/* tic-tac-toe: unify visuals with common.css (keep DOM structure & game mechanics intact) */

:root {
  /* Bring game marks onto the shared palette */
  --ttt-mark-x: var(--primary-color);
  --ttt-mark-o: var(--text-primary);
  --ttt-surface: #fff;
  --ttt-surface-muted: #f7f9fc;
  --ttt-shadow: rgba(0, 0, 0, 0.08);
  --ttt-shadow-2: rgba(0, 0, 0, 0.06);
  --ttt-radius: 14px;
  --ttt-radius-2: 10px;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  color: var(--text-primary);
  background:
    radial-gradient(900px 600px at 18% 0%, rgba(33, 150, 243, 0.12) 0%, rgba(33, 150, 243, 0) 70%),
    radial-gradient(900px 650px at 90% 10%, rgba(0, 150, 136, 0.10) 0%, rgba(0, 150, 136, 0) 70%),
    linear-gradient(180deg, #fff 0%, #f6f8fb 65%, #f0f4f9 100%);
}

/* Use the shared container sizing but keep the app class for compatibility */
.app {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid var(--border-color);
  border-radius: var(--ttt-radius);
  background: var(--ttt-surface);
  box-shadow: 0 10px 24px var(--ttt-shadow);
}

header .title {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

header h1 {
  margin: 0;
  font-size: 18px;
  letter-spacing: 0.2px;
  font-weight: 700;
}

header .subtitle {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.3;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background: var(--ttt-surface-muted);
  color: var(--text-secondary);
  font-size: 12px;
}

.pill strong {
  color: var(--text-primary);
}

.screen {
  display: none;
  border: 1px solid var(--border-color);
  border-radius: var(--ttt-radius);
  background: var(--ttt-surface);
  box-shadow: 0 12px 28px var(--ttt-shadow);
  overflow: hidden;
}

.screen.active {
  display: block;
}

.screen .content {
  padding: var(--spacing-lg);
}

.row {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  align-items: center;
}

.card {
  background: var(--ttt-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--ttt-radius-2);
  padding: var(--spacing-md);
  box-shadow: 0 10px 22px var(--ttt-shadow-2);
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
}

input[type="number"] {
  width: 180px;
  padding: 10px 10px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: #ffffff;
  color: var(--text-primary);
  outline: none;
  box-shadow: 0 6px 14px var(--ttt-shadow-2);
}

input[type="number"]:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.15), 0 8px 18px var(--ttt-shadow-2);
}

.hint {
  margin-top: 10px;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.35;
}

.buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  align-items: center;
}

.buttons.center {
  justify-content: center;
}

/* Adapt common .btn for "ghost" and "primary" variants used in markup */
.btn.ghost {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  box-shadow: none;
}

.btn.ghost:hover {
  background: rgba(33, 150, 243, 0.08);
}

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

.btn.primary:hover {
  background: var(--primary-dark);
}

.btn.cta {
  padding: 14px 18px;
  font-size: 15px;
  border-radius: 14px;
  min-width: 220px;
}

    .settingsStack{
      display:flex;
      flex-direction: column;
      gap: 12px;
      max-width: 760px;
      margin: 0 auto;
    }
    .settingsCard{
      max-width: 680px;
      margin: 0 auto;
    }
    .modeRow{
      display:flex;
      align-items:center;
      justify-content: center;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 10px;
    }
    .modeRow .label{
      color: var(--text-secondary);
      font-size: 12px;
      font-weight: 650;
    }
    .segmented{
      display:flex;
      gap: 8px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .segmented button{
      border-radius: 999px;
      padding: 9px 12px;
    }
    .segmented button.active{
      background: rgba(33, 150, 243, 0.12);
      border-color: rgba(33, 150, 243, 0.35);
      box-shadow: 0 10px 18px var(--ttt-shadow-2);
    }

    .steppers{
      display:flex;
      gap: 14px;
      flex-wrap: wrap;
      align-items: flex-end;
      justify-content: center;
      margin-top: 2px;
    }
    .stepper{
      width: 150px;
      padding: 12px 10px;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      background: var(--ttt-surface);
      box-shadow: 0 10px 22px var(--ttt-shadow-2);
      display:flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      user-select: none;
    }
    .stepper .value{
      font-size: 22px;
      font-weight: 850;
      letter-spacing: .2px;
      line-height: 1;
      padding: 4px 0;
    }
    .stepper .lbl{
      font-size: 12px;
      color: var(--text-secondary);
      line-height: 1.1;
      text-align: center;
    }
    .stepperBtn{
      width: 40px;
      height: 40px;
      padding: 0;
      border-radius: 12px;
      display:flex;
      align-items:center;
      justify-content:center;
      font-size: 18px;
      font-weight: 800;
      line-height: 1;
    }
    .stepperBtn:disabled{
      opacity: .45;
      cursor: not-allowed;
      box-shadow: none;
    }

    .statusbar{
      display:flex;
      gap: 12px;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 12px;
    }

    .status{
      display:flex;
      flex-direction:column;
      gap: 4px;
    }
    .status .line1{
      font-size: 13px;
      color: var(--text-secondary);
    }
    .status .line2{
      font-size: 14px;
      font-weight: 650;
    }

    .boardWrap{
      border: 1px solid var(--border-color);
      border-radius: var(--ttt-radius);
      background: var(--ttt-surface);
      overflow: auto;
      max-height: calc(100vh - 240px);
      padding: 12px;
      box-shadow: 0 12px 28px var(--ttt-shadow-2);
      display: flex;
      justify-content: center;
      align-items: flex-start;
    }

    .board{
      display:grid;
      gap: 6px;
      grid-auto-rows: 42px;
      /* columns set dynamically */
      width: max-content;
      margin: 0 auto;
    }

    .cell{
      width: 42px;
      height: 42px;
      display:flex;
      align-items:center;
      justify-content:center;
      font-size: 18px;
      font-weight: 800;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      background: linear-gradient(180deg, #fff, var(--ttt-surface-muted));
      color: var(--text-primary);
      cursor: pointer;
      user-select:none;
      box-shadow: 0 10px 18px var(--ttt-shadow-2);
      transition: background .12s ease, border-color .12s ease, transform .05s ease, box-shadow .12s ease;
    }
    .cell:hover{
      background: rgba(33, 150, 243, 0.06);
      border-color: rgba(33, 150, 243, 0.40);
      box-shadow: 0 14px 24px var(--ttt-shadow-2);
    }
    .cell:active{ transform: translateY(1px); }

    .cell.empty{
      color: rgba(0,0,0,.22);
    }
    .cell.x{
      color: var(--ttt-mark-x);
    }
    .cell.o{
      color: var(--ttt-mark-o);
    }

    .cell.selected{
      outline: 2px solid rgba(33, 150, 243, 0.55);
      outline-offset: 1px;
      background: rgba(33, 150, 243, 0.10);
      border-color: rgba(33, 150, 243, 0.40);
    }

    .cell.swapCandidate{
      outline: 2px dashed rgba(33, 150, 243, 0.45);
      outline-offset: 1px;
      border-color: rgba(33, 150, 243, 0.30);
      background: rgba(33, 150, 243, 0.08);
    }
    .cell.blockedSwap{
      border-color: rgba(33, 150, 243, 0.35);
      background:
        repeating-linear-gradient(135deg, rgba(33, 150, 243, 0.12) 0 8px, rgba(255,255,255,0) 8px 16px),
        linear-gradient(180deg, #fff, var(--ttt-surface-muted));
      box-shadow: 0 10px 18px var(--ttt-shadow-2);
    }

    @keyframes winPulse {
      0%   { box-shadow: 0 10px 18px var(--ttt-shadow-2), 0 0 0 0 rgba(33, 150, 243, 0); }
      50%  { box-shadow: 0 16px 28px var(--ttt-shadow-2), 0 0 0 6px rgba(33, 150, 243, 0.18); }
      100% { box-shadow: 0 10px 18px var(--ttt-shadow-2), 0 0 0 0 rgba(33, 150, 243, 0); }
    }

    .cell.win{
      outline: 3px solid rgba(33, 150, 243, 0.75);
      outline-offset: 1px;
      border-color: rgba(33, 150, 243, 0.55);
      background: rgba(33, 150, 243, 0.14);
      animation: winPulse 900ms ease-in-out infinite;
    }

    .toast{
      margin-top: 10px;
      padding: 10px 12px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      background: var(--ttt-surface-muted);
      color: var(--text-secondary);
      font-size: 12px;
      line-height: 1.35;
      box-shadow: 0 10px 22px var(--ttt-shadow-2);
    }
    .toast.good{ border-color: rgba(0, 150, 136, 0.45); color: var(--text-primary); }
    .toast.warn{ border-color: rgba(255, 143, 0, 0.55); color: var(--text-primary); }
    .toast.bad{  border-color: rgba(244, 67, 54, 0.55); color: var(--text-primary); }

    .resultsGrid{
      display:grid;
      grid-template-columns: 1fr;
      gap: 10px;
      margin-top: 12px;
    }

    .kv{
      display:flex;
      justify-content:space-between;
      gap: 10px;
      padding: 10px 12px;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      background: var(--ttt-surface-muted);
      font-size: 13px;
      box-shadow: 0 10px 22px var(--ttt-shadow-2);
    }
    .kv span:first-child{ color: var(--text-secondary); }
    .kv span:last-child{ font-weight: 700; }

    .footer-note{
      margin-top:auto;
      color: var(--text-secondary);
      font-size: 11px;
      padding: 6px 4px 10px;
      text-align: center;
    }

    @media (max-width: 620px){
      input[type="number"]{ width: 140px; }
      .cell{ width: 38px; height: 38px; border-radius: 10px; }
      .board{ grid-auto-rows: 38px; gap: 5px; }
      .boardWrap{ max-height: calc(100vh - 270px); }
    }