/* ============================================================
   糖果消消樂 — pink candy theme, iPad-first, senior-friendly
   ============================================================ */

:root {
  --bg: #fff0f5;
  --bg2: #ffe0ed;
  --card: #ffffff;
  --text: #4a2a3c;
  --text-light: #a07989;
  --accent: #ff6aa8;
  --accent-dark: #e04d8c;
  --accent-light: #ffd4e5;
  --border: #ffb9d4;
  --border-thick: #ff8ab5;
  --board-bg: #b8c6d6;
  --cell-bg: #d8e1ec;
  --cell-border: #9eb0c6;
  --shadow: 0 4px 20px rgba(230, 80, 140, 0.15);
  --shadow-btn: 0 3px 10px rgba(230, 80, 140, 0.20);
  --radius: 20px;

  /* sizing tokens */
  --title-font: 28px;
  --stat-label-font: 14px;
  --stat-value-font: 28px;
  --text-btn-font: 18px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  user-select: none;
}

html, body {
  height: 100%;
  height: 100dvh;
  overflow: hidden;
}

body {
  font-family: -apple-system, 'PingFang TC', 'Noto Sans TC', 'Helvetica Neue', sans-serif;
  background: linear-gradient(135deg, var(--bg) 0%, var(--bg2) 100%);
  color: var(--text);
}

.app {
  width: 100%;
  height: 100%;
  height: 100dvh;
  max-width: 900px;
  margin: 0 auto;
  padding: 14px 16px;
  padding-top: calc(14px + env(safe-area-inset-top, 0px));
  padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* --- Header --- */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.title {
  font-size: var(--title-font);
  font-weight: 800;
  color: var(--accent-dark);
  letter-spacing: 4px;
}

.help-btn, .back-btn, .icon-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--card);
  color: var(--accent);
  font-size: 22px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  flex-shrink: 0;
  padding: 0;
}
.help-btn:active, .back-btn:active, .icon-btn:active {
  background: var(--accent-light);
  border-color: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Toggle which speaker icon is visible based on mute state */
.icon-btn .icon-on  { display: inline; }
.icon-btn .icon-off { display: none; }
.icon-btn.muted .icon-on  { display: none; }
.icon-btn.muted .icon-off { display: inline; }
.icon-btn.muted { color: var(--text-light); }

/* --- Status bar --- */

.status-bar {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 10px;
  background: var(--card);
  border: 3px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  box-shadow: var(--shadow);
  flex-shrink: 0;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 72px;
}

.stat-label {
  font-size: var(--stat-label-font);
  color: var(--text-light);
  letter-spacing: 2px;
  font-weight: 600;
}

.stat-value {
  font-size: var(--stat-value-font);
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}

.stat-value.accent { color: var(--accent-dark); }

/* The target stat is a button — dashed outline hints it's tappable */
.stat-btn {
  border: 2px dashed var(--border);
  background: var(--accent-light);
  border-radius: 14px;
  padding: 6px 14px;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s;
  font-family: inherit;
  color: inherit;
}
.stat-btn:active {
  transform: scale(0.96);
  background: var(--border);
}

/* --- Board --- */

.board-wrap {
  flex: 1 1 0;
  min-height: 0;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.board {
  position: relative;
  /* explicit width/height set by JS fitBoard() so the square always fits */
  width: 0;
  height: 0;
  background: var(--board-bg);
  border: 5px solid var(--border-thick);
  border-radius: var(--radius);
  box-shadow: var(--shadow), inset 0 3px 8px rgba(0,0,0,0.15);
  overflow: hidden;
  box-sizing: border-box;
  touch-action: none;
}

.cell {
  position: absolute;
  width: 12.5%;
  height: 12.5%;
  box-sizing: border-box;
}

.cell::before {
  content: '';
  position: absolute;
  inset: 4px;
  background: var(--cell-bg);
  border-radius: 7px;
  border: 1px solid var(--cell-border);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.12);
}

.candy {
  position: absolute;
  width: 12.5%;
  height: 12.5%;
  padding: 6px;
  box-sizing: border-box;
  /* top/left set by JS */
  transition:
    left 0.28s cubic-bezier(.2,.9,.3,1.2),
    top 0.28s cubic-bezier(.2,.9,.3,1.2),
    transform 0.22s ease,
    opacity 0.22s ease;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.candy > svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 2px 3px rgba(0,0,0,0.25));
  pointer-events: none;
}

.candy.selected {
  z-index: 3;
  animation: candy-bounce 0.75s ease-in-out infinite;
}

.candy.selected > svg {
  filter:
    drop-shadow(0 0 14px #ffffff)
    drop-shadow(0 0 10px var(--accent))
    drop-shadow(0 2px 6px rgba(230, 80, 140, 0.9));
}

/* Pulsing halo behind the selected candy — unmistakable from across the room */
.candy.selected::before {
  content: '';
  position: absolute;
  inset: -10%;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.70) 0%,
    rgba(255, 106, 168, 0.55) 38%,
    rgba(255, 106, 168, 0.00) 70%
  );
  animation: halo-pulse 0.75s ease-in-out infinite;
  z-index: -1;
  pointer-events: none;
}

.candy.clearing {
  transform: scale(1.25);
  opacity: 0;
  z-index: 2;
}

.candy.falling {
  /* no-op marker for debugging */
}

.candy.new {
  opacity: 0;
  transform: scale(0.3);
}

@keyframes candy-bounce {
  0%, 100% { transform: scale(1.00) rotate(0deg); }
  25%      { transform: scale(1.22) rotate(-5deg); }
  50%      { transform: scale(1.10) rotate(0deg); }
  75%      { transform: scale(1.22) rotate(5deg); }
}

@keyframes halo-pulse {
  0%, 100% { transform: scale(0.85); opacity: 0.55; }
  50%      { transform: scale(1.30) rotate(180deg); opacity: 1.00; }
}

.cell.hint {
  animation: hint-glow 0.9s ease-in-out 3;
}

@keyframes hint-glow {
  0%, 100% { background: transparent; }
  50%      { background: rgba(255, 255, 255, 0.35); }
}

.cell.hint::before {
  box-shadow:
    inset 0 2px 4px rgba(0,0,0,0.1),
    0 0 0 3px var(--accent);
}

/* --- Actions --- */

.actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

.text-btn {
  flex: 1;
  padding: 14px 0;
  border: 2px solid var(--border);
  border-radius: 16px;
  background: var(--card);
  color: var(--accent-dark);
  font-size: var(--text-btn-font);
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 2px;
  transition: all 0.15s;
  box-shadow: var(--shadow-btn);
}

.text-btn:active {
  transform: scale(0.96);
  background: var(--accent-light);
}

.text-btn.primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.text-btn.primary:active {
  background: var(--accent-dark);
}

/* --- Modal --- */

.primary-btn {
  padding: 14px 36px;
  border: none;
  border-radius: 28px;
  background: var(--accent);
  color: white;
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 3px;
  box-shadow: 0 4px 14px rgba(230, 80, 140, 0.35);
}
.primary-btn:active {
  transform: scale(0.96);
  background: var(--accent-dark);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(74, 42, 60, 0.45);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 100;
}

.modal-overlay.show {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--card);
  border-radius: 28px;
  padding: 36px;
  text-align: center;
  max-width: 480px;
  width: 88%;
  box-shadow: 0 10px 40px rgba(230, 80, 140, 0.25);
  border: 3px solid var(--border);
}

.modal h2 {
  font-size: 30px;
  margin-bottom: 12px;
  color: var(--accent-dark);
}

.end-sub {
  color: var(--text-light);
  font-size: 18px;
  margin-bottom: 20px;
}

.end-stats {
  display: flex;
  justify-content: center;
  gap: 36px;
  margin-bottom: 24px;
}

.end-stat .label {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 4px;
  letter-spacing: 1px;
}

.end-stat .value {
  font-size: 34px;
  font-weight: 800;
  color: var(--accent);
}

/* Target picker */
.target-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 18px;
}

.target-option {
  padding: 18px 12px;
  border: 3px solid var(--border);
  border-radius: 18px;
  background: var(--card);
  color: var(--text);
  font-family: inherit;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: all 0.15s;
  box-shadow: var(--shadow-btn);
}

.target-option:active {
  transform: scale(0.96);
  background: var(--accent-light);
}

.target-option.current {
  border-color: var(--accent);
  background: var(--accent-light);
  box-shadow: 0 0 0 3px rgba(255, 106, 168, 0.25), var(--shadow-btn);
}

.target-option .opt-label {
  font-size: 16px;
  color: var(--text-light);
  letter-spacing: 4px;
  font-weight: 600;
}

.target-option .opt-value {
  font-size: 32px;
  color: var(--accent-dark);
  font-weight: 800;
  line-height: 1;
}

.help-content {
  text-align: left;
  max-height: 60vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 20px;
}

.help-content h3 {
  font-size: 21px;
  margin: 18px 0 10px;
  color: var(--accent);
}
.help-content h3:first-child { margin-top: 0; }

.help-content p,
.help-content li {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text);
}

.help-content ul {
  padding-left: 22px;
  margin-bottom: 14px;
}

/* =============================================================
   TABLET PORTRAIT
   ============================================================= */

@media (min-width: 748px) and (orientation: portrait) {
  :root {
    --title-font: 38px;
    --stat-label-font: 18px;
    --stat-value-font: 36px;
    --text-btn-font: 22px;
  }

  /* Trim padding / gap so the board can be as big as possible */
  .app {
    max-width: none;
    padding: 12px 14px;
    padding-top: calc(12px + env(safe-area-inset-top, 0px));
    padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    gap: 10px;
  }
  .title { letter-spacing: 6px; }
  .help-btn, .back-btn, .icon-btn { width: 56px; height: 56px; font-size: 26px; }

  .status-bar { padding: 10px 18px; }
  .stat { min-width: 92px; }
  .stat-btn { padding: 8px 18px; }

  .board { border-width: 6px; }
  .text-btn { padding: 14px 0; border-radius: 18px; }

  .target-option { padding: 22px 14px; }
  .target-option .opt-label { font-size: 22px; letter-spacing: 6px; }
  .target-option .opt-value { font-size: 44px; }
  .target-options { gap: 16px; margin-bottom: 22px; }
}

/* =============================================================
   LARGE TABLET PORTRAIT
   ============================================================= */

@media (min-width: 1024px) and (orientation: portrait) {
  :root {
    --title-font: 46px;
    --stat-label-font: 22px;
    --stat-value-font: 46px;
    --text-btn-font: 26px;
  }
  .app { padding: 14px 20px; gap: 12px; }
  .status-bar { padding: 14px 22px; }
}

/* =============================================================
   TABLET LANDSCAPE
   ============================================================= */

@media (min-width: 700px) and (orientation: landscape) {
  :root {
    --title-font: 28px;
    --stat-label-font: 15px;
    --stat-value-font: 28px;
    --text-btn-font: 18px;
  }

  /* Left sidebar holds stats + actions so the board gets the full
     remaining height on both grid rows */
  .app {
    display: grid;
    max-width: none;
    grid-template-columns: 220px 1fr;
    grid-template-rows: auto 1fr auto;
    gap: 10px 16px;
    padding: 10px 14px;
    padding-left: calc(14px + env(safe-area-inset-left, 0px));
    padding-right: calc(14px + env(safe-area-inset-right, 0px));
    padding-top: calc(10px + env(safe-area-inset-top, 0px));
    padding-bottom: calc(10px + env(safe-area-inset-bottom, 0px));
  }

  .header { grid-column: 1 / -1; grid-row: 1; }

  .status-bar {
    grid-column: 1;
    grid-row: 2;
    flex-direction: column;
    padding: 14px 16px;
    gap: 14px;
    align-self: start;
  }

  .stat { width: 100%; min-width: 0; }

  .board-wrap {
    grid-column: 2;
    grid-row: 2 / 4;
  }

  .actions {
    grid-column: 1;
    grid-row: 3;
    flex-direction: column;
    align-self: end;
  }
}

/* small phones */
@media (max-width: 380px) {
  :root {
    --title-font: 22px;
    --stat-label-font: 11px;
    --stat-value-font: 22px;
    --text-btn-font: 14px;
  }
  .app { padding: 10px 12px; gap: 8px; }
  .title { letter-spacing: 2px; }
  .stat { min-width: 56px; }
}