:root{
  --bg: #eef1f8;
  --bg-2: #e5ebf7;
  --surface: #ffffff;
  --surface-2: #f6f8fd;
  --surface-3: #eef2fa;
  --ink: #1f2333;
  --ink-soft: #4b546f;
  --muted: #7b849b;
  --line: rgba(90, 104, 140, 0.12);

  --primary: #6c5ce7;
  --primary-dark: #5848d6;
  --primary-soft: rgba(108, 92, 231, 0.12);

  --accent: #00b894;
  --accent-soft: rgba(0, 184, 148, 0.14);

  --danger: #ff5d73;
  --danger-soft: rgba(255, 93, 115, 0.14);

  --warning: #ffb340;
  --warning-soft: rgba(255, 179, 64, 0.15);

  --radius-xs: 10px;
  --radius-sm: 14px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 30px;
  --radius-full: 999px;

  --shadow-soft: 0 10px 30px rgba(31, 35, 51, 0.08);
  --shadow-lift: 0 18px 44px rgba(31, 35, 51, 0.14);
  --shadow-game: 0 24px 80px rgba(53, 63, 110, 0.14);

  --dur-fast: 0.16s;
  --dur-med: 0.32s;
  --dur-slow: 0.48s;
  --ease: cubic-bezier(.22,.9,.32,1);

  --topbar-h: 72px;
  --board-max: 640px;
}

[data-theme="dark"]{
  --bg: #121521;
  --bg-2: #181c2a;
  --surface: #1d2132;
  --surface-2: #23283b;
  --surface-3: #2a3046;
  --ink: #edf1fa;
  --ink-soft: #c4cbe0;
  --muted: #99a4bf;
  --line: rgba(180, 190, 220, 0.12);

  --primary: #8b7cf0;
  --primary-dark: #7667e7;
  --primary-soft: rgba(139, 124, 240, 0.14);

  --accent: #18c6a2;
  --accent-soft: rgba(24, 198, 162, 0.16);

  --danger: #ff7a8e;
  --danger-soft: rgba(255, 122, 142, 0.16);

  --warning: #ffc86b;
  --warning-soft: rgba(255, 200, 107, 0.18);

  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.28);
  --shadow-lift: 0 18px 44px rgba(0, 0, 0, 0.38);
  --shadow-game: 0 24px 80px rgba(0, 0, 0, 0.42);
}

*{
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body{
  margin: 0;
  padding: 0;
  min-height: 100%;
}

html{
  scroll-behavior: smooth;
}

body{
  font-family: "Poppins", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(108, 92, 231, 0.07), transparent 26%),
    radial-gradient(circle at bottom right, rgba(0, 184, 148, 0.08), transparent 24%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  -webkit-font-smoothing: antialiased;
  transition:
    background var(--dur-med) var(--ease),
    color var(--dur-med) var(--ease);
  overscroll-behavior: none;
  touch-action: manipulation;
}

button,
input,
select{
  font: inherit;
}

button{
  border: none;
  cursor: pointer;
}

#app{
  width: min(100%, 1100px);
  margin: 0 auto;
  min-height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
  padding-bottom: 20px;
}

/* =========================
   TOPBAR
========================= */
.topbar{
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--line);
}

.topbar-left,
.topbar-right{
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-wrap{
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand{
  margin: 0;
  font-size: 1.18rem;
  line-height: 1;
  font-weight: 800;
  letter-spacing: .2px;
}

.brand span{
  color: var(--primary);
  margin-inline: 2px;
}

.brand-sub{
  margin: 0;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 600;
}

.icon-btn,
.mini-icon-btn{
  border-radius: 50%;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    transform var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease);
}

.icon-btn{
  width: 40px;
  height: 40px;
  font-size: 1rem;
  font-weight: 700;
}

.mini-icon-btn{
  width: 32px;
  height: 32px;
  font-size: .9rem;
  font-weight: 700;
}

.icon-btn:hover,
.mini-icon-btn:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.icon-btn:active,
.mini-icon-btn:active{
  transform: scale(.94);
}

/* =========================
   GENERIC
========================= */
.screen{
  display: none;
  flex: 1;
  padding: 16px;
  animation: screenIn var(--dur-slow) var(--ease);
}

.screen.active{
  display: flex;
}

@keyframes screenIn{
  from{
    opacity: 0;
    transform: translateY(10px);
  }
  to{
    opacity: 1;
    transform: translateY(0);
  }
}

.card{
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.eyebrow{
  margin: 0 0 8px;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--muted);
  font-weight: 700;
}

.help-text{
  margin: 8px 0 0;
  color: var(--muted);
  font-size: .84rem;
  line-height: 1.6;
}

.help-copy{
  margin: 0;
  color: var(--ink-soft);
  font-size: .92rem;
  line-height: 1.7;
}

.mini-badge,
.panel-note,
.mode-tag{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border-radius: var(--radius-full);
  font-size: .72rem;
  font-weight: 700;
  line-height: 1;
}

.mini-badge{
  background: var(--primary-soft);
  color: var(--primary);
}

.panel-note{
  background: var(--accent-soft);
  color: var(--accent);
}

.mode-tag{
  background: rgba(90, 104, 140, 0.1);
  color: var(--ink-soft);
}

.muted{
  color: var(--muted);
}

/* =========================
   SETUP
========================= */
.setup-grid{
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.setup-card,
.setup-side-card{
  padding: 18px;
}

.setup-header,
.panel-title-row,
.side-title-row,
.mode-top{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.setup-header h2,
.setup-side-card h3,
.analysis-card h3,
.help-mini-card h3,
.modal-head h2{
  margin: 0;
  line-height: 1.1;
}

.setup-header h2{
  font-size: 1.35rem;
}

.field-group{
  margin-top: 18px;
}

.field-group > label{
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.segmented{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.seg-btn{
  flex: 1;
  min-width: 66px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--ink);
  border: 1px solid transparent;
  font-weight: 700;
  transition:
    transform var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease);
}

.seg-btn:hover{
  transform: translateY(-1px);
  background: var(--surface-3);
}

.seg-btn.active{
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: var(--shadow-soft);
}

.toggle-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-weight: 600;
}

.switch{
  position: relative;
  width: 48px;
  height: 28px;
  display: inline-block;
}

.switch input{
  opacity: 0;
  width: 0;
  height: 0;
}

.slider{
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: color-mix(in srgb, var(--muted) 35%, var(--surface));
  transition: background var(--dur-fast) var(--ease);
}

.slider::before{
  content: "";
  position: absolute;
  top: 4px;
  left: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--shadow-soft);
  transition: transform var(--dur-fast) var(--ease);
}

.switch input:checked + .slider{
  background: var(--primary);
}

.switch input:checked + .slider::before{
  transform: translateX(20px);
}

.player-fields{
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.player-field{
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  transition:
    box-shadow var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease),
    transform var(--dur-fast) var(--ease);
}

.player-field:focus-within{
  border-color: color-mix(in srgb, var(--primary) 45%, var(--line));
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.12);
}

.player-field:hover{
  transform: translateY(-1px);
}

.player-field input[type="text"]{
  flex: 1;
  min-width: 180px;
  border: none;
  outline: none;
  background: transparent;
  color: var(--ink);
  font-size: .95rem;
  font-weight: 600;
}

.player-field input[type="text"]::placeholder{
  color: var(--muted);
}

.player-field input[type="color"]{
  width: 34px;
  height: 34px;
  padding: 0;
  border: none;
  border-radius: 10px;
  background: transparent;
  overflow: hidden;
  cursor: pointer;
}

.player-field .ai-select{
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  background: var(--surface);
  color: var(--ink-soft);
  font-size: .82rem;
  font-weight: 700;
  outline: none;
}

.setup-actions{
  margin-top: 20px;
}

.side-block + .side-block{
  margin-top: 22px;
}

.mode-list{
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.mode-card{
  padding: 14px;
  border-radius: var(--radius-md);
  background: var(--surface-2);
  border: 1px solid var(--line);
  transition:
    transform var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease);
}

.mode-card:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.mode-card p{
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: .84rem;
  line-height: 1.65;
}

.mode-name{
  font-weight: 800;
  font-size: .95rem;
}

.mode-normal{ border-color: color-mix(in srgb, var(--accent) 18%, var(--line)); }
.mode-hard{ border-color: color-mix(in srgb, var(--primary) 18%, var(--line)); }
.mode-expert{ border-color: color-mix(in srgb, var(--warning) 20%, var(--line)); }
.mode-hell{ border-color: color-mix(in srgb, var(--danger) 22%, var(--line)); }

.compact-rules-card .mini-rules{
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: .88rem;
  line-height: 1.7;
}

.compact-rules-card .mini-rules li + li{
  margin-top: 6px;
}

/* =========================
   BUTTONS
========================= */
.btn-primary,
.btn-secondary{
  border-radius: var(--radius-sm);
  font-weight: 800;
  transition:
    transform var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease),
    opacity var(--dur-fast) var(--ease);
}

.btn-primary{
  width: 100%;
  padding: 15px 18px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.btn-primary:active{
  transform: scale(.98);
}

.btn-secondary{
  background: var(--surface);
  color: var(--ink);
  padding: 13px 16px;
  box-shadow: var(--shadow-soft);
}

.btn-secondary:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.btn-secondary:active{
  transform: scale(.97);
}

.btn-secondary:disabled{
  opacity: .45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* =========================
   GAME
========================= */
#gameScreen{
  align-items: stretch;
}

.game-shell{
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.game-top-panels,
.game-bottom-panels{
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.scorebar{
  width: 100%;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 2px 8px;
  scrollbar-width: none;
}

.scorebar::-webkit-scrollbar{
  display: none;
}

.score-chip{
  min-width: 96px;
  flex: 1;
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  padding: 10px 12px;
  text-align: center;
  transition:
    transform var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease);
}

.score-chip.active-turn{
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.score-chip .name{
  font-size: .74rem;
  font-weight: 800;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.score-chip .score{
  font-size: 1.35rem;
  font-weight: 800;
  margin-top: 3px;
  transition: transform var(--dur-fast) var(--ease);
}

.score-chip .score.bump{
  transform: scale(1.32);
}

.game-meta-panel{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.meta-chip{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  box-shadow: var(--shadow-soft);
}

.meta-label{
  display: block;
  color: var(--muted);
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.meta-value{
  display: block;
  margin-top: 6px;
  color: var(--ink);
  font-size: .95rem;
  font-weight: 800;
}

.board-stage{
  display: flex;
  justify-content: center;
}

.board-wrap{
  width: 100%;
  max-width: var(--board-max);
  aspect-ratio: 1 / 1;
  position: relative;
  border-radius: 28px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface) 96%, transparent), color-mix(in srgb, var(--surface-2) 92%, transparent));
  border: 1px solid var(--line);
  box-shadow: var(--shadow-game);
  overflow: hidden;
}

.board-wrap::before{
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top, rgba(108, 92, 231, 0.06), transparent 28%),
    radial-gradient(circle at bottom right, rgba(0, 184, 148, 0.05), transparent 26%);
  pointer-events: none;
}

.board-svg,
.confetti-canvas{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.board-svg{
  z-index: 2;
  display: block;
  touch-action: manipulation;
}

.confetti-canvas{
  z-index: 5;
  pointer-events: none;
}

.turn-banner{
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translate(-50%, -120%);
  z-index: 8;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  color: #fff;
  font-size: .82rem;
  font-weight: 800;
  box-shadow: var(--shadow-soft);
  opacity: 0;
  transition:
    transform var(--dur-med) var(--ease),
    opacity var(--dur-med) var(--ease);
  white-space: nowrap;
}

.turn-banner.show{
  opacity: 1;
  transform: translate(-50%, 0);
}

.ai-thinking-overlay{
  position: absolute;
  inset: 0;
  z-index: 9;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(15, 19, 32, 0.14);
  backdrop-filter: blur(3px);
}

.ai-thinking-overlay.show{
  display: flex;
}

.thinking-card{
  min-width: 180px;
  max-width: 240px;
  padding: 16px 18px;
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface) 96%, transparent);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lift);
  text-align: center;
}

.thinking-card p{
  margin: 10px 0 0;
  font-size: .92rem;
  font-weight: 700;
  color: var(--ink);
}

.thinking-dots{
  display: flex;
  justify-content: center;
  gap: 8px;
}

.thinking-dots span{
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  animation: thinkingBounce 1s infinite ease-in-out;
}

.thinking-dots span:nth-child(2){ animation-delay: .12s; }
.thinking-dots span:nth-child(3){ animation-delay: .24s; }

@keyframes thinkingBounce{
  0%, 80%, 100%{
    transform: translateY(0);
    opacity: .45;
  }
  40%{
    transform: translateY(-6px);
    opacity: 1;
  }
}

.controls-bar{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.analysis-card,
.help-mini-card{
  padding: 16px;
}

.analysis-grid{
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.analysis-item{
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px;
}

.analysis-label{
  display: block;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.analysis-value{
  display: block;
  margin-top: 6px;
  color: var(--ink);
  font-size: .96rem;
  font-weight: 800;
}

/* =========================
   SVG BOARD VISUALS
========================= */
.dot{
  fill: #afb7cd;
  transition: fill var(--dur-fast) var(--ease);
}

[data-theme="dark"] .dot{
  fill: #5a6178;
}

.line-slot{
  stroke: transparent;
  stroke-width: 3.6;
  cursor: pointer;
  transition: stroke var(--dur-fast) var(--ease);
}

.line-slot:hover{
  stroke: rgba(108, 92, 231, 0.22);
}

.line-slot.hint-glow{
  stroke: rgba(0, 184, 148, 0.68);
  animation: hintPulse 1.05s ease-in-out infinite;
}

@keyframes hintPulse{
  0%, 100%{
    stroke-opacity: .35;
  }
  50%{
    stroke-opacity: 1;
  }
}

.line-drawn{
  stroke-linecap: round;
  stroke-width: 2.5;
  stroke-dasharray: 12;
  stroke-dashoffset: 12;
  animation: drawLine var(--dur-med) var(--ease) forwards;
}

@keyframes drawLine{
  to{
    stroke-dashoffset: 0;
  }
}

.box-fill{
  opacity: 0;
  transform-origin: center;
  animation: boxPop var(--dur-med) var(--ease) forwards;
}

@keyframes boxPop{
  0%{
    opacity: 0;
    transform: scale(.45);
  }
  100%{
    opacity: .86;
    transform: scale(1);
  }
}

/* =========================
   MODALS
========================= */
.modal-overlay{
  position: fixed;
  inset: 0;
  z-index: 70;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  background: rgba(13, 18, 30, 0.52);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-med) var(--ease);
}

.modal-overlay.show{
  opacity: 1;
  visibility: visible;
}

.modal-card{
  width: min(100%, 460px);
  max-height: 88vh;
  overflow-y: auto;
  position: relative;
  border-radius: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lift);
  padding: 22px 20px;
  transform: translateY(16px) scale(.98);
  transition: transform var(--dur-med) var(--ease);
}

.modal-overlay.show .modal-card{
  transform: translateY(0) scale(1);
}

.large-modal{
  width: min(100%, 700px);
}

.modal-close{
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--ink);
  font-weight: 800;
}

.modal-head{
  margin-bottom: 18px;
}

.modal-head h2{
  font-size: 1.35rem;
}

.modal-section + .modal-section{
  margin-top: 20px;
}

.rules-list{
  margin: 0;
  padding-left: 20px;
  color: var(--ink-soft);
  line-height: 1.8;
}

.tip{
  margin: 0;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--surface-2);
  color: var(--ink-soft);
  line-height: 1.7;
  border: 1px solid var(--line);
}

.mode-help-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.help-mode-box{
  padding: 12px 14px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.help-mode-box strong{
  display: block;
  margin-bottom: 6px;
  font-size: .92rem;
}

.help-mode-box p{
  margin: 0;
  color: var(--ink-soft);
  font-size: .86rem;
  line-height: 1.6;
}

.stats-body{
  margin: 4px 0 18px;
}

.stats-row{
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: .92rem;
}

.stats-empty{
  text-align: center;
  color: var(--muted);
  padding: 20px 0;
}

.gameover-body{
  margin: 10px 0 18px;
}

.gameover-body .winner-row{
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 0;
  font-weight: 800;
}

.modal-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.modal-actions .btn-primary,
.modal-actions .btn-secondary{
  flex: 1;
}

/* =========================
   FLOATING RULES BUTTON
========================= */
.float-info{
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-lift);
  display: none;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  transition:
    transform var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease);
}

body.game-active .float-info{
  display: flex;
}

.float-info:hover{
  transform: translateY(-2px) scale(1.04);
  box-shadow: var(--shadow-game);
}

.float-info:active{
  transform: scale(.96);
}

/* =========================
   RESPONSIVE
========================= */
@media (min-width: 760px){
  .screen{
    padding: 18px;
  }

  .setup-grid{
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
    align-items: start;
  }

  .setup-card,
  .setup-side-card{
    padding: 22px;
  }

  .controls-bar{
    grid-template-columns: repeat(4, 1fr);
  }

  .game-top-panels{
    grid-template-columns: 1.4fr .8fr;
    align-items: start;
  }

  .game-bottom-panels{
    grid-template-columns: 1.2fr .8fr;
  }

  .mode-help-grid{
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1080px){
  .screen{
    padding: 20px;
  }

  .setup-grid{
    gap: 18px;
  }

  .board-wrap{
    max-width: 690px;
  }

  .analysis-grid{
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 640px){
  .topbar{
    padding: 12px 12px;
    gap: 10px;
  }

  .brand{
    font-size: 1.05rem;
  }

  .brand-sub{
    display: none;
  }

  .topbar-right{
    gap: 6px;
  }

  .icon-btn{
    width: 38px;
    height: 38px;
  }

  .screen{
    padding: 12px;
  }

  .setup-card,
  .setup-side-card,
  .analysis-card,
  .help-mini-card{
    padding: 16px;
  }

  .game-meta-panel{
    grid-template-columns: 1fr;
  }

  .analysis-grid{
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 420px){
  .player-field{
    padding: 10px;
  }

  .player-field input[type="text"]{
    min-width: 120px;
  }

  .score-chip{
    min-width: 84px;
    padding: 10px;
  }

  .score-chip .score{
    font-size: 1.18rem;
  }

  .controls-bar{
    grid-template-columns: 1fr 1fr;
  }

  .analysis-grid{
    grid-template-columns: 1fr;
  }

  .modal-actions{
    flex-direction: column;
  }
}

/* =========================
   REDUCED MOTION
========================= */
@media (prefers-reduced-motion: reduce){
  *,
  *::before,
  *::after{
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}
/* =========================
   ADD ONLY — STACK SETUP CARDS
========================= */
.setup-grid{
  grid-template-columns: 1fr !important;
  align-items: stretch !important;
}

.main-setup-card,
.setup-side-card{
  width: 100%;
}

@media (min-width: 760px){
  .setup-grid{
    grid-template-columns: 1fr !important;
    align-items: stretch !important;
  }
}

@media (min-width: 1080px){
  .setup-grid{
    grid-template-columns: 1fr !important;
  }
}