:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --ink: #1a2332;
  --muted: #5c6b7a;
  --line: #d7dee7;
  --accent: #0b6e4f;
  --accent-ink: #ffffff;
  --danger: #b42318;
  --ok: #0b6e4f;
  --warn: #9a6700;
  --shadow: 0 10px 30px rgba(26, 35, 50, 0.06);
  --radius: 14px;
  --font: "Source Sans 3", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: linear-gradient(160deg, #eef3f7 0%, #f8fafb 45%, #e8f2ec 100%);
  color: var(--ink);
  font-family: var(--font);
  min-height: 100%;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  width: min(980px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0 3rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  gap: 0.85rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.95rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.4rem;
  margin-bottom: 1rem;
}

.card h1, .card h2 {
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
}

.card p.lead {
  margin: 0 0 1rem;
  color: var(--muted);
}

label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="file"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  font: inherit;
  background: #fff;
  margin-bottom: 0.9rem;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 720px) {
  .row { grid-template-columns: 1fr; }
}

.btn {
  appearance: none;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font: inherit;
  font-weight: 600;
  padding: 0.7rem 1rem;
  cursor: pointer;
}

.btn.secondary {
  background: #e8eef3;
  color: var(--ink);
}

.btn.danger {
  background: var(--danger);
}

.btn:hover { filter: brightness(0.96); }

.flash {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.flash li {
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.flash .success { background: #e7f6ef; color: var(--ok); }
.flash .error { background: #fdecec; color: var(--danger); }

.meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1rem 0;
}

@media (max-width: 720px) {
  .meta { grid-template-columns: 1fr; }
}

.meta .item {
  background: #f7fafc;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem;
}

.meta .label {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 0.2rem;
}

.meta .value {
  font-weight: 700;
}

.status-ready { color: var(--ok); }
.status-converting { color: var(--warn); }
.status-error { color: var(--danger); }
.status-idle { color: var(--muted); }

.preview {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

.preview img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #111;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th, .table td {
  text-align: left;
  padding: 0.75rem 0.4rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.table th {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.inline-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.inline-form input[type="text"],
.inline-form input[type="password"] {
  width: auto;
  min-width: 120px;
  margin: 0;
}

.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.login-card {
  width: min(420px, 100%);
}

.muted { color: var(--muted); font-size: 0.92rem; }

.qr-wrap {
  display: grid;
  place-items: center;
  margin: 1rem 0;
}

.qr {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
}

.secret-key {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  word-break: break-all;
  background: #f7fafc;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
}