/* hibi: paper, ink and sage */
:root {
  color-scheme: light dark;
  --md-primary: #242824;
  --md-on-primary: #faf9f6;
  --md-primary-container: #e8ede6;
  --md-on-primary-container: #1c221b;
  --md-secondary-container: #dfe6dc;
  --md-on-secondary-container: #1c241b;
  --md-surface: #faf9f6;
  --md-surface-container-lowest: #ffffff;
  --md-surface-container-low: #f3f2ee;
  --md-surface-container: #eae9e3;
  --md-surface-container-high: #e2e1da;
  --md-on-surface: #242824;
  --md-on-surface-variant: #596057;
  --md-outline: #bfc4bc;
  --md-outline-variant: #e1e3dc;
  --md-inverse-surface: #242824;
  --md-inverse-on-surface: #faf9f6;
  --md-inverse-primary: #b8c7b4;
  --md-error: #b83227;
  --md-scrim: #14171466;

  /* Accent tones: Muted mineral & botanical pigments for avatars */
  --tone-iris: #ecedf4;
  --on-tone-iris: #3e446e;
  --tone-coral: #f6ebe9;
  --on-tone-coral: #873830;
  --tone-butter: #f4eee1;
  --on-tone-butter: #75511f;
  --tone-mint: #e8f0e9;
  --on-tone-mint: #2f573d;
  --tone-sky: #e8eff3;
  --on-tone-sky: #285269;

  /* Stat tile palettes: Warm amber-terracotta (elapsed) & forest sage (upcoming) */
  --tone-stat-days: #faf6f1;
  --on-tone-stat-days: #382518;
  --border-stat-days: #e6dcd0;
  --label-stat-days: #78553c;

  --tone-stat-birthday: #f4f7f3;
  --on-tone-stat-birthday: #1d2b1b;
  --border-stat-birthday: #d7e0d4;
  --label-stat-birthday: #4a5e46;

  --accent-coral: #9e2a3b;
  --on-accent-coral: #ffffff;
  --hero: #ffffff;
  --hero-border: #dfe2da;
  --card-shadow: 0 1px 2px 0 rgba(24, 28, 24, 0.03), 0 12px 32px -8px rgba(24, 28, 24, 0.05);

  --md-ease: cubic-bezier(0.2, 0, 0, 1);
  --md-duration: 200ms;
  font-family:
    system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP",
    "Noto Sans CJK JP", "Yu Gothic UI", sans-serif;
  font-synthesis: none;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--md-on-surface);
  background: var(--md-surface);
}
@media (prefers-color-scheme: dark) {
  :root {
    --md-primary: #eef0ec;
    --md-on-primary: #1a1e1a;
    --md-primary-container: #2a3329;
    --md-on-primary-container: #e4ebe2;
    --md-secondary-container: #2c362b;
    --md-on-secondary-container: #e4ebe2;
    --md-surface: #171b17;
    --md-surface-container-lowest: #1c211c;
    --md-surface-container-low: #1e231e;
    --md-surface-container: #242a24;
    --md-surface-container-high: #2b322b;
    --md-on-surface: #eef0ec;
    --md-on-surface-variant: #a5ada3;
    --md-outline: #525b50;
    --md-outline-variant: #2c332c;
    --md-inverse-surface: #eef0ec;
    --md-inverse-on-surface: #1c211c;
    --md-inverse-primary: #3b4d38;
    --md-error: #e57368;
    --md-scrim: #00000080;

    --tone-iris: #25283b;
    --on-tone-iris: #c2c7e8;
    --tone-coral: #382321;
    --on-tone-coral: #e8b6b0;
    --tone-butter: #332919;
    --on-tone-butter: #e3c798;
    --tone-mint: #1e3024;
    --on-tone-mint: #a8cfb3;
    --tone-sky: #1d2e38;
    --on-tone-sky: #a6c9da;

    --tone-stat-days: #221e1a;
    --on-tone-stat-days: #f0e6dc;
    --border-stat-days: #362e26;
    --label-stat-days: #bfa189;

    --tone-stat-birthday: #1b221b;
    --on-tone-stat-birthday: #e4ede2;
    --border-stat-birthday: #2b382a;
    --label-stat-birthday: #95ae91;

    --accent-coral: #b83b4d;
    --on-accent-coral: #ffffff;
    --hero: #212721;
    --hero-border: #303830;
    --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.35), 0 14px 34px -8px rgba(0, 0, 0, 0.45);
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100dvh;
  /* Break Japanese text between phrases where supported. */
  word-break: auto-phrase;
}
button,
input,
select {
  font: inherit;
  color: inherit;
}
button,
summary,
a {
  -webkit-tap-highlight-color: transparent;
}
summary {
  list-style: none;
}
summary::-webkit-details-marker {
  display: none;
}
button,
summary {
  cursor: pointer;
  touch-action: manipulation;
}
:focus-visible {
  outline: 2px solid var(--md-primary);
  outline-offset: 2px;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.icon {
  width: 20px;
  height: 20px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Top app bar */
.top-app-bar {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--md-on-surface);
  text-decoration: none;
  border-radius: 6px;
}
.brand img {
  display: block;
  width: 108px;
  height: 36px;
}
.account {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.account[hidden],
.outlined-button[hidden],
.account-menu[hidden] {
  display: none;
}
.sync-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--md-on-surface-variant);
  white-space: nowrap;
}
.sync-status:not(:empty)::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #7d8c79;
}
.outlined-button {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 20px;
  border: 1px solid var(--md-outline);
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--md-primary);
  text-decoration: none;
  white-space: nowrap;
}
.account-menu {
  position: relative;
}
.account-menu summary {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-right: -4px;
  border-radius: 50%;
}
.avatar {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--md-outline-variant);
  font-size: 15px;
  font-weight: 600;
  color: var(--md-on-primary-container);
  background: var(--md-primary-container);
}
.menu {
  position: absolute;
  top: 50px;
  right: 0;
  z-index: 10;
  width: min(300px, calc(100vw - 32px));
  padding: 16px 0 8px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 18px;
  background: var(--md-surface-container-lowest);
  box-shadow: var(--card-shadow);
}
.menu-name,
.menu-email,
.menu-note {
  margin: 0;
  padding: 0 18px;
  overflow-wrap: anywhere;
}
.menu-name {
  font-size: 15px;
  line-height: 22px;
  font-weight: 600;
}
.menu-email,
.menu-note {
  font-size: 12px;
  line-height: 18px;
  color: var(--md-on-surface-variant);
}
.menu-note {
  margin-top: 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--md-outline-variant);
}
.menu-item {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 44px;
  margin-top: 0;
  padding: 0 18px;
  border: 0;
  background: none;
  font-size: 14px;
  text-align: left;
}
.menu-note + .menu-item {
  margin-top: 4px;
}
.menu-item.danger {
  color: var(--md-error);
}

/* Layout */
.shell {
  max-width: 1040px;
  margin: 0 auto;
  padding: 16px 24px 56px;
}
h1 {
  margin: 8px 0 6px;
  font-size: 28px;
  line-height: 36px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.page-description {
  margin: 0 0 28px;
  color: var(--md-on-surface-variant);
  font-size: 14px;
  line-height: 1.65;
  letter-spacing: 0.01em;
}
h2 {
  margin: 0;
  font-size: 15px;
  line-height: 22px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--md-on-surface);
}
.calculator {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
  align-items: stretch;
}
.card {
  border-radius: 28px;
  padding: 32px;
  min-width: 0;
}
.input-card {
  display: flex;
  flex-direction: column;
  background: var(--md-surface-container-low);
  border: 1px solid var(--md-outline-variant);
}
form {
  margin-top: 22px;
}

/* Saved people */
.people {
  margin-bottom: 28px;
}
.section-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.people-count {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  line-height: 18px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--md-on-surface-variant);
  background: var(--md-surface-container);
}
.people-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.person {
  position: relative;
  min-width: 0;
}
.person-open {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas:
    "avatar text text"
    "avatar next age";
  align-items: center;
  column-gap: 14px;
  row-gap: 8px;
  width: 100%;
  min-height: 92px;
  padding: 16px 18px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 20px;
  text-align: left;
  background: var(--md-surface-container-lowest);
  box-shadow: 0 1px 2px rgba(24, 28, 24, 0.02);
  transition:
    border-color var(--md-duration) var(--md-ease),
    background-color var(--md-duration) var(--md-ease),
    box-shadow var(--md-duration) var(--md-ease);
}
.person-open[aria-current="true"] {
  border-color: var(--md-primary);
  background: var(--md-primary-container);
}
.person-avatar {
  grid-area: avatar;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 17px;
  font-weight: 600;
  color: var(--on-tone, var(--on-tone-iris));
  background: var(--tone, var(--tone-iris));
}
.person-avatar[data-tone="coral"] {
  --tone: var(--tone-coral);
  --on-tone: var(--on-tone-coral);
}
.person-avatar[data-tone="butter"] {
  --tone: var(--tone-butter);
  --on-tone: var(--on-tone-butter);
}
.person-avatar[data-tone="mint"] {
  --tone: var(--tone-mint);
  --on-tone: var(--on-tone-mint);
}
.person-avatar[data-tone="sky"] {
  --tone: var(--tone-sky);
  --on-tone: var(--on-tone-sky);
}
.person-text {
  grid-area: text;
  display: grid;
  gap: 2px;
  min-width: 0;
  padding-right: 32px;
}
.person-name {
  font-size: 15px;
  line-height: 22px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.person-wareki {
  white-space: nowrap;
}
.person-birth {
  font-size: 12px;
  line-height: 16px;
  font-variant-numeric: tabular-nums;
  color: var(--md-on-surface-variant);
}
.person-age {
  grid-area: age;
  align-self: end;
  white-space: nowrap;
}
.person-age-value {
  font-size: 26px;
  line-height: 30px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--md-primary);
}
.person-open[aria-current="true"] .person-age-value {
  color: var(--md-on-primary-container);
}
.person-age-unit {
  margin-left: 2px;
  font-size: 13px;
  color: var(--md-on-surface-variant);
}
.person-next {
  grid-area: next;
  justify-self: start;
  align-self: end;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  line-height: 16px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--md-on-surface-variant);
  background: var(--md-surface-container-low);
}
.person-open[aria-current="true"] .person-next:not(.today) {
  color: var(--md-on-primary-container);
  background: var(--md-surface-container-lowest);
}
.person-next.today {
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
  color: var(--on-accent-coral);
  background: var(--accent-coral);
}
.icon-button {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: none;
  color: var(--md-on-surface-variant);
}
.person-delete {
  position: absolute;
  top: 10px;
  right: 10px;
  opacity: 0.65;
  transition:
    opacity var(--md-duration) var(--md-ease),
    color var(--md-duration) var(--md-ease);
}
.person-delete:hover,
.person-delete:focus-visible {
  opacity: 1;
  color: var(--md-error);
}

/* Text fields (outlined) */
.field {
  position: relative;
  min-width: 0;
}
.field label {
  position: absolute;
  top: -9px;
  left: 12px;
  max-width: calc(100% - 24px);
  padding: 0 5px;
  overflow: hidden;
  font-size: 12px;
  line-height: 16px;
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: var(--md-on-surface-variant);
  background: var(--md-surface-container-low);
  pointer-events: none;
  transition: color var(--md-duration) var(--md-ease);
}
.field :is(input, select) {
  display: block;
  width: 100%;
  min-width: 0;
  height: 54px;
  margin: 0;
  padding: 0 16px;
  border: 1px solid var(--md-outline);
  border-radius: 4px;
  background: transparent;
  font-size: 16px;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
  transition:
    border-color var(--md-duration) var(--md-ease),
    box-shadow var(--md-duration) var(--md-ease);
}
.field select {
  padding-right: 36px;
  appearance: none;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='m7 10 5 5 5-5' fill='none' stroke='%2360685e' stroke-width='1.75' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")
    right 10px center / 20px no-repeat;
}
.field select option {
  color: var(--md-on-surface);
  background: var(--md-surface-container);
}
/* iOS Safari: native date inputs ignore width, center their text and collapse when empty. */
.field input[type="date"] {
  -webkit-appearance: none;
  appearance: none;
  max-width: 100%;
  min-height: 54px;
  line-height: 52px;
  text-align: left;
}
input[type="date"]::-webkit-date-and-time-value {
  min-height: 1.5em;
  margin: 0;
  text-align: left;
}
input[type="date"]::-webkit-calendar-picker-indicator {
  cursor: pointer;
  opacity: 0.65;
}
.field :is(input, select):hover {
  border-color: var(--md-on-surface);
}
.field :is(input, select):focus-visible {
  outline: none;
  border-color: var(--md-primary);
  box-shadow: inset 0 0 0 1px var(--md-primary);
}
.field:focus-within label {
  color: var(--md-primary);
}
.field [aria-invalid="true"],
.field [aria-invalid="true"]:hover {
  border-color: var(--md-error);
}
.field [aria-invalid="true"]:focus-visible {
  box-shadow: inset 0 0 0 1px var(--md-error);
}
.field:has([aria-invalid="true"]) label {
  color: var(--md-error);
}
.supporting-text {
  margin: 6px 14px 0;
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0.02em;
  color: var(--md-on-surface-variant);
}

/* Segmented button: 西暦 / 和暦 */
.segmented {
  margin: 20px 0 14px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: 40px;
  border: 1px solid var(--md-outline);
  border-radius: 20px;
  background: var(--md-surface);
  overflow: hidden;
}
.segment {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--md-on-surface-variant);
  cursor: pointer;
}
.segment + .segment {
  border-left: 1px solid var(--md-outline);
}
.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.segmented .check {
  display: none;
  width: 17px;
  height: 17px;
}
.segment:has(:checked) {
  font-weight: 600;
  color: var(--md-on-secondary-container);
  background: var(--md-secondary-container);
}
.segment:has(:checked) .check {
  display: block;
}
.segment:has(:focus-visible) {
  outline: 2px solid var(--md-primary);
  outline-offset: -2px;
}
.wareki {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) repeat(3, minmax(0, 1fr));
  gap: 8px;
  min-width: 0;
  margin-inline: 0;
  padding: 0;
  border: 0;
}
.wareki[hidden] {
  display: none;
}

/* Expandable row for the reference date */
.date-options {
  margin-top: 14px;
}
.date-options summary {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  margin: 0 -10px;
  padding: 0 10px;
  border-radius: 22px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--md-on-surface-variant);
}
.summary-label {
  flex: 1;
}
.chevron {
  transition: transform var(--md-duration) var(--md-ease);
}
.date-options[open] .chevron {
  transform: rotate(180deg);
}
.date-option-content {
  padding: 14px 0 4px;
}

/* State layers (hover 8%, pressed 10%) */
:where(
  .filled-button,
  .tonal-button,
  .text-button,
  .outlined-button,
  .icon-button,
  .menu-item,
  .person-open,
  .segment,
  .account-menu summary,
  .date-options summary,
  .about summary,
  .snackbar-action
) {
  position: relative;
  isolation: isolate;
}
:where(
  .filled-button,
  .tonal-button,
  .text-button,
  .outlined-button,
  .icon-button,
  .menu-item,
  .person-open,
  .segment,
  .account-menu summary,
  .date-options summary,
  .about summary,
  .snackbar-action
)::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: currentColor;
  opacity: 0;
  transition: opacity var(--md-duration) var(--md-ease);
}
@media (hover: hover) {
  :where(
    .filled-button,
    .tonal-button,
    .text-button,
    .outlined-button,
    .icon-button,
    .menu-item,
    .person-open,
    .segment,
    .account-menu summary,
    .date-options summary,
    .about summary,
    .snackbar-action
  ):hover::before {
    opacity: 0.08;
  }
}
:where(
  .filled-button,
  .tonal-button,
  .text-button,
  .outlined-button,
  .icon-button,
  .menu-item,
  .person-open,
  .segment,
  .account-menu summary,
  .date-options summary,
  .about summary,
  .snackbar-action
):active::before {
  opacity: 0.1;
}

/* Buttons */
.text-button {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  margin: 8px 0 0 -12px;
  padding: 0 12px;
  border: 0;
  border-radius: 19px;
  background: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--md-primary);
}
.text-button[hidden] {
  display: none;
}
.text-button.on-container {
  margin: 0;
  color: var(--md-on-surface-variant);
}
.error {
  margin: 0;
  font-size: 12px;
  line-height: 16px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--md-error);
}
/* The error replaces the hint as the field's supporting text, so nothing below it moves. */
.error:not(:empty) {
  margin: 6px 14px 0;
}
.supporting-text:has(+ .error:not(:empty)) {
  display: none;
}
.filled-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 54px;
  margin-top: 20px;
  padding: 0 24px;
  border: 0;
  border-radius: 27px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--md-on-primary);
  background: var(--md-primary);
  transition: box-shadow var(--md-duration) var(--md-ease);
}
.filled-button .icon {
  transition: transform var(--md-duration) var(--md-ease);
}
@media (hover: hover) {
  .filled-button:hover {
    box-shadow: 0 4px 12px rgba(24, 28, 24, 0.14);
  }
  .filled-button:hover .icon {
    transform: translateX(2px);
  }
}
.tonal-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px 0 16px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 22px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--md-on-primary-container);
  background: var(--md-primary-container);
}
.privacy {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: auto 0 0;
  padding-top: 20px;
  font-size: 12px;
  line-height: 18px;
  letter-spacing: 0.02em;
  color: var(--md-on-surface-variant);
}
.privacy .icon {
  width: 15px;
  height: 15px;
  opacity: 0.8;
}

/* Result card */
.result-card {
  display: flex;
  flex-direction: column;
  color: var(--md-on-surface);
  background: var(--hero);
  border: 1px solid var(--hero-border);
  box-shadow: var(--card-shadow);
}
#result {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.age-line {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 12px 0 6px;
}
#age-value {
  font-size: clamp(76px, 9.5vw, 104px);
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--md-on-surface);
}
#result[data-empty] {
  --tone-stat-days: var(--md-surface);
  --on-tone-stat-days: var(--md-on-surface-variant);
  --border-stat-days: var(--md-outline-variant);
  --label-stat-days: var(--md-on-surface-variant);
  --tone-stat-birthday: var(--md-surface);
  --on-tone-stat-birthday: var(--md-on-surface-variant);
  --border-stat-birthday: var(--md-outline-variant);
  --label-stat-birthday: var(--md-on-surface-variant);
}
#result[data-empty] :is(#age-value, .stat strong) {
  font-weight: 300;
  opacity: 0.32;
}
.age-unit {
  font-size: 22px;
  line-height: 30px;
  font-weight: 500;
  color: var(--md-on-surface-variant);
}
.result-caption,
.birth-line {
  min-height: 20px;
  margin: 2px 0 0;
  font-size: 13px;
  line-height: 20px;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--md-on-surface-variant);
}
.birth-line {
  margin-bottom: 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--md-on-surface);
}
.result-stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
  margin-top: auto;
}
.stat {
  --stat-label: var(--label-stat-days);
  min-width: 0;
  padding: 16px 18px;
  border-radius: 16px;
  color: var(--on-tone-stat-days);
  background: var(--tone-stat-days);
  border: 1px solid var(--border-stat-days);
  transition:
    background-color var(--md-duration) var(--md-ease),
    border-color var(--md-duration) var(--md-ease),
    color var(--md-duration) var(--md-ease);
}
.stat + .stat {
  --stat-label: var(--label-stat-birthday);
  color: var(--on-tone-stat-birthday);
  background: var(--tone-stat-birthday);
  border-color: var(--border-stat-birthday);
}
.stat p {
  margin: 0;
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0.02em;
  color: var(--stat-label);
  font-weight: 500;
}
.stat .stat-value {
  margin-top: 6px;
  color: inherit;
  white-space: nowrap;
}
.stat strong {
  font-size: clamp(22px, 6.5vw, 28px);
  line-height: 34px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: inherit;
}
.stat span {
  margin-left: 4px;
  font-size: 13px;
  font-weight: 400;
  opacity: 0.8;
}
.birthday-note {
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 20px;
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 20px;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--md-on-surface-variant);
}
.birthday-note.today {
  font-weight: 600;
  color: var(--accent-coral);
}
.birthday-note.today::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-coral);
}
.result-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--md-outline-variant);
}

/* About */
.about {
  max-width: 640px;
  margin: 36px auto 0;
  text-align: center;
  color: var(--md-on-surface-variant);
}
.about summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
}
.about p {
  margin: 8px 0 0;
  text-align: left;
  font-size: 14px;
  line-height: 22px;
  letter-spacing: 0.02em;
}
.about-list {
  margin: 12px 0 0;
  padding: 18px 24px 18px 36px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 20px;
  text-align: left;
  font-size: 13px;
  line-height: 22px;
  color: var(--md-on-surface-variant);
  background: var(--md-surface-container-low);
}
.about-list li + li {
  margin-top: 6px;
}

/* Snackbar */
.snackbar {
  position: fixed;
  left: 50%;
  bottom: max(20px, env(safe-area-inset-bottom));
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 8px;
  width: max-content;
  max-width: calc(100vw - 32px);
  min-height: 48px;
  padding: 4px 10px 4px 18px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 20px;
  color: var(--md-inverse-on-surface);
  background: var(--md-inverse-surface);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.22);
  transform: translateX(-50%);
  animation: snackbar-in var(--md-duration) var(--md-ease);
}
.snackbar[hidden],
.snackbar-action[hidden] {
  display: none;
}
.snackbar-action {
  flex: none;
  min-height: 36px;
  padding: 0 12px;
  border: 0;
  border-radius: 18px;
  background: none;
  font-size: 13px;
  font-weight: 600;
  color: var(--md-inverse-primary);
}
@keyframes snackbar-in {
  from {
    opacity: 0;
    transform: translate(-50%, 8px);
  }
}

/* Dialog */
.dialog {
  width: min(400px, calc(100vw - 48px));
  padding: 24px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 28px;
  color: var(--md-on-surface);
  background: var(--md-surface-container-lowest);
  box-shadow: var(--card-shadow);
}
.dialog::backdrop {
  background: var(--md-scrim);
}
.dialog h2 {
  font-size: 20px;
  line-height: 28px;
  font-weight: 600;
}
.dialog p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 22px;
  color: var(--md-on-surface-variant);
}
.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 24px;
}
.dialog-actions .text-button {
  margin: 0;
}

@media (max-width: 700px) {
  .top-app-bar {
    height: 60px;
    padding: 0 16px;
  }
  .shell {
    padding: 8px 16px 40px;
  }
  h1 {
    margin: 4px 0 4px;
    font-size: 24px;
    line-height: 32px;
  }
  .page-description {
    margin: 0 0 20px;
  }
  .people {
    margin-bottom: 22px;
  }
  .calculator {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }
  .card {
    padding: 24px 20px;
    border-radius: 24px;
  }
  #result {
    scroll-margin-top: 16px;
  }
  #age-value {
    font-size: 84px;
  }
  .sync-status {
    display: none;
  }
}
@media (max-width: 380px) {
  .stat {
    padding: 14px 12px;
  }
  .wareki {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 16px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .field label,
  .field :is(input, select),
  .chevron,
  .filled-button,
  .filled-button .icon,
  .person-open,
  .person-delete,
  .stat,
  :where(
    .filled-button,
    .tonal-button,
    .text-button,
    .outlined-button,
    .icon-button,
    .menu-item,
    .person-open,
    .segment,
    .account-menu summary,
    .date-options summary,
    .about summary,
    .snackbar-action
  )::before {
    transition: none;
  }
  .snackbar {
    animation: none;
  }
}