/* eInkChess – einfache, E‑Ink-freundliche Gestaltung */

:root {
  --bg: #f5f5f5;
  --bg-alt: #e3e3e3;
  --border: #111;
  --text: #111;
  --muted: #555;
  --accent: #111;
  --danger: #900;
  --square-light: #fdfdfd;
  --square-dark: #d5d5d5;
  --square-selected: #bbb;
  --square-last: #c5e1ff;
  --radius: 10px;
  --shadow: 0 0 0 1px #000;
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
}

#app {
  max-width: 680px;
  margin: 0 auto;
  padding: 0.3rem;
}

.app-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-bottom: 0.3rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.2rem;
}

.title-wrap h1 {
  font-size: 1.4rem;
  margin: 0;
}

.app-title-link {
  color: inherit;
  text-decoration: none;
}

.app-title-link:visited {
  color: inherit;
}

.app-title-link:active,
.app-title-link:hover,
.app-title-link:focus {
  text-decoration: underline;
}

.app-title-author-link {
  color: inherit;
  text-decoration: none;
}

.app-title-author-link:visited {
  color: inherit;
}

.app-title-author-link:hover,
.app-title-author-link:active,
.app-title-author-link:focus {
  text-decoration: underline;
}


.subtitle {
  margin: 0.1rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.user-panel {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.25rem;
  font-size: 0.8rem;
}

#user-status {
  text-align: right;
  white-space: nowrap;
  max-width: 100%;
  overflow-x: auto;
}

button {
  font-family: inherit;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: #fff;
  padding: 0.35rem 0.75rem;
  font-size: 0.9rem;
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  color: #fff;
}

button.secondary {
  background: var(--bg-alt);
}

button.small {
  font-size: 0.7rem;
  padding: 0.2rem 0.4rem;
}


button:disabled {
  opacity: 0.5;
  cursor: default;
}

.hidden {
  display: none !important;
}

.mode-section {
  margin: 0.5rem 0;
}

.mode-section h2 {
  font-size: 1rem;
  margin: 0 0 0.35rem;
}

.mode-section-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.mode-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.mode-buttons .mode-btn {
  border-radius: 2px;
}

.mode-buttons .mode-btn.active-mode {
  background: #ffffff;
  color: #000000;
  border: 2px solid #000000;
}


.card {
  background: transparent;
  border-radius: 0;
  box-shadow: none;
  padding: 0.25rem 0;
  margin-bottom: 0.25rem;
}

.field-row {
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.field-row label {
  font-size: 0.9rem;
}

.field-row select {
  flex: 1;
  padding: 0.25rem 0.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #fff;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.status-text {
  font-size: 0.8rem;
  color: var(--muted);
  min-height: 1.2em;
}

.game-clocks {
  font-size: 0.8rem;
}

/* Brett */

#board-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.board-header {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.board-header-tools {
  display: flex;
  justify-content: flex-end;
  gap: 0.25rem;
  margin-top: 0.15rem;
}


#game-label {
  font-weight: 600;
  font-size: 0.95rem;
}

#game-meta {
  font-size: 0.8rem;
  color: var(--muted);
}


#game-result {
  font-size: 0.75rem;
  color: var(--muted);
}


#board-container {
  width: 100%;
  text-align: center;
}

#board {
  display: block;
  width: 100%;
  max-width: 440px;
  border: 2px solid var(--border);
  background: var(--square-light);
  box-sizing: border-box;
  overflow: hidden;
  margin: 0 auto;
}

/* Fallback, falls aspect-ratio nicht unterstützt wird, kümmert sich JS */

.square {
  position: relative;
  border-radius: 0;
  width: 12.5%;
  float: left;
  border: none;
  padding: 0;
  font-size: 1.8rem;
  line-height: 1;
  text-align: center;
  box-sizing: border-box;
}

.square.light {
  background: var(--square-light);
}

.square.dark {
  background: var(--square-dark);
}


/* Auswahl-Markierung für ein Feld */

.square.last-move {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.square.selected {
  outline: 2px solid var(--border);
}

/* Züge unter dem Brett in einer Zeile, horizontal scrollend */
.moves-list {
  font-size: 0.7rem;
  line-height: 1.3;
  border-top: 1px solid var(--border);
  padding-top: 0.15rem;
  white-space: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
}

.moves-list.hidden {
  display: none;
}


/* Coordinate overlays inside squares.
   We only draw them on the "outer" ranks/files of the *visible* board:
   - left edge: rank number
   - bottom edge: file letter
   This works for both white and black orientation. */
.square[data-show-rank="1"]::before {
  content: attr(data-rank);
  position: absolute;
  top: 2px;
  left: 2px;
  font-size: 0.7rem;
  opacity: 0.9;
}

.square[data-show-file="1"]::after {
  content: attr(data-file);
  position: absolute;
  bottom: 2px;
  right: 2px;
  font-size: 0.7rem;
  opacity: 0.9;
}


.piece-black {
  color: #000;
}

.piece-white {
  color: #000;
}

/* Mobile tweaks */

@media (max-width: 600px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .user-panel {
    align-items: flex-start;
  }
}


/* Mode-Header mit About rechts */
.mode-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.mode-about-inline {
  font-size: 0.6rem;
  text-align: right;
  flex: 1;
}

.mode-about-inline a {
  text-decoration: underline;
}


.app-title-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.app-title-author {
  font-size: 0.7rem;
  color: var(--muted);
}


.inline-options {
  display: inline-flex;
  gap: 0.25rem;
  margin-left: 0.5rem;
}

/* Compact selects for inline controls (offline level + online time) */
#offline-ai-controls #ai-level-inline,
#online-controls .online-inline-row > select#time-profile {
  flex: 0 0 auto;
  width: auto;
}
.ai-color-btn.active {
  background: var(--accent);
  color: #fff;
}

#online-controls .online-inline-row {
  flex-wrap: wrap;
  width: 100%;
}

#online-controls .online-inline-row > select#time-profile {
  flex: 0 0 auto;
  width: auto;
}

#online-controls .online-inline-row .online-action-right {
  margin-left: auto;
  display: inline-flex;
  gap: 0.5rem;
}


html.is-ereader {
  --bg: #ffffff;
  --bg-alt: #f3f3f3;
  --square-light: #ffffff;
  --square-dark: #bfbfbf;
  --accent: #000000;
}


.board-header {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.board-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-start;
  flex-wrap: wrap;
}

.board-actions .small {
  padding: 0.2rem 0.6rem;
  font-size: 0.85rem;
}


/* color-choice labels for AI color selection (pawns instead of text) */
.inline-options .color-choice {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 1.2rem;
}


#undo-btn {
  padding-left: 0.2rem;
  padding-right: 0.2rem;
}


.board-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10rem;
  padding: 1.5rem 0;
  color: var(--muted);
}





.board-placeholder-icon {
  font-size: 1em;
  line-height: 1;
}

.board-placeholder-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-left: 0.4em;
}

.board-placeholder-title {
  font-size: 0.35em;
  line-height: 1;
}

.board-placeholder-subtitle {
  font-size: 0.18em;
  line-height: 1.1;
  opacity: 0.8;
}


.score-line {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  font-size: 0.7rem;
  line-height: 1.3;
  border-top: 1px solid var(--border);
  padding-top: 0.15rem;
  color: var(--muted);
  column-gap: 0.5rem;
}

.score-line.hidden {
  display: none;
}

.score-line-captures {
  justify-self: center;
  white-space: nowrap;
}

.score-line-diff {
  justify-self: end;
  white-space: nowrap;
}


/* High-contrast mode for older E‑Ink panels */
body.high-contrast {
  --bg: #ffffff;
  --bg-alt: #f0f0f0;
  --border: #000000;
  --text: #000000;
  --muted: #000000;
  --accent: #000000;
  --danger: #000000;
  --square-light: #ffffff;
  --square-dark: #e0e0e0;
  --square-selected: #b0b0b0;
  --square-last: #000000;
}

/* Last move besonders klar markieren im High-Contrast-Modus */
body.high-contrast .square.last-move {
  box-shadow: inset 0 0 0 2px #000000;
}


/* About page */
.about-donate {
  margin-top: 1rem;
  font-size: 0.9rem;
}

.btn-donate {
  display: inline-block;
  padding: 0.4rem 0.75rem;
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  word-break: normal;
}

.btn-donate:visited {
  color: #fff;
}

.btn-donate:hover,
.btn-donate:active,
.btn-donate:focus {
  text-decoration: underline;
}

/* Keep long links in other contexts from breaking layouts */
.about-donate a {
  word-break: break-all;
}

.about-qr {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
}

.about-qr img {
  max-width: 180px;
  height: auto;
  border: 1px solid var(--border);
  padding: 0.25rem;
  border-radius: 4px;
}

.about-back {
  margin-top: 1.25rem;
  font-size: 0.85rem;
}