.kunoi-settings-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(16, 24, 28, .58);
  backdrop-filter: blur(12px);
  opacity: 0;
  transition: opacity .18s ease;
}

.kunoi-settings-backdrop.is-open { opacity: 1; }

.kunoi-settings-panel {
  width: min(740px, 100%);
  max-height: min(860px, calc(100dvh - 32px));
  overflow: auto;
  overscroll-behavior: contain;
  border: 1px solid var(--border, #dfe3e5);
  border-radius: 24px;
  background: var(--surface, #fff);
  color: var(--ink, #18231f);
  box-shadow: 0 26px 80px rgba(16, 24, 28, .22);
  scrollbar-width: thin;
  transform: translateY(10px) scale(.99);
  transition: transform .22s cubic-bezier(.22, 1, .36, 1);
}

.is-open > .kunoi-settings-panel { transform: none; }

.kunoi-settings-panel header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 30px 24px;
  border-bottom: 1px solid var(--border, #dfe3e5);
  background: color-mix(in srgb, var(--surface, #fff) 96%, transparent);
  backdrop-filter: blur(14px);
}

.kunoi-settings-panel h2 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2rem);
  line-height: 1.08;
  letter-spacing: -.035em;
  white-space: nowrap;
}

.kunoi-settings-panel header p {
  margin: 7px 0 0;
  color: var(--muted, #69736f);
  font-size: .95rem;
  line-height: 1.45;
}

.kunoi-settings-close {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--border, #dfe3e5);
  border-radius: 12px;
  background: var(--surface-raised, #fff);
  color: inherit;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color .16s ease, background .16s ease, transform .16s ease;
}

.kunoi-settings-close:hover {
  border-color: var(--line-hover, #b9c1bd);
  background: var(--surface-soft, #f4f6f5);
  transform: translateY(-1px);
}

.kunoi-settings-close:focus-visible,
.kunoi-setting-row select:focus-visible {
  outline: 0;
  box-shadow: 0 0 0 3px rgba(22, 115, 79, .2);
}

.kunoi-settings-panel form { padding: 8px 30px 30px; }

.kunoi-settings-panel section {
  padding: 24px 0;
  border-bottom: 1px solid var(--border, #dfe3e5);
}

.kunoi-settings-panel section:last-child { border: 0; }

.kunoi-settings-panel h3 {
  margin: 0 0 12px;
  color: var(--muted, #69736f);
  font-size: .8rem;
  font-weight: 750;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.kunoi-setting-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(190px, 250px);
  align-items: center;
  gap: 28px;
  min-height: 76px;
  padding: 11px 0;
}

.kunoi-setting-row strong,
.kunoi-setting-row small { display: block; }

.kunoi-setting-row strong {
  font-size: .98rem;
  line-height: 1.25;
}

.kunoi-setting-row small {
  max-width: 360px;
  margin-top: 5px;
  color: var(--muted, #69736f);
  font-size: .82rem;
  line-height: 1.45;
}

.kunoi-setting-row select {
  width: 100%;
  min-height: 48px;
  padding: 0 50px 0 15px;
  border: 1px solid var(--border, #d1d7d4);
  border-radius: 13px;
  appearance: none;
  background-color: var(--surface-raised, #fff);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%235d6863' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m7 10 5 5 5-5'/%3E%3C/svg%3E");
  background-position: right 16px center;
  background-repeat: no-repeat;
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: border-color .16s ease, background-color .16s ease, box-shadow .16s ease;
}

.kunoi-setting-row select:hover {
  border-color: var(--line-hover, #aeb8b3);
  background-color: var(--surface-soft, #f8f9f8);
}

.kunoi-switch {
  position: relative;
  display: inline-flex;
  justify-self: end;
  cursor: pointer;
}

.kunoi-switch input { position: absolute; opacity: 0; }
.kunoi-switch span {
  width: 50px;
  height: 29px;
  border-radius: 999px;
  background: #cbd2cf;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .06);
  transition: .18s ease;
}

.kunoi-switch span::after {
  content: "";
  display: block;
  width: 23px;
  height: 23px;
  margin: 3px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, .18);
  transition: .18s ease;
}

.kunoi-switch input:checked + span { background: #16734f; }
.kunoi-switch input:checked + span::after { transform: translateX(21px); }
.kunoi-switch input:focus-visible + span { outline: 3px solid rgba(22, 115, 79, .25); outline-offset: 3px; }

.kunoi-plan-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px;
  border: 1px solid var(--border, #dfe3e5);
  border-radius: 16px;
  background: var(--surface-soft, #f4f6f5);
}

.kunoi-plan-card > div:first-child span,
.kunoi-plan-card > div:first-child strong { display: block; }
.kunoi-plan-card > div:first-child span { color: var(--muted, #69736f); font-size: .78rem; }
.kunoi-plan-card > div:first-child strong { margin-top: 4px; font-size: 1.2rem; }
.kunoi-plan-usage { display: flex; gap: 24px; }
.kunoi-plan-usage span,
.kunoi-plan-usage strong { display: block; text-align: right; }
.kunoi-plan-usage span { color: var(--muted, #69736f); font-size: .78rem; }
.kunoi-settings-account-link { display: inline-flex; margin-top: 15px; color: #16734f; font-weight: 750; text-decoration: none; }
.kunoi-settings-account-link:hover { text-decoration: underline; }

[data-theme="dark"] .kunoi-settings-panel,
[data-theme="dark"] .kunoi-settings-panel header {
  border-color: #37424b;
  background: #20272d;
  color: #edf1ed;
}

[data-theme="dark"] .kunoi-setting-row select {
  border-color: #45525e;
  background-color: #29323a;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%23cbd3ce' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m7 10 5 5 5-5'/%3E%3C/svg%3E");
  color: #edf1ed;
}

[data-theme="dark"] .kunoi-setting-row select:hover { border-color: #65737e; background-color: #252e35; }
[data-theme="dark"] .kunoi-plan-card { border-color: #3d4852; background: #29323a; }

@media (max-width: 620px) {
  .kunoi-settings-backdrop { padding: 0; }
  .kunoi-settings-panel { width: 100%; height: 100dvh; max-height: none; border: 0; border-radius: 0; }
  .kunoi-settings-panel header { padding: calc(18px + env(safe-area-inset-top)) 20px 18px; }
  .kunoi-settings-panel form { padding: 6px 20px calc(28px + env(safe-area-inset-bottom)); }
  .kunoi-settings-panel section { padding: 20px 0; }
  .kunoi-setting-row { grid-template-columns: 1fr; gap: 10px; min-height: 0; padding: 14px 0; }
  .kunoi-setting-row select { min-height: 50px; font-size: 16px; background-position: right 17px center; }
  .kunoi-switch { justify-self: start; }
  .kunoi-plan-card { align-items: flex-start; flex-direction: column; }
  .kunoi-plan-usage { width: 100%; justify-content: space-between; }
  .kunoi-plan-usage span,
  .kunoi-plan-usage strong { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  .kunoi-settings-backdrop,
  .kunoi-settings-panel,
  .kunoi-settings-close,
  .kunoi-setting-row select,
  .kunoi-switch span,
  .kunoi-switch span::after { transition-duration: .01ms !important; }
}