/* === PatternShift — Cinematic Noir === */

:root {
  --black: #0a0a0a;
  --deep-black: #050505;
  --deep-red: #8b1a1a;
  --warm-red: #b22234;
  --gold: #c9a84c;
  --warm-gold: #d4af37;
  --cream: #f5f0e8;
  --cream-muted: #e8e0d0;
  --gray: #888;
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Space Grotesk', system-ui, sans-serif;
}

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

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

body {
  background: var(--black);
  color: var(--cream);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* === HERO === */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: radial-gradient(ellipse at 30% 50%, rgba(139,26,26,0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 80%, rgba(201,168,76,0.08) 0%, transparent 50%),
              var(--deep-black);
  overflow: hidden;
}

.hero-grain {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 2rem;
  max-width: 900px;
}

.hero-tag {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 2.5rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--cream);
  letter-spacing: -0.02em;
}

.hero-title .accent {
  color: var(--warm-red);
  font-style: italic;
}

.hero-title .gold {
  color: var(--warm-gold);
}

.hero-divider {
  width: 60px;
  height: 2px;
  background: var(--gold);
  margin: 2rem auto;
}

.hero-sub {
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--cream-muted);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-line {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, var(--gold));
  animation: scroll-fade 2s ease-in-out infinite;
}

@keyframes scroll-fade {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* === PHILOSOPHY === */

.philosophy {
  padding: 8rem 2rem;
  background: var(--deep-black);
  border-top: 1px solid rgba(201,168,76,0.1);
}

.philosophy-inner {
  max-width: 720px;
  margin: 0 auto;
}

.philosophy-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 2.5rem;
}

.philosophy-quote {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.5vw, 2.4rem);
  font-weight: 400;
  font-style: italic;
  line-height: 1.4;
  color: var(--cream);
  border-left: 3px solid var(--deep-red);
  padding-left: 1.5rem;
  margin-bottom: 3rem;
}

.philosophy-text {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--cream-muted);
  margin-bottom: 1.5rem;
}

.philosophy-text em {
  color: var(--cream);
  font-style: italic;
}

/* === BOOK === */

.book {
  padding: 8rem 2rem;
  background: linear-gradient(180deg, var(--deep-black) 0%, rgba(139,26,26,0.06) 50%, var(--deep-black) 100%);
}

.book-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4rem;
  align-items: center;
}

.book-visual {
  display: flex;
  justify-content: center;
}

.book-mockup {
  width: 220px;
  height: 320px;
  display: flex;
  transform: perspective(800px) rotateY(-8deg);
  box-shadow: 20px 20px 60px rgba(0,0,0,0.6), -2px -2px 10px rgba(201,168,76,0.05);
}

.book-spine {
  width: 24px;
  background: linear-gradient(180deg, var(--deep-red), #5a0f0f);
  border-radius: 3px 0 0 3px;
}

.book-cover {
  flex: 1;
  background: linear-gradient(160deg, #1a1a1a 0%, #0d0d0d 100%);
  border: 1px solid rgba(201,168,76,0.15);
  border-left: none;
  border-radius: 0 3px 3px 0;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.book-cover-author {
  font-family: var(--font-body);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.book-cover-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--cream);
}

.book-cover-accent {
  width: 30px;
  height: 2px;
  background: var(--deep-red);
}

.book-cover-subtitle {
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--cream-muted);
}

.book-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
}

.book-heading {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--cream);
  margin-bottom: 1.5rem;
}

.book-desc {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--cream-muted);
  margin-bottom: 2rem;
}

.book-formats {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.format-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--cream-muted);
  background: rgba(201,168,76,0.06);
  border: 1px solid rgba(201,168,76,0.12);
  padding: 0.5rem 1rem;
  border-radius: 4px;
}

.format-icon {
  color: var(--gold);
  font-size: 0.75rem;
}

/* === PRINCIPLES === */

.principles {
  padding: 8rem 2rem;
  background: var(--black);
}

.principles-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.principles-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 3rem;
  text-align: center;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.principle-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(201,168,76,0.08);
  padding: 2.5rem 2rem;
  border-radius: 2px;
  transition: border-color 0.3s ease;
}

.principle-card:hover {
  border-color: rgba(201,168,76,0.25);
}

.principle-card.featured {
  border-color: var(--deep-red);
  background: rgba(139,26,26,0.06);
}

.principle-number {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--gold);
  display: block;
  margin-bottom: 1.2rem;
}

.principle-text {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  font-style: italic;
  line-height: 1.4;
  color: var(--cream);
}

/* === ECOSYSTEM === */

.ecosystem {
  padding: 8rem 2rem;
  background: linear-gradient(180deg, var(--black) 0%, var(--deep-black) 100%);
  border-top: 1px solid rgba(201,168,76,0.06);
}

.ecosystem-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.ecosystem-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
  text-align: center;
}

.ecosystem-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 4rem;
  color: var(--cream);
}

.ecosystem-heading .gold {
  color: var(--warm-gold);
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.eco-item {
  padding: 2rem;
  background: rgba(255,255,255,0.015);
  border: 1px solid rgba(201,168,76,0.06);
  border-radius: 2px;
}

.eco-icon {
  font-size: 1.5rem;
  color: var(--gold);
  display: block;
  margin-bottom: 1rem;
}

.eco-item h4 {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 0.75rem;
}

.eco-item p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--cream-muted);
}

/* === CLOSING === */

.closing {
  padding: 10rem 2rem;
  text-align: center;
  background: radial-gradient(ellipse at 50% 50%, rgba(139,26,26,0.1) 0%, transparent 60%),
              var(--deep-black);
}

.closing-inner {
  max-width: 800px;
  margin: 0 auto;
}

.closing-line {
  width: 40px;
  height: 2px;
  background: var(--gold);
  margin: 0 auto 3rem;
}

.closing-statement {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--cream);
  margin-bottom: 2rem;
}

.closing-statement .gold {
  color: var(--warm-gold);
}

.closing-author {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--cream-muted);
}

/* === FOOTER === */

.site-footer {
  padding: 3rem 2rem;
  text-align: center;
  border-top: 1px solid rgba(201,168,76,0.08);
  background: var(--deep-black);
}

.footer-inner {
  max-width: 600px;
  margin: 0 auto;
}

.footer-brand {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--cream-muted);
  margin-bottom: 0.3rem;
}

.footer-tagline {
  font-size: 0.75rem;
  color: var(--gray);
}

/* === RESPONSIVE === */

@media (max-width: 768px) {
  .book-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .book-formats {
    justify-content: center;
  }

  .book-mockup {
    transform: perspective(800px) rotateY(0deg);
    width: 180px;
    height: 260px;
  }

  .principles-grid {
    grid-template-columns: 1fr;
  }

  .ecosystem-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 90vh;
  }

  .philosophy {
    padding: 5rem 1.5rem;
  }

  .book {
    padding: 5rem 1.5rem;
  }

  .principles {
    padding: 5rem 1.5rem;
  }

  .ecosystem {
    padding: 5rem 1.5rem;
  }

  .closing {
    padding: 6rem 1.5rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .chapters {
    padding: 5rem 1.5rem;
  }

  .signup {
    padding: 5rem 1.5rem;
  }

  .signup-field {
    flex-direction: column;
    gap: 0.75rem;
  }

  .signup-input,
  .signup-btn {
    width: 100%;
  }
}

/* === BUTTONS === */

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  background: var(--deep-red);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.9rem 2rem;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}

.btn-primary:hover {
  background: var(--warm-red);
  transform: translateY(-1px);
}

.btn-ghost {
  display: inline-block;
  background: transparent;
  color: var(--cream-muted);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.9rem 2rem;
  border: 1px solid rgba(245,240,232,0.15);
  border-radius: 2px;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.btn-ghost:hover {
  border-color: var(--gold);
  color: var(--cream);
}

/* === CHAPTERS === */

.chapters {
  padding: 8rem 2rem;
  background: var(--deep-black);
  border-top: 1px solid rgba(201,168,76,0.08);
}

.chapters-inner {
  max-width: 860px;
  margin: 0 auto;
}

.chapters-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
}

.chapters-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--cream);
  margin-bottom: 1rem;
}

.chapters-heading .gold {
  color: var(--warm-gold);
}

.chapters-intro {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--cream-muted);
  margin-bottom: 4rem;
}

.chapters-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.chapter-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid rgba(201,168,76,0.06);
  align-items: start;
}

.chapter-item:last-child {
  border-bottom: none;
}

.chapter-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding-top: 0.2rem;
}

.chapter-num {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--gold);
  white-space: nowrap;
}

.chapter-divider {
  display: block;
  width: 24px;
  height: 1px;
  background: rgba(201,168,76,0.2);
  margin-top: 0.75rem;
}

.chapter-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cream);
  margin-bottom: 0.6rem;
  line-height: 1.3;
}

.chapter-preview {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--cream-muted);
}

.chapters-cta {
  margin-top: 4rem;
  text-align: center;
}

/* === PRINCIPLES INTERACTIVE === */

.principles-hint {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--gray);
  text-align: center;
  margin-bottom: 2.5rem;
  text-transform: uppercase;
}

.principle-card {
  cursor: pointer;
  position: relative;
}

.principle-card:focus {
  outline: 1px solid rgba(201,168,76,0.4);
  outline-offset: 3px;
}

.principle-front {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.principle-toggle {
  margin-left: auto;
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--gold);
  line-height: 1;
  transition: transform 0.2s ease;
  flex-shrink: 0;
  padding-left: 1rem;
}

.principle-card[aria-expanded="true"] .principle-toggle {
  transform: rotate(45deg);
}

.principle-expand {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.3s ease, padding 0.3s ease;
  opacity: 0;
  padding-top: 0;
}

.principle-card[aria-expanded="true"] .principle-expand {
  max-height: 200px;
  opacity: 1;
  padding-top: 1.25rem;
}

.principle-expand p {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--cream-muted);
  border-left: 2px solid rgba(139,26,26,0.5);
  padding-left: 1rem;
}

.principle-card.featured .principle-expand p {
  border-left-color: var(--deep-red);
}

/* === SIGNUP === */

.signup {
  padding: 10rem 2rem;
  background: radial-gradient(ellipse at 50% 0%, rgba(139,26,26,0.18) 0%, transparent 55%),
              var(--black);
  border-top: 1px solid rgba(201,168,76,0.07);
  position: relative;
  overflow: hidden;
}

.signup-grain {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  pointer-events: none;
}

.signup-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.signup-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
}

.signup-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--cream);
  margin-bottom: 1.25rem;
}

.signup-heading .gold {
  color: var(--warm-gold);
}

.signup-sub {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--cream-muted);
  margin-bottom: 2.5rem;
}

.signup-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.signup-field {
  display: flex;
  gap: 0;
}

.signup-input {
  flex: 1;
  background: rgba(245,240,232,0.04);
  border: 1px solid rgba(245,240,232,0.12);
  border-right: none;
  border-radius: 2px 0 0 2px;
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.9rem 1.25rem;
  outline: none;
  transition: border-color 0.2s ease;
  min-width: 0;
}

.signup-input::placeholder {
  color: var(--gray);
}

.signup-input:focus {
  border-color: rgba(201,168,76,0.3);
}

.signup-btn {
  background: var(--deep-red);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  border-radius: 0 2px 2px 0;
  padding: 0.9rem 1.6rem;
  cursor: pointer;
  transition: background 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.signup-btn:hover:not(:disabled) {
  background: var(--warm-red);
}

.signup-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.signup-message {
  font-size: 0.9rem;
  min-height: 1.4rem;
  text-align: center;
}

.signup-message--success { color: var(--warm-gold); }
.signup-message--info    { color: var(--gold); }
.signup-message--error   { color: #e05050; }

.signup-promise {
  font-size: 0.78rem;
  color: var(--gray);
  margin-top: 1.25rem;
  letter-spacing: 0.05em;
}