:root {
  color-scheme: light dark;
  --color-background: #f6f7f9;
  --color-surface: #ffffff;
  --color-surface-sunken: #eceef2;
  --color-text: #1b1f24;
  --color-muted: #5b6573;
  --color-border: #dce0e6;
  --color-track: #1b1f24;
  --color-accent: #7a45c4;
  --color-accent-start: #b5368f;
  --color-accent-end: #5b4bdb;
  --color-accent-contrast: #ffffff;
  --gradient-accent: linear-gradient(135deg, var(--color-accent-start), var(--color-accent-end));
  --color-success: #1a7f4b;
  --color-warning: #b4540a;
  --color-danger: #c62828;
  --color-hover: rgb(0 0 0 / 0.06);
  --radius: 8px;
  --header-height: 56px;
}

/* Dark theme: true black backgrounds, so pixels switch off on OLED screens */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #000000;
    --color-surface: #0c0c0e;
    --color-surface-sunken: #000000;
    --color-text: #ececec;
    --color-muted: #8f98a5;
    --color-border: #25262a;
    --color-track: #ffffff;
    --color-accent: #b48cff;
    --color-accent-start: #c0409f;
    --color-accent-end: #6a55f0;
    --color-accent-contrast: #ffffff;
    --color-success: #4cc38a;
    --color-warning: #f0a35e;
    --color-danger: #ff7b72;
    --color-hover: rgb(255 255 255 / 0.08);
  }
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  font: 16px/1.5 system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}

h1, h2, h3, p { margin: 0; }
h1 {
  font-size: 1.5rem;
  line-height: 1.25;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
dialog h2 { font-size: 1.1rem; line-height: 1.25; margin-bottom: 14px; }

:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
dialog:focus { outline: none; }

/* Touch screens: no grey flash over the tapped area, and no double-tap delay */
button, .slider { -webkit-tap-highlight-color: transparent; }
button { touch-action: manipulation; }

/* Icons: standalone SVG files in assets/icons.
   Single-color icons are drawn as CSS masks, so they follow the text color.
   Icons with their own colors (gradient or red artwork) are used as they are. */
.icon {
  display: inline-block;
  flex: none;
  width: 1em;
  height: 1em;
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
}
.icon[data-icon="edit"],
.icon[data-icon="close"],
.icon[data-icon="chevron-down"] {
  background-color: currentColor;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.icon[data-icon="edit"] { -webkit-mask-image: url("assets/icons/edit.svg"); mask-image: url("assets/icons/edit.svg"); }
.icon[data-icon="close"] { -webkit-mask-image: url("assets/icons/close.svg"); mask-image: url("assets/icons/close.svg"); }
.icon[data-icon="chevron-down"] { -webkit-mask-image: url("assets/icons/chevron-down.svg"); mask-image: url("assets/icons/chevron-down.svg"); }
.icon[data-icon="add"] { background-image: url("assets/icons/add.svg"); }
.icon[data-icon="delete"] { background-image: url("assets/icons/delete.svg"); }
.icon[data-icon="heart"] { background-image: url("assets/icons/heart.svg"); }
.icon[data-icon="heart-filled"] { background-image: url("assets/icons/heart-filled.svg"); }
.icon[data-icon="import"] { background-image: url("assets/icons/import.svg"); }
.icon[data-icon="projection"] { background-image: url("assets/icons/projection.svg"); }
.icon[data-icon="indicator"] { background-image: url("assets/icons/indicator.svg"); }

.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-text);
  font-size: 16px;
  cursor: pointer;
}
.icon-button:hover:not(:disabled) { background: var(--color-hover); }
.icon-button:disabled { opacity: 0.4; cursor: not-allowed; }
.icon-button-large { width: 40px; height: 40px; font-size: 22px; }
.icon-button-small { width: 32px; height: 32px; font-size: 16px; }
.rail-top { margin-bottom: auto; }
.icon-button-field { width: 40px; height: auto; align-self: stretch; border-color: var(--color-border); }

/* Layout */
.shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 60px;
  min-height: 100vh;
  /* The side bar's surface and divider, painted down the whole page so the bar never looks cut off */
  background:
    linear-gradient(var(--color-border), var(--color-border)) calc(100% - 59px) 0 / 1px 100% no-repeat,
    linear-gradient(var(--color-surface), var(--color-surface)) 100% 0 / 60px 100% no-repeat;
}

.rail {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100svh; /* svh stays fixed while the phone's address bar slides in and out, so the bar no longer stretches */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 0 0 8px;
}

/* Target slider: a vertical version of the progress bar, from 50% at the bottom to 100% at the top */
.target-slider { display: grid; justify-items: center; gap: 10px; width: 100%; }
.slider-value-box {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: var(--header-height);
  border-bottom: 1px solid transparent; /* keeps the text level with the title bar */
}
.slider-value-box::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 50%;
  width: 28px;
  height: 1px;
  transform: translateX(-50%);
  background: var(--color-border);
}
.slider-value { font-size: 0.9rem; line-height: 1.5; font-weight: 700; font-variant-numeric: tabular-nums; }
.slider {
  --position: 0;
  --rail-free: calc(100vh - 200px); /* sidebar height left after the four buttons */
  position: relative;
  width: 36px;
  height: max(120px, calc(var(--rail-free) * 0.65));
  cursor: pointer;
  touch-action: none;
  user-select: none;
}
@supports (height: 100svh) { .slider { --rail-free: calc(100svh - 200px); } }
.slider.is-disabled { opacity: 0.4; pointer-events: none; }
.slider-rail { position: absolute; inset: 9px 0; }
.slider-line {
  position: absolute;
  inset: 0 auto 0 calc(50% - 1px);
  width: 2px;
  border-radius: 1px;
  background: var(--color-track);
}
.slider-fill {
  position: absolute;
  bottom: 0;
  left: calc(50% - 2px);
  width: 4px;
  height: calc(var(--position) * 1%);
  border-radius: 2px;
  background: linear-gradient(to top, var(--color-accent-start), var(--color-accent-end));
  transition: height 0.2s ease;
}
.slider-mark {
  position: absolute;
  left: calc(50% - 6px);
  bottom: calc(var(--position) * 1%);
  width: 12px;
  height: 2px;
  transform: translateY(50%);
  border-radius: 1px;
  background: var(--color-track);
  opacity: 0.55;
}
.slider-thumb {
  position: absolute;
  left: 50%;
  bottom: calc(var(--position) * 1%);
  width: 18px;
  height: 18px;
  transform: translate(-50%, 50%);
  border: 3px solid transparent;
  border-radius: 50%;
  background: linear-gradient(var(--color-surface), var(--color-surface)) padding-box, var(--gradient-accent) border-box;
  transition: bottom 0.2s ease;
}
.slider-thumb::after { content: ""; position: absolute; inset: 2px; border-radius: 50%; background: var(--gradient-accent); }
.slider.is-dragging .slider-fill,
.slider.is-dragging .slider-thumb { transition: none; }

.content {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 0 20px 48px;
}

/* Stays visible while the subject list scrolls */
.content-header {
  position: sticky;
  top: 0;
  z-index: 10;
  margin: 0 -20px;
  height: var(--header-height);
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
}

.stack { display: grid; gap: 10px; }

/* Buttons */
.button {
  font: inherit;
  font-size: 0.9rem;
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
}
.button:hover:not(:disabled) {
  border-color: transparent;
  background: linear-gradient(var(--color-surface), var(--color-surface)) padding-box, var(--gradient-accent) border-box;
}
.button:disabled { opacity: 0.5; cursor: not-allowed; }
.button-primary { font-weight: 600; }
.button-danger { color: var(--color-danger); }
.button-danger:hover:not(:disabled) { border-color: var(--color-danger); background: var(--color-surface); }
.icon-button-danger:hover:not(:disabled) { background: color-mix(in srgb, var(--color-danger) 14%, transparent); }

/* Messages */
.banner {
  padding: 10px 14px;
  border: 1px solid var(--color-danger);
  border-radius: var(--radius);
  color: var(--color-danger);
}
.field-error { color: var(--color-danger); font-size: 0.85rem; }
.hint { color: var(--color-muted); font-size: 0.85rem; }
.empty-state { padding: 32px 16px; text-align: center; color: var(--color-muted); }

/* Subject cards */
.card {
  --progress-color: var(--color-warning);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.card.status-critical { --progress-color: var(--color-danger); }
.card.status-warning { --progress-color: var(--color-warning); }
.card.status-met { --progress-color: var(--color-success); }
.card { transition: box-shadow 0.2s ease; }
.card.expanded {
  box-shadow:
    -8px -6px 22px -8px color-mix(in srgb, var(--color-accent-start) 55%, transparent),
    8px 6px 22px -8px color-mix(in srgb, var(--color-accent-end) 55%, transparent);
}

.card-header { padding: 12px 14px 8px; display: grid; gap: 6px; }

.card-toggle {
  display: grid;
  gap: 10px;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.card-toggle:active { opacity: 0.85; }
.card-title-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.card-name { font-weight: 600; overflow-wrap: anywhere; }
.chevron { font-size: 16px; color: var(--color-muted); transition: transform 0.15s ease; }
.card.expanded .chevron { transform: rotate(180deg); }

.card-progress-row { display: flex; align-items: center; gap: 12px; }
.progress-value { min-width: 4.5em; text-align: right; font-variant-numeric: tabular-nums; color: var(--color-muted); }

/* Straight 2px track with the colored fill drawn on top of it */
.progress { position: relative; flex: 1; height: 6px; }
.progress::before {
  content: "";
  position: absolute;
  inset: 50% 0 auto 0;
  height: 2px;
  transform: translateY(-50%);
  background: var(--color-track);
}
.progress-fill {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: 3px;
  background: var(--progress-color);
  transition: width 0.3s ease;
}

.card-footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px 12px; }
.card-counts { display: flex; flex-wrap: wrap; gap: 4px 24px; margin: 0; font-size: 0.85rem; color: var(--color-muted); }
.card-count strong { color: var(--color-text); font-weight: 600; font-variant-numeric: tabular-nums; }
.card-buttons { display: flex; gap: 4px; margin-left: auto; }

.card-body {
  padding: 4px 14px 14px;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-sunken);
}
.card-body h3 { margin: 14px 0 6px; font-size: 0.85rem; font-weight: 600; color: var(--color-muted); }
.card-body dl {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 12px;
  font-size: 0.9rem;
}
.card-body h3:first-child { margin-top: 10px; }
.card-body dt { color: var(--color-muted); }
.card-body dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }

/* Dialogs and forms */
dialog {
  width: min(380px, calc(100vw - 32px));
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
}
dialog.dialog-wide { width: min(520px, calc(100vw - 32px)); }
dialog::backdrop { background: rgb(0 0 0 / 0.5); }

.dialog-text { color: var(--color-muted); font-size: 0.95rem; }
.dialog-subtitle { margin: 18px 0 8px; font-size: 0.9rem; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }

.field { display: grid; gap: 4px; margin-bottom: 14px; }
.field label { font-size: 0.85rem; color: var(--color-muted); }
.input-row { display: flex; align-items: stretch; gap: 8px; }
.input-row input { flex: 1; min-width: 0; }
.field input {
  font: inherit;
  padding: 6px 8px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-background);
  color: var(--color-text);
}
.field input:read-only { color: var(--color-muted); }
.field input:focus { border-color: var(--color-accent); }
.field input[aria-invalid="true"] { border-color: var(--color-danger); }

/* About dialog */
.key-list {
  margin: 0;
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 8px 0;
  font-size: 0.9rem;
}
.key-list dt { display: flex; align-items: center; justify-content: center; padding-right: 12px; color: var(--color-muted); }
.key-list dd { margin: 0; padding-left: 12px; border-left: 1px solid var(--color-border); }
.swatch { display: block; width: 28px; height: 6px; border-radius: 3px; }
.swatch-critical { background: var(--color-danger); }
.swatch-warning { background: var(--color-warning); }
.swatch-met { background: var(--color-success); }
.about-credit { margin-top: 16px; text-align: center; font-size: 0.8rem; color: var(--color-muted); }
.about-credit + .about-credit { margin-top: 2px; }
.dialog-header { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.dialog-header h2 { margin: 0; }
.about-icon { flex: none; width: 56px; height: 56px; }
.about-credit a { color: var(--color-accent); }
.about-credit .icon { vertical-align: -0.2em; }
kbd {
  padding: 0 6px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-background);
  font: inherit;
  font-size: 0.8rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* Status ring and summary */
.dot-critical { --dot-color: var(--color-danger); }
.dot-warning { --dot-color: var(--color-warning); }
.dot-met { --dot-color: var(--color-success); }

.status-icon-holder { display: grid; place-items: center; }
.status-icon { display: block; width: 26px; height: 26px; }
.status-icon .dot { fill: var(--dot-color); }
.status-icon .status-empty { fill: none; stroke: var(--color-muted); stroke-width: 2.4; stroke-linecap: round; stroke-dasharray: 0.1 3.6; }

.status-total { margin-bottom: 12px; color: var(--color-muted); font-size: 0.95rem; }
.status-row { display: flex; align-items: center; gap: 10px; padding: 6px 0; }
.status-dot { flex: none; width: 10px; height: 10px; border-radius: 50%; background: var(--dot-color); }
.status-label { flex: 1; }
.status-count { font-variant-numeric: tabular-nums; }
.status-names { display: grid; gap: 2px; margin: -2px 0 6px 20px; padding: 0; list-style: none; color: var(--color-muted); font-size: 0.85rem; overflow-wrap: anywhere; }

/* Import */
.steps { margin: 0 0 12px; padding-left: 20px; display: grid; gap: 4px; color: var(--color-muted); font-size: 0.9rem; }
.code-box {
  display: block;
  width: 100%;
  padding: 8px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-background);
  color: var(--color-text);
  font: 0.8rem/1.4 ui-monospace, Menlo, Consolas, monospace;
  resize: vertical;
}
.code-box:focus { border-color: var(--color-accent); }
#bookmarklet-code { word-break: break-all; }
.import-tools { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.link-button { display: inline-block; text-decoration: none; cursor: grab; }

.import-list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  max-height: 40dvh;
  overflow: auto;
  border: 1px solid var(--color-border);
  border-radius: 6px;
}
.import-row { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; padding: 8px 10px; border-bottom: 1px solid var(--color-border); font-size: 0.9rem; }
.import-row:last-child { border-bottom: 0; }
.import-name { overflow-wrap: anywhere; }
.import-counts { color: var(--color-muted); font-variant-numeric: tabular-nums; }
.import-problem { grid-column: 1 / -1; color: var(--color-danger); font-size: 0.8rem; }
.import-row.has-problem .import-name { color: var(--color-muted); }
.import-mode { margin: 14px 0 0; padding: 0; border: 0; display: grid; gap: 8px; font-size: 0.9rem; }
.import-mode legend { padding: 0; margin-bottom: 6px; color: var(--color-muted); font-size: 0.85rem; }
.import-mode label { display: flex; align-items: center; gap: 8px; cursor: pointer; }

/* Projection */
.projection-controls { display: grid; gap: 12px; margin-top: 14px; }
.projection-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 16px; }

.segmented { display: inline-grid; grid-template-columns: 1fr 1fr; gap: 2px; padding: 2px; border: 1px solid var(--color-border); border-radius: var(--radius); }
.segmented label { position: relative; cursor: pointer; }
.segmented input { position: absolute; inset: 0; margin: 0; opacity: 0; cursor: pointer; }
.segmented span { display: block; padding: 4px 16px; text-align: center; border: 1px solid transparent; border-radius: 6px; font-size: 0.9rem; color: var(--color-muted); }
.segmented input:checked + span {
  color: var(--color-text);
  font-weight: 600;
  background: linear-gradient(var(--color-surface), var(--color-surface)) padding-box, var(--gradient-accent) border-box;
}
.segmented input:focus-visible + span { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* Number dial: the centre number is the one used; the numbers around it shrink and fade away */
.dial-group { display: flex; align-items: center; gap: 1px; }
.dial { position: relative; width: 104px; border-radius: var(--radius); cursor: ns-resize; touch-action: none; user-select: none; }
.dial-values {
  display: grid;
  justify-items: center;
  padding-left: 6px;
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 30%, #000 70%, transparent);
  mask-image: linear-gradient(to bottom, transparent, #000 30%, #000 70%, transparent);
}
.dial-item { display: grid; place-items: center; line-height: 1; font-variant-numeric: tabular-nums; cursor: pointer; }
.dial-center { height: 36px; font-size: 1.6rem; font-weight: 700; color: var(--color-text); }
.dial-near { height: 28px; font-size: 1.2rem; color: var(--color-muted); opacity: 0.75; }
.dial-far { height: 22px; font-size: 0.9rem; color: var(--color-muted); opacity: 0.45; }
.dial-indicator { position: absolute; top: 50%; left: 0; width: 14px; height: 14px; transform: translateY(-50%); font-size: 14px; }
.dial-input {
  width: 104px;
  padding: 6px 8px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-background);
  color: var(--color-text);
  font: inherit;
  text-align: center;
}
.dial-input:focus { border-color: var(--color-accent); }
.dial-unit { color: var(--color-muted); font-size: 0.9rem; }

/* A card shown inside a dialog: always open, nothing to click */
.card.preview {
  box-shadow:
    -8px -6px 22px -8px color-mix(in srgb, var(--color-accent-start) 55%, transparent),
    8px 6px 22px -8px color-mix(in srgb, var(--color-accent-end) 55%, transparent);
}
.projection-stage {
  margin-top: 14px;
  padding: 36px;
  border-radius: var(--radius);
  background: var(--color-surface-sunken);
}
.projection-stage:empty { display: none; }
.card-toggle.is-static { cursor: default; }
.progress-marker { position: absolute; top: -3px; bottom: -3px; width: 2px; transform: translateX(-50%); border-radius: 1px; background: var(--color-text); opacity: 0.7; }

/* Number boxes: the browser's own spinners are replaced by two small chevron buttons */
.number-field { position: relative; display: flex; }
.number-field input { width: 100%; padding-right: 28px; -moz-appearance: textfield; appearance: textfield; }
.number-field input::-webkit-outer-spin-button,
.number-field input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.number-spins { position: absolute; top: 2px; right: 2px; bottom: 2px; display: flex; flex-direction: column; justify-content: center; }
.number-spin {
  display: grid;
  place-items: center;
  width: 22px;
  height: 16px;
  line-height: 1;
  padding: 0;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--color-muted);
  font-size: 12px;
  cursor: pointer;
}
.number-spin + .number-spin { margin-top: -4px; }
.number-spin:hover { color: var(--color-text); }
.number-spin .icon.is-up { transform: rotate(180deg); }
.number-spin .icon { width: 12px; height: 12px; display: block; }