/* =========================================================
   Sudoku Street Fight — Stylesheet
   ========================================================= */

:root {
  /* Neutral greyscale — all channels equal */
  --bg:             #f2f2f2;  /* page background */
  --surface:        #ffffff;  /* cards, panels */
  --border:         #e5e5e5;  /* general borders */
  --text-primary:   #111111;  /* main text */
  --text-secondary: #333333;  /* secondary text */
  --text-tertiary:  #555555;  /* muted / toggle-off */
  --grid-border:    #d5d5d5;  /* thin sudoku lines */
  --grid-box-border:#888888;  /* thick 3×3 box lines */
  --cell-given-bg:  var(--bg);/* given cells blend with page bg */

  /* Brand accent — purple between P1 cyan and P2 magenta */
  --accent:       #8B49FF;
  --accent-light: #EDE0FF;
  --accent-hover: #7235e0;

  /* Shared layout */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  /* Typography */
  --font:         'Roboto Mono', monospace;
  --font-display: 'Barlow Condensed', sans-serif; /* weight 900 only — FIGHT! KO VICTORY etc */

  /* Type scale */
  --text-xs:   10px;  /* fine print */
  --text-sm:   12px;  /* settings labels, status text */
  --text-base: 14px;  /* body, HUD info */
  --text-md:   18px;  /* player names, round label, lobby labels */
  --text-lg:   22px;  /* start prompt, carousel btns */
  --text-xl:   26px;  /* screen titles, timer */
  --text-2xl:  28px;  /* KO block, lobby VS */
  --text-3xl:  66px;  /* match end title */
  --text-4xl:  96px;  /* main overlay (FIGHT! KO VICTORY) */

  /* Weight scale */
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold:   700;
  --weight-heavy:  800;
  --weight-black:  900;

  /* Player 1 — blue-cyan ramp */
  --p1-color:    #17B9EF;
  --p1-mid-dark: #0A8FBB;  /* between main and dark — use for white-text shadows */
  --p1-dark:     #006B8F;
  --p1-bg-light: #E5F7FD;
  --p1-bg-mid:   #B8ECFB;

  /* Player 2 — magenta ramp */
  --p2-color:    #F31299;
  --p2-mid-dark: #BC0074;  /* between main and dark — use for white-text shadows */
  --p2-dark:     #880055;
  --p2-bg-light: #FFEBF8;
  --p2-bg-mid:   #FFD0EF;

  /* Danger — red ramp */
  --danger-color:    #F00013;
  --danger-dark:     #A8000F;
  --danger-bg-light: #FFEBEC;
  --danger-bg-mid:   #FFCED1;

  /* Shared action colours */
  --orange: #FF8B16;
  --yellow: #FFCA00;

  /*
   * Hard text-shadow offset scale (offset grows with type size):
   *   10–12px  → 1px 1px
   *   13–15px  → 1px 2px
   *   16–20px  → 2px 2px
   *   22–26px  → 2px 3px
   *   28–34px  → 3px 3px
   *   40–60px  → 3px 4px
   *   70px+    → 4px 5px
   */
  --text-layer-shadow: 2px 2px 0 var(--accent);

  /* Header */
  --header-h: 48px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: var(--text-base);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  touch-action: manipulation; /* disable double-tap zoom globally */
}

/* =========================================================
   Persistent Header
   ========================================================= */

.app-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  z-index: 900;
  pointer-events: none;
}

.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: all;
}


/* Utility button — semi-transparent dark pill for unemphasised functional actions
   (settings icon, carousel chevrons, etc.) */
.btn-utility {
  font-weight: var(--weight-bold);
  background: rgba(0,0,0,0.35);
  border: none;
  border-radius: var(--radius-sm);
  color: #ffffff;
  font-weight: var(--weight-bold);
  cursor: pointer;
  transition: background 0.15s;
}
.btn-utility:hover { background: rgba(0,0,0,0.55); }


/* Icon button shape — pair with .btn-utility for the full style */
.header-icon-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* =========================================================
   Settings Panel
   ========================================================= */

.settings-panel {
  position: fixed;
  top: calc(var(--header-h) + 4px);
  right: 12px;
  background: rgba(20,20,20,0.96);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 901;
  min-width: 220px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
}
.settings-panel.hidden { display: none; }

.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.settings-item.track-row {
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.settings-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  letter-spacing: 0.1em;
  color: #ffffff;
  text-shadow: var(--text-layer-shadow);
}

.settings-divider {
  height: 1px;
  background: rgba(255,255,255,0.1);
  margin: 2px 0;
}

/* Track carousel */
.track-carousel {
  display: flex;
  align-items: center;
  gap: 4px;
}

.carousel-btn {
  font-family: var(--font);
  line-height: 1;
  min-width: 44px;
  min-height: 44px;
  padding: 0 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.track-title {
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  color: #ffffff;
  letter-spacing: 0.04em;
  text-align: center;
  width: 160px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Toggle switch */
.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
  cursor: pointer;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; position: absolute; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--text-tertiary);
  border-radius: 24px;
  transition: background 0.2s;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  left: 3px; top: 3px;
  background: #ffffff;
  border-radius: 50%;
  transition: transform 0.2s;
}
.toggle-switch input:checked + .toggle-slider { background: var(--accent); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(20px); }

/* =========================================================
   Screens
   ========================================================= */

.screen {
  display: none;
  width: 100vw; height: 100vh;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: 0; left: 0;
}
.screen.active { display: flex; }

#screen-start,
#screen-character-select,
#screen-lobby {
  background-image: url(/assets/ui/bg_0.svg);
  background-size: cover;
  background-position: center;
}

/* SELECT button no longer needed — character click proceeds directly */
#btn-select-char { display: none; }

/* =========================================================
   Buttons
   ========================================================= */

.btn {
  font-family: var(--font);
  font-size: 15px;
  font-weight: 700;
  padding: 12px 32px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
  box-shadow: 4px 4px 0 #ffffff;
  margin-top: 12px;
}
.btn:hover { background: var(--accent-hover); transform: translate(-1px, -2px); box-shadow: 5px 6px 0 #ffffff; }
.btn:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 #ffffff; }
.btn:disabled { background: var(--border); color: var(--text-tertiary); cursor: not-allowed; transform: none; box-shadow: none; }

/* Small button variant — same colour/shape, reduced size */
.btn.btn-sm {
  font-size: var(--text-sm);
  padding: 5px 14px;
  margin-top: 0;
  box-shadow: 2px 2px 0 #ffffff;
  border-radius: var(--radius-sm);
}
.btn.btn-sm:hover { box-shadow: 3px 3px 0 #ffffff; }
.btn.btn-sm:active { box-shadow: 1px 1px 0 #ffffff; }

/* Secondary button — white background, brand accent text, purple shadow */
.btn-secondary {
  font-family: var(--font);
  font-size: 15px;
  font-weight: 700;
  padding: 12px 32px;
  background: #ffffff;
  color: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
  box-shadow: 4px 4px 0 var(--accent);
  margin-top: 12px;
}
.btn-secondary:hover { background: var(--accent-light); transform: translate(-1px, -2px); box-shadow: 5px 6px 0 var(--accent); }
.btn-secondary:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--accent); }
.btn-secondary:disabled { background: var(--border); color: var(--text-tertiary); cursor: not-allowed; transform: none; box-shadow: none; }

/* =========================================================
   Character Select
   ========================================================= */

/* On desktop the scroll wrapper is invisible — just passes through flex layout */
.char-select-scroll {
  display: contents;
}

@keyframes slam-from-top {
  0%   { transform: translateY(-140%) scale(2.2); opacity: 0; }
  55%  { transform: translateY(5%) scale(0.96); opacity: 1; }
  78%  { transform: translateY(-2%) scale(1.02); opacity: 1; }
  100% { transform: translateY(0) scale(1); opacity: 1; }
}

@keyframes slam-from-bottom {
  0%   { transform: translateY(140%) scale(2.2); opacity: 0; }
  55%  { transform: translateY(-5%) scale(0.96); opacity: 1; }
  78%  { transform: translateY(2%) scale(1.02); opacity: 1; }
  100% { transform: translateY(0) scale(1); opacity: 1; }
}

/* =========================================================
   Start Screen
   ========================================================= */

/* Logo fires immediately on page load — no class trigger needed */
.start-logo-top    { animation: slam-from-top    0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.05s both; }
.start-logo-bottom { animation: slam-from-bottom 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.27s both; }

.start-logo-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin-bottom: 32px;
}

.start-logo-top,
.start-logo-bottom {
  max-width: 380px;
  width: 100%;
  height: auto;
  display: block;
}

.start-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.start-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.start-section-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: #ffffff;
  text-shadow: 1px 1px 0 var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Fixed width shared by all three start-screen CTAs; buttons lose their default margin-top
   since the column gap handles all spacing here */
#screen-start .btn,
#screen-start .join-combo { width: 240px; box-sizing: border-box; }
#screen-start .btn { margin-top: 0; }
#screen-start .join-combo { margin-top: 8px; }

.start-divider {
  width: 240px;
  height: 1px;
  background: rgba(255,255,255,0.25);
  margin: 4px 0;
}

/* Join combo — input + secondary button fused into one fixed-width pill */
.join-combo {
  display: flex;
  height: 32px;
  border: 2px solid #ffffff;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 4px 4px 0 var(--accent);
}

.join-combo .join-input {
  flex: 1;
  min-width: 0;
  background: var(--bg); /* #f2f2f2 — same as cell-given-bg and page bg */
  border: none;
  padding: 0 10px;
  font-family: var(--font);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--text-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  outline: none;
}
.join-combo .join-input::placeholder {
  color: var(--text-tertiary);
  font-weight: var(--weight-normal);
  letter-spacing: 0.01em;
  text-transform: none;
}

.join-combo #btn-join-room {
  flex-shrink: 0;
  height: 100%;
  padding: 0 14px;
  background: #ffffff;
  color: var(--accent);
  font-family: var(--font);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  letter-spacing: 0.05em;
  border: none;
  border-left: 1px solid var(--border);
  border-radius: 0;
  cursor: pointer;
  transition: background 0.12s;
}
.join-combo #btn-join-room:hover  { background: var(--accent-light); }
.join-combo #btn-join-room:active { background: var(--accent); color: #ffffff; }

.start-error {
  font-size: var(--text-sm);
  color: var(--danger-color);
  font-weight: var(--weight-bold);
  text-shadow: 1px 1px 0 rgba(0,0,0,0.4);
  margin: 0;
}
.start-error.hidden { display: none; }

/* Character select — cards hidden until .cards-ready is added by JS */
#screen-character-select:not(.cards-ready) .character-card,
#screen-character-select:not(.cards-ready) .subtitle { opacity: 0; pointer-events: none; }

@keyframes card-appear {
  from { opacity: 0; transform: translateY(22px) scale(0.84); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}

.card-intro {
  animation: card-appear 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.subtitle {
  font-size: var(--text-base);
  color: #ffffff;
  margin-bottom: 32px;
  font-weight: var(--weight-bold);
  text-shadow: 1px 1px 0 var(--accent);
  opacity: 0;
}

#character-grid {
  display: grid;
  grid-template-columns: repeat(5, auto);
  gap: 20px;
  justify-content: center;
}

.character-card {
  width: auto;
  background: var(--surface);
  border-radius: 0;
  cursor: pointer;
  padding: 6px 6px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
  box-shadow: 4px 4px 0 var(--accent);
}
.character-card:hover { transform: translate(-1px, -2px); box-shadow: 5px 6px 0 var(--accent); }
.character-card.selected { background: var(--accent); box-shadow: 4px 4px 0 #ffffff; }
.character-card.selected .char-name { color: #ffffff; }
.character-card img { width: 165px; height: 165px; object-fit: cover; object-position: 50% 12%; border-radius: 0; display: block; transform: scaleX(-1); }
.char-name { font-size: var(--text-base); font-weight: var(--weight-bold); color: var(--text-primary); transition: color 0.15s; }

/* =========================================================
   Lobby
   ========================================================= */

.screen-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-heavy);
  color: var(--text-primary);
  margin-bottom: 24px;
  letter-spacing: -0.7px;
}

.lobby-players { display: flex; align-items: center; gap: 40px; margin: 16px 0 0; }

.lobby-player {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.lobby-player-label {
  font-size: var(--text-md); font-weight: var(--weight-bold); letter-spacing: 0.12em;
  color: #ffffff; text-transform: uppercase;
  text-shadow: var(--text-layer-shadow);
}
.lobby-player img { width: 225px; height: 225px; object-fit: cover; object-position: 50% 12%; image-rendering: pixelated; display: block; border: 4px solid transparent; box-sizing: border-box; }
#lobby-p2-portrait { transform: scaleX(-1); }
.lobby-player > span:first-of-type {
  font-size: var(--text-md); font-weight: var(--weight-bold); color: #ffffff;
  text-shadow: var(--text-layer-shadow);
}

/* Local player highlight */
#lobby-p1.is-me .lobby-player-label { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: var(--weight-black); color: var(--p1-color); text-shadow: 3px 3px 0 #ffffff; }
#lobby-p1.is-me img { border: 8px solid var(--p1-color); }
#lobby-p2.is-me .lobby-player-label { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: var(--weight-black); color: var(--p2-color); text-shadow: 3px 3px 0 #ffffff; }
#lobby-p2.is-me img { border: 8px solid var(--p2-color); }

/* Own sudoku grid — override outer border only via custom properties */
#p1-grid.is-me { --_grid-outline-color: var(--p1-color); --_grid-outline-width: 3px; }
#p2-grid.is-me { --_grid-outline-color: var(--p2-color); --_grid-outline-width: 3px; }


.lobby-vs { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: var(--weight-black); color: #ffffff; letter-spacing: 0; text-shadow: 2px 3px 0 var(--accent); }

.lobby-status {
  font-size: var(--text-sm); font-weight: var(--weight-bold); padding: 3px 10px;
  border-radius: 20px; letter-spacing: 0.04em;
}
.lobby-status.ready { color: #ffffff; background: var(--accent); }
.lobby-status.waiting { color: var(--text-secondary); background: var(--border); }

.lobby-hint { font-size: var(--text-base); color: #ffffff; text-shadow: 1px 2px 0 var(--accent); animation: fade-pulse 1.4s ease-in-out infinite; margin-top: 10px; }

/* Lobby title */
.lobby-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--weight-black);
  color: #ffffff;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-shadow: 2px 2px 0 var(--accent);
  margin: 0;
}

/* Quick Play share — bare (no card) */
.lobby-promo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin: 12px 0 0;
}
.lobby-promo.hidden { display: none; }
/* Reserve space so the button never jumps when feedback appears */
.lobby-promo-feedback {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: rgba(255,255,255,0.85);
  margin: 0;
  visibility: hidden;
}
.lobby-promo-feedback.visible { visibility: visible; }

/* Private Room invite — card */
.lobby-share {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin: 12px 0 0;
  padding: 12px 20px;
  background: rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.25);
}
.lobby-share.hidden { display: none; }
.lobby-share-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: #ffffff;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.lobby-invite-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.lobby-share-code {
  font-family: var(--font);
  font-size: var(--text-xl);
  font-weight: var(--weight-black);
  color: #ffffff;
  letter-spacing: 0.35em;
  text-shadow: 2px 2px 0 var(--accent);
  min-width: 8ch;
  text-align: center;
}
.lobby-share-loading {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.05em;
}
.lobby-copy-confirm {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.85);
  margin: 0;
}
.lobby-copy-confirm.hidden { display: none; }

.lobby-arena-picker {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
}

@keyframes fade-pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

/* =========================================================
   Gameplay screen
   ========================================================= */

#screen-gameplay {
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  padding: 0;
  gap: 0;
  background: var(--bg);
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

#btn-surrender {
  width: auto;
  padding: 0 10px;
  font-family: var(--font);
  font-size: var(--text-sm);
  color: #fff;
}

/* Action bar — horizontal toolbar of utility actions (surrender, settings, etc.)
   Buttons get uniform horizontal breathing room via gap; no individual margins needed. */
.action-bar {
  width: 100%;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 0;
  position: relative;
  z-index: 901;
  flex-shrink: 0;
}


/* =========================================================
   HUD
   ========================================================= */

#hud {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 1200px;
  position: relative;
  z-index: 1;
  padding: 8px 12px 4px;
  gap: 3px;
  flex-shrink: 0;
}

.hud-name-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  width: 100%;
  margin-bottom: 2px;
}

.hud-name {
  font-size: var(--text-md);
  font-weight: var(--weight-heavy);
  color: #ffffff;
  text-transform: uppercase;
  text-shadow: var(--text-layer-shadow);
  letter-spacing: -0.4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}
.hud-name.right { text-align: right; }
#p1-name { text-shadow: 2px 2px 0 var(--p1-mid-dark); }
#p2-name { text-shadow: 2px 2px 0 var(--p2-mid-dark); }

.round-label {
  font-size: var(--text-md);
  font-weight: var(--weight-bold);
  color: #ffffff;
  text-shadow: 2px 2px 0 var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.round-timer {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: #ffffff;
  line-height: 1;
  letter-spacing: -1px;
  text-align: center;
  text-shadow: 3px 3px 0 var(--accent);
  flex-shrink: 0;
}
.round-timer.urgent { color: var(--danger-color); text-shadow: 2px 3px 0 var(--orange); animation: timer-blink 0.5s step-end infinite; }
@keyframes timer-blink { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.hud-bar-row {
  display: flex;
  align-items: stretch;
  width: 100%;
  height: 40px;
}

.ko-block {
  background: var(--accent);
  color: #ffffff;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-black);
  padding: 0 16px;
  letter-spacing: 3px;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

/* Health bar track — danger red revealed as HP drops */
.hud-bar-track {
  flex: 1;
  height: 100%;
  background: var(--danger-color);
  overflow: hidden;
  position: relative;
}
.hud-bar-track.left {
  border-radius: 6px 0 0 6px;
  display: flex;
  justify-content: flex-end;
}
.hud-bar-track.right {
  border-radius: 0 6px 6px 0;
  display: flex;
  justify-content: flex-start;
}

/* Yellow fill, shrinks to reveal danger red as HP drops */
.hud-bar {
  height: 100%;
  background: var(--yellow);
  transition: width 0.35s cubic-bezier(0.4,0,0.2,1), background 0.4s;
  width: 100%;
}
.hud-bar-track.left .hud-bar { border-radius: 6px 0 0 6px; }
.hud-bar-track.right .hud-bar { border-radius: 0 6px 6px 0; }
.hud-bar.mid { background: var(--orange); }
.hud-bar.low { background: var(--yellow); animation: hp-pulse 0.45s step-end infinite; }
@keyframes hp-pulse { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

.hud-sub-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.hud-sub-left { display: flex; align-items: center; gap: 10px; flex: 1; overflow: hidden; }
.hud-sub-right { display: flex; align-items: center; gap: 10px; flex: 1; justify-content: flex-end; overflow: hidden; }

.hud-score {
  font-size: var(--text-md);
  font-weight: var(--weight-bold);
  color: #ffffff;
  text-shadow: var(--text-layer-shadow);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.combo-counter {
  font-size: var(--text-md); font-weight: var(--weight-bold); color: #ffffff;
  white-space: nowrap;
  min-height: 1em; /* reserved space so appearing text never shifts layout */
}

#p1-score, #p1-combo { text-shadow: 2px 2px 0 var(--p1-mid-dark); }
#p2-score, #p2-combo { text-shadow: 2px 2px 0 var(--p2-mid-dark); }

/* =========================================================
   Arena
   ========================================================= */

#arena {
  display: grid;
  grid-template-columns: 1fr 300px 1fr;
  position: relative;
  z-index: 1;
  gap: 8px;
  margin-top: clamp(12px, calc((100vh - 600px) * 0.3), 120px);
  width: 100%;
  max-width: 1200px;
  flex: 1;
  align-items: flex-start;
  padding: 4px 12px 8px;
  min-height: 0;
}

.player-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* --- Sudoku Grid --- */
.sudoku-grid {
  --_grid-outline-color: var(--grid-box-border);
  --_grid-outline-width: 2px;
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  grid-template-rows: repeat(9, 1fr);
  gap: 0;
  background: transparent;
  border: var(--_grid-outline-width) solid var(--_grid-outline-color);
  border-radius: 0;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 1;
}

.cell {
  aspect-ratio: 1;
  background: rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 19px; font-weight: var(--weight-medium);
  cursor: pointer; user-select: none;
  color: var(--text-primary);
  transition: background 0.1s;
  border-right: 1px solid var(--grid-border);
  border-bottom: 1px solid var(--grid-border);
  position: relative;
}

/* ── Cell background system ─────────────────────────────────────────────────
   Single lever: opacity on a pure-white base.
   • Active  (own grid — all cells, opponent filled): 92% — solid, readable
   • Disabled (opponent empty): 25% — clearly ghosted, signals "not yours"
   Text colour distinguishes given vs player-filled numbers; no bg distinction needed.
   ────────────────────────────────────────────────────────────────────────── */

.sudoku-grid.is-me .cell {
  background: rgba(255,255,255,0.88);
}

.sudoku-grid:not(.is-me) .cell {
  background: rgba(255,255,255,0.25); /* disabled — not the player's puzzle */
}
.sudoku-grid:not(.is-me) .cell.given,
.sudoku-grid:not(.is-me) .cell.opponent-given,
.sudoku-grid:not(.is-me) .cell.correct,
.sudoku-grid:not(.is-me) .cell.opponent-filled {
  background: rgba(255,255,255,0.9); /* active — filled cells match own grid */
}

/* Cell text wrapper — always above pseudo-elements */
.cell > span { position: relative; z-index: 1; }

.cell.given          { color: var(--text-secondary); font-weight: 700; cursor: pointer; }
.cell.readonly       { cursor: default; }
.cell.opponent-given { color: var(--text-secondary); font-weight: 700; cursor: default; }

/* --- Danger state — text + diagonal X only (background set per-grid below) --- */
.cell.danger {
  color: var(--danger-dark);
  font-weight: 600;
}
.cell.danger::before,
.cell.danger::after {
  content: '';
  position: absolute;
  /* Inset ~18% from each edge so the X doesn't reach the corners */
  inset: 18%;
  pointer-events: none;
  z-index: 0;
  /* A thin bar rotated to form each diagonal */
  width: auto; height: 1.5px;
  top: 50%; left: 18%; right: 18%;
  border-radius: 2px;
  background: var(--danger-color);
}
.cell.danger::before {
  transform: translateY(-50%) rotate(45deg);
  transform-origin: center;
}
.cell.danger::after {
  transform: translateY(-50%) rotate(-45deg);
  transform-origin: center;
}

/* --- P1 grid — set inherited colour tokens, then cell rules --- */
#p1-grid {
  --completion-flash-color: var(--p1-color);
  --wipe-color: var(--p1-bg-mid);
}
#p1-grid .cell.correct,
#p1-grid .cell.opponent-filled  { color: var(--p1-dark); font-weight: 600; }
#p1-grid .cell.highlight        { background: var(--p1-bg-light); }
#p1-grid .cell.same-number      { background: var(--p1-bg-mid); }

/* --- P2 grid — set inherited colour tokens, then cell rules --- */
#p2-grid {
  --completion-flash-color: var(--p2-color);
  --wipe-color: var(--p2-bg-mid);
}
#p2-grid .cell.correct,
#p2-grid .cell.opponent-filled  { color: var(--p2-dark); font-weight: 600; }
#p2-grid .cell.highlight        { background: var(--p2-bg-light); }
#p2-grid .cell.same-number      { background: var(--p2-bg-mid); }

/* Selected — inset border shows cursor position */
#p1-grid .cell.selected         { background: var(--p1-bg-light); box-shadow: inset 0 0 0 2px var(--p1-color); }
#p2-grid .cell.selected         { background: var(--p2-bg-light); box-shadow: inset 0 0 0 2px var(--p2-color); }

/* Danger background — declared last so it beats highlight, same-number, and selected */
#p1-grid .cell.danger,
#p2-grid .cell.danger           { background: var(--danger-bg-light); }

/* Opponent cursor (uses !important so it wins regardless of order) */
#p1-grid .cell.opponent-cursor  { outline: 3px solid var(--p1-color); outline-offset: -3px; background-color: var(--p1-bg-light) !important; }
#p2-grid .cell.opponent-cursor  { outline: 3px solid var(--p2-color); outline-offset: -3px; background-color: var(--p2-bg-light) !important; }

/* Box dividers */
.cell.box-top        { border-top:    2px solid var(--grid-box-border); }
.cell.box-left       { border-left:   2px solid var(--grid-box-border); }
.cell.pre-box-right  { border-right:  none; }
.cell.pre-box-bottom { border-bottom: none; }
.sudoku-grid .cell:nth-child(9n)        { border-right:  none; }
.sudoku-grid .cell:nth-last-child(-n+9) { border-bottom: none; }

.cell.wiping { animation: cell-wipe 0.4s ease-out forwards; }
@keyframes cell-wipe {
  0%  { background: var(--surface); }
  30% { background: var(--wipe-color); }
  100%{ background: var(--surface); }
}

/* Completion ripple flash — colour inherited from grid via --completion-flash-color */
.cell.completion-flash::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--completion-flash-color);
  pointer-events: none;
  animation: completion-flash 350ms ease-in-out forwards;
}
@keyframes completion-flash {
  0%   { opacity: 0; }
  40%  { opacity: 1; }
  60%  { opacity: 1; }
  100% { opacity: 0; }
}
.cell.completion-flash > span {
  animation: flash-text-white 350ms ease-in-out forwards;
}
@keyframes flash-text-white {
  0%   { color: inherit; }
  35%  { color: #ffffff; }
  65%  { color: #ffffff; }
  100% { color: inherit; }
}

/* Floating score pop */
.floating-points {
  position: fixed;
  font-size: 13px;
  font-weight: 800;
  color: var(--accent);
  pointer-events: none;
  transform: translateX(-50%);
  animation: float-up 0.75s ease-out forwards;
  z-index: 500;
  white-space: nowrap;
}
@keyframes float-up {
  0%   { opacity: 1; transform: translateX(-50%) translateY(0)    scale(1.15); }
  20%  { opacity: 1; transform: translateX(-50%) translateY(-6px)  scale(1); }
  100% { opacity: 0; transform: translateX(-50%) translateY(-36px) scale(0.9); }
}

/* --- Sunset fade overlay (arena bg layer that fades out over match duration) --- */
#arena-bg-overlay {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
  opacity: 1;
  pointer-events: none;
  display: none;
}
#arena-bg-overlay.active { display: block; }

/* --- Arena Sun layers (bg_1 El Tropical) --- */
.arena-sun {
  position: absolute;
  width: 520px;
  height: 520px;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 0;
  display: none;
}
.arena-sun.active { display: block; }

/* --- Fight Ground --- */
#fight-ground {
  position: absolute;
  bottom: 0; left: 0;
  width: 100%;
  height: auto;
  z-index: 0;
}

/* --- Palm Trees (arena bg_1 only) --- */
#palm-trees {
  display: none;
  position: absolute;
  bottom: 9vw;
  left: 0;
  width: 100%;
  height: auto;
  z-index: 1;
}

/* --- Buildings (arena bg_3 only) --- */
#buildings {
  display: none;
  position: absolute;
  bottom: 9vw;
  left: 0;
  width: 100%;
  height: auto;
  z-index: 1;
}

/* --- Fight Stage --- */
#fight-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  height: 100%;
  position: relative;
  z-index: 10;
  padding-bottom: 16px;
}

.fight-characters {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  width: 100%;
  gap: 0;
}

.character-wrap {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  position: relative;
  z-index: 1;
}
.character-wrap:first-child { margin-right: -25px; }
.character-wrap:last-child  { margin-left:  -25px; }
.character-wrap.flipped { transform: scaleX(-1); }
.character-wrap.attacking { z-index: 3; }

.character-sprite { width: 150px; height: 150px; image-rendering: pixelated; }

/* Attack flash */
.attack-flash { position: fixed; inset: 0; pointer-events: none; z-index: 100; }
.attack-flash.hidden { display: none; }
.attack-flash.punch-flash { animation: punch-flash 0.25s ease-out forwards; }
.attack-flash.heavy-flash { animation: heavy-flash 0.35s ease-out forwards; }
.attack-flash.self-flash  { animation: self-flash  0.2s  ease-out forwards; }

@keyframes punch-flash {
  0%   { box-shadow: inset 0 0 80px rgba(240,0,19,0.22); }
  100% { box-shadow: none; }
}
@keyframes heavy-flash {
  0%   { box-shadow: inset 0 0 120px rgba(255,139,22,0.32); }
  60%  { box-shadow: inset 0 0 60px rgba(240,0,19,0.18); }
  100% { box-shadow: none; }
}
@keyframes self-flash {
  0%   { box-shadow: inset 0 0 60px rgba(240,0,19,0.2); }
  100% { box-shadow: none; }
}

/* =========================================================
   Game overlay (Round X / FIGHT! / KO / VICTORY)
   ========================================================= */

.game-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: none;
  z-index: 200;
  pointer-events: none;
}
.game-overlay.hidden { display: none; }
.overlay-btn-row { display: flex; gap: 16px; margin-top: 12px; pointer-events: all; }
.overlay-btn-row.hidden { display: none; }
.btn-leave { background: var(--danger-color); box-shadow: 4px 4px 0 #ffffff; }
.btn-leave:hover { background: var(--danger-dark); transform: translate(-1px, -2px); box-shadow: 5px 6px 0 #ffffff; }

.overlay-main {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: var(--weight-black);
  color: var(--accent);
  letter-spacing: 0;
  line-height: 1;
  text-align: center;
  animation: pop-in 0.35s cubic-bezier(0.34,1.56,0.64,1);
  text-shadow: 4px 5px 0 #ffffff;
}

.overlay-sub {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: #ffffff;
  letter-spacing: -0.3px;
  text-shadow: 1px 2px 0 var(--accent);
}

@keyframes pop-in {
  from { transform: scale(0.55); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

/* =========================================================
   Match End
   ========================================================= */

#screen-match-end {
  background: var(--surface);
  background-size: cover;
  background-position: center;
}
.match-end-bg { display: none; }
.match-end-content { display: flex; flex-direction: column; align-items: center; gap: 16px; z-index: 1; }
.match-end-title {
  font-family: var(--font-display); font-size: var(--text-3xl); font-weight: var(--weight-black); color: var(--accent); letter-spacing: 0;
  animation: pop-in 0.4s cubic-bezier(0.34,1.56,0.64,1);
  text-shadow: 0 2px 0 rgba(255,255,255,0.7), 2px 4px 12px rgba(0,0,0,0.15);
}
.match-end-title.defeat { color: var(--danger-color); }
.match-winner-name { font-size: var(--text-xl); font-weight: var(--weight-heavy); color: var(--accent); letter-spacing: -0.5px;
  text-shadow: 0 1px 0 rgba(255,255,255,0.8), 1px 2px 6px rgba(0,0,0,0.12); }
.match-winner-char img { width: 120px; height: 120px; object-fit: cover; object-position: 50% 12%; border-radius: 12px; image-rendering: pixelated; }

/* =========================================================
   Number pad — hidden by default, shown for coarse-pointer (touch) devices
   ========================================================= */

#mobile-numpad {
  display: none;
}

/* =========================================================
   Mobile
   ========================================================= */

@media (max-width: 1000px) {
  :root {
    --text-xl:  18px;  /* timer + share code (was 26px) */
    --text-3xl: 44px;  /* match-end title (was 66px) */
    --text-4xl: 56px;  /* main overlay: FIGHT! KO VICTORY (was 96px) */
  }

  /* Lobby — hide READY/WAITING pill on narrow screens */
  .lobby-status { display: none; }

  /* Character select — mobile layout */

  /* Background stays on screen; only inner wrapper scrolls */
  #screen-character-select {
    justify-content: flex-start;
    align-items: stretch;
    overflow: hidden;
  }
  .char-select-scroll {
    overflow-y: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: calc(var(--header-h) + 20px);
    padding-bottom: 40px;
    width: 100%;
  }

  .start-logo-top,
  .start-logo-bottom { max-width: 200px; }

  #character-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    padding: 0 16px;
    width: 100%;
    max-width: 380px;
  }

  .character-card { width: 100%; }
  .character-card img { width: 100%; height: auto; object-position: 50% 12%; }

  /* Lobby — show only own player */
  .lobby-player:not(.is-me) { display: none; }
  .lobby-vs { display: none; }

  #arena {
    grid-template-columns: 1fr;
    margin-top: 8px;
    flex: 0 0 auto;
  }
  /* HUD — compact on mobile: slim 4px bar, purple center pip instead of KO text */
  #hud { flex-wrap: nowrap; padding: 4px 12px 2px; }
  .hud-score, .combo-counter { font-size: var(--text-sm); }
  .ko-block {
    /* Keep the block but shrink to a narrow purple pip — no text */
    font-size: 0;
    padding: 0;
    width: 6px;
    flex-shrink: 0;
    border-radius: 0;
  }
  .hud-bar-row { height: 4px; }
  .hud-bar-track.left  { border-radius: 2px 0 0 2px; }
  .hud-bar-track.right { border-radius: 0 2px 2px 0; }
  .hud-bar-track.left  .hud-bar { border-radius: 2px 0 0 2px; }
  .hud-bar-track.right .hud-bar { border-radius: 0 2px 2px 0; }

  /* Halve all gaps between the stacked gameplay elements */
  .action-bar { padding: 3px 12px 0; }
  #arena { margin-top: 4px; }
  #mobile-numpad { padding: 1px 12px 4px; }

  /* Hide opponent panel, show only own grid */
  .player-panel { display: none; }
  .player-panel.is-me { display: flex; width: 100%; gap: 0; padding-bottom: 0; }

  /* Fighter stage — slim strip pinned to bottom */
  #fight-stage {
    display: flex;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: 110px;
    padding-bottom: 0;
    z-index: 2;
    pointer-events: none;
    overflow: visible;
  }

  /* Ground anchors inside the fixed fight-stage on mobile */
  #fight-ground {
    position: absolute;
    bottom: 0; left: 0;
    width: 100%;
    height: auto;
    z-index: 0;
  }

  /* Sprites flush to the stage bottom — no extra breathing room */
  #fight-stage .fight-characters { align-items: flex-end; padding-bottom: 0; }

}

/* =========================================================
   Touch input — numpad (coarse pointer = no physical keyboard assumed)
   ========================================================= */

@media (pointer: coarse) {
  #mobile-numpad {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 4px;
    width: 100%;
    max-width: 480px;
    padding: 2px 12px 8px;
    margin-top: 0;
    flex-shrink: 0;
    position: relative;
    z-index: 10;
  }

  .numpad-btn {
    font-family: var(--font);
    font-size: 19px;
    font-weight: var(--weight-bold);
    background: rgba(255,255,255,0.85);
    border: 2px solid rgba(0,0,0,0.15);
    border-radius: 6px;
    color: var(--text-primary);
    height: 44px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.1s, transform 0.08s;
    text-shadow: none;
    user-select: none;
    touch-action: manipulation;
  }

  .numpad-btn:active {
    background: rgba(255,255,255,1);
    transform: scale(0.93);
  }

  .numpad-clear {
    color: var(--text-primary); /* same as number text — no alarming red */
  }
}

.hidden { display: none !important; }