:root {
  color-scheme: light dark;
  --bg: #f4f5f2;
  --panel: #ffffff;
  --ink: #171b19;
  --muted: #68706b;
  --line: #dfe3dd;
  --accent: #0f8f68;
  --accent-dark: #0b6f53;
  --danger: #b42318;
  --notice-bg: #eef8f3;
  --notice-ink: #23473b;
  --error-bg: #fff1ef;
  --control-bg: #f7f8f6;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101010;
  --panel: #171717;
  --ink: #f8fafc;
  --muted: #a1a1aa;
  --line: #2b2b2b;
  --accent: #35d39b;
  --accent-dark: #22c58c;
  --danger: #ff8a7c;
  --notice-bg: rgba(53, 211, 155, 0.12);
  --notice-ink: #d1fae5;
  --error-bg: rgba(255, 138, 124, 0.12);
  --control-bg: #101010;
}

:root[data-theme="light"] {
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101010;
    --panel: #171717;
    --ink: #f8fafc;
    --muted: #a1a1aa;
    --line: #2b2b2b;
    --accent: #35d39b;
    --accent-dark: #22c58c;
    --danger: #ff8a7c;
    --notice-bg: rgba(53, 211, 155, 0.12);
    --notice-ink: #d1fae5;
    --error-bg: rgba(255, 138, 124, 0.12);
    --control-bg: #101010;
  }
}

:root[data-ui-mode="embedded"] body {
  background: var(--bg);
}

:root[data-ui-mode="embedded"] .shell {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 18px;
}

:root[data-ui-mode="embedded"] .workspace {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: none;
}

:root[data-theme="dark"][data-ui-mode="embedded"] .workspace {
  background: #171717;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100svh;
  background:
    linear-gradient(135deg, rgba(15, 143, 104, 0.12), transparent 36%),
    var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
a {
  font: inherit;
}

.shell {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 18px;
}

.workspace {
  width: min(760px, 100%);
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 26px;
  box-shadow: 0 18px 55px rgba(24, 36, 30, 0.12);
  animation: rise 360ms ease-out both;
}

.masthead {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: 32px;
  line-height: 1.1;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 12px;
  font-size: 15px;
  letter-spacing: 0;
}

.account {
  min-width: 118px;
  text-align: right;
}

.account span,
.summary span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.account strong {
  display: block;
  margin-top: 4px;
  font-size: 16px;
  overflow-wrap: anywhere;
}

.notice {
  margin: 22px 0;
  padding: 12px 14px;
  border-left: 3px solid var(--accent);
  background: var(--notice-bg);
  color: var(--notice-ink);
  font-size: 14px;
}

.notice.error {
  border-left-color: var(--danger);
  background: var(--error-bg);
  color: var(--danger);
}

.section {
  margin-top: 22px;
}

.plans {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.plan {
  text-align: left;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  padding: 16px;
  cursor: pointer;
  min-height: 138px;
  transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.plan:hover {
  transform: translateY(-2px);
  border-color: rgba(15, 143, 104, 0.45);
}

.plan.active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.plan-name {
  display: block;
  font-weight: 750;
  font-size: 16px;
}

.plan-price {
  display: block;
  margin-top: 10px;
  font-size: 28px;
  line-height: 1;
  font-weight: 800;
}

.plan-quota,
.plan-desc {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.segmented {
  display: inline-grid;
  grid-template-columns: repeat(2, 112px);
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--control-bg);
}

.segmented button {
  height: 38px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  color: var(--muted);
  transition: background 160ms ease, color 160ms ease;
}

.segmented button.active {
  background: var(--panel);
  color: var(--ink);
  box-shadow: 0 1px 8px rgba(24, 36, 30, 0.08);
}

.summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.summary strong {
  display: block;
  margin-top: 6px;
  font-size: 22px;
}

.primary {
  width: 100%;
  height: 48px;
  margin-top: 24px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 760;
  transition: background 160ms ease, transform 160ms ease;
}

.primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.primary:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

.link-button {
  display: inline-grid;
  place-items: center;
  text-decoration: none;
}

.success {
  text-align: center;
  max-width: 520px;
}

.success-copy {
  color: var(--muted);
  margin: 14px 0 0;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  .shell {
    align-items: start;
    padding: 12px;
  }

  .workspace {
    padding: 18px;
  }

  .masthead {
    display: block;
  }

  .account {
    margin-top: 12px;
    text-align: left;
  }

  h1 {
    font-size: 28px;
  }

  .plans,
  .summary {
    grid-template-columns: 1fr;
  }

  .segmented {
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}