:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel-2: #f0f2f5;
  --text: #181a1f;
  --muted: #6f7682;
  --line: #d8dde5;
  --accent: #1f5fff;
  --accent-text: #ffffff;
  --danger-bg: #ffe8e8;
  --danger-text: #8c1d1d;
}

:root[data-theme="dark"] {
  --bg: #111317;
  --panel: #1a1d23;
  --panel-2: #22262e;
  --text: #eceff4;
  --muted: #9da4b0;
  --line: #303745;
  --accent: #7aa2ff;
  --accent-text: #111317;
  --danger-bg: #3a1f1f;
  --danger-text: #ffb3b3;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  background: radial-gradient(1000px 500px at 100% -10%, color-mix(in srgb, var(--accent) 12%, transparent), transparent), var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
}

.brand { font-weight: 700; letter-spacing: 0.02em; }
.top-actions { display: flex; align-items: center; gap: 8px; }
.lang-switch {
  position: relative;
}
.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 170px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 6px;
  display: grid;
  gap: 4px;
  z-index: 120;
}
.lang-menu.hidden {
  display: none;
}
.lang-menu form {
  margin: 0;
}
.lang-item {
  width: 100%;
  text-align: left;
}
.lang-item.active {
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  border-color: color-mix(in srgb, var(--accent) 70%, var(--line));
}
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
}
.icon-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.container { max-width: 1080px; margin: 24px auto; padding: 0 16px 24px; }
.layout { display: grid; grid-template-columns: repeat(2, minmax(280px, 1fr)); gap: 16px; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}

.client-bar {
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.auth-card { max-width: 420px; margin: 60px auto; }
.manual-card { margin-bottom: 16px; }
.saved-file-card { margin-bottom: 16px; }

h1, h2 { margin: 0 0 6px; }
.muted { color: var(--muted); font-size: 14px; margin: 0 0 10px; }

.grid { display: grid; }
.gap { gap: 10px; }

label { display: grid; gap: 6px; font-size: 14px; }
.checkbox-inline {
  display: flex;
  align-items: center;
  gap: 8px;
}
.checkbox-inline input {
  width: auto;
  margin: 0;
}
.subtle-indent {
  margin-left: 20px;
}

input, button, select {
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  padding: 10px 12px;
  font-size: 14px;
}

button {
  cursor: pointer;
  background: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 70%, var(--line));
  color: var(--accent-text);
  font-weight: 600;
}

button:disabled { opacity: 0.5; cursor: not-allowed; }
button.ghost { background: transparent; color: var(--text); }

hr { border: none; border-top: 1px solid var(--line); margin: 14px 0; }
.row { display: flex; align-items: center; }
.between { justify-content: space-between; }
.wrap { flex-wrap: wrap; }

.candidate-list {
  border: 1px solid var(--line);
  border-radius: 10px;
  max-height: 280px;
  overflow: auto;
  padding: 8px;
  background: color-mix(in srgb, var(--panel-2) 80%, var(--panel));
}

.candidate-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-bottom: 1px solid var(--line);
}

.candidate-row:last-child { border-bottom: none; }

.manual-toolbar {
  gap: 8px;
  margin-bottom: 10px;
}

.saved-file-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.passkey-list {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.passkey-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: color-mix(in srgb, var(--panel-2) 70%, var(--panel));
}

.passkey-meta {
  min-width: 0;
  overflow-wrap: anywhere;
}

.settings-modal {
  position: fixed;
  inset: 0;
  z-index: 60;
}

.settings-modal.hidden {
  display: none;
}

.settings-backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, #000 45%, transparent);
}

.settings-dialog {
  position: relative;
  margin: 4vh auto;
  width: min(1100px, calc(100vw - 24px));
  max-height: 92vh;
  overflow: auto;
}

.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.settings-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 14px;
}

.settings-nav {
  display: grid;
  gap: 8px;
  align-content: start;
}

.settings-tab-btn {
  text-align: left;
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}

.settings-tab-btn.active {
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  border-color: color-mix(in srgb, var(--accent) 70%, var(--line));
}

.settings-content {
  display: grid;
  gap: 12px;
}

.settings-tab {
  display: none;
  gap: 12px;
}

.settings-tab.active {
  display: grid;
}

.inner-card {
  padding: 14px;
}

.inner-card h3 {
  margin: 0 0 6px;
}

.manual-table-wrap {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: auto;
  background: color-mix(in srgb, var(--panel-2) 80%, var(--panel));
}

.manual-table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
}

.manual-table th,
.manual-table td {
  border-bottom: 1px solid var(--line);
  padding: 8px;
  text-align: left;
  vertical-align: middle;
}

.manual-table th {
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
}

.manual-table td input {
  width: 100%;
}

.alert {
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 12px;
  font-size: 14px;
}

.alert.error {
  background: var(--danger-bg);
  color: var(--danger-text);
  border: 1px solid color-mix(in srgb, var(--danger-text) 40%, var(--line));
}

.alert.success {
  background: color-mix(in srgb, #2e8b57 22%, transparent);
  color: #d7ffe8;
  border: 1px solid color-mix(in srgb, #2e8b57 45%, var(--line));
}

body.modal-open {
  overflow: hidden;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .settings-layout { grid-template-columns: 1fr; }
}