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

:root {
  --bg: #0f0f1a;
  --bg-surface: #1a1a2e;
  --bg-elevated: #242440;
  --border: #2a2a4a;
  --text: #e0e0e8;
  --text-muted: #8888aa;
  --accent: #4a8cff;
  --accent-hover: #5a9cff;
  --danger: #ff4a6a;
  --danger-hover: #ff6a8a;
  --radius: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --mobile-break: 700px;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  outline: none;
  width: 100%;
  transition: border-color 0.2s;
}
input:focus, textarea:focus {
  border-color: var(--accent);
}
textarea {
  resize: vertical;
  min-height: 60px;
}

label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-surface);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover {
  background: var(--bg-elevated);
  border-color: var(--accent);
}
.btn:active {
  transform: scale(0.98);
}
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.btn-danger {
  border-color: var(--danger);
  color: var(--danger);
}
.btn-danger:hover {
  background: var(--danger);
  color: #fff;
}
.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}
.btn-icon {
  padding: 4px 8px;
  font-size: 15px;
  border: none;
  background: transparent;
}
.btn-back {
  display: none;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
}

.form-group {
  margin-bottom: 18px;
}
.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 22px;
}
.form-actions .btn { flex: 1; }

.error {
  color: var(--danger);
  font-size: 14px;
  margin: 8px 0;
}
.error-text { color: var(--danger); }

/* --- Login View --- */

.view {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.login-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 44px 36px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow);
}

.login-card h1 {
  font-size: 34px;
  text-align: center;
  margin-bottom: 2px;
  letter-spacing: 3px;
}
.login-card .subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 36px;
  font-size: 14px;
}

/* --- Vault Layout --- */

.vault-layout {
  display: flex;
  height: 100vh;
  width: 100%;
}

.sidebar {
  width: 300px;
  min-width: 260px;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  padding: 14px;
  border-bottom: 1px solid var(--border);
}

.search-input {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 10px 14px;
  width: 100%;
}

.entry-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  -webkit-overflow-scrolling: touch;
}

.entry-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.1s;
  margin-bottom: 3px;
}
.entry-item:hover { background: var(--bg-elevated); }
.entry-item.selected { background: var(--accent); color: #fff; }
.entry-item.selected .entry-user { color: rgba(255,255,255,0.7); }

.entry-icon { font-size: 17px; width: 28px; text-align: center; flex-shrink: 0; }
.entry-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; font-size: 14px; }
.entry-user { font-size: 12px; color: var(--text-muted); max-width: 80px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.entry-add {
  border: 1px dashed var(--border);
  color: var(--text-muted);
  margin-top: 8px;
}
.entry-add:hover { color: var(--accent); border-color: var(--accent); }

.main-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
  gap: 10px;
}
.topbar h2 {
  font-size: 16px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}
.topbar-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.detail-panel {
  flex: 1;
  overflow-y: auto;
  padding: 28px;
  -webkit-overflow-scrolling: touch;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  height: 100%;
  color: var(--text-muted);
  font-size: 15px;
}

/* --- Entry Detail --- */

.entry-detail, .entry-form {
  max-width: 680px;
}

.detail-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.detail-header h3 {
  font-size: 22px;
  word-break: break-word;
  flex: 1;
  min-width: 0;
}
.detail-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.field-row {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.field-row:last-child { border-bottom: none; }
.field-row label {
  width: 80px;
  flex-shrink: 0;
  padding-top: 3px;
}
.field-row > span, .field-row > pre {
  flex: 1;
  word-break: break-all;
  min-width: 0;
}

.password-field {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.notes-text {
  font-family: inherit;
  font-size: inherit;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}

.btn-copy {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 5px;
  cursor: pointer;
  padding: 3px 8px;
  font-size: 14px;
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.btn-copy:hover { opacity: 1; }
.btn-copy:active { opacity: 1; background: var(--bg-elevated); }

.detail-meta {
  margin-top: 28px;
  font-size: 12px;
  color: var(--text-muted);
}

/* --- Entry Form --- */

.entry-form h3 {
  margin-bottom: 24px;
  font-size: 20px;
}

.password-input-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.password-input-row input { flex: 1; min-width: 140px; }
.password-input-row .btn { flex-shrink: 0; }

/* --- Modal --- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
  animation: fadeIn 0.15s;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  width: 100%;
  max-width: 460px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
  animation: slideUp 0.2s;
}
.modal h3 {
  margin-bottom: 22px;
  font-size: 19px;
}
.modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 22px;
  flex-wrap: wrap;
}
.modal-actions .btn { flex: 1; min-width: 80px; }

.generated-password {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-family: "SF Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
  font-size: 20px;
  text-align: center;
  letter-spacing: 1px;
  word-break: break-all;
  margin-bottom: 18px;
  user-select: all;
}

.gen-options {
  margin-bottom: 8px;
}
.gen-options .form-group { margin-bottom: 14px; }
.gen-options input[type="range"] {
  padding: 0;
  height: 32px;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
}
.gen-options input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
}
.gen-options input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: -8px;
  cursor: pointer;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 5px 0;
  font-size: 14px;
  color: var(--text);
  text-transform: none;
  font-weight: 400;
  letter-spacing: 0;
  cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

/* --- Toast --- */

.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 14px;
  opacity: 0;
  transition: all 0.2s;
  z-index: 2000;
  pointer-events: none;
  white-space: nowrap;
}
.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes slideUp {
  from { transform: translateY(12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* --- Mobile Responsive --- */
@media (max-width: 700px) {
  html, body { font-size: 15px; }

  input, textarea, select { padding: 12px 14px; font-size: 16px; }

  .btn { padding: 11px 20px; font-size: 15px; }
  .btn-sm { padding: 8px 14px; font-size: 14px; }

  .view { padding: 16px; }

  .login-card {
    padding: 32px 24px;
    border-radius: 12px;
  }
  .login-card h1 { font-size: 30px; }

  /* Mobile vault: single-column with view switching */
  .vault-layout { flex-direction: column; }

  .sidebar {
    width: 100%;
    min-width: 0;
    flex: 1;
  }

  .main-panel {
    display: none;
    flex: 1;
  }

  /* When viewing an entry, hide list, show detail */
  .vault-layout.mobile-detail .sidebar { display: none; }
  .vault-layout.mobile-detail .main-panel { display: flex; }

  .btn-back { display: inline-flex; }

  .topbar {
    padding: 12px 16px;
  }
  .topbar-actions { gap: 6px; }

  .detail-panel { padding: 20px 16px; }

  .detail-header { flex-direction: column; }
  .detail-header h3 { font-size: 20px; }
  .detail-actions { width: 100%; }
  .detail-actions .btn { flex: 1; }

  .field-row { flex-direction: column; gap: 2px; padding: 12px 0; }
  .field-row label { width: auto; padding: 0; }
  .field-row > span { padding-left: 0; }

  .modal {
    max-width: 100%;
    border-radius: 14px 14px 0 0;
    max-height: 90vh;
    padding: 24px 20px;
  }
  .modal-overlay {
    align-items: flex-end;
    padding: 0;
  }

  .generated-password { font-size: 17px; padding: 12px 14px; }

  .entry-item { padding: 14px 16px; }
  .entry-name { font-size: 15px; }
}