:root {
  --green: #035717;
  --green-2: #067a2a;
  --green-line: #d6ebe0;
  --ink: #12241a;
  --muted: #5c6b62;
  --bg: #eef2ee;
  --card: #ffffff;
  --danger: #b3261e;
  --radius: 16px;
  --shadow: 0 6px 24px rgba(3, 87, 23, 0.10);
  --code: #037a2e;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, "Segoe UI", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.app { min-height: 100vh; }

.view { max-width: 460px; margin: 0 auto; padding: 20px 16px 48px; }
.center { min-height: 70vh; display: grid; place-items: center; }

.spinner {
  width: 42px; height: 42px; border-radius: 50%;
  border: 4px solid var(--green-line); border-top-color: var(--green);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- brand ---------- */
.brand { display: flex; align-items: center; gap: 10px; justify-content: center; margin-bottom: 6px; }
.brand h1 { margin: 0; color: var(--green); font-size: 34px; letter-spacing: 1px; }
.brand.small h1 { font-size: 24px; }
.brand-mark {
  display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--green); color: #fff; font-weight: 700; font-size: 22px;
}
.brand.small .brand-mark { width: 32px; height: 32px; font-size: 18px; }

/* ---------- cards / auth ---------- */
.card {
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 24px;
}
.auth-card { margin-top: 8vh; }
.muted { color: var(--muted); text-align: center; margin: 8px 0 20px; }

form label { display: block; font-size: 14px; color: var(--muted); margin-bottom: 14px; }
input[type=password], input[type=text] {
  width: 100%; margin-top: 6px; padding: 12px 14px;
  border: 1.5px solid #d7dcd8; border-radius: 12px;
  font-size: 17px; color: var(--ink); background: #fbfdfb;
  font-family: inherit;
}
input:focus { outline: none; border-color: var(--green-2); background: #fff; }
#add-code { letter-spacing: 1px; font-variant-ligatures: none; }

.hint { font-size: 12.5px; color: var(--muted); margin: -4px 0 14px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: none; border-radius: 12px; padding: 12px 18px;
  font-size: 16px; font-family: inherit; font-weight: 600; cursor: pointer;
  transition: transform .05s ease, background .15s ease, opacity .15s ease;
}
.btn:active { transform: scale(.98); }
.btn.primary { background: var(--green); color: #fff; width: 100%; }
.btn.primary:hover { background: var(--green-2); }
.btn.primary:disabled { opacity: .6; cursor: default; }
.btn.ghost { background: transparent; color: var(--muted); padding: 8px 12px; }
.btn.ghost:hover { color: var(--ink); }

.msg { min-height: 18px; color: var(--danger); font-size: 13.5px; margin-bottom: 12px; text-align: center; }
.msg.ok { color: var(--green-2); }

/* ---------- topbar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 18px;
}

/* ---------- account cards ---------- */
.accounts { display: flex; flex-direction: column; gap: 14px; }

.acct {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 16px 18px;
}
.acct-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.acct-name { font-size: 16px; font-weight: 600; color: var(--ink); word-break: break-word; }
.acct-del {
  border: none; background: transparent; color: #c2ccc5; cursor: pointer;
  font-size: 20px; line-height: 1; padding: 4px 6px; border-radius: 8px;
}
.acct-del:hover { color: var(--danger); background: #fbeceb; }

.acct-body { margin-top: 12px; }

.show-row { display: flex; }
.btn.show {
  background: #eaf5ee; color: var(--green); width: 100%;
  border: 1.5px solid var(--green-line); font-size: 17px; padding: 14px;
}
.btn.show:hover { background: #e0f0e6; }

.code-row {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
}
.code {
  font-family: "Lucida Console", "Courier New", monospace;
  font-size: 40px; font-weight: 700; color: var(--code);
  letter-spacing: 3px; direction: ltr; user-select: all;
}
.code.stale { color: #c0c8c3; }
.code-actions { display: flex; align-items: center; gap: 12px; }

.copy-btn {
  border: none; background: #eaf5ee; color: var(--green); cursor: pointer;
  border-radius: 10px; padding: 9px 14px; font-size: 14px; font-weight: 600;
  font-family: inherit;
}
.copy-btn:hover { background: #dcefe3; }
.copy-btn.copied { background: var(--green); color: #fff; }

/* countdown ring */
.ring { width: 44px; height: 44px; flex: 0 0 auto; }
.ring circle { fill: none; stroke-width: 5; }
.ring .track { stroke: var(--green-line); }
.ring .prog {
  stroke: var(--green-2); stroke-linecap: round;
  transform: rotate(-90deg); transform-origin: 50% 50%;
  transition: stroke-dashoffset .95s linear, stroke .3s ease;
}
.ring .prog.low { stroke: #d99a00; }
.ring-txt { font-size: 13px; font-weight: 700; fill: var(--muted); }

/* ---------- add panel ---------- */
.add-panel {
  margin-top: 18px; background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 4px 18px; overflow: hidden;
}
.add-panel summary {
  cursor: pointer; padding: 14px 0; font-weight: 600; color: var(--green);
  list-style: none;
}
.add-panel summary::-webkit-details-marker { display: none; }
.add-panel summary::before { content: "＋ "; font-weight: 700; }
.add-panel[open] summary::before { content: "－ "; }
.add-form { padding: 6px 0 16px; }

.empty { text-align: center; color: var(--muted); padding: 20px 10px; }

.footnote { text-align: center; color: var(--muted); font-size: 12px; margin-top: 26px; }

@media (max-width: 380px) {
  .code { font-size: 34px; }
}