/* Import Professional Inter Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* CSS Variables - Professional Energy Company Standards */
:root {
    /* 8px Grid System */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-8: 64px;
    --space-10: 80px;
    --space-12: 96px;

    /* Brand Colors (from logo) */
    --color-brand-navy: #1B4682;
    --color-brand-navy-dark: #14366A;
    --color-brand-navy-light: #2D5AA0;
    --color-brand-gold: #F5B800;
    --color-brand-gold-light: #FFD54F;

    /* Colors - Professional Energy Palette */
    --color-primary-accent: #29B675;      /* Renewable energy green */

    /* Header Colors */
    --header-bg: #FFFFFF;
    --header-border: #E5E9F0;
    --nav-text: #2C3E50;
    --nav-text-hover: #1B4682;
    --nav-text-active: #1B4682;

    /* Text Colors */
    --color-text-dark: #1b1534;
    --color-text-body: #333333;
    --color-text-muted: #555555;
    --color-text-light: #e0e0e0;
    --color-on-navy: #FFFFFF;
    --color-on-navy-muted: #E5EBF5;

    /* Backgrounds */
    --color-bg-white: #ffffff;
    --color-bg-light: #f8f9fa;
    --color-bg-card: #ffffff;

    /* Borders & Shadows */
    --border-color: #e8e8e8;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);

    /* Container */
    --container-max: 1200px;
    --container-padding: 24px;

    /* Gradients */
    --gradient-navy: linear-gradient(135deg, #1B4682 0%, #14366A 100%);
    --gradient-hero: linear-gradient(135deg, rgba(27, 70, 130, 0.92) 0%, rgba(20, 54, 106, 0.95) 100%);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.25;
    font-weight: 600;
    color: var(--color-text-dark);
}

h1 {
    font-size: 3rem;           /* 48px */
    font-weight: 700;
}

h2 {
    font-size: 2.25rem;        /* 36px */
}

h3 {
    font-size: 1.5rem;         /* 24px */
}

p {
    line-height: 1.6;
    color: var(--color-text-muted);
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Header & Navigation */
header {
    background: var(--header-bg);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--header-border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    height: 70px;
    transition: box-shadow 0.3s ease;
}

.navbar {
    height: 100%;
    padding: var(--space-2) 0;
    display: flex;
    align-items: center;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 48px;
    width: auto;
    display: block;
}

.logo h1 {
    display: none;
}

.logo span {
    color: var(--color-brand-gold);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-5);
    margin: 0;
    margin-left: var(--space-6);
}

.nav-links a {
    color: var(--nav-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.2s ease;
    padding: var(--space-1) 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-brand-navy);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--nav-text-active);
}

.nav-links a:focus-visible {
    outline: 3px solid var(--color-brand-navy);
    outline-offset: 4px;
    border-radius: 4px;
}

/* Hero Section */
.hero {
    background: var(--gradient-hero),
                url('https://images.unsplash.com/photo-1509391366360-2e959784a276?w=1920&q=80') center/cover;
    color: var(--color-bg-white);
    padding: 160px 0 var(--space-12);
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.05)"/></svg>');
    opacity: 0.3;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 4px;
    background: linear-gradient(90deg, transparent 0%, var(--color-brand-gold) 50%, transparent 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero h2 {
    font-size: 3rem;           /* 48px */
    margin-bottom: var(--space-3);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-bg-white);  /* Force white text */
}

.hero p {
    font-size: 1.125rem;       /* 18px - reduced from 1.3rem */
    margin-bottom: var(--space-5);
    color: var(--color-text-light);
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px var(--space-4);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-weight: 600;
    font-size: 0.9375rem;
    border: none;
    cursor: pointer;
    min-height: 48px;
    position: relative;
}

.btn-primary {
    background: var(--color-brand-navy);
    color: var(--color-on-navy);
    box-shadow: 0 2px 8px rgba(27, 70, 130, 0.15);
}

.btn-primary:hover {
    background: var(--color-brand-navy-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(27, 70, 130, 0.25);
}

.btn-primary:focus-visible {
    outline: 3px solid var(--color-brand-navy);
    outline-offset: 4px;
}

.btn-primary:disabled,
.btn:disabled {
    background: #94A3B8;
    cursor: not-allowed;
    transform: none;
    opacity: 0.7;
    box-shadow: none;
}

.btn-primary:disabled::after,
.btn:disabled::after {
    content: '';
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    border: 2px solid #fff;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: translateY(-50%) rotate(360deg); }
}

.btn-secondary {
    background: var(--color-primary-accent);
    color: white;
}

.btn-secondary:hover {
    background: #239960;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(41, 182, 117, 0.25);
}

/* Trust Bar Section */
.trust-bar {
    background: var(--color-bg-light);
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--border-color);
}

.trust-items {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-6);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-body);
}

.trust-item-icon {
    font-size: 1.5rem;
    color: var(--color-brand-navy);
}

.trust-item-content h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-brand-navy);
    margin: 0;
    line-height: 1.2;
}

.trust-item-content p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0;
    line-height: 1.2;
}

/* Investment Thesis Section */
.investment-thesis {
    padding: var(--space-10) 0;
    background: var(--color-bg-white);
}

.investment-thesis h2 {
    font-size: 2.25rem;
    text-align: center;
    margin-bottom: var(--space-8);
    color: var(--color-text-dark);
}

.thesis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-4);
    max-width: 1000px;
    margin: 0 auto;
}

.thesis-card {
    background: var(--color-bg-card);
    padding: var(--space-5) var(--space-4);
    border-radius: 8px;
    border-left: 4px solid var(--color-brand-navy);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.thesis-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.thesis-card h3 {
    font-size: 1.375rem;
    margin-bottom: var(--space-2);
    color: var(--color-brand-navy);
    font-weight: 600;
}

.thesis-card p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin: 0;
}

/* Video Section */
.video-section {
    padding: var(--space-10) 0;
    background: var(--color-bg-light);
}

.video-section h2 {
    font-size: 2.25rem;
    margin-bottom: var(--space-3);
    color: var(--color-text-dark);
    text-align: center;
}

.video-section p {
    font-size: 1.0625rem;
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--space-6);
    color: var(--color-text-muted);
}

.video-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Intro Section */
.intro {
    padding: var(--space-10) 0;
    background: var(--color-bg-light);
}

.intro h2 {
    font-size: 2.25rem;        /* 36px */
    margin-bottom: var(--space-4);
    color: var(--color-text-dark);
    text-align: center;
}

.intro p {
    font-size: 1.0625rem;      /* 17px - reduced from 1.15rem */
    text-align: center;
    max-width: 820px;
    margin: 0 auto var(--space-4);
    color: var(--color-text-muted);
}

/* Energy Solutions / Cards */
.energy-solutions {
    padding: var(--space-10) 0;
    background: var(--color-bg-white);
}

.energy-solutions h2 {
    font-size: 2.25rem;
    text-align: center;
    margin-bottom: var(--space-8);
    color: var(--color-text-dark);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-4);
    max-width: 1000px;
    margin: 0 auto;
}

.solution-card {
    background: var(--color-bg-card);
    padding: var(--space-6) var(--space-4);
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.solution-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-brand-navy) 0%, var(--color-brand-gold) 100%);
    border-radius: 12px 12px 0 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(27, 70, 130, 0.12);
    border-color: var(--color-brand-navy-light);
}

.solution-card:hover::after {
    opacity: 1;
}

.solution-card .icon {
    font-size: 3rem;           /* Reduced from 4rem */
    margin-bottom: var(--space-3);
    opacity: 0.9;
}

.solution-card h3 {
    font-size: 1.375rem;       /* 22px - reduced from 1.8rem */
    margin-bottom: var(--space-2);
    color: var(--color-text-dark);
    font-weight: 600;
}

.solution-card p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;      /* 15px */
    line-height: 1.6;
}

/* Stats Section */
.stats {
    background: var(--gradient-navy);
    color: var(--color-bg-white);
    padding: var(--space-8) 0;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.3;
}

.stats .container {
    position: relative;
    z-index: 1;
}

.stats h2 {
    color: var(--color-bg-white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
    text-align: center;
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--color-brand-gold);
    margin-bottom: var(--space-2);
    font-weight: 700;
}

.stat-item p {
    font-size: 1rem;
    color: var(--color-on-navy-muted);
}

/* Contact Section */
.contact {
    padding: var(--space-10) 0;
    background: var(--color-bg-light);
    text-align: center;
}

.contact h2 {
    font-size: 2.25rem;
    margin-bottom: var(--space-3);
    color: var(--color-text-dark);
}

.contact > p {
    font-size: 1.0625rem;
    margin-bottom: var(--space-5);
    color: var(--color-text-muted);
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.contact-info {
    max-width: 600px;
    margin: 0 auto;
    background: var(--color-bg-white);
    padding: var(--space-5);
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

.contact-info p {
    font-size: 1rem;
    margin: var(--space-2) 0;
    color: var(--color-text-body);
}

.contact-info strong {
    color: var(--color-text-dark);
}

/* Benefits Section */
.benefits-section {
    padding: var(--space-10) 0;
    background: var(--color-bg-white);
}

.benefits-section h2 {
    font-size: 2.25rem;
    text-align: center;
    margin-bottom: var(--space-8);
    color: var(--color-text-dark);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-4);
}

.benefit-card {
    background: var(--color-bg-card);
    padding: var(--space-4);
    border-radius: 8px;
    border-left: 4px solid var(--color-primary-accent);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.benefit-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.benefit-card h3 {
    font-size: 1.25rem;        /* 20px - reduced from 1.5rem */
    margin-bottom: var(--space-3);
    color: var(--color-text-dark);
    font-weight: 600;
}

.benefit-card ul {
    list-style: none;
    padding-left: 0;
}

.benefit-card li {
    padding: var(--space-1) 0;
    color: var(--color-text-muted);
    font-size: 0.9375rem;      /* 15px */
    position: relative;
    padding-left: var(--space-3);
    line-height: 1.6;
}

.benefit-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary-accent);
    font-weight: 600;
}

/* Footer */
footer {
    background: var(--color-brand-navy);
    color: var(--color-bg-white);
    text-align: center;
    padding: var(--space-5) 0;
}

footer p {
    color: var(--color-on-navy-muted);
    font-size: 0.9375rem;
}

/* Solar Energy Assistant Product Page Styles */

/* Product Hero */
.product-hero {
    background: linear-gradient(135deg, #F8FAFB 0%, #FFFFFF 100%);
    padding: 140px 0 var(--space-10);
    margin-top: 70px;
    border-bottom: 1px solid var(--border-color);
}

.product-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    background: linear-gradient(135deg, var(--color-brand-navy) 0%, var(--color-brand-navy-light) 100%);
    color: white;
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
    letter-spacing: 0.02em;
}

.product-hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: center;
}

.product-hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: var(--space-2);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-brand-navy);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.hero-description {
    font-size: 1.0625rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-5);
}

.hero-cta-group {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}

.btn-secondary-outline {
    background: transparent;
    color: var(--color-brand-navy);
    border: 2px solid var(--color-brand-navy);
}

.btn-secondary-outline:hover {
    background: var(--color-brand-navy);
    color: white;
    transform: translateY(-2px);
}

.hero-trust-signals {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.trust-signal {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.trust-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--color-primary-accent);
    color: white;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
}

/* Product Hero Image */
.product-hero-visual img {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(27, 70, 130, 0.12);
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-hero-visual img:hover {
    transform: scale(1.02);
    box-shadow: 0 24px 72px rgba(27, 70, 130, 0.18);
}

/* Product Features Section */
.product-features {
    padding: var(--space-12) 0;
    background: var(--color-bg-white);
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto var(--space-8);
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: var(--space-2);
    color: var(--color-text-dark);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-4);
}

.feature-card {
    background: var(--color-bg-white);
    padding: var(--space-5);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--color-brand-navy-light);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-3);
}

.icon-emoji {
    font-size: 1.75rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-2);
    color: var(--color-text-dark);
}

.feature-card p {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--color-text-muted);
}

/* Technical Overview Section */
.technical-overview {
    padding: var(--space-12) 0;
    background: linear-gradient(180deg, #F8FAFB 0%, #FFFFFF 100%);
}

.section-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-brand-navy);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-2);
}

.technical-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
    align-items: center;
}

.lead {
    font-size: 1.125rem;
    color: var(--color-text-body);
    margin-bottom: var(--space-6);
    line-height: 1.7;
}

.tech-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.tech-item {
    border-left: 3px solid var(--color-brand-gold);
    padding-left: var(--space-3);
}

.tech-badge {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-brand-navy);
    background: rgba(27, 70, 130, 0.08);
    padding: 4px 12px;
    border-radius: 4px;
    margin-bottom: var(--space-1);
}

.tech-item p {
    font-size: 0.9375rem;
    line-height: 1.6;
}

.architecture-diagram {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
}

.diagram-layer {
    margin-bottom: var(--space-4);
}

.diagram-node {
    background: var(--color-bg-light);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: var(--space-3);
    text-align: center;
    font-weight: 600;
    color: var(--color-text-dark);
}

.diagram-node.accent {
    background: var(--color-brand-navy);
    color: white;
    border-color: var(--color-brand-navy);
}

.diagram-node.success {
    background: var(--color-primary-accent);
    color: white;
    border-color: var(--color-primary-accent);
}

.diagram-arrow {
    text-align: center;
    font-size: 1.5rem;
    color: var(--color-brand-navy);
    margin: var(--space-1) 0;
}

.diagram-sublayer {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-2);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    justify-content: center;
    flex-wrap: wrap;
}

.diagram-sublayer span {
    background: var(--color-bg-light);
    padding: 4px 12px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

/* Use Cases Section */
.use-cases {
    padding: var(--space-12) 0;
    background: var(--color-bg-white);
}

.use-cases h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: var(--space-8);
}

.use-case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(480px, 1fr));
    gap: var(--space-6);
    max-width: 1100px;
    margin: 0 auto;
}

.use-case-card {
    background: var(--color-bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.use-case-persona {
    background: linear-gradient(135deg, var(--color-brand-navy) 0%, var(--color-brand-navy-light) 100%);
    color: white;
    padding: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.persona-icon {
    font-size: 2rem;
}

.use-case-persona h3 {
    color: white;
    margin: 0;
}

.use-case-scenario {
    padding: var(--space-5);
    display: grid;
    gap: var(--space-4);
}

.scenario-before h4,
.scenario-after h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: var(--space-2);
    font-weight: 700;
}

.scenario-before h4 {
    color: #DC2626;
}

.scenario-after h4 {
    color: var(--color-primary-accent);
}

.scenario-before ul,
.scenario-after ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.scenario-before li,
.scenario-after li {
    padding: var(--space-1) 0 var(--space-1) var(--space-4);
    font-size: 0.9375rem;
    line-height: 1.6;
    position: relative;
}

.scenario-before li::before {
    content: '✗';
    position: absolute;
    left: 0;
    color: #DC2626;
    font-weight: 700;
}

.scenario-after li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary-accent);
    font-weight: 700;
}

/* Data Sources Section */
.data-sources {
    padding: var(--space-10) 0;
    background: var(--color-bg-light);
}

.section-intro {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--space-8);
    font-size: 1.0625rem;
    color: var(--color-text-muted);
}

.source-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.source-item {
    background: white;
    padding: var(--space-4);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.source-logo {
    font-size: 2.5rem;
    margin-bottom: var(--space-2);
}

.source-item h4 {
    font-size: 1.125rem;
    margin-bottom: var(--space-1);
    color: var(--color-text-dark);
}

.source-item p {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--color-text-muted);
}

.update-frequency {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.update-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    background: var(--color-brand-navy);
    color: white;
    padding: 8px 20px;
    border-radius: 24px;
    font-weight: 600;
    font-size: 0.9375rem;
    margin-bottom: var(--space-2);
}

/* Featured Product Section (Homepage) */
.featured-product {
    padding: var(--space-12) 0;
    background: var(--color-bg-white);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.featured-product-layout {
    display: grid;
    grid-template-columns: 5fr 7fr;
    gap: var(--space-10);
    align-items: center;
}

.featured-product-visual {
    position: relative;
}

.featured-product-visual img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(27, 70, 130, 0.15);
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    object-fit: cover;
    aspect-ratio: 4/3;
}

.featured-product-visual img:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(27, 70, 130, 0.22);
}

.preview-badge {
    position: absolute;
    top: 24px;
    left: 24px;
    background: var(--color-brand-navy);
    color: white;
    padding: 8px 20px;
    border-radius: 24px;
    font-size: 0.8125rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(27, 70, 130, 0.3);
    z-index: 10;
}

.eyebrow {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-brand-gold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-1);
}

.featured-subtitle {
    font-size: 1.25rem;
    color: var(--color-brand-navy);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.feature-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin: var(--space-4) 0;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.9375rem;
    color: var(--color-text-body);
}

.highlight-icon {
    font-size: 1.25rem;
}

.featured-cta-group {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-5);
}

/* Early Access Section */
.early-access {
    padding: var(--space-12) 0;
    background: linear-gradient(135deg, var(--color-brand-navy) 0%, var(--color-brand-navy-dark) 100%);
    color: white;
}

.early-access-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
    align-items: center;
}

.early-access h2 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: var(--space-3);
}

.early-access p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.0625rem;
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.access-benefits {
    list-style: none;
    padding: 0;
}

.access-benefits li {
    padding: var(--space-1) 0 var(--space-1) var(--space-4);
    color: rgba(255, 255, 255, 0.9);
    position: relative;
}

.access-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-brand-gold);
    font-weight: 700;
}

.early-access-form {
    background: white;
    padding: var(--space-6);
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

/* Form Feedback Messages - Professional UX Standards */
.success-message {
    display: none;
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    color: white;
    padding: 1.25rem 1.5rem;
    border-radius: 8px;
    margin-bottom: var(--space-4);
    text-align: left;
    font-size: 1rem;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    border-left: 4px solid #059669;
    animation: slideDown 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.success-message::before {
    content: '✓';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    margin-right: 12px;
    font-weight: 700;
    font-size: 1rem;
    vertical-align: middle;
}

.success-message.show {
    display: block;
}

.success-message strong {
    display: block;
    font-weight: 700;
    font-size: 1.0625rem;
    margin-bottom: 4px;
}

.error-message {
    display: none;
    background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
    color: white;
    padding: 1.25rem 1.5rem;
    border-radius: 8px;
    margin-bottom: var(--space-4);
    text-align: left;
    font-size: 1rem;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
    border-left: 4px solid #DC2626;
    animation: slideDown 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.error-message::before {
    content: '!';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    margin-right: 12px;
    font-weight: 700;
    font-size: 1.125rem;
    vertical-align: middle;
}

.error-message.show {
    display: block;
}

.error-message strong {
    display: block;
    font-weight: 700;
    font-size: 1.0625rem;
    margin-bottom: 4px;
}

@keyframes slideDown {
    0% {
        opacity: 0;
        transform: translateY(-20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.required {
    color: #FF4444;
    margin-left: 2px;
}

.form-group {
    margin-bottom: var(--space-3);
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--color-text-dark);
    margin-bottom: var(--space-1);
    font-size: 0.9375rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9375rem;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-brand-navy);
    box-shadow: 0 0 0 3px rgba(27, 70, 130, 0.1);
}

.full-width {
    width: 100%;
}

.form-note {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-2);
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --container-padding: 16px;
    }

    .nav-links {
        gap: var(--space-2);
        font-size: 0.875rem;
    }

    .logo img {
        height: 40px;
    }

    .trust-items {
        gap: var(--space-4);
    }

    .trust-item {
        flex-direction: column;
        text-align: center;
        gap: var(--space-1);
    }

    .hero {
        padding: 120px 0 var(--space-8);
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .hero .btn {
        display: block;
        width: 100%;
        margin-bottom: var(--space-2);
    }

    h2 {
        font-size: 1.875rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    .solutions-grid,
    .benefits-grid,
    .thesis-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        gap: var(--space-5);
    }

    .stat-item h3 {
        font-size: 2rem;
    }

    .product-hero-grid,
    .technical-grid,
    .early-access-content {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .product-hero h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-cta-group {
        flex-direction: column;
    }

    .hero-cta-group .btn {
        width: 100%;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .use-case-grid {
        grid-template-columns: 1fr;
    }

    .mockup-grid {
        grid-template-columns: 1fr;
    }

    .featured-product-layout {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .featured-cta-group {
        flex-direction: column;
    }

    .featured-cta-group .btn {
        width: 100%;
    }
}

@media (max-width: 640px) {
    .product-badge {
        font-size: 0.75rem;
        padding: 4px 12px;
    }

    .section-header h2,
    .use-cases h2 {
        font-size: 1.875rem;
    }

    .source-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .navbar .container {
        flex-direction: column;
        gap: var(--space-2);
        padding-top: var(--space-1);
        padding-bottom: var(--space-1);
    }

    header {
        height: auto;
    }

    .nav-links {
        gap: var(--space-2);
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        margin-top: 90px;
    }
}