/* Sukumo monitor UI - minimalist web art / typewriter aesthetic.
 *
 * Design notes:
 *   - Monospace everything. Reads like a printout.
 *   - Off-white paper background (#f4f1ea), near-black ink (#111).
 *   - Single accent color (indigo, of course) used very sparingly.
 *   - Borders are thin lines, no shadows, no rounded corners.
 *   - ASCII-style dividers and prefixes (// section, > prompt).
 */

:root {
  --paper: #eef1f4;
  --paper-tint: #e2e7ec;
  --ink: #111111;
  --ink-soft: #4d5560;
  --ink-faint: #8c95a0;
  --rule: #1c1c1c;
  --indigo: #1c2638;
  --mono: "Inconsolata", "Courier New", "Courier", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 4rem; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* ----- header / nav ----- */

header {
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: 0.6rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 0 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
  text-transform: uppercase;
}

.brand::before { content: "▮ "; color: var(--indigo); }

nav a {
  color: var(--ink);
  text-decoration: none;
  margin-left: 1.2rem;
  font-size: 0.85rem;
  text-transform: lowercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}

nav a:hover { border-bottom-color: var(--ink); }

/* ----- main ----- */

main {
  max-width: 820px;
  margin: 1.5rem auto;
  padding: 0 1rem;
}

h1 {
  margin: 0.5rem 0 1.2rem;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: lowercase;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.5rem;
}

h1::before { content: "// "; color: var(--ink-faint); }

h2 {
  margin: 1.2rem 0 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  text-transform: lowercase;
  letter-spacing: 0.08em;
  color: var(--ink);
}

p { margin: 0.4rem 0; }

a { color: var(--indigo); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--ink); }

.muted { color: var(--ink-soft); }

strong { font-weight: 700; }

/* ----- big number (temperature) ----- */

.big-number {
  font-size: 2.2rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  margin: 0.3rem 0;
}

/* ----- dashboard image ----- */

.dashboard-image {
  margin: 1rem 0;
  text-align: center;
  border: 1px solid var(--rule);
  background: white;
  padding: 0.6rem;
}

.dashboard-image img {
  max-width: 100%;
  display: block;
  margin: 0 auto;
  image-rendering: pixelated;
}

/* ----- readings key (top of home page) ----- */

.readings-key {
  border: 1px solid var(--rule);
  padding: 0.8rem 1rem;
  margin: 1rem 0;
  background: var(--paper);
}

.readings-key h2 { margin-top: 0; }

.readings-key dl {
  margin: 0.4rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 1rem;
  row-gap: 0.5rem;
  /* Match body / explainer text size for consistent readability across pages. */
  font-size: 1rem;
}

.readings-key dt {
  font-weight: 700;
  text-transform: lowercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.readings-key dt::before { content: "› "; color: var(--ink-faint); }

.readings-key dd {
  margin: 0;
  color: var(--ink-soft);
}

/* Compact variant used on the data page where the key is reference-only.
 * Slightly tighter, but still uses the body font size for readability.
 * Preserves the original case of dt labels (T, sN, pH, ORP, DO) so they
 * match the column headers in the table below exactly. */
.readings-key.compact { padding: 0.6rem 0.9rem; }
.readings-key.compact dl { font-size: 0.95rem; row-gap: 0.3rem; }
.readings-key.compact dt { text-transform: none; letter-spacing: 0; }

@media (max-width: 540px) {
  .readings-key dl {
    grid-template-columns: 1fr;
    row-gap: 0.6rem;
  }
  .readings-key dd { padding-left: 0.8rem; }
}

/* ----- step-by-step tutorial (code page) ----- */

ol.tutorial {
  padding-left: 1.6rem;
  margin: 0.6rem 0 1.2rem;
}

ol.tutorial > li {
  margin: 0.7rem 0 1.2rem;
  padding-left: 0.3rem;
}

ol.tutorial > li > strong {
  display: inline-block;
  margin-bottom: 0.2rem;
}

ol.tutorial p,
ol.tutorial ul,
ol.tutorial dl {
  margin: 0.3rem 0;
}

ol.tutorial code {
  white-space: nowrap;
}

/* ----- generic 2-column dl on the code page ----- */

dl.protocol {
  margin: 0.5rem 0;
  padding: 0;
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 1rem;
  row-gap: 0.4rem;
}

dl.protocol dt {
  font-weight: 700;
  white-space: nowrap;
}

dl.protocol dd { margin: 0; color: var(--ink-soft); }

@media (max-width: 540px) {
  dl.protocol { grid-template-columns: 1fr; row-gap: 0.5rem; }
}

/* ----- explainer block ----- */

.explainer {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--indigo);
  padding: 0.8rem 1rem;
  margin: 1rem 0;
  background: var(--paper-tint);
}

.explainer h2 { margin-top: 0; }
.explainer ol { padding-left: 1.4rem; margin: 0.4rem 0; }
.explainer li { margin: 0.3rem 0; }

/* ----- grid of cards ----- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0;
  margin: 1rem 0;
  border: 1px solid var(--rule);
}

.card {
  padding: 0.8rem 1rem;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}

.card:last-child { border-right: none; }

.card h2 {
  margin-top: 0;
  border-bottom: 1px dashed var(--ink-faint);
  padding-bottom: 0.3rem;
}

.card h2::before { content: "> "; color: var(--ink-faint); }

/* prerequisite callout inside a card (e.g. consent before first entry) */
.prereq {
  background: var(--paper-tint);
  border-left: 3px solid var(--indigo);
  padding: 0.4rem 0.6rem;
  margin-top: 0.6rem;
  font-size: 0.9rem;
}

.prereq strong { color: var(--indigo); }

/* ----- tables ----- */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 1rem;
  font-family: var(--mono);
}

table th, table td {
  text-align: left;
  padding: 0.25rem 0.5rem;
  border-bottom: 1px dashed var(--ink-faint);
}

table th {
  font-weight: 700;
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--rule);
  margin: 0.5rem 0;
}

table.recent {
  font-size: 0.9rem;
  border-collapse: collapse;
  white-space: nowrap;
  min-width: 100%;
}

table.recent th,
table.recent td {
  padding: 0.18rem 0.45rem;
  border-bottom: 1px dashed var(--ink-faint);
  text-align: right;
  /* Preserve the case of column labels (T, sN, ORP, etc.).
   * !important defeats the global `table th { text-transform: lowercase }` rule
   * regardless of cascade ordering or browser cache quirks. */
  text-transform: none !important;
  letter-spacing: 0 !important;
}

table.recent th:first-child,
table.recent td:first-child {
  text-align: left;
  position: sticky;
  left: 0;
  background: var(--paper);
}

table.recent th {
  background: var(--paper-tint);
  border-bottom: 1px solid var(--rule);
}

table.recent th:first-child { background: var(--paper-tint); }

.column-key {
  font-size: 0.72rem;
  margin: 0.3rem 0 0.6rem;
  line-height: 1.4;
}

.column-key span { white-space: nowrap; }

/* ----- forms ----- */

form label {
  display: block;
  margin: 0.7rem 0;
  font-size: 1rem;
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

form label::before { content: "> "; color: var(--ink-faint); }

form input,
form textarea,
form select {
  display: block;
  width: 100%;
  padding: 0.4rem 0.5rem;
  margin-top: 0.2rem;
  border: 1px solid var(--rule);
  border-radius: 0;
  font-family: var(--mono);
  font-size: 1rem;
  background: white;
  color: var(--ink);
}

form input:focus,
form textarea:focus,
form select:focus {
  outline: 2px solid var(--indigo);
  outline-offset: -2px;
}

fieldset {
  border: 1px solid var(--rule);
  padding: 0.7rem 1rem;
  margin: 0.8rem 0;
  border-radius: 0;
}

fieldset legend {
  padding: 0 0.4rem;
  font-size: 0.95rem;
  text-transform: lowercase;
  letter-spacing: 0.05em;
}

button {
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 0;
  padding: 0.45rem 1rem;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 1rem;
  text-transform: lowercase;
  letter-spacing: 0.08em;
}

button:hover { background: var(--indigo); border-color: var(--indigo); }
button:disabled { opacity: 0.5; cursor: wait; }

button.secondary {
  background: var(--paper);
  color: var(--ink);
}

button.secondary:hover { background: var(--ink); color: var(--paper); }

/* ----- diary entries ----- */

ul.entries {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0;
}

.entry {
  border: 1px solid var(--rule);
  padding: 0.6rem 0.9rem;
  margin: 0.5rem 0;
  background: var(--paper);
}

.entry-header {
  display: flex;
  gap: 0.6rem;
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
  flex-wrap: wrap;
  align-items: center;
}

.tag {
  background: var(--ink);
  color: var(--paper);
  padding: 0.05rem 0.5rem;
  border-radius: 0;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: lowercase;
}

.readings {
  font-family: var(--mono);
  color: var(--ink-soft);
  font-size: 1rem;
  margin: 0.2rem 0;
}

.entry p { margin: 0.3rem 0; font-size: 1rem; }
.media { font-size: 0.85rem; padding-left: 1.2rem; }

/* ----- QR code ----- */

.qr {
  width: 160px;
  height: 160px;
  border: 1px solid var(--rule);
  background: white;
  padding: 4px;
  image-rendering: pixelated;
}

/* ----- code listing ----- */

ul.files {
  list-style: none;
  padding: 0;
  font-family: var(--mono);
  font-size: 1rem;
}

ul.files li::before { content: "  · "; color: var(--ink-faint); }
ul.files li { padding: 0.1rem 0; }

/* ----- date-grouped downloads (data page) ----- */

.downloads-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin: 0.4rem 0 0.8rem;
}

.date-jump {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.date-jump label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.95rem;
}

.date-jump label::before { content: none; }

.date-jump input[type="date"] {
  font-family: var(--mono);
  font-size: 0.95rem;
  padding: 0.2rem 0.4rem;
  border: 1px solid var(--rule);
  background: white;
  width: auto;
}

.bulk-link {
  background: var(--ink);
  color: var(--paper);
  padding: 0.3rem 0.7rem;
  text-decoration: none;
  letter-spacing: 0.04em;
}

.bulk-link:hover { background: var(--indigo); color: var(--paper); }

ul.day-groups { list-style: none; padding: 0; margin: 0; }
ul.day-groups > li {
  margin: 0.6rem 0;
  border-top: 1px dashed var(--ink-faint);
  padding-top: 0.4rem;
}
ul.day-groups > li:first-child { border-top: none; padding-top: 0; }

.day-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.day-date::before { content: "› "; color: var(--ink-faint); font-weight: 400; }

pre.code {
  background: var(--ink);
  color: var(--paper);
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.95rem;
  font-family: var(--mono);
  line-height: 1.5;
  border: 1px solid var(--rule);
  white-space: pre;
}

pre {
  background: var(--paper-tint);
  padding: 0.6rem 0.8rem;
  border-left: 2px solid var(--indigo);
  font-size: 0.95rem;
  overflow-x: auto;
}

code {
  background: var(--paper-tint);
  padding: 0.05rem 0.3rem;
  font-family: var(--mono);
  font-size: 1rem;
}

/* ----- details / disclosure ----- */

details {
  border: 1px dashed var(--ink-faint);
  padding: 0.5rem 0.8rem;
  margin: 0.6rem 0;
}

details summary {
  cursor: pointer;
  font-size: 1rem;
  text-transform: lowercase;
  letter-spacing: 0.04em;
}

/* ----- footer ----- */

footer {
  max-width: 820px;
  margin: 3rem auto 1rem;
  padding: 0.8rem 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--ink-soft);
  text-align: center;
}

footer p::before { content: "// "; }
footer p::after { content: " //"; }

/* ----- mobile tweaks ----- */

@media (max-width: 540px) {
  body { font-size: 13px; }
  .header-inner { gap: 0.3rem; }
  nav a { margin-left: 0.7rem; }
  .grid { grid-template-columns: 1fr; }
  .card { border-right: none; }
}