.sol-layout {
  grid-template-columns: minmax(180px, 220px) minmax(0, 1fr) minmax(200px, 240px);
  max-width: 1420px;
}

.sol-board-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 100%;
  min-width: 0;
  padding-bottom: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.sol-board {
  container-type: inline-size;
  --board-pad: clamp(12px, 2vw, 24px);
  --card-gap: clamp(4px, 0.55cqi, 14px);
  --card-w: clamp(52px, calc((100cqi - var(--card-gap) * 6) / 7), 124px);
  --card-h: calc(var(--card-w) * 1.4);
  --card-stack-down: clamp(14px, calc(var(--card-h) * 0.17), 24px);
  --card-stack-up: clamp(38px, calc(var(--card-h) * 0.48), 72px);
  --card-radius: clamp(6px, calc(var(--card-w) * 0.1), 10px);
  --waste-spread: clamp(6px, calc(var(--card-w) * 0.16), 18px);
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  padding: var(--board-pad);
  border-radius: var(--radius);
  background:
    radial-gradient(ellipse 120% 80% at 50% 0%, rgba(255, 255, 255, 0.06), transparent 55%),
    linear-gradient(180deg, #1f6b3a 0%, #155530 48%, #124828 100%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 12px 32px rgba(0, 0, 0, 0.35);
}

.sol-top {
  display: grid;
  grid-template-columns: repeat(7, var(--card-w));
  gap: var(--card-gap);
  width: fit-content;
  max-width: 100%;
  margin-inline: auto;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.sol-top__stock,
.sol-top__waste,
.sol-top__foundations {
  display: contents;
}

.sol-top__group {
  display: flex;
  gap: var(--card-gap);
  min-width: 0;
}

.sol-top__group:first-child {
  grid-column: 1 / span 2;
  overflow: visible;
  min-width: calc(var(--card-w) * 2 + var(--card-gap) + var(--waste-spread) * 2);
}

#pile-waste {
  width: calc(var(--card-w) + var(--waste-spread) * 2);
  flex: 0 0 calc(var(--card-w) + var(--waste-spread) * 2);
}

.sol-top__group--foundations {
  grid-column: 3 / -1;
  justify-content: flex-end;
}

.sol-tableau {
  display: grid;
  grid-template-columns: repeat(7, var(--card-w));
  gap: var(--card-gap);
  width: fit-content;
  max-width: 100%;
  margin-inline: auto;
  min-height: calc(var(--card-h) + var(--card-stack-down) * 3 + var(--card-stack-up) * 3);
}

.sol-pile,
.sol-column {
  position: relative;
  width: var(--card-w);
  flex: 0 0 var(--card-w);
  min-height: var(--card-h);
}

.sol-column {
  min-height: calc(var(--card-h) + var(--card-stack-down) * 3 + var(--card-stack-up) * 3);
}

.sol-slot {
  width: var(--card-w);
  height: var(--card-h);
  border-radius: 10px;
  border: 2px dashed rgba(255, 255, 255, 0.22);
  background: rgba(0, 0, 0, 0.08);
  transition: border-color 0.15s, background 0.15s;
}

.sol-slot--empty:hover,
.sol-slot--drop-target,
.sol-pile--drop-target .sol-slot {
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.08);
}

.sol-pile--drop-target:not(:has(.sol-slot))::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 10px;
  border: 2px solid rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.sol-card {
  position: absolute;
  left: 0;
  width: var(--card-w);
  height: var(--card-h);
  border-radius: var(--card-radius);
  user-select: none;
  touch-action: none;
  -webkit-touch-callout: none;
  cursor: grab;
  transition: transform 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.2s ease, opacity 0.15s ease;
  z-index: 1;
  overflow: hidden;
  box-shadow:
    0 1px 0 rgba(0, 0, 0, 0.35),
    0 4px 10px rgba(0, 0, 0, 0.28),
    0 10px 22px rgba(0, 0, 0, 0.18);
}

.sol-column .sol-card {
  z-index: calc(1 + var(--stack-layer, 0));
}

.sol-card--ghost {
  opacity: 0;
  pointer-events: none;
}

.sol-card:active {
  cursor: grabbing;
}

.sol-card--back {
  cursor: pointer;
}

.sol-card--selected {
  transform: translateY(-4px);
  box-shadow:
    0 0 0 2px rgba(255, 255, 255, 0.85),
    0 12px 28px rgba(0, 0, 0, 0.4);
  z-index: 20;
}

.sol-card__face,
.sol-card__back {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  box-sizing: border-box;
}

.sol-card__face {
  position: relative;
  background: #fff;
  border: 1px solid #c8c2b8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.sol-card__corner {
  position: absolute;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 2px;
  line-height: 1;
  z-index: 2;
}

.sol-card__corner--tl {
  top: 5%;
  left: 7%;
}

.sol-card__corner--br {
  bottom: 5%;
  right: 7%;
  transform: rotate(180deg);
}

.sol-card__rank {
  font-family: Georgia, "Times New Roman", Times, serif;
  font-weight: 700;
  font-size: calc(var(--card-w) * 0.22);
  letter-spacing: -0.02em;
}

.sol-card__suit {
  font-size: calc(var(--card-w) * 0.18);
  line-height: 0.9;
}

/* Numbered cards — larger corners and pips */
.sol-card__face--pip .sol-card__rank {
  font-size: calc(var(--card-w) * 0.28);
}

.sol-card__face--pip .sol-card__suit {
  font-size: calc(var(--card-w) * 0.23);
}

.sol-card__face--pip .sol-card__pip {
  font-size: calc(var(--card-w) * 0.17);
}

.sol-card__face--pip .sol-card__pips {
  inset: 18% 8%;
}

.sol-card__corner--red .sol-card__rank,
.sol-card__corner--red .sol-card__suit,
.sol-card__pip--red,
.sol-card__emblem--red {
  color: #d01828;
}

.sol-card__corner:not(.sol-card__corner--red) .sol-card__rank,
.sol-card__corner:not(.sol-card__corner--red) .sol-card__suit,
.sol-card__pip:not(.sol-card__pip--red),
.sol-card__emblem:not(.sol-card__emblem--red) {
  color: #111;
}

.sol-card__pips {
  position: absolute;
  inset: 14% 10%;
}

.sol-card__pip {
  position: absolute;
  transform: translate(-50%, -50%);
  font-size: calc(var(--card-w) * 0.14);
  line-height: 1;
}

.sol-card__emblem {
  position: absolute;
  inset: 22% 14%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2%;
  border: 2px solid currentColor;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.96);
}

.sol-card__emblem-rank {
  font-family: Georgia, "Times New Roman", Times, serif;
  font-weight: 700;
  font-size: calc(var(--card-w) * 0.28);
  line-height: 1;
}

.sol-card__emblem-suit {
  font-size: calc(var(--card-w) * 0.34);
  line-height: 0.9;
}

.sol-card__emblem:not(:has(.sol-card__emblem-rank)) .sol-card__emblem-suit {
  font-size: calc(var(--card-w) * 0.52);
}

.sol-card__back {
  position: relative;
  background:
    repeating-linear-gradient(
      45deg,
      rgba(255, 255, 255, 0.06) 0,
      rgba(255, 255, 255, 0.06) 3px,
      transparent 3px,
      transparent 8px
    ),
    repeating-linear-gradient(
      -45deg,
      rgba(255, 255, 255, 0.04) 0,
      rgba(255, 255, 255, 0.04) 3px,
      transparent 3px,
      transparent 8px
    ),
    linear-gradient(160deg, #1a4f96 0%, #123a72 55%, #0f305f 100%);
  border: 2px solid #c9a84c;
  box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.12);
}

.sol-card__back::after {
  content: "";
  position: absolute;
  inset: 18%;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 4px;
  pointer-events: none;
}

.sol-drag-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
}

.sol-drag-stack {
  position: fixed;
  left: 0;
  top: 0;
  pointer-events: none;
  z-index: 1001;
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.42));
  will-change: transform;
  contain: layout style;
}

.sol-drag-stack .sol-card {
  position: absolute;
  left: 0;
  width: var(--card-w);
  height: var(--card-h);
  cursor: grabbing;
  transition: none;
  transform: none;
  box-shadow:
    0 1px 0 rgba(0, 0, 0, 0.35),
    0 8px 20px rgba(0, 0, 0, 0.35);
}

.sol-board--busy {
  pointer-events: none;
}

.sol-fly-card {
  position: absolute;
  inset: 0;
  perspective: 2200px;
  perspective-origin: center center;
}

.sol-fly-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transform: rotateY(0deg);
  will-change: transform;
  transition: none;
}

.sol-fly-card__inner--face {
  transform: rotateY(180deg);
}

.sol-fly-card__side {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 10px;
  overflow: hidden;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  box-shadow:
    0 1px 0 rgba(0, 0, 0, 0.35),
    0 6px 16px rgba(0, 0, 0, 0.28);
}

.sol-fly-card__face {
  transform: rotateY(180deg);
}

.sol-card--flip-target .sol-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}

.sol-card--flip-target .sol-card__inner--face {
  transform: rotateY(180deg);
}

.sol-card--flip-target .sol-card__side {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 10px;
  overflow: hidden;
  backface-visibility: hidden;
}

.sol-card--flip-target > .sol-card__face,
.sol-card--flip-target > .sol-card__back {
  visibility: hidden;
}

.sol-difficulty-picker {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sol-difficulty-picker__btn {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-muted);
  font: inherit;
  text-align: left;
  cursor: pointer;
  touch-action: manipulation;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.sol-difficulty-picker__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
}

.sol-difficulty-picker__label {
  font-size: 0.88rem;
  font-weight: 700;
  color: inherit;
}

.sol-difficulty-picker__pts {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--orange);
  white-space: nowrap;
}

.sol-difficulty-picker__hint {
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--text-muted);
}

.sol-difficulty-picker__btn--active {
  border-color: rgba(184, 255, 46, 0.45);
  background: rgba(184, 255, 46, 0.08);
  color: var(--text);
}

.sol-difficulty-picker__btn--active .sol-difficulty-picker__hint {
  color: rgba(238, 242, 247, 0.78);
}

.scores__total {
  margin: 0 0 12px;
  font-size: 1.05rem;
  font-weight: 700;
}

.scores__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scores__list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.sol-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sol-option {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
  cursor: pointer;
}

.sol-option input {
  accent-color: var(--green);
}

.panel__block .btn--block + .btn--block {
  margin-top: 8px;
}

.panel__block .btn,
.sol-mobile-bar__btn {
  touch-action: manipulation;
}

.panel__block .btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.controls-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.controls-list li + li {
  margin-top: 6px;
}

.sol-controls-mobile-hint {
  display: none;
}

.board-status {
  min-height: 1.4em;
  margin: 0;
  width: 100%;
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
}

.board-status--win {
  color: var(--green);
  font-weight: 700;
}

.sol-mobile-bar {
  display: none;
}

.sol-mobile-bar__btn {
  display: inline-flex;
  flex: 1;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  min-height: 52px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text);
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  touch-action: manipulation;
  transition: border-color 0.15s, background 0.15s;
}

.sol-mobile-bar__btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.sol-mobile-bar__btn--primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--green), var(--green-dim));
  color: #0a0f14;
}

.sol-mobile-bar__icon {
  font-size: 1.15rem;
  line-height: 1;
}

@media (max-width: 1100px) {
  .sol-layout {
    max-width: 100%;
  }
}

@media (max-width: 900px) {
  .sol-layout {
    grid-template-columns: 1fr;
    padding-bottom: calc(84px + env(safe-area-inset-bottom, 0px));
  }

  .sol-board-wrap {
    order: 0;
  }

  .panel--left {
    order: 1;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    max-width: none;
    width: 100%;
    margin: 0;
  }

  .panel--right {
    order: 2;
  }

  .panel--left > .panel__block {
    margin-bottom: 0;
  }

  .panel--left > .panel__block--actions {
    display: none;
  }

  .panel--left > .sol-difficulty {
    grid-column: 1 / -1;
  }

  .panel--left > .panel__block:last-child {
    grid-column: 1 / -1;
  }

  .sol-board {
    --board-pad: clamp(10px, 2.5vw, 16px);
    --card-stack-down: clamp(12px, calc(var(--card-h) * 0.16), 22px);
    --card-stack-up: clamp(34px, calc(var(--card-h) * 0.42), 62px);
    --waste-spread: clamp(5px, calc(var(--card-w) * 0.14), 16px);
  }

  .sol-mobile-bar {
    display: flex;
    gap: 10px;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 50;
    padding: 8px 12px calc(8px + env(safe-area-inset-bottom, 0px));
    background: rgba(7, 9, 13, 0.96);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border);
  }

  .header {
    padding-top: calc(12px + env(safe-area-inset-top, 0px));
  }

  .header__stats {
    margin-left: 0;
    width: 100%;
    flex-wrap: wrap;
  }

  .sol-home-link {
    margin-left: auto;
    padding-inline: 14px;
    font-size: 0.85rem;
  }
}

@media (max-width: 600px) {
  .header {
    gap: 10px;
    padding-inline: 14px;
  }

  .logo__subtitle {
    display: none;
  }

  .header__stat {
    padding: 6px 12px;
    font-size: 0.88rem;
  }

  .sol-board {
    --card-gap: clamp(3px, 1vw, 8px);
    --card-stack-down: clamp(11px, calc(var(--card-h) * 0.15), 20px);
    --card-stack-up: clamp(32px, calc(var(--card-h) * 0.40), 56px);
    border-radius: var(--radius-sm);
  }

  .sol-top {
    margin-bottom: clamp(12px, 2.5vw, 18px);
  }

  .sol-tableau {
    min-height: calc(var(--card-h) + var(--card-stack-down) * 2 + var(--card-stack-up) * 3);
  }

  .sol-column {
    min-height: calc(var(--card-h) + var(--card-stack-down) * 2 + var(--card-stack-up) * 3);
  }

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

  .panel--right {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .panel--right > .panel__block {
    margin-bottom: 0;
  }

  .panel--right > .leaderboard {
    grid-column: 1 / -1;
  }

  .sol-difficulty-picker__hint {
    font-size: 0.76rem;
  }

  .controls-list {
    font-size: 0.82rem;
  }

  .sol-controls-mobile-hint {
    display: list-item;
  }

  .panel__block {
    padding: 14px;
  }

  .sol-home-link {
    padding-inline: 12px;
  }
}

@media (max-width: 380px) {
  .sol-board {
    --board-pad: 8px;
    --card-gap: 2px;
  }

  .logo__title {
    font-size: 0.92rem;
  }

  .sol-home-link {
    font-size: 0;
    padding-inline: 10px;
    min-width: 40px;
  }

  .sol-home-link::after {
    content: "←";
    font-size: 1rem;
    font-weight: 700;
  }
}

@media (max-height: 520px) and (orientation: landscape) {
  .sol-layout {
    padding-bottom: calc(72px + env(safe-area-inset-bottom, 0px));
  }

  .sol-board {
    --card-stack-down: clamp(10px, calc(var(--card-h) * 0.14), 18px);
    --card-stack-up: clamp(28px, calc(var(--card-h) * 0.36), 48px);
  }

  .panel--left {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .panel--left > .panel__block:last-child {
    grid-column: auto;
  }

  .controls-list {
    font-size: 0.78rem;
  }

  .controls-list li + li {
    margin-top: 4px;
  }
}