@import url('./tokens.css');

.senior-shell {
  margin: 0 0 24px;
  color: #0f172a;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding: 0;
}

.is-seniors-page .site-main,
.is-seniors-page article.post,
.is-seniors-page article,
.is-hexadoku-page .site-main,
.is-hexadoku-page article.post,
.is-hexadoku-page article {
  padding-left: 0;
  padding-right: 0;
  margin-left: 0;
  margin-right: 0;
  max-width: 100%;
  width: 100%;
}

.senior-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0 8px;
  width: 100%;
  justify-content: center;
}

.senior-actions button {
  border-radius: 12px;
  border: 1px solid #d5deea;
  background: #eef2f8;
  color: #0f172a;
  padding: 12px 12px;
  font-weight: 700;
  font-size: 1.05rem;
  min-width: 0;
  cursor: pointer;
  transition: transform 0.1s ease, border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 6px 14px rgba(15, 23, 42, 0.1);
  flex: 0 1 160px;
}

.senior-actions button:hover {
  border-color: #3b82f6;
  background: #e4ecfb;
  box-shadow: 0 10px 18px rgba(37, 99, 235, 0.15);
}

.senior-actions button:active {
  transform: translateY(1px) scale(0.99);
}

.senior-actions button[data-action="senior-new"],
.senior-actions button[data-action="senior-check"] {
  background: #2563eb;
  border-color: #1d4ed8;
  color: #ffffff;
}

.senior-actions button[data-action="senior-new"]:hover,
.senior-actions button[data-action="senior-check"]:hover {
  background: #1d4ed8;
  border-color: #1e40af;
}

.senior-actions button[data-action="senior-reset"] {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.senior-layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  width: 100%;
}

.senior-board {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 0;
  background: #f6f8fb;
  padding: 0;
  border: 3px solid #d9e2ec;
  width: min(100%, 520px);
  box-sizing: border-box;
  max-width: 520px;
  margin: 0 auto;
}

.senior-board.is-16x16 {
  grid-template-columns: repeat(16, minmax(0, 1fr));
  width: min(100%, 900px);
  max-width: 900px;
}

.senior-cell {
  aspect-ratio: 1 / 1;
  border-radius: 0;
  border: 1px solid #d5deea;
  background: #ffffff;
  color: #0f172a;
  font-size: clamp(0.95rem, 3vw, 1.2rem);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease, transform 0.1s ease;
  user-select: none;
  min-height: clamp(32px, 9vw, 46px);
}

.senior-board.is-16x16 .senior-cell {
  font-size: clamp(0.7rem, 2.1vw, 1.05rem);
  min-height: clamp(28px, 5vw, 40px);
}

.senior-cell.is-given {
  background: #eef2f8;
  color: #000000;
  font-weight: 700;
  cursor: default;
}

.senior-cell.is-user {
  color: #0f3e9e;
}

.senior-cell.is-selected {
  border-color: #3b82f6;
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.senior-cell.is-error {
  border-color: #f97373;
  background: #ffecec;
}

.senior-cell.is-highlight {
  background: #fff8e1;
}

/* 9x9 separators */
.senior-board:not(.is-16x16) .senior-cell:nth-child(-n + 9) {
  border-top-width: 3px;
  border-top-color: #d9e2ec;
}
.senior-board:not(.is-16x16) .senior-cell:nth-child(n + 73) {
  border-bottom-width: 3px;
  border-bottom-color: #d9e2ec;
}
.senior-board:not(.is-16x16) .senior-cell:nth-child(9n + 1) {
  border-left-width: 3px;
  border-left-color: #d9e2ec;
}
.senior-board:not(.is-16x16) .senior-cell:nth-child(9n) {
  border-right-width: 3px;
  border-right-color: #d9e2ec;
}
.senior-board:not(.is-16x16) .senior-cell:nth-child(n + 28):nth-child(-n + 36),
.senior-board:not(.is-16x16) .senior-cell:nth-child(n + 55):nth-child(-n + 63) {
  border-top-width: 3px;
  border-top-color: #d9e2ec;
}
.senior-board:not(.is-16x16) .senior-cell:nth-child(n + 19):nth-child(-n + 27),
.senior-board:not(.is-16x16) .senior-cell:nth-child(n + 46):nth-child(-n + 54) {
  border-bottom-width: 3px;
  border-bottom-color: #d9e2ec;
}
.senior-board:not(.is-16x16) .senior-cell:nth-child(9n + 4),
.senior-board:not(.is-16x16) .senior-cell:nth-child(9n + 7) {
  border-left-width: 3px;
  border-left-color: #d9e2ec;
}
.senior-board:not(.is-16x16) .senior-cell:nth-child(9n + 3),
.senior-board:not(.is-16x16) .senior-cell:nth-child(9n + 6) {
  border-right-width: 3px;
  border-right-color: #d9e2ec;
}

/* 16x16 separators */
.senior-board.is-16x16 .senior-cell:nth-child(-n + 16) {
  border-top-width: 3px;
  border-top-color: #d9e2ec;
}
.senior-board.is-16x16 .senior-cell:nth-child(n + 241) {
  border-bottom-width: 3px;
  border-bottom-color: #d9e2ec;
}
.senior-board.is-16x16 .senior-cell:nth-child(16n + 1) {
  border-left-width: 3px;
  border-left-color: #d9e2ec;
}
.senior-board.is-16x16 .senior-cell:nth-child(16n) {
  border-right-width: 3px;
  border-right-color: #d9e2ec;
}
.senior-board.is-16x16 .senior-cell:nth-child(n + 65):nth-child(-n + 80),
.senior-board.is-16x16 .senior-cell:nth-child(n + 129):nth-child(-n + 144),
.senior-board.is-16x16 .senior-cell:nth-child(n + 193):nth-child(-n + 208) {
  border-top-width: 3px;
  border-top-color: #d9e2ec;
}
.senior-board.is-16x16 .senior-cell:nth-child(n + 49):nth-child(-n + 64),
.senior-board.is-16x16 .senior-cell:nth-child(n + 113):nth-child(-n + 128),
.senior-board.is-16x16 .senior-cell:nth-child(n + 177):nth-child(-n + 192) {
  border-bottom-width: 3px;
  border-bottom-color: #d9e2ec;
}
.senior-board.is-16x16 .senior-cell:nth-child(16n + 5),
.senior-board.is-16x16 .senior-cell:nth-child(16n + 9),
.senior-board.is-16x16 .senior-cell:nth-child(16n + 13) {
  border-left-width: 3px;
  border-left-color: #d9e2ec;
}
.senior-board.is-16x16 .senior-cell:nth-child(16n + 4),
.senior-board.is-16x16 .senior-cell:nth-child(16n + 8),
.senior-board.is-16x16 .senior-cell:nth-child(16n + 12) {
  border-right-width: 3px;
  border-right-color: #d9e2ec;
}

.senior-keypad {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  width: min(100%, 520px);
}

.senior-keypad.is-16x16 {
  grid-template-columns: repeat(8, minmax(0, 1fr));
  width: min(100%, 900px);
}

.senior-keypad button {
  border: 1px solid #d5deea;
  background: #f8fafc;
  color: #0f172a;
  border-radius: 12px;
  padding: 14px 12px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s ease, border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 6px 14px rgba(15, 23, 42, 0.08);
  width: 100%;
}

.senior-keypad button:hover {
  border-color: #3b82f6;
  background: #e4ecfb;
  box-shadow: 0 8px 16px rgba(37, 99, 235, 0.14);
}

.senior-keypad button:active {
  transform: translateY(1px) scale(0.99);
}

.senior-keypad .ghost {
  background: #fff8e1;
  border-color: #facc15;
  color: #92400e;
}

.senior-subcontrols {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 10px;
  justify-content: center;
}

.senior-subcontrols .link-button {
  background: none;
  border: none;
  color: #2563eb;
  font-weight: 700;
  padding: 4px 0;
  cursor: pointer;
}

.senior-subcontrols .toggle-button {
  border-radius: 10px;
  border: 1px solid #d5deea;
  background: #eef2f8;
  color: #0f172a;
  padding: 10px 12px;
  font-weight: 700;
  cursor: pointer;
}

.senior-subcontrols .toggle-button[aria-pressed="true"] {
  background: #2563eb;
  border-color: #1d4ed8;
  color: #ffffff;
}

.senior-status {
  display: block;
  margin: 20px 0 0;
  padding-top: 6px;
  color: #475569;
  font-size: 1.05rem;
}

@media (min-width: 640px) {
  .senior-keypad {
    grid-template-columns: repeat(5, minmax(70px, 1fr));
  }
  .senior-keypad.is-16x16 {
    grid-template-columns: repeat(8, minmax(70px, 1fr));
  }
}

@media (min-width: 960px) {
  .is-seniors-page .site-main,
  .is-seniors-page article.post,
  .is-seniors-page article,
  .is-hexadoku-page .site-main,
  .is-hexadoku-page article.post,
  .is-hexadoku-page article {
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 12px;
    padding-right: 12px;
  }
  .senior-board {
    max-width: 760px;
  }
  .senior-board.is-16x16 {
    max-width: 960px;
  }
}