/* ==========================================================================
   KLYVN — About page
   Only styles the six-chapter section. Header, footer, buttons and the
   hero come from style-butterfly.css / style-ancient.css, unchanged.
   ========================================================================== */

:root {
  --ab-bg: #0b0908;
  --ab-bg-alt: #110e0b;
  --ab-gold: #c9a35e;
  --ab-gold-soft: rgba(201, 163, 94, 0.18);
  --ab-ivory: #f3ead9;
  --ab-muted: rgba(243, 234, 217, 0.72);
  --ab-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

html { scroll-behavior: smooth; }

.ab-chapters {
  position: relative;
  color: var(--ab-ivory);
  background:
    linear-gradient(180deg, rgba(12, 48, 35, 0.82), rgba(12, 48, 35, 0.74) 50%, rgba(12, 48, 35, 0.84)),
    url("../img/about-servce.png") center / cover no-repeat fixed;
  background-color: #0C3023; /* fallback if the image fails to load */
}

/* ---------- Chapter shell ---------- */
.ab-chapter {
  position: relative;
  padding: clamp(5rem, 11vw, 9.5rem) 0;
  border-top: 1px solid var(--ab-gold-soft);
  scroll-margin-top: 80px;
  overflow: hidden;
}

.ab-chapter--alt {
  background:
    radial-gradient(ellipse 60% 50% at 85% 0%, rgba(201, 163, 94, 0.08), transparent 70%),
    rgba(6, 26, 19, 0.45);
}

.ab-chapter::after {              /* hairline gold glow on the top edge */
  content: "";
  position: absolute;
  top: -1px;
  left: 50%;
  width: min(420px, 60%);
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, var(--ab-gold), transparent);
  opacity: 0.7;
}

.ab-inner {
  width: min(1180px, 100% - 3rem);
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(180px, 240px) 1fr;
  gap: 2.5rem clamp(2.5rem, 7vw, 6rem);
  align-items: start;
}

/* ---------- Left: numeral + chapter name ---------- */
.ab-side {
  position: sticky;
  top: 120px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.ab-num {
  font-family: "Bodoni Moda", serif;
  font-weight: 400;
  font-size: clamp(5rem, 11vw, 9rem);
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 1px var(--ab-gold);
  letter-spacing: -0.02em;
}

.ab-label {
  margin-top: 1rem;
  font-family: "Montserrat", sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ab-gold);
}

.ab-name {
  font-family: "Italiana", serif;
  font-size: 1.5rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ab-ivory);
}

.ab-name::after {
  content: "";
  display: block;
  width: 56px;
  height: 1px;
  margin-top: 1.1rem;
  background: var(--ab-gold);
}

/* ---------- Right: question, body, statement ---------- */
.ab-main { max-width: 760px; }

.ab-question {
  margin: 0 0 2rem;
  font-family: "Bodoni Moda", serif;
  font-weight: 500;
  font-size: clamp(1.9rem, 4vw, 3.3rem);
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ab-ivory);
}

.ab-body p {
  margin: 0 0 1.25rem;
  font-family: "Cormorant Garamond", serif;
  font-weight: 400;
  font-size: clamp(1.2rem, 1.7vw, 1.5rem);
  line-height: 1.65;
  color: var(--ab-muted);
}

.ab-statement {
  position: relative;
  margin: 3rem 0 0;
  padding-top: 2rem;
  font-family: "Italiana", serif;
  font-size: clamp(1.3rem, 2.4vw, 1.9rem);
  line-height: 1.4;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ab-gold);
}

.ab-statement::before {           /* rule with a diamond, echoing the hero */
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, var(--ab-gold), transparent);
}

.ab-statement::after {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  width: 7px;
  height: 7px;
  background: var(--ab-gold);
  transform: rotate(45deg);
}

.ab-statement--grand {
  font-size: clamp(1.5rem, 3.2vw, 2.5rem);
  color: var(--ab-ivory);
}
.ab-statement--grand span {
  background: linear-gradient(100deg, var(--ab-ivory) 20%, var(--ab-gold) 80%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Chapter 4: the five Worlds ---------- */
.ab-worlds {
  list-style: none;
  margin: 2.5rem 0 2.5rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border: 1px solid var(--ab-gold-soft);
}

.ab-worlds li + li { border-left: 1px solid var(--ab-gold-soft); }

.ab-worlds a {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  height: 100%;
  padding: 1.6rem 1.1rem 1.8rem;
  color: var(--ab-ivory);
  text-decoration: none;
  transition: background 0.5s var(--ab-ease), transform 0.5s var(--ab-ease);
}

.ab-worlds a::after {             /* gold underline grows on hover */
  content: "";
  position: absolute;
  left: 1.1rem;
  right: 1.1rem;
  bottom: 0;
  height: 1px;
  background: var(--ab-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ab-ease);
}

.ab-worlds a:hover,
.ab-worlds a:focus-visible {
  background: rgba(201, 163, 94, 0.07);
  outline: none;
}
.ab-worlds a:hover::after,
.ab-worlds a:focus-visible::after { transform: scaleX(1); }

.ab-world-index {
  font-family: "Bodoni Moda", serif;
  font-style: italic;
  font-size: 0.95rem;
  color: var(--ab-gold);
}

.ab-world-name {
  font-family: "Italiana", serif;
  font-size: 1.45rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.ab-world-line {
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-size: 1.1rem;
  color: var(--ab-muted);
}

/* ---------- Fixed chapter index ---------- */
.ab-index {
  position: fixed;
  top: 50%;
  right: 1.75rem;
  z-index: 20;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.9rem;
}

.ab-index a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font-family: "Montserrat", sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: rgba(243, 234, 217, 0.45);
  transition: color 0.4s var(--ab-ease);
}

.ab-index a::after {
  content: "";
  width: 18px;
  height: 1px;
  background: currentColor;
  transition: width 0.4s var(--ab-ease);
}

.ab-index a:hover,
.ab-index a.is-active { color: var(--ab-gold); }
.ab-index a.is-active::after,
.ab-index a:hover::after { width: 34px; }

/* ---------- Scroll reveal (only when JS is running) ---------- */
.js .ab-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ab-ease), transform 0.9s var(--ab-ease);
}
.js .ab-reveal.is-visible { opacity: 1; transform: none; }
.js .ab-main .ab-reveal:nth-child(2) { transition-delay: 0.12s; }
.js .ab-main .ab-reveal:nth-child(3) { transition-delay: 0.24s; }
.js .ab-main .ab-reveal:nth-child(4) { transition-delay: 0.36s; }
.js .ab-main .ab-reveal:nth-child(5) { transition-delay: 0.48s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .ab-reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1199px) {
  .ab-index { display: none; }
}

@media (max-width: 991px) {
  .ab-inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .ab-side {
    position: static;
    flex-direction: row;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.4rem 1.2rem;
  }
  .ab-num { font-size: 4.5rem; }
  .ab-label { margin-top: 0; }
  .ab-name::after { display: none; }
  .ab-worlds { grid-template-columns: 1fr 1fr; }
  .ab-worlds li:nth-child(odd) { border-left: 0; }
  .ab-worlds li:nth-child(n + 3) { border-top: 1px solid var(--ab-gold-soft); }
  .ab-worlds li:last-child { grid-column: 1 / -1; }
  .ab-chapters { background-attachment: scroll; }
}

@media (max-width: 575px) {
  .ab-worlds { grid-template-columns: 1fr; }
  .ab-worlds li + li { border-left: 0; border-top: 1px solid var(--ab-gold-soft); }
  .ab-worlds li:last-child { grid-column: auto; }
  .ab-statement { letter-spacing: 0.08em; }
}