/* ═══════════════════════════════════════════════════════
   FIRST LIGHT — Ghost Theme Styles
   Palette: soot blue, fog grey, lamp gold, the wrong yellow
   Typography: Cormorant Garamond + Inter
   ═══════════════════════════════════════════════════════ */

/* ── Reset & Foundations ──────────────────────────────── */

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

:root {
  --soot:        #12141c;
  --soot-blue:   #1a1f2e;
  --slate:       #252a3a;
  --fog:         #8a8f9a;
  --fog-light:   #b0b4bc;
  --stone:       #c8c4bc;
  --lamp-gold:   #d4a84b;
  --lamp-dim:    #b8923e;
  --wrong-yellow:#e8d07f;
  --brick:       #3d2c2a;
  --brick-dark:  #2a1f1e;
  --white-smoke: #e8e6e0;
  --warm-white:  #f5f3ed;

  --font-display: 'Cormorant Garamond', 'Georgia', serif;
  --font-body:    'Cormorant Garamond', 'Georgia', serif;
  --font-ui:      'Inter', -apple-system, sans-serif;

  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  6rem;
  --space-2xl: 10rem;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--stone);
  background-color: var(--soot);
  overflow-x: hidden;
}

::selection {
  background: var(--lamp-gold);
  color: var(--soot);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ── Grain Overlay ────────────────────────────────────── */

.grain {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.035;
  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");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ── Layout ───────────────────────────────────────────── */

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-narrow {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-xl) 0;
}

/* ── Navigation ───────────────────────────────────────── */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  transition: background 0.6s ease, padding 0.4s ease;
}

.site-nav.scrolled {
  background: rgba(18, 20, 28, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0.75rem var(--space-md);
}

.nav-title {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fog);
  text-decoration: none;
  transition: color 0.3s ease;
}

.nav-title:hover {
  color: var(--stone);
}

.nav-links {
  display: flex;
  gap: var(--space-md);
}

.nav-links a {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fog);
  text-decoration: none;
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--lamp-gold);
  transition: width 0.4s ease;
}

.nav-links a:hover {
  color: var(--warm-white);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links a.active {
  color: var(--warm-white);
}

.nav-links a.active::after {
  width: 100%;
  background: var(--lamp-gold);
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--fog);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
  background: rgba(18, 20, 28, 0.97);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
}

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

.mobile-menu a {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--stone);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color 0.3s ease;
}

.mobile-menu a:hover {
  color: var(--lamp-gold);
}

/* ── Hero ─────────────────────────────────────────────── */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--soot);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: radial-gradient(
    ellipse at 100% 60%,
    rgba(42, 48, 64, 0.6) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding-bottom: var(--space-2xl);
  opacity: 0;
  animation: heroFadeIn 3s ease 0.5s forwards;
}

@keyframes heroFadeIn {
  0% {
    opacity: 0;
    transform: translateY(12px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Gas lamp glow */
.gas-lamp-glow {
  animation: lampFlicker 8s ease-in-out infinite;
}

@keyframes lampFlicker {
  0%, 100% { opacity: 0.8; }
  30% { opacity: 1; }
  50% { opacity: 0.75; }
  70% { opacity: 0.95; }
  85% { opacity: 0.7; }
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(3.5rem, 10vw, 7rem);
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--warm-white);
  margin-bottom: var(--space-sm);
}

.title-first {
  display: block;
  opacity: 0;
  animation: titleReveal 2.5s ease 1.2s forwards;
}

.title-light {
  display: block;
  color: var(--lamp-gold);
  opacity: 0;
  animation: titleReveal 2.5s ease 1.8s forwards;
}

@keyframes titleReveal {
  0% {
    opacity: 0;
    letter-spacing: 0.15em;
  }
  100% {
    opacity: 1;
    letter-spacing: 0.06em;
  }
}

.hero-subtitle {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 300;
  font-style: italic;
  color: var(--fog);
  letter-spacing: 0.2em;
  margin-bottom: var(--space-xs);
  opacity: 0;
  animation: fadeIn 2s ease 2.5s forwards;
}

.hero-author {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 300;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fog);
  opacity: 0;
  animation: fadeIn 2s ease 3s forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

/* Street silhouette */
.street-scene {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: 1;
}

.street-scene svg {
  display: block;
  width: 100%;
  height: auto;
}

/* Window glow */
.window {
  transition: fill 2s ease, filter 2s ease;
}

.window.lit {
  fill: var(--lamp-gold);
  filter: url(#windowGlow);
  opacity: 0.7;
}

.window.lit-yellow {
  fill: var(--wrong-yellow);
  filter: url(#windowGlow);
  opacity: 0.8;
}

/* Scroll hint */
/* ── Book Section ─────────────────────────────────────── */

.section-book {
  background: var(--soot);
  padding: var(--space-2xl) 0;
}

.book-layout {
  max-width: 640px;
  margin: 0 auto;
}

.book-text p {
  font-family: var(--font-body);
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--stone);
  margin-bottom: 1.4em;
}

.book-text p:last-of-type {
  margin-bottom: 0;
}

.book-epigraph {
  max-width: 720px;
  margin: 0 auto var(--space-lg);
  padding: var(--space-lg) var(--space-md);
  background: rgba(232, 208, 127, 0.04);
  border: 1px solid rgba(232, 208, 127, 0.1);
  text-align: center;
}

.book-epigraph .eq-line {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 300;
  font-style: italic;
  line-height: 1.6;
  color: var(--wrong-yellow);
  margin: 0 0 0.3em;
  white-space: nowrap;
}

.book-epigraph .eq-line:last-of-type {
  margin-bottom: 0;
}

.book-epigraph footer {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fog);
  margin-top: var(--space-md);
}

.book-details {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fog);
  margin-top: var(--space-md) !important;
}

.motif-divider {
  text-align: center;
  margin: var(--space-lg) 0;
  opacity: 0.7;
}

.motif-divider img {
  display: inline-block;
  width: 52px;
  height: auto;
}

/* ── Excerpt Section ──────────────────────────────────── */

.section-excerpt {
  background: var(--soot-blue);
  padding: var(--space-2xl) 0;
  position: relative;
}

.section-excerpt::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--slate),
    transparent
  );
}

.excerpt-label {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fog);
  margin-bottom: var(--space-lg);
}

.excerpt-text p {
  font-family: var(--font-body);
  font-size: 1.25rem;
  line-height: 1.9;
  color: var(--warm-white);
  margin-bottom: 1.5em;
  font-weight: 300;
}

.excerpt-text p:first-child {
  font-size: 1.4rem;
  font-style: italic;
  color: var(--lamp-gold);
}

/* ── Writings Section ─────────────────────────────────── */

.section-writings {
  background: var(--soot);
  padding: var(--space-2xl) 0;
}

.section-heading {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 300;
  color: var(--warm-white);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-xs);
}

.section-intro {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--fog);
  font-style: italic;
  margin-bottom: var(--space-lg);
  max-width: 540px;
}

.writings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.writing-card {
  display: block;
  background: var(--soot-blue);
  border: 1px solid rgba(138, 143, 154, 0.08);
  padding: var(--space-md);
  text-decoration: none;
  transition: border-color 0.4s ease, transform 0.4s ease;
  cursor: pointer;
}

.writing-card:hover {
  border-color: rgba(212, 168, 75, 0.2);
  transform: translateY(-2px);
}

.writing-type {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lamp-gold);
  display: block;
  margin-bottom: var(--space-sm);
}

.writing-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--warm-white);
  margin-bottom: var(--space-xs);
  letter-spacing: 0.02em;
}

.writing-card p {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--fog-light);
  line-height: 1.6;
  margin-bottom: var(--space-sm);
}

.writing-date {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  color: var(--fog);
  letter-spacing: 0.1em;
}

/* ── Author Section ───────────────────────────────────── */

.section-author {
  background: var(--soot-blue);
  padding: var(--space-xl) 0;
  position: relative;
}

.section-author::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--slate),
    transparent
  );
}

.section-author p {
  font-family: var(--font-body);
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--stone);
  margin-bottom: 1em;
}

.contact-links {
  display: flex;
  gap: var(--space-md);
}

.contact-link {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fog);
  text-decoration: none;
  position: relative;
  transition: color 0.3s ease;
}

.contact-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--lamp-gold);
  transition: width 0.4s ease;
}

.contact-link:hover {
  color: var(--lamp-gold);
}

.contact-link:hover::after {
  width: 100%;
}

/* ── Newsletter Section ───────────────────────────────── */

.section-newsletter {
  background: var(--soot);
  padding: var(--space-xl) 0;
  text-align: center;
}

.newsletter-text {
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--fog-light);
  line-height: 1.7;
  margin-bottom: var(--space-md);
  font-style: italic;
}

.newsletter-form {
  display: flex;
  max-width: 440px;
  margin: 0 auto;
  gap: 0;
}

.newsletter-form input[type="email"] {
  flex: 1;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  padding: 0.85rem 1.2rem;
  background: var(--soot-blue);
  border: 1px solid var(--slate);
  color: var(--warm-white);
  outline: none;
  transition: border-color 0.3s ease;
  letter-spacing: 0.02em;
}

.newsletter-form input[type="email"]::placeholder {
  color: var(--fog);
  font-weight: 300;
}

.newsletter-form input[type="email"]:focus {
  border-color: var(--lamp-gold);
}

.newsletter-form button {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.85rem 1.8rem;
  background: transparent;
  border: 1px solid var(--slate);
  border-left: none;
  color: var(--fog-light);
  cursor: pointer;
  transition: background 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

.newsletter-form button:hover {
  background: var(--lamp-gold);
  border-color: var(--lamp-gold);
  color: var(--soot);
}

.newsletter-form button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.newsletter-success,
.newsletter-error {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  margin-top: var(--space-sm);
}

.newsletter-success {
  color: var(--lamp-gold);
}

.newsletter-error {
  color: #c07070;
}

/* ── Footer ───────────────────────────────────────────── */

.site-footer {
  padding: var(--space-md) 0;
  text-align: center;
}

.site-footer p {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--fog);
  opacity: 0.5;
}

/* ── Scroll-Reveal Animations ─────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0.1s; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.2s; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.3s; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.4s; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 0.5s; }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 0.6s; }
.reveal-stagger.visible > *:nth-child(7) { transition-delay: 0.7s; }

.reveal-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ───────────────────────────────────────── */

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-title {
    font-size: clamp(2.8rem, 12vw, 5rem);
  }

  .section {
    padding: var(--space-lg) 0;
  }

  .section-book,
  .section-excerpt,
  .section-writings {
    padding: var(--space-xl) 0;
  }

  .book-epigraph .eq-line {
    font-size: 1rem;
    white-space: normal;
  }

  .excerpt-text p {
    font-size: 1.1rem;
  }

  .excerpt-text p:first-child {
    font-size: 1.2rem;
  }

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

  .newsletter-form {
    flex-direction: column;
    gap: 0;
  }

  .newsletter-form button {
    border-left: 1px solid var(--slate);
    border-top: none;
  }

  .contact-links {
    justify-content: center;
  }

  .section-heading {
    font-size: 1.8rem;
  }

  .street-scene {
    opacity: 0.7;
  }
}

@media (max-width: 480px) {
  :root {
    --space-md: 1.5rem;
  }

  .hero-title {
    font-size: clamp(2.2rem, 14vw, 3.5rem);
  }

  .book-text p,
  .section-author p {
    font-size: 1.05rem;
  }
}

/* ── Print ────────────────────────────────────────────── */

@media print {
  .grain,
  .site-nav,
  .street-scene,
  .newsletter-form {
    display: none;
  }

  body {
    background: white;
    color: #222;
  }

  .hero {
    min-height: auto;
    padding: 2rem 0;
  }
}