/* tanmai
 *
 * One set of tokens, mirrored from R/app_theme.R, driving both Bootstrap's
 * widgets and this app's hand-built pieces. Colours key off [data-bs-theme],
 * which is what bslib's dark-mode switch toggles - keying off
 * prefers-color-scheme instead would look correct on load and then ignore the
 * switch.
 */

:root {
  --cv-accent: #1f9d61;
  --cv-accent-soft: rgba(31, 157, 97, 0.12);
  --cv-accent-line: rgba(31, 157, 97, 0.35);

  --cv-bg: #f6f7f9;
  --cv-surface: #ffffff;
  --cv-surface-2: #f2f4f7;
  --cv-ink: #12151a;
  --cv-ink-2: #495260;
  --cv-ink-3: #79828f;
  --cv-line: rgba(16, 22, 32, 0.09);
  --cv-line-strong: rgba(16, 22, 32, 0.16);

  --cv-danger: #d1394a;
  --cv-warn: #c2760c;
  --cv-info: #2b6cb0;

  --cv-shadow-sm: 0 1px 2px rgba(16, 22, 32, 0.05);
  --cv-shadow: 0 1px 3px rgba(16, 22, 32, 0.06), 0 8px 24px rgba(16, 22, 32, 0.05);

  --cv-r-sm: 0.45rem;
  --cv-r: 0.65rem;
  --cv-r-lg: 0.9rem;

  --cv-gap: 1rem;
  --cv-gap-lg: 1.5rem;

  --cv-mono: "JetBrains Mono", "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
}

[data-bs-theme="dark"] {
  --cv-accent: #34c583;
  --cv-accent-soft: rgba(52, 197, 131, 0.14);
  --cv-accent-line: rgba(52, 197, 131, 0.4);

  --cv-bg: #0d1014;
  --cv-surface: #14181f;
  --cv-surface-2: #1a1f28;
  --cv-ink: #e8ebef;
  --cv-ink-2: #a3adba;
  --cv-ink-3: #78828f;
  --cv-line: rgba(255, 255, 255, 0.09);
  --cv-line-strong: rgba(255, 255, 255, 0.16);

  --cv-danger: #f2637a;
  --cv-warn: #e3a13c;
  --cv-info: #6aa9e9;

  --cv-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --cv-shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);
}

body {
  background: var(--cv-bg);
  color: var(--cv-ink);
  -webkit-font-smoothing: antialiased;
}

/* ---- shell ------------------------------------------------------------- */

.navbar {
  border-bottom: 1px solid var(--cv-line);
  background: var(--cv-surface) !important;
  box-shadow: var(--cv-shadow-sm);
}
.cv-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.cv-brand-mark {
  display: grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--cv-r-sm);
  background: var(--cv-accent);
  color: #fff;
  font-size: 1.05rem;
  line-height: 1;
}
.cv-brand-name {
  font-weight: 660;
  letter-spacing: -0.015em;
}
.cv-brand-sub {
  font-weight: 500;
  color: var(--cv-ink-3);
  margin-left: 0.15rem;
}
.cv-navlink {
  color: var(--cv-ink-2);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
}
.cv-navlink:hover {
  color: var(--cv-ink);
}

.cv-page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.75rem 1rem 4rem;
  display: flex;
  flex-direction: column;
  gap: var(--cv-gap-lg);
}

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

.cv-section-head {
  margin-bottom: 0.9rem;
}
.cv-section-titleline {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.cv-section-title {
  font-size: 1.05rem;
  font-weight: 640;
  letter-spacing: -0.01em;
  margin: 0;
}
.cv-section-lead {
  color: var(--cv-ink-2);
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 0.4rem 0 0;
  max-width: 68ch;
}
.cv-step {
  display: grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  flex: 0 0 1.5rem;
  border-radius: 50%;
  background: var(--cv-accent-soft);
  color: var(--cv-accent);
  font-size: 0.78rem;
  font-weight: 680;
}

.cv-card {
  background: var(--cv-surface);
  border: 1px solid var(--cv-line);
  border-radius: var(--cv-r-lg);
  box-shadow: var(--cv-shadow);
  padding: 1.25rem;
}
.cv-card-flush {
  padding: 0;
  overflow: hidden;
}

/* ---- controls ---------------------------------------------------------- */

.btn {
  border-radius: var(--cv-r-sm);
  padding: 0.45rem 0.9rem;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}
.btn-primary {
  background: var(--cv-accent);
  border-color: var(--cv-accent);
}
.btn-primary:hover,
.btn-primary:focus {
  filter: brightness(0.94);
  background: var(--cv-accent);
  border-color: var(--cv-accent);
}
.btn-default,
.btn-secondary {
  background: var(--cv-surface);
  border: 1px solid var(--cv-line-strong);
  color: var(--cv-ink);
}
.btn-default:hover,
.btn-secondary:hover {
  background: var(--cv-surface-2);
  color: var(--cv-ink);
}

.form-control,
.form-select {
  background: var(--cv-surface);
  border-color: var(--cv-line-strong);
  color: var(--cv-ink);
  border-radius: var(--cv-r-sm);
}
.form-control:focus,
.form-select:focus {
  border-color: var(--cv-accent);
  box-shadow: 0 0 0 3px var(--cv-accent-soft);
}
.control-label,
.shiny-input-container > label,
.form-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--cv-ink-3);
  margin-bottom: 0.35rem;
}

/* Radios and checkboxes as pill-style choices rather than bare list items. */
.cv-choices .shiny-options-group,
.cv-choices .shiny-input-radiogroup {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.cv-choices .radio,
.cv-choices .form-check {
  margin: 0;
  padding: 0;
}
.cv-choices .radio label,
.cv-choices .form-check label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--cv-line-strong);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--cv-ink-2);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.cv-choices .radio label:hover,
.cv-choices .form-check label:hover {
  border-color: var(--cv-accent-line);
  color: var(--cv-ink);
}
.cv-choices input[type="radio"]:checked + span,
.cv-choices .form-check-input:checked ~ .form-check-label {
  color: var(--cv-ink);
  font-weight: 560;
}

/* ---- drop / paste zone ------------------------------------------------- */

.paste-zone {
  border: 1.5px dashed var(--cv-line-strong);
  border-radius: var(--cv-r);
  padding: 1.5rem 1rem;
  text-align: center;
  cursor: pointer;
  color: var(--cv-ink-2);
  background: var(--cv-surface-2);
  outline: none;
  font-size: 0.9rem;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.paste-zone:hover {
  border-color: var(--cv-accent-line);
  color: var(--cv-ink);
}
.paste-zone:focus {
  border-color: var(--cv-accent);
  background: var(--cv-accent-soft);
  color: var(--cv-ink);
}

.cv-dropzone-title {
  font-weight: 600;
  color: var(--cv-ink);
  display: block;
  margin-bottom: 0.15rem;
}
.cv-dropzone-hint {
  font-size: 0.82rem;
  color: var(--cv-ink-3);
}

/* Shiny's file input, made to sit beside the paste zone without shouting. */
.cv-file .form-control {
  border-style: dashed;
}
.cv-file .input-group-btn > .btn,
.cv-file .input-group-text {
  border-radius: var(--cv-r-sm);
}
.cv-file .progress {
  height: 0.35rem;
  margin-top: 0.4rem;
}

/* ---- board ------------------------------------------------------------- */

.cv-board-wrap {
  display: flex;
  align-items: stretch;
  gap: 0.6rem;
  max-width: 560px;
}
.cv-board {
  flex: 1 1 auto;
  min-width: 0;
  position: relative;
  border-radius: var(--cv-r);
  overflow: hidden;
  box-shadow: var(--cv-shadow);
}
/* The arrow overlay sits on top of the board without eating drag events. */
.cv-board .cv-arrows {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 20;
}
.cv-evalbar {
  width: 14px;
  flex: 0 0 14px;
  display: flex;
  flex-direction: column;
  border-radius: 999px;
  overflow: hidden;
  background: var(--cv-surface-2);
  border: 1px solid var(--cv-line);
}
.cv-evalbar-black {
  background: #2a2f38;
  height: 50%;
  transition: height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.cv-evalbar-white {
  background: #f0f2f5;
  height: 50%;
  transition: height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.cv-board-controls {
  margin-top: 0.9rem;
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

/* ---- stepping through the line ----------------------------------------- */
/* One joined cluster rather than four loose buttons, because they are one
   control: the eye should land on the group and the arrows read as a strip. */
.cv-board-nav {
  margin-top: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.cv-board-nav .btn {
  flex: 1 1 0;
  min-width: 0;
  /* Square-ish and finger-sized. These get pressed repeatedly, often on a
     phone, so they are the one place worth spending width on. */
  min-height: 2.5rem;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  padding-inline: 0.5rem;
}

.cv-nav-hint {
  margin-top: 0.35rem;
  font-size: 0.78rem;
  color: var(--bs-secondary-color, #8a8f98);
}

/* A touch device has no arrow keys to press, so the hint is only noise. */
@media (hover: none) and (pointer: coarse) {
  .cv-nav-hint {
    display: none;
  }
}

/* The counter must not resize the buttons as it counts past 9 and 99, so it
   is fixed-width and tabular. */
.cv-nav-ply {
  flex: 0 0 auto;
  min-width: 4.5rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  color: var(--bs-secondary-color, #8a8f98);
}

/* ---- evaluation readout ------------------------------------------------ */

.cv-eval-headline {
  font-size: 2.25rem;
  font-weight: 680;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}
.cv-eval-sub {
  color: var(--cv-ink-3);
  font-size: 0.8rem;
  margin-top: 0.2rem;
}

.cv-panel-label {
  font-size: 0.72rem;
  font-weight: 680;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cv-ink-3);
  margin-bottom: 0.45rem;
}

.cv-line {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--cv-line);
  font-size: 0.88rem;
}
.cv-line:last-child {
  border-bottom: 0;
}
.cv-line-score {
  font-weight: 640;
  min-width: 3.4rem;
  font-variant-numeric: tabular-nums;
  color: var(--cv-ink);
}
.cv-line-move {
  font-weight: 620;
  min-width: 3.2rem;
}
.cv-line-pv {
  color: var(--cv-ink-3);
  font-family: var(--cv-mono);
  font-size: 0.76rem;
  word-break: break-all;
}
.cv-movelist {
  font-family: var(--cv-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  max-height: 9rem;
  overflow-y: auto;
  word-break: break-word;
  color: var(--cv-ink-2);
}

.fen-code {
  font-family: var(--cv-mono);
  font-size: 0.76rem;
  word-break: break-all;
  background: var(--cv-surface-2);
  border: 1px solid var(--cv-line);
  padding: 0.5rem 0.6rem;
  border-radius: var(--cv-r-sm);
  display: block;
  color: var(--cv-ink-2);
}

/* ---- blunder radar ----------------------------------------------------- */

.cv-radar-controls .form-group {
  margin-bottom: 0.4rem;
}
.cv-radar-summary {
  padding: 0.65rem 0.8rem;
  margin: 0.5rem 0 0.65rem;
  font-size: 0.86rem;
  border-radius: var(--cv-r-sm);
  border: 1px solid transparent;
  line-height: 1.5;
}
.cv-radar-caption {
  font-size: 0.78rem;
  margin-bottom: 0.3rem;
  color: var(--cv-ink-3);
}
.cv-risk-bad {
  color: var(--cv-danger);
  font-weight: 620;
  font-size: 0.78rem;
}

/* Bootstrap's alerts, toned to the palette so they read as part of the page. */
.alert {
  border-radius: var(--cv-r-sm);
  border: 1px solid var(--cv-line);
  font-size: 0.88rem;
}
.alert-success {
  background: var(--cv-accent-soft);
  border-color: var(--cv-accent-line);
  color: var(--cv-ink);
}
.alert-warning {
  background: rgba(194, 118, 12, 0.1);
  border-color: rgba(194, 118, 12, 0.32);
  color: var(--cv-ink);
}
.alert-danger {
  background: rgba(209, 57, 74, 0.1);
  border-color: rgba(209, 57, 74, 0.32);
  color: var(--cv-ink);
}
.alert-info {
  background: rgba(43, 108, 176, 0.1);
  border-color: rgba(43, 108, 176, 0.3);
  color: var(--cv-ink);
}

/* ---- previews ---------------------------------------------------------- */

.board-preview img {
  max-width: 100%;
  border: 1px solid var(--cv-line);
  border-radius: var(--cv-r);
  display: block;
}

/* ---- live capture ------------------------------------------------------ */

.cv-capture-preview {
  width: 100%;
  max-width: 320px;
  border: 1px solid var(--cv-line);
  border-radius: var(--cv-r);
  background: var(--cv-surface-2);
  display: block;
}
.cv-hidden-video {
  display: none;
}
.cv-capture-hint {
  font-size: 0.8rem;
  margin-top: 0.5rem;
  color: var(--cv-ink-3);
  line-height: 1.5;
}
.cv-live-paste {
  margin-top: 0.75rem;
  padding: 0.9rem;
  font-size: 0.85rem;
}
.cv-live-moves {
  margin-top: 0.5rem;
}

/* ---- tap to move ------------------------------------------------------- */

/* The squares chessboard.js draws are plain divs, so the highlight goes on
   them directly. Inset shadow rather than background, so the square's own
   light/dark colour still reads underneath. */
.cv-board [data-square].cv-sq-selected {
  box-shadow: inset 0 0 0 3px var(--cv-accent);
}
/* A dot for an empty destination, a ring for a capture - the convention every
   chess app uses, so it needs no explaining. */
.cv-board [data-square].cv-sq-target::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 28%;
  height: 28%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--cv-accent);
  opacity: 0.55;
  pointer-events: none;
}
.cv-board [data-square] {
  position: relative;
}
.cv-board [data-square].cv-sq-target:has(img)::after {
  width: 88%;
  height: 88%;
  background: transparent;
  border: 4px solid var(--cv-accent);
  opacity: 0.6;
}

/* ---- section layouts --------------------------------------------------- */

/* Intake: file input and its options side by side, stacking on narrow. */
.cv-intake {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--cv-gap) var(--cv-gap-lg);
  align-items: start;
}
.cv-options {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.cv-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.35rem;
}
.cv-readout {
  display: grid;
  grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  gap: var(--cv-gap-lg);
  margin-top: 1.15rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--cv-line);
}

/* Board: the board itself gets the room, analysis sits alongside. */
.cv-board-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: var(--cv-gap-lg);
  align-items: start;
}
.cv-analysis-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.cv-eval-block {
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--cv-line);
}
.cv-subpanel + .cv-subpanel,
.cv-eval-block + .cv-subpanel {
  padding-top: 0.15rem;
}

/* Live: capture controls on the left, the running game on the right. */
.cv-live-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: var(--cv-gap-lg);
  align-items: start;
}
.cv-live-capture,
.cv-live-game {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Tracking settings, folded away: they are set once and then ignored, so
   they should not occupy the same visual weight as the game itself. */
.cv-settings {
  border: 1px solid var(--cv-line);
  border-radius: var(--cv-r-sm);
  background: var(--cv-surface-2);
}
.cv-settings > summary {
  cursor: pointer;
  padding: 0.55rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--cv-ink-2);
  list-style: none;
}
.cv-settings > summary::-webkit-details-marker {
  display: none;
}
.cv-settings > summary::before {
  content: "\203A";
  display: inline-block;
  margin-right: 0.45rem;
  transition: transform 0.15s;
}
.cv-settings[open] > summary::before {
  transform: rotate(90deg);
}
.cv-settings-body {
  padding: 0 0.75rem 0.75rem;
  border-top: 1px solid var(--cv-line);
  padding-top: 0.75rem;
}
.cv-settings-body .form-group {
  margin-bottom: 0.65rem;
}
.cv-cal-preview {
  margin-top: 0.75rem;
  max-width: 340px;
}

/* ---- responsive -------------------------------------------------------- */

@media (max-width: 991.98px) {
  .cv-board-layout,
  .cv-live-layout,
  .cv-readout,
  .cv-intake {
    grid-template-columns: minmax(0, 1fr);
  }
  .cv-board-wrap {
    max-width: 100%;
  }
  .cv-eval-headline {
    font-size: 1.9rem;
  }
  .cv-cal-preview,
  .cv-capture-preview {
    max-width: 100%;
  }
}
@media (max-width: 575.98px) {
  .cv-page {
    padding: 1.25rem 0.75rem 3rem;
    gap: 1.15rem;
  }
  .cv-card {
    padding: 1rem;
    border-radius: var(--cv-r);
  }
  /* The board is the reason to be here; on a phone it should not be a
     postage stamp beside a full-height eval bar. */
  .cv-board-wrap {
    gap: 0.4rem;
  }
  .cv-eval-headline {
    font-size: 1.6rem;
  }
  .cv-board-controls .btn {
    flex: 1 1 auto;
  }
  .cv-board-nav .btn {
    min-height: 2.75rem;
  }
}

/* Touch input, regardless of width. A 19px radio is not hittable with a
   thumb; the accessibility floor for a touch target is about 44px. */
@media (pointer: coarse) {
  .btn,
  .cv-choices .radio label,
  .cv-choices .form-check label,
  .form-control,
  .form-select,
  .cv-settings > summary {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  .form-control,
  .form-select {
    display: block;
  }
  .cv-choices input[type="radio"],
  .cv-choices input[type="checkbox"],
  .form-check-input {
    width: 1.15rem;
    height: 1.15rem;
  }
  .paste-zone {
    padding: 1.75rem 1rem;
  }
  /* Dragging is fiddly on a small board; tapping is the primary interaction,
     so stop a long-press turning into a text selection or a callout. */
  .cv-board [data-square] {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
  }
}

/* ---- FEN / PGN entry --------------------------------------------------- */

.cv-fen-row {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
}
.cv-fen-row .form-group {
  flex: 1 1 auto;
  margin-bottom: 0;
  min-width: 0;
}
.cv-fen-row input {
  font-family: var(--cv-mono);
  font-size: 0.8rem;
}
.cv-fen-entry,
.cv-pgn-entry {
  margin-top: 0.75rem;
}
.cv-pgn-entry textarea {
  font-family: var(--cv-mono);
  font-size: 0.8rem;
  line-height: 1.5;
}