:root {
  --bg: #f6f7f8;
  --panel: #ffffff;
  --panel-2: #fafafa;
  --border: #e3e5e8;
  --border-strong: #cdd1d6;
  --text: #1f2328;
  --text-2: #3a4047;
  --muted: #6b7280;
  --accent: #1f2328;
  --accent-fg: #ffffff;
  --link: #2563eb;
  --danger: #b91c1c;
  --danger-bg: #fef2f2;
  --ok: #15803d;
  --radius: 6px;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.45;
  min-height: 100vh;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 16px 24px;
}

header { margin-bottom: 18px; }

h1 {
  margin: 0 0 4px;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

form {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
}

input[type="text"] {
  flex: 1;
  min-width: 0;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 8px 10px;
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
  font-family: inherit;
}

input[type="text"]:focus { border-color: var(--accent); }
input[type="text"]::placeholder { color: #9aa1ab; }

button {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 500;
  font-size: 13px;
  padding: 8px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: inherit;
  transition: opacity 0.15s, background 0.15s;
}
button:hover:not(:disabled) { opacity: 0.85; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

button.ghost {
  background: var(--panel);
  color: var(--text-2);
  border-color: var(--border-strong);
}
button.ghost:hover:not(:disabled) { background: var(--panel-2); opacity: 1; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 12px;
}

.panel-head {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  font-size: 12px;
}

.hidden { display: none !important; }
.grow { flex: 1; }

.label {
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.muted { color: var(--muted); }
.mono {
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: 12px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  animation: pulse 1.2s ease-in-out infinite;
}
.panel.log[data-status="done"] .dot { background: var(--ok); animation: none; }
.panel.log[data-status="error"] .dot { background: var(--danger); animation: none; }

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

.log-body {
  margin: 0;
  max-height: 280px;
  overflow-y: auto;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 10px;
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: 11.5px;
  line-height: 1.55;
  color: var(--text-2);
  white-space: pre-wrap;
  word-break: break-all;
}

.log-line { display: block; }
.log-line.new { animation: fadeIn 0.25s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-1px); } to { opacity: 1; transform: none; } }

.log-time { color: var(--muted); margin-right: 6px; }

.final-link {
  display: block;
  color: var(--link);
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: 13px;
  text-decoration: none;
  word-break: break-all;
  padding: 8px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
}
.final-link:hover { text-decoration: underline; }

.actions {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
}

details {
  margin-top: 6px;
  border-top: 1px solid var(--border);
  padding-top: 8px;
  font-size: 12px;
}
summary {
  cursor: pointer;
  color: var(--muted);
  user-select: none;
  padding: 2px 0;
}
summary:hover { color: var(--text-2); }

ol#chain {
  margin: 6px 0 0 18px;
  padding: 0;
  color: var(--text-2);
  word-break: break-all;
}
ol#chain li { margin: 2px 0; }

.error {
  border-color: var(--danger);
  background: var(--danger-bg);
  color: var(--danger);
  display: flex;
  gap: 8px;
  align-items: baseline;
}

footer {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}
footer a { color: var(--text-2); text-decoration: none; }
footer a:hover { text-decoration: underline; }
footer strong { color: var(--text); font-weight: 600; }

.toast {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--accent-fg);
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 12px;
  opacity: 0;
  transition: opacity 0.18s, transform 0.18s;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translate(-50%, -4px); }

/* ===== Auth gate ===== */

.gate {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--bg);
  z-index: 10;
}
.gate-inner {
  width: 100%;
  max-width: 360px;
  padding: 0 16px;
}
.gate-title {
  text-align: center;
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
.gate-row {
  display: flex;
  gap: 6px;
}
.gate-row input {
  flex: 1;
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 9px 12px;
  font-size: 14px;
  outline: none;
  color: var(--text);
  font-family: inherit;
}
.gate-row input:focus { border-color: var(--accent); }
.gate-error {
  margin-top: 8px;
  padding: 8px 10px;
  background: var(--danger-bg);
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: var(--radius);
  font-size: 12.5px;
}

/* ===== App header + tabs ===== */

.app-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.app-head h1 { margin: 0; }
.tabs {
  display: flex;
  gap: 4px;
  margin-left: 8px;
}
.tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: inherit;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--text);
  background: var(--panel);
  border-color: var(--border);
}

button.ghost.sm,
button.sm {
  padding: 4px 9px;
  font-size: 12px;
  height: auto;
}

.app-head .ghost.sm { margin-left: auto; }

.tab-panel { display: block; }
.tab-panel[hidden] { display: none; }

/* ===== Management ===== */

.gen-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.gen-field {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 11px;
  color: var(--muted);
}
.gen-field span {
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
}
.gen-field input {
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 7px 10px;
  font-size: 13px;
  outline: none;
  color: var(--text);
  font-family: inherit;
  width: 90px;
}
.gen-field input:focus { border-color: var(--accent); }

.codes-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 360px;
  overflow-y: auto;
}
.code-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: 12px;
}
.code-row.expired { opacity: 0.55; }
.code-row .code {
  font-weight: 600;
  letter-spacing: 0.05em;
  font-size: 13px;
  color: var(--text);
}
.code-row .meta {
  color: var(--muted);
  font-size: 11px;
  flex: 1;
}
.code-row .pill {
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--border-strong);
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.code-row.expired .pill { color: var(--danger); border-color: var(--danger); background: var(--danger-bg); }
.code-row .revoke-btn {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--muted);
  padding: 2px 8px;
  font-size: 11px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: inherit;
}
.code-row .revoke-btn:hover { color: var(--danger); border-color: var(--danger); }

.codes-empty {
  color: var(--muted);
  font-size: 12.5px;
  padding: 8px 0;
  text-align: center;
}