/* ==========================================================================
   EROSION_CORROSION.HTML

   The same shape as rtm.html and facsimile.html: a settings panel on the
   left, a drag handle, and a work area of tabs. Colours are the tokens in
   kvot.css, so the page follows the theme toggle. Class prefix: ec-.
   ========================================================================== */

.ec {
  display: grid;
  grid-template-columns: var(--ec-side-width, 340px) 8px minmax(0, 1fr);
  height: 100%;
  overflow: hidden;
  font-family: verdana, sans-serif;
  font-size: 13px;
}

/* ---- the settings column ------------------------------------------------ */
.ec-side {
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  min-width: 0;
  height: 100%;
  overflow: hidden;
  border-right: 1px solid var(--border-color);
  background: var(--bg-surface);
}
.ec-side-scroll { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: 0 14px 10px; }
.ec-side-foot {
  flex: 0 0 auto;
  padding: 8px 14px 10px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.ec-resize {
  cursor: col-resize;
  display: flex;
  align-items: stretch;
  justify-content: center;
  background: transparent;
  position: relative;
  z-index: 1;
}
.ec-resize::after { content: ''; width: 3px; border-radius: 2px; transition: background 0.15s; }
.ec-resize:hover::after, .ec-resize.active::after { background: var(--color-kvot-accent); }

/* ---- a folding section -------------------------------------------------- */
.ec-sec { margin: 0 0 4px; }
.ec-sec > summary {
  margin: 10px 0 6px;
  padding: 0 0 4px 16px;
  border-bottom: 1px solid var(--border-color);
  font: 700 0.95rem RawengulkSans, sans-serif;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  position: relative;
}
.ec-sec > summary::-webkit-details-marker { display: none; }
.ec-sec > summary::before {
  content: '▸';
  position: absolute;
  left: 0;
  transition: transform 0.15s;
  color: var(--text-muted);
}
.ec-sec[open] > summary::before { transform: rotate(90deg); }
.ec-sec > summary .ec-count {
  float: right;
  font: 11px verdana, sans-serif;
  color: var(--text-muted);
}
.ec-about { margin: 0 0 8px; font-size: 11px; line-height: 1.5; color: var(--text-muted); }

/* ---- a labelled control ------------------------------------------------- */
.ec-row { display: block; margin: 0 0 8px; }
.ec-row[hidden] { display: none; }
.ec-row label { display: block; margin: 0 0 2px; color: var(--text-primary); }
.ec-row .ec-name, .ec-check .ec-name {
  display: block;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 11px;
  color: var(--text-muted);
}
.ec-row input, .ec-row select, .ec-row textarea {
  box-sizing: border-box;
  width: 100%;
  padding: 3px 5px;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  font-size: 12px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
}
.ec-row textarea { min-height: 80px; resize: vertical; }
.ec-row input.changed, .ec-row select.changed { border-color: var(--color-kvot-bright); }
.ec-row input:invalid { border-color: var(--color-kvot-accent); }
.ec-unit { color: var(--text-muted); font-size: 11px; margin-left: 4px; }
.ec-check { display: flex; gap: 6px; align-items: flex-start; margin: 0 0 6px; cursor: pointer; line-height: 1.35; }
.ec-check[hidden] { display: none; }
.ec-check input { margin-top: 2px; }
.ec-check.changed > span { text-decoration: underline; text-decoration-color: var(--color-kvot-bright); text-underline-offset: 3px; }
.ec-desc { display: block; font-size: 11px; color: var(--text-muted); line-height: 1.4; }
.ec-inline { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.ec-muted { color: var(--text-muted); font-size: 11px; line-height: 1.5; }
.ec-muted[hidden] { display: none; }
.ec-warn { color: var(--text-primary); font-size: 11px; line-height: 1.5; border-left: 3px solid var(--color-kvot-bright); padding-left: 6px; margin: 4px 0; }

/* ---- the hydro file list ------------------------------------------------ */
.ec-drop {
  border: 1px dashed var(--input-border);
  border-radius: 6px;
  padding: 8px;
  margin: 0 0 8px;
  text-align: center;
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.5;
  transition: border-color 0.15s, background 0.15s;
}
.ec-drop.over { border-color: var(--color-kvot-accent); background: var(--bg-secondary); color: var(--text-primary); }
.ec-files { list-style: none; margin: 0 0 8px; padding: 0; }
.ec-files li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 8px;
  align-items: center;
  padding: 5px 6px;
  margin: 0 0 4px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-primary);
  font-size: 11px;
}
.ec-files .ec-file-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ec-files .ec-file-meta { grid-column: 1 / -1; color: var(--text-muted); }
.ec-files .ec-file-warn { grid-column: 1 / -1; color: var(--text-primary); border-left: 3px solid var(--color-kvot-bright); padding-left: 6px; }
.ec-files button { padding: 0 6px; border: 0; background: none; color: var(--text-muted); font-size: 14px; cursor: pointer; line-height: 1; }
.ec-files button:hover { color: var(--color-kvot-accent); }
.ec-files:empty::after { content: 'No hydro data yet.'; display: block; color: var(--text-muted); font-size: 11px; padding: 2px 0 6px; }

/* ---- buttons ------------------------------------------------------------ */
.ec-actions { display: flex; gap: 6px; flex-wrap: wrap; margin: 0 0 6px; }
.ec-btn {
  padding: 5px 14px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: var(--color-kvot-accent);
  color: #fff;
  font: 600 12px verdana, sans-serif;
  cursor: pointer;
}
.ec-btn.secondary { background: var(--bg-primary); color: var(--text-primary); border-color: var(--border-color); }
.ec-btn.small { padding: 3px 8px; font-size: 11px; font-weight: 400; }
.ec-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.ec-btn:focus-visible { outline: 2px solid var(--color-kvot-bright); outline-offset: 1px; }

/* The status well under the buttons: fixed height, scrolls, so the buttons
   above it do not move when the message changes length. */
.ec-status {
  margin-top: 8px;
  padding: 8px 10px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-primary);
  font-size: 12px;
  line-height: 1.45;
  color: var(--text-secondary);
  height: 4.35em;
  overflow-y: auto;
  overscroll-behavior: contain;
  overflow-wrap: anywhere;
}
.ec-status.ok { border-color: var(--color-kvot-primary); }
.ec-status.error { border-color: var(--color-kvot-accent); color: var(--text-primary); }
.ec-status.warn { border-color: var(--color-kvot-bright); color: var(--text-primary); }

/* ---- the work area ------------------------------------------------------ */
.ec-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100%;
  overflow: hidden;
  margin-left: -8px;
  padding-left: 8px;
}
.ec-tabs {
  display: flex;
  gap: 2px;
  margin-left: -8px;
  padding: 6px 10px 0 18px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  flex: 0 0 auto;
  overflow-x: auto;
}
.ec-tabs button {
  padding: 6px 12px;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  background: transparent;
  color: var(--text-secondary);
  font: 12px verdana, sans-serif;
  cursor: pointer;
  white-space: nowrap;
}
.ec-tabs button:hover { color: var(--text-primary); }
.ec-tabs button.active {
  background: var(--bg-primary);
  color: var(--text-primary);
  border-color: var(--border-color);
  font-weight: 600;
  margin-bottom: -1px;
}
.ec-pane {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding: 10px 14px;
  background: var(--bg-primary);
}
.ec-pane[hidden] { display: none; }

.ec-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 0 0 8px;
  font-size: 12px;
}
.ec-toolbar label { display: flex; gap: 5px; align-items: center; }
.ec-toolbar label[hidden] { display: none; }
.ec-toolbar input[type="text"], .ec-toolbar select {
  padding: 2px 5px;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  font-size: 12px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
}
.ec-toolbar .ec-spacer { flex: 1 1 auto; }

/* ---- charts and the empty state ----------------------------------------- */
.plot { width: 100%; height: 460px; }
.plot[hidden] { display: none; }
.ec-empty { margin: 0; padding: 24px 12px 40px; color: var(--text-muted); font-size: 12px; }
.ec-empty[hidden] { display: none; }

/* ---- tables ------------------------------------------------------------- */
.ec-table-wrap { overflow: auto; max-width: 100%; }
.ec-table {
  border-collapse: collapse;
  font-size: 12px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  white-space: nowrap;
}
.ec-table th, .ec-table td {
  padding: 3px 10px 3px 6px;
  text-align: right;
  border-bottom: 1px solid var(--table-border);
}
.ec-table th {
  position: sticky;
  top: 0;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 600;
  text-align: right;
  cursor: pointer;
  user-select: none;
  z-index: 1;
}
.ec-table th.sorted::after { content: ' ▾'; color: var(--color-kvot-accent); }
.ec-table th.sorted.asc::after { content: ' ▴'; }
.ec-table th:first-child, .ec-table td:first-child { text-align: left; }
.ec-table td.text, .ec-table th.text { text-align: left; }
.ec-table tbody tr:nth-child(even) { background: var(--table-stripe); }
.ec-table tbody tr:hover { background: var(--bg-surface); }
.ec-table td.flag { color: var(--color-kvot-accent); }
.ec-table td.dim { color: var(--text-muted); }

/* The key-output table on the summary tab. */
.ec-key { border-collapse: collapse; font-size: 12px; margin: 0 0 14px; }
.ec-key th, .ec-key td { padding: 4px 14px 4px 0; border-bottom: 1px solid var(--table-border); vertical-align: top; }
.ec-key th { text-align: left; font-weight: 600; color: var(--text-primary); }
.ec-key td { text-align: right; font-family: ui-monospace, Menlo, Consolas, monospace; white-space: nowrap; }
.ec-key td.text { text-align: left; font-family: verdana, sans-serif; }
.ec-key thead th { text-align: right; color: var(--text-secondary); font-weight: 400; font-size: 11px; }
.ec-key thead th:first-child { text-align: left; }
.ec-key tr.total td, .ec-key tr.total th { font-weight: 700; }
.ec-key .ec-desc { font-weight: 400; max-width: 34em; white-space: normal; }
.ec-summary h3 { margin: 14px 0 6px; font: 700 1rem RawengulkSans, sans-serif; color: var(--text-primary); }
.ec-summary h3:first-child { margin-top: 2px; }
.ec-summary .ec-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; margin: 0 0 14px; }
.ec-card {
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-surface);
}
.ec-card .ec-card-value { font: 700 1.35rem ui-monospace, Menlo, Consolas, monospace; color: var(--text-primary); }
.ec-card .ec-card-label { font-size: 11px; color: var(--text-secondary); line-height: 1.4; margin-top: 2px; }
.ec-settings-list { font-size: 12px; line-height: 1.6; columns: 2; column-gap: 28px; margin: 0; padding: 0; list-style: none; }
.ec-settings-list li { break-inside: avoid; }
.ec-settings-list code { font-size: 11px; color: var(--text-secondary); }
@media (max-width: 900px) { .ec-settings-list { columns: 1; } }

/* ---- help --------------------------------------------------------------- */
.ec-help { max-width: 64rem; line-height: 1.65; }
.ec-help h2 { margin: 4px 0 10px; font: 700 1.3rem RawengulkSans, sans-serif; color: var(--text-primary); }
.ec-help h3 { margin: 22px 0 6px; font: 700 1.05rem RawengulkSans, sans-serif; color: var(--text-primary); }
.ec-help h4 { margin: 16px 0 4px; font: 700 0.95rem verdana, sans-serif; color: var(--color-kvot-accent); }
.ec-help p { margin: 0 0 10px; }
.ec-help pre {
  margin: 0 0 12px;
  padding: 9px 12px;
  border-radius: 6px;
  background: var(--code-bg);
  color: var(--code-text);
  font-size: 12px;
  line-height: 1.55;
  overflow-x: auto;
}
.ec-help code { padding: 1px 4px; border-radius: 3px; background: var(--code-bg); font-size: 0.92em; }
.ec-help pre code { padding: 0; background: none; }
.ec-help .ec-eq {
  margin: 4px 0 12px 1.5em;
  font-family: 'Times New Roman', Times, serif;
  font-size: 1.05em;
  line-height: 1.8;
}
.ec-help .ec-eq i { font-style: italic; }
.ec-help table.ec-ref { border-collapse: collapse; margin: 4px 0 14px; font-size: 12px; }
.ec-help table.ec-ref td, .ec-help table.ec-ref th {
  padding: 4px 16px 4px 0;
  vertical-align: top;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle, rgba(128, 128, 128, 0.25));
}
.ec-help table.ec-ref th { font-weight: 600; }
.ec-help table.ec-ref code { white-space: nowrap; }

/* ---- narrow screens ----------------------------------------------------- */
@media (max-width: 760px) {
  .ec { grid-template-columns: 1fr; grid-template-rows: auto 1fr; overflow: auto; }
  .ec-side { height: auto; max-height: 50vh; border-right: 0; border-bottom: 1px solid var(--border-color); }
  .ec-resize { display: none; }
  .ec-main { margin-left: 0; padding-left: 0; }
  .ec-tabs { margin-left: 0; padding-left: 10px; }
  .plot { height: 360px; }
}