* { box-sizing: border-box; }
html { font-family: var(--kdl-font); color: var(--kdl-text); background: #edefea; color-scheme: light; }
body { margin: 0; font-size: var(--kdl-body-size); line-height: var(--kdl-line); }
button, input, summary { -webkit-tap-highlight-color: transparent; }
button, input { font: inherit; }
button { cursor: pointer; touch-action: manipulation; }
button:disabled { cursor: not-allowed; }
button, input, summary { scroll-margin-block: 24px; }
button:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 2px solid var(--kdl-focus);
  outline-offset: 3px;
  box-shadow: 0 0 0 3px var(--kdl-surface);
}
[hidden] { display: none !important; }
p { margin: 0; }
.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;
}
.preview-frame { width: min(100%, 880px); margin: 0 auto; padding: 24px; }
.preview-notice { margin: 0 0 20px; color: var(--kdl-text-secondary); font-size: var(--kdl-help-size); }
.preview-notice__title { margin-bottom: 4px; color: var(--kdl-text); font-size: 1rem; font-weight: 600; }
.preview-stage { display: grid; grid-template-columns: minmax(320px, 390px) minmax(0, 1fr); align-items: start; gap: 32px; }
.home-shell {
  position: relative;
  width: 100%; max-width: var(--kdl-content-max); min-height: 844px;
  margin: 0 auto; display: flex; flex-direction: column;
  padding-top: max(68px, env(safe-area-inset-top, 0px));
  padding-bottom: max(26px, env(safe-area-inset-bottom, 0px));
  background: var(--kdl-canvas); border-radius: 24px;
  outline: 1px solid var(--kdl-border-strong);
}
.home-form { width: 100%; margin: 0; }
.kdl-brand { text-align: center; }
.kdl-brand__logo { display: block; width: 180px; height: 80px; object-fit: contain; margin: 0 auto; }
.kdl-brand__title { margin: 32px 16px 0; font-size: var(--kdl-home-title-size); font-weight: 700; line-height: 1.25; }
.kdl-brand__subtitle { margin: 8px 16px 0; font-size: 1rem; line-height: 1.5; color: var(--kdl-text-secondary); }
.kdl-brand--compact { display: flex; align-items: center; gap: 8px; text-align: left; }
.kdl-brand--compact .kdl-brand__logo { width: 56px; height: auto; margin: 0; }
.kdl-brand--compact .kdl-brand__title { margin: 0; font-size: 1.25rem; line-height: 1.4; }
.kdl-start { margin-top: 28px; text-align: center; }
.kdl-start__ring {
  width: max(var(--kdl-start-ring-size), 8rem); height: max(var(--kdl-start-ring-size), 8rem); padding: max(8px, .5rem);
  margin: 0 auto; border-radius: 50%; background: var(--kdl-start-ring);
  box-shadow: 0 12px 20px -12px rgb(172 32 28 / 25%);
}
.kdl-start__button {
  position: relative; display: block; width: max(var(--kdl-start-size), 7rem); height: max(var(--kdl-start-size), 7rem);
  padding: 0; border: 0; border-radius: 50%; color: white;
  background: radial-gradient(circle at 32% 24%, var(--kdl-start-light) 0%, var(--kdl-start-mid) 48%, var(--kdl-start-deep) 100%);
  font-size: 2rem; line-height: 1.25; font-weight: 700;
  transition: filter var(--kdl-transition), background-color var(--kdl-transition);
}
.kdl-start__button::after {
  content: ''; position: absolute; pointer-events: none; inset: 9px 11px;
  border-radius: 50%; border: 2px solid transparent; border-top-color: rgb(255 255 255 / 25%);
  transform: rotate(-15deg);
}
.kdl-start__button:not(:disabled):active { filter: brightness(.9); }
.kdl-start__button:disabled { background: var(--kdl-start-disabled); color: var(--kdl-start-disabled-text); }
.kdl-start__button:disabled::after { display: none; }
.kdl-start[data-state='disabled'] .kdl-start__ring,
.kdl-start[data-state='busy'] .kdl-start__ring { background: #f0e7e5; box-shadow: none; }
.kdl-start__caption { margin: 8px 16px 0; color: var(--kdl-start-caption); font-size: 1rem; line-height: 1.5; font-weight: 600; }
.home-fields { display: flex; flex-direction: column; gap: 16px; margin: 48px 24px 0; }
.kdl-field { position: relative; min-width: 0; }
.kdl-field__input {
  appearance: none; width: 100%; min-height: var(--kdl-field-height); border-radius: var(--kdl-field-radius);
  border: 1px solid transparent; margin: 0; padding: 15px calc(var(--kdl-field-inset) - 1px);
  color: var(--kdl-field-text); background: var(--kdl-field-surface); font-size: 1.0625rem; line-height: 1.65;
  transition: background-color var(--kdl-transition), border-color var(--kdl-transition);
}
.kdl-field__input::placeholder { color: var(--kdl-field-placeholder); opacity: 1; }
.kdl-field__input:focus { background-color: #f0f4f9; border-color: #849bb6; }
.kdl-field__input[aria-invalid='true'] { border-color: var(--kdl-danger); }
.kdl-field__error { margin: 8px 12px 0; color: var(--kdl-danger); font-size: var(--kdl-help-size); line-height: 1.5; }
.home-help { margin-top: 4px; color: var(--kdl-text-secondary); font-size: var(--kdl-help-size); line-height: 1.5; }
.kdl-feedback { border-radius: var(--kdl-panel-radius); padding: 12px 16px; background: var(--kdl-primary-soft); color: var(--kdl-primary-pressed); font-size: var(--kdl-help-size); line-height: 1.5; overflow-wrap: anywhere; }
.kdl-feedback[data-tone='error'] { background: var(--kdl-danger-soft); color: var(--kdl-danger); }
.home-footer { margin-top: auto; padding: 72px 16px 0; }
.home-footer__buttons { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 8px; }
.home-footer .kdl-feedback { margin: 0 8px 12px; }
.kdl-text-button { display: inline-flex; align-items: center; justify-content: center; min-height: var(--kdl-hit-min); min-width: 82px; padding: 10px 8px; border: 0; border-radius: var(--kdl-action-radius); color: var(--kdl-text-secondary); background: transparent; font-size: var(--kdl-help-size); line-height: 1.5; }
.kdl-text-button:active { background: var(--kdl-surface-muted); }
.demo-panel { min-width: 0; background: var(--kdl-surface); border: 1px solid var(--kdl-border); border-radius: var(--kdl-panel-radius); }
.demo-panel__details > summary { display: list-item; min-height: 48px; padding: 14px 20px; cursor: pointer; font-weight: 600; border-radius: var(--kdl-panel-radius); }
.demo-panel__body { padding: 4px 20px 20px; font-size: var(--kdl-help-size); color: var(--kdl-text-secondary); }
.demo-panel__state { margin-bottom: 12px; color: var(--kdl-text); font-weight: 600; }
.demo-panel__scenarios { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 16px 0 8px; }
.demo-button { min-height: var(--kdl-hit-min); padding: 10px 8px; border: 1px solid var(--kdl-border-strong); border-radius: var(--kdl-action-radius); background: var(--kdl-surface); color: var(--kdl-text); font-size: var(--kdl-help-size); line-height: 1.5; }
.demo-button[aria-pressed='true'] { border-color: var(--kdl-primary); background: var(--kdl-primary-soft); color: var(--kdl-primary-pressed); }
.demo-button:active { background: var(--kdl-surface-muted); }
.demo-button--reset { width: 100%; }
.demo-panel__limits { margin-top: 16px; }
.intro-preparing .home-form, .intro-preparing .home-footer { visibility: hidden; }
.intro-preparing, .intro-running { overflow: clip; }
.intro-running .kdl-brand__logo { position: relative; z-index: 4; }
.intro-stage { position: absolute; inset: 0; pointer-events: none; z-index: 3; }
.intro-disc {
  position: absolute; display: grid; place-items: center; border-radius: 50%;
  background: radial-gradient(circle at 32% 24%, var(--kdl-start-light), var(--kdl-start-mid) 48%, var(--kdl-start-deep));
  box-shadow: 0 0 0 8px var(--kdl-start-ring), 0 14px 24px -12px rgb(172 32 28 / 30%);
}
.intro-disc::after { content: ''; position: absolute; inset: 9px 11px; border-radius: 50%; border: 2px solid transparent; border-top-color: rgb(255 255 255 / 25%); transform: rotate(-15deg); }
.intro-go { display: block; color: white; font-weight: 700; line-height: 1.25; }
.intro-particle { position: absolute; display: block; background: var(--kdl-start-mid); border-radius: 70% 70% 55% 55%; }
.intro-skip { position: absolute; z-index: 5; top: 12px; right: 16px; min-height: 48px; padding: 8px 12px; border: 0; border-radius: 24px; background: var(--kdl-surface); color: var(--kdl-text-secondary); font-size: .875rem; }
.demo-panel__body > .demo-button--reset { margin-top: 12px; }
@media (max-width: 719px) {
  html { background: var(--kdl-canvas); }
  .preview-frame { width: 100%; padding: 0; }
  .preview-notice { max-width: 430px; margin: 0 auto; padding: max(12px, env(safe-area-inset-top, 0px)) 16px 12px; background: var(--kdl-primary-soft); color: var(--kdl-primary-pressed); }
  .preview-stage { display: flex; flex-direction: column; gap: 24px; }
  .home-shell { border-radius: 0; outline: none; min-height: max(844px, 100svh); }
  .demo-panel { width: calc(100% - 32px); max-width: 398px; margin: 0 auto max(24px, env(safe-area-inset-bottom, 0px)); }
}
@media (max-width: 359px) {
  .home-fields { margin-inline: 16px; }
  .kdl-brand__subtitle { font-size: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}
@media (forced-colors: active) {
  .kdl-start__button, .kdl-field__input, .demo-button { border: 1px solid ButtonText; }
  .kdl-start__button:disabled { color: GrayText; }
}