:root {
  --bg: #0a0a0d;
  --panel: #131317;
  --panel-2: #18181d;
  --border: #262630;
  --text: #e7e7ea;
  --muted: #8d8d99;
  --muted-2: #5f5f6a;
  --accent: #8f6fff;
  --accent-soft: rgba(143, 111, 255, 0.12);
  --accent-border: rgba(143, 111, 255, 0.35);
  --danger: #ff6b6b;
  --success: #5fd68a;
  --radius: 6px;
  --font-ui: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

button {
  font-family: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- Topbar ---------- */

.topbar {
  height: 56px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 30;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
}

.brand { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--text);
}
.brand-sub {
  font-size: 11.5px;
  color: var(--muted);
}

.oxis-link {
  margin-left: auto;
  font-size: 13px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.oxis-link:hover {
  color: var(--accent);
  border-color: var(--accent-border);
  text-decoration: none;
}

/* ---------- Shell layout ---------- */

.shell {
  flex: 1 1 auto;
  display: flex;
  min-height: 0;
}

.sidebar {
  flex: 0 0 260px;
  border-right: 1px solid var(--border);
  background: var(--panel);
  overflow-y: auto;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
}

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

.search-input {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 8px 10px;
  font-size: 13px;
}
.search-input::placeholder { color: var(--muted-2); }
.search-input:focus { border-color: var(--accent-border); }

.tool-list {
  list-style: none;
  margin: 0;
  padding: 8px;
  overflow-y: auto;
}

.tool-item button {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--muted);
  padding: 9px 10px;
  font-size: 13.5px;
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 2px;
  transition: background 0.12s ease, color 0.12s ease;
}

.tool-item button svg { flex: 0 0 auto; opacity: 0.85; }

.tool-item button:hover {
  background: var(--panel-2);
  color: var(--text);
}

.tool-item.active button {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--text);
}

.tool-item.hidden { display: none; }

.no-results {
  padding: 10px;
  font-size: 12.5px;
  color: var(--muted-2);
}

.sidebar-overlay {
  display: none;
}

/* ---------- Workspace ---------- */

.workspace {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 28px 32px 60px;
}

.tool-panel {
  max-width: 880px;
}

.tool-header {
  margin-bottom: 20px;
}

.tool-header h1 {
  font-size: 19px;
  margin: 0 0 4px;
  font-weight: 600;
}

.tool-header p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
}

.notice {
  font-size: 12.5px;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 9px 12px;
  margin-bottom: 18px;
}

.field-label {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}

textarea.io, input.io {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 12px;
  resize: vertical;
}

textarea.io { min-height: 160px; line-height: 1.5; }

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

select.io {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 8px 10px;
  font-size: 13px;
}

.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.row + .row { margin-top: 12px; }
.stack { display: flex; flex-direction: column; gap: 14px; }

.btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 8px 14px;
  font-size: 13px;
  transition: border-color 0.12s ease, background 0.12s ease;
}
.btn:hover { border-color: var(--accent-border); }

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0a0a0d;
  font-weight: 600;
}
.btn.primary:hover { filter: brightness(1.08); }

.btn.ghost {
  background: transparent;
}

.btn:disabled { opacity: 0.45; cursor: default; }

.error-box {
  border: 1px solid rgba(255, 107, 107, 0.35);
  background: rgba(255, 107, 107, 0.08);
  color: var(--danger);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: 12.5px;
  font-family: var(--font-mono);
  white-space: pre-wrap;
}

.success-box {
  border: 1px solid rgba(95, 214, 138, 0.35);
  background: rgba(95, 214, 138, 0.08);
  color: var(--success);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: 12.5px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.hash-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
}
.hash-label {
  width: 76px;
  flex: 0 0 auto;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
}
.hash-value {
  flex: 1 1 auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  word-break: break-all;
  color: var(--text);
}
.legacy-tag {
  font-size: 10.5px;
  color: var(--muted-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}

.color-swatch {
  width: 100%;
  height: 90px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.uuid-list {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 0;
  max-height: 320px;
  overflow-y: auto;
}
.uuid-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 12px;
  border-bottom: 1px solid var(--border);
}
.uuid-row:last-child { border-bottom: none; }
.uuid-row span { word-break: break-all; }
.copy-mini {
  flex: 0 0 auto;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 4px;
  font-size: 11px;
  padding: 3px 7px;
}
.copy-mini:hover { color: var(--accent); border-color: var(--accent-border); }

.match-count {
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 8px;
}

pre.match-view {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 100px;
  margin: 0;
}
mark.hl {
  background: var(--accent-soft);
  color: var(--text);
  border-bottom: 1px solid var(--accent-border);
  border-radius: 2px;
}

.split-editor {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.md-preview {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  min-height: 320px;
  overflow-y: auto;
  font-size: 14px;
  line-height: 1.6;
}
.md-preview h1, .md-preview h2, .md-preview h3 { line-height: 1.3; }
.md-preview code {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 0.9em;
}
.md-preview pre {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  overflow-x: auto;
}
.md-preview pre code { border: none; background: none; padding: 0; }
.md-preview blockquote {
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--accent-border);
  color: var(--muted);
}

.jwt-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.jwt-col-title {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
  font-weight: 600;
}

.footer {
  flex: 0 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: var(--panel);
  font-size: 12px;
  color: var(--muted-2);
}

.footer-links {
  display: flex;
  gap: 16px;
}

@media (max-width: 860px) {
  .split-editor, .jwt-cols, .grid-2 { grid-template-columns: 1fr; }
}

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

  .sidebar {
    position: fixed;
    top: 56px;
    left: 0;
    bottom: 0;
    width: 280px;
    max-width: 82vw;
    transform: translateX(-100%);
    transition: transform 0.18s ease;
    z-index: 40;
  }
  .sidebar.open { transform: translateX(0); }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 56px 0 0 0;
    background: rgba(0,0,0,0.5);
    z-index: 35;
  }
  .sidebar-overlay.open { display: block; }

  .workspace { padding: 18px 16px 40px; }
  .oxis-link { padding: 5px 8px; font-size: 12px; }
  .brand-sub { display: none; }
}