:root {
    --font-header: 'Bricolage Grotesque', sans-serif;
    --font-body: 'Poppins', sans-serif;
    --color-linkedin: #0077b5;
    --color-facebook: #1877f2;
    --color-youtube: #ff0000;
    --dark-blue-brand: #0a1120;
}

body {
    font-family: var(--font-body);
    background-color: #000000;
    color: #ffffff;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    font-weight: 300;
    padding-bottom: 60px;
}

h1, h2, h3, h4, .modern-header {
    font-family: var(--font-header);
    font-weight: 800;
}

.serif { font-family: var(--font-header); }

.hero-title-main {
    font-family: var(--font-header);
    line-height: 1.1;
    letter-spacing: -0.05em;
    font-weight: 300;
}

.hero-tagline {
    font-family: var(--font-body);
    letter-spacing: 0.3em;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 1.1rem;
    display: block;
    margin-bottom: 1.5rem;
}

/* --- METHODOLOGY STYLES --- */
.pillar-card {
    position: relative;
    overflow: hidden;
    background-color: #f9fafb;
    border: 1px solid #f1f5f9;
    transition: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
    height: 500px;
}

.pillar-card:hover {
    background-color: #ffffff;
    border-color: #3b82f6;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.08);
    transform: translateY(-8px);
}

.details-overlay {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.pillar-card:hover .details-overlay {
    opacity: 1;
    transform: translateY(0);
}

.pillar-card:hover .initial-view {
    opacity: 0;
    transform: scale(0.95);
}

.initial-view {
    transition: all 0.5s ease;
}

.roman-bg {
    position: absolute;
    top: -10px;
    right: 0px;
    font-size: 10rem;
    font-weight: 400;
    color: rgba(0, 0, 0, 0.03);
    pointer-events: none;
    line-height: 1;
    font-family: var(--font-header);
}

.accent-text { color: #2563eb; }
.highlight { font-weight: 600; color: #0f172a; }

/* --- GLOBAL UTILS --- */
* { font-style: normal !important; }

.section-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: #64748b;
    margin-bottom: 0.25rem;
    display: block;
    font-weight: 800;
    font-family: var(--font-header);
}

.btn-pill {
    border-radius: 9999px;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    letter-spacing: 0.1em;
    font-family: var(--font-header);
    font-weight: 700;
}

.btn-pill:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.3);
}

.cta-gradient {
    background: radial-gradient(circle at center, #111827 0%, #000000 100%);
    position: relative;
}

#sparkleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}

/* --- 3D BOOK ANIMATION ENGINE --- */
.book-viewport {
    perspective: 2500px;
    width: 100%;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    position: relative;
}

.book-3d {
    width: 320px;
    height: 480px;
    position: relative;
    transform-style: preserve-3d;
    transform: scale(1.2) rotateY(-15deg) rotateX(5deg);
    z-index: 20;
}

.book-face { position: absolute; backface-visibility: hidden; }

.book-front {
    width: 320px; height: 480px;
    background-image: url('https://res.cloudinary.com/dtwms0d2o/image/upload/v1773860125/Let_My_People_Lead_coverFONT_8-03-26_clamde.jpg');
    background-size: cover;
    background-position: center;
    transform: translateZ(20px);
    border-radius: 2px 5px 5px 2px;
    filter: brightness(1.1);
}

.book-back {
    width: 320px; height: 480px;
    background-image: url('https://res.cloudinary.com/dtwms0d2o/image/upload/v1773924604/%D7%A6%D7%99%D7%9C%D7%95%D7%9D_%D7%9E%D7%A1%D7%9A_2026-03-19_%D7%91-14.45.21_xnx6xz.png');
    background-size: cover;
    background-position: center;
    transform: rotateY(180deg) translateZ(20px);
    border-radius: 5px 2px 2px 5px;
}

.book-spine {
    width: 40px; height: 480px;
    background: #111b2d;
    left: 140px;
    transform: rotateY(-90deg) translateZ(160px);
    border-left: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.spine-text {
    color: rgba(255,255,255,0.4);
    font-size: 10px;
    font-weight: bold;
    transform: rotate(90deg);
    white-space: nowrap;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.book-top {
    width: 320px; height: 40px;
    background: #e5e7eb;
    top: 220px;
    transform: rotateX(90deg) translateZ(240px);
}

.book-bottom {
    width: 320px; height: 40px;
    background: #e5e7eb;
    top: 220px;
    transform: rotateX(-90deg) translateZ(240px);
    background: repeating-linear-gradient(to bottom, #f8f9fa 0px, #e9ecef 2px, #f8f9fa 4px);
}

.book-pages {
    width: 40px; height: 480px;
    background: #e5e7eb;
    left: 140px;
    transform: rotateY(90deg) translateZ(160px);
    background: repeating-linear-gradient(to right, #f8f9fa 0px, #e9ecef 2px, #f8f9fa 4px);
}

.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s ease-out;
}

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

/* --- ABOUT THE BOOK --- */
.about-heading { color: #0a1120; font-family: var(--font-header); font-weight: 300; line-height: 1.4; font-size: 2.75rem; }
.about-text { color: #334155; font-size: 1.25rem; line-height: 1.6; font-weight: 400; }
.sub-block-title { color: #3b82f6; font-size: 1.1rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.15em; margin-bottom: 1.5rem; font-family: var(--font-header); }
.sub-block-quote { color: #1e293b; font-size: 1.1rem; line-height: 1.7; font-weight: 400; }
.editorial-card { padding: 2.5rem; background: #ffffff; border: 1px solid #3b82f6; border-radius: 1.5rem; transition: all 0.4s ease; height: 100%; }
.editorial-card:hover { box-shadow: 0 15px 35px rgba(59, 130, 246, 0.1); transform: translateY(-5px); }

/* --- FEATURED QUOTE --- */
.quote-section { position: relative; background-color: #0a1428; overflow: hidden; padding: 10rem 0 14rem 0; display: flex; align-items: center; justify-content: center; }
.bars-side { position: absolute; bottom: 0; height: 100%; display: flex; align-items: flex-end; gap: 0; opacity: 0.35; z-index: 1; }
.bars-left { left: 0; }
.bars-right { right: 0; }
.bar-element { width: 55px; background-color: #3b82f6; border-right: 1px solid rgba(10, 20, 40, 0.4); }
.quote-ground-arc { position: absolute; bottom: 0; left: 0; width: 100%; height: 200px; background: linear-gradient(to top, #3b82f6 0%, #2563eb 100%); clip-path: ellipse(80% 100% at 50% 100%); z-index: 2; }

.quote-container-main { max-width: 950px; position: relative; z-index: 20; text-align: center; padding: 0 2rem; margin-bottom: 4rem; }
.quote-text-final { font-family: var(--font-body); font-size: 2rem; line-height: 1.75; color: #ffffff; font-weight: 300; display: inline; }
.quote-text-final strong { font-weight: 800; }
.attribution-final { margin-top: 5rem; }
.author-name-final { font-weight: 800; font-size: 1.5rem; letter-spacing: 0.05em; color: #ffffff; margin-bottom: 0.5rem; font-family: var(--font-header); }
.book-title-final { color: #3b82f6; font-weight: 700; font-size: 1.15rem; letter-spacing: 0.05em; font-family: var(--font-header); }

/* --- ABOUT THE AUTHOR --- */
.author-section { background-color: #ffffff; color: #0a1120; position: relative; }
.author-heading { font-family: var(--font-header); font-weight: 300; color: #0a1120; font-size: 3rem; line-height: 1.1; }
.author-tagline { font-family: var(--font-header); color: #3b82f6; font-weight: 800; text-transform: uppercase; letter-spacing: 0.15em; font-size: 0.85rem; display: block; margin-bottom: 2rem; border-bottom: 1px solid rgba(59, 130, 246, 0.2); padding-bottom: 1rem; display: inline-block; }
.author-bio p { font-size: 1.1rem; line-height: 1.8; color: #475569; margin-bottom: 1.5rem; font-weight: 300; }
.author-image-wrapper { position: relative; border-radius: 1rem; overflow: hidden; box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15); }
.author-image-wrapper::before { content: ''; position: absolute; inset: 0; border: 1px solid rgba(0,0,0,0.1); border-radius: 1rem; z-index: 10; }
.author-decoration-box { position: absolute; top: 2rem; left: -2rem; width: 100%; height: 100%; border: 2px solid #3b82f6; border-radius: 1rem; z-index: 0; opacity: 0.3; transition: all 0.5s ease; }
.author-image-group:hover .author-decoration-box { transform: translate(1rem, -1rem); opacity: 0.8; }

.author-img-effect { filter: grayscale(100%); transition: filter 0.6s ease; }
.author-image-group:hover .author-img-effect { filter: grayscale(0%); }

/* --- PURCHASE CTA --- */
.final-cta-section { position: relative; background-color: #060a12; overflow: hidden; }
.cta-glow { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 800px; height: 400px; background: rgba(59, 130, 246, 0.15); filter: blur(120px); border-radius: 50%; pointer-events: none; z-index: 0; }
.cta-book-wrapper { perspective: 1200px; max-width: 450px; margin: 0 auto; }
.cta-book-image { width: 100%; object-fit: contain; max-height: 500px; filter: drop-shadow(-15px 20px 25px rgba(0,0,0,0.5)); transition: transform 0.6s ease, filter 0.6s ease; }
.cta-book-wrapper:hover .cta-book-image { transform: translateY(-10px); filter: drop-shadow(-10px 30px 35px rgba(0,0,0,0.6)); }

/* --- BOOKS SHOWCASE --- */
.books-section { background-color: #f8fafc; color: #0f172a; position: relative; border-top: 1px solid rgba(0,0,0,0.05); }
.book-showcase-card { background: #ffffff; border-radius: 1.5rem; padding: 3.5rem 2.5rem; box-shadow: 0 10px 40px -10px rgba(0,0,0,0.05); border: 1px solid rgba(148, 163, 184, 0.1); transition: all 0.4s ease; display: flex; flex-direction: column; height: 100%; }
.book-showcase-card:hover { transform: translateY(-8px); box-shadow: 0 20px 40px -10px rgba(59, 130, 246, 0.15); border-color: rgba(59, 130, 246, 0.3); }
.book-cover-mockup { width: 100%; max-width: 250px; margin: 0 auto 2.5rem auto; transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1); filter: drop-shadow(0 15px 25px rgba(0,0,0,0.15)); }
.book-showcase-card:hover .book-cover-mockup { transform: scale(1.05) translateY(-5px); }
.current-book-badge { display: inline-block; background-color: rgba(59, 130, 246, 0.1); color: #2563eb; font-size: 0.7rem; font-weight: 800; text-transform: uppercase; padding: 0.3rem 0.8rem; border-radius: 99px; letter-spacing: 0.05em; margin-left: 0.75rem; vertical-align: middle; transform: translateY(-3px); font-family: var(--font-header); }

/* --- SOCIAL LINKS --- */
.social-link {
    width: 4.5rem;
    height: 4.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    background: #ffffff;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    position: relative;
}

.social-link.linkedin { color: #0077b5; }
.social-link.facebook { color: #1877f2; }
.social-link.youtube { color: #ff0000; }

.social-link:hover {
    transform: translateY(-8px) scale(1.1);
    background-color: #f8fafc;
    box-shadow: 0 15px 30px rgba(0,0,0,0.25);
}

.footer-logo { font-size: 2.5rem; font-weight: 300; letter-spacing: -0.04em; color: #ffffff; font-family: var(--font-header); }