/* ==========================================================================
   THE LUXURY ARCHITECTURE CORE & VARIABLES
   ========================================================================== */
:root {
    /* Palette: Premium Noir, Pure Alabaster, Cashmere, Muted Sage-Teal */
    --luxury-bg: #09090b;
    --luxury-card-bg: #141417;
    --luxury-white: #fafafa;
    --luxury-black: #000000;
    --luxury-muted: #8e8e93;
    --luxury-border: rgba(255, 255, 255, 0.06);
    --luxury-accent: #0d9488;
    --luxury-accent-light: #5eead4;
    
    /* Typography: High-End Swiss Geometric Display & Fine Text */
    --luxury-font: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --transition-luxury: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    --header-height: 100px;
}

/* ==========================================================================
   HIGH-END RESET
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html, body {
    background-color: var(--luxury-bg);
    color: var(--luxury-white);
    font-family: var(--luxury-font);
    overflow-x: hidden;
    scroll-behavior: auto;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ==========================================================================
   LUXURY CONTAINER & GRID MATRIX
   ========================================================================== */
.luxury-container {
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 5rem;
}

.section-padding {
    padding: 12rem 0;
}

/* ==========================================================================
   FLOATING CURTAIN HEADER (Ultra-Premium Navigation)
   ========================================================================== */
.luxury-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    background-color: transparent;
    transition: var(--transition-luxury);
    border-bottom: 1px solid transparent;
}

.luxury-header.scrolled {
    background-color: rgba(9, 9, 11, 0.85);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--luxury-border);
    height: 80px;
}

.luxury-header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 5rem;
    max-width: 100%;
}

.brand-monogram {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 5px;
    text-transform: uppercase;
    color: var(--luxury-white);
}

.luxury-nav-list {
    display: flex;
    gap: 3.5rem;
}

.luxury-nav-link {
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--luxury-muted);
    padding: 0.5rem 0;
    position: relative;
    transition: var(--transition-luxury);
}

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

.luxury-nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--luxury-accent-light);
    transition: var(--transition-luxury);
}

.luxury-nav-link:hover::after, .luxury-nav-link.active::after {
    width: 100%;
}

.luxury-meta-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--luxury-muted);
}

.meta-link:hover { color: var(--luxury-white); }
.meta-separator { opacity: 0.3; }

.luxury-menu-toggle { display: none; }

body.internal-page .luxury-header {
    background-color: var(--luxury-bg);
    border-bottom: 1px solid var(--luxury-border);
}

/* ==========================================================================
   IMMERSIVE CINEMATIC HERO (Index Overture)
   ========================================================================== */
.luxury-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    background-color: var(--luxury-black);
}

.luxury-hero-bg-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 85% 30%, rgba(13, 148, 136, 0.12) 0%, transparent 60%),
                linear-gradient(180deg, rgba(9,9,11,0.2) 0%, rgba(9,9,11,1) 100%);
    z-index: 1;
}

.hero-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 8rem;
    align-items: start;
}

.luxury-pre-title {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--luxury-accent-light);
    margin-bottom: 2.5rem;
}

.luxury-title {
    font-size: 5.5rem;
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -3px;
    color: var(--luxury-white);
}

.luxury-title span {
    display: block;
}

.luxury-lead {
    font-size: 1.6rem;
    line-height: 1.45;
    font-weight: 300;
    color: #e4e4e7;
    margin-bottom: 3.5rem;
    letter-spacing: -0.5px;
}

.story-chapters {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--luxury-muted);
    border-left: 1px solid var(--luxury-border);
    padding-left: 2.5rem;
    margin-bottom: 4rem;
}

.luxury-footnote {
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--luxury-white);
    margin-bottom: 2rem;
    line-height: 1.5;
}

/* ==========================================================================
   HIGH-PERFORMANCE LUXURY BUTTON
   ========================================================================== */
.luxury-btn {
    position: relative;
    display: inline-block;
    padding: 1.5rem 4rem;
    background-color: var(--luxury-white);
    color: var(--luxury-black);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}

.luxury-btn:hover {
    transform: scale(1.02);
    background-color: var(--luxury-accent-light);
}

.btn-text {
    position: relative;
    z-index: 2;
}

/* ==========================================================================
   ASYMMETRIC EDITORIAL LAYOUTS (Manifesto & Core Sections)
   ========================================================================== */
.luxury-manifesto-teaser {
    background-color: var(--luxury-bg);
    padding: 12rem 0;
    border-top: 1px solid var(--luxury-border);
}

.manifesto-asymmetric-split {
    display: grid;
    grid-template-columns: 0.4fr 1.6fr;
    gap: 4rem;
}

.luxury-index {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--luxury-muted);
}

.manifesto-right h2 {
    font-size: 2.8rem;
    font-weight: 400;
    line-height: 1.3;
    letter-spacing: -1.5px;
    color: #f4f4f5;
    margin-bottom: 5rem;
}

.editorial-links-stack {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--luxury-border);
}

.editorial-stack-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2.5rem 0;
    border-bottom: 1px solid var(--luxury-border);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--luxury-white);
    transition: var(--transition-luxury);
}

.editorial-stack-link:hover {
    padding-left: 1.5rem;
    color: var(--luxury-accent-light);
}

.stack-arrow {
    font-weight: 300;
    transition: var(--transition-luxury);
}

.editorial-stack-link:hover .stack-arrow {
    transform: translateX(10px);
}

/* ==========================================================================
   MULTI-PAGE PREMIUM MODULES (Internal Page Structural Layouts)
   ========================================================================== */
.luxury-page-header {
    padding: 14rem 0 6rem 0;
    border-bottom: 1px solid var(--luxury-border);
    background-color: var(--luxury-black);
}

.luxury-page-header h1 {
    font-size: 4.5rem;
    font-weight: 800;
    letter-spacing: -3px;
    line-height: 1;
}

/* Clinical Core Streams & Comparison System */
.luxury-stream-row {
    display: grid;
    grid-template-columns: 0.4fr 1.6fr;
    gap: 6rem;
    padding: 6rem 0;
    border-bottom: 1px solid var(--luxury-border);
}

.luxury-stream-meta {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--luxury-accent-light);
    position: sticky;
    top: 140px;
}

.luxury-stream-body-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.luxury-editorial-card {
    background-color: var(--luxury-card-bg);
    border: 1px solid var(--luxury-border);
    padding: 3rem;
}

.card-version-indicator {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
    display: block;
}

.luxury-editorial-card.original .card-version-indicator { color: var(--luxury-muted); }
.luxury-editorial-card.revision .card-version-indicator { color: var(--luxury-accent-light); }

.luxury-editorial-card p {
    font-size: 1.05rem;
    line-height: 1.65;
    color: #d4d4d8;
}

.luxury-editorial-card.original p {
    opacity: 0.5;
    font-style: italic;
}

/* Luxury Pricing Architecture */
.luxury-tier-matrix {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 4rem 0;
}

.luxury-tier-item {
    background-color: var(--luxury-card-bg);
    border: 1px solid var(--luxury-border);
    padding: 4rem 3rem;
    transition: var(--transition-luxury);
}

.luxury-tier-item:hover {
    border-color: var(--luxury-accent-light);
    transform: translateY(-5px);
}

.tier-item-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--luxury-muted);
    margin-bottom: 3rem;
    display: block;
}

.tier-item-price {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 1rem;
}

.tier-item-specs {
    font-size: 1rem;
    color: #a1a1aa;
    line-height: 1.5;
}

/* Luxury Accordion (FAQs) */
.luxury-faq-accordion {
    max-width: 1100px;
    margin: 5rem 0;
}

.luxury-accordion-node {
    border-bottom: 1px solid var(--luxury-border);
}

.luxury-accordion-trigger {
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    padding: 2.5rem 0;
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--luxury-white);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-luxury);
}

.luxury-accordion-trigger:hover {
    color: var(--luxury-accent-light);
}

.luxury-accordion-indicator {
    width: 20px;
    height: 20px;
    position: relative;
}

.luxury-accordion-indicator::before, .luxury-accordion-indicator::after {
    content: '';
    position: absolute;
    background-color: currentColor;
    transition: var(--transition-luxury);
}

.luxury-accordion-indicator::before { top: 9px; left: 0; width: 100%; height: 1px; }
.luxury-accordion-indicator::after { left: 9px; top: 0; width: 1px; height: 100%; }

.luxury-accordion-node.active .luxury-accordion-indicator::after {
    transform: rotate(90deg);
    opacity: 0;
}

.luxury-accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.luxury-accordion-content-inner {
    padding-bottom: 3rem;
    color: var(--luxury-muted);
    font-size: 1.1rem;
    line-height: 1.7;
    max-width: 900px;
}

.luxury-accordion-content-inner p { margin-bottom: 1rem; }

/* Brutalist Statement Module */
.luxury-brutalist-statement-box {
    background-color: var(--luxury-black);
    padding: 8rem 5rem;
    border: 1px solid var(--luxury-border);
    margin: 6rem 0;
}

.luxury-statement-text {
    font-size: 2.2rem;
    line-height: 1.4;
    font-weight: 300;
    letter-spacing: -1px;
    color: #e4e4e7;
}

/* ==========================================================================
   PREMIUM MONOCHROMATIC FOOTER
   ========================================================================== */
.luxury-footer {
    background-color: var(--luxury-black);
    border-top: 1px solid var(--luxury-border);
    padding: 6rem 0 4rem 0;
    font-size: 0.9rem;
    margin-top: auto;
}

.footer-top-row {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 6rem;
}

.footer-brand-signature {
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 6px;
}

.footer-legal-intel {
    text-align: right;
    color: var(--luxury-muted);
    line-height: 1.8;
}

.footer-bottom-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    padding-top: 2.5rem;
    color: rgba(255,255,255,0.3);
}

.regulatory-notice {
    max-width: 500px;
    text-align: right;
    font-size: 0.8rem;
}

/* ==========================================================================
   ENGINEERED ENGINE ANIMATIONS (Intersection Classes)
   ========================================================================== */
.animate-text-reveal span {
    display: block;
    opacity: 0;
    transform: translateY(40px);
    animation: luxuryReveal 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-text-reveal span:nth-child(2) { animation-delay: 0.15s; }
.animate-text-reveal span:nth-child(3) { animation-delay: 0.3s; }

.animate-fade-in {
    opacity: 0;
    animation: luxuryFade 1.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-fade-in-delayed {
    opacity: 0;
    animation: luxuryFade 1.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: 0.4s;
}

@keyframes luxuryReveal {
    to { opacity: 1; transform: translateY(0); }
}

@keyframes luxuryFade {
    to { opacity: 1; }
}

/* ==========================================================================
   FLUID SCALING RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 1400px) {
    .luxury-container, .luxury-header-container { padding: 0 3rem; }
    .luxury-title { font-size: 4.5rem; }
}

@media (max-width: 1024px) {
    .hero-grid, .luxury-stream-row, .luxury-stream-body-split, .manifesto-asymmetric-split {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .luxury-tier-matrix { grid-template-columns: 1fr; }
    .footer-top-row, .footer-bottom-row { flex-direction: column; gap: 2rem; text-align: left; }
    .footer-legal-intel, .regulatory-notice { text-align: left; }
    .luxury-title { font-size: 3.5rem; }
}

@media (max-width: 768px) {
    .luxury-nav, .luxury-meta-actions { display: none; }
    .luxury-menu-toggle {
        display: block;
        background: none;
        border: none;
        cursor: pointer;
        color: var(--luxury-white);
    }
    .toggle-line-wrapper {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
    .toggle-line-wrapper span {
        display: block;
        width: 30px;
        height: 1px;
        background-color: currentColor;
    }
    .luxury-page-header h1 { font-size: 3rem; }
    .luxury-brutalist-statement-box { padding: 3rem 1.5rem; }
    .luxury-statement-text { font-size: 1.5rem; }
}