/* ============================================================
   papsbot — experience.css
   Immersive home: scroll-driven motion, modern CSS, WebGL stage.
   Brand tokens from tokens.css. Operator-grade, not AI sludge.
   ============================================================ */

@property --xp-glow {
  syntax: "<number>";
  inherits: false;
  initial-value: 0;
}

@property --xp-shift {
  syntax: "<percentage>";
  inherits: false;
  initial-value: 0%;
}

.xp-main {
  padding: 0;
}

.xp {
  --xp-stage-max: 1180px;
  position: relative;
  isolation: isolate;
}

.xp-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: calc(var(--z-nav) + 1);
  background: transparent;
  pointer-events: none;
}

.xp-progress__fill {
  display: block;
  height: 100%;
  width: 100%;
  transform-origin: left center;
  transform: scaleX(0);
  background: linear-gradient(
    90deg,
    color-mix(in oklab, var(--signal) 70%, transparent),
    var(--signal)
  );
  will-change: transform;
}

.xp-stage {
  width: min(100% - 2 * var(--s-4), var(--xp-stage-max));
  margin-inline: auto;
}

.xp-section {
  padding-block: clamp(4.5rem, 10vw, 7.5rem);
  position: relative;
  scroll-margin-top: calc(var(--nav-h) + 12px);
}

.xp-hero {
  scroll-margin-top: 0;
}

.xp-section__eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--t-12);
  font-weight: 650;
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: var(--s-3);
}

.xp-section__title {
  font-size: clamp(1.75rem, 3.6vw, 2.75rem);
  font-weight: 750;
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-tight);
  margin: 0 0 var(--s-3);
  text-wrap: balance;
  max-width: 18ch;
}

.xp-section__lead {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: var(--lh-relaxed);
  color: var(--ink-55);
  max-width: 52ch;
  margin: 0 0 var(--s-5);
  text-wrap: pretty;
}

/* ---- Scroll / IO reveals ---- */
.xp-reveal {
  opacity: 1;
  transform: none;
}

@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .xp-reveal {
      animation: xp-rise linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 35%;
    }

    .xp-reveal--late {
      animation-range: entry 10% entry 45%;
    }

    .xp-reveal--stagger > * {
      animation: xp-rise linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 40%;
    }

    .xp-reveal--stagger > *:nth-child(2) { animation-range: entry 8% entry 48%; }
    .xp-reveal--stagger > *:nth-child(3) { animation-range: entry 16% entry 56%; }
    .xp-reveal--stagger > *:nth-child(4) { animation-range: entry 24% entry 64%; }

    .xp-hero__canvas-wrap {
      animation: xp-hero-parallax linear both;
      animation-timeline: view();
      animation-range: exit 0% exit 100%;
    }
  }
}

@keyframes xp-hero-parallax {
  to {
    transform: translateY(12%);
    opacity: 0.35;
  }
}

@keyframes xp-rise {
  from {
    opacity: 0;
    transform: translateY(1.25rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.xp--io-fallback .xp-reveal {
  opacity: 0;
  transform: translateY(1rem);
  transition:
    opacity 480ms var(--ease-out),
    transform 480ms var(--ease-out);
}

.xp--io-fallback .xp-reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .xp-reveal,
  .xp--io-fallback .xp-reveal {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
    transition: none !important;
  }
}

/* ---- Hero ---- */
.xp-hero {
  position: relative;
  min-height: min(100svh, 920px);
  display: grid;
  align-items: end;
  padding-block: calc(var(--nav-h) + var(--s-6)) var(--s-6);
  overflow: clip;
}

.xp-hero__canvas-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(
      120% 80% at 70% 20%,
      color-mix(in oklab, var(--signal) 12%, transparent),
      transparent 55%
    ),
    linear-gradient(
      165deg,
      var(--paper-subtle) 0%,
      var(--paper) 45%,
      color-mix(in oklab, var(--signal-muted) 80%, var(--paper)) 100%
    );
}

.xp-hero__canvas-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      to top,
      var(--paper) 0%,
      color-mix(in oklab, var(--paper) 55%, transparent) 28%,
      transparent 55%
    ),
    linear-gradient(
      to right,
      color-mix(in oklab, var(--paper) 88%, transparent) 0%,
      transparent 42%
    );
  pointer-events: none;
}

#signal-field {
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 700ms var(--ease-out);
}

#signal-field.signal-field--live {
  opacity: 1;
}

#signal-field.signal-field--static {
  opacity: 0;
}

.xp-hero__content {
  position: relative;
  z-index: 1;
  width: min(100% - 2 * var(--s-4), var(--xp-stage-max));
  margin-inline: auto;
  display: grid;
  gap: var(--s-5);
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: end;
}

@media (max-width: 900px) {
  .xp-hero__content {
    grid-template-columns: 1fr;
  }
}

.xp-brand {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--ink);
  margin: 0 0 var(--s-3);
  display: flex;
  align-items: baseline;
  gap: 0.35em;
}

.xp-brand__dot {
  width: 0.42em;
  height: 0.42em;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px var(--signal-soft);
  flex-shrink: 0;
  align-self: center;
}

@media (prefers-reduced-motion: no-preference) {
  .xp-brand__dot {
    animation: xp-pulse 2.8s var(--ease-out) infinite;
  }
}

@keyframes xp-pulse {
  0%, 100% { box-shadow: 0 0 0 3px var(--signal-soft); transform: scale(1); }
  50% { box-shadow: 0 0 0 7px color-mix(in oklab, var(--signal-soft) 40%, transparent); transform: scale(1.05); }
}

.xp-hero__title {
  font-size: clamp(2.15rem, 5.5vw, 3.75rem);
  font-weight: 750;
  line-height: 1.05;
  letter-spacing: var(--ls-tight);
  margin: 0 0 var(--s-4);
  max-width: 14ch;
  text-wrap: balance;
}

.xp-hero__title em {
  font-style: italic;
  font-weight: 600;
  color: var(--signal);
}

.xp-hero__lead {
  font-size: clamp(1.05rem, 1.7vw, 1.25rem);
  line-height: var(--lh-relaxed);
  color: var(--ink-55);
  max-width: 42ch;
  margin: 0 0 var(--s-5);
  text-wrap: pretty;
}

.xp-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
}

.xp-hero__aside {
  justify-self: end;
  width: min(100%, 340px);
}

@media (max-width: 900px) {
  .xp-hero__aside {
    justify-self: start;
    width: min(100%, 420px);
  }
}

/* Terminal / process panel */
.xp-term {
  background: color-mix(in oklab, var(--paper-elevated) 92%, var(--ink));
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: var(--t-12);
  line-height: 1.55;
}

[data-theme="dark"] .xp-term,
:root:not([data-theme="light"]) .xp-term {
  background: color-mix(in oklab, var(--paper-elevated) 96%, black);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .xp-term {
    background: var(--paper-elevated);
  }
}

.xp-term__chrome {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-2);
  padding: 10px 14px;
  border-bottom: 1px solid var(--rule);
  background: var(--surface-inset);
}

.xp-term__dots {
  display: flex;
  gap: 6px;
}

.xp-term__dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--rule-strong);
}

.xp-term__dots span:nth-child(2) {
  background: color-mix(in oklab, var(--signal) 55%, var(--rule-strong));
}

.xp-term__title {
  color: var(--ink-55);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  font-size: var(--t-11);
}

.xp-term__body {
  padding: 14px 16px 16px;
  color: var(--ink-80);
  min-height: 9.5rem;
}

.xp-term__meta {
  color: var(--signal);
  margin-bottom: 10px;
  font-weight: 650;
}

.xp-term__line {
  opacity: 0.92;
}

@media (prefers-reduced-motion: no-preference) {
  .xp-term__line {
    animation: xp-line-in 420ms var(--ease-out) both;
    animation-delay: calc(var(--i, 0) * 70ms);
  }
}

@keyframes xp-line-in {
  from { opacity: 0; transform: translateX(-6px); }
  to { opacity: 0.92; transform: none; }
}

.xp-term__prompt {
  color: var(--ink-35);
  margin-top: 12px;
}

.xp-term__prompt::after {
  content: "█";
  color: var(--signal);
  margin-left: 2px;
}

@media (prefers-reduced-motion: no-preference) {
  .xp-term__prompt::after {
    animation: xp-blink 1.1s steps(1) infinite;
  }
}

@keyframes xp-blink {
  50% { opacity: 0; }
}

.xp-hero__scroll {
  position: absolute;
  bottom: var(--s-4);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  font-family: var(--font-mono);
  font-size: var(--t-11);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--ink-35);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.xp-hero__scroll-bar {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, var(--signal), transparent);
  transform-origin: top;
}

@media (prefers-reduced-motion: no-preference) {
  .xp-hero__scroll-bar {
    animation: xp-scroll-hint 2s var(--ease-out) infinite;
  }
}

@keyframes xp-scroll-hint {
  0% { transform: scaleY(0.35); opacity: 0.3; }
  40% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(0.35); opacity: 0.3; }
}

/* ---- Services ---- */
.xp-services {
  background: var(--paper-subtle);
  border-block: 1px solid var(--rule);
}

.xp-service-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
  gap: var(--s-5);
  align-items: start;
}

@media (max-width: 800px) {
  .xp-service-layout {
    grid-template-columns: 1fr;
  }
}

.xp-service-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--rule);
}

.xp-service-row {
  display: grid;
  grid-template-columns: 3rem 1fr auto;
  gap: var(--s-3);
  align-items: baseline;
  padding: var(--s-4) 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
  transition: background var(--duration-fast) var(--ease-out);
  border-radius: var(--r-sm);
}

.xp-service-row:hover,
.xp-service-row:focus-visible {
  background: color-mix(in oklab, var(--signal-soft) 55%, transparent);
  color: inherit;
  outline: none;
}

.xp-service-row:focus-visible {
  box-shadow: var(--shadow-focus);
}

.xp-service-row__n {
  font-family: var(--font-mono);
  font-size: var(--t-13);
  font-weight: 700;
  color: var(--signal);
}

.xp-service-row__title {
  font-size: var(--t-20);
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: var(--ls-snug);
}

.xp-service-row__text {
  margin: 0;
  color: var(--ink-55);
  font-size: var(--t-14);
  max-width: 52ch;
}

.xp-service-row__go {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  color: var(--signal);
  opacity: 0.7;
  transition: opacity var(--duration-fast), transform var(--duration-fast);
}

.xp-service-row:hover .xp-service-row__go,
.xp-service-row:focus-visible .xp-service-row__go {
  opacity: 1;
  transform: translateX(3px);
}

.xp-service-rail {
  position: sticky;
  top: calc(var(--nav-h) + var(--s-4));
}

.xp-service-rail .xp-term__body {
  min-height: 7rem;
}

#xp-service-hint {
  color: var(--ink-80);
}

/* ---- Process ---- */
.xp-process-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
  gap: var(--s-5);
  align-items: start;
}

@media (max-width: 860px) {
  .xp-process-grid {
    grid-template-columns: 1fr;
  }
}

.xp-process-steps {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}

.xp-process-step {
  padding: var(--s-4);
  border-left: 2px solid var(--rule);
  transition:
    border-color var(--duration-normal) var(--ease-out),
    background var(--duration-normal) var(--ease-out);
}

.xp-process-step.is-active {
  border-left-color: var(--signal);
  background: color-mix(in oklab, var(--signal-soft) 40%, transparent);
}

.xp-process-step__step {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  font-weight: 700;
  color: var(--signal);
  display: block;
  margin-bottom: var(--s-2);
}

.xp-process-step__title {
  font-size: var(--t-22);
  font-weight: 700;
  margin: 0 0 var(--s-2);
}

.xp-process-step__text {
  margin: 0;
  color: var(--ink-55);
  max-width: 48ch;
}

.xp-process-panel {
  position: sticky;
  top: calc(var(--nav-h) + var(--s-4));
}

/* ---- Scenarios ---- */
.xp-scenarios {
  background: var(--paper-subtle);
  border-block: 1px solid var(--rule);
}

.xp-scenario-tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin-bottom: var(--s-4);
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.xp-scenario-tab {
  appearance: none;
  border: 1px solid var(--rule);
  background: var(--paper-elevated);
  color: var(--ink-80);
  font-family: var(--font-ui);
  font-size: var(--t-13);
  font-weight: 650;
  letter-spacing: var(--ls-snug);
  text-transform: none;
  padding: 8px 12px;
  border-radius: var(--r-sm);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  max-width: 16rem;
  overflow: hidden;
  text-overflow: ellipsis;
  transition:
    border-color var(--duration-fast),
    background var(--duration-fast),
    color var(--duration-fast);
}

.xp-scenario-tab:hover {
  border-color: var(--rule-strong);
}

.xp-scenario-tab.is-active,
.xp-scenario-tab[aria-selected="true"] {
  border-color: var(--signal);
  background: var(--signal-soft);
  color: var(--signal);
}

.xp-scenario-tab:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.xp-scenario-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: var(--s-5);
  align-items: start;
}

@media (max-width: 800px) {
  .xp-scenario-panel {
    grid-template-columns: 1fr;
  }
}

.xp-scenario-stage {
  view-transition-name: xp-scenario;
}

::view-transition-old(xp-scenario),
::view-transition-new(xp-scenario) {
  animation-duration: 280ms;
  animation-timing-function: var(--ease-out);
}

.xp-scenario-panel[hidden] {
  display: none !important;
}

.xp-scenario-kicker {
  font-family: var(--font-mono);
  font-size: var(--t-11);
  font-weight: 700;
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--signal);
  margin: 0 0 var(--s-2);
}

.xp-scenario-title {
  font-size: var(--t-24);
  font-weight: 700;
  margin: 0 0 var(--s-3);
}

.xp-scenario-block {
  margin-bottom: var(--s-3);
}

.xp-scenario-block h4 {
  font-family: var(--font-mono);
  font-size: var(--t-11);
  font-weight: 650;
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--ink-35);
  margin: 0 0 6px;
}

.xp-scenario-block p {
  margin: 0;
  color: var(--ink-80);
  font-size: var(--t-15, var(--t-14));
  max-width: 52ch;
}

.xp-scenario-log .xp-term__body {
  min-height: 11rem;
}

.xp-scenario-log .xp-term__line--ok {
  color: var(--signal);
}

.xp-scenario-log .xp-term__line--dim {
  color: var(--ink-35);
}

/* ---- Trust ---- */
.xp-trust {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3) var(--s-5);
  padding: var(--s-4) 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin-block: var(--s-2);
}

.xp-trust__item {
  font-size: var(--t-14);
  color: var(--ink-80);
  max-width: 36ch;
  position: relative;
  padding-left: 1.15rem;
}

.xp-trust__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--signal);
}

/* ---- Learn + FAQ ---- */
.xp-learn-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: var(--s-5);
  align-items: start;
}

@media (max-width: 860px) {
  .xp-learn-grid {
    grid-template-columns: 1fr;
  }
}

.xp-learn-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--ink-80);
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 52ch;
}

.xp-faq {
  max-width: 720px;
}

.xp-faq__title {
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 750;
  letter-spacing: var(--ls-snug);
  margin: 0 0 var(--s-3);
  max-width: none;
}

.xp-faq details {
  border-bottom: 1px solid var(--rule);
  padding: var(--s-3) 0;
}

@supports (interpolate-size: allow-keywords) {
  .xp-faq details::details-content {
    transition:
      content-visibility 320ms allow-discrete,
      height 320ms var(--ease-out),
      opacity 240ms var(--ease-out);
    opacity: 0;
    height: 0;
    overflow: clip;
  }

  .xp-faq details[open]::details-content {
    opacity: 1;
    height: auto;
  }

  @starting-style {
    .xp-faq details[open]::details-content {
      opacity: 0;
      height: 0;
    }
  }
}

.xp-faq summary {
  cursor: pointer;
  font-weight: 650;
  font-size: var(--t-16);
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: var(--s-3);
  color: var(--ink);
}

.xp-faq summary::-webkit-details-marker {
  display: none;
}

.xp-faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--signal);
  flex-shrink: 0;
}

.xp-faq details[open] summary::after {
  content: "−";
}

.xp-faq summary:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--r-xs);
}

.xp-faq p {
  margin: var(--s-2) 0 0;
  color: var(--ink-55);
  max-width: 62ch;
}

.xp-faq__more {
  margin-top: var(--s-4);
  font-weight: 600;
}

/* ---- Closing CTA ---- */
.xp-cta {
  text-align: center;
  padding-block: clamp(5rem, 12vw, 8rem);
  background:
    radial-gradient(
      80% 60% at 50% 100%,
      color-mix(in oklab, var(--signal) 10%, transparent),
      transparent 60%
    ),
    var(--paper-subtle);
  border-top: 1px solid var(--rule);
}

.xp-cta__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 750;
  letter-spacing: var(--ls-snug);
  max-width: 22ch;
  margin: 0 auto var(--s-3);
  text-wrap: balance;
}

.xp-cta__lead {
  color: var(--ink-55);
  max-width: 48ch;
  margin: 0 auto var(--s-5);
  text-wrap: pretty;
}

.xp-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  justify-content: center;
}

/* ---- Section nav (in-page) ---- */
.xp-toc {
  position: fixed;
  right: max(12px, calc((100vw - var(--xp-stage-max)) / 2 - 48px));
  top: 50%;
  transform: translateY(-50%);
  z-index: 40;
  display: none;
  flex-direction: column;
  gap: 10px;
}

@media (min-width: 1280px) {
  .xp-toc {
    display: flex;
  }
}

.xp-toc a {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--rule-strong);
  display: block;
  transition: background var(--duration-fast), transform var(--duration-fast);
}

.xp-toc a:hover,
.xp-toc a:focus-visible {
  background: var(--signal);
  transform: scale(1.35);
  outline: none;
}

.xp-toc a:focus-visible {
  box-shadow: var(--shadow-focus);
}

/* ---- Container query polish on service rows ---- */
@container (min-width: 640px) {
  .xp-service-row {
    grid-template-columns: 3.5rem 1fr auto;
  }
}

.xp-service-list {
  container-type: inline-size;
}