:root {
    --bg-dark: #0B0E13;
    --ink-light: #E9E4D6;
    --accent-mint: #8FE3CF;
    --hairline: rgba(233,228,214,0.16);
    --hairline-hover: rgba(233,228,214,0.3);
    
    --font-display: 'Fraunces', 'Noto Serif SC', serif;
    --font-body: 'Noto Sans SC', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--ink-light);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 300;
}

.section-heading {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent-mint);
    margin-bottom: 24px;
}

.section-title {
    font-size: 2.2rem;
    margin-bottom: 60px;
}

/* Container & Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 120px 0;
    border-bottom: 1px solid var(--hairline);
}

.grid-2, .grid-3 {
    display: grid;
    gap: 48px;
}
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* Navigation */
.top-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 14, 19, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--hairline);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-lockup {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.wordmark {
    font-family: var(--font-display);
    font-size: 1.2rem;
    line-height: 1.2;
}

.caption {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 2px;
    opacity: 0.6;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--ink-light);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    transition: opacity 0.2s;
}

.nav-links a:hover {
    opacity: 0.7;
    color: var(--accent-mint);
}

.nav-links .nav-btn {
    border: 1px solid var(--hairline);
    padding: 8px 16px;
    border-radius: 99px;
}

.nav-links .nav-btn:hover {
    border-color: var(--accent-mint);
}

/* Hero Section */
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--hairline);
    padding: 80px 0;
}

.status-line {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 2px;
    margin-bottom: 40px;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-mint);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(143, 227, 207, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(143, 227, 207, 0); }
    100% { box-shadow: 0 0 0 0 rgba(143, 227, 207, 0); }
}

.display-title {
    font-size: clamp(3rem, 6vw, 5rem);
    line-height: 1.1;
    margin-bottom: 32px;
    letter-spacing: -0.02em;
}

.hero-desc {
    font-size: 1.25rem;
    max-width: 600px;
    opacity: 0.8;
    margin-bottom: 48px;
    font-weight: 300;
}

/* Buttons */
.pill-btn {
    display: inline-block;
    padding: 16px 36px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-decoration: none;
    border-radius: 999px;
    background: transparent;
    color: var(--ink-light);
    border: 1px solid var(--ink-light);
    transition: all 0.3s ease;
    cursor: pointer;
}

.pill-btn:hover {
    background: var(--ink-light);
    color: var(--bg-dark);
}

.pill-btn.active {
    background: var(--ink-light);
    color: var(--bg-dark);
    border-color: var(--ink-light);
}

.pill-btn.active:hover {
    background: transparent;
    color: var(--ink-light);
}

.pill-btn.small {
    padding: 12px 24px;
    font-size: 11px;
}

/* Features */
.feature-item {
    border-left: 1px solid var(--hairline);
    padding-left: 24px;
}

.feature-icon {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent-mint);
    margin-bottom: 24px;
}

.feature-item h4 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.feature-item p {
    opacity: 0.7;
    font-size: 0.95rem;
}

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border: 1px solid var(--hairline);
}

.pricing-card {
    padding: 48px 32px;
    border-right: 1px solid var(--hairline);
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card:last-child {
    border-right: none;
}

.pricing-card.active {
    background: rgba(233,228,214,0.03);
}

.active-badge {
    position: absolute;
    top: 24px;
    right: 32px;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 1.5px;
    color: var(--accent-mint);
}

.tier {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 1.5px;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.price {
    font-family: var(--font-display);
    font-size: 3rem;
    margin-bottom: 32px;
    line-height: 1;
}

.period {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 1px;
    opacity: 0.5;
}

.specs {
    list-style: none;
    margin-bottom: 48px;
    flex-grow: 1;
}

.specs li {
    font-size: 0.95rem;
    padding: 12px 0;
    border-bottom: 1px solid var(--hairline);
    opacity: 0.8;
}

.specs li:last-child {
    border-bottom: none;
}

/* External Resource Box */
.external-resource {
    border: 1px solid var(--hairline);
    padding: 64px;
    text-align: center;
    background: rgba(11, 14, 19, 0.4);
}

.external-resource h3 {
    font-size: 1.8rem;
    margin-bottom: 24px;
}

.external-resource p {
    max-width: 600px;
    margin: 0 auto 32px;
    opacity: 0.7;
}

/* Footer */
.footer {
    padding: 60px 0;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 1.5px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--ink-light);
    text-decoration: none;
    opacity: 0.6;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--accent-mint);
}

.footer-meta {
    opacity: 0.4;
    display: flex;
    gap: 24px;
}

/* Responsive */
@media (max-width: 900px) {
    .grid-3 { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
    
    .pricing-grid { 
        grid-template-columns: 1fr;
        border: none;
    }
    
    .pricing-card {
        border-right: none;
        border: 1px solid var(--hairline);
        margin-bottom: 24px;
    }
    
    .nav-links { display: none; } /* Simplified for mobile */
    
    .footer-container {
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }
    .footer-links { flex-direction: column; gap: 16px; }
}

/* Floating Button */
.floating-btn {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-dark);
    border: 1px solid var(--hairline);
    color: var(--ink-light);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: all 0.3s;
    opacity: 0.7;
    text-decoration: none;
}
.floating-btn:hover {
    opacity: 1;
    border-color: var(--accent-mint);
    color: var(--accent-mint);
    background: rgba(143, 227, 207, 0.05);
}

/* Next Article Nav */
.next-article-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--hairline);
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
}
.next-article-nav a {
    color: var(--ink-light);
    text-decoration: none;
    transition: color 0.2s;
    flex: 1;
}
.next-article-nav a.next-link {
    text-align: right;
}
.next-article-nav a:hover {
    color: var(--accent-mint);
}

/* FAQ */
.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    border: 1px solid var(--hairline);
    padding: 32px;
    background: rgba(11, 14, 19, 0.4);
}
.faq-item h4 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: var(--ink-light);
}
.faq-item p {
    font-size: 0.95rem;
    opacity: 0.8;
}

/* Hero Layout */
.hero-inner {
    display: flex;
    align-items: center;
    gap: 60px;
}
.hero-content {
    flex: 1;
}
.hero-visual {
    flex: 1;
    border: 1px solid var(--hairline);
    padding: 8px;
    background: rgba(233,228,214,0.02);
}
.hero-visual img {
    width: 100%;
    height: auto;
    display: block;
    filter: brightness(0.9) contrast(1.1);
}
@media (max-width: 900px) {
    .hero-inner { flex-direction: column; }
}

/* Floating Button */
.floating-btn {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-dark);
    border: 1px solid var(--hairline);
    color: var(--ink-light);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: all 0.3s;
    opacity: 0.7;
    text-decoration: none;
}
.floating-btn:hover {
    opacity: 1;
    border-color: var(--accent-mint);
    color: var(--accent-mint);
    background: rgba(143, 227, 207, 0.05);
}

/* Next Article Nav */
.next-article-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--hairline);
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
}
.next-article-nav a {
    color: var(--ink-light);
    text-decoration: none;
    transition: color 0.2s;
    flex: 1;
}
.next-article-nav a.next-link {
    text-align: right;
}
.next-article-nav a:hover {
    color: var(--accent-mint);
}

/* FAQ */
.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    border: 1px solid var(--hairline);
    padding: 32px;
    background: rgba(11, 14, 19, 0.4);
}
.faq-item h4 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: var(--ink-light);
}
.faq-item p {
    font-size: 0.95rem;
    opacity: 0.8;
}

/* Hero Layout */
.hero-inner {
    display: flex;
    align-items: center;
    gap: 60px;
}
.hero-content {
    flex: 1;
}
.hero-visual {
    flex: 1;
    border: 1px solid var(--hairline);
    padding: 8px;
    background: rgba(233,228,214,0.02);
}
.hero-visual img {
    width: 100%;
    height: auto;
    display: block;
    filter: brightness(0.9) contrast(1.1);
}
@media (max-width: 900px) {
    .hero-inner { flex-direction: column; }
}