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

:root {
  --bg: oklch(99.2% 0.004 95);
  --bg-warm: oklch(97.5% 0.012 85);
  --ink: oklch(24% 0.02 265);
  --ink-muted: oklch(48% 0.02 265);
  --s-color: oklch(55% 0.24 28);
  --marder-color: oklch(55% 0.2 255);
  --focus: oklch(55% 0.2 255);

  --font-display: "Archivo Black", system-ui, sans-serif;
  --font-body: "Work Sans", system-ui, sans-serif;

  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);

  --motion-bg: 1s;
  --motion-fade-in: 0.65s;
  --motion-fade-out: 0.42s;
  --motion-expand-in: 0.58s;
  --motion-expand-out: 0.48s;
  --motion-scale-in: 0.62s;
  --motion-scale-out: 0.5s;
  --motion-panel-in: 0.55s;
  --motion-panel-out: 0.45s;
  --motion-contact-in: 0.52s;
  --motion-contact-out: 0.32s;
  --motion-back-in: 0.42s;
  --motion-back-out: 0.28s;

  --delay-fade-in: 0ms;
  --delay-expand-in: 140ms;
  --delay-scale-in: 180ms;
  --delay-panel-in: 300ms;
  --delay-contact-a-in: 380ms;
  --delay-contact-b-in: 470ms;
  --delay-back-in: 580ms;

  --delay-panel-out: 0ms;
  --delay-expand-out: 100ms;
  --delay-scale-out: 160ms;
  --delay-fade-out: 280ms;
}

html {
  font-size: 16px;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
  transition: background-color var(--motion-bg) var(--ease-out-expo);
}

body.is-revealed {
  background: var(--bg-warm);
}

.stage {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: clamp(1.5rem, 5vw, 3rem);
}

.card {
  width: min(100%, 52rem);
  text-align: center;
}

.hero-btn {
  appearance: none;
  border: 0;
  background: transparent;
  cursor: pointer;
  width: 100%;
  padding: clamp(1.25rem, 4vw, 2rem) clamp(1rem, 3vw, 1.5rem);
  border-radius: 1rem;
  color: var(--ink);
  font: inherit;
  container-type: inline-size;
  transition:
    transform 0.35s var(--ease-out-quint),
    background-color 0.35s var(--ease-out-quint),
    box-shadow 0.35s var(--ease-out-quint);
}

.hero-btn:hover {
  transform: scale(1.015);
  background: oklch(97% 0.008 95);
  box-shadow:
    0 0 0 1px oklch(90% 0.01 95),
    0 18px 40px -28px oklch(30% 0.04 265 / 0.35);
}

.hero-btn:active {
  transform: scale(0.992);
}

.hero-btn:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 6px;
}

.stage[data-state="contact"] .hero-btn {
  cursor: default;
  pointer-events: none;
  transform: none;
  background: transparent;
  box-shadow: none;
}

.hero-line {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.5vw, 4.25rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.03em;
  transition:
    font-size var(--motion-scale-out) var(--ease-out-expo),
    line-height var(--motion-scale-out) var(--ease-out-expo);
}

.stage[data-state="intro"] .hero-line {
  font-size: clamp(0.95rem, 5.4cqi, 4.25rem);
}

.stage[data-state="intro"][data-direction="back"] .hero-line {
  transition:
    font-size var(--motion-scale-out) var(--ease-out-expo) var(--delay-scale-out),
    line-height var(--motion-scale-out) var(--ease-out-expo) var(--delay-scale-out);
}

.stage[data-state="contact"] .hero-line {
  font-size: clamp(2rem, 9cqi, 5.5rem);
  line-height: 0.95;
  transition:
    font-size var(--motion-scale-in) var(--ease-out-quint) var(--delay-scale-in),
    line-height var(--motion-scale-in) var(--ease-out-quint) var(--delay-scale-in);
}

.phrase-fade--lead .phrase-fade-inner {
  padding-right: 0.25em;
}

.phrase-fade--tail {
  margin-left: 0;
}

.smarder {
  white-space: nowrap;
}

.s-expand {
  display: inline-block;
  vertical-align: bottom;
  transform: translateZ(0);
}

.s-core,
.s-rest {
  color: var(--s-color);
  font-weight: 400;
}

.s-rest {
  display: inline-grid;
  grid-template-columns: 0fr;
  vertical-align: bottom;
  opacity: 0;
  transition:
    grid-template-columns var(--motion-expand-out) var(--ease-out-quint),
    opacity calc(var(--motion-expand-out) * 0.75) var(--ease-out-quart);
}

.s-rest-text {
  overflow: hidden;
  white-space: nowrap;
  min-width: 0;
}

.stage[data-state="intro"][data-direction="back"] .s-rest {
  transition:
    grid-template-columns var(--motion-expand-out) var(--ease-out-quint) var(--delay-expand-out),
    opacity calc(var(--motion-expand-out) * 0.75) var(--ease-out-quart) var(--delay-expand-out);
}

.stage[data-state="contact"] .s-rest {
  grid-template-columns: 1fr;
  opacity: 1;
  transition:
    grid-template-columns var(--motion-expand-in) var(--ease-out-quint) var(--delay-expand-in),
    opacity calc(var(--motion-expand-in) * 0.75) var(--ease-out-quart) var(--delay-expand-in);
}

.marder-mark {
  color: var(--marder-color);
  font-weight: 400;
  letter-spacing: 0.01em;
}

.phrase-fade {
  display: inline-block;
  vertical-align: bottom;
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity var(--motion-fade-out) var(--ease-out-quart),
    transform var(--motion-fade-out) var(--ease-out-quart);
}

.phrase-fade-text {
  display: inline-grid;
  grid-template-columns: 1fr;
  vertical-align: bottom;
  transition: grid-template-columns var(--motion-fade-out) var(--ease-out-quint);
}

.phrase-fade-inner {
  overflow: hidden;
  white-space: nowrap;
  min-width: 0;
}

.stage[data-state="intro"][data-direction="back"] .phrase-fade {
  transition:
    opacity var(--motion-fade-out) var(--ease-out-quart) var(--delay-fade-out),
    transform var(--motion-fade-out) var(--ease-out-quart) var(--delay-fade-out);
}

.stage[data-state="intro"][data-direction="back"] .phrase-fade-text {
  transition:
    grid-template-columns var(--motion-fade-in) var(--ease-out-quint) var(--delay-fade-out);
}

.stage[data-state="contact"] .phrase-fade {
  opacity: 0;
  transform: translateY(-0.35rem);
  transition:
    opacity var(--motion-fade-in) var(--ease-out-quart) var(--delay-fade-in),
    transform var(--motion-fade-in) var(--ease-out-quart) var(--delay-fade-in);
}

.stage[data-state="contact"] .phrase-fade-text {
  grid-template-columns: 0fr;
  transition:
    grid-template-columns calc(var(--motion-fade-in) * 0.9) var(--ease-out-quint) var(--delay-fade-in);
}

.hero-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: clamp(1rem, 3vw, 1.5rem);
  font-size: clamp(0.72rem, 2vw, 0.82rem);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.hero-hint.phrase-fade {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-hint::after {
  content: "→";
  font-size: 1.1em;
  transition:
    transform 0.35s var(--ease-out-quint),
    opacity var(--motion-fade-out) var(--ease-out-quart);
}

.hero-btn:hover .hero-hint::after {
  transform: translateX(4px);
}

.stage[data-state="contact"] .hero-hint::after {
  opacity: 0;
  transition:
    transform 0.35s var(--ease-out-quint),
    opacity var(--motion-fade-in) var(--ease-out-quart) var(--delay-fade-in);
}

.contact-panel {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
  transform: translateY(0.5rem);
  text-align: left;
  transition:
    max-height var(--motion-panel-out) var(--ease-out-expo),
    opacity var(--motion-panel-out) var(--ease-out-quart),
    transform var(--motion-panel-out) var(--ease-out-quart);
}

.stage[data-state="intro"][data-direction="back"] .contact-panel {
  transition:
    max-height var(--motion-panel-out) var(--ease-out-expo) var(--delay-panel-out),
    opacity var(--motion-panel-out) var(--ease-out-quart) var(--delay-panel-out),
    transform var(--motion-panel-out) var(--ease-out-quart) var(--delay-panel-out);
}

.stage[data-state="contact"] .contact-panel {
  max-height: 24rem;
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  transition:
    max-height calc(var(--motion-panel-in) + 0.15s) var(--ease-out-quint) var(--delay-panel-in),
    opacity var(--motion-panel-in) var(--ease-out-quint) var(--delay-panel-in),
    transform var(--motion-panel-in) var(--ease-out-quint) var(--delay-panel-in);
}

.contact-panel[hidden] {
  display: block;
  visibility: hidden;
}

.stage[data-state="contact"] .contact-panel[hidden] {
  visibility: visible;
}

.contact-links {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: clamp(1.25rem, 3vw, 1.75rem);
  margin-top: clamp(2rem, 6vw, 3.5rem);
  width: 100%;
  max-width: 100%;
  container-type: inline-size;
}

.contact-link {
  display: grid;
  gap: 0.2rem;
  width: min(100%, fit-content);
  min-height: 2.75rem;
  text-decoration: none;
  color: inherit;
  padding: 0.5rem 0;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  font: inherit;
  text-align: left;
  cursor: pointer;
  -webkit-tap-highlight-color: oklch(55% 0.2 255 / 0.12);
  opacity: 0;
  transform: translateY(0.75rem);
  transition:
    opacity var(--motion-contact-out) var(--ease-out-expo),
    transform var(--motion-contact-out) var(--ease-out-expo),
    border-color 0.3s var(--ease-out-quint);
}

.stage[data-state="contact"] .contact-link {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity var(--motion-contact-in) var(--ease-out-expo),
    transform var(--motion-contact-in) var(--ease-out-expo),
    border-color 0.3s var(--ease-out-quint);
}

.stage[data-state="contact"] .contact-link:nth-child(1) {
  transition-delay: var(--delay-contact-a-in), var(--delay-contact-a-in), 0ms;
}

.stage[data-state="contact"] .contact-link:nth-child(2) {
  transition-delay: var(--delay-contact-b-in), var(--delay-contact-b-in), 0ms;
}

.contact-link:hover {
  border-color: oklch(82% 0.03 265);
  transform: translateX(4px);
}

.contact-link:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

.link-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.link-value {
  font-family: var(--font-display);
  font-size: clamp(1rem, 6.8cqi, 2rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}

.copy-toast {
  position: fixed;
  z-index: 100;
  pointer-events: none;
  padding: 0.28rem 0.48rem;
  border-radius: 0.3rem;
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  white-space: nowrap;
  color: oklch(58% 0.02 265);
  background: oklch(97.5% 0.006 95);
  border: 1px solid oklch(91% 0.008 95);
  box-shadow: 0 6px 18px -12px oklch(30% 0.02 265 / 0.14);
  opacity: 0;
  transform: translate(10px, 10px) translateY(3px);
  transition:
    opacity 0.35s var(--ease-out-quart),
    transform 0.35s var(--ease-out-quart);
}

.copy-toast.is-visible {
  opacity: 1;
  transform: translate(10px, 10px) translateY(0);
}

.back-btn {
  appearance: none;
  border: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  min-width: 44px;
  min-height: 44px;
  margin-top: clamp(2.5rem, 7vw, 4rem);
  margin-right: auto;
  padding: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--ink-muted);
  cursor: pointer;
  -webkit-tap-highlight-color: oklch(55% 0.2 255 / 0.12);
  opacity: 0;
  transition:
    color 0.3s var(--ease-out-quint),
    transform 0.3s var(--ease-out-quint),
    background-color 0.3s var(--ease-out-quint),
    opacity var(--motion-back-out) var(--ease-out-quart);
}

.stage[data-state="contact"] .back-btn {
  opacity: 1;
  transition:
    color 0.3s var(--ease-out-quint),
    transform 0.3s var(--ease-out-quint),
    background-color 0.3s var(--ease-out-quint),
    opacity var(--motion-back-in) var(--ease-out-quart) var(--delay-back-in);
}

.back-btn:hover {
  color: var(--ink);
  background: oklch(95% 0.008 95);
  transform: translateX(-3px);
}

.back-btn:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --motion-bg: 0.01ms;
    --motion-fade-in: 0.01ms;
    --motion-fade-out: 0.01ms;
    --motion-expand-in: 0.01ms;
    --motion-expand-out: 0.01ms;
    --motion-scale-in: 0.01ms;
    --motion-scale-out: 0.01ms;
    --motion-panel-in: 0.01ms;
    --motion-panel-out: 0.01ms;
    --motion-contact-in: 0.01ms;
    --motion-contact-out: 0.01ms;
    --motion-back-in: 0.01ms;
    --motion-back-out: 0.01ms;
    --delay-fade-in: 0ms;
    --delay-expand-in: 0ms;
    --delay-scale-in: 0ms;
    --delay-panel-in: 0ms;
    --delay-contact-a-in: 0ms;
    --delay-contact-b-in: 0ms;
    --delay-back-in: 0ms;
    --delay-panel-out: 0ms;
    --delay-expand-out: 0ms;
    --delay-scale-out: 0ms;
    --delay-fade-out: 0ms;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  .stage[data-state="contact"] .back-btn {
    opacity: 1;
  }
}