/* ── CSS Variables ── */
:root {
  --color-primary: #4f8ef7;
  --color-primary-dark: #2563eb;
  --color-primary-deeper: #1d4ed8;
  --color-text: #333;
  --color-text-light: #a3a3a3;
  --color-text-muted: #c5c5c5;
  --color-bg: #eef2f7;
  --color-white: #fff;
  --color-error: #ef4444;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 16px;
  --radius-xl: 18px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, .03);
  --shadow: 0 4px 24px rgba(0, 0, 0, .06);
  --shadow-primary: 0 4px 20px rgba(37, 99, 235, .35);
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mobile-breakpoint: 600px;
  --field-height: 50px;
  --field-height-mobile: 48px;
  --font-size-base: 16px;
}

/* ── Reset ── */
* { margin: 0; padding: 0; box-sizing: border-box; }

/* ── Body ── */
body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Top Bar ── */
.topbar {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 50%, var(--color-primary-deeper) 100%);
  padding: 14px 24px;
  text-align: center;
  box-shadow: var(--shadow-primary);
  position: relative;
  z-index: 10;
  flex-shrink: 0;
}
.topbar h1 {
  color: var(--color-white);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 2px;
}

/* ── Main ── */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 20px;
  min-height: 0;
}

/* ── Status Tags ── */
.status-tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}
.status-tag.success { background: #dcfce7; color: #15803d; }
.status-tag.pending { background: #fef3c7; color: #b45309; }
.status-tag.failed  { background: #fee2e2; color: #b91c1c; }

/* ── Footer ── */
.footer {
  text-align: center;
  padding: 18px;
  font-size: 12px;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* ── Mobile ── */
@media (max-width: var(--mobile-breakpoint)) {
  .topbar { padding: 12px 20px; }
  .topbar h1 { font-size: 16px; letter-spacing: 1px; }
  .main { padding: 28px 20px; }
}