/* ==========================================================================
   AI Leadership Landing Page - Premium Cosmic Tech Design
   Powered by Modern CSS Guidelines (Google Chrome / MS Edge Best Practices)
   ========================================================================== */

/* 1. DESIGN TOKENS & CUSTOM PROPERTIES */
:root {
    /* Color Palette - HSL (Harmonious Slate & Glowing Accents) */
    --color-bg-deep: hsl(225, 25%, 6%);
    --color-bg-dark: hsl(225, 20%, 9%);
    --color-bg-card: hsla(225, 20%, 14%, 0.45);
    --color-border-card: hsla(225, 20%, 30%, 0.25);
    
    --color-text-primary: hsl(210, 20%, 96%);
    --color-text-secondary: hsl(215, 12%, 76%);
    --color-text-muted: hsl(215, 8%, 56%);
    
    --color-primary: hsl(180, 100%, 46%); /* Glowing Teal/Cyan */
    --color-primary-glow: hsla(180, 100%, 46%, 0.15);
    --color-primary-dark: hsl(180, 100%, 30%);
    
    --color-secondary: hsl(265, 88%, 66%); /* Electric Indigo/Violet */
    --color-secondary-glow: hsla(265, 88%, 66%, 0.15);
    --color-secondary-dark: hsl(265, 80%, 50%);
    
    --color-success: hsl(145, 80%, 45%);
    --color-error: hsl(355, 85%, 60%);

    /* Typography & Spacing */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* Layout Variables */
    --container-width: 1200px;
    --border-radius-lg: 24px;
    --border-radius-md: 16px;
    --border-radius-sm: 8px;
    
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
}

/* 2. BASE RESET & GLOBAL STYLES */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    background-color: var(--color-bg-deep);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg-deep);
}
::-webkit-scrollbar-thumb {
    background: hsl(225, 15%, 20%);
    border-radius: 5px;
    border: 2px solid var(--color-bg-deep);
}
::-webkit-scrollbar-thumb:hover {
    background: hsl(225, 15%, 30%);
}

/* Typography Fluid Scaling & Optimizations */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
    text-wrap: balance; /* Modern CSS Text Wrap Balancing */
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem); /* Fluid typography scaling */
    margin-bottom: 1.5rem;
}

h2 {
    font-size: clamp(2rem, 3.5vw, 2.75rem);
    margin-bottom: 1rem;
}

h3 {
    font-size: clamp(1.35rem, 2vw, 1.75rem);
}

p {
    font-size: clamp(1rem, 1.1vw, 1.15rem);
    color: var(--color-text-secondary);
    text-wrap: pretty;
}

strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}
a:hover {
    color: var(--color-text-primary);
}

/* 3. LAYOUT UTILITIES & AMBIENT EFFECTS */
.ambient-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.45;
}

.bg-glow-1 {
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
    top: -10vw;
    right: -10vw;
    animation: floatGlow1 25s infinite alternate ease-in-out;
}

.bg-glow-2 {
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--color-secondary) 0%, transparent 70%);
    top: 30vh;
    left: -20vw;
    animation: floatGlow2 30s infinite alternate ease-in-out;
}

.bg-glow-3 {
    width: 45vw;
    height: 45vw;
    background: radial-gradient(circle, var(--color-primary-dark) 0%, transparent 70%);
    bottom: -10vw;
    right: 10vw;
}

@keyframes floatGlow1 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-8vw, 10vh) scale(1.1); }
}

@keyframes floatGlow2 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(8vw, -10vh) scale(1.15); }
}

/* Premium Glassmorphic Card Styling */
.glass-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-card);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.glass-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, transparent 100%);
    pointer-events: none;
    z-index: 1;
}

/* 4. BUTTONS & INTERACTIVE ELEMENTS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 2rem;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    position: relative;
    overflow: hidden;
    z-index: 2;
}

.btn-primary {
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-bg-deep);
    box-shadow: 0 4px 20px rgba(180, 100, 255, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(180, 100, 255, 0.5);
    color: var(--color-bg-deep);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.04);
    color: var(--color-text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-3px);
}

.btn-nav {
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* Highlight text gradient */
.highlight-text {
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 5. HEADER & NAVIGATION */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(8, 11, 20, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.35rem;
    color: var(--color-text-primary);
    letter-spacing: 0.05em;
}

.logo-accent {
    color: var(--color-primary);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.main-nav a:not(.btn) {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding: 0.25rem 0;
}

.main-nav a:not(.btn)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-fast);
}

.main-nav a:not(.btn):hover {
    color: var(--color-text-primary);
}

.main-nav a:not(.btn):hover::after {
    width: 100%;
}

/* 6. HERO SECTION */
.hero-section {
    position: relative;
    padding: 160px 0 100px 0;
    min-height: 90vh;
    display: flex;
    align-items: center;
    z-index: 1;
}

.hero-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    max-width: 700px;
}

.tagline {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    display: inline-block;
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 0.25rem;
}

.author-strip {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 0.5rem 0 2rem 0;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 50px;
    padding: 0.5rem 1.5rem 0.5rem 0.5rem;
    width: fit-content;
}

.monogram {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 50%;
    color: var(--color-bg-deep);
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 0 15px var(--color-primary-glow);
}

.author-info {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.author-info strong {
    font-size: 0.95rem;
    color: var(--color-text-primary);
}

.author-info span {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.hero-description {
    font-size: clamp(1.1rem, 1.3vw, 1.35rem);
    margin-bottom: 2.5rem;
    color: var(--color-text-secondary);
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    width: 100%;
    height: 450px;
}

#hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none; /* Let clicks pass through to stats card and links */
}

.hero-stats-card {
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    border: 1px solid rgba(180, 100, 255, 0.15);
    z-index: 2; /* Float on top of the interactive canvas particles */
    position: relative;
}

.newsletter-signup-card {
    max-width: 480px;
    padding: 0.75rem;
    background: var(--color-bg-card);
    border-color: rgba(180, 100, 255, 0.15);
}

.newsletter-signup-card::before {
    display: none;
}

.newsletter-signup-card iframe {
    display: block;
    position: relative;
    z-index: 2;
    width: 100%;
    height: 280px;
    border: 0;
    background-color: #ffffff;
    border-radius: calc(var(--border-radius-lg) - 0.75rem);
}

.stats-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.35rem 0.85rem;
    border-radius: 50px;
    margin-bottom: 2rem;
    color: var(--color-text-secondary);
}

.stats-grid {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.stat-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 1rem;
}

.stat-item:last-child {
    border: none;
    padding-bottom: 0;
}

.stat-num {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 2.5rem;
    line-height: 1;
}

.glow-cyan {
    color: var(--color-primary);
    text-shadow: 0 0 20px var(--color-primary-glow);
}

.glow-indigo {
    color: var(--color-secondary);
    text-shadow: 0 0 20px var(--color-secondary-glow);
}

.stat-label {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-align: right;
}

.stat-footer-text {
    margin-top: 2rem;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-align: center;
}

/* 7. STUDIES SECTION (INTERACTIVE EXPLORER) */
.studies-section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

.section-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem auto;
}

.section-subtitle {
    margin-top: 1rem;
}

.tab-navigation {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.tab-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--color-text-secondary);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.75rem 1.75rem;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-text-primary);
}

.tab-btn.active {
    background: var(--color-primary);
    color: var(--color-bg-deep);
    border-color: var(--color-primary);
    box-shadow: 0 0 25px var(--color-primary-glow);
}

.study-card {
    padding: 3.5rem;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.study-card-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.study-visual-col {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.metric-container {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    text-align: center;
}

.metric-big {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 5rem;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
    text-shadow: 0 0 30px var(--color-primary-glow);
    transition: var(--transition-smooth);
}

.metric-sub {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition-smooth);
}

.bar-chart-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.bar-item {
    display: grid;
    grid-template-columns: 1fr 2fr 40px;
    align-items: center;
    gap: 1.5rem;
}

.bar-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    line-height: 1.2;
}

.bar-track {
    background: rgba(255, 255, 255, 0.05);
    height: 10px;
    border-radius: 5px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    border-radius: 5px;
    width: 0; /* Animated dynamically by JS to the --target-width custom variable */
    transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.bar-cyan {
    background: linear-gradient(90deg, var(--color-primary) 0%, hsl(185, 100%, 60%) 100%);
}

.bar-indigo {
    background: linear-gradient(90deg, var(--color-secondary) 0%, hsl(265, 100%, 75%) 100%);
}

.bar-val {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--color-text-primary);
    text-align: right;
}

.study-text-col {
    display: flex;
    flex-direction: column;
}

.study-badge {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: var(--color-secondary);
    margin-bottom: 1rem;
}

.study-card h3 {
    margin-bottom: 1rem;
}

.study-lead {
    font-size: 1.15rem;
    color: var(--color-text-primary);
    margin-bottom: 2rem;
}

.study-blockquote {
    border-left: 3px solid var(--color-secondary);
    padding-left: 1.5rem;
    margin-bottom: 2.5rem;
    font-style: italic;
    color: var(--color-text-secondary);
}

.study-takeaway {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-sm);
    padding: 1.25rem;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

/* 8. BRIEFINGS SECTION & MODAL */
.briefings-section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

.briefings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.briefing-card {
    padding: 2.5rem 2.25rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
    outline: none;
}

.briefing-card:focus-visible {
    border-color: var(--color-primary);
    box-shadow: 0 0 20px var(--color-primary-glow);
}

.briefing-card:hover {
    transform: translateY(-8px);
    border-color: rgba(180, 100, 255, 0.35);
    background: hsla(225, 20%, 16%, 0.6);
    box-shadow: 0 15px 30px rgba(180, 100, 255, 0.15);
}

.card-kicker {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.card-kicker svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.briefing-card h3 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.card-brief-answer {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.card-arrow-link {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-secondary);
    transition: var(--transition-smooth);
    margin-top: auto;
}

.briefing-card:hover .card-arrow-link {
    color: var(--color-primary);
    transform: translateX(5px);
}

/* NATIVE DIALOG MODAL STYLING & ANIMATIONS */
dialog.glass-modal {
    border: none;
    outline: none;
    border-radius: var(--border-radius-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-card);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    width: 90%;
    max-width: 820px;
    max-height: 85vh;
    padding: 0;
    box-shadow: 0 25px 60px -12px rgba(0, 0, 0, 0.75);
    color: var(--color-text-primary);
    margin: auto;
    overflow-y: auto;
    
    /* Chromium native transition entry/exit triggers */
    transition: translate 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                display 0.4s allow-discrete,
                overlay 0.4s allow-discrete;
    opacity: 0;
    translate: 0 50px;
}

dialog.glass-modal[open] {
    opacity: 1;
    translate: 0 0;
}

/* Starting Style for Entry Transition */
@starting-style {
    dialog.glass-modal[open] {
        opacity: 0;
        translate: 0 50px;
    }
}

/* Dialog Backdrop Blur */
dialog.glass-modal::backdrop {
    background-color: rgba(8, 11, 20, 0);
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    transition: background-color 0.4s,
                backdrop-filter 0.4s,
                display 0.4s allow-discrete,
                overlay 0.4s allow-discrete;
}

dialog.glass-modal[open]::backdrop {
    background-color: rgba(8, 11, 20, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

@starting-style {
    dialog.glass-modal[open]::backdrop {
        background-color: rgba(8, 11, 20, 0);
        backdrop-filter: blur(0px);
        -webkit-backdrop-filter: blur(0px);
    }
}

/* Modal Content Structure */
.modal-content {
    padding: 3rem;
    position: relative;
}

.modal-header {
    margin-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 1.5rem;
    position: relative;
}

.modal-kicker {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.15em;
    color: var(--color-primary);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.modal-header h2 {
    font-size: 2rem;
    line-height: 1.25;
    padding-right: 2.5rem;
}

.modal-close-btn {
    position: absolute;
    top: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--color-text-secondary);
    font-size: 1.75rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    line-height: 1;
}

.modal-close-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    transform: rotate(90deg);
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.modal-lead-answer {
    font-size: 1.2rem;
    color: var(--color-text-primary);
    line-height: 1.6;
    font-weight: 500;
}

/* Modal Grid Columns */
.modal-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    .modal-grid-2 {
        grid-template-columns: 1fr;
    }
    .modal-content {
        padding: 2.5rem 1.5rem;
    }
}

.modal-detail-card {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius-md);
    padding: 1.75rem;
}

.modal-detail-card strong {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    color: var(--color-primary);
    display: block;
    margin-bottom: 0.75rem;
}

.modal-detail-card p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* Step lists in Modal 2 */
.modal-steps-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.modal-steps-list li {
    display: flex;
    gap: 1.5rem;
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
}

.step-num {
    width: 40px;
    height: 40px;
    background: hsla(265, 88%, 66%, 0.15);
    border: 1px solid hsla(265, 88%, 66%, 0.3);
    border-radius: 50%;
    color: var(--color-secondary);
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.step-text {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.step-text strong {
    font-size: 1.1rem;
    color: var(--color-text-primary);
}

.step-text p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* Bullet list for modal 6 */
.modal-bullet-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.modal-bullet-list li {
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.modal-bullet-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

.modal-outro {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 1.5rem;
    font-size: 1rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Legal links footer layout */
.footer-legal-nav {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.footer-legal-nav a {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.footer-legal-nav a:hover {
    color: var(--color-primary);
}

/* 9. ASSESSMENT SECTION & CTA FORM */
.assessment-section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

.assessment-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.assessment-text h2 {
    margin-bottom: 1.5rem;
}

.assessment-text p {
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
}

.benefits-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.benefits-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.05rem;
    font-weight: 500;
}

.check-icon {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.assessment-form-col {
    position: relative;
}

.form-card {
    padding: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.form-card h3 {
    margin-bottom: 2rem;
    text-align: center;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    position: relative;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.form-group input, 
.form-group select {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    padding: 0.85rem 1.25rem;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition-fast);
    outline: none;
    width: 100%;
}

.form-group input::placeholder {
    color: var(--color-text-muted);
}

.form-group input:focus, 
.form-group select:focus {
    border-color: var(--color-primary);
    background: rgba(0, 0, 0, 0.5);
    box-shadow: 0 0 15px var(--color-primary-glow);
}

/* User-invalid: browser native styling for invalid inputs */
.form-group input:not(:placeholder-shown):user-invalid,
.form-group select:not(:placeholder-shown):user-invalid {
    border-color: var(--color-error);
    box-shadow: 0 0 15px rgba(255, 80, 80, 0.15);
}

/* Error message styling */
.error-msg {
    display: none;
    color: var(--color-error);
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

.form-group.has-error .error-msg {
    display: block;
}

.form-group.has-error input,
.form-group.has-error select {
    border-color: var(--color-error);
}

/* Accent Color Customization for Native Controls */
select {
    accent-color: var(--color-primary);
}

/* Success Message Dialog Overlay */
.success-overlay {
    position: absolute;
    inset: 0;
    background: rgba(8, 11, 20, 0.95);
    backdrop-filter: blur(15px);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-smooth);
}

.success-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.success-box {
    text-align: center;
    max-width: 380px;
    transform: translateY(20px);
    transition: var(--transition-smooth);
}

.success-overlay.active .success-box {
    transform: translateY(0);
}

.success-icon {
    width: 80px;
    height: 80px;
    background: hsla(145, 80%, 45%, 0.1);
    color: var(--color-success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem auto;
    border: 1px solid hsla(145, 80%, 45%, 0.2);
}

.success-icon svg {
    width: 44px;
    height: 44px;
}

.success-box h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.success-box p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

/* 10. FOOTER & STUDY CITATIONS */
.main-footer {
    background: var(--color-bg-dark);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 5rem 0 3rem 0;
    position: relative;
    z-index: 1;
}

.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.footer-links p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.footer-citations {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 2rem;
}

.footer-citations h4 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-primary);
    margin-bottom: 1.5rem;
}

.footer-citations ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.footer-citations li {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.footer-citations li strong {
    color: var(--color-primary);
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.footer-citations li em {
    color: var(--color-text-muted);
}

.footer-citations a {
    display: inline-block;
    margin-left: 0.5rem;
    font-weight: 500;
}

/* 11. SCROLL REVEAL ANIMATIONS (Intersection Observer) */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 12. RESPONSIVE DESIGN BREAKPOINTS */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-visual {
        width: 100%;
    }
    
    .study-card-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .assessment-grid {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 1rem;
    }
    
    .main-nav {
        display: none; /* In a real app we'd trigger a drawer, but here we keep it clean. Nav CTA remains or header collapses */
    }
    
    .hero-section {
        padding: 120px 0 60px 0;
    }
    
    .study-card {
        padding: 2rem 1.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .form-card {
        padding: 2rem 1.5rem;
    }
    
    .main-footer {
        padding: 4rem 0 2rem 0;
    }
}