:root {
  color-scheme: light;
  --ink: #242035;
  --muted: #7b758b;
  --line: #ece9f3;
  --surface: rgba(255, 255, 255, 0.86);
  --surface-strong: #fff;
  --purple: #7356d8;
  --purple-dark: #5334b7;
  --purple-soft: #f0edff;
  --lavender: #e8e1ff;
  --coral: #e9816e;
  --shadow: 0 18px 54px rgba(72, 52, 137, 0.1);
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: #f9f8fc; }
body { min-height: 100vh; margin: 0; color: var(--ink); background: transparent; }
button, input, select { font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid rgba(115, 86, 216, 0.28); outline-offset: 2px; }
[hidden] { display: none !important; }

.app-background { position: fixed; inset: 0; z-index: -1; overflow: hidden; background: linear-gradient(145deg, #fcfbff 0%, #f6f3ff 54%, #fbfafc 100%); }
.app-background::before, .app-background::after { content: ""; position: absolute; border-radius: 999px; filter: blur(1px); opacity: .45; }
.app-background::before { width: 420px; height: 420px; top: -220px; right: -150px; background: #ded4ff; }
.app-background::after { width: 320px; height: 320px; bottom: -200px; left: -160px; background: #ffe4e4; }
.app { width: min(100%, 760px); margin: 0 auto; padding: 28px 20px 54px; }
.screen { min-height: calc(100vh - 82px); }
.screen--narrow { display: grid; place-items: center; max-width: 540px; margin: 0 auto; }
.center-state { min-height: 70vh; display: grid; place-content: center; justify-items: center; color: var(--muted); gap: 12px; }
.center-state p { margin: 0; font-size: .9rem; }

.brand-lockup { display: flex; align-items: center; gap: 12px; }
.brand-lockup--compact { gap: 9px; }
.brand-lockup h1 { margin: 0; font-size: 1.08rem; letter-spacing: .04em; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 14px; color: #fff; font-family: Georgia, serif; font-size: 1.5rem; font-weight: 700; background: linear-gradient(145deg, #8870eb, #6244c8); box-shadow: 0 8px 20px rgba(93, 62, 192, .22); }
.brand-mark--large { width: 54px; height: 54px; font-size: 1.8rem; }
.eyebrow { margin: 0 0 5px; color: var(--purple); font-size: .66rem; font-weight: 800; letter-spacing: .16em; line-height: 1.2; }
.muted { color: var(--muted); line-height: 1.8; }
.small-note { display: block; color: var(--muted); font-size: .76rem; }

.card { border: 1px solid rgba(255,255,255,.7); border-radius: 25px; background: var(--surface); box-shadow: var(--shadow); backdrop-filter: blur(18px); }
.login-card, .onboarding-card { width: 100%; padding: clamp(28px, 7vw, 52px); }
.login-copy { margin: 62px 0 30px; }
.login-copy h2 { margin: 0 0 16px; font-size: clamp(1.8rem, 7vw, 2.65rem); letter-spacing: -.055em; line-height: 1.25; }
.login-copy p:last-child { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.8; }
.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 13px; padding: 10px 16px; font-weight: 750; font-size: .86rem; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-1px); }
.button--wide { width: 100%; }
.button--primary { color: #fff; background: var(--purple); box-shadow: 0 10px 20px rgba(100, 70, 202, .2); }
.button--primary:hover { background: var(--purple-dark); }
.button--secondary { color: var(--purple-dark); background: var(--purple-soft); }
.button--google { color: #29243a; background: #fff; border: 1px solid #e5e1ed; box-shadow: 0 8px 18px rgba(39, 28, 76, .06); }
.google-g { color: #4285f4; font: 800 1.1rem Arial, sans-serif; }
.button--ghost { color: var(--muted); background: #f4f2f8; }
.button--danger { color: #fff; background: #d85d58; }
.button--danger-ghost { color: #c85d5b; background: transparent; padding-left: 0; }
.text-button { border: 0; padding: 4px 0; color: var(--purple); background: transparent; font-size: .8rem; font-weight: 800; }
.demo-login-block { margin-top: 14px; }
.notice { margin: 0 0 12px; padding: 11px 13px; border-radius: 12px; font-size: .78rem; line-height: 1.6; }
.notice--info { color: #5e5581; background: #f2efff; }
.form-error { margin: 12px 0 0; color: #bd514f; font-size: .8rem; line-height: 1.6; }

.topbar { display: flex; align-items: center; justify-content: space-between; padding: 2px 0 28px; }
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.icon-button, .avatar-button, .month-arrow, .close-button { border: 0; }
.icon-button { width: 38px; height: 38px; border-radius: 12px; color: var(--purple-dark); background: rgba(255,255,255,.65); font-size: 1.06rem; }
.avatar-button { width: 38px; height: 38px; border-radius: 50%; color: #fff; background: var(--purple); font-weight: 800; font-size: .86rem; }
.demo-banner { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 0 0 18px; padding: 11px 14px; color: #665b89; border: 1px solid #e4ddff; border-radius: 14px; background: rgba(243, 239, 255, .8); font-size: .74rem; line-height: 1.5; }
.demo-banner strong { color: var(--purple-dark); }
.content-stack { display: grid; gap: 22px; }
.month-switcher { display: flex; align-items: center; justify-content: space-between; padding: 6px 0 0; }
.month-label-wrap { text-align: center; }
.month-label-wrap h2 { margin: 0; font-size: 1.32rem; letter-spacing: -.04em; }
.month-arrow { width: 42px; height: 42px; border-radius: 14px; color: var(--purple-dark); background: rgba(255,255,255,.78); font-size: 1.3rem; box-shadow: 0 5px 16px rgba(64, 45, 132, .07); }
.month-arrow:hover { background: #fff; }
.summary-card { position: relative; display: flex; align-items: center; justify-content: space-between; min-height: 170px; overflow: hidden; padding: 27px 28px; border-radius: 26px; color: #fff; background: linear-gradient(125deg, #8069df, #6147c4 72%, #5036ae); box-shadow: 0 20px 38px rgba(91, 64, 188, .25); }
.summary-kicker { margin: 0 0 14px; color: #e9e2ff; font-size: .78rem; font-weight: 700; }
.summary-amount { margin: 0; font-size: clamp(2.45rem, 12vw, 4.4rem); font-weight: 850; letter-spacing: -.075em; line-height: .98; }
.summary-amount span { margin-left: 5px; font-size: 1.05rem; letter-spacing: 0; }
.summary-caption { margin: 14px 0 0; color: #dcd4ff; font-size: .75rem; }
.summary-orbit { position: absolute; right: -22px; bottom: -62px; width: 190px; height: 190px; border: 1px solid rgba(255,255,255,.2); border-radius: 50%; }
.summary-orbit::before, .summary-orbit::after { content: ""; position: absolute; border: 1px solid rgba(255,255,255,.14); border-radius: 50%; }
.summary-orbit::before { inset: 20px; }.summary-orbit::after { inset: 50px; }
.summary-orbit span { position: absolute; width: 8px; height: 8px; border-radius: 50%; background: #f4e989; }.summary-orbit span:nth-child(1) { top: 30px; left: 28px; }.summary-orbit span:nth-child(2) { right: 18px; top: 70px; width: 5px; height: 5px; background: #ffb9ae; }.summary-orbit span:nth-child(3) { bottom: 23px; left: 64px; width: 6px; height: 6px; background: #fff; }
.list-section { display: grid; gap: 14px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 12px; }
.section-heading h2 { margin: 0; font-size: 1.14rem; letter-spacing: -.035em; }
.count-pill { padding: 5px 9px; border-radius: 999px; color: var(--purple-dark); background: var(--purple-soft); font-size: .72rem; font-weight: 800; }
.payment-list { display: grid; gap: 9px; }
.payment-row { width: 100%; display: grid; grid-template-columns: 52px minmax(0,1fr) auto; align-items: center; gap: 13px; padding: 14px 15px; text-align: left; border: 1px solid rgba(231, 227, 240, .8); border-radius: 17px; color: var(--ink); background: rgba(255,255,255,.86); box-shadow: 0 7px 20px rgba(59, 43, 117, .045); transition: transform .18s ease, box-shadow .18s ease; }
.payment-row:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(59, 43, 117, .09); }
.payment-day { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 14px; color: var(--purple-dark); background: var(--purple-soft); font-weight: 850; font-size: 1.05rem; letter-spacing: -.06em; }
.payment-day small { display: block; margin-top: -11px; color: var(--purple); font-size: .58rem; letter-spacing: .02em; }
.payment-name { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .93rem; font-weight: 800; }
.payment-method { overflow: hidden; margin-top: 5px; color: var(--muted); text-overflow: ellipsis; white-space: nowrap; font-size: .72rem; }
.payment-method::before { content: "↳ "; color: #aaa2bf; }
.payment-amount { white-space: nowrap; font-size: 1rem; font-weight: 850; letter-spacing: -.04em; }.payment-amount small { margin-left: 2px; font-size: .68rem; font-weight: 700; letter-spacing: 0; }
.empty-state { padding: 30px 22px; text-align: center; }.empty-icon { display: grid; place-items: center; width: 44px; height: 44px; margin: 0 auto 12px; border-radius: 50%; color: var(--purple); background: var(--purple-soft); }.empty-state h3 { margin: 0 0 6px; font-size: .95rem; }.empty-state p { margin: 0; color: var(--muted); font-size: .78rem; line-height: 1.7; }
.add-button { width: 100%; min-height: 54px; border: 1px dashed #b9a9f2; border-radius: 17px; color: var(--purple-dark); background: rgba(244, 240, 255, .65); font-size: .9rem; font-weight: 800; }.add-button span { font-size: 1.3rem; vertical-align: -1px; }.add-button:hover { background: var(--purple-soft); }
.privacy-note { margin: -6px 0 0; text-align: center; color: #aaa3b9; font-size: .69rem; }

.dialog { width: min(calc(100% - 28px), 560px); max-height: calc(100% - 28px); padding: 0; border: 0; border-radius: 24px; background: transparent; box-shadow: 0 30px 70px rgba(33, 22, 76, .22); }.dialog::backdrop { background: rgba(39, 28, 73, .3); backdrop-filter: blur(4px); }
.dialog-card { padding: 25px; border: 1px solid rgba(255,255,255,.75); border-radius: 24px; background: #fff; }.dialog-card--small { max-width: 420px; margin: auto; }.dialog-header { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-bottom: 22px; }.dialog-header h2 { margin: 0; font-size: 1.35rem; letter-spacing: -.045em; }.close-button { width: 30px; height: 30px; border-radius: 9px; color: var(--muted); background: #f3f1f7; font-size: 1.2rem; line-height: 1; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 12px; }.field { min-width: 0; }.field--full { grid-column: 1 / -1; }.field-label { display: block; margin-bottom: 7px; color: #625b75; font-size: .73rem; font-weight: 800; }.input { width: 100%; min-height: 44px; border: 1px solid #e3dfeb; border-radius: 12px; padding: 10px 12px; color: var(--ink); background: #fbfaff; font-size: .86rem; }.input::placeholder { color: #b3aec0; }.input:focus { border-color: #9d89ed; background: #fff; outline: none; }.input-with-unit { display: flex; align-items: center; gap: 6px; }.input-with-unit .input { min-width: 0; }.input-with-unit span { color: var(--muted); font-size: .8rem; }.dialog-actions { display: flex; align-items: center; gap: 9px; margin-top: 24px; }.dialog-actions--end { justify-content: end; }.dialog-actions-spacer { flex: 1; }
.divider { display: flex; align-items: center; gap: 12px; margin: 22px 0; color: #aaa4b8; font-size: .72rem; }.divider::before, .divider::after { content: ""; height: 1px; flex: 1; background: var(--line); }.onboarding-card .muted { margin: 22px 0 26px; font-size: .85rem; }.onboarding-actions { padding-top: 3px; }.inline-form { display: grid; grid-template-columns: 1fr auto; gap: 8px; }.share-code-box { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 18px 0 9px; padding: 16px 17px; border-radius: 15px; color: var(--purple-dark); background: var(--purple-soft); }.share-code-box span { font: 800 1.25rem/1 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .13em; }.account-summary { display: flex; align-items: center; gap: 12px; margin: 0 0 22px; }.account-avatar { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--purple); font-weight: 800; }
.toast { position: fixed; left: 50%; bottom: 22px; z-index: 10; max-width: calc(100% - 32px); padding: 11px 15px; border-radius: 12px; color: #fff; background: #31294d; box-shadow: 0 12px 28px rgba(35, 25, 78, .22); font-size: .78rem; opacity: 0; pointer-events: none; transform: translate(-50%, 12px); transition: opacity .2s ease, transform .2s ease; }.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

@media (min-width: 680px) { .app { padding-top: 38px; }.summary-card { min-height: 205px; padding: 34px 38px; }.payment-row { grid-template-columns: 58px minmax(0,1fr) 120px; padding: 14px 18px; }.payment-amount { text-align: right; }.dialog-card { padding: 30px; } }
@media (max-width: 460px) { .app { padding: 20px 14px 40px; }.topbar { padding-bottom: 20px; }.brand-lockup--compact .eyebrow { display: none; }.demo-banner { align-items: flex-start; }.form-grid { grid-template-columns: 1fr; }.field--full { grid-column: auto; }.dialog-actions { flex-wrap: wrap; }.dialog-actions-spacer { display: none; }.dialog-actions .button { flex: 1; }.dialog-actions .button--danger-ghost { flex-basis: 100%; justify-content: flex-start; }.login-copy { margin-top: 42px; } }
.field-help { margin: 6px 0 0; color: #aaa3b9; font-size: .68rem; line-height: 1.5; }