/* ============================================
   RADICAL PROVISION — BOOK WEBSITE
   CSS Stylesheet
   ============================================ */

/* ============================================
   CUSTOM PROPERTIES
   ============================================ */

:root {
  /* Brand Colors */
  --forest:       #1C3A2A;
  --forest-dark:  #112619;
  --forest-mid:   #254D38;
  --amber:        #C47B2A;
  --amber-light:  #E8C49A;
  --amber-dark:   #9E621F;

  /* Neutrals */
  --white:        #FFFFFF;
  --parchment:    #F7EDD8;
  --parchment-mid:#EFE3C5;
  --gray-100:     #EAE2D0;
  --gray-200:     #D5CAB4;
  --gray-400:     #9A8F7A;
  --gray-600:     #6B6050;

  /* Text */
  --text-dark:    #1C1710;
  --text-medium:  #4A4235;
  --text-light:   #786E5E;

  /* Typography */
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Lato', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;

  /* Layout */
  --max-width:    1200px;
  --nav-height:   76px;

  /* Transitions */
  --t-fast: 0.18s ease;
  --t-med:  0.28s ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.10);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 40px rgba(0,0,0,0.15);
}

/* ============================================
   RESET & BASE
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-dark);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol { list-style: none; }

button { font-family: var(--font-body); }

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-dark);
}

h4, h5, h6 {
  font-family: var(--font-body);
  font-weight: 700;
  line-height: 1.4;
}

h1 { font-size: clamp(2.4rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.6rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
h4 { font-size: 1.1rem; }

p {
  margin-bottom: 1.25rem;
  color: var(--text-medium);
}
p:last-child { margin-bottom: 0; }

strong { color: var(--text-dark); font-weight: 700; }

.lead {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-medium);
}

/* ============================================
   LAYOUT
   ============================================ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container--narrow {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section { padding: 5rem 0; }
.section--light { background-color: var(--parchment); }
.section--dark  { background-color: var(--forest); }

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-header h2 { margin-bottom: 0.75rem; }

.section-header p {
  font-size: 1.05rem;
  max-width: 580px;
  margin: 0 auto;
}

/* Amber accent rule */
.amber-rule {
  width: 56px;
  height: 3px;
  background: var(--amber);
  margin: 0.85rem 0;
  border-radius: 2px;
}
.amber-rule--center { margin: 0.85rem auto; }

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 3.5rem 0; }
}

/* ============================================
   SKIP NAVIGATION (WCAG 2.4.1)
   ============================================ */

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--forest);
  color: var(--white);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  z-index: 9999;
  border-radius: 0 0 4px 0;
  font-weight: 700;
  font-size: 0.875rem;
}
.skip-link:focus { top: 0; }

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--forest-dark);
  z-index: 1000;
  border-bottom: 1px solid rgba(196,123,42,0.25);
  transition: box-shadow var(--t-med);
}

.nav.scrolled {
  box-shadow: 0 2px 24px rgba(0,0,0,0.40);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav__brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.nav__name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.01em;
}

.nav__tagline {
  font-size: 0.62rem;
  color: var(--amber);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-top: 1px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 400;
  color: rgba(255,255,255,0.78);
  padding: 0.45rem 0.8rem;
  border-radius: 4px;
  transition: color var(--t-fast), background var(--t-fast);
  letter-spacing: 0.02em;
}

.nav__link:hover { color: var(--white); background: rgba(255,255,255,0.08); }
.nav__link.active { color: var(--amber); }

.nav__cta {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--forest-dark);
  background: var(--amber);
  padding: 0.5rem 1.25rem;
  border-radius: 4px;
  margin-left: 0.75rem;
  transition: background var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
  white-space: nowrap;
}

.nav__cta:hover {
  background: var(--amber-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(196,123,42,0.40);
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--t-med);
}

@media (max-width: 900px) {
  .nav__hamburger { display: flex; }

  .nav__links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--forest-dark);
    flex-direction: column;
    padding: 1rem 1.5rem 2rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    gap: 0.15rem;
    align-items: flex-start;
  }

  .nav__links.open { display: flex; }

  .nav__link {
    width: 100%;
    font-size: 1rem;
    padding: 0.75rem 1rem;
  }

  .nav__cta {
    margin-left: 0;
    margin-top: 0.5rem;
    width: 100%;
    text-align: center;
    padding: 0.875rem 1rem;
  }
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: 4px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--t-fast);
  white-space: nowrap;
}

.btn--amber {
  background: var(--amber);
  color: var(--forest-dark);
  border-color: var(--amber);
}
.btn--amber:hover {
  background: var(--amber-dark);
  border-color: var(--amber-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(196,123,42,0.35);
}

.btn--outline-white {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.55);
}
.btn--outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
  transform: translateY(-2px);
}

.btn--outline-forest {
  background: transparent;
  color: var(--forest);
  border-color: var(--forest);
}
.btn--outline-forest:hover {
  background: var(--forest);
  color: var(--white);
  transform: translateY(-2px);
}

.btn--forest {
  background: var(--forest);
  color: var(--white);
  border-color: var(--forest);
}
.btn--forest:hover {
  background: var(--forest-mid);
  border-color: var(--forest-mid);
  transform: translateY(-2px);
}

.btn--sm {
  padding: 0.6rem 1.25rem;
  font-size: 0.875rem;
}

/* ============================================
   PAGE HERO (sub-pages)
   ============================================ */

.page-hero {
  background: var(--forest);
  padding: 7rem 0 4rem;
  margin-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(196,123,42,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(196,123,42,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
}

.page-hero .container { position: relative; z-index: 1; }

.page-hero__eyebrow {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 0.85rem;
}

.page-hero h1 {
  color: var(--white);
  margin-bottom: 1.25rem;
}

.page-hero p {
  color: rgba(255,255,255,0.88);
  font-size: 1.1rem;
  max-width: 600px;
  margin-bottom: 0;
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 8px;
  padding: 2rem;
  transition: transform var(--t-med), box-shadow var(--t-med);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card__link {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--forest);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: color var(--t-fast), gap var(--t-fast);
}

.card__link:hover { color: var(--amber-dark); gap: 0.7rem; }

/* ============================================
   BOOK CARD (series page)
   ============================================ */

.book-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2.5rem;
  align-items: start;
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: 8px;
  padding: 2.5rem;
  transition: box-shadow var(--t-med);
}

.book-card:hover { box-shadow: var(--shadow-lg); }

.book-card__cover {
  width: 100%;
  aspect-ratio: 2 / 3;
  border-radius: 4px 8px 8px 4px;
  overflow: hidden;
  box-shadow: -6px 6px 20px rgba(0,0,0,0.30), -2px 2px 4px rgba(0,0,0,0.15);
}

.book-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-card__cover--placeholder {
  background: linear-gradient(150deg, var(--forest-mid) 0%, var(--forest-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.25);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
  padding: 1rem;
}

.book-card__number {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 0.5rem;
}

.book-card h3 {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  color: var(--text-dark);
  margin-bottom: 0.4rem;
}

.book-card__subtitle {
  font-size: 1rem;
  color: var(--text-light);
  font-style: italic;
  margin-bottom: 1rem;
}

.book-card__status {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3rem 0.85rem;
  border-radius: 100px;
  margin-bottom: 1.25rem;
}

.book-card__status--coming {
  background: rgba(196,123,42,0.12);
  color: var(--amber-dark);
  border: 1px solid rgba(196,123,42,0.3);
}

.book-card__status--available {
  background: rgba(28,58,42,0.1);
  color: var(--forest-mid);
  border: 1px solid rgba(28,58,42,0.25);
}

@media (max-width: 768px) {
  .book-card {
    grid-template-columns: 1fr;
  }
  .book-card__cover { max-width: 160px; }
}

/* ============================================
   TESTIMONIALS
   ============================================ */

.testimonial {
  background: var(--white);
  border-left: 4px solid var(--amber);
  border-radius: 0 8px 8px 0;
  padding: 1.75rem 2rem;
}

.testimonial blockquote {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-style: italic;
  color: var(--text-dark);
  line-height: 1.65;
  margin-bottom: 1rem;
}

.testimonial__attribution {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--forest);
}

.testimonial__attribution span {
  font-weight: 400;
  color: var(--text-light);
}

/* ============================================
   AUTHOR PROFILE
   ============================================ */

.author-profile {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 4rem;
  align-items: start;
}

.author-photo {
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 3px solid rgba(196,123,42,0.2);
}

.author-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

@media (max-width: 900px) {
  .author-profile {
    grid-template-columns: 1fr;
  }
  .author-photo {
    max-width: 260px;
    margin: 0 auto;
  }
}

/* ============================================
   TAGS
   ============================================ */

.tag {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  background: rgba(196,123,42,0.1);
  color: var(--text-dark);
  border: 1px solid rgba(196,123,42,0.25);
}

.tag--forest {
  background: rgba(28,58,42,0.07);
  color: var(--forest);
  border-color: rgba(28,58,42,0.2);
}

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ============================================
   FORM
   ============================================ */

.form-group { margin-bottom: 1.5rem; }

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-dark);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  appearance: none;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--forest);
  box-shadow: 0 0 0 3px rgba(28,58,42,0.15), 0 0 0 5px rgba(196,123,42,0.2);
}

/* Inline email signup */
.signup-inline {
  display: flex;
  gap: 0.75rem;
  max-width: 480px;
}

.signup-inline input {
  flex: 1;
  padding: 0.875rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-dark);
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 4px;
  color: var(--white);
  transition: border-color var(--t-fast);
}

.signup-inline input::placeholder { color: rgba(255,255,255,0.5); }
.signup-inline input:focus {
  outline: none;
  border-color: var(--amber);
  background: rgba(255,255,255,0.15);
}

@media (max-width: 600px) {
  .signup-inline { flex-direction: column; }
  .signup-inline input { background: rgba(255,255,255,0.1); }
}

/* ============================================
   CTA BANNER
   ============================================ */

.cta-banner {
  background: var(--forest);
  padding: 4.5rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(196,123,42,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(196,123,42,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
}

.cta-banner .container { position: relative; z-index: 1; }

.cta-banner h2 { color: var(--white); margin-bottom: 1rem; }
.cta-banner p  { color: rgba(255,255,255,0.75); margin-bottom: 2rem; font-size: 1.05rem; }

.cta-banner .btn-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background: var(--forest-dark);
  color: rgba(255,255,255,0.65);
  padding: 3.5rem 0 1.75rem;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 1.75rem;
}

.footer__brand .nav__name {
  display: block;
  margin-bottom: 0.75rem;
}

.footer__brand p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.footer__ext-link {
  font-size: 0.875rem;
  color: var(--amber);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: color var(--t-fast);
}
.footer__ext-link:hover { color: var(--amber-light); }

.footer__heading {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 1rem;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer__links a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.75);
  transition: color var(--t-fast);
}
.footer__links a:hover { color: var(--amber-light); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.65);
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer__bottom p { color: rgba(255,255,255,0.65); }

@media (max-width: 768px) {
  .footer__inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer__bottom { flex-direction: column; text-align: center; }
}

/* ============================================
   UTILITIES
   ============================================ */

.text-center  { text-align: center; }
.text-white   { color: var(--white) !important; }
.text-amber   { color: var(--amber); }
.text-forest  { color: var(--forest); }
.text-medium  { color: var(--text-medium); }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-0 { margin-bottom: 0 !important; }

.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.divider {
  height: 1px;
  background: var(--gray-100);
  margin: 3rem 0;
}

.highlight-box {
  background: rgba(196,123,42,0.08);
  border: 1px solid rgba(196,123,42,0.2);
  border-radius: 8px;
  padding: 1.5rem 2rem;
}

.quote-large {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-style: italic;
  line-height: 1.55;
  color: var(--text-dark);
}

/* ============================================
   FADE-IN ANIMATION
   ============================================ */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   MOBILE ENHANCEMENTS (WCAG + UX)
   ============================================ */

@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .section { padding: 2.5rem 0; }
  .grid-2 { gap: 1.5rem; }

  .cta-banner .btn-group {
    flex-direction: column;
    gap: 0.75rem;
  }
  .cta-banner .btn-group .btn { width: 100%; }
}