:root{
  --color-bg: #b8c9d9;
  --color-dark: #1e2a3a;
  --color-navy: #ece8e8;
  --color-text: #2c3e50;
  --color-text-light: #ece8e8;
  --color-btn-bg: #1e2d45;
  --color-btn-hover: #2e4060;
  --color-white: #ffffff;
  --color-overlay: rgba(255, 255, 255, 0.15);

  --font-title: 'Cinzel Decorative', serif;
  --font-body: 'Lora', serif;

  --transition-base: 0.3s ease;
  --shadow-book: 0 8px 40px rgba(30, 42, 58, 0.55), 0 2px 12px rgba(30, 42, 58, 0.3);
  --shadow-btn: 0 4px 16px rgba(30, 45, 69, 0.4);

}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  min-height: 100vh;
  overflow-x: hidden;
}

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: url('../images/fond.png');
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
  overflow: hidden;


  &::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 180px;
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.6));
    pointer-events: none;
  }
}

.social-nav {
  position: absolute;
  top: 28px;
  right: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 10;

  a {
    color: var(--color-navy);
    opacity: 0.75;
    transition: opacity var(--transition-base), transform var(--transition-base);
    display: flex;

    &:hover {
      opacity: 1;
      color: var(--color-dark);
      transform: scale(1.15);
    }

    svg {
      width: 22px;
      height: 22px;
      fill: currentColor;
    }
  }
}

.site-header {
  text-align: center;
  padding: 36px 20px 0;
  position: relative;
  z-index: 5;

  .site-title {
    font-family: var(--font-title);
    font-size: clamp(1.6rem, 4vw, 2.6rem);
    letter-spacing: 0.12em;
    color: var(--color-navy);
    text-shadow: var(--shadow-book);
    font-weight: 400;
    line-height: 1.1;

    span{
      text-transform: uppercase;
    }
  }

  .site-subtitle {
    font-family: var(--font-body);
    font-size: clamp(0.75rem, 1.5vw, 0.95rem);
    color: var(--color-text-light);
    letter-spacing: 0.2em;
    margin-top: 6px;
    font-style: italic;
  }
}

.hero-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 48px 80px;
  gap: 64px;
  position: relative;
  z-index: 5;

  @media (max-width: 768px) {
    flex-direction: column;
    gap: 40px;
    padding: 32px 24px 80px;
    text-align: center;
  }
}

.book-cover-wrapper {
  flex-shrink: 0;

  img.book-cover {
    display: block;
    width: clamp(180px, 22vw, 280px);
    border-radius: 3px;
    box-shadow: var(--shadow-book);
    transition: transform 0.4s ease, box-shadow 0.4s ease;

    &:hover {
      transform: translateY(-6px) rotate(1deg);
      box-shadow: 0 18px 60px rgba(30, 42, 58, 0.65), 0 4px 16px rgba(30, 42, 58, 0.35);
    }

    @media (max-width: 768px) {
      width: clamp(160px, 50vw, 230px);
    }
  }
}

.book-info {
  max-width: 440px;
  text-align: center;

  .book-taglines {
    font-family: var(--font-body);
    font-size: clamp(0.9rem, 1.5vw, 1.05rem);
    line-height: 2;
    color: var(--color-dark);

    p { 
      margin: 0; 
    }
  }

  .book-question {
    font-family: var(--font-body);
    font-size: clamp(0.95rem, 1.6vw, 1.15rem);
    color: var(--color-dark);
    font-weight: 600;
    margin-top: 20px;
    line-height: 1.5;
  }

  .btn-summary {
    display: inline-block;
    margin-top: 32px;
    padding: 14px 32px;
    background: var(--color-btn-bg);
    color: var(--color-white);
    font-family: var(--font-body);
    font-size: clamp(0.65rem, 1.2vw, 0.78rem);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    text-decoration: none;
    border: 2px solid var(--color-btn-bg);
    cursor: pointer;
    transition: background-color var(--transition-base), color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
    box-shadow: var(--shadow-btn);
    width: 100%;
    max-width: 280px;
    text-align: center;

    &:hover {
      background-color: transparent;
      color: var(--color-dark);
      font-weight: bold;
      box-shadow: 0 6px 24px rgba(30, 45, 69, 0.25);
      transform: translateY(-2px);
    }

    &:active {
      transform: translateY(0);
    }
  }
  .btn-soon {
    margin-top: 12px;
    opacity: 0.5;
    cursor: not-allowed;
  }

  .btn-soon:hover {
    background: #1e2d45;
    color: #ffffff;
    transform: none;
    box-shadow: 0 4px 16px rgba(30, 45, 69, 0.4);
  }
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 30, 45, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;

  &.is-open {
    opacity: 1;
    visibility: visible;

    .modal-box {
      transform: translateY(0) scale(1);
      opacity: 1;
    }
  }
}

.modal-box {
  background: rgba(240, 246, 252, 0.97);
  border: 1px solid rgba(30, 45, 69, 0.12);
  border-radius: 4px;
  max-width: 620px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 48px 48px 40px;
  position: relative;
  box-shadow: 0 24px 80px rgba(20, 30, 45, 0.5);
  transform: translateY(24px) scale(0.97);
  opacity: 0;
  transition: transform 0.35s ease, opacity 0.35s ease;

  @media (max-width: 600px) {
    padding: 36px 24px 32px;
  }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.6rem;
  color: var(--color-text);
  line-height: 1;
  padding: 4px 8px;
  transition: color var(--transition-base), transform var(--transition-base);

  &:hover {
    color: var(--color-dark);
    transform: rotate(90deg);
  }
}

.modal-title {
  font-family: var(--font-title);
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: var(--color-dark);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.modal-series {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-text);
  letter-spacing: 0.15em;
  margin-bottom: 28px;
  font-style: italic;
}

.modal-divider {
  width: 48px;
  height: 2px;
  background: var(--color-dark);
  margin-bottom: 28px;
  opacity: 0.3;
}

.modal-body {
  font-family: var(--font-body);
  font-size: clamp(0.88rem, 1.4vw, 0.98rem);
  line-height: 1.85;
  color: var(--color-text);
  text-align: justify;

  p + p {
    margin-top: 16px;
  }
}