faq-container {
    margin-top: 2rem;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    overflow: hidden;
    background: var(--bg-card);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 1.25rem 1.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
}

.faq-question:hover {
    background: var(--bg-main);
}

.faq-icon {
    transition: var(--transition);
    font-size: 1.2rem;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 1.5rem 1.25rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--bg-main);
    padding-top: 1rem;
}

.faq-item.active .faq-answer {
    display: block;
}

/* Advertisement Container Styling */
.ad-slot {
    width: 100%;
    margin: 1.5rem auto;
    text-align: center;
}

.ad-inner {
    background: #F1F5F9;
    border: 1px dashed var(--border-hover);
    border-radius: var(--radius-md);
    padding: 1rem;
    max-width: 970px;
    margin: 0 auto;
}

.ad-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.ad-content-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
}

.ad-badge {
    background: #CBD5E1;
    color: #475569;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
}

.ad-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Footer Section */
.site-footer {
    background: #0F172A;
    color: #94A3B8;
    padding: 4rem 0 2rem;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.4rem;
    font-weight: 800;
    color: #FFFFFF;
    margin-bottom: 1rem;
}

.footer-logo span span {
    color: var(--purple);
}

.footer-desc {
    line-height: 1.7;
    font-size: 0.95rem;
}

.footer-title {
    color: #FFFFFF;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: #94A3B8;
    font-size: 0.95rem;
}

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

.footer-disclaimer-box {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    font-size: 0.85rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    font-size: 0.9rem;
}

/* Toast Notifications */
.toast-notification {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: #0F172A;
    color: #FFFFFF;
    padding: 0.9rem 1.5rem;
    border-radius: var(--radius-full);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 0.95rem;
    transform: translateY(150%);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

.toast-notification.show {
    transform: translateY(0);
}

/* Mobile & Responsive Breakpoints */
@media (max-width: 1200px) {
    .main-nav .nav-list {
        gap: 0.85rem;
    }
    .nav-link {
        font-size: 0.88rem;
    }
}

@media (max-width: 1080px) {
    .main-nav {
        display: none;
    }
    .mobile-toggle {
        display: flex;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .header-actions .btn-cta {
        display: none;
    }

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

    .tool-card {
        padding: 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .results-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }

    .toast-notification {
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
        justify-content: center;
    }
}