/* =========================================================
   NIGHTFALL BIN ANALYSER
   Nightfall Automotive — Nord Dark Theme
   ========================================================= */

/* ---------- Tokens & base ---------- */

:root {
  color-scheme: dark;
  --bg: #242933;
  --bg-deep: #20242d;
  --panel: #2e3440;
  --panel-light: #353d4c;
  --border: #434c5e;
  --text: #eceff4;
  --muted: #aab4c5;
  --dim: #7d899d;
  --cyan: #88c0d0;
  --blue: #81a1c1;
  --purple: #b48ead;
  --green: #a3be8c;
  --red: #bf616a;
  --radius: 12px;
  --font: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.7);
}

* {
  box-sizing: border-box;
}

/* Layout rules like display: grid must never un-hide an element */
[hidden] {
  display: none !important;
}

html {
  min-height: 100%;
  background: var(--bg-deep);
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(136, 192, 208, 0.10), transparent 50%),
    radial-gradient(ellipse at 100% 100%, rgba(163, 190, 140, 0.05), transparent 45%),
    var(--bg-deep);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
}

button,
input,
select,
a {
  font: inherit;
}

a {
  color: var(--cyan);
  text-decoration: none;
}

a:hover {
  color: var(--text);
}

/* Hex-digit rain behind everything; kept faint so the page stays readable */
.matrix-rain {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  opacity: 0.22;
  pointer-events: none;
  /* Fade the rain out towards the bottom of the screen */
  -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 55%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, #000 55%, transparent 100%);
}

.page {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  width: min(1100px, calc(100% - 32px));
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  padding: 24px 0 18px;
}

main {
  flex: 1;
}

/* ---------- Page header ---------- */

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 0 24px;
  margin-bottom: 28px;
  border-bottom: 1px solid rgba(136, 192, 208, 0.16);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
}

.brand:hover {
  color: var(--text);
}

.brand-logo {
  display: block;
  width: auto;
  height: 36px;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  letter-spacing: 0.15em;
}

.brand-copy strong {
  font-size: 15px;
  font-weight: 900;
}

.brand-copy > span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.3em;
}

.header-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  transition: border-color 120ms ease, color 120ms ease;
}

.back-link:hover {
  border-color: var(--cyan);
  color: var(--text);
}

.back-link span {
  transition: transform 120ms ease;
}

.back-link:hover span {
  transform: translateX(-3px);
}

.page-tag {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.18em;
}

.page-tag strong {
  margin-left: 8px;
  color: var(--purple);
  font-size: 20px;
}

/* ---------- Panels ---------- */

/* Slightly see-through with a blur, so the rain shows faintly behind */
.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(53, 61, 76, 0.9), rgba(46, 52, 64, 0.88) 120px);
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.panel + .panel,
.summary + .panel {
  margin-top: 20px;
}

.panel-header {
  padding: 30px 34px;
  border-bottom: 1px solid var(--border);
}

.panel-body {
  padding: 30px 34px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--cyan);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.2em;
}

h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.045em;
}

h1 .accent {
  color: var(--green);
}

.intro {
  max-width: 650px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- Upload ---------- */

.upload-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.upload-box {
  position: relative;
  display: block;
  padding: 22px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  background: var(--bg);
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease;
}

.upload-box:hover,
.upload-box:focus-within {
  border-color: var(--cyan);
  background: rgba(136, 192, 208, 0.05);
}

.upload-box.has-file {
  border-style: solid;
  border-color: rgba(163, 190, 140, 0.55);
}

.upload-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.2em;
}

.upload-label em {
  color: var(--dim);
  font-style: normal;
  font-weight: 600;
}

.upload-label .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.upload-label .dot.ori {
  background: var(--blue);
}

.upload-label .dot.stage {
  background: var(--green);
}

/* The browser's own filename is hidden; .file-name below shows it instead */
input[type="file"] {
  width: 100%;
  color: transparent;
  font-size: 13px;
}

input[type="file"]::file-selector-button {
  margin-right: 12px;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
}

input[type="file"]:hover::file-selector-button {
  border-color: var(--cyan);
}

input[type="file"]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.file-name {
  margin-top: 10px;
  color: var(--dim);
  font-size: 12px;
  word-break: break-all;
}

.upload-box.has-file .file-name {
  color: var(--green);
}

.save-notice {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 18px;
  padding: 14px 16px;
  border: 1px solid rgba(136, 192, 208, 0.25);
  border-radius: 8px;
  background: rgba(136, 192, 208, 0.06);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
  cursor: pointer;
}

.save-notice strong {
  color: var(--text);
}

.save-notice input {
  flex: none;
  width: 16px;
  height: 16px;
  margin: 2px 0 0;
  accent-color: var(--cyan);
  cursor: pointer;
}

.actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 22px;
}

.primary-button {
  padding: 12px 24px;
  border: 0;
  border-radius: 8px;
  background: linear-gradient(180deg, #b4cf9c, var(--green));
  box-shadow: 0 8px 20px -8px rgba(163, 190, 140, 0.6);
  color: var(--bg-deep);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.primary-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px -8px rgba(163, 190, 140, 0.7);
}

.primary-button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.primary-button:disabled {
  opacity: 0.55;
  transform: none;
  cursor: progress;
}

.status {
  color: var(--muted);
  font-size: 13px;
}

.error {
  display: none;
  margin-top: 16px;
  padding: 14px 16px;
  border: 1px solid rgba(191, 97, 106, 0.45);
  border-radius: 8px;
  background: rgba(191, 97, 106, 0.1);
  color: #d08770;
  font-size: 14px;
}

/* ---------- Results ---------- */

#results {
  display: none;
  margin-top: 28px;
}

.summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.stat {
  position: relative;
  overflow: hidden;
  padding: 18px 18px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(46, 52, 64, 0.88);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow);
}

.stat::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: var(--accent, var(--cyan));
  opacity: 0.85;
}

.stat:nth-child(1) { --accent: var(--cyan); }
.stat:nth-child(2) { --accent: var(--purple); }
.stat:nth-child(3) { --accent: var(--blue); }
.stat:nth-child(4) { --accent: var(--green); }

.stat-label {
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.stat-value {
  margin-top: 8px;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.stat-value.verified {
  color: var(--green);
}

.chart-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.chart-title {
  margin: 0;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.chart-note {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.legend-line {
  width: 26px;
  height: 3px;
  border-radius: 99px;
}

.ori-line {
  background: var(--blue);
}

.stage-line {
  background: var(--green);
}

.map-selector-wrap {
  margin: 22px 0 18px;
}

.map-selector-wrap label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.2em;
}

#map-selector {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

#map-selector:focus {
  outline: 2px solid var(--cyan);
  outline-offset: 1px;
}

.selector-note {
  margin-top: 8px;
  color: var(--dim);
  font-size: 12px;
}

.chart-wrap {
  width: 100%;
  overflow-x: auto;
  padding: 10px 0 4px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
}

/* The torque chart only; other SVGs (like the star border) size themselves */
#chart {
  display: block;
  width: 100%;
  min-width: 720px;
  height: auto;
}

.axis {
  stroke: var(--border);
  stroke-width: 1;
}

.grid-line {
  stroke: var(--border);
  stroke-width: 1;
  stroke-dasharray: 3 5;
  opacity: 0.6;
}

.axis-text {
  fill: var(--dim);
  font-size: 11px;
}

.axis-title {
  fill: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.stage-area-top {
  stop-color: var(--green);
  stop-opacity: 0.22;
}

.stage-area-bottom {
  stop-color: var(--green);
  stop-opacity: 0;
}

.ori-path,
.stage-path {
  fill: none;
  stroke-width: 3.5;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.ori-path {
  stroke: var(--blue);
}

.stage-path {
  stroke: var(--green);
  filter: drop-shadow(0 4px 10px rgba(163, 190, 140, 0.35));
}

.point {
  stroke: var(--bg);
  stroke-width: 2;
}

.ori-point {
  fill: var(--blue);
}

.stage-point {
  fill: var(--green);
}

.review-title {
  fill: var(--text);
  font-size: 28px;
  font-weight: 800;
}

.review-text {
  fill: var(--muted);
  font-size: 16px;
}

.table-wrap {
  margin-top: 22px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: right;
}

th:first-child,
td:first-child {
  text-align: left;
}

th {
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

tbody tr:hover {
  background: rgba(136, 192, 208, 0.05);
}

td.gain-up {
  color: var(--green);
  font-weight: 700;
}

td.gain-down {
  color: var(--red);
  font-weight: 700;
}

/* ---------- What's been done ---------- */

.changes-panel {
  margin-bottom: 20px;
}

.changes-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.changes-list li {
  position: relative;
  padding: 12px 14px 12px 38px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  font-size: 14px;
}

.changes-list li::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 15px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent, var(--cyan));
  box-shadow: 0 0 10px var(--accent, var(--cyan));
  transform: translateY(-50%);
}

.changes-list li.is-fault { --accent: var(--red); }
.changes-list li.is-speed { --accent: var(--purple); }
.changes-list li.is-torque { --accent: var(--green); }
.changes-list li.is-switch { --accent: var(--blue); }
.changes-list li.is-muted { --accent: var(--dim); color: var(--muted); }

.sub-title {
  margin: 24px 0 10px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.2em;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 5px 10px;
  border: 1px solid rgba(191, 97, 106, 0.45);
  border-radius: 6px;
  background: rgba(191, 97, 106, 0.1);
  color: var(--text);
  font: 600 13px ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

.chip small {
  margin-left: 6px;
  color: var(--muted);
  font-size: 11px;
}

.switch-details {
  margin-top: 20px;
  color: var(--muted);
  font-size: 13px;
}

.switch-details summary {
  color: var(--text);
  cursor: pointer;
}

.switch-list {
  columns: 3 180px;
  margin: 10px 0 0;
  padding-left: 18px;
  font: 12px ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

/* ---------- Beta box ---------- */

.beta-box {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 320px);
  align-items: center;
  gap: 24px;
  margin-top: 28px;
  padding: 24px 28px;
  border: 1px dashed rgba(180, 142, 173, 0.55);
  border-radius: var(--radius);
  background: rgba(46, 52, 64, 0.88);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.beta-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--purple);
  color: var(--bg-deep);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.25em;
}

.beta-box h2 {
  margin: 12px 0 6px;
  font-size: 18px;
  font-weight: 900;
}

.beta-box p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

/* Plain button; star-border.js adds the travelling star */
.beta-button {
  justify-self: end;
  display: inline-grid;
  place-items: center;
  min-width: 200px;
  padding: 14px 26px;
  border-radius: 12px;
  background: rgba(32, 36, 45, 0.85);
  color: var(--text);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: background 160ms ease, transform 160ms ease;
}

.beta-button:hover {
  background: rgba(236, 239, 244, 0.06);
  color: #ffffff;
  transform: translateY(-1px);
}

.beta-button:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 5px;
}

/* ---------- Star border ---------- */

.star-border {
  position: relative;
  isolation: isolate;
  border-radius: var(--sb-radius);
}

/* A faint resting outline for the star to travel along */
.star-border--dark {
  box-shadow: inset 0 0 0 var(--sb-thickness) rgba(236, 239, 244, 0.14);
}

.star-border > :not(.sb-layer) {
  position: relative;
  z-index: 1;
}

.sb-layer {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  filter: drop-shadow(0 0 var(--sb-glow) var(--sb-color));
}

.sb-star {
  filter: drop-shadow(0 0 3px var(--sb-color));
}

/* clickPulse: a ring that spreads out from the border */
.star-border.is-pulsing {
  animation: sb-pulse 600ms ease-out;
}

@keyframes sb-pulse {
  from {
    box-shadow:
      inset 0 0 0 var(--sb-thickness) rgba(236, 239, 244, 0.14),
      0 0 0 0 color-mix(in srgb, var(--sb-color) 45%, transparent);
  }
  to {
    box-shadow:
      inset 0 0 0 var(--sb-thickness) rgba(236, 239, 244, 0.14),
      0 0 0 14px color-mix(in srgb, var(--sb-color) 0%, transparent);
  }
}

/* ---------- Footer ---------- */

.page-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  padding: 28px 2px 0;
  color: var(--dim);
  font-size: 10px;
  letter-spacing: 0.12em;
}

/* ---------- Responsive ---------- */

@media (max-width: 800px) {
  .summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .page-tag {
    display: none;
  }

  .back-link {
    padding: 7px 11px;
    font-size: 10px;
  }

  .back-link .back-text {
    display: none;
  }

  .back-link span[aria-hidden] {
    font-size: 16px;
    line-height: 1;
  }

  .panel-header,
  .panel-body {
    padding: 22px 20px;
  }

  .upload-grid,
  .summary,
  .beta-box {
    grid-template-columns: 1fr;
  }

  .beta-box {
    padding: 20px;
  }

  .page-footer {
    flex-direction: column;
    text-align: center;
  }
}