/** * Copyright (c) 2026 DNA Genics, S.L. All rights reserved.
 * 
 * Analysis Methods Page - Methodological Reference
 * A calm, academic, transparent design for understanding how ancestry results are built.
 * Follows scholarly design principles with clear typography and generous spacing.
 */

/* ========================================
   CSS VARIABLES - ACADEMIC DESIGN SYSTEM
   ======================================== */
:root {
    /* Primary Brand Colors - Muted, Scholarly */
    --methods-deep: #0f1419;
    --methods-deep-soft: #1a2332;
    --methods-navy: #162029;
    --methods-slate: #1e2d38;
    
    /* Accent Colors - Restrained Teal & Gold */
    --methods-primary: #2c7a7b;
    --methods-primary-dark: #1a5456;
    --methods-primary-light: #81e6d9;
    --methods-teal: #319795;
    --methods-teal-light: #4fd1c5;
    --methods-gold: #b7945e;
    --methods-gold-light: #d4a863;
    
    /* Neutral Palette - Warm Paper Tones */
    --methods-white: #ffffff;
    --methods-off-white: #faf9f7;
    --methods-cream: #f5f3ef;
    --methods-gray-100: #f1f0ed;
    --methods-gray-200: #e4e2dc;
    --methods-gray-300: #c5c2ba;
    --methods-gray-400: #9a968c;
    --methods-gray-500: #706c64;
    --methods-gray-600: #4a473f;
    --methods-gray-700: #2d2a24;
    --methods-gray-800: #1a1815;
    --methods-gray-900: #0d0c0a;
    
    /* Text Colors */
    --methods-text-dark: #1a1815;
    --methods-text-body: #4a473f;
    --methods-text-muted: #706c64;
    --methods-text-light: #f0f0f2;
    --methods-text-light-muted: rgba(240, 240, 242, 0.7);
    
    /* Typography */
    --methods-font-serif: 'Cormorant Garamond', 'Georgia', 'Times New Roman', serif;
    --methods-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --methods-space-xs: 0.5rem;
    --methods-space-sm: 1rem;
    --methods-space-md: 1.5rem;
    --methods-space-lg: 2.5rem;
    --methods-space-xl: 4rem;
    --methods-space-2xl: 6rem;
    --methods-space-3xl: 8rem;
    
    /* Border Radius */
    --methods-radius-sm: 4px;
    --methods-radius-md: 8px;
    --methods-radius-lg: 12px;
    --methods-radius-xl: 16px;
    
    /* Shadows - Soft and Subtle */
    --methods-shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.04);
    --methods-shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
    --methods-shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.08);
    --methods-shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.1);
    --methods-shadow-primary: 0 8px 32px rgba(44, 122, 123, 0.15);
    
    /* Transitions */
    --methods-ease: cubic-bezier(0.4, 0, 0.2, 1);
    --methods-ease-gentle: cubic-bezier(0.25, 0.1, 0.25, 1);
    --methods-transition-fast: 0.15s var(--methods-ease);
    --methods-transition: 0.3s var(--methods-ease);
    --methods-transition-slow: 0.6s var(--methods-ease-gentle);
}

/* ========================================
   BASE STYLES
   ======================================== */
.methods-main {
    font-family: var(--methods-font-sans);
    color: var(--methods-text-body);
    background: var(--methods-off-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    line-height: 1.75;
}

.methods-main *,
.methods-main *::before,
.methods-main *::after {
    box-sizing: border-box;
}

/* Skip Link - Accessibility */
.methods-skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    background: var(--methods-primary);
    color: var(--methods-white);
    padding: 12px 24px;
    text-decoration: none;
    font-weight: 600;
    border-radius: var(--methods-radius-sm);
    z-index: 10000;
    transition: top var(--methods-transition-fast);
}

.methods-skip-link:focus {
    top: 16px;
    outline: 3px solid var(--methods-primary-light);
    outline-offset: 2px;
}

/* ========================================
   SCROLL PROGRESS BAR
   ======================================== */
.methods-scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--methods-primary) 0%, var(--methods-teal) 100%);
    z-index: 9999;
    transition: width 0.1s ease-out;
}

/* ========================================
   PAGE NAVIGATION DOTS (Desktop)
   ======================================== */
.methods-page-nav {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.methods-page-nav a {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(44, 122, 123, 0.2);
    border: 2px solid var(--methods-primary);
    transition: var(--methods-transition);
    position: relative;
}

.methods-page-nav a:hover,
.methods-page-nav a.active {
    background: var(--methods-primary);
    transform: scale(1.2);
}

.methods-page-nav a::after {
    content: attr(data-tooltip);
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--methods-slate);
    color: var(--methods-white);
    padding: 6px 12px;
    border-radius: var(--methods-radius-sm);
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--methods-transition);
    font-family: var(--methods-font-sans);
}

.methods-page-nav a:hover::after {
    opacity: 1;
    right: 28px;
}

@media (max-width: 991px) {
    .methods-page-nav {
        display: none;
    }
}

/* ========================================
   MOBILE BOTTOM NAVIGATION
   ======================================== */
.methods-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--methods-gray-200);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 8px 0;
    padding-bottom: calc(8px + env(safe-area-inset-bottom));
    z-index: 1000;
}

.methods-bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 12px;
    color: var(--methods-text-muted);
    text-decoration: none;
    font-size: 10px;
    font-weight: 500;
    transition: var(--methods-transition-fast);
    border-radius: var(--methods-radius-sm);
}

.methods-bottom-nav-item .dna-icon {
    font-size: 18px;
}

.methods-bottom-nav-item.active,
.methods-bottom-nav-item:hover {
    color: var(--methods-primary);
}

.methods-bottom-nav-item.active {
    background: rgba(44, 122, 123, 0.08);
}

@media (min-width: 768px) {
    .methods-bottom-nav {
        display: none !important;
    }
}

/* Add padding for mobile bottom nav */
@media (max-width: 767px) {
    .methods-main {
        padding-bottom: 70px;
    }
}

/* ========================================
   BACK TO TOP BUTTON
   ======================================== */
.methods-back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--methods-white);
    color: var(--methods-primary);
    border: 1px solid var(--methods-gray-200);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--methods-shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--methods-transition);
    z-index: 99;
}

.methods-back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.methods-back-to-top:hover {
    background: var(--methods-primary);
    color: var(--methods-white);
    border-color: var(--methods-primary);
    transform: translateY(-4px);
}

@media (max-width: 767px) {
    .methods-back-to-top {
        bottom: 90px;
        right: 16px;
        width: 40px;
        height: 40px;
    }
}

/* ========================================
   HERO SECTION
   ======================================== */
.methods-hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--methods-deep) 0%, var(--methods-navy) 50%, var(--methods-slate) 100%);
    padding: var(--methods-space-3xl) var(--methods-space-lg);
    overflow: hidden;
}

.methods-hero-overlay {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(44, 122, 123, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(183, 148, 94, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.methods-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.methods-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 8px 20px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--methods-text-light-muted);
    margin-bottom: var(--methods-space-lg);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.methods-hero-badge .dna-icon {
    color: var(--methods-primary-light);
}

.methods-hero-headline {
    font-family: var(--methods-font-serif);
    font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
    font-weight: 400;
    line-height: 1.15;
    color: var(--methods-text-light);
    margin-bottom: var(--methods-space-md);
    letter-spacing: -0.02em;
}

.methods-hero-subheadline {
    font-family: var(--methods-font-sans);
    font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
    font-weight: 400;
    line-height: 1.7;
    color: var(--methods-text-light-muted);
    max-width: 600px;
    margin: 0 auto var(--methods-space-lg);
}

.methods-hero-microcopy {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--methods-text-light-muted);
    opacity: 0.8;
    margin-bottom: var(--methods-space-lg);
}

.methods-hero-microcopy .dna-icon {
    color: var(--methods-gold);
}

.methods-hero-cta {
    margin-top: var(--methods-space-md);
}

/* Scroll Indicator */
.methods-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--methods-text-light-muted);
    text-decoration: none;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.7;
    transition: var(--methods-transition);
}

.methods-scroll-indicator:hover {
    opacity: 1;
    color: var(--methods-text-light);
}

.methods-scroll-indicator .dna-icon {
    animation: bounceDown 2s infinite;
}

@keyframes bounceDown {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(8px);
    }
    60% {
        transform: translateY(4px);
    }
}

/* ========================================
   BUTTONS
   ======================================== */
.methods-btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--methods-primary);
    color: var(--methods-white);
    font-family: var(--methods-font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--methods-radius-md);
    cursor: pointer;
    transition: var(--methods-transition);
    box-shadow: var(--methods-shadow-primary);
}

.methods-btn-primary:hover {
    background: var(--methods-primary-dark);
    color: var(--methods-white);
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(44, 122, 123, 0.25);
}

.methods-btn-primary.methods-btn-large {
    padding: 16px 40px;
    font-size: 1rem;
}

.methods-btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    background: transparent;
    color: var(--methods-text-light);
    font-family: var(--methods-font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--methods-radius-md);
    cursor: pointer;
    transition: var(--methods-transition);
}

.methods-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--methods-text-light);
    border-color: rgba(255, 255, 255, 0.3);
}

.methods-btn-text {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--methods-primary);
    font-weight: 500;
    text-decoration: none;
    transition: var(--methods-transition);
}

.methods-btn-text:hover {
    color: var(--methods-primary-dark);
    text-decoration: underline;
}

/* ========================================
   SECTIONS - BASE STYLES
   ======================================== */
.methods-section {
    padding: var(--methods-space-3xl) 0;
    position: relative;
}

.methods-section-light {
    background: var(--methods-off-white);
}

.methods-section-warm {
    background: var(--methods-cream);
}

.methods-section-dark {
    background: linear-gradient(135deg, var(--methods-deep) 0%, var(--methods-slate) 100%);
}

.methods-section-accent {
    background: linear-gradient(135deg, #1a3d4d 0%, #0f2833 100%);
    position: relative;
    overflow: hidden;
}

.methods-section-accent::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 30%, rgba(44, 122, 123, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(183, 148, 94, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.methods-section-accent .methods-section-header {
    position: relative;
    z-index: 1;
}

.methods-section-accent .methods-section-label {
    background: rgba(183, 148, 94, 0.2);
    border-color: rgba(183, 148, 94, 0.4);
    color: var(--methods-gold-light);
}

.methods-section-accent .methods-section-title {
    color: var(--methods-white);
}

.methods-section-accent .methods-section-subtitle {
    color: rgba(255, 255, 255, 0.75);
}

/* Section Headers */
.methods-section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--methods-space-xl);
}

.methods-section-header-light .methods-section-label,
.methods-section-header-light .methods-section-title,
.methods-section-header-light .methods-section-subtitle {
    color: var(--methods-text-light);
}

.methods-section-header-light .methods-section-label {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.methods-section-header-light .methods-section-subtitle {
    color: var(--methods-text-light-muted);
}

.methods-section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--methods-primary);
    background: rgba(44, 122, 123, 0.08);
    border: 1px solid rgba(44, 122, 123, 0.15);
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: var(--methods-space-md);
}

.methods-section-title {
    font-family: var(--methods-font-serif);
    font-size: clamp(1.75rem, 3vw + 0.5rem, 2.5rem);
    font-weight: 500;
    color: var(--methods-text-dark);
    margin-bottom: var(--methods-space-sm);
    line-height: 1.2;
}

.methods-section-subtitle {
    font-size: 1.1rem;
    color: var(--methods-text-muted);
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   PROSE STYLES
   ======================================== */
.methods-prose {
    max-width: 700px;
    margin: 0 auto;
}

.methods-prose p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--methods-text-body);
    margin-bottom: var(--methods-space-md);
}

.methods-prose-lead {
    font-family: var(--methods-font-serif);
    font-size: 1.5rem !important;
    font-weight: 400;
    line-height: 1.5 !important;
    color: var(--methods-text-dark) !important;
    margin-bottom: var(--methods-space-lg) !important;
}

/* Anchor Lines */
.methods-anchor-line {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: var(--methods-space-md);
    background: rgba(44, 122, 123, 0.06);
    border-left: 3px solid var(--methods-primary);
    border-radius: 0 var(--methods-radius-md) var(--methods-radius-md) 0;
    margin-top: var(--methods-space-lg);
}

.methods-anchor-line .dna-icon {
    color: var(--methods-gold);
    font-size: 1.1rem;
}

.methods-anchor-line span {
    font-family: var(--methods-font-serif);
    font-size: 1.15rem;
    font-style: italic;
    color: var(--methods-text-dark);
}

.methods-anchor-centered {
    justify-content: center;
    text-align: center;
    border-left: none;
    border-radius: var(--methods-radius-md);
    max-width: 600px;
    margin: var(--methods-space-xl) auto 0;
}

.methods-anchor-light {
    background: rgba(255, 255, 255, 0.08);
}

.methods-anchor-light span {
    color: var(--methods-text-light);
}

/* ========================================
   PRINCIPLES SECTION
   ======================================== */
.methods-principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--methods-space-lg);
    max-width: 1100px;
    margin: 0 auto;
}

.methods-principle-card {
    background: var(--methods-white);
    padding: var(--methods-space-lg);
    border-radius: var(--methods-radius-lg);
    box-shadow: var(--methods-shadow-soft);
    border: 1px solid var(--methods-gray-200);
    transition: var(--methods-transition);
}

.methods-principle-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--methods-shadow-md);
}

.methods-principle-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--methods-primary) 0%, var(--methods-teal) 100%);
    border-radius: var(--methods-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--methods-space-md);
}

.methods-principle-icon .dna-icon {
    font-size: 1.25rem;
    color: var(--methods-white);
}

.methods-principle-card h3 {
    font-family: var(--methods-font-sans);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--methods-text-dark);
    margin-bottom: var(--methods-space-sm);
}

.methods-principle-card p {
    font-size: 0.95rem;
    color: var(--methods-text-muted);
    line-height: 1.7;
    margin: 0;
}

/* ========================================
   DATA SOURCES SECTION
   ======================================== */
.methods-data-card {
    background: var(--methods-white);
    padding: var(--methods-space-lg);
    border-radius: var(--methods-radius-lg);
    box-shadow: var(--methods-shadow-soft);
    border: 1px solid var(--methods-gray-200);
    height: 100%;
    transition: var(--methods-transition);
}

.methods-data-card:hover {
    box-shadow: var(--methods-shadow-md);
}

.methods-data-icon {
    width: 56px;
    height: 56px;
    background: rgba(44, 122, 123, 0.08);
    border-radius: var(--methods-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--methods-space-md);
}

.methods-data-icon .dna-icon {
    font-size: 1.5rem;
    color: var(--methods-primary);
}

.methods-data-card h3 {
    font-family: var(--methods-font-sans);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--methods-text-dark);
    margin-bottom: var(--methods-space-sm);
}

.methods-data-card p {
    font-size: 0.95rem;
    color: var(--methods-text-body);
    line-height: 1.7;
    margin-bottom: var(--methods-space-sm);
}

.methods-data-note {
    font-size: 0.85rem !important;
    color: var(--methods-text-muted) !important;
    font-style: italic;
    padding-top: var(--methods-space-sm);
    border-top: 1px solid var(--methods-gray-200);
    margin-bottom: 0 !important;
}

/* ========================================
   MODELING APPROACHES SECTION
   ======================================== */
.methods-modeling-list {
    max-width: 900px;
    margin: 0 auto;
}

.methods-model-item {
    background: var(--methods-white);
    border-radius: var(--methods-radius-lg);
    box-shadow: var(--methods-shadow-soft);
    border: 1px solid var(--methods-gray-200);
    margin-bottom: var(--methods-space-md);
    overflow: hidden;
    transition: var(--methods-transition);
}

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

.methods-model-header {
    display: flex;
    align-items: center;
    gap: var(--methods-space-md);
    padding: var(--methods-space-md) var(--methods-space-lg);
    cursor: pointer;
    transition: var(--methods-transition);
}

.methods-model-header:hover {
    background: var(--methods-gray-100);
}

.methods-model-header[aria-expanded="true"] {
    background: var(--methods-gray-100);
}

.methods-model-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: linear-gradient(135deg, var(--methods-primary) 0%, var(--methods-teal) 100%);
    border-radius: var(--methods-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.methods-model-icon .dna-icon {
    font-size: 1.25rem;
    color: var(--methods-white);
}

.methods-model-info {
    flex: 1;
}

.methods-model-info h3 {
    font-family: var(--methods-font-sans);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--methods-text-dark);
    margin: 0 0 4px 0;
}

.methods-model-tagline {
    font-size: 0.9rem;
    color: var(--methods-text-muted);
    margin: 0;
}

.methods-model-toggle {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--methods-text-muted);
    transition: var(--methods-transition);
}

.methods-model-header[aria-expanded="true"] .methods-model-toggle {
    transform: rotate(180deg);
}

.methods-model-content {
    border-top: 1px solid var(--methods-gray-200);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
}

.methods-model-content.show {
    max-height: 10000px; /* Large enough for any content */
    transition: max-height 0.5s ease-in;
}

.methods-model-prose {
    padding: var(--methods-space-lg);
}

.methods-model-prose p {
    font-size: 0.95rem;
    color: var(--methods-text-body);
    line-height: 1.8;
    margin-bottom: var(--methods-space-md);
}

.methods-model-prose p:last-child {
    margin-bottom: 0;
}

/* ========================================
   ADVANCED METHODS SECTION
   ======================================== */
.methods-differential-callout {
    display: flex;
    gap: var(--methods-space-lg);
    align-items: flex-start;
    background: linear-gradient(135deg, rgba(183, 148, 94, 0.15) 0%, rgba(183, 148, 94, 0.08) 100%);
    border: 1px solid rgba(183, 148, 94, 0.3);
    border-radius: var(--methods-radius-lg);
    padding: var(--methods-space-lg);
    margin-bottom: var(--methods-space-xl);
    position: relative;
    z-index: 1;
}

.methods-differential-icon {
    width: 56px;
    height: 56px;
    min-width: 56px;
    background: linear-gradient(135deg, var(--methods-gold) 0%, var(--methods-gold-light) 100%);
    border-radius: var(--methods-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(183, 148, 94, 0.25);
}

.methods-differential-icon .dna-icon {
    font-size: 1.5rem;
    color: var(--methods-white);
}

.methods-differential-content h3 {
    font-family: var(--methods-font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--methods-white);
    margin: 0 0 var(--methods-space-sm) 0;
}

.methods-differential-content p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
    margin: 0;
}

/* Advanced Methods List Styling */
.methods-advanced-list {
    position: relative;
    z-index: 1;
}

.methods-advanced-list .methods-model-item {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.methods-advanced-list .methods-model-item:hover {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    transform: translateY(-2px);
}

.methods-model-featured .methods-model-icon {
    background: linear-gradient(135deg, var(--methods-gold) 0%, var(--methods-gold-light) 100%);
}

.methods-model-badge {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--methods-white);
    background: linear-gradient(135deg, var(--methods-primary) 0%, var(--methods-teal) 100%);
    padding: 3px 10px;
    border-radius: 100px;
    margin-left: 8px;
    vertical-align: middle;
}

.methods-used-in {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: var(--methods-space-md);
    padding-top: var(--methods-space-md);
    border-top: 1px solid var(--methods-gray-200);
    font-size: 0.85rem;
    color: var(--methods-text-muted);
}

.methods-used-in .dna-icon {
    color: var(--methods-primary);
}

.methods-used-in a {
    color: var(--methods-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--methods-transition);
}

.methods-used-in a:hover {
    color: var(--methods-teal);
    text-decoration: underline;
}

/* Accent section anchor line */
.methods-section-accent .methods-anchor-line {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.methods-section-accent .methods-anchor-line .dna-icon {
    color: var(--methods-gold-light);
}

.methods-section-accent .methods-anchor-line span {
    color: rgba(255, 255, 255, 0.9);
}

/* Responsive adjustments for advanced methods */
@media (max-width: 768px) {
    .methods-differential-callout {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
    
    .methods-differential-icon {
        margin-bottom: var(--methods-space-sm);
    }
    
    .methods-model-badge {
        display: block;
        margin-left: 0;
        margin-top: 6px;
    }
}

/* ========================================
   CONCEPTS SECTION (Coordinates, Components, Distances)
   ======================================== */
.methods-concepts-grid {
    display: grid;
    gap: var(--methods-space-lg);
}

.methods-concept-card {
    background: var(--methods-white);
    border-radius: var(--methods-radius-lg);
    box-shadow: var(--methods-shadow-soft);
    border: 1px solid var(--methods-gray-200);
    overflow: hidden;
    transition: var(--methods-transition);
}

.methods-concept-card:hover {
    box-shadow: var(--methods-shadow-md);
}

.methods-concept-highlighted {
    border-color: var(--methods-primary);
    border-width: 2px;
}

.methods-concept-header {
    display: flex;
    align-items: center;
    gap: var(--methods-space-md);
    padding: var(--methods-space-md) var(--methods-space-lg);
    background: var(--methods-gray-100);
    border-bottom: 1px solid var(--methods-gray-200);
}

.methods-concept-highlighted .methods-concept-header {
    background: rgba(44, 122, 123, 0.08);
}

.methods-concept-icon {
    width: 40px;
    height: 40px;
    background: var(--methods-primary);
    border-radius: var(--methods-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.methods-concept-icon .dna-icon {
    font-size: 1rem;
    color: var(--methods-white);
}

.methods-concept-header h3 {
    font-family: var(--methods-font-sans);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--methods-text-dark);
    margin: 0;
}

.methods-concept-body {
    padding: var(--methods-space-lg);
}

.methods-concept-body p {
    font-size: 0.95rem;
    color: var(--methods-text-body);
    line-height: 1.8;
    margin-bottom: var(--methods-space-md);
}

.methods-concept-clarification {
    font-size: 0.9rem;
    color: var(--methods-primary-dark);
    background: rgba(44, 122, 123, 0.06);
    padding: var(--methods-space-sm) var(--methods-space-md);
    border-radius: var(--methods-radius-sm);
    border-left: 3px solid var(--methods-primary);
}

.methods-concept-warning {
    display: flex;
    gap: var(--methods-space-sm);
    padding: var(--methods-space-md);
    background: rgba(183, 148, 94, 0.1);
    border-radius: var(--methods-radius-md);
    border-left: 3px solid var(--methods-gold);
}

.methods-concept-warning .dna-icon {
    color: var(--methods-gold);
    font-size: 1.1rem;
    margin-top: 2px;
}

.methods-concept-warning div {
    font-size: 0.9rem;
    color: var(--methods-text-body);
    line-height: 1.6;
}

/* ========================================
   LIMITS SECTION (Dark Background)
   ======================================== */
.methods-limits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--methods-space-lg);
    max-width: 1100px;
    margin: 0 auto;
}

.methods-limit-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--methods-radius-lg);
    padding: var(--methods-space-lg);
    transition: var(--methods-transition);
}

.methods-limit-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
}

.methods-limit-header {
    display: flex;
    align-items: center;
    gap: var(--methods-space-sm);
    margin-bottom: var(--methods-space-md);
}

.methods-limit-header .dna-icon {
    font-size: 1.25rem;
    color: var(--methods-gold);
}

.methods-limit-header h3 {
    font-family: var(--methods-font-sans);
    font-size: 1rem;
    font-weight: 600;
    color: var(--methods-text-light);
    margin: 0;
}

.methods-limit-card p {
    font-size: 0.95rem;
    color: var(--methods-text-light-muted);
    line-height: 1.7;
    margin: 0;
}

/* ========================================
   RESPONSIBLE USE SECTION
   ======================================== */
.methods-guidance-list {
    display: flex;
    flex-direction: column;
    gap: var(--methods-space-lg);
}

.methods-guidance-item {
    display: flex;
    gap: var(--methods-space-lg);
    background: var(--methods-white);
    padding: var(--methods-space-lg);
    border-radius: var(--methods-radius-lg);
    box-shadow: var(--methods-shadow-soft);
    border: 1px solid var(--methods-gray-200);
    transition: var(--methods-transition);
}

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

.methods-guidance-icon {
    width: 56px;
    height: 56px;
    min-width: 56px;
    background: linear-gradient(135deg, var(--methods-primary) 0%, var(--methods-teal) 100%);
    border-radius: var(--methods-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.methods-guidance-icon .dna-icon {
    font-size: 1.5rem;
    color: var(--methods-white);
}

.methods-guidance-content h4 {
    font-family: var(--methods-font-sans);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--methods-text-dark);
    margin: 0 0 var(--methods-space-sm) 0;
}

.methods-guidance-content p {
    font-size: 0.95rem;
    color: var(--methods-text-body);
    line-height: 1.7;
    margin: 0;
}

@media (max-width: 767px) {
    .methods-guidance-item {
        flex-direction: column;
        gap: var(--methods-space-md);
    }
}

/* ========================================
   ECOSYSTEM SECTION
   ======================================== */
.methods-ecosystem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--methods-space-lg);
    max-width: 1100px;
    margin: 0 auto;
}

.methods-ecosystem-card {
    background: var(--methods-white);
    padding: var(--methods-space-lg);
    border-radius: var(--methods-radius-lg);
    box-shadow: var(--methods-shadow-soft);
    border: 1px solid var(--methods-gray-200);
    transition: var(--methods-transition);
}

.methods-ecosystem-card:hover {
    box-shadow: var(--methods-shadow-md);
    transform: translateY(-4px);
}

.methods-ecosystem-header {
    display: flex;
    align-items: center;
    gap: var(--methods-space-sm);
    margin-bottom: var(--methods-space-md);
}

.methods-ecosystem-header .dna-icon {
    font-size: 1.5rem;
    color: var(--methods-primary);
}

.methods-ecosystem-header h3 {
    font-family: var(--methods-font-sans);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--methods-text-dark);
    margin: 0;
}

.methods-ecosystem-card p {
    font-size: 0.95rem;
    color: var(--methods-text-body);
    line-height: 1.7;
    margin-bottom: var(--methods-space-sm);
}

.methods-ecosystem-note {
    font-size: 0.85rem !important;
    color: var(--methods-text-muted) !important;
    padding: var(--methods-space-sm);
    background: var(--methods-gray-100);
    border-radius: var(--methods-radius-sm);
    margin-bottom: var(--methods-space-md) !important;
}

.methods-ecosystem-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--methods-primary);
    text-decoration: none;
    transition: var(--methods-transition);
}

.methods-ecosystem-link:hover {
    color: var(--methods-primary-dark);
    gap: 10px;
}

/* ========================================
   FAQ SECTION
   ======================================== */
.methods-faq-accordion {
    display: flex;
    flex-direction: column;
    gap: var(--methods-space-sm);
}

.methods-faq-item {
    background: var(--methods-white);
    border-radius: var(--methods-radius-lg);
    box-shadow: var(--methods-shadow-soft);
    border: 1px solid var(--methods-gray-200);
    overflow: hidden;
    transition: var(--methods-transition);
}

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

.methods-faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--methods-space-md) var(--methods-space-lg);
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    transition: var(--methods-transition);
}

.methods-faq-question:hover {
    background: var(--methods-gray-100);
}

.methods-faq-question span {
    font-family: var(--methods-font-sans);
    font-size: 1rem;
    font-weight: 500;
    color: var(--methods-text-dark);
    padding-right: var(--methods-space-md);
}

.methods-faq-question .dna-icon {
    color: var(--methods-text-muted);
    transition: var(--methods-transition);
    min-width: 16px;
}

.methods-faq-question[aria-expanded="true"] .dna-icon {
    transform: rotate(180deg);
}

.methods-faq-answer {
    padding: 0 var(--methods-space-lg) var(--methods-space-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
}

.methods-faq-answer.show {
    max-height: 2000px; /* Large enough for FAQ content */
    transition: max-height 0.5s ease-in;
}

.methods-faq-answer p {
    font-size: 0.95rem;
    color: var(--methods-text-body);
    line-height: 1.8;
    margin: 0;
}

.methods-faq-contact {
    text-align: center;
    margin-top: var(--methods-space-xl);
    padding-top: var(--methods-space-lg);
    border-top: 1px solid var(--methods-gray-200);
}

.methods-faq-contact p {
    font-size: 0.95rem;
    color: var(--methods-text-muted);
    margin-bottom: var(--methods-space-sm);
}

/* ========================================
   FINAL CTA SECTION
   ======================================== */
.methods-final-cta {
    background: linear-gradient(135deg, var(--methods-deep) 0%, var(--methods-navy) 50%, var(--methods-slate) 100%);
    padding: var(--methods-space-3xl) var(--methods-space-lg);
    position: relative;
    overflow: hidden;
}

.methods-final-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(44, 122, 123, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(183, 148, 94, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.methods-final-cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.methods-final-headline {
    font-family: var(--methods-font-serif);
    font-size: clamp(1.75rem, 4vw + 0.5rem, 2.75rem);
    font-weight: 400;
    color: var(--methods-text-light);
    line-height: 1.2;
    margin-bottom: var(--methods-space-md);
}

.methods-final-headline span {
    color: var(--methods-primary-light);
}

.methods-final-subheadline {
    font-size: 1.1rem;
    color: var(--methods-text-light-muted);
    line-height: 1.7;
    margin-bottom: var(--methods-space-xl);
    max-width: 550px;
    margin-left: auto;
    margin-right: auto;
}

.methods-final-cta-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--methods-space-md);
    margin-bottom: var(--methods-space-lg);
}

.methods-final-microcopy {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--methods-text-light-muted);
    opacity: 0.8;
}

.methods-final-microcopy .dna-icon {
    color: var(--methods-gold);
}

/* ========================================
   RESPONSIVE ADJUSTMENTS
   ======================================== */
@media (max-width: 991px) {
    .methods-section {
        padding: var(--methods-space-2xl) 0;
    }
    
    .methods-hero {
        min-height: 80vh;
        padding: var(--methods-space-2xl) var(--methods-space-md);
    }
}

@media (max-width: 767px) {
    .methods-section {
        padding: var(--methods-space-xl) 0;
    }
    
    .methods-hero {
        min-height: 90vh;
        padding: var(--methods-space-xl) var(--methods-space-sm);
    }
    
    .methods-hero-headline {
        font-size: clamp(1.75rem, 6vw, 2.5rem);
    }
    
    .methods-section-header {
        margin-bottom: var(--methods-space-lg);
    }
    
    .methods-principles-grid {
        grid-template-columns: 1fr;
    }
    
    .methods-limits-grid {
        grid-template-columns: 1fr;
    }
    
    .methods-ecosystem-grid {
        grid-template-columns: 1fr;
    }
    
    .methods-final-cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .methods-btn-primary,
    .methods-btn-secondary {
        width: 100%;
        max-width: 300px;
    }
}

/* ========================================
   SVG DIAGRAM CONTAINERS & ANIMATIONS
   ======================================== */
.methods-diagram-container {
    background: rgba(15, 20, 25, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 2rem;
    margin-top: var(--methods-space-md);
    overflow-x: auto;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.methods-diagram-container:hover {
    border-color: rgba(183, 148, 94, 0.25);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.methods-advanced-list .methods-diagram-container {
    background: rgba(15, 20, 25, 0.98);
    border-color: rgba(255, 255, 255, 0.12);
}

.methods-diagram {
    width: 100%;
    max-width: 800px;
    height: auto;
    display: block;
    margin: 0 auto;
}

.methods-diagram .m-segment {
    transition: all 0.3s ease;
    cursor: pointer;
}

.methods-diagram .m-segment:hover {
    filter: brightness(1.2);
}

.methods-diagram .m-pie-segment {
    transition: all 0.4s ease;
    transform-origin: center;
}

.methods-diagram .m-pie-segment:hover {
    filter: brightness(1.15);
}

.methods-diagram .m-user-point {
    animation: pulsePointM 2s ease-in-out infinite;
}

.methods-diagram .m-match-segment {
    animation: glowSegmentM 3s ease-in-out infinite;
}

.methods-diagram .m-chromosome-row {
    transition: all 0.3s ease;
}

.methods-diagram .m-chromosome-row:hover {
    filter: brightness(1.1);
}

@keyframes pulsePointM {
    0%, 100% {
        transform: scale(1);
        filter: drop-shadow(0 0 4px rgba(245, 158, 11, 0.5));
    }
    50% {
        transform: scale(1.1);
        filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.8));
    }
}

@keyframes glowSegmentM {
    0%, 100% {
        filter: brightness(1);
    }
    50% {
        filter: brightness(1.25);
    }
}

@media (max-width: 768px) {
    .methods-diagram-container {
        padding: 1rem;
    }

    .methods-diagram {
        min-width: 500px;
    }
}

@media print {
    .methods-diagram-container {
        border: 1px solid #ccc;
        background: #f9f9f9;
        page-break-inside: avoid;
    }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
    .methods-page-nav,
    .methods-bottom-nav,
    .methods-back-to-top,
    .methods-scroll-progress,
    .methods-scroll-indicator,
    .methods-hero-cta,
    .methods-final-cta-buttons,
    .methods-faq-question .dna-icon {
        display: none !important;
    }
    
    .methods-main {
        background: white;
        color: black;
    }
    
    .methods-hero {
        min-height: auto;
        padding: 40px 20px;
        background: white;
    }
    
    .methods-hero-headline,
    .methods-hero-subheadline {
        color: black;
    }
    
    .methods-section-dark {
        background: white;
    }
    
    .methods-section-dark .methods-section-title,
    .methods-section-dark .methods-section-subtitle,
    .methods-section-dark .methods-limit-header h3,
    .methods-section-dark .methods-limit-card p {
        color: black;
    }
    
    .methods-model-content {
        display: block !important;
        height: auto !important;
    }
    
    .methods-faq-answer {
        display: block !important;
        height: auto !important;
    }
}

/* ========================================
   ANIMATIONS - MINIMAL & FUNCTIONAL
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.methods-animate-in {
    animation: fadeInUp 0.6s var(--methods-ease-gentle) forwards;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .methods-scroll-indicator .dna-icon {
        animation: none;
    }
}

/* ========================================
   RELATED PRODUCTS
   ======================================== */
.methods-related-products {
    padding: 60px 0;
    background: var(--methods-off-white);
}

.methods-related-title {
    text-align: center;
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    color: var(--methods-text-dark);
    margin-bottom: 40px;
    font-family: var(--methods-font-serif);
    font-weight: 700;
}

.methods-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

@media (max-width: 991px) {
    .methods-related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 575px) {
    .methods-related-grid {
        grid-template-columns: 1fr;
    }
}

.methods-related-card {
    background: var(--methods-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(44, 122, 123, 0.1);
    transition: 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid var(--methods-gray-200);
}

.methods-related-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(44, 122, 123, 0.15);
}

.methods-related-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-bottom: 1px solid var(--methods-gray-200);
}

.methods-related-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.methods-related-content h4 {
    font-size: 1.2rem;
    color: var(--methods-text-dark);
    margin-bottom: 8px;
    font-family: var(--methods-font-sans);
    font-weight: 600;
}

.methods-related-content p {
    font-size: 0.95rem;
    color: var(--methods-text-body);
    line-height: 1.6;
    margin-bottom: 16px;
    flex-grow: 1;
}

.methods-related-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--methods-primary);
    font-weight: 600;
    text-decoration: none;
    transition: 0.3s ease;
    margin-top: auto;
}

.methods-related-link:hover {
    color: var(--methods-primary-dark);
    text-decoration: underline;
}

.methods-related-link .dna-icon {
    transition: transform 0.2s ease;
}

.methods-related-link:hover .dna-icon {
    transform: translateX(4px);
}