/* ===========================================================
   Full-Screen Layout + Compact Sizing + Small Scroll Margin
   =========================================================== */

:root {
  --bg1: #0e1025;
  --bg2: #111a36;
  --card: #0b1024;
  --muted: #a9b1d6;
  --text: #eef1ff;
  --accent: #8aa3ff;
  --accent2: #b289ff;
  --ok: #2ecc71;
  --warn: #ffbe55;
  --bad: #ff6b6b;
  --glass: rgba(255, 255, 255, 0.06);
  --glass2: rgba(255, 255, 255, 0.12);
  --radius: 16px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

/* === Allow page scroll, but only small === */
* {
  box-sizing: border-box;
}
html,
body {
  min-height: 100vh;
  overflow-y: auto;
}

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(
      1200px circle at 20% -10%,
      #22317a55,
      transparent 60%
    ),
    radial-gradient(1200px circle at 80% 110%, #7b3cf055, transparent 60%),
    linear-gradient(160deg, var(--bg1), var(--bg2));
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter,
    "Helvetica Neue", Arial;

  display: grid;
  grid-template-rows: auto auto 1fr auto; /* header, main, footer */
  min-height: 100vh;
}

/* ===== Header / Shell ===== */
.wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 12px;
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 10px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand {
  display: flex;
  gap: 6px;
  align-items: center;
}
.logo {
  width: 50px;
  height: 50px;
}
.logo-img {
  width: 100%;
  height: 100%;
  border-radius: 12px;
  object-fit: cover;
}
h1 {
  font-size: clamp(18px, 2.2vw, 24px);
  margin: 0 0 2px 0;
  font-weight: 800;
}
.sub {
  color: var(--muted);
  font-size: 13px;
}

.btn-container {
  display: flex;
  justify-content: space-between; /* pushes first group left, last group right */
  align-items: center;           /* vertically center buttons */
  gap: 8px;                      /* optional spacing */
}

.btn-container > div {
  display: flex;
  gap: 6px; /* space between hint & reset */
}

/* .btn base consolidated below */

.btn-enlarge {
  font-size: 16px;
}

.long-btn {
  padding: 8px 20px;
}

.chip {
  background: #0f1740;
  color: var(--muted);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 6px 10px;
  border-radius: 12px;
  font-size: 12px;
  display: none;
}
.btn {
  appearance: none;
  border: 0;
  cursor: pointer;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--glass);
  color: var(--text);
  backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), var(--shadow);
  font-weight: 700;
  transition: transform 0.08s ease, background 0.2s ease;
}
.btn:hover {
  transform: translateY(-1px);
  background: var(--glass2);
}
.btn:active {
  transform: translateY(0);
}
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #0b0f1f;
  box-shadow: 0 10px 30px rgba(138, 163, 255, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
}
.btn.ghost {
  background: transparent;
  border: 1px dashed rgba(255, 255, 255, 0.18);
}

/* ===== Main Grid ===== */
.grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1.1fr 0.9fr;
  margin: 0;
}
@media (max-width: 1024px) {
  .grid {
    grid-template-columns: 1fr;
  }
  .actions-container {
    right: 12px;
  }
}

.card {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.07),
    rgba(255, 255, 255, 0.02)
  );
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.right-card {
    /* justify-content: center; */
  align-items: center;
}

.right-card h3 {
  margin:24px 0 16px 0;

}

/* ===== Play area ===== */
.playarea {
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 10px;
}
.boardWrap {
  display: grid;
  place-items: center;
}

/* Resize board smaller so tray fits too */
.board {
  width: min(62vmin, 90vw);
  aspect-ratio: 1/1;
  display: grid;
  gap: 2px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 14px;
  overflow: hidden;
}
.cell {
  position: relative;
  background: #0c1229;
  border-radius: 8px;
  border: 1px dashed rgba(255, 255, 255, 0.14);
}
.cell.correct {
  /* border: 1px solid rgba(124, 156, 255, 0.55); */
  /* background: rgba(46, 204, 113, 0.25);
  box-shadow: inset 0 0 0 2px rgba(46, 204, 113, 0.75), 0 0 18px rgba(46, 204, 113, 0.35); */
}

.hintOverlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background-position: center;
  background-size: cover;
  border-radius: 14px;
  transition: opacity 0.2s ease;
}
.hintOverlay.show {
  opacity: 0.35;
}

/* Tray below board, scrolls internally if overflow */
.tray {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
  grid-auto-rows: 56px;
  align-content: start;
  overflow: auto;
  max-height: 200px; /* ensures it won’t eat the whole screen */
  padding-right: 4px;
}
.tray .piece {
  width: 100%;
  height: 100%;
}

/* Tray placeholders so tray never looks collapsed */
.tray.empty::before {
  content: "";
  display: block;
  grid-column: 1 / -1;  /* span full row */
  height: 52px;
  border: 2px dashed rgba(255, 255, 255, 0.18);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
}


.board .cell .piece {
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 0;
  box-shadow: none;
  background-size: cover;
  background-position: center;
}

.piece {
  height: 56px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background-position: center;
  background-size: cover;
  cursor: grab;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.piece:active {
  cursor: grabbing;
}
.piece.placed {
  cursor: default;
  opacity: 0.8;
  filter: saturate(120%);
}

/* ===== Sidebar ===== */
.ref {
  display: grid;
  gap: 10px;
}
.refimg {
  aspect-ratio: 1/1;
  width: 80%;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background-position: center;
  background-size: cover;
  margin: 0 0 16px;
}

/* ===== Footer ===== */
footer {
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  padding: 12px;
  margin-top: 20px;
}

.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(8, 10, 20, 0.6);
  backdrop-filter: blur(6px);
  display: none; 
  align-items: center;
  justify-content: center;
  z-index: 60;
  justify-items: center;

}

.modal {
  background: linear-gradient(120deg, #1a2150 60%, #3a2e5f 100%) rgba(8, 10, 20, 0.7);
  backdrop-filter: blur(12px) brightness(0.9);
  padding: 40px 48px 48px;
  /* border-radius: 36px; */

  border-radius: 18px;
  /* background: linear-gradient(180deg, rgba(255,255,255,0.07), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.12); */
  
  box-shadow: var(--shadow);
  animation: sheetIn 180ms ease-out;
}

.win-title {
  margin-top: 0;
}

/* ===== Stats / Toast line ===== */
.stats {
  margin: 8px 0 0;
  min-height: 22px; /* reserve space so layout doesn’t jump */
  position: relative;
}

/* Default message */
.stats-msg {
  display: inline-block;
  font-size: 14px;
  color: var(--muted);
}

/* Toast in same place, hidden by default */
.toast {
  display: none;
  position: absolute;
  left: 0;
  top: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--warn);
  background: rgba(255, 190, 85, 0.1);
  border: 1px solid var(--warn);
  padding: 4px 8px;
  border-radius: 6px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}
#toast.show {
  display: inline-block;
  animation: toastFade 0.18s ease-out;
}

@keyframes toastFade {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Generic helper */
.hidden { display: none; }

/* anchor buttons already inherit color from .btn */

a {
  text-decoration: none;
  color: var(--muted);
}


/* ===== Flash Correct Cell ===== */

.cell.flash-correct::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 8px;
  background: rgba(46, 204, 113, 0.25);
  box-shadow: inset 0 0 0 2px rgba(46, 204, 113, 0.75), 0 0 18px rgba(46, 204, 113, 0.35);
  pointer-events: none;
  animation: cellFlashFade 10s ease-out forwards;
}

@keyframes cellFlashFade {
  from { opacity: 1; }
  to   { opacity: 0; }
}

/* ===== Help FAB & Sheet ===== */
.fab {
  position: fixed;
  right: 16px;
  bottom: 16px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 0;
  background: var(--glass);
  color: var(--text);
  font-weight: 800;
  font-size: 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  cursor: pointer;
  z-index: 70;
  transition: transform 0.08s ease, background 0.2s ease;
}
.fab:hover { transform: translateY(-1px); background: var(--glass2); }
.fab:active { transform: translateY(0); }

/* Backdrop */
.help-sheet {
  position: fixed;
  inset: 0;
  display: none;
  background: rgba(8, 10, 20, 0.55);
  backdrop-filter: blur(4px);
  z-index: 65;
}
.help-sheet.show { display: block; }

/* Panel */
.help-sheet__panel {
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: min(520px, 92vw);
  max-height: 85vh;
  overflow: auto;
  padding: 20px 20px 22px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255,255,255,0.07), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: var(--shadow);
  animation: sheetIn 180ms ease-out;
}
@keyframes sheetIn {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}

.help-title {
  margin: 0 0 8px 0;
}
.help-content {
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}
.help-content ul {
  margin: 8px 0 0;
  padding-left: 18px;
}
.help-content li { margin: 6px 0; }

/* Close (×) */
.help-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 0;
  background: var(--glass);
  color: var(--text);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
}
.help-close:hover { background: var(--glass2); }