:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #131b2e;
  --bg-tertiary: #1d283d;
  --text-main: #f0f4f8;
  --text-muted: #8a99ad;
  --accent-blue: #3b82f6;
  --accent-blue-hover: #2563eb;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-red-hover: #dc2626;
  --border-color: #233148;
  --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --border-color: #e2e8f0;
  --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography & Helpers */
.font-mono { font-family: var(--font-mono); }
.hidden { display: none !important; }
.text-muted { color: var(--text-muted); font-size: 0.85rem; }

/* Buttons */
.btn {
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.2s, transform 0.1s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background-color: var(--accent-blue); color: #fff; }
.btn-primary:hover { background-color: var(--accent-blue-hover); }
.btn-secondary { background-color: var(--bg-tertiary); color: var(--text-main); border-color: var(--border-color); }
.btn-secondary:hover { background-color: var(--border-color); }
.btn-danger { background-color: var(--accent-red); color: #fff; }
.btn-danger:hover { background-color: var(--accent-red-hover); }
.btn-full { width: 100%; }
.btn-icon { padding: 0.5rem; background: transparent; border: none; font-size: 1.1rem; }

/* Auth / Lock Screen */
.auth-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 1.5rem;
}

.auth-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  border-radius: 16px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--card-shadow);
}

.brand-header {
  text-align: center;
  margin-bottom: 2rem;
}

.shield-icon { font-size: 3rem; margin-bottom: 0.5rem; }
.brand-header h1 { font-size: 1.6rem; font-weight: 700; }
.brand-header p { color: var(--text-muted); font-size: 0.875rem; margin-top: 0.25rem; }

/* Forms */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="url"],
select,
textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent-blue);
}

.input-with-action {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.checkbox-group, .checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
  margin-bottom: 1.25rem;
}

/* Password Strength Indicator */
.strength-meter {
  height: 6px;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 0.3rem;
}
.strength-bar {
  height: 100%;
  width: 0%;
  transition: width 0.3s, background-color 0.3s;
}
.strength-text { font-size: 0.75rem; color: var(--text-muted); }

.warning-box {
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  padding: 0.8rem;
  border-radius: 8px;
  font-size: 0.8rem;
  margin-bottom: 1.25rem;
}

/* Dashboard Layout */
.dashboard-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-left { display: flex; align-items: center; gap: 1rem; }
.vault-logo { font-weight: 700; font-size: 1.2rem; }
.header-right { display: flex; align-items: center; gap: 0.8rem; }

.badge {
  background-color: var(--bg-tertiary);
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  font-size: 0.75rem;
  border: 1px solid var(--border-color);
}
.badge-info { color: var(--accent-blue); border-color: rgba(59, 130, 246, 0.3); }

.dashboard-body {
  display: flex;
  flex: 1;
}

.sidebar {
  width: 260px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.category-nav h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
}

.category-nav ul { list-style: none; }

.category-nav li {
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: background-color 0.15s, color 0.15s;
  margin-bottom: 0.2rem;
}

.category-nav li:hover { background-color: var(--bg-tertiary); color: var(--text-main); }
.category-nav li.active { background-color: var(--accent-blue); color: #fff; font-weight: 500; }

.content-area {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

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

/* Accounts Grid & Cards */
.accounts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.account-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  box-shadow: var(--card-shadow);
  transition: border-color 0.2s;
}

.account-card:hover { border-color: var(--accent-blue); }

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.card-title-group h4 { font-size: 1.1rem; font-weight: 600; }
.card-title-group span { font-size: 0.8rem; color: var(--text-muted); }

.card-field {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  background-color: var(--bg-primary);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
}

.card-field .label { color: var(--text-muted); font-size: 0.75rem; }
.card-field .value { font-family: var(--font-mono); max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.card-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.4rem;
}

.card-actions .btn { flex: 1; padding: 0.4rem 0.6rem; font-size: 0.8rem; }

/* Modals */
.modal-backdrop {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
}

.modal-sm { max-width: 420px; }

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-close {
  background: none; border: none; font-size: 1.5rem; color: var(--text-muted); cursor: pointer;
}

#account-form, .generator-body, .settings-body {
  padding: 1.5rem;
}

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

.span-2 { grid-column: span 2; }

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* Settings Components */
.settings-section { margin-bottom: 2rem; }
.settings-section h4 {
  font-size: 0.85rem; text-transform: uppercase; color: var(--text-muted); margin-bottom: 1rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.4rem;
}
.setting-item {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; gap: 1rem;
}
.setting-item select { width: auto; }

.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-muted);
}
.empty-icon { font-size: 3rem; margin-bottom: 0.5rem; }

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  z-index: 2000;
}

.toast {
  background-color: var(--bg-tertiary);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 0.75rem 1.2rem;
  border-radius: 8px;
  font-size: 0.875rem;
  box-shadow: var(--card-shadow);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  animation: slideIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Responsive Rules */
@media (max-width: 768px) {
  .dashboard-body { flex-direction: column; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); padding: 1rem; }
  .category-nav ul { display: flex; overflow-x: auto; gap: 0.5rem; }
  .category-nav li { whitespace: nowrap; margin-bottom: 0; }
  .form-grid { grid-template-columns: 1fr; }
  .span-2 { grid-column: span 1; }
  .app-header { padding: 1rem; flex-direction: column; gap: 1rem; align-items: stretch; }
  .header-right { justify-content: space-between; }
}

/* Landing Page & Auth UI Enhancements */
.auth-landing {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  text-align: center;
}

.privacy-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  background-color: var(--bg-tertiary);
  padding: 0.8rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  line-height: 1.4;
}

.landing-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.btn-hero {
  padding: 0.85rem 1.4rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 10px;
}

.auth-switch {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.btn-link {
  background: none;
  border: none;
  color: var(--accent-blue);
  font-weight: 600;
  cursor: pointer;
  padding: 0 0.2rem;
  font-size: 0.85rem;
  text-decoration: underline;
}

.user-welcome {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-main);
  background: var(--bg-tertiary);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}