:root {
    --color-bg: #050a14;
    /* Deep Navy */
    --color-bg-secondary: #0a1428;
    /* Royal/Navy mix */
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0c4de;
    /* Light Steel Blue */
    --color-accent: #2196f3;
    /* Bright Blue (Material Blue 500) replaces Gold */
    --color-accent-hover: #1976d2;
    /* Darker Blue */
    --color-border: #1e3a5f;
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --spacing-container: 1200px;
    --transition-speed: 0.3s;
}

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

body {
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

ul {
    list-style: none;
}

/* Typography */
h1,
h2,
h3,
h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

.text-center {
    text-align: center;
}

.mt-4 {
    margin-top: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    font-family: var(--font-body);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-speed);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.4);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.8rem;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
}

.btn-sm:hover {
    background-color: var(--color-accent);
    color: #ffffff;
}

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

.btn-large {
    padding: 18px 40px;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 1.5px;
}

/* Layout Utilities */
.container {
    max-width: var(--spacing-container);
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

/* Header */
.sticky-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    background-color: transparent;
    transition: background-color var(--transition-speed), padding var(--transition-speed);
}

.sticky-header.scrolled {
    background-color: rgba(5, 10, 20, 0.95);
    padding: 15px 0;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.nav-link:hover {
    color: var(--color-accent);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    padding-top: 140px;
    padding-bottom: 60px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    /* Layered Blue Gradient */
    background: linear-gradient(135deg, #02050a 0%, #050a14 50%, #0a1428 100%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-headline {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.hero-headline .highlight {
    color: var(--color-accent);
    display: block;
}

.hero-subheadline {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    margin-bottom: 30px;
    max-width: 500px;
}

.credential-badge {
    display: inline-block;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-accent);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 5px;
    margin-bottom: 30px;
}

.hero-image-wrapper {
    position: relative;
}

.hero-image {
    width: 100%;
    max-width: 450px;
    /* Constrain width */
    height: auto;
    border-radius: 4px;
    filter: grayscale(20%);
    transition: filter var(--transition-speed);
    display: block;
    margin: 0 auto;
    /* Center in its column if smaller */
}

.hero-image:hover {
    filter: grayscale(0%);
}

.secondary-line {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 10px;
    font-style: italic;
}

/* Transformation Section */
.transformation-section {
    background-color: var(--color-bg-secondary);
}

.transformation-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.section-headline {
    font-size: 2.5rem;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.section-headline::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
}

.section-description {
    color: var(--color-text-secondary);
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.outcomes-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.check-icon {
    color: var(--color-accent);
    font-weight: bold;
}

.proof-line {
    margin-top: 30px;
    padding-left: 20px;
    border-left: 2px solid var(--color-accent);
    font-style: italic;
    color: var(--color-text-secondary);
}

/* Keynotes Section */
.keynotes-section {
    background-color: var(--color-bg);
}

.section-header {
    margin-bottom: 60px;
}

.intro-line {
    color: var(--color-text-secondary);
    margin-top: 20px;
}

.keynotes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.keynote-card {
    background-color: var(--color-bg-secondary);
    padding: 40px 30px;
    border: 1px solid var(--color-border);
    transition: transform var(--transition-speed), border-color var(--transition-speed);
    position: relative;
}

.keynote-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
}

.card-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.05);
    position: absolute;
    top: 20px;
    right: 30px;
    font-weight: 700;
}

.keynote-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--color-text-primary);
}

.keynote-desc {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* Audiences Section */
.audiences-section {
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: 60px 0;
}

.audiences-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

.audience-tag {
    padding: 10px 25px;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Books Section */
.books-section {
    background: linear-gradient(to bottom, #050a14, #02050a);
}

.books-showcase {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    margin-top: 50px;
}

.book-card {
    width: 220px;
    /* Slightly larger fixed width */
    height: 320px;
    /* Fixed height for uniformity */
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-speed);
}

/* Removed .book-card.featured scaling styles */

.book-card:hover {
    transform: translateY(-10px);
    /* consistent hover effect */
}

.book-cover {
    width: 100%;
    height: 100%;
    object-fit: contain;
    /* Ensures entire cover is visible without cropping */
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border-radius: 2px;
}

.optional-line {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-style: italic;
}

/* Video Section */
.video-section {
    background-color: var(--color-bg);
    overflow: hidden;
}

.video-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.video-placeholder-container {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    /* 16:9 Aspect Ratio */
    background-color: #000;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
}

.video-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    transition: opacity var(--transition-speed);
}

.video-placeholder-container:hover .video-bg {
    opacity: 0.8;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-accent);
    z-index: 2;
    transition: transform var(--transition-speed);
}

.video-placeholder-container:hover .play-button {
    transform: translate(-50%, -50%) scale(1.1);
}

/* Booking Form */
.booking-section {
    background-color: var(--color-bg-secondary);
    padding: 100px 0;
}

.form-card {
    background-color: var(--color-bg);
    padding: 60px;
    border-radius: 8px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-border);
    max-width: 900px;
    margin: 0 auto;
}

.booking-form {
    margin-top: 40px;
}

.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.full-width {
    width: 100%;
}

label {
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

input,
select,
textarea {
    padding: 12px 15px;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    border-radius: 4px;
    transition: border-color var(--transition-speed);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.microcopy {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 15px;
}

/* Footer */
.footer {
    padding: 60px 0 40px;
    background-color: #02050a;
    /* Darkest Navy */
    border-top: 1px solid var(--color-border);
}

.footer-name {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.footer-divider {
    width: 50px;
    height: 1px;
    background-color: var(--color-accent);
    margin: 0 auto 20px;
}

.footer-title {
    color: var(--color-text-secondary);
    margin-bottom: 15px;
}

.footer-links {
    margin-bottom: 15px;
}

.footer-links a {
    color: var(--color-text-primary);
    font-weight: 500;
}

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

.separator {
    margin: 0 10px;
    color: var(--color-border);
}

.footer-note {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* Responsive */
@media (max-width: 992px) {
    .hero-headline {
        font-size: 2.8rem;
    }

    .hero-grid,
    .transformation-grid,
    .video-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-image-wrapper {
        order: -1;
    }

    /* Image on top on mobile/tablet */
    .books-showcase {
        flex-wrap: wrap;
    }

    .book-card.featured {
        transform: scale(1);
    }

    .nav-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
        width: 30px;
        height: 20px;
        position: relative;
    }

    .mobile-menu-toggle .bar {
        display: block;
        width: 100%;
        height: 2px;
        background-color: var(--color-text-primary);
        position: absolute;
        transition: 0.3s;
    }

    .mobile-menu-toggle .bar:nth-child(1) {
        top: 0;
    }

    .mobile-menu-toggle .bar:nth-child(2) {
        top: 9px;
    }

    .mobile-menu-toggle .bar:nth-child(3) {
        bottom: 0;
    }
}

@media (max-width: 768px) {
    .section-headline {
        font-size: 2rem;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .form-group {
        margin-bottom: 20px;
    }

    .form-card {
        padding: 30px 20px;
    }

    .hero-section {
        padding-top: 120px;
        text-align: center;
    }

    .credential-badge {
        margin: 0 auto 30px;
    }

    .hero-headline {
        font-size: 2.2rem;
    }
}