:root {
  --accent: #6366f1;
  --accent2: #a855f7;
  --grad: linear-gradient(135deg, #5b7cfa, #a855f7);
  --card: #ffffff;
  --card-border: #ece9f7;
  --text: #1f2340;
  --muted: #8b8ba7;
  --field: #f6f5fb;
  --field-border: #e4e1f0;
  --danger: #f43f6b;
  --radius: 22px;
}

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

html, body {
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: linear-gradient(135deg, #6b7ff5 0%, #7c6ff0 45%, #9b5cf0 100%);
}
.bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 500px at 12% 8%, rgba(120, 150, 255, 0.55) 0%, transparent 60%),
    radial-gradient(900px 600px at 95% 100%, rgba(168, 85, 247, 0.5) 0%, transparent 55%);
}

.container {
  max-width: 560px;
  margin: 0 auto;
  padding: 48px 16px 60px;
}

/* Hero */
.hero { text-align: center; margin-bottom: 24px; }
.logo {
  width: 68px;
  height: 68px;
  margin: 0 auto 14px;
  filter: drop-shadow(0 8px 20px rgba(80, 60, 180, 0.35));
}
.logo svg { width: 100%; height: 100%; display: block; }
.hero h1 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: #fff;
  text-shadow: 0 2px 12px rgba(40, 20, 90, 0.25);
}
.subtitle { margin-top: 8px; color: rgba(255, 255, 255, 0.9); font-size: 13.5px; }

/* Card */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 24px 60px rgba(50, 30, 110, 0.22);
}

.card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 16px;
}
.card-title .hint { font-size: 12px; font-weight: 400; color: var(--muted); }

/* Inputs */
.input-row { display: flex; gap: 10px; }
input[type="text"] {
  flex: 1;
  width: 100%;
  padding: 13px 15px;
  border-radius: 14px;
  border: 1.5px solid var(--field-border);
  background: var(--field);
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
input[type="text"]:focus {
  border-color: var(--accent2);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(168, 85, 247, 0.15);
}
input::placeholder { color: #b3b1c9; }

/* Buttons */
button { cursor: pointer; font-family: inherit; border: none; }
.btn-primary {
  background: var(--grad);
  color: #fff;
  border-radius: 14px;
  padding: 12px 18px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 8px 20px rgba(120, 90, 240, 0.35);
  transition: transform 0.12s, filter 0.2s, box-shadow 0.2s;
}
.btn-primary:hover { filter: brightness(1.06); box-shadow: 0 10px 26px rgba(120, 90, 240, 0.45); }
.btn-primary:active { transform: scale(0.97); }
.btn-primary.sm { padding: 8px 15px; font-size: 13px; }

.btn-ghost {
  background: #f0eef8;
  color: #6a6a86;
  border-radius: 14px;
  padding: 12px 16px;
  font-size: 14px;
  transition: background 0.2s;
}
.btn-ghost:hover { background: #e6e3f3; }

.btn-copy {
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: 10px;
  padding: 6px 13px;
  font-size: 13px;
  font-weight: 600;
  transition: background 0.2s;
}
.btn-copy:hover { background: rgba(99, 102, 241, 0.2); }

/* Result */
.result {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 18px;
  padding: 18px;
  border-radius: 16px;
  background: linear-gradient(135deg, #f5f3ff, #faf5ff);
  border: 1px solid #eee7fb;
}
.code-block { flex: 1; min-width: 0; }
.code {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: 5px;
  font-variant-numeric: tabular-nums;
  font-family: "SF Mono", "Consolas", "Menlo", monospace;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.code-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  gap: 10px;
}
.issuer { color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Ring countdown */
.ring-wrap { position: relative; width: 64px; height: 64px; flex: none; }
.ring { width: 64px; height: 64px; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: #e7e2f5; stroke-width: 4; }
.ring-fg {
  fill: none;
  stroke: var(--accent2);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 119.38;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear, stroke 0.3s;
}
.ring-wrap.warn .ring-fg { stroke: var(--danger); }
.ring-num {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.ring-wrap.warn .ring-num { color: var(--danger); }

/* Account list */
.add-form { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.add-actions { display: flex; gap: 10px; }

.account-list { display: flex; flex-direction: column; gap: 12px; }
.acc {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--field);
  border: 1px solid var(--field-border);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, transform 0.1s;
}
.acc:hover { border-color: var(--accent2); background: #faf7ff; }
.acc:active { transform: scale(0.995); }
.acc .info { flex: 1; min-width: 0; }
.acc .name { font-weight: 600; font-size: 14px; margin-bottom: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.acc .acode {
  font-size: 27px;
  font-weight: 800;
  letter-spacing: 3px;
  font-variant-numeric: tabular-nums;
  font-family: "SF Mono", "Consolas", "Menlo", monospace;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.acc .del {
  background: transparent;
  color: #b8b6cc;
  font-size: 18px;
  padding: 6px 8px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.acc .del:hover { color: var(--danger); background: rgba(244, 63, 107, 0.1); }
.acc .ring-wrap { width: 46px; height: 46px; }
.acc .ring { width: 46px; height: 46px; }
.acc .ring-num { font-size: 13px; }

.empty-tip { color: var(--muted); font-size: 13px; text-align: center; padding: 16px 0; line-height: 1.6; }

.foot { text-align: center; color: rgba(255, 255, 255, 0.85); font-size: 12px; margin-top: 14px; }

.error { margin-top: 14px; color: var(--danger); font-size: 13px; }
.hidden { display: none !important; }

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 40px;
  transform: translateX(-50%) translateY(20px);
  background: #2a2350;
  color: #fff;
  padding: 12px 22px;
  border-radius: 14px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  box-shadow: 0 12px 34px rgba(30, 15, 70, 0.4);
  z-index: 999;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Mobile */
@media (max-width: 520px) {
  .container { padding: 30px 12px 44px; }
  .card { padding: 18px; border-radius: 18px; }
  .hero h1 { font-size: 23px; }
  .logo { width: 58px; height: 58px; }
  .code { font-size: 33px; letter-spacing: 3px; }
  .acc .acode { font-size: 23px; }
  .ring-wrap, .ring { width: 56px; height: 56px; }
  .card-title { font-size: 16px; }
}

@media (max-width: 360px) {
  .code { font-size: 28px; }
  .result { gap: 12px; padding: 14px; }
}