/* CONFIG: Theme */
:root {
  --color-bg: #0a0a0a;
  --color-bg-elevated: rgba(255, 255, 255, 0.05);
  --color-text: #ffffff;
  --color-muted: rgba(255, 255, 255, 0.64);
  --color-border: rgba(255, 255, 255, 0.14);
  --color-error: #ff6b6b;
  --color-button-text: #0a0a0a;
  --font-primary: "Inter", sans-serif;
  --screen-padding: clamp(1.5rem, 4vw, 3rem);
  --question-size: clamp(1.8rem, 4vw, 3rem);
  --body-size: 1rem;
  --transition-duration: 300ms;
  --transition-ease: ease;
  --max-content-width: 46rem;
}

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

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-primary);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.08), transparent 36%),
    linear-gradient(180deg, #111111 0%, var(--color-bg) 32%, #050505 100%);
  color: var(--color-text);
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.08;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 120px 120px;
  mask-image: radial-gradient(circle at center, black, transparent 85%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.09;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.3) 0.5px, transparent 0.5px),
    radial-gradient(circle at 80% 30%, rgba(255, 255, 255, 0.2) 0.8px, transparent 0.8px),
    radial-gradient(circle at 50% 80%, rgba(255, 255, 255, 0.16) 0.7px, transparent 0.7px);
  background-size: 140px 140px, 180px 180px, 200px 200px;
  mix-blend-mode: soft-light;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.app-shell {
  position: relative;
  min-height: 100vh;
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.1);
  z-index: 30;
}

.progress__bar {
  height: 100%;
  width: 0;
  background: #ffffff;
  transition: width var(--transition-duration) var(--transition-ease);
}

.brand {
  position: fixed;
  top: 1.5rem;
  left: var(--screen-padding);
  z-index: 20;
  display: flex;
  align-items: center;
  min-height: 1.75rem;
}

.brand__logo {
  display: block;
  max-width: 8rem;
  width: 100%;
  height: auto;
}

.brand__fallback {
  display: none;
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.back-link {
  position: fixed;
  left: var(--screen-padding);
  bottom: var(--screen-padding);
  z-index: 20;
  padding: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.95rem;
  transition: color 180ms ease, opacity 180ms ease;
}

.back-link:hover,
.back-link:focus-visible {
  color: #ffffff;
}

.back-link[hidden] {
  display: none;
}

.viewport {
  position: relative;
  min-height: 100vh;
  padding: clamp(5rem, 10vw, 7rem) var(--screen-padding) calc(var(--screen-padding) + 2rem);
}

.screen-stack {
  position: relative;
  height: calc(100vh - clamp(5rem, 10vw, 7rem) - calc(var(--screen-padding) + 2rem));
  min-height: calc(100vh - clamp(5rem, 10vw, 7rem) - calc(var(--screen-padding) + 2rem));
  overflow: hidden;
}

.screen {
  position: absolute;
  inset: 0;
  display: grid;
  align-items: center;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.screen__inner {
  width: min(100%, var(--max-content-width));
  padding-top: 3rem;
}

.screen--intro .screen__inner,
.screen--confirmation .screen__inner {
  padding-top: 0;
}

.screen.enter-from-bottom {
  opacity: 0;
  transform: translate3d(0, 36px, 0);
}

.screen.enter-from-top {
  opacity: 0;
  transform: translate3d(0, -36px, 0);
}

.screen.is-active {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  transition:
    opacity var(--transition-duration) var(--transition-ease),
    transform var(--transition-duration) var(--transition-ease);
}

.screen.exit-to-top {
  opacity: 0;
  transform: translate3d(0, -36px, 0);
  transition:
    opacity var(--transition-duration) var(--transition-ease),
    transform var(--transition-duration) var(--transition-ease);
}

.screen.exit-to-bottom {
  opacity: 0;
  transform: translate3d(0, 36px, 0);
  transition:
    opacity var(--transition-duration) var(--transition-ease),
    transform var(--transition-duration) var(--transition-ease);
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 1rem;
  color: var(--color-muted);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.question {
  margin: 0 0 1rem;
  font-size: var(--question-size);
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.subtext {
  max-width: 34rem;
  margin: 0 0 2rem;
  color: var(--color-muted);
  font-size: clamp(1rem, 2vw, 1.1rem);
  line-height: 1.6;
}

.optional-note {
  display: inline-flex;
  margin-left: 0.5rem;
  color: rgba(255, 255, 255, 0.42);
  font-size: 0.95rem;
  font-weight: 500;
}

.field-group {
  display: grid;
  gap: 0.85rem;
  max-width: 34rem;
}

.text-input,
.text-area {
  width: 100%;
  padding: 0 0 1rem;
  border: 0;
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
  background: transparent;
  color: #ffffff;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.5;
  outline: none;
  transition: border-color 180ms ease;
}

.text-area {
  min-height: 7.5rem;
  resize: vertical;
}

.text-input::placeholder,
.text-area::placeholder {
  color: rgba(255, 255, 255, 0.26);
}

.text-input:focus,
.text-area:focus {
  border-color: rgba(255, 255, 255, 0.72);
}

.field-prefix {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: 0.75rem;
}

.field-prefix__symbol {
  padding-bottom: 1rem;
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.1rem;
}

.options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  max-width: 40rem;
}

.option-pill {
  padding: 0.95rem 1.15rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 500;
  transition:
    border-color 180ms ease,
    background-color 180ms ease,
    transform 180ms ease;
}

.option-pill:hover,
.option-pill:focus-visible {
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-1px);
}

.option-pill.is-selected {
  background: #ffffff;
  color: #0a0a0a;
  border-color: #ffffff;
}

.consent-block {
  max-width: 42rem;
  padding: 1.35rem 1.4rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  color: var(--color-muted);
  font-size: 0.98rem;
  line-height: 1.75;
}

.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
  color: #ffffff;
  cursor: pointer;
}

.checkbox input {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: #ffffff;
}

.hint-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem;
  margin-top: 1rem;
}

.hint {
  color: rgba(255, 255, 255, 0.48);
  font-size: 0.9rem;
}

.action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 12rem;
  padding: 0.95rem 1.35rem;
  border-radius: 2px;
  background: #ffffff;
  color: var(--color-button-text);
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform 180ms ease, opacity 180ms ease;
}

.action:hover,
.action:focus-visible {
  transform: translateY(-1px);
}

.error {
  min-height: 1.25rem;
  color: var(--color-error);
  font-size: 0.92rem;
}

.muted {
  color: var(--color-muted);
}

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

.is-confirmation .progress,
.is-confirmation .brand,
.is-confirmation .back-link {
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 720px) {
  .brand {
    top: 1.2rem;
  }

  .brand__logo {
    max-width: 7rem;
  }

  .viewport {
    padding-top: 5rem;
  }

  .screen__inner {
    padding-top: 2rem;
  }

  .subtext {
    margin-bottom: 1.6rem;
  }

  .field-group {
    gap: 0.7rem;
  }

  .options {
    flex-direction: column;
  }

  .option-pill {
    width: 100%;
    justify-content: flex-start;
    text-align: left;
  }

  .hint-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .action {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .screen,
  .progress__bar,
  .action,
  .option-pill,
  .back-link {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}