.sudoku-mode-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    max-width: 460px;
    margin: 0 auto 20px;
}

.sudoku-mode-tab {
    flex: 1;
    min-width: 140px;
    padding: 10px 14px;
    border: 0.5px solid var(--color-border);
    background: white;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.sudoku-mode-tab.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.sudoku-mode-tab:not(.active):hover {
    background: var(--color-bg);
    border-color: var(--color-border-strong);
}

.game-container {
    max-width: 460px;
    margin: 0 auto;
}

.sudoku-title {
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}

.sudoku-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.sudoku-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 14px 20px;
    background: var(--color-surface);
    border: 0.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
}

.sudoku-stat {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sudoku-stat-icon {
    font-size: 18px;
    line-height: 1;
}

.sudoku-stat-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
}

.sudoku-stat-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
}

#sudoku-time-stat.urgent {
    color: var(--color-danger);
}

.sudoku-difficulty-picker {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sudoku-difficulty-btn {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 16px 20px;
    border: 0.5px solid var(--color-border);
    border-radius: var(--radius-md);
    background: white;
    cursor: pointer;
    transition: all 0.15s;
}

.sudoku-difficulty-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-tint);
}

.sudoku-difficulty-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
}

.sudoku-difficulty-points {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
}

.sudoku-tournament-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sudoku-tournament-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    padding: 20px 24px;
    border: 0.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
}

.sudoku-tournament-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sudoku-tournament-name {
    font-weight: 800;
    font-size: 22px;
    color: var(--color-text);
}

.sudoku-tournament-meta-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 15px;
    color: var(--color-text-secondary);
}

.sudoku-tournament-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.sudoku-tournament-meta-icon {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.sudoku-tournament-sep {
    color: var(--color-border-strong);
}

.sudoku-tournament-card .btn {
    flex: 0 0 auto;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 700;
    white-space: nowrap;
}

@media (max-width: 480px) {
    .sudoku-tournament-card {
        flex-direction: column;
        align-items: stretch;
    }

    .sudoku-tournament-card .btn {
        width: 100%;
    }
}

.sudoku-tournament-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-top: 16px;
}

.sudoku-grid {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    border: 2px solid var(--color-text);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 16px;
}

.sudoku-cell {
    aspect-ratio: 1;
    border: 1px solid var(--color-border);
    background: white;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.15s;
}

.sudoku-cell.given {
    color: var(--color-text);
    background: var(--color-bg);
    cursor: default;
}

.sudoku-cell.border-left {
    border-left: 2px solid var(--color-text);
}

.sudoku-cell.border-top {
    border-top: 2px solid var(--color-text);
}

.sudoku-cell.border-right {
    border-right: 2px solid var(--color-text);
}

.sudoku-cell.border-bottom {
    border-bottom: 2px solid var(--color-text);
}

.sudoku-cell.selected {
    background: var(--color-primary-tint);
}

.sudoku-cell.error {
    color: var(--color-danger);
}

.sudoku-cell.revealed {
    color: var(--color-danger);
    background: #FCEBE9;
}

.sudoku-cell:not(.given):hover {
    background: var(--color-primary-tint);
}

.sudoku-message {
    text-align: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-success);
    min-height: 20px;
    margin-bottom: 12px;
}

.sudoku-palette {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}

.sudoku-key {
    aspect-ratio: 1;
    width: 100%;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--color-primary);
    color: white;
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.15s;
}

.sudoku-key:hover {
    background: var(--color-primary-dark);
}

.sudoku-clear-btn {
    display: block;
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--color-text-muted);
    color: white;
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.15s;
}

.sudoku-clear-btn:hover {
    background: var(--color-text-secondary);
}

/* ---------- Post-round summary modal ----------
   Same overlay/dialog/close pattern as index.html's sign-in modal / wordle.html's summary modal,
   duplicated here rather than shared since only one page's CSS loads at a time. */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(44, 44, 42, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 300;
}

.modal-dialog {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 52px 24px 24px;
    width: 100%;
    max-width: 400px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

.modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    border-radius: var(--radius-sm);
    z-index: 1;
}

.modal-close:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.sudoku-summary-celebrate {
    position: relative;
    display: flex;
    justify-content: center;
    height: 64px;
    margin-bottom: 8px;
}

.sudoku-summary-trophy-wrap {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--color-primary-tint);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sudoku-summary-trophy-wrap svg {
    width: 30px;
    height: 30px;
}

.sudoku-summary-confetti {
    position: absolute;
    top: 8px;
    width: 7px;
    height: 7px;
    border-radius: 2px;
}

.sudoku-summary-confetti-1 {
    left: calc(50% - 92px);
    background: #F2B705;
    transform: rotate(20deg);
}

.sudoku-summary-confetti-2 {
    left: calc(50% - 68px);
    top: 34px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--color-danger);
}

.sudoku-summary-confetti-3 {
    right: calc(50% - 92px);
    background: var(--color-primary);
    transform: rotate(-20deg);
}

.sudoku-summary-confetti-4 {
    right: calc(50% - 68px);
    top: 34px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--color-success);
}

.sudoku-summary-title {
    text-align: center;
    font-size: 22px;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 4px;
}

.sudoku-summary-subtitle {
    text-align: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.sudoku-summary-breakdown {
    border-top: 0.5px solid var(--color-border);
    padding-top: 12px;
    margin-bottom: 16px;
}

.sudoku-summary-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--color-text-secondary);
    padding: 4px 0;
}

.sudoku-summary-line-label {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sudoku-summary-line-icon {
    display: flex;
    flex: 0 0 auto;
    color: var(--color-primary);
}

.sudoku-summary-line-icon svg {
    width: 16px;
    height: 16px;
}

.sudoku-summary-total {
    border-top: 0.5px solid var(--color-border);
    margin-top: 6px;
    padding-top: 10px;
    font-weight: 700;
    color: var(--color-text);
    font-size: 16px;
}

/* ---------- Share options (Daily/Classic/Tournament completion) ---------- */
.sudoku-share-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sudoku-share-option {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    padding: 14px 16px;
    border: 1.5px solid var(--color-primary);
    border-radius: var(--radius-lg);
    background: var(--color-primary-tint);
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    transition: filter 0.15s;
}

.sudoku-share-option:hover {
    filter: brightness(0.97);
}

.sudoku-share-friends {
    border-color: var(--color-success);
    background: #E3F5EE;
}

.sudoku-share-option-icon {
    flex: 0 0 auto;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: white;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sudoku-share-friends .sudoku-share-option-icon {
    color: var(--color-success);
}

.sudoku-share-option-icon svg {
    width: 22px;
    height: 22px;
}

.sudoku-share-option-body {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sudoku-share-option-title {
    font-weight: 700;
    font-size: 15px;
    color: var(--color-primary);
}

.sudoku-share-friends .sudoku-share-option-title {
    color: var(--color-success);
}

.sudoku-share-option-desc {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.4;
}

/* Badge + chevron live in their own column on the right, out of the title's text flow, so a long
   title never pushes the badge onto its own visual row underneath. */
.sudoku-share-option-side {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    color: var(--color-primary);
}

.sudoku-share-friends .sudoku-share-option-side {
    color: var(--color-success);
}

.sudoku-share-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 999px;
    background: var(--color-primary);
    color: white;
    font-size: 12px;
    font-weight: 700;
}

.sudoku-share-badge-green {
    background: var(--color-success);
}

.sudoku-share-option-side svg {
    width: 18px;
    height: 18px;
}

/* Set by markClaimed() once this specific option's bonus has been awarded -- the other option
   stays fully interactive regardless. */
.sudoku-share-option-claimed {
    cursor: default;
    opacity: 0.7;
}

.sudoku-share-option-claimed:hover {
    filter: none;
}

.sudoku-share-or {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-primary);
    font-weight: 700;
    font-size: 12px;
}

.sudoku-share-or::before,
.sudoku-share-or::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

@media (max-width: 420px) {
    .sudoku-cell {
        font-size: 13px;
    }

    .sudoku-key {
        font-size: 13px;
    }

    .sudoku-stats {
        padding: 12px 14px;
    }

    .sudoku-stat-label {
        display: none;
    }
}