:root {
  color-scheme: dark;
  --ink: #f4f5ff;
  --muted: #9aa3c6;
  --dim: #60688d;
  --night: #0b0c18;
  --deep: #111329;
  --blue: #748dff;
  --ice: #dce7ff;
  --coral: #ff6f61;
  --yellow: #f4ce6b;
  --line: rgba(180, 194, 255, 0.18);
  --safe-top: max(20px, env(safe-area-inset-top));
  --safe-right: max(20px, env(safe-area-inset-right));
  --safe-bottom: max(18px, env(safe-area-inset-bottom));
  --safe-left: max(20px, env(safe-area-inset-left));
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
  background: var(--night);
}

body {
  min-width: 320px;
  overflow-x: hidden;
  color: var(--ink);
  font-family: ui-monospace, "SFMono-Regular", "Cascadia Code", "Liberation Mono", monospace;
}

button,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 4px;
}

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

.experience {
  position: relative;
  display: grid;
  grid-template-rows: auto minmax(350px, 56vh) minmax(300px, 44vh);
  min-height: 100vh;
  min-height: 100svh;
  isolation: isolate;
  background:
    radial-gradient(circle at 73% 6%, rgba(116, 141, 255, 0.12), transparent 31rem),
    var(--night);
}

.experience::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9;
  opacity: 0.42;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.09'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

.masthead {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  padding: var(--safe-top) var(--safe-right) 1rem var(--safe-left);
  border-bottom: 1px solid var(--line);
}

.identity h1,
.identity p,
.privacy {
  margin: 0;
}

.identity h1 {
  margin-top: 0.35rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.45rem, 2.6vw, 2.55rem);
  font-weight: 400;
  letter-spacing: -0.035em;
}

.eyebrow,
.privacy,
.floor-rule,
.section-heading,
.legend,
.progress,
.intro-number {
  font-size: 0.68rem;
  line-height: 1.4;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow {
  color: var(--blue);
}

.privacy {
  max-width: 12rem;
  padding-top: 0.25rem;
  color: var(--muted);
  text-align: right;
}

.writing-floor {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  padding: 1rem var(--safe-right) 1.2rem var(--safe-left);
  background: linear-gradient(180deg, rgba(18, 20, 42, 0.88), rgba(11, 12, 24, 0.96));
  transition: transform 800ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 800ms ease;
}

.floor-rule {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--dim);
}

.floor-rule i {
  flex: 1;
  height: 1px;
  background: var(--line);
}

#writingStatus {
  color: var(--yellow);
}

.prompt-line {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  margin-top: 1.15rem;
}

.prompt-line p {
  max-width: 52rem;
  margin: 0;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(0.95rem, 1.4vw, 1.15rem);
  line-height: 1.45;
}

.text-button,
.reset-button {
  min-height: 44px;
  padding: 0 0.2rem;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: transparent;
  color: var(--blue);
  white-space: nowrap;
  cursor: pointer;
}

.draft-shell {
  position: relative;
  flex: 1;
  min-height: 10rem;
  margin-top: 0.7rem;
}

#draft,
.surviving-draft {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0.35rem 0 0;
  border: 0;
  resize: none;
  overflow: auto;
  background: transparent;
  color: var(--ink);
  caret-color: var(--coral);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.65rem, 4.1vw, 4.45rem);
  font-weight: 400;
  line-height: 1.13;
  letter-spacing: -0.035em;
}

#draft::placeholder {
  color: rgba(154, 163, 198, 0.28);
}

.surviving-draft {
  position: absolute;
  inset: 0;
  display: none;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.2rem;
}

.progress {
  margin: 0;
  color: var(--dim);
}

.reveal-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  min-height: 48px;
  padding: 0 1.1rem;
  border: 1px solid var(--blue);
  background: var(--blue);
  color: #090b18;
  cursor: pointer;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.reveal-button:not(:disabled):hover {
  transform: translateY(-2px);
  background: var(--ice);
}

.reveal-button:disabled {
  border-color: var(--line);
  background: transparent;
  color: var(--dim);
  cursor: not-allowed;
}

.reveal-button kbd {
  padding: 0.15rem 0.3rem;
  border: 1px solid currentColor;
  border-radius: 2px;
  font-size: 0.7rem;
}

.reset-button {
  color: var(--yellow);
}

.lower-room {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 300px;
  padding: 0.9rem var(--safe-right) var(--safe-bottom) var(--safe-left);
  overflow: hidden;
  border-top: 1px solid rgba(116, 141, 255, 0.45);
  background:
    linear-gradient(180deg, rgba(116, 141, 255, 0.06), transparent 32%),
    #080916;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--blue);
}

.section-heading p {
  margin: 0;
}

#sectionNote {
  max-width: 33rem;
  color: var(--dim);
  text-align: right;
  letter-spacing: 0.06em;
  text-transform: none;
}

.structure-wrap {
  position: relative;
  min-height: 210px;
}

#structure {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 210px;
  overflow: visible;
}

.grid path {
  fill: none;
  stroke: rgba(180, 194, 255, 0.07);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.ground-line {
  fill: none;
  stroke: rgba(220, 231, 255, 0.42);
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}

.ground-label {
  fill: var(--dim);
  font-family: ui-monospace, monospace;
  font-size: 9px;
  letter-spacing: 0.16em;
}

.struct-column {
  stroke: url(#columnGlow);
  stroke-width: 3.2;
  vector-effect: non-scaling-stroke;
  opacity: 0;
  animation: lower-column 560ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.struct-cap {
  fill: var(--ice);
  opacity: 0;
  animation: appear 300ms ease forwards;
}

.pause-beam {
  fill: none;
  stroke: var(--yellow);
  stroke-width: 1.4;
  stroke-dasharray: 5 5;
  vector-effect: non-scaling-stroke;
  opacity: 0.58;
}

.revision-footing {
  fill: rgba(255, 111, 97, 0.18);
  stroke: rgba(255, 111, 97, 0.55);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.revision-brace {
  stroke: var(--coral);
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
  filter: url(#softGlow);
  opacity: 0;
  stroke-dasharray: 320;
  stroke-dashoffset: 320;
}

.revision-word {
  fill: #ffc1bb;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 25px;
  font-style: italic;
  font-weight: 600;
  opacity: 0;
}

.revision-anchor,
.revision-index {
  fill: var(--coral);
  opacity: 0;
}

.revision-index {
  font-family: ui-monospace, monospace;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.empty-structure {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--dim);
  font-size: 0.73rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.empty-structure[hidden] {
  display: none !important;
}

.empty-structure p {
  margin: 2rem 0 0;
}

.cursor-beam {
  position: absolute;
  top: 16%;
  bottom: 22%;
  width: 1px;
  background: linear-gradient(transparent, var(--blue), transparent);
  animation: breathe 1.8s ease-in-out infinite;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  color: var(--dim);
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.legend i {
  display: inline-block;
  width: 1.4rem;
  height: 2px;
}

.legend-run {
  background: var(--blue);
}

.legend-pause {
  border-top: 1px dashed var(--yellow);
}

.legend-revision {
  background: var(--coral);
  opacity: 0.5;
}

.intro-card {
  position: fixed;
  z-index: 20;
  top: 50%;
  left: 50%;
  width: min(92vw, 44rem);
  transform: translate(-50%, -50%);
  padding: clamp(1.4rem, 4vw, 3.3rem);
  border: 1px solid rgba(180, 194, 255, 0.26);
  background: rgba(11, 12, 24, 0.94);
  box-shadow: 0 2rem 8rem rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(18px);
  transition: opacity 420ms ease, transform 420ms cubic-bezier(0.22, 1, 0.36, 1);
}

.intro-card::before {
  content: "";
  position: absolute;
  inset: 0.8rem;
  border: 1px solid rgba(116, 141, 255, 0.12);
  pointer-events: none;
}

.intro-number {
  margin: 0 0 2.3rem;
  color: var(--blue);
}

.intro-card h2 {
  max-width: 11ch;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 400;
  line-height: 0.88;
  letter-spacing: -0.065em;
}

.intro-card > p:not(.intro-number) {
  max-width: 35rem;
  margin: 2rem 0;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.45;
}

.intro-card button {
  min-height: 50px;
  padding: 0 1.25rem;
  border: 0;
  background: var(--coral);
  color: #160c14;
  font-weight: 700;
  cursor: pointer;
}

.experience[data-state="writing"] .intro-card,
.experience[data-state="revealed"] .intro-card {
  opacity: 0;
  transform: translate(-50%, -46%) scale(0.98);
  pointer-events: none;
}

.experience[data-state="intro"]::after {
  content: "";
  position: fixed;
  z-index: 15;
  inset: 0;
  background: rgba(3, 4, 12, 0.64);
  backdrop-filter: blur(5px);
}

.experience[data-state="revealed"] {
  grid-template-rows: auto minmax(270px, 35vh) minmax(470px, 65vh);
}

.experience[data-state="revealed"] .writing-floor {
  transform: translateY(-1.65rem);
  transform-origin: 50% 100%;
  box-shadow: 0 2rem 6rem rgba(0, 0, 0, 0.55);
}

.experience[data-state="revealed"] .lower-room {
  margin-top: -1.6rem;
  padding-top: 2.4rem;
}

.experience[data-state="revealed"] #draft {
  display: none;
}

.experience[data-state="revealed"] .surviving-draft {
  display: block;
  overflow: hidden;
  font-size: clamp(1.55rem, 3.25vw, 3.55rem);
  line-height: 1.06;
}

.experience[data-state="revealed"] .prompt-line,
.experience[data-state="revealed"] .progress,
.experience[data-state="revealed"] .reveal-button {
  display: none;
}

.experience[data-state="revealed"] .revision-brace {
  animation: draw-brace 920ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.experience[data-state="revealed"] .revision-word,
.experience[data-state="revealed"] .revision-anchor,
.experience[data-state="revealed"] .revision-index {
  animation: appear 600ms 520ms ease forwards;
}

.supported-phrase {
  position: relative;
  color: var(--ice);
  text-decoration: underline 0.12em var(--coral);
  text-underline-offset: 0.14em;
  text-decoration-skip-ink: none;
  text-shadow: 0 0 1.2rem rgba(255, 111, 97, 0.25);
}

.support-index {
  margin-left: 0.18em;
  color: var(--coral);
  font-family: ui-monospace, monospace;
  font-size: 0.28em;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0;
  vertical-align: top;
}

.experience[data-state="revealed"] .revision-footing {
  opacity: 0.08;
}

@keyframes lower-column {
  from { opacity: 0; transform: translateY(-24px); }
  to { opacity: 0.85; transform: translateY(0); }
}

@keyframes draw-brace {
  0% { opacity: 0; stroke-dashoffset: 320; }
  100% { opacity: 1; stroke-dashoffset: 0; }
}

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

@keyframes breathe {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

@media (max-width: 720px) {
  .experience,
  .experience {
    grid-template-rows: auto minmax(445px, 58svh) minmax(330px, 42svh);
  }

  .experience[data-state="revealed"] {
    grid-template-rows: auto auto minmax(350px, 50svh);
  }

  .experience[data-state="revealed"] .writing-floor {
    transform: translateY(-0.85rem);
  }

  .experience[data-state="revealed"] .lower-room {
    margin-top: -0.85rem;
    padding-top: 1.65rem;
  }

  .masthead {
    align-items: center;
    padding-bottom: 0.75rem;
  }

  .privacy {
    max-width: 8rem;
    font-size: 0.58rem;
  }

  .prompt-line {
    display: block;
    margin-top: 0.8rem;
  }

  .prompt-line p {
    font-size: 0.92rem;
  }

  .text-button {
    margin-top: 0.4rem;
  }

  .draft-shell {
    min-height: 14rem;
    margin-top: 0.25rem;
  }

  #draft,
  .surviving-draft {
    font-size: clamp(1.65rem, 7.7vw, 2.4rem);
    line-height: 1.08;
  }

  .experience[data-state="revealed"] .draft-shell {
    flex: none;
    min-height: 0;
    height: auto;
    margin: 0.8rem 0 1.15rem;
  }

  .experience[data-state="revealed"] .surviving-draft {
    position: relative;
    font-size: clamp(1.55rem, 7vw, 2.15rem);
    line-height: 1.08;
  }

  .controls {
    align-items: flex-end;
  }

  .progress {
    max-width: 9rem;
    font-size: 0.58rem;
  }

  .reveal-button {
    min-width: 10.5rem;
  }

  .reveal-button kbd {
    display: none;
  }

  .lower-room {
    min-height: 330px;
  }

  .section-heading {
    align-items: flex-start;
  }

  #sectionNote {
    max-width: 14rem;
    font-size: 0.56rem;
  }

  .structure-wrap,
  #structure {
    min-height: 235px;
  }

  .legend {
    gap: 0.4rem 1rem;
    font-size: 0.55rem;
  }

  .revision-word {
    font-size: 32px;
    font-weight: 700;
  }

  .revision-index {
    font-size: 18px;
  }

  .intro-card {
    width: calc(100vw - 1.5rem);
    padding: 1.5rem;
  }

  .intro-card h2 {
    font-size: clamp(3.2rem, 17vw, 5rem);
  }
}

@media (max-height: 720px) and (min-width: 721px) {
  .experience,
  .experience[data-state="revealed"] {
    grid-template-rows: auto minmax(300px, 57vh) minmax(260px, 43vh);
  }

  .prompt-line {
    margin-top: 0.55rem;
  }

  .draft-shell {
    margin-top: 0.3rem;
  }

  .intro-card h2 {
    font-size: 4.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    animation-delay: 0ms !important;
    transition-duration: 1ms !important;
  }
}