/* double-standard.xyz - Glassmorphic Duality / Three-Plane Depth */

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

:root{
  --warm-cream:#FBF7F0;
  --blush-mist:#F0E0D6;
  --dusty-rose:#D4A0A0;
  --sage-glass:#A8BFB0;
  --charcoal-velvet:#2C2A35;
  --lavender-ash:#9B8EA8;
  --peach-glow:#F2C4A0;
  --glass-white:rgba(251,247,240,0.65);
  --ease-glass:cubic-bezier(0.25,0.46,0.45,0.94);
  --ease-reveal:cubic-bezier(0.22,1,0.36,1);
  --baseline:1.618rem;
}

html{scroll-behavior:smooth}

body{
  font-family:'DM Sans',sans-serif;
  background:var(--warm-cream);
  color:var(--charcoal-velvet);
  overflow-x:hidden;
  line-height:1.7;
}

/* Scene Container */
.scene{
  position:relative;
  isolation:isolate;
  min-height:100vh;
}

/* ========== PLANE A: Background Waves ========== */
.plane-a{
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  overflow:hidden;
}

.wave-bg{
  position:absolute;
  width:120%;
  left:-10%;
  height:200px;
  opacity:0.5;
  animation:waveDrift 30s linear infinite;
}

.wave-ch1{
  top:40%;
}

@keyframes waveDrift{
  0%{transform:translateX(0)}
  100%{transform:translateX(60px)}
}

/* ========== PLANE B: Content ========== */
.plane-b{
  position:relative;
  z-index:1;
  width:55.9%;
  margin-left:5.9%;
  padding:0;
}

/* Chapters */
.chapter{
  min-height:100svh;
  display:flex;
  align-items:center;
  padding:clamp(4rem,8vw,10rem) 0;
}

.chapter-content{
  position:relative;
  width:100%;
}

.chapter-num{
  font-family:'IBM Plex Mono',monospace;
  font-size:clamp(0.75rem,1vw,0.9rem);
  font-weight:400;
  letter-spacing:0.12em;
  color:var(--dusty-rose);
  display:block;
  margin-bottom:calc(var(--baseline) * 2);
}

.chapter-heading{
  font-family:'Barlow Condensed',sans-serif;
  font-size:clamp(2rem,4vw,4rem);
  font-weight:600;
  letter-spacing:-0.02em;
  text-transform:uppercase;
  line-height:1.05;
  color:var(--charcoal-velvet);
  margin-bottom:calc(var(--baseline) * 2);
}

/* Hero (Chapter 1) */
.hero-split{
  font-family:'Barlow Condensed',sans-serif;
  font-size:clamp(4rem,12vw,9rem);
  font-weight:600;
  letter-spacing:-0.02em;
  text-transform:uppercase;
  line-height:0.95;
  color:var(--charcoal-velvet);
  margin-bottom:calc(var(--baseline) * 2);
}

.word-double{
  display:inline-block;
}

.hero-def{
  font-family:'DM Sans',sans-serif;
  font-size:clamp(1rem,1.2vw,1.25rem);
  font-weight:400;
  line-height:1.7;
  color:var(--charcoal-velvet);
  max-width:480px;
  min-height:3.4rem;
}

.hero-def .cursor{
  display:inline-block;
  width:2px;
  height:1.1em;
  background:var(--dusty-rose);
  vertical-align:text-bottom;
  animation:blink 0.8s step-end infinite;
}

@keyframes blink{
  0%,100%{opacity:1}
  50%{opacity:0}
}

/* Chapter 2: Split Columns */
.split-columns{
  margin-top:calc(var(--baseline) * 2);
}

.col-warm p{
  font-family:'DM Sans',sans-serif;
  font-size:clamp(1rem,1.2vw,1.25rem);
  font-weight:400;
  line-height:1.7;
  color:var(--charcoal-velvet);
  max-width:520px;
}

/* Chapter 3: Glass Cascade */
.glass-cascade{
  display:flex;
  flex-direction:column;
  gap:calc(var(--baseline) * 1.5);
  margin-top:calc(var(--baseline) * 2);
  margin-bottom:calc(var(--baseline) * 3);
}

.glass-card{
  width:clamp(220px,60%,360px);
  padding:24px 28px;
  border-radius:16px;
  backdrop-filter:blur(16px) saturate(1.5);
  -webkit-backdrop-filter:blur(16px) saturate(1.5);
  background:rgba(251,247,240,0.45);
  border:1px solid rgba(212,160,160,0.25);
  box-shadow:0 8px 32px rgba(44,42,53,0.08);
  opacity:0;
  transform:translateY(20px);
  transition:opacity 0.6s var(--ease-reveal),transform 0.6s var(--ease-reveal);
}

.glass-card.visible{
  opacity:1;
  transform:translateY(0);
  animation:gentleFloat 6s ease-in-out infinite;
}

.glass-card[data-side="left"]{
  align-self:flex-start;
}

.glass-card[data-side="right"]{
  align-self:flex-end;
}

.glass-card p{
  font-family:'DM Sans',sans-serif;
  font-size:clamp(0.9rem,1.1vw,1.05rem);
  font-weight:500;
  font-style:italic;
  line-height:1.5;
  color:var(--charcoal-velvet);
}

@keyframes gentleFloat{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-4px)}
}

/* Pulse entrance animation */
.glass-card.pulse-enter{
  animation:pulseEntrance 0.6s var(--ease-reveal) forwards,gentleFloat 6s ease-in-out 0.6s infinite;
}

@keyframes pulseEntrance{
  0%{transform:scale(1);opacity:0.9}
  50%{transform:scale(1.03);opacity:1}
  100%{transform:scale(1);opacity:1}
}

/* Vector Illustrations */
.vector-illus{
  display:block;
  margin:calc(var(--baseline) * 3) auto;
  max-width:180px;
  height:auto;
}

.vector-illus line,
.vector-illus path,
.vector-illus circle{
  stroke-dasharray:500;
  stroke-dashoffset:500;
  transition:stroke-dashoffset 2.5s var(--ease-glass);
}

.vector-illus.drawn line,
.vector-illus.drawn path,
.vector-illus.drawn circle{
  stroke-dashoffset:0;
}

.scale-illus{
  max-width:160px;
}

.hourglass-illus{
  max-width:100px;
}

/* Chapter 4: Collision */
.collision-text{
  font-family:'DM Sans',sans-serif;
  font-size:clamp(1.1rem,1.5vw,1.35rem);
  font-weight:400;
  line-height:1.7;
  color:var(--charcoal-velvet);
  max-width:520px;
}

.pulse-word{
  display:inline-block;
  color:var(--peach-glow);
  font-weight:500;
  animation:pulseWord 2s ease-in-out infinite;
}

@keyframes pulseWord{
  0%,100%{transform:scale(1);opacity:0.9}
  50%{transform:scale(1.06);opacity:1}
}

/* Chapter 5: Dissolution */
.ch5{
  background:transparent;
}

.ch5 .chapter-num,
.ch5 .chapter-heading{
  font-family:'IBM Plex Mono',monospace;
  font-weight:400;
  letter-spacing:0.04em;
}

.ch5 .chapter-heading{
  font-size:clamp(1.5rem,3vw,2.5rem);
}

.dissolution-text{
  font-family:'IBM Plex Mono',monospace;
  font-size:clamp(0.9rem,1.1vw,1.1rem);
  font-weight:400;
  line-height:1.7;
  letter-spacing:0.02em;
  color:var(--charcoal-velvet);
  opacity:0.3;
  max-width:520px;
}

/* ========== PLANE C: Frosted Glass Panels ========== */
.plane-c{
  position:fixed;
  top:0;
  right:0;
  width:38.2%;
  height:100vh;
  z-index:2;
  pointer-events:none;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:calc(var(--baseline) * 2);
  padding:40px 32px;
}

.frost-panel{
  backdrop-filter:blur(12px) saturate(1.4);
  -webkit-backdrop-filter:blur(12px) saturate(1.4);
  background:var(--glass-white);
  border:1px solid rgba(212,160,160,0.2);
  border-radius:20px;
  padding:32px 28px;
  box-shadow:0 12px 40px rgba(44,42,53,0.06);
  opacity:0;
  transform:translateX(60px);
  transition:opacity 0.8s var(--ease-glass),transform 0.8s var(--ease-glass);
  will-change:backdrop-filter,transform;
}

.frost-panel.visible{
  opacity:1;
  transform:translateX(0);
  pointer-events:auto;
}

.frost-label{
  font-family:'IBM Plex Mono',monospace;
  font-size:clamp(0.65rem,0.8vw,0.75rem);
  font-weight:400;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--sage-glass);
  display:block;
  margin-bottom:16px;
}

.frost-title{
  font-family:'Barlow Condensed',sans-serif;
  font-size:clamp(2.5rem,5vw,4rem);
  font-weight:300;
  letter-spacing:0.04em;
  text-transform:uppercase;
  color:var(--sage-glass);
  line-height:1;
  margin-bottom:16px;
  opacity:0.6;
}

.frost-text{
  font-family:'IBM Plex Mono',monospace;
  font-size:clamp(0.85rem,1vw,1rem);
  font-weight:400;
  line-height:1.6;
  letter-spacing:0.02em;
  color:var(--sage-glass);
}

/* ========== WAVE DIVIDERS ========== */
.wave-divider{
  width:100vw;
  position:relative;
  left:calc(-5.9vw);
  height:60px;
  overflow:visible;
  margin:calc(var(--baseline) * 2) 0;
}

.wave-divider svg{
  width:100%;
  height:100%;
  display:block;
}

.wave-path{
  opacity:0.6;
}

/* ========== ANIMATIONS ========== */

/* Pulse attention pattern */
@keyframes pulse{
  0%,100%{transform:scale(1);opacity:0.9}
  50%{transform:scale(1.03);opacity:1}
}

/* ========== RESPONSIVE ========== */
@media(max-width:900px){
  .plane-b{
    width:85%;
    margin-left:7.5%;
  }
  .plane-c{
    position:relative;
    width:90%;
    margin:0 auto;
    height:auto;
    padding:40px 20px;
  }
  .frost-panel{
    opacity:1;
    transform:translateX(0);
  }
  .wave-divider{
    left:calc(-7.5vw);
  }
}

@media(max-width:600px){
  .plane-b{
    width:90%;
    margin-left:5%;
  }
  .hero-split{
    font-size:clamp(3rem,14vw,5rem);
  }
  .glass-card{
    width:100%;
  }
  .plane-c{
    width:95%;
    padding:24px 16px;
  }
}