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

:root {
  --bg: #FAFAF8;
  --fg: #1A1A1A;
  --fg2: #777;
  --fg3: #ABABAB;
  --accent: #2D2DFF;
  --accent-dim: rgba(45, 45, 255, 0.07);
  --gold: #C4A35A;
  --serif: 'Noto Serif JP', 'Cormorant Garamond', serif;
  --display: 'Cormorant Garamond', serif;
  --mono: ui-monospace, 'SF Mono', monospace;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  line-height: 1.9;
}

/* ══ PRELOADER ══ */

.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: preloader-out 0.6s 2.2s forwards;
}

.preloader-text {
  font-family: var(--display);
  font-size: 1.2rem;
  font-weight: 300;
  letter-spacing: 0.4em;
  color: var(--fg3);
  animation: preloader-fade 1.5s 0.3s forwards;
  opacity: 0;
}

@keyframes preloader-fade {
  0% { opacity: 0; transform: translateY(8px); }
  40% { opacity: 1; transform: translateY(0); }
  80% { opacity: 1; }
  100% { opacity: 0; }
}

@keyframes preloader-out {
  to { opacity: 0; pointer-events: none; visibility: hidden; }
}

/* ══ HERO ══ */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding: 2rem;
}

.hero::before {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  width: 500px;
  height: 500px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, var(--accent-dim), transparent 65%);
  animation: breathe 6s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.7; transform: translate(-50%, -50%) scale(1.15); }
}

.hero-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.5em;
  color: var(--fg3);
  margin-bottom: 3rem;
  opacity: 0;
  animation: fade-up 1s 2.6s forwards;
}

.hero-symbol {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(8rem, 22vw, 15rem);
  line-height: 1;
  color: var(--accent);
  position: relative;
  opacity: 0;
  animation: symbol-in 1.8s 2.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes symbol-in {
  from { opacity: 0; transform: translateY(40px) scale(0.9); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.hero-title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(1.2rem, 3vw, 1.7rem);
  letter-spacing: 0.2em;
  color: var(--fg);
  margin-top: 1.5rem;
  opacity: 0;
  animation: fade-up 1s 3s forwards;
}

.hero-sub {
  font-family: var(--display);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  color: var(--fg2);
  margin-top: 0.5rem;
  opacity: 0;
  animation: fade-up 1s 3.2s forwards;
}

.hero-question {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(0.85rem, 1.6vw, 0.95rem);
  color: var(--fg3);
  margin-top: 2.5rem;
  opacity: 0;
  animation: fade-up 1s 3.5s forwards;
}

.scroll-cue {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  animation: fade-up 1s 4s forwards;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.scroll-cue span {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.4em;
  color: var(--fg3);
}

.scroll-cue-line {
  width: 1px;
  height: 36px;
  background: var(--fg3);
  animation: scroll-line 2.5s ease-in-out infinite;
}

@keyframes scroll-line {
  0%, 100% { opacity: 0.15; transform: scaleY(0.5); }
  50% { opacity: 0.5; transform: scaleY(1); }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ══ COMMONS ══ */

.inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2rem;
}

.slabel {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.5em;
  color: var(--fg3);
  margin-bottom: 2rem;
}

.divider {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 2rem;
}

.divider-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.08), transparent);
}

/* ══ FOUR WORDS ══ */

.words-section {
  padding: 5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.words-heading {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.5em;
  color: var(--fg3);
  margin-bottom: 2rem;
  text-align: center;
}

.words-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  max-width: 460px;
  width: 100%;
  position: relative;
}

.words-grid::before,
.words-grid::after {
  content: '';
  position: absolute;
  background: var(--fg3);
  opacity: 0.15;
}

.words-grid::before {
  width: 1px;
  height: 100%;
  left: 50%;
  top: 0;
}

.words-grid::after {
  width: 100%;
  height: 1px;
  top: 50%;
  left: 0;
}

.word-cell {
  padding: 1.8rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.word-en {
  font-family: var(--display);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 300;
  color: var(--accent);
}

.word-ja {
  font-family: var(--serif);
  font-size: 0.78rem;
  font-weight: 300;
  color: var(--fg2);
}

/* ══ DEFINITION ══ */

.def-section {
  padding: 7rem 0;
}

.def-text {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(0.92rem, 1.6vw, 1.05rem);
  line-height: 2.3;
  color: var(--fg2);
  max-width: 600px;
}

.def-formula {
  margin-top: 2.5rem;
  padding: 2rem 2.5rem;
  border-left: 2px solid var(--accent);
  background: linear-gradient(90deg, var(--accent-dim), transparent 50%);
}

.def-formula-main {
  font-family: var(--display);
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  font-weight: 300;
  color: var(--fg);
}

.def-formula-main .op {
  color: var(--accent);
  font-weight: 600;
}

.def-formula-note {
  font-family: var(--mono);
  font-size: 0.58rem;
  color: var(--fg3);
  letter-spacing: 0.15em;
  margin-top: 0.6rem;
}

/* ══ THREE OPERATORS ══ */

.three-section {
  padding: 7rem 0;
}

.three-intro {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(0.9rem, 1.5vw, 1rem);
  line-height: 2.2;
  color: var(--fg2);
  max-width: 580px;
  margin-bottom: 3rem;
}

.three-cards {
  display: flex;
  gap: 1.5rem;
}

.three-card {
  flex: 1;
  padding: 2.5rem 1.8rem;
  background: white;
  position: relative;
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: border-color 0.4s, box-shadow 0.4s;
}

.three-card:hover {
  border-color: rgba(0, 0, 0, 0.1);
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.04);
}

.three-card-accent {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.tc-symbol {
  font-family: var(--display);
  font-size: 2.6rem;
  font-weight: 300;
  margin-bottom: 0.3rem;
  line-height: 1;
}

.tc-symbol sup.inv {
  font-size: 0.4em;
  vertical-align: super;
  font-weight: 400;
  letter-spacing: -0.05em;
}

.tc-name {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 400;
  margin-bottom: 0.3rem;
}

.tc-en {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.25em;
  color: var(--fg3);
  margin-bottom: 1.2rem;
}

.tc-meta {
  font-family: var(--serif);
  font-size: 0.82rem;
  font-weight: 300;
  color: var(--fg2);
  line-height: 1.9;
}

.tc-metaphor {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  font-family: var(--serif);
  font-size: 0.88rem;
  font-style: italic;
  color: var(--fg);
}

/* ══ FRAGMENT ══ */

.fragment-section {
  padding: 6rem 2rem;
  text-align: center;
}

.fragment-text {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(1.1rem, 2.5vw, 1.45rem);
  line-height: 2.5;
  color: var(--fg);
  max-width: 580px;
  margin: 0 auto;
}

.redacted {
  background: var(--fg);
  color: var(--fg);
  padding: 0.08em 0.7em;
  margin: 0 0.1em;
  border-radius: 2px;
  cursor: default;
  transition: all 0.4s ease;
  user-select: none;
  display: inline-block;
}

.redacted:hover {
  background: var(--accent-dim);
  color: var(--accent);
  padding: 0.08em 0.3em;
}

/* ══ CLOSING ══ */

.closing {
  min-height: 55vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
}

.closing-quote {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  line-height: 2.4;
  color: var(--fg);
  max-width: 500px;
}

.closing-cta {
  font-family: var(--serif);
  font-weight: 300;
  font-size: 0.9rem;
  color: var(--fg2);
  margin-top: 2rem;
}

.closing-cta a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 45, 255, 0.2);
  transition: border-color 0.3s;
}

.closing-cta a:hover {
  border-color: var(--accent);
}

.closing-symbol {
  font-family: var(--display);
  font-size: 3rem;
  color: var(--accent);
  margin-top: 2rem;
  opacity: 0.3;
}

/* ══ FOOTER ══ */

footer {
  text-align: center;
  padding: 3rem 2rem;
  border-top: 1px solid rgba(0, 0, 0, 0.04);
}

footer a {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.35em;
  color: var(--fg3);
  text-decoration: none;
  transition: color 0.3s;
}

footer a:hover {
  color: var(--accent);
}

/* ══ REVEAL ══ */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1s ease, transform 1s ease;
}

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

/* ══ RESPONSIVE ══ */

@media (max-width: 640px) {
  html {
    font-size: 20px;
  }

  .words-grid {
    grid-template-columns: 1fr;
    max-width: 240px;
  }

  .words-grid::before,
  .words-grid::after {
    display: none;
  }

  .word-cell {
    padding: 1.5rem 1.2rem;
  }

  .word-cell:not(:last-child) {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  }

  .three-cards {
    flex-direction: column;
  }

  .three-card {
    padding: 2.5rem 1.8rem;
  }

  .inner {
    padding: 0 1.5rem;
  }
}

/* ══ REDUCED MOTION ══ */

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

  .preloader {
    display: none;
  }

  .hero-label,
  .hero-symbol,
  .hero-title,
  .hero-sub,
  .hero-question,
  .scroll-cue {
    opacity: 1;
    transform: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}