:root {
  color: #17221d;
  background: #f7f9f8;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  --ink: #17221d;
  --muted: #66736d;
  --line: #dce4e0;
  --surface: #ffffff;
  --green: #176b50;
  --green-strong: #0f563f;
  --green-soft: #e6f3ed;
  --blue: #285d85;
  --warning: #9b5d12;
  --danger: #a13d37;
  --shadow: 0 10px 30px rgba(23, 34, 29, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: #f7f9f8;
  color: var(--ink);
}

button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }

.icon-library { position: absolute; width: 0; height: 0; overflow: hidden; }
svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.hidden { display: none !important; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 228, 224, 0.9);
  background: rgba(247, 249, 248, 0.94);
  backdrop-filter: blur(14px);
}

.topbar-inner {
  width: min(100% - 32px, 1040px);
  height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 6px;
  background: var(--ink);
  color: white;
  font-size: 13px;
}

.topbar-actions { display: flex; align-items: center; gap: 4px; }
.icon-button, .copy-button {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.icon-button:hover, .copy-button:hover { background: #e9eeeb; color: var(--ink); }
.icon-button:focus-visible, .copy-button:focus-visible, .button:focus-visible, input:focus-visible, .text-link:focus-visible {
  outline: 3px solid rgba(40, 93, 133, 0.25);
  outline-offset: 2px;
}

.page { width: min(100% - 32px, 1040px); margin: 0 auto; padding: 48px 0 72px; }
.center-state { min-height: 50vh; display: grid; place-items: center; align-content: center; gap: 14px; color: var(--muted); }
.center-state p { margin: 0; }
.spinner { width: 30px; height: 30px; border: 3px solid #d6dfda; border-top-color: var(--green); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.login-view { min-height: calc(100vh - 184px); display: grid; place-items: center; }
.login-panel {
  width: min(100%, 420px);
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.login-panel h1 { margin: 4px 0 26px; font-size: 28px; line-height: 1.2; letter-spacing: 0; }
.login-panel label { display: block; margin-bottom: 8px; color: var(--muted); font-size: 14px; }
.login-panel input {
  width: 100%;
  height: 46px;
  padding: 0 13px;
  border: 1px solid #cbd6d1;
  border-radius: 6px;
  background: white;
  color: var(--ink);
}
.login-panel .button { margin-top: 14px; }

.eyebrow { margin: 0; color: var(--muted); font-size: 13px; font-weight: 650; }
.account-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; padding: 12px 0 32px; }
.account-heading h1 { margin: 8px 0 0; font-size: 52px; line-height: 1; letter-spacing: 0; }
.status-pill { display: inline-flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 999px; background: #eef2f0; color: var(--muted); font-size: 14px; font-weight: 650; }
.status-pill span { width: 8px; height: 8px; border-radius: 50%; background: #9aa6a0; }
.status-pill.ok { background: var(--green-soft); color: var(--green-strong); }
.status-pill.ok span { background: #20a06b; }
.status-pill.error { background: #f7e9e7; color: var(--danger); }
.status-pill.error span { background: var(--danger); }

.primary-actions { display: flex; flex-wrap: wrap; gap: 10px; padding-bottom: 30px; }
.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 700;
  letter-spacing: 0;
  cursor: pointer;
}
.button.primary { background: var(--green); color: white; }
.button.primary:hover { background: var(--green-strong); }
.button.secondary { border-color: #cbd6d1; background: white; color: var(--ink); }
.button.secondary:hover { background: #eef2f0; }
.button.full { width: 100%; }
.button:disabled { cursor: wait; opacity: 0.65; }

.metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.metric { min-width: 0; position: relative; display: flex; align-items: center; gap: 13px; padding: 24px 20px; }
.metric + .metric { border-left: 1px solid var(--line); }
.metric > svg { flex: 0 0 auto; color: var(--green); }
.metric div { min-width: 0; display: grid; gap: 5px; }
.metric span { color: var(--muted); font-size: 13px; }
.metric strong { min-width: 0; overflow-wrap: anywhere; font-size: 17px; letter-spacing: 0; }
.metric .copy-button { position: absolute; top: 22px; right: 8px; width: 34px; height: 34px; }
.metric:last-child { padding-right: 48px; }

.redeem-panel { margin-top: 24px; padding: 22px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 18px; border: 1px solid #b7d4c6; border-radius: 8px; background: #eef8f3; }
.redeem-panel h2, .usage-section h2, .developer-panel h2, .support-band h2 { margin: 5px 0 0; font-size: 20px; letter-spacing: 0; }
.redeem-panel .form-error { grid-column: 1 / -1; }

.usage-section, .developer-panel { padding: 42px 0 12px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.usage-list { border-top: 1px solid var(--line); }
.usage-row { display: grid; grid-template-columns: minmax(100px, 1fr) auto auto; gap: 28px; align-items: center; padding: 14px 4px; border-bottom: 1px solid var(--line); }
.usage-row time { color: var(--muted); font-variant-numeric: tabular-nums; }
.usage-row span { color: var(--muted); font-size: 14px; }
.usage-row strong { min-width: 92px; text-align: right; font-variant-numeric: tabular-nums; }
.empty-state { padding: 24px 0; color: var(--muted); border-top: 1px solid var(--line); }

.developer-panel { border-top: 1px solid var(--line); }
.detail-list { margin: 0; border-top: 1px solid var(--line); }
.detail-list > div { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 18px; padding: 15px 4px; border-bottom: 1px solid var(--line); }
.detail-list dt { color: var(--muted); }
.detail-list dd { margin: 0; overflow-wrap: anywhere; font-family: "Cascadia Mono", Consolas, monospace; }

.support-band { margin-top: 42px; padding: 24px 0; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.support-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; }
.text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--blue); font-weight: 650; }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.text-link svg { width: 18px; height: 18px; }

.form-error { margin: 12px 0 0; color: var(--danger); font-size: 14px; }
.toast { position: fixed; z-index: 50; left: 50%; bottom: 26px; transform: translateX(-50%); max-width: min(90vw, 480px); padding: 11px 15px; border-radius: 6px; background: var(--ink); color: white; box-shadow: var(--shadow); font-size: 14px; }

@media (max-width: 760px) {
  .page { padding-top: 28px; }
  .account-heading { align-items: flex-start; flex-direction: column; }
  .account-heading h1 { font-size: 42px; }
  .metrics { grid-template-columns: 1fr; }
  .metric + .metric { border-left: 0; border-top: 1px solid var(--line); }
  .redeem-panel { grid-template-columns: 1fr; }
  .redeem-panel .button { width: 100%; }
  .support-band { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 480px) {
  .topbar-inner, .page { width: min(100% - 24px, 1040px); }
  .topbar-inner { height: 58px; }
  .page { padding-bottom: 48px; }
  .login-panel { padding: 24px 20px; }
  .account-heading h1 { font-size: 38px; }
  .primary-actions { display: grid; grid-template-columns: 1fr; }
  .button { width: 100%; }
  .metric { padding-left: 4px; padding-right: 4px; }
  .metric:last-child { padding-right: 42px; }
  .usage-row { grid-template-columns: 1fr auto; gap: 8px 16px; }
  .usage-row span { grid-column: 1; }
  .usage-row strong { grid-column: 2; grid-row: 1 / span 2; }
  .detail-list > div { grid-template-columns: 1fr; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; }
}