/* ===== Import Fonts ===== */
@import url('https://fonts.googleapis.com/css2?family=Merriweather:wght@300;400;700&family=Playfair+Display:wght@500;700&display=swap');

/* ===== Global ===== */
* {
  box-sizing: border-box;
  scroll-behavior: smooth;
}

html, body {
  height: 100%;
  margin: 0;
  font-family: "Merriweather", "Georgia", serif;
  color: #1c2e2d;
  background: #ffffff;
  line-height: 1.8;   
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  height: 80px;
  background: #000; /* solid black */
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
  z-index: 1000;
}

/* overlay behind header content */
.site-header::after {
  content: '';
  position: absolute;
  top:0; left:0;
  width:100%; height:100%;
  background: rgba(9,9,9,0.274);
  pointer-events: none; /* important: clicks pass through */
  z-index: 0;
}

/* header content container */
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  position: relative;
  z-index: 10; /* ensure it's above overlay */
}

/* Logo */
.logo {
  font-family: "Playfair Display", serif;
  font-size: 2rem;
  color: #fff;
  margin: 0;
  letter-spacing: 0.5px;
}

/* Nav */
.nav {
  display: flex;
  gap: 1.5rem;
  z-index: 10; /* above overlay */
}

.nav a {
  text-decoration: none;
  font-weight: 600;
  color: #e4f2ec;
  position: relative;
  transition: all 0.3s ease;
}

.nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  left: 0;
  bottom: -4px;
  background: #b6d226;
  transition: width 0.3s;
}

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

.nav a:hover,
.nav a.active {
  color: #fbbc0e;
  text-shadow: 0 0 6px #4ec292,0 0 12px #028e8c;
}

/* Hamburger button */
.menu-toggle {
  display: none; /* hidden on desktop */
  background: none;
  border: none;
  font-size: 2.5rem;
  color: #e4f2ec;
  cursor: pointer;
  position: relative;
  z-index: 20; /* above overlay & nav */
}

/* ===== RESPONSIVE MOBILE ===== */
@media (max-width: 768px) {
  /* show hamburger */
  .menu-toggle {
    display: block;
  }

  /* hide nav by default */
  .nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    right: 0;
    width: 100%;
    background: #303332;
    padding: 1rem 0;
    z-index: 15; /* below hamburger but above overlay */
  }

  /* show nav when toggled */
  .nav.show {
    display: flex;
  }

  .nav a {
    margin: 1rem 0;
    text-align: center;
  }
}

/* ===== HERO WITH VIDEO ===== */
.hero-video {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  overflow: hidden;
}

.hero-video .hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%; 
  object-fit: cover;
  filter: brightness(0.5);
}

.hero-video .hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-video .hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  max-width: 1200px;
  padding: 2rem;
  gap: 4rem;
}

.hero-video .hero-text {
  flex: 1 1 500px;
}

.hero-video .hero-text h2 {
  font-family: "Playfair Display", serif;
  font-size: 2.6rem;
  color: #fff;
  margin-bottom: 1.5rem;
  margin-top: 5rem;
}



.hero-video .hero-text p {
  max-width: 600px;
  font-size: 1.15rem;
  color: #e6f7f1;
  margin-bottom: 1rem;
}

.hero-video .btn {
  display: inline-block;
  background: #1e6cb4;
  color: #fff;
  padding: 0.8rem 1.8rem;
  border-radius: 4px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.3s ease;
}

.hero-video .btn:hover {
  background: #01aa94;
}

#bookCover {
  perspective: 1500px;
  cursor: pointer;
  width: 300px;
  height: 450px;
  margin: 2rem auto;
  position: relative;
}

#bookCover::after {
  content: "";
  position: absolute;
  bottom: 15px;
  left: 50%;
  transform: translateX(-50%);
  width: 180px;
  height: 40px;
  background: rgba(0, 0, 0, 0.25);
  filter: blur(15px);
  border-radius: 50%;
  opacity: 0.6;
  pointer-events: none;
  animation: shadowPulse 3s ease-in-out infinite;
}

@keyframes shadowPulse {
  0%, 100% {
    opacity: 0.5;
    width: 180px;
  }
  50% {
    opacity: 0.7;
    width: 200px;
  }
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  will-change: transform;
  box-shadow: 0 20px 35px rgba(0,0,0,0.25); /* add subtle depth shadow */
  border-radius: 10px;
  background: white;
}

.flip-card-front,
.flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.flip-card-front img,
.flip-card-back img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  user-select: none;
  pointer-events: none;
}

.flip-card-back {
  transform: rotateY(180deg);
}

.hero-about-video {
  position: relative;
  height: 100vh;
  overflow: hidden;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-about-video .hero-bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.5);
  z-index: 0;
}

.hero-about-video .hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-about-video .hero-text span {
  border-bottom: 3px solid #1e6cb4;
}

.hero-about-video .hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  padding: 2rem;
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
}

.hero-about-video .hero-text {
  flex: 1 1 300px;
}

.hero-about-video .hero-text h2 {
  font-size: 1.0rem;
  margin-bottom: 1rem;
}

.hero-about-video .hero-text .lead {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
}

.hero-about-video .hero-text .kicker {
  font-style: italic;
  margin-bottom: 2rem;
}

.hero-about-video .btn {
  background-color: #2f4e91;
  color: white;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  text-decoration: none;
  font-weight: bold;
}

.hero-about-video .btn:hover {
  background: #01aa94;
}

.hero-about-video .hero-image {
  flex: 1 1 300px;
  max-width: 300px;
}

.hero-about-video .hero-image img {
  width: 100%;
  border-radius: 6px;
  display: block;
}

/* ✅ FIX: Make the book image visible and centered on mobile */
@media (max-width: 768px) {
  .hero-about-video {
    height: auto;
    padding: 3rem 1.5rem;
  }

  .hero-about-video .hero-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 2rem;
  }

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

  .hero-about-video .hero-text .lead {
    font-size: 1.1rem;
  }

  .hero-about-video .hero-image {
    max-width: 250px;
    width: 100%;
  }

  .hero-about-video .hero-image img {
    width: 100%;
    height: 200px;
    margin-top: -100px;
  }
}


/* ✅ MOBILE FIX: keep book visible & properly spaced */
@media (max-width: 768px) {
  .hero-video {
    height: auto; /* allow full height for all content */
    padding-bottom: 2rem;
  }

  .hero-video .hero-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 2rem;
    padding-bottom: 0; /* remove excess padding */
  }

  .hero-video .hero-text {
    flex: 1 1 auto;
    margin-bottom: 1.5rem;
  }

  #bookCover {
    position: relative; /* ✅ stays visible */
    bottom: auto;
    width: 220px;
    height: auto;
    margin-top: 1rem;
    margin-bottom: 2rem;
  }

  #bookCover::after {
    bottom: 10px;
  }
}

/* ===== Book Section ===== */
.book-fullwidth {
  background: #ffffff;
  padding: 2rem 1rem;
  border-top: 1px solid #eaeaea;
}

.book-wrapper {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 3rem;
  flex-wrap: wrap;
  max-width: 1200px;
  margin: 0 auto;
}

.book-info {
  flex: 1 1 500px;
}

.book-info h2 {
  font-family: "Playfair Display", serif;
  font-size: 2.2rem;
  color: #0d3b2e;
  margin-bottom: 1rem;
}

.book-info p {
  font-size: 1.1rem;
  color: #2b3e3c;
  line-height: 1.85;
}

.book-info blockquote {
  font-style: italic;
  border-left: 4px solid #004779;
  background: #f4f8f6;
  padding: 1rem 1.2rem;
  margin: 1.5rem 0;
  border-radius: 4px;
}

.book-images {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.book-images img {
  width: 240px;
  border-radius: 6px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s;
}

.book-images img:hover {
  transform: scale(1.05);
}

/* ===== Press Section ===== */
.press-section {
  background: #0d3b2e;
  color: #eaf9f2;
  padding: 1rem 2rem;
}

.press-container {
  max-width: 1200px;
  margin: 0 auto;
}

.press-container h2 {
  text-align: center;
  font-family: "Playfair Display", serif;
  font-size: 2.6rem;
  margin-bottom: 3rem;
}

.press-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
}

.press-img {
  width: 420px;
  border-radius: 8px;
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.25);
}

.press-text {
  flex: 1 1 500px;
}

.press-text h3 {
  font-family: "Playfair Display", serif;
  font-size: 1.6rem;
  color: #a0e6c5;
  margin-top: 0;
}

.press-text p {
  color: #f4faf7;
  font-size: 1.05rem;
  line-height: 1.8;
}

/* ===== Author Section ===== */
.author-intro {
  background: #f9fbfa;
  padding: 8rem 2rem;
}

/* Split wrapper (each section has its own box) */
.split {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 3rem;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 2.5rem;
  margin-bottom: 3rem;
  box-shadow: 0 4px 12px rgba(1, 99, 55, 0.759);
  position: relative;
  overflow: hidden;
}

/* Optional: Add a math-symbol decorative element (very subtle) */
.split::before {
  content: "∑";
  position: absolute;
  font-size: 6rem;
  font-family: "Georgia", serif;
  color: rgba(59, 130, 246, 0.05); /* Light blue, transparent */
  top: 10px;
  right: 20px;
  pointer-events: none;
  user-select: none;
}

.split.reverse {
  flex-direction: row-reverse;
}

.split .text {
  flex: 1 1 500px;
}

.split .text h2,
.split .text h3 {
  font-family: "Playfair Display", serif;
  font-size: 1.9rem;
  color: #0d3b2e;
  margin-bottom: 1rem;
  position: relative;
}

.split .text h2::after,
.split .text h3::after {
  content: "";
  display: block;
  width: 50px;
  height: 3px;
  background-color: #2563eb; /* math blue */
  margin-top: 8px;
  border-radius: 2px;
}

.split .text p {
  font-size: 1.1rem;
  color: #2a3837;
  line-height: 1.7;
}



/* Image Section */
.split .image {
  width: 360px;
  max-width: 40%;
  flex: 1 1 360px;
}

.split .image img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  object-fit: cover;
}

/* Responsive */
@media (max-width: 768px) {
  .split {
    flex-direction: column;
    text-align: center;
  }

  .split.reverse {
    flex-direction: column;
  }

  .split .text {
    text-align: left;
  }

  .split .image {
    max-width: 100%;
  }
}

/* ===== Footer ===== */
footer {
  background: #0b2f23;
  color: #ffffff;
  text-align: center;
  padding: 2rem;
  font-size: 0.95rem;
}

/* ===== Animation ===== */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  animation: fadeUp 1.2s ease-out forwards;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-inner,
  .press-grid,
  .split,
  .split.reverse {
    flex-direction: column;
    text-align: center;
  }

  .hero-image img,
  .press-img {
    width: 100%;
    max-width: 360px;
  }

  .split .image {
    max-width: 100%;
  }
}

/* --- Quote Band --- */
/* --- Quote Band (softer sage tone) --- */
.quote-band {
  background: #dbe6dc; /* soft desaturated sage */
  color: #1a3321;
  text-align: center;
  padding: 5rem 2rem;
}
.quote-band blockquote {
  font-family: "Playfair Display", serif;
  font-size: 1.9rem;
  font-style: italic;
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.8;
}

/* --- Bio Section Enhancements --- */
.bio-fullwidth {
  background: #f9faf9;
  padding: 6rem 2rem;
}
.section-title {
  text-align: center;
  font-family: "Playfair Display", serif;
  font-size: 2.4rem;
  margin-bottom: 3rem;
  color: #535b19;
}
.bio-container {
  max-width: 1100px;
  margin: 0 auto;
}
.bio-block {
  background: #ffffff;
  border-radius: 12px;
  padding: 2.5rem;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
  margin-bottom: 3rem;
}
.bio-block.alt {
  background: #f2f6f3;
}
.bio-divider {
  height: 1px;
  background: #e4ebe5;
  margin: 3rem auto;
  width: 80%;
}


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

.bio-card {
  background: #ffffff;
  border-radius: 10px;
  padding: 2rem;
  box-shadow: 0 5px 15px rgba(0,0,0,0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.bio-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 130, 76, 0.793);
}

.bio-card h3 {
  color: #0d3b2e;
  font-family: "Playfair Display", serif;
  margin-top: 0;
}

.bio-card p, .bio-card ul, .bio-card blockquote {
  font-size: 1rem;
  color: #0c0c0c;
  line-height: 1.7;
}

.bio-card blockquote {  
  border-left: 4px solid #1e6cb4;
  padding-left: 1rem;
  font-style: italic;
  color: #5b5b19;
}
.bio-full {
  max-width: 900px;
  margin: 2rem auto;
  padding: 2rem;
  background: #f9fafb;
  border-left: 5px solid #2c5541;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(16, 142, 87, 0.933);
}

.bio-full h3 {
  color: #1b4332;
  margin-bottom: 1rem;
}

.bio-full blockquote {
  font-style: italic;
  border-left: 4px solid #3b82f6;
  padding-left: 1rem;
  color: #333;
}
.bio-highlight {
  text-align: center;
  max-width: 800px;
  margin: 3rem auto;
  padding: 2.5rem;
  border-radius: 16px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  background: linear-gradient(145deg, #f9fafb, #ffffff);
}

.bio-highlight h3 {
  font-size: 1.6rem;
  color: #1e3a8a;
  margin-bottom: 1rem;
}

.bio-highlight p {
  font-size: 1.1rem;
  color: #374151;
}
.bio-card.bio-review {
  background: linear-gradient(270deg, #d1fae5, #f3f4f6, #dbeafe);
  background-size: 300% 300%;
  animation: softGradientFlow 15s ease infinite;
  border-radius: 12px;
  padding: 24px 28px;
  max-width: 1000px;
  margin: 40px auto;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
  font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  position: relative;
  overflow: hidden;
  color: #1f2937;
}

/* Animation for the background */
@keyframes softGradientFlow {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.bio-card.bio-review h3 {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 18px;
  color: #1e293b;
  border-bottom: 1px solid #cbd5e1;
  padding-bottom: 6px;
}

.bio-card.bio-review ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.bio-card.bio-review li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 14px;
  font-size: 1.05rem;
  line-height: 1.6;
  color: #374151;
}

.bio-card.bio-review li::before {
  content: "★";
  position: absolute;
  left: 0;
  top: 2px;
  color: #facc15; /* soft golden star */
  font-size: 1rem;
}

.bio-card.bio-review li strong {
  font-weight: 600;
  color: #111827;
}

.bio-card.bio-review li em {
  font-style: italic;
  color: #2563eb; /* calm blue accent */
}


/* Unique Color Themes */
.bio-highlight.working {
  background: linear-gradient(145deg, #eef2ff, #ffffff);
  border-left: 5px solid #6366f1; /* Indigo accent */
}

.bio-highlight.project {
  background: linear-gradient(145deg, #ecfdf5, #ffffff);
  border-left: 5px solid #059669; /* Green accent */
}

.bio-highlight.books {
  background: linear-gradient(145deg, #7ec5ae, #ffffff);
  border-left: 5px solid #6ba78a; /* Yellow accent */
}

/* ====================== ABOUT / HIGHLIGHT REVIEWS ====================== */
.highlight-reviews {
  margin: 3rem auto;
  width: 95%;          /* occupy almost full screen width */
  max-width: 1200px;   /* limits width on very large screens */
  background: linear-gradient(145deg, #ffffff, #e6f7ff);
  border-left: 6px solid #085b33;
  padding: 3rem 4rem;  /* generous padding for a rectangular feel */
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.15);
  animation: fadeIn 0.9s ease forwards;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: 2rem;          /* spacing between questions */
}

/* Hover effect */
.highlight-reviews:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.18);
}

/* Section title inside highlight */
.highlight-reviews h3 {
  font-size: 2rem;
  font-weight: 800;
  color: #014f66;
  letter-spacing: 0.7px;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid #0e6736;
  display: inline-block;
  padding-bottom: 6px;
}

/* Strong text inside paragraphs (questions) */
.highlight-reviews p strong {
  display: block;
  font-size: 1.2rem;
  font-weight: 700;
  color: #05502e;
  margin-bottom: 0.7rem;
  letter-spacing: 0.3px;
}

/* Paragraph answers */
.highlight-reviews p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #243338;
  letter-spacing: 0.25px;
  margin-bottom: 1.8rem;
}

/* Remove extra bottom margin on last paragraph */
.highlight-reviews p:last-child {
  margin-bottom: 0;
}

/* Fade animation */
@keyframes fadeIn {
  from {opacity:0; transform: translateY(20px);}
  to {opacity:1; transform: translateY(0);}
}

/* ====================== RESPONSIVE ====================== */
@media(max-width:1024px){
  .highlight-reviews {
    padding: 2.5rem 3rem;
    width: 90%;
  }
}

@media(max-width:768px){
  .highlight-reviews {
    padding: 2rem 2rem;
    width: 95%;
  }

  .highlight-reviews h3 {
    font-size: 1.7rem;
  }

  .highlight-reviews p strong {
    font-size: 1.1rem;
  }

  .highlight-reviews p {
    font-size: 1rem;
  }
}
/* ====================== VIDEO SECTION ====================== */
/* ====================== SECTION ====================== */
.video-section {
  width: 100%;
  min-height: 100vh;
  background: linear-gradient(135deg, #f3f9ff, #eaf1ff);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

/* ====================== CONTAINER ====================== */
.video-container {
  width: 95%;
  max-width: 1100px;
  background: #ffffff;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.18);
  display: flex;
  flex-direction: column;
}

/* ====================== IMAGE ====================== */
.image-wrapper {
  width: 100%;
  background: #fff;
}

.image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
}


/* ====================== TEXT AREA ====================== */
.preview-text {
  padding: 3rem 2rem;
  text-align: center;
}

.preview-text h2 {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  color: #1f2937;
}

.preview-text p {
  font-size: 1.1rem;
  color: #4b5563;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ====================== BUTTON ====================== */
.preview-button {
  display: inline-block;
  padding: 16px 36px;
  font-size: 1.1rem;
  font-weight: 600;
  color: #ffffff;
  background: linear-gradient(135deg, #2563eb, #1e40af);
  border-radius: 50px;
  text-decoration: none;
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.4);
  transition: all 0.3s ease;
}

.preview-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 35px rgba(37, 99, 235, 0.5);
  background: linear-gradient(135deg, #1e40af, #1e3a8a);
}

/* ====================== RESPONSIVE ====================== */
@media (max-width: 768px) {
  .image-wrapper {
    height: 40vh;
  }

  .preview-text h2 {
    font-size: 1.6rem;
  }

  .preview-text p {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .image-wrapper {
    height: 30vh;
  }

  .preview-button {
    width: 100%;
    padding: 16px;
  }
}