:root {
  --color-primary: #171717;
  --color-primary-hover: #2f2f2f;
  --color-accent: #a16207;
  --color-accent-soft: #fef3c7;
  --color-background: #f4f6f8;
  --color-card: #ffffff;
  --color-text: #171717;
  --color-muted: #5f6875;
  --color-border: #dfe3e8;
  --color-error: #b42318;
  --color-ring: #b7791f;
  --shadow-modal: 0 24px 70px rgba(0, 0, 0, 0.28);
  --radius-lg: 24px;
  --radius-md: 14px;
  --transition-fast: 180ms ease;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--color-text);
  background: var(--color-background);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-width: 320px;
  min-height: 100%;
  margin: 0;
}

body {
  font-size: 16px;
  line-height: 1.5;
}

button {
  font: inherit;
}

.demo-shell {
  min-height: 100vh;
  padding: clamp(20px, 4vw, 48px);
  background:
    linear-gradient(135deg, rgba(161, 98, 7, 0.05), transparent 38%),
    var(--color-background);
}

.demo-header {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 1120px;
  margin: 0 auto 72px;
}

.demo-header h1,
.demo-content h2 {
  margin: 0;
  letter-spacing: -0.03em;
}

.demo-header h1 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--color-muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.brand-mark,
.status-icon,
.calendar-icon {
  display: inline-grid;
  flex: 0 0 auto;
  place-items: center;
}

.brand-mark {
  width: 48px;
  height: 48px;
  color: white;
  background: var(--color-primary);
  border-radius: 14px;
}

.demo-badge {
  margin-left: auto;
  padding: 6px 10px;
  color: #714700;
  background: var(--color-accent-soft);
  border: 1px solid #f4d58d;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.demo-content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  gap: 48px;
  align-items: center;
  max-width: 960px;
  margin: 0 auto;
}

.demo-content h2 {
  max-width: 540px;
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 1.05;
}

.demo-copy {
  max-width: 540px;
  color: var(--color-muted);
  font-size: 1.125rem;
}

.status-card {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 36px rgba(23, 23, 23, 0.08);
}

.status-icon {
  width: 48px;
  height: 48px;
  color: #067647;
  background: #dcfae6;
  border-radius: 50%;
}

.status-card strong,
.status-card span {
  display: block;
}

.status-card span {
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.reset-button {
  grid-column: 1 / -1;
  justify-self: start;
  min-height: 48px;
  padding: 10px 16px;
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.reset-button:hover {
  background: #ffffff;
  border-color: #aab1ba;
}

.worktime-overlay {
  position: fixed;
  z-index: 2147483647;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: auto;
  padding: max(20px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(20px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  background: rgba(9, 14, 25, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overscroll-behavior: contain;
}

.worktime-overlay[hidden] {
  display: none;
}

.worktime-dialog {
  width: min(760px, 100%);
  padding: clamp(24px, 5vw, 48px);
  background: var(--color-card);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  outline: none;
}

.dialog-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.dialog-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #714700;
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.history-toggle {
  min-height: 44px;
  padding: 10px 14px;
  color: var(--color-text);
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  cursor: pointer;
  touch-action: manipulation;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.history-toggle:hover {
  background: #fffbeb;
  border-color: #d5a44c;
}

.history-toggle[aria-pressed="true"] {
  color: #714700;
  background: var(--color-accent-soft);
  border-color: #d5a44c;
}

.history-toggle:disabled {
  color: #7b8490;
  background: #f2f4f7;
  cursor: wait;
}

.calendar-icon {
  width: 36px;
  height: 36px;
  background: var(--color-accent-soft);
  border-radius: 10px;
}

.worktime-dialog h1 {
  max-width: 620px;
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

#worktime-description {
  max-width: 580px;
  margin: 16px 0 32px;
  color: var(--color-muted);
  font-size: 1rem;
}

.history-panel {
  display: grid;
  grid-template-columns: minmax(180px, 240px) minmax(0, 1fr);
  gap: 8px 16px;
  align-items: center;
  margin: -12px 0 24px;
  padding: 16px;
  background: #fffbeb;
  border: 1px solid #f4d58d;
  border-radius: var(--radius-md);
}

.history-panel[hidden] {
  display: none;
}

.history-panel label {
  color: #714700;
  font-size: 0.875rem;
  font-weight: 750;
}

.history-panel input {
  min-width: 0;
  min-height: 48px;
  padding: 10px 12px;
  color: var(--color-text);
  background: #ffffff;
  border: 1px solid #d5a44c;
  border-radius: 10px;
  font: inherit;
}

.history-panel input:focus-visible,
.history-toggle:focus-visible {
  outline: 3px solid var(--color-ring);
  outline-offset: 3px;
}

.history-panel p {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--color-muted);
  font-size: 0.8125rem;
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.choice-button {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  min-height: 104px;
  padding: 18px;
  color: var(--color-text);
  text-align: left;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  touch-action: manipulation;
  transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

.choice-button:hover {
  background: #fffbeb;
  border-color: #d5a44c;
}

.choice-button:active {
  background: #fef3c7;
}

.choice-button:focus-visible,
.reset-button:focus-visible {
  outline: 3px solid var(--color-ring);
  outline-offset: 3px;
}

.choice-button:disabled {
  color: #7b8490;
  background: #f2f4f7;
  border-color: #e3e7ec;
  cursor: wait;
}

.choice-button.is-loading {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(23, 23, 23, 0.1);
}

.choice-number {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: #714700;
  background: var(--color-accent-soft);
  border-radius: 9px;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.dialog-status {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 28px;
  margin-top: 24px;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.dialog-status.is-error {
  color: var(--color-error);
  font-weight: 650;
}

.lock-icon {
  display: inline-flex;
}

.toast {
  position: fixed;
  z-index: 2147483647;
  right: 24px;
  bottom: 24px;
  max-width: min(420px, calc(100vw - 32px));
  padding: 14px 18px;
  color: #ffffff;
  background: #171717;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

@media (max-width: 720px) {
  .demo-header {
    margin-bottom: 48px;
  }

  .demo-content {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .choice-grid {
    grid-template-columns: 1fr;
  }

  .worktime-dialog {
    border-radius: 18px;
  }

  .dialog-topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .history-toggle {
    width: 100%;
  }

  .history-panel {
    grid-template-columns: 1fr;
  }

  .history-panel p {
    grid-column: auto;
  }

  .choice-button {
    min-height: 82px;
  }
}

@media (max-width: 420px) {
  .demo-badge {
    display: none;
  }

  .worktime-overlay {
    place-items: start center;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .worktime-dialog {
    padding: 22px 18px;
  }

  .dialog-topbar {
    margin-bottom: 18px;
  }

  #worktime-description {
    margin: 12px 0 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}