/* Reset and Base Variables */
:root {
    --primary-color: #a855f7; /* Purple */
    --primary-hover: #c084fc;
    --text-main: #f8fafc;
    --text-light: #cbd5e1;
    --bg-dark: #0f172a;
    --gradient-brand: linear-gradient(135deg, #3b82f6, #a855f7, #ec4899);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Nebula Background Effect */
body {
    font-family: var(--font-family);
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--bg-dark);
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background: radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15), transparent 50%),
                radial-gradient(circle at 85% 30%, rgba(236, 72, 153, 0.15), transparent 50%),
                radial-gradient(circle at 50% 80%, rgba(168, 85, 247, 0.15), transparent 50%);
    filter: blur(60px);
    z-index: -2;
    animation: nebula-flow 20s ease-in-out infinite alternate;
}

@keyframes nebula-flow {
    0% { transform: scale(1) translate(0, 0); }
    100% { transform: scale(1.1) translate(-20px, 20px); }
}

a {
    text-decoration: none;
    color: #c084fc;
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 4rem;
    color: transparent;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    background-clip: text;
}

section {
    padding-top: 6rem;
    padding-bottom: 6rem;
}

/* Buttons */
.btn-primary, .btn-outline {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: bold;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-brand);
    color: #fff !important;
    box-shadow: 0 4px 15px rgba(168, 85, 247, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(168, 85, 247, 0.6);
}

.btn-outline {
    background: transparent;
    color: #f8fafc !important;
    border: 1px solid var(--primary-color);
    box-shadow: inset 0 0 10px rgba(168,85,247,0.2);
}

.btn-outline:hover {
    background: var(--gradient-brand);
    border-color: transparent;
}

.btn-large {
    padding: 16px 36px;
    font-size: 1.2rem;
}

/* Header */
.header {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    color: transparent;
}

/* Navigation Links */
.nav-links {
    display: flex;
    gap: 20px;
}
.nav-links a {
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.3s;
}
.nav-links a:hover {
    color: #fff;
}

/* Hero Section */
.hero {
    padding: 8rem 0;
}
.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}
.hero-text {
    flex: 1;
}
.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    color: transparent;
}
.hero p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
}
.hero-svg-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* Grids */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

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

/* Glassmorphism Cards */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: var(--glass-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
    border-color: rgba(255,255,255,0.3);
}

.card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #fff;
}

.card p {
    color: var(--text-light);
}

/* Pricing Section - 3D Carousel */
.pricing {
    perspective: 1200px;
    padding: 6rem 0 8rem;
}
.carousel-3d {
    position: relative;
    width: 320px;
    height: 520px;
    margin: 0 auto;
    transform-style: preserve-3d;
    animation: rotate-carousel 20s infinite linear;
}
@keyframes rotate-carousel {
    from { transform: rotateY(0deg); }
    to { transform: rotateY(360deg); }
}
.carousel-3d:hover {
    animation-play-state: paused;
}
.carousel-3d .pricing-card {
    position: absolute;
    top: 0; left: 0;
    width: 320px;
    height: 520px;
    display: flex;
    flex-direction: column;
    text-align: center;
}
/* Positions */
.carousel-3d .pricing-card:nth-child(1) { transform: rotateY(0deg) translateZ(350px); }
.carousel-3d .pricing-card:nth-child(2) { transform: rotateY(120deg) translateZ(350px); }
.carousel-3d .pricing-card:nth-child(3) { transform: rotateY(240deg) translateZ(350px); }

.pricing-card .price {
    font-size: 2.8rem;
    font-weight: bold;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    color: transparent;
    margin: 1.5rem 0;
}

.pricing-card .price span {
    font-size: 1rem;
    color: var(--text-light);
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
    flex-grow: 1;
}

.pricing-card ul li {
    padding: 12px 0;
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-light);
}

.pricing-card ul li:before {
    content: "✦ ";
    color: #ec4899;
}

.badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-brand);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(236,72,153,0.4);
}

/* Reviews Section */
.review-card .stars {
    margin-bottom: 1rem;
    color: #f59e0b;
}
.review-card p {
    font-style: italic;
    margin-bottom: 1rem;
}
.review-card .author {
    font-weight: bold;
    color: #fff;
}

/* FAQ Section */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
}
.faq-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    color: #fff;
}
.faq-item p {
    color: var(--text-light);
}

/* Footer */
.footer {
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--glass-border);
    padding: 4rem 0 2rem;
    text-align: center;
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    margin-bottom: 2rem;
}

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

.footer-nav a:hover {
    color: #fff;
}

.copyright {
    color: #64748b;
    font-size: 0.85rem;
}

/* Vertical Marquee */
.vertical-marquee-container {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    height: 400px;
    width: 40px;
    overflow: hidden;
    z-index: 50;
    pointer-events: none;
    opacity: 0.6;
}

.vertical-marquee {
    display: inline-block;
    white-space: nowrap;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    animation: scroll-vertical 15s linear infinite;
    color: var(--primary-hover);
    font-weight: bold;
    letter-spacing: 2px;
    font-size: 0.9rem;
}

@keyframes scroll-vertical {
    0% { transform: translateY(100%); }
    100% { transform: translateY(-100%); }
}

/* SEO Articles & Knowledge Base Styles (Preserved & Adapted for Dark Mode) */
.page-content { padding: 4rem 20px; max-width: 1200px; margin: 0 auto; }
.page-content h1 { margin-bottom: 2rem; border-bottom: 2px solid var(--primary-color); padding-bottom: 0.5rem; display: inline-block; color: #fff; }
.article-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media(min-width: 768px){ .article-grid { grid-template-columns: repeat(2, 1fr); } }
@media(min-width: 1024px){ .article-grid { grid-template-columns: repeat(3, 1fr); } }
.article-card { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: 8px; padding: 1.5rem; transition: transform 0.3s; display: flex; flex-direction: column; }
.article-card:hover { transform: translateY(-3px); box-shadow: var(--glass-shadow); border-color: var(--primary-hover); }
.article-card h3 { font-size: 1.2rem; margin-bottom: 0.8rem; }
.article-card a { color: var(--text-main); text-decoration: none; display: block; }
.article-card a:hover { color: var(--primary-hover); }
.article-card p { color: var(--text-light); font-size: 0.95rem; margin-bottom: 1rem; flex-grow: 1; }
.article-card .read-more { color: var(--primary-color); font-weight: bold; font-size: 0.9rem; margin-top: auto; }

.article-content { padding: 4rem 20px; max-width: 850px; margin: 0 auto; line-height: 1.8; }
.article-content h1 { font-size: 2.2rem; margin-bottom: 1rem; color: #fff; line-height: 1.4; }
.article-meta { color: #cbd5e1; margin-bottom: 2rem; border-bottom: 1px solid var(--glass-border); padding-bottom: 1rem; font-size: 0.95rem; }
.article-content h2 { margin: 2.5rem 0 1rem; font-size: 1.6rem; color: var(--primary-color); border-left: 4px solid var(--primary-color); padding-left: 12px; }
.article-content h3 { margin: 1.5rem 0 1rem; font-size: 1.3rem; color: var(--text-main); }
.article-content p { margin-bottom: 1.5rem; color: #f8fafc; font-size: 1.05rem; }
.article-content ul, .article-content ol { margin-left: 2rem; margin-bottom: 1.5rem; color: #f8fafc; font-size: 1.05rem; }
.article-content li { margin-bottom: 0.8rem; }
.article-content a { color: var(--primary-color); text-decoration: underline; font-weight: 500; }
.article-content a:hover { color: var(--primary-hover); }

/* Media Queries */
@media (max-width: 768px) {
    .hero .container { flex-direction: column; text-align: center; }
    .hero h1 { font-size: 2.5rem; }
    .hero-svg-wrapper { display: none; }
    
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    
    .carousel-3d { animation: none; transform: none; width: 100%; height: auto; }
    .carousel-3d .pricing-card { position: relative; transform: none !important; width: 100%; height: auto; margin-bottom: 2rem; }
    
    .nav { flex-direction: column; height: auto; padding: 15px 0; gap: 15px; }
    .nav-links { flex-wrap: wrap; justify-content: center; gap: 10px; }
    .btn-primary, .btn-outline { display: block; width: 100%; padding: 16px; }
    .footer-nav { flex-wrap: wrap; gap: 1rem; }
    .vertical-marquee-container { display: none; }
}


/* Phase 2 Accessibility & Mobile Optimization */
.skip-link {
    position: absolute;
    top: -50px;
    left: 10px;
    background: var(--primary-color);
    color: #fff;
    padding: 8px 16px;
    z-index: 99999;
    border-radius: 4px;
    font-weight: bold;
    text-decoration: none;
    transition: top 0.3s;
}
.skip-link:focus {
    top: 10px;
}
:focus-visible {
    outline: 2px solid var(--primary-hover);
    outline-offset: 3px;
    border-radius: 2px;
}
.btn-primary, .btn-outline, .btn-large {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
section[id], main[id] {
    scroll-margin-top: 80px;
}

/* Details/Summary FAQ styling replacement to visually match old div structure */
details.faq-item {
    cursor: pointer;
}
details.faq-item summary {
    list-style: none;
    outline: none;
    display: block;
}
details.faq-item summary::-webkit-details-marker {
    display: none;
}
details.faq-item summary::before {
    content: '▶ ';
    display: inline-block;
    color: var(--primary-color);
    font-size: 0.8em;
    margin-right: 8px;
    transition: transform 0.2s ease;
}
details[open].faq-item summary::before {
    transform: rotate(90deg);
}