body[data-tool="base64-tools"] {
  --b64-ink: #16121c;
  --b64-muted: #6b6578;
  --b64-line: rgba(88, 60, 140, 0.12);
  --b64-soft: rgba(124, 58, 237, 0.07);
  --b64-ok: #059669;
  --b64-err: #dc2626;
}

body[data-tool="base64-tools"] .tool-workspace {
  padding: 0 0 2rem !important;
  background:
    radial-gradient(ellipse 85% 50% at 8% -8%, rgba(6, 182, 212, 0.09), transparent 55%),
    radial-gradient(ellipse 55% 40% at 95% 0%, rgba(124, 58, 237, 0.09), transparent 50%),
    linear-gradient(180deg, #f8f7fc 0%, #f2f4fa 100%) !important;
}

body[data-tool="base64-tools"] .b64-page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

body[data-tool="base64-tools"] .b64-intro {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto 1.5rem;
}

body[data-tool="base64-tools"] .b64-intro h1 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--b64-ink);
}

body[data-tool="base64-tools"] .b64-intro p {
  margin: 0.5rem 0 0;
  font-size: 0.95rem;
  color: var(--b64-muted);
  line-height: 1.55;
}

body[data-tool="base64-tools"] .b64-studio {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items: stretch;
}

body[data-tool="base64-tools"] .b64-panel {
  display: flex;
  flex-direction: column;
  min-height: 540px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--b64-line);
  border-radius: 16px;
  box-shadow: 0 10px 36px rgba(15, 23, 42, 0.05);
  overflow: hidden;
}

body[data-tool="base64-tools"] .b64-panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--b64-line);
  background: rgba(255, 255, 255, 0.98);
}

body[data-tool="base64-tools"] .b64-panel-head h2 {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--b64-ink);
}

body[data-tool="base64-tools"] .b64-mode {
  display: inline-flex;
  padding: 0.2rem;
  border-radius: 999px;
  background: var(--b64-soft);
  border: 1px solid var(--b64-line);
  gap: 0.15rem;
}

body[data-tool="base64-tools"] .b64-mode button {
  border: none;
  background: transparent;
  color: var(--b64-muted);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 650;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

body[data-tool="base64-tools"] .b64-mode button.is-on {
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.14);
}

body[data-tool="base64-tools"] .b64-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 0.85rem 1rem 1rem;
  min-height: 0;
}

body[data-tool="base64-tools"] .b64-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--b64-muted);
}

body[data-tool="base64-tools"] .b64-meta .valid { color: var(--b64-ok); font-weight: 650; }
body[data-tool="base64-tools"] .b64-meta .invalid { color: var(--b64-err); font-weight: 650; }

body[data-tool="base64-tools"] .b64-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.78rem;
  color: var(--b64-muted);
}

body[data-tool="base64-tools"] .b64-options label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
  user-select: none;
}

body[data-tool="base64-tools"] .b64-options input { accent-color: var(--primary); }

body[data-tool="base64-tools"] .b64-editor,
body[data-tool="base64-tools"] .b64-out {
  flex: 1;
  min-height: 220px;
  width: 100%;
  resize: vertical;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--b64-line);
  border-radius: 12px;
  background: #fafafa;
  color: var(--b64-ink);
  font-family: ui-monospace, "Cascadia Code", "Consolas", monospace;
  font-size: 0.8125rem;
  line-height: 1.55;
  word-break: break-all;
}

body[data-tool="base64-tools"] .b64-editor:focus {
  outline: none;
  border-color: rgba(124, 58, 237, 0.45);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
  background: #fff;
}

body[data-tool="base64-tools"] .b64-out {
  margin: 0;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  user-select: text;
  resize: none;
}

body[data-tool="base64-tools"] .b64-out.is-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--b64-muted);
  font-family: var(--font);
  font-size: 0.875rem;
  text-align: center;
}

body[data-tool="base64-tools"] .b64-preview {
  display: none;
  margin-top: 0.35rem;
  padding: 0.65rem;
  border: 1px solid var(--b64-line);
  border-radius: 12px;
  background: #fff;
  text-align: center;
}

body[data-tool="base64-tools"] .b64-preview.is-on { display: block; }

body[data-tool="base64-tools"] .b64-preview img {
  max-width: 100%;
  max-height: 220px;
  border-radius: 8px;
}

body[data-tool="base64-tools"] .b64-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

body[data-tool="base64-tools"] .b64-text-btn {
  border: 1px solid var(--b64-line);
  background: #fff;
  color: var(--b64-muted);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
}

body[data-tool="base64-tools"] .b64-text-btn:hover {
  border-color: rgba(124, 58, 237, 0.35);
  color: var(--primary);
  background: var(--b64-soft);
}

body[data-tool="base64-tools"] .b64-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

body[data-tool="base64-tools"] .b64-status {
  margin: 0;
  font-size: 0.8rem;
  color: var(--b64-muted);
}

body[data-tool="base64-tools"] .b64-status.is-ok { color: var(--b64-ok); }
body[data-tool="base64-tools"] .b64-status.is-err { color: var(--b64-err); }

body[data-tool="base64-tools"] .b64-file-chip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.75rem;
  border-radius: 10px;
  border: 1px dashed var(--b64-line);
  background: var(--b64-soft);
  font-size: 0.78rem;
  color: var(--b64-ink);
}

body[data-tool="base64-tools"] input[type="file"] { display: none; }

@media (max-width: 900px) {
  body[data-tool="base64-tools"] .b64-studio { grid-template-columns: 1fr; }
  body[data-tool="base64-tools"] .b64-panel { min-height: auto; }
}