/* =========================================================================
 * Settings panel
 * ========================================================================= */

#configOverlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: cfg-fade 0.15s ease-out;
}
#configOverlay[hidden] { display: none; }

@keyframes cfg-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

#configPanel {
  background: var(--u-bg-elev);
  border: 1px solid var(--u-border-accent);
  border-radius: 8px;
  width: min(520px, 100%);
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  font-family: var(--u-sans);
}

.config-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--u-border);
  font-family: var(--u-mono);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--u-accent);
  /* Pin head to the top of the scrolling panel so the tabs strip below
     has a stable anchor. */
  position: sticky;
  top: 0;
  background: var(--u-bg-elev);
  z-index: 2;
}

.config-close {
  background: transparent;
  border: none;
  color: var(--u-text-dim);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
  transition: color 0.15s;
}
.config-close:hover { color: var(--u-text); }

/* ---------- tabs ---------- */

.config-tabs {
  display: flex;
  flex-wrap: wrap;                 /* wrap to multiple rows once tabs exceed width */
  gap: 0;
  padding: 0 18px;
  border-bottom: 1px solid var(--u-border);
  background: var(--u-bg-elev);
  /* Stay pinned below the head as the pane scrolls. top value is the
     head's own height (~47px); fine-tuned to the current design. */
  position: sticky;
  top: 47px;
  z-index: 1;
}
.config-tab {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--u-text-dim);
  font-family: var(--u-mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 10px 14px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.config-tab:hover { color: var(--u-text); }
.config-tab.is-active {
  color: var(--u-accent);
  border-bottom-color: var(--u-accent);
}

.config-tab-pane[hidden] { display: none; }

/* Region "code" textareas (per-region editors) */
.config-region-code {
  width: 100%;
  min-height: 280px;
  resize: vertical;
  background: var(--u-bg);
  color: var(--u-text);
  border: 1px solid #2a2d32;
  border-radius: 3px;
  padding: 10px 12px;
  font-family: var(--u-mono);
  font-size: 12px;
  line-height: 1.5;
}
.config-region-code:focus { outline: none; border-color: var(--u-accent); }

/* Layout regions list */
.layout-region-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  background: var(--u-bg);
  border: 1px solid var(--u-border);
  border-radius: 3px;
  margin-bottom: 4px;
}
.layout-region-name {
  font-size: 13px;
  color: var(--u-text);
  font-family: var(--u-sans);
}
.layout-region-type {
  font-family: var(--u-mono);
  font-size: 10px;
  color: var(--u-text-dim);
  letter-spacing: 0.5px;
  margin-top: 2px;
}
.layout-region-type code {
  color: var(--u-accent);
}

/* ---------- sections ---------- */

.config-section {
  padding: 14px 18px 10px 18px;
  border-bottom: 1px solid var(--u-border);
}
.config-tab-pane > .config-section:last-child { border-bottom: none; }

.config-section-title {
  font-family: var(--u-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--u-text-dim);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.config-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  font-size: 13px;
  color: var(--u-text);
}
.config-row > span { color: var(--u-text-dim); }

.config-row input[type="text"],
.config-row textarea {
  width: 100%;
  background: var(--u-bg);
  border: 1px solid #2a2d32;
  border-radius: 3px;
  padding: 5px 8px;
  color: var(--u-text);
  font-family: var(--u-mono);
  font-size: 12px;
}
.config-row textarea {
  min-height: 80px;
  resize: vertical;
  line-height: 1.45;
}
.config-row input[type="text"]:focus,
.config-row textarea:focus {
  outline: none;
  border-color: var(--u-accent);
}

.config-logo-fields {
  display: flex;
  gap: 6px;
  align-items: center;
}
.config-logo-fields input[type="text"] { flex: 1; min-width: 0; }

.config-code-btn {
  padding: 5px 12px;
  font-size: 10px;
  letter-spacing: 1.5px;
}
.config-code-btn.is-active {
  border-color: var(--u-accent);
  color: var(--u-accent);
  background: var(--u-accent-soft);
}

.config-logo-code {
  margin-top: 8px;
  padding-left: 150px; /* align under the input, matching the 140px label column + 10px gap */
}
.config-logo-code[hidden] { display: none; }
.config-logo-code textarea {
  width: 100%;
  min-height: 100px;
  resize: vertical;
  background: var(--u-bg);
  border: 1px solid #2a2d32;
  border-radius: 3px;
  padding: 6px 8px;
  color: var(--u-text);
  font-family: var(--u-mono);
  font-size: 12px;
  line-height: 1.45;
}
.config-logo-code textarea:focus { outline: none; border-color: var(--u-accent); }

.config-code-row {
  margin-top: 4px;
}
.config-code-row .config-code-btn {
  justify-self: start;
}

.config-hint {
  margin-top: 8px;
  padding: 8px 10px;
  font-size: 11px;
  color: var(--u-text-dim);
  background: rgba(255,255,255,0.025);
  border: 1px solid var(--u-border);
  border-radius: 3px;
  line-height: 1.5;
}
.config-hint kbd {
  display: inline-block;
  font-family: var(--u-mono);
  font-size: 10px;
  padding: 1px 5px;
  background: var(--u-bg);
  border: 1px solid #2a2d32;
  border-bottom-width: 2px;
  border-radius: 2px;
  color: var(--u-text);
  margin: 0 2px;
}
.config-hint code {
  font-family: var(--u-mono);
  font-size: 11px;
  color: var(--u-accent);
}

@media (max-width: 540px) {
  .config-logo-code { padding-left: 0; }
}

.config-row.config-color input[type="color"] {
  width: 48px;
  height: 28px;
  background: var(--u-bg);
  border: 1px solid #2a2d32;
  border-radius: 3px;
  padding: 2px;
  cursor: pointer;
  justify-self: start;
}

.config-row.config-check {
  grid-template-columns: 22px 1fr;
}
.config-row.config-check input { cursor: pointer; }
.config-row.config-check > span { color: var(--u-text); }

.config-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-top: 1px solid var(--u-border);
  flex-wrap: wrap;
}
.config-actions-spacer { flex: 1; }
.config-action {
  font-family: var(--u-mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  background: transparent;
  color: var(--u-text-dim);
  border: 1px solid #2a2d32;
  border-radius: 3px;
  padding: 7px 14px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.config-action:hover {
  border-color: var(--u-accent);
  color: var(--u-text);
}
.config-action.config-action-primary {
  color: var(--u-accent);
  border-color: var(--u-border-accent);
}
.config-action.config-action-primary:hover {
  background: var(--u-accent-soft);
}

@media (max-width: 540px) {
  .config-row { grid-template-columns: 110px 1fr; }
  #configPanel { border-radius: 6px; }
}