:root {
  --bg: #0f1115;
  --bg-elev: #171a21;
  --bg-elev-2: #1f232c;
  --border: #2a2f3a;
  --text: #e7eaf0;
  --text-dim: #9aa3b2;
  --accent: #4f8cff;
  --accent-2: #6ad0c8;
  --danger: #ff6b6b;
  --success: #4cd07d;
  --radius: 12px;
  --radius-sm: 8px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

/* The `hidden` attribute must always win over component display rules
   (.modal/.local-fields use display:flex, which would otherwise override it). */
[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
}

.app {
  display: grid;
  grid-template-columns: 280px 1fr;
  height: 100vh;
  overflow: hidden;
}

/* ---------- Sidebar ---------- */
.sidebar {
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 14px;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 8px;
}
.brand__logo {
  font-size: 28px;
}
.brand__name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.brand__tag {
  font-size: 12px;
  color: var(--text-dim);
}

.tool-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
  flex: 1;
  /* Allow the list to shrink inside the flex sidebar so it scrolls instead of
     overflowing past the viewport (otherwise the bottom items are unreachable). */
  min-height: 0;
}

.tool-category {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 6px 12px 4px;
  margin-top: 10px;
}
.tool-category::after {
  content: "";
  flex: 1;
  border-top: 1px dashed var(--border);
}
.tool-category:first-child {
  margin-top: 0;
}

.tool-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
}
.tool-item:hover {
  background: var(--bg-elev-2);
  color: var(--text);
}
.tool-item.active {
  background: linear-gradient(
    90deg,
    rgba(79, 140, 255, 0.18),
    rgba(106, 208, 200, 0.08)
  );
  color: var(--text);
  border-color: rgba(79, 140, 255, 0.4);
}
.tool-item__icon {
  font-size: 16px;
}

.settings-btn {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
}
.settings-btn:hover {
  color: var(--text);
}

/* ---------- Main ---------- */
.main {
  display: flex;
  flex-direction: column;
  padding: 22px 26px;
  gap: 16px;
  overflow-y: auto;
}

.main__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.tool-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  margin: 0;
}

.mode-badge {
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  white-space: nowrap;
}
.mode-badge--server {
  color: var(--accent-2);
  background: rgba(106, 208, 200, 0.08);
}
.mode-badge--local {
  color: var(--accent);
  background: rgba(79, 140, 255, 0.1);
}

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.panel--output {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 200px;
}
.panel__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.field-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: 14px;
  line-height: 1.5;
  resize: vertical;
  font-family: inherit;
}
.input--single {
  resize: none;
}
.input:focus {
  outline: none;
  border-color: var(--accent);
}

/* ---------- Attachments ---------- */
.panel--input {
  position: relative;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.input-panel--drag {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(79, 140, 255, 0.25) inset;
}

.input-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}
.input-head .field-label {
  margin-bottom: 0;
}
.attach-list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.attach-list:empty {
  margin: 0;
}
.attach-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: 260px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 8px 5px 12px;
  font-size: 13px;
}
.attach-chip__icon {
  flex: 0 0 auto;
}
.attach-chip__name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.attach-chip__size {
  color: var(--text-dim);
  font-size: 11px;
  flex: 0 0 auto;
}
.attach-chip__remove {
  flex: 0 0 auto;
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
  padding: 2px;
  border-radius: 50%;
}
.attach-chip__remove:hover {
  color: var(--danger);
}

.actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
}
.hint {
  font-size: 12px;
  color: var(--text-dim);
  margin-right: auto;
}

.btn {
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: filter 0.15s, background 0.15s;
}
.btn--sm {
  padding: 6px 12px;
  font-size: 13px;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
}
.btn--primary:hover {
  filter: brightness(1.1);
}
.btn--primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text-dim);
}
.btn--ghost:hover {
  color: var(--text);
  background: var(--bg-elev-2);
}

.status {
  margin-top: 10px;
  font-size: 13px;
  min-height: 18px;
}
.status--info {
  color: var(--text-dim);
}
.status--error {
  color: var(--danger);
}
.status--success {
  color: var(--success);
}

.output {
  flex: 1;
  margin: 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.6;
  word-wrap: break-word;
  overflow-y: auto;
}

/* Rendered Markdown inside the output */
.output > *:first-child {
  margin-top: 0;
}
.output > *:last-child {
  margin-bottom: 0;
}
.output p {
  margin: 0 0 10px;
}
.output h1,
.output h2,
.output h3,
.output h4 {
  margin: 16px 0 8px;
  line-height: 1.3;
}
.output h1 {
  font-size: 19px;
}
.output h2 {
  font-size: 17px;
}
.output h3 {
  font-size: 15px;
}
.output h4 {
  font-size: 14px;
  color: var(--text-dim);
}
.output ul,
.output ol {
  margin: 0 0 10px;
  padding-left: 22px;
}
.output li {
  margin: 3px 0;
}
.output li > ul,
.output li > ol {
  margin: 3px 0;
}
.output strong {
  color: #fff;
  font-weight: 700;
}
.output em {
  font-style: italic;
}
.output a {
  color: var(--accent);
}
.output code {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.92em;
}
.output pre.md-code {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  overflow-x: auto;
  margin: 0 0 12px;
}
.output pre.md-code code {
  background: none;
  border: none;
  padding: 0;
}
.output hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 14px 0;
}
.output table.md-table {
  border-collapse: collapse;
  width: 100%;
  margin: 0 0 12px;
  font-size: 13px;
}
.output table.md-table th,
.output table.md-table td {
  border: 1px solid var(--border);
  padding: 7px 10px;
  text-align: left;
  vertical-align: top;
}
.output table.md-table th {
  background: var(--bg-elev-2);
  font-weight: 700;
}

/* ---------- Modal ---------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}
.modal__card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  max-height: 90vh;
}
.modal__header,
.modal__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
}
.modal__header {
  border-bottom: 1px solid var(--border);
}
.modal__header h2 {
  margin: 0;
  font-size: 18px;
}
.modal__footer {
  border-top: 1px solid var(--border);
  gap: 10px;
}
.modal__body {
  padding: 20px;
  overflow-y: auto;
}
.modal__desc {
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
}
.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 16px;
  cursor: pointer;
}
.icon-btn:hover {
  color: var(--text);
}

.mode-group {
  border: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.mode-option {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.mode-option input {
  margin-top: 3px;
}
.mode-option strong {
  display: block;
  font-size: 14px;
}
.mode-option span {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
  line-height: 1.4;
}

.local-fields {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.field {
  display: flex;
  flex-direction: column;
}
.select {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 14px;
}
.select:focus {
  outline: none;
  border-color: var(--accent);
}
.key-link {
  font-size: 12px;
  color: var(--accent);
  margin-top: 8px;
  text-decoration: none;
}
.key-link:hover {
  text-decoration: underline;
}

/* ---------- Mobile drawer chrome (hidden on desktop) ---------- */
.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 18px;
  line-height: 1;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex: 0 0 auto;
}
.menu-toggle:hover {
  background: var(--border);
}
.sidebar-backdrop {
  display: none;
}

/* Desktop / tablet: collapsing hides the sidebar and reclaims the space. */
@media (min-width: 721px) {
  .app.nav-collapsed {
    grid-template-columns: 1fr;
  }
  .app.nav-collapsed .sidebar {
    display: none;
  }
}

/* ---------- Tablet: keep the sidebar, make it narrower ---------- */
@media (max-width: 1024px) {
  .app {
    grid-template-columns: 220px 1fr;
  }
  .main {
    padding: 18px 18px;
  }
  .tool-heading {
    font-size: 19px;
  }
}

/* ---------- Mobile: sidebar becomes a slide-in drawer ---------- */
@media (max-width: 720px) {
  .app {
    grid-template-columns: 1fr;
  }
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(82vw, 300px);
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.45);
  }
  .sidebar--open {
    transform: translateX(0);
  }
  .sidebar-backdrop:not([hidden]) {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 150;
  }
  .main {
    padding: 14px;
    gap: 12px;
  }
  .main__header {
    gap: 10px;
  }
  .tool-heading {
    font-size: 17px;
  }
  .mode-badge {
    font-size: 11px;
    padding: 5px 9px;
  }
  .actions {
    flex-wrap: wrap;
  }
  .hint {
    flex-basis: 100%;
    margin-left: 0;
  }
  .modal {
    padding: 12px;
  }
}

/* ---------- Small phones ---------- */
@media (max-width: 380px) {
  .main {
    padding: 10px;
  }
  .btn {
    padding: 10px 14px;
  }
}