/* ==========================================================================
   Olayiwola Kola-Seriki — Author Platform Styles
   Aesthetic: Editorial Literary Serif, Warm Paper, Refined Terracotta Accents
   ========================================================================== */

:root {
  --bg-canvas: #FAF8F5;
  --bg-surface: #F3EFEA;
  --bg-card: #FFFFFF;
  --bg-elevated: #EDE7DF;

  --text-primary: #1C1917;
  --text-secondary: #57524D;
  --text-muted: #79716B;

  --accent-terracotta: #A04A2C;
  --accent-terracotta-hover: #863B20;
  --accent-terracotta-light: #F7EDE8;

  --accent-forest: #2A483E;
  --accent-forest-light: #EBF1EE;

  --border-subtle: #E7E1D8;
  --border-medium: #D5CCC0;

  --font-serif: 'Newsreader', 'Playfair Display', Georgia, Cambria, 'Times New Roman', serif;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-serif);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1140px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  width: 100%;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Typography Helpers */
.font-sans {
  font-family: var(--font-sans);
}

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

.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
  color: var(--accent-terracotta);
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.25;
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  line-height: 1.75;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(250, 248, 245, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.25rem 0;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.brand-tagline {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-item {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-item:hover,
.nav-item.active {
  color: var(--accent-terracotta);
}

.nav-badge {
  font-size: 0.7rem;
  background-color: var(--accent-terracotta-light);
  color: var(--accent-terracotta);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  margin-left: 0.35rem;
  font-weight: 600;
  vertical-align: middle;
}

.btn-header {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.55rem 1.2rem;
  border-radius: 6px;
  background-color: var(--text-primary);
  color: var(--bg-canvas);
  transition: all 0.2s ease;
}

.btn-header:hover {
  background-color: var(--accent-terracotta);
  color: #fff;
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-toggle svg {
  width: 24px;
  height: 24px;
  stroke: var(--text-primary);
}

/* Mobile Nav Overlay */
.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 1.5rem;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-subtle);
  gap: 1.25rem;
}

.mobile-nav.open {
  display: flex;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.85rem 1.75rem;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.btn-primary:hover {
  background-color: var(--accent-terracotta-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.btn-secondary:hover {
  border-color: var(--accent-terracotta);
  color: var(--accent-terracotta);
  background-color: var(--bg-surface);
}

.btn-dark {
  background-color: var(--text-primary);
  color: var(--bg-canvas);
}

.btn-dark:hover {
  background-color: #000;
  transform: translateY(-1px);
}

/* Cards */
.editorial-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 2.25rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.editorial-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -8px rgba(28, 25, 23, 0.06);
}

/* Book Cover Display */
.book-cover-container {
  perspective: 1200px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.book-cover-real {
  position: relative;
  display: inline-block;
  perspective: 1200px;
}

.book-cover-image {
  width: 100%;
  max-width: 320px;
  height: auto;
  border-radius: 4px 10px 10px 4px;
  box-shadow: 
    -8px 0 16px rgba(0, 0, 0, 0.18),
    16px 20px 40px rgba(0, 0, 0, 0.28),
    0 2px 8px rgba(0, 0, 0, 0.12);
  transform: rotateY(-6deg) rotateX(1.5deg);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
  display: block;
}

.book-cover-image:hover {
  transform: rotateY(-1deg) rotateX(0deg) scale(1.025);
  box-shadow: 
    -4px 0 14px rgba(0, 0, 0, 0.15),
    22px 28px 48px rgba(0, 0, 0, 0.32);
}

/* Newsletter Section */
.newsletter-box {
  background: linear-gradient(135deg, var(--bg-surface) 0%, #EFE8DF 100%);
  border: 1px solid var(--border-medium);
  border-radius: 12px;
  padding: 3.5rem 2.5rem;
  text-align: center;
}

.newsletter-form {
  display: flex;
  gap: 0.75rem;
  max-width: 520px;
  margin: 1.75rem auto 0;
}

.newsletter-input {
  flex: 1;
  padding: 0.85rem 1.25rem;
  border-radius: 6px;
  border: 1px solid var(--border-medium);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  background-color: #fff;
  color: var(--text-primary);
  outline: none;
}

.newsletter-input:focus {
  border-color: var(--accent-terracotta);
  box-shadow: 0 0 0 3px var(--accent-terracotta-light);
}

/* Modal Excerpt Reader */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background-color: rgba(28, 25, 23, 0.7);
  backdrop-filter: blur(6px);
  padding: 1.5rem;
  overflow-y: auto;
  align-items: center;
  justify-content: center;
}

.modal-overlay.open {
  display: flex;
}

.modal-content {
  background-color: #FAF8F5;
  max-width: 780px;
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border-medium);
  padding: 3rem 2.5rem;
  position: relative;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-close {
  position: sticky;
  top: 0;
  float: right;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.25rem;
  color: var(--text-primary);
  transition: all 0.2s;
}

.modal-close:hover {
  background-color: var(--accent-terracotta);
  color: #fff;
}

.excerpt-body {
  margin-top: 1.5rem;
}

.excerpt-body p {
  margin-bottom: 1.4rem;
  font-size: 1.15rem;
  line-height: 1.8;
  color: #2D2723;
}

.excerpt-body p:first-of-type::first-letter {
  font-size: 3.5rem;
  float: left;
  line-height: 0.9;
  padding-right: 0.6rem;
  padding-top: 0.2rem;
  font-family: var(--font-serif);
  color: var(--accent-terracotta);
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  padding: 3.5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.65rem;
}

.footer-links a {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--text-secondary);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 900px) {
  .nav-links, .btn-header {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .newsletter-form {
    flex-direction: column;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
  .modal-content {
    padding: 2rem 1.5rem;
  }
}