:root {
  --primary: #d94040;
  --hover: #b83030;
  --bg: #ffffff;
  --text: #222222;
  --card: #fafafa;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a {
  color: var(--primary);
}
a:hover {
  text-decoration: underline;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  max-width: 1000px;
  margin: 0 auto;
}

header .logo img {
  height: 30px;
  display: block;
}

header .co {
  font-size: 13px;
  color: #666;
}

.settings-toggle {
  display: none;
  position: fixed;
  top: 14px;
  right: 16px;
  z-index: 40;
  width: 38px;
  height: 38px;
  border-radius: 6px;
  border: 1px solid #ddd;
  background: #fff;
  color: #222;
  font-size: 15px;
  cursor: pointer;
}

.settings-layout {
  display: flex;
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px 24px 80px;
  gap: 32px;
  align-items: flex-start;
}

.settings-sidebar {
  width: 210px;
  flex-shrink: 0;
  background: var(--card);
  border: 1px solid #eee;
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: sticky;
  top: 24px;
}

.settings-sidebar h3 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #999;
  margin-bottom: 8px;
  padding: 0 8px;
}

.settings-sidebar .tab {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: #555;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}

.settings-sidebar .tab:hover {
  background: #f0f0f0;
  color: #222;
}

.settings-sidebar .tab.active {
  background: #222;
  color: #fff;
}

.settings-sidebar .tab.danger {
  color: var(--primary);
}

.settings-sidebar .tab.danger:hover {
  background: rgba(217, 64, 64, 0.08);
  color: var(--primary);
}

.settings-sidebar .tab.danger.active {
  background: var(--primary);
  color: #fff;
}

.settings-sidebar .back {
  margin-top: 10px;
  padding: 12px 10px 0;
  font-size: 13px;
  font-weight: 600;
  color: #999;
  text-decoration: none;
  border-top: 1px solid #eee;
}

.settings-sidebar .back:hover {
  color: #222;
  text-decoration: none;
}

.settings-content {
  flex: 1;
  min-width: 0;
}

.panel {
  display: none;
  max-width: 460px;
}

.panel.active {
  display: block;
}

.panel h1 {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #111;
  margin-bottom: 20px;
}

.panel p {
  color: #666;
  font-size: 14px;
  margin-bottom: 6px;
}

.panel h3 {
  font-size: 12px;
  font-weight: 500;
  color: #999;
}

.info {
  background: var(--card);
  border: 1px solid #eee;
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 14px;
  color: #333;
  margin-bottom: 18px;
}

.panel input[type="text"],
.panel input[type="password"] {
  width: 100%;
  padding: 11px 14px;
  margin-bottom: 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  color: #222;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.panel input[type="text"]:focus,
.panel input[type="password"]:focus {
  border-color: #222;
}

.panel input::placeholder {
  color: #999;
}

.panel input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 44px;
  height: 30px;
  border: 1px solid #ccc;
  border-radius: 6px;
  background: none;
  padding: 0;
  cursor: pointer;
  margin-bottom: 14px;
}

.panel input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 2px;
}

.panel input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 4px;
}

.panel button {
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 20px;
  border: 1px solid #222;
  border-radius: 6px;
  background: #222;
  color: #fff;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s;
}

.panel button:hover {
  background: var(--primary);
  border-color: var(--primary);
}

#deleteAccount {
  background: var(--primary);
  border-color: var(--primary);
}

#deleteAccount:hover {
  background: var(--hover);
  border-color: var(--hover);
}

#resetPrefs {
  background: #fff !important;
  color: #222 !important;
  border-color: #ddd !important;
}

#resetPrefs:hover {
  border-color: #222 !important;
  background: #fff !important;
}

#nameStatus,
#pwStatus {
  margin-top: 10px;
  font-size: 13px;
  font-weight: 600;
  min-height: 16px;
}

#nameStatus.success,
#pwStatus.success {
  color: #4caf50;
}

#nameStatus.error,
#pwStatus.error {
  color: var(--primary);
}

#cardColor:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

@media (max-width: 768px) {
  .settings-toggle {
    display: block;
  }

  .settings-layout {
    padding: 16px 16px 60px;
  }

  .settings-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 30;
    width: 230px;
    border-radius: 0;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    padding-top: 60px;
  }

  .settings-sidebar.open {
    transform: translateX(0);
  }

  .settings-content {
    width: 100%;
  }

  .panel {
    max-width: 100%;
  }
}