/* Ólafur Arnalds · The Living Manuscript */
/* A luminous manuscript floating in the aurora */

:root {
  --void:       #05070A;
  --void-deep:  #080A0E;
  --vellum:     rgba(232, 228, 220, 0.06);
  --vellum-solid: #E8E4DC;
  --ink:        #C9C3B8;
  --ink-dim:    #8A8478;
  --aurora:     #4A9B8E;
  --aurora-soft: rgba(74, 155, 142, 0.3);
  --rose:       #C49A9A;
  --rose-soft:  rgba(196, 154, 154, 0.25);
  --gold:       #D4C5A9;
  --serif:      'Cormorant Garamond', Georgia, serif;
  --ease-deep:  cubic-bezier(0.65, 0, 0.35, 1);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--serif);
  background: var(--void);
  color: var(--ink);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  cursor: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== AURORA BACKGROUND ===== */
#aurora {
  position: fixed;
  top: 0; left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* ===== MANUSCRIPT ===== */
.manuscript {
  position: relative;
  z-index: 1;
}

.folio {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 10vh 0;
}

.folio-inner {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 6vw;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 3rem;
  align-items: start;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s var(--ease-deep), transform 1.2s var(--ease-deep);
}

.folio.is-visible .folio-inner {
  opacity: 1;
  transform: translateY(0);
}

/* ===== MARGIN ===== */
.folio-margin {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 1.5rem;
  border-right: 1px solid var(--vellum);
  padding-right: 1.5rem;
  align-items: flex-end;
  text-align: right;
}

.margin-num {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.1em;
}

.margin-year {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-dim);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
  margin-top: 1rem;
}

/* ===== FRONTISPIECE ===== */
.frontispiece {
  text-align: center;
  padding: 15vh 0;
}

.front-year {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 2rem;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 1s var(--ease-deep), transform 1s var(--ease-deep);
}

.front-title {
  font-size: clamp(48px, 12vw, 140px);
  font-weight: 300;
  line-height: 0.95;
  font-style: italic;
  color: var(--vellum-solid);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1.4s var(--ease-deep) 0.3s, transform 1.4s var(--ease-deep) 0.3s;
}

.front-rule {
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 2.5rem auto;
  transition: width 1.2s var(--ease-deep) 0.8s;
}

.front-line {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--ink-dim);
  line-height: 1.7;
  max-width: 24em;
  margin: 0 auto;
  opacity: 0;
  transition: opacity 1s var(--ease-deep) 1.2s;
}

.front-scroll {
  margin-top: 4rem;
  font-size: 0.6rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--ink-dim);
  opacity: 0;
  animation: breathe 3s ease-in-out infinite 2s;
  transition: opacity 1s var(--ease-deep) 1.6s;
}

.folio.is-visible .front-year,
.folio.is-visible .front-title,
.folio.is-visible .front-line,
.folio.is-visible .front-scroll {
  opacity: 1;
  transform: translateY(0);
}

.folio.is-visible .front-rule {
  width: 80px;
}

@keyframes breathe {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.8; }
}

/* ===== FOLIO CONTENT ===== */
.folio-content {
  padding: 2rem 0;
}

.folio-ord {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 1rem;
}

.folio-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 300;
  font-style: italic;
  line-height: 1.1;
  color: var(--vellum-solid);
  margin-bottom: 0.3rem;
}

.folio-sub {
  font-size: 1rem;
  font-style: italic;
  color: var(--ink-dim);
  margin-bottom: 1.5rem;
}

.folio-staff {
  margin: 1.5rem 0;
  opacity: 0.35;
  overflow: hidden;
}

.staff-svg {
  width: 100%;
  max-width: 400px;
  height: auto;
}

.staff-line {
  stroke: var(--ink-dim);
  stroke-width: 0.5;
}

.note {
  fill: var(--ink-dim);
  opacity: 0;
  transition: opacity 0.6s var(--ease-deep);
}

.folio.is-visible .note {
  opacity: 0.5;
}

.note-rect {
  fill: var(--ink-dim);
  opacity: 0;
  transition: opacity 0.6s var(--ease-deep);
}

.folio.is-visible .note-rect {
  opacity: 0.4;
}

.stem {
  stroke: var(--ink-dim);
  stroke-width: 0.8;
  opacity: 0;
  transition: opacity 0.6s var(--ease-deep);
}

.folio.is-visible .stem {
  opacity: 0.5;
}

.slur {
  stroke: var(--ink-dim);
  stroke-width: 0.6;
  fill: none;
  opacity: 0;
  transition: opacity 0.8s var(--ease-deep);
}

.folio.is-visible .slur {
  opacity: 0.3;
}

/* Staggered note reveals */
.folio.is-visible .note:nth-child(6)  { transition-delay: 0.1s; }
.folio.is-visible .note:nth-child(7)  { transition-delay: 0.2s; }
.folio.is-visible .note:nth-child(8)  { transition-delay: 0.3s; }
.folio.is-visible .note:nth-child(9)  { transition-delay: 0.4s; }
.folio.is-visible .note:nth-child(10) { transition-delay: 0.5s; }
.folio.is-visible .note:nth-child(11) { transition-delay: 0.6s; }
.folio.is-visible .note:nth-child(12) { transition-delay: 0.7s; }
.folio.is-visible .note:nth-child(13) { transition-delay: 0.8s; }
.folio.is-visible .note:nth-child(14) { transition-delay: 0.9s; }

.folio-rule {
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
  margin: 1.5rem 0;
  transition: width 1s var(--ease-deep);
}

.folio.is-visible .folio-rule {
  width: 60px;
}

.folio-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--ink);
  max-width: 480px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 1s var(--ease-deep) 0.4s, transform 1s var(--ease-deep) 0.4s;
}

.folio.is-visible .folio-body {
  opacity: 1;
  transform: translateY(0);
}

/* ===== COLOPHON ===== */
.folio-colophon .folio-inner {
  grid-template-columns: 1fr;
  text-align: center;
}

.colophon-content {
  padding: 10vh 0;
}

.colophon-ord {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 1rem;
}

.colophon-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 300;
  font-style: italic;
  line-height: 1.15;
  color: var(--vellum-solid);
}

.colophon-rule {
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 2rem auto;
  transition: width 1s var(--ease-deep);
}

.folio.is-visible .colophon-rule {
  width: 100px;
}

.colophon-body {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink-dim);
  opacity: 0;
  transition: opacity 1s var(--ease-deep) 0.3s;
}

.folio.is-visible .colophon-body {
  opacity: 1;
}

.colophon-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2.5rem;
  opacity: 0;
  transition: opacity 1s var(--ease-deep) 0.6s;
}

.folio.is-visible .colophon-links {
  opacity: 1;
}

.colophon-links a {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-dim);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-dim);
  padding-bottom: 0.2rem;
  transition: color 0.4s, border-color 0.4s;
}

.colophon-links a:hover {
  color: var(--aurora);
  border-color: var(--aurora);
}

/* ===== CURSOR ===== */
#cursor {
  position: fixed;
  top: 0; left: 0;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--gold);
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  mix-blend-mode: difference;
  transition: width 0.3s var(--ease-deep), height 0.3s var(--ease-deep);
}

#cursor.is-hover {
  width: 32px; height: 32px;
  background: transparent;
  border: 1px solid var(--gold);
}

@media (hover: none) {
  #cursor { display: none; }
  body { cursor: auto; }
}

/* ===== FOCUS ===== */
:focus-visible {
  outline: 1px solid var(--aurora);
  outline-offset: 3px;
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {
  .folio-inner {
    grid-template-columns: 50px 1fr;
    gap: 1.5rem;
    padding: 0 5vw;
  }
  .folio-margin {
    padding-right: 0.8rem;
  }
  .margin-year {
    font-size: 0.5rem;
  }
  .folio {
    padding: 8vh 0;
    min-height: auto;
  }
  .frontispiece {
    padding: 12vh 0;
  }
  .folio-staff {
    max-width: 280px;
  }
  .colophon-links {
    flex-direction: column;
    gap: 1rem;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .folio-inner {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .folio-margin {
    flex-direction: row;
    border-right: none;
    border-bottom: 1px solid var(--vellum);
    padding: 0 0 0.8rem;
    align-items: center;
    text-align: left;
    gap: 1rem;
  }
  .margin-year {
    writing-mode: horizontal-tb;
    transform: none;
    margin-top: 0;
  }
}